**Respiratory**

 

Respiratory anatomy and physiology
Respiratory Physiology Dr F Roberts nda.ox.ac.uk

 

Respiratory history and exam

 

Patterns of breathing

Patterns of breathing PUK

 

Lung volumes and spirometry
Tidal Volume Volume of air moved during quiet respiration
Forced Vital Capacity FVC Volume expelled by a forced exhalation from a maximal inspiration
Functional Residual Capacity FRC volume of air in lungs after a normal tidal respiration (FRC=reserve volume + expiratory reserve volume)
Total Lung Capacity TLC volume in lungs after maximal inspiration
FEV1 volume exhaled in first second of an FVC
FET Forced Expiratory Time Time taken for subject to exhale their vital capacity in a forced expiration (3-4 secs)
Maximum Mid Expiratory Flow MMEF the flow rate of expired air over the middle 50% of the FVC
Maximum Voluntary Ventilation MVV max volume of air that can be moved in and out of the lung per unit
Vital Capacity VC Total volume expelled by a slow exhalation from a maximal inspiration
Residual Volume RV

 

Spirometry patterns – obstructive and restrictive lung disease
normal Sharp bend or knee at around 1 second as flow reduces and lung empties.Ratio of FEV1 to FVC should be > 0.7
obstructive FEV1/FVC <80%increased TLC
increased FRC
increased RVAsthma
COPD
Empysema
Bronchiectasis

restrictive
  • FEV1/FVC >80%decreased TLC
    decreased VCCurve normal shape but reduced amplitudeSarcoid
    Diffuse interstitial fibrosis
    Scoliosis
    Neuromuscular disease eg polio MG

 

Restrictive spirometry pattern

 

Obstructive spirometry pattern

Spirometry volume flow loop

Volume flow loop

http://youtu.be/DDzyMYqKd7U

 

Peak flow meters

http://www.youtube.com/watch?v=LPA-XKU3hD8
http://www.youtube.com/watch?v=dPDHsReZfQ0
www.peakflow.com.

Peak Flow Meters

 

  • Peak flow measurement
  • Set meter to zero
  • Connect disposable mouthpiece
  • Stand (or if unable sit) upright
  • Make sure fingers do not obstruct the PEFR slide
  • Inhale deeply, place lips around meter making a tight seal. Breathe out forecfully whilst holding the meter horizontal.
  • Note the reading
  • Repeat twice unless patient unable to do so
  • Record the highest of the 3 readings.

 

PEF rates (reproduced with permission Clement Clarke)

 

PEF rates Adults (reproduced with permission Clement Clarke)

 

Asthma

Acute Asthma – see emergencies section

Episodic variable airways obstruction characterised by

  • 1 hyper-reactivity and hypertrophy of bronchiolar smooth muscle
  • 2 chronic inflammation and oedema of bronchiolar walls and
  • 3 excessive secretion of thick mucus which plugs the bronchioles and narrows the airways still further

Symptoms may be triggered by exercise, change in temperature, smoky environments and be worse at night. May be history of atopy.

Diagnosis is suspected clinically based on symptoms but must be confirmed by spirometry, demonstration of pef variability and response to treatment.

 

Asthma pathophysiology

 

Diurnal variability

  • Worse at night and early morning best in afternoon.
  • % variability = (highest- lowest reading)/highest reading x 100
  • Asthma likely if
  • PEF variabilty > 20%
  • > 60 l/min
  • Occurs > 3days over 2 week monitoring period

Peak flow variability

Asthma treatments

 

Short and long acting Beta agonists
SABA

  • Salbutamol
  • Terbutaline
1 Cause relaxation of bronchiolar smooth muscleonset 10m peak 25m duration 4-6 hrs2 Inhibit release of inflammatory mediation3 Improve clearance of mucusUsed for acute relief or in anticipation of bronchospasm eg before exercise.Nebulised salbutamol 2.5-5mg every 15-30m in severe asthma.
LABA

  • Salmeterol
  • Formoterol
Relieve symptoms over 12hr periodSide-effects – tremor, nervous tension hypokalaemia and muscle crampsLABA must never be used in asthma without an inhaled corticosteroid – risk of severe acute asthma and death

 

Inhaled steroids

mainstay of treatment in asthma

Actions
  • attenuate the inflammatory process:
  • reduce acute and chronic inflammation.
  • decrease airway hyper-reactivity.
  • stop bronchiolar smooth muscle hypertrophy
  • reduce mucous hypersecretion and plugging
Side Effects
  • immune suppresion
  • metabolic
  • adrenal suppression
  • local effects

At lower doses little steroid is absorbed systemically side-effects are minimal even in children.

Higher doses of inhaled steroids and oral steroids may cause adrenal suppression.

Local Sore mouth, hoarse voice and oropharyngeal thrush infection due to local immune suppression.Reduce by using a spacer or by rinsing mouth and throat after use.
Systemic  During long-term use of high dose inhaled (or oral steroids) there may be increased risk of osteoporosis in adults, and the dose of steroid should be kept at the lowest level needed to control symptomsExcessive doses should be avoided in children, due to the risk of significant systemic absorption and adrenal suppression.
Preparations
  • Beclomethasone
  • Budesonide
  • Fluticasone
  • Mometasone

 

 

3rd/4th line treatments

 

Leukotriene receptor blockers – montelukast zafirlukast
Block inflammatory mediators released by eosinophils and other inflammatory cells which would otherwise cause bronchoconstriction, increased mucus secretion and mucosal oedema.Effective especially in exercise induced asthma and rhinitis associated asthmaod oral ingestionSide effects: GI disturbance, headache, thirst, insomnia

 

Short acting  Antimuscarinics – Ipratropium
  • nebulised (steri-neb) in acute asthma as adjuvant to  β-agonist
  • occ used in chronic asthma but SABA usually preferrered ???
Long acting anticholinergic Tiotropium used in COPD only
Block acetylcholine from the vagal parasympathetic fibres reducing bronchoconstriction and mucus secretionside effects: dry mouth, nausea, constipation, glaucoma bladder outflow obstruction tachycardia

 

Xanthines Theophylline Aminophylline
Phosphodiesterase inhibitorsCause build up of cAMP relaxing airway smooth muscleUsed in stable COPD or acute severe asthma

 

Asthma guidelines Adults SIGN/BTS 2011
1 mild
intermittent
short acting  β-agonist prn
2 regular
preventer
add inhaled steroid200-800 μg BDP equivalent/day
3 add-on
therapy
add LABAonly continue if good responseotherwise increase steroid to 800 μg/d
4 persistant
poor control
Increase steroid to 2000 μg/d
consider adding other Rx:leukotriene antagonistsor β-agonist tabsor SR theophylline
5 frequent
continuous
oral steroids
Refer

Single maintenance and reliever therapy SMART

eg Symbicort (budesonide/formoterol) can be used for maintenance therapy and the dose temporarily increased to provide relief of exacerbations – simplifying management and reducing prescription cost to patients. SMART DTB Nov 2011

Poor control

  • Use of > two B2 agonist MDIs per month
  • Use of a B2 agonist 3x/week or more
  • Nocturnal symptoms, daytime symptoms, limitation of normal activity

 

Asthma guidelines children under 5
1 mild intermittent short acting β-agonist prn
2 regular preventer add inhaled steroid200-400 μg/d in bd doseconsider LRA if inhaled steroid can’t be used
3 add-on therapy add long  acting β-agonistConsider adding leukotriene receptor antagonists.In those children already taking leukotriene antagonists alone reconsider adding steroid 200-400mcg/dayIn children under 2 years consider going to Step 4
4 persistant poor control refer paeds

 

Asthma children 5-12 SIGN/BTS 2011
1 mild intermittent short acting B2 agonist prn
2 regular preventer add inhaled steroid 200-400μg/dor leukotrine antagonist if steroids cant be usedstart at 200μg/d in two divided doses
3 add-on therapy inhaled steroids 200-400  μg/dayadd LABA
4 persistant poor control inhaled steroid 400 μg/dinhaled LABAconsider trials of increased steroids to 400 μg/d and referralcontinue LABA increase steroids if still poor controlbut stop LABA if no response to thisConsider leukotrine antagonist or theophylline
5 high dose/oral steroids inhaled steroid 800 μg/d
oral steroids at lowest doserefer paeds

 

Asthma steps by specific preps (Salford MMT)

 

Inhaled asthma drugs
Anti-inflammatory Sodium Chromoglycate = Intal  or  Nedocromil =Tilade
SA anticholinergic Ipratropium = Atrovent
LA anticholinergic Tiatropium/Spiriva COPD only
Steroids Beclomethasone = Qvar Asmabec Pulvinal ClenilBudesonide = PulmicortFluticosone = FlixotideMometasone=Asmanex
SABA Salbutamol = Ventolin Salamol AsmasalTerbutaline = Bricanyl
LABA Salmeterol = Serevent NeoventBambuterol = BambuterolFormoterol = Oxis Atimos

 

Combinations
Combivent ipratropium+salbutamol
Symbicort 100/6 Budesonide+Formoterol
Fostair Beclomethasone+Formoterol

Fostair_FDG

Seretide Fluticasone+Salmeterol

 

seretide like flixotide serevent like ventolin
salbutamol ventolin
salmeterol serevent
seretide serevent + flixotide
Seretide accuhaler salmeterol 50mcg+ flixotide (100/250/500)
Seretide evohaler salmeterol 25mcg+ flixotide (50/125/250)

 

Inhaler technique

  • Shake inhaler
  • Remove cap
  • Inhale deeply then fully exhale
  • Seal mouth lips around mouthpiece
  • Breathe in via mouthpiece whilst pressing down on top of inhaler
  • Continue breathing in deeply to get drug deep into lungs
  • Hold breathe for 10 seconds or as long as is comfortable, then breathe out slowly
  • Repeat as necessary after 30 seconds
  • Replace cap on mouthpiece
  • If steroid inhaler rinse out mouth.

http://youtu.be/51Zjwcx7Zbs

GOLD guide inhalers and spacers

Do healthcare professionals have sufficient knowledge of inhaler techniques in order to educate their patients effectively in their use?

 

Spacer devices
volumatic salbutamol salmeterol fluticasone beclomethasone seretide
aerochamber salbutamol terbutaline salmeterol fluticasone beclomethasone budesonide seretide symbicort atrovent
able spacer salbutamol terbutaline salmeterol fluticasone beclonethasone budesonide seretide symbicort atrovent
nebuhaler terbutaline budesonide symbicort atrovent

Spacers

  • An MDI & spacer is the preferred option in adults and should be used in all < 12s.
  • Advantages – greater delivery to the bronchioles, less oral deposition, so reduced frequency of oral thrush and it is as good as a nebuliser during acute exacerbations.
  • Should be demonstrated and technique checked.
  • Should be washed weekly with detergent and allowed to air dry (NOT wiped dry).
  • Should be changed every six months.
  • Inspiration should take place as soon as possible after MDI actuation.
  • Tidal breathing (x5) is as effective as and more preferable than deep breathing.

http://www.youtube.com/watch?v=CEUm–zy8xY

http://www.youtube.com/watch?v=8BaT2XIrePE

http://www.youtube.com/watch?v=h6eD81NyBAU

http://www.youtube.com/watch?v=esmEVr4qROQ

http://www.youtube.com/watch?v=A7DhGX0p1KY

 

Inhalers and choice of device

MIMS Chart – asthma & COPD preperationss and devices

MIMS Inhaler Charts – BAIs

MDI

MDI and spacer

Autohaler – Easibreather breath actuated inhaler

DPI / turbohaler

Accuhaler

 

Inhaler Colour / appearance
SABA blue
SA antimuscarinic grey or clear + green
LABA green
LA antimuscarinic oval container requiting capsules
Steroid brown /maroonorange (fluticasone)
Combined steroid / LABA Purple or red

 

Asthma monitoring and review

http://hacking-medschool.com/qof-asthma

Patient understanding of ‘preventers’ and ‘relievers’ and their appropriate usage, also ask about any side effects.
inhaler technique.
Compliance as per computer and patient history – number of salbutamol MDIs used
Any exacerbations, hospital admissions or oral steroid use since last review
RCP 3 Questions

  • 1 Has your asthma interfered with your usual activities (e.g. housework, work, school, hobbies etc)?
  • 2 Have you had difficulties sleeping because of your asthma symptoms (including cough)?
  • 3 Have you had your usual asthma symptoms during the day (cough, wheeze, chest tightness or breathlessness?)
Other markers of controlHaving to use a reliever more than 3 x per week?
The need to step up or step down treatment ? change self management planIf symptoms control excellent over a period of at least three months then consider dropping the inhaled steroid dose by 25 to 50% and review after another three months.
Check Smoking status and cessation advice.
Osteoporosis risk  Adults who have used oral steroids for > 3 months or have had 3 or more courses of oral steroids in a life time need a DEXA scan and consideration for osteoporosis prophylaxis e.g. biphosphonates. Furthermore, patients on beclomethasone doses greater than 800mcg a day should be considered for osteoporosis prevention lifestyle advice +/Calcichew D3 forte.
At repeat medication re-authorisation clinician should look at

  • Beta 2 agonist over usage – arrange asthma clinic review?
  • Oral steroid/high dose inhaled steroid usage and need for osteoporosis prophylaxis.
  • Correct Read H33 Read coding & is it in the Problem page?
  • On the asthma register?
  • Recall in place?
Check Smoking status and cessation advice

 

Asthma (Read Code H33)

Clinical features that increase the probability of asthma

Diagnosis (adults) – base initial diagnosis on a careful assessment of symptoms and spirometry (or PFR if unavailable, see below). Move straight to a trial of treatment if a high probability of asthma.

Note: PFR based diagnosis may be used in a Primary care setting.

>20% diurnal variation in recorded EU PFR (am and pm prior to any beta agonists) on 3 or more days each week for 2 weeks.

Variation % = (maximum PFR-minimum PFR)/ maximum PFR x100.

Diagnosis (children) – assess clinically with symptoms (see below). Move straight to a trial of treatment if high probability of asthma. If less clear, consider lung function tests, if age >5 (spirometry pre and post bronchodilator, PFR).

Do not add children to the asthma register unless you are confident of the diagnosis!

Clinical features that increase the probability of asthma

  • More than one of the following symptoms: wheeze, breathlessness,

chest tightness and cough, particularly if:

    1. Symptoms worse at night and in the early morning
    2. Symptoms in response to exercise, allergen exposure and cold air
    3. Symptoms after taking aspirin or beta blockers
  • History of atopic disorder

  • Family history of asthma and/or atopic disorder
  • Widespread wheeze heard on auscultation of the chest

  • Otherwise unexplained low FEV1 or PEF (historical or serial readings)

Otherwise unexplained peripheral blood eosinophilia

Spirometry based diagnosis (may be falsely negative in a patient who is well at time of assessment)

Fev1/FVC < 70% = an obstructive picture (Asthma or COPD) but in asthma there is reversibility in the lung function.

>15% or > 200mls improvement in FEV1 after 400mcg (4 puffs via an MDI) of salbutamol via a volumatic.

>15% or > 200mls deterioration in FEV1 after 15mins of exercise.

  • Having made the diagnosis please place them on the asthma register and put the H33 Asthma Read code in their Problem page.
  • Arrange a New Patient Asthma clinic appointment with the Practice Nurse.

Don’t forget basic health promotion!

  1. Smoking status and cessation advice – Read code.

  2. Flu vaccination if on inhaled steroids

  3. Life style and exercise.

  4. Asthma self management plan.

  5. Patient information leaflets.

  6. Pre-payment certificates for script costs.

Adult asthma guidelines BTS 2011

Step 1 Inhaled short acting B2 agonist as required

Step 2 Add inhaled steroid 200-800mcg BDP equivalent/day bearing in mind that 400mcg is the starting dose for many patients

Step 3 Add inhaled Long Acting B2 agonist (LABA) .

  • Continue LABA if there is a good response

  • Discontinue LABA if no response and increase inhaled steroid to 800mcg a day

  • If some benefit from LABA but control inadequate increase inhaled steroids to 800mcg/day and then consider adding in other therapies e.g. leukotriene receptor antagonists (1 month trial) or SR theophylline.

Step 4 Consider trials of:

  • Increased inhaled steroid up to 2000mcg a day.

  • 4th drug. Eg. Leukotriene receptor antagonist, B2 agonist tablets or theophylline.

Step 5 Consider:

  • Oral steroid at lowest dose to maintain control

  • Maintain high dose inhaled steroid 2000 mcg/day

  • Other treatments to minimize oral steroid use.

Refer.

Note: start at the step most appropriate to initial severity. Step up (remember check concordance and diagnosis) or step down depending on control.

Indications to progress to a higher step.

Usage of > one B2 agonist MDI per month = poor control.

Usage of a B2 agonist 3x/week or more = poor control.

Nocturnal symptoms, daytime symptoms, limitation of normal activity = poor control

Please note the preferred CFC free beclomethasone inhaler is Clenil Modulite (should be prescribed as brand) and is dose for dose equivalent to Becotide. Avoid QVAR which is expensive and not bio equivalent to Becotide.

Children 5-12 years asthma guidelines BTS 2011

Step 1 Inhaled short acting B2 agonist as required

Step 2 Add inhaled steroid 200-400mcg BDP equivalent/day bearing in mind that 200mcg is the starting dose for many patients (but dose appropriate to severity of disease)

Step 3 Add inhaled Long Acting B2 agonist (LABA) .

  • Continue LABA if there is a good response

  • Discontinue LABA if no response and increase inhaled steroid to 400mcg a day

  • If some benefit from LABA but control inadequate increase inhaled steroids to 400mcg/day.
  • Consider adding in other therapies e.g. leukotriene receptor antgonists or SR theophylline.

Step 4 Increase inhaled steroid up to 800mcg a day.

Step 5 Consider:

  • Use daily steroid tablet in lowest dose possible to maintain control.

  • Continue high dose inhaled steroid 800mcg a day

Refer.

Children under 5 years BTS asthma guidelines 2011

Step 1 Inhaled short acting B2 agonist as required

Step 2 Add inhaled steroid 200-400mcg BDP equivalent/day bearing in mind that 200mcg is the starting dose for many patients (but dose appopropriate to severity of disease) or leukotriene receptor antagonist if inhaled steroid can’t be used.

Step 3 Children < 2 years consider going to step 4.

Children > 2 years:

  • In those taking inhaled steroids 200-400mcg/day consider adding leukotriene receptor antagonists.

  • In those taking leukotriene receptor antagonists alone reconsider the addition of inhaled steroid 200-400mcg/day.

Step 4 Refer

Note: monitor growth in children.

Factors to assess on asthma/medication review – 10 points!

  1. Patient understanding of ‘preventers’ and ‘relievers’ and their appropriate usage, also ask about any side effects.

  2. Check inhaler & spacer technique.
  3. Compliance as per computer and patient history – number of salbutamol MDIs used in last 12 months
  4. Have they had a new spacer within the last 12 months?

  5. Smoking status and cessation advice.

  6. Any exacerbations, hospital admissions or oral steroid use since last review?
  7. The RCP 3 Questions
  1. Has your asthma interfered with your usual activities (e.g. housework, work, school, hobbies etc)?

  2. Have you had difficulties sleeping because of your asthma symptoms (including cough)?
  3. Have you had your usual asthma symptoms during the day (cough, wheeze, chest tightness or breathlessness?)

  1. Having to use a reliever more than 3 x per week?

  2. The need to step up or step down treatment – ? change self management plan.*
  3. Are they aware of the month of their next annual review (schedule of care)?

*Review should incorporate a written action plan (BTS 2011). Download the ‘Be in Control’ asthma action plan ( or ‘My Asthma for age 6-11) from www.asthma.org.uk/control .

Osteoporosis risk

Treatment strategy for preventing steroid induced osteoporosis
Consider every patient for active osteoporosis prevention who has had:

  • Oral or iv steroid treatment for greater than 3 months.
  • A cumulative lifetime dose of 1g oral prednisolone (e.g. > 4 x seven day courses in a lifetime).
  • Inhaled steroid > 1000mcg day beclomethasone.

 

If unable to have a DEXA then treat, 1st line = a bisphosphonate.

 

If steroid course likely to > 3 months then treat, 1st line = a bisphosphonate.

 

If able to have a DEXA and the T score above -1.5 treat with lifestyle measures +/- calcium supplementation.

NB DEXA needs repeating every 3 years

 

If the T score is = -1.5 or lower then treat, 1st line = a bisphosphonate.

NB DEXA needs repeating every 3 years

 

Indication for consultant referral

 

  1. Diagnosis unclear.

  2. Failure to control symptoms beyond Step 4.

  3. Consideration for home nebs or home oxygen.

  4. Acute severe exacerbations.

  5. Troublesome drug side effects or complications of Rx/asthma.

  6. Suspected occupational asthma

Structure of the asthma service

All patients with proven asthma will be tagged with the H33 Read code, as this is required for Read code QOF based recall which identifies patients who have not had a formal asthma review in the last 15 months.

At repeat medication re-authorisation doctors must look at:

  1. Beta 2 agonist over usage – arrange GP review?
  2. Spacer on repeat script? Check when last issued.

  3. Oral steroid/high dose inhaled steroid usage and need for osteoporosis prophylaxis.

  4. Correct Read H33 Read coding & is it in the Problem page?
  5. Annual review in date?
  6. If seeing the patient for their annual review ask and document the ten point review ( use S1 template along with prompts from the auto-consultation).

QOF 2011/12

Asthma 3 – Annual recording of smoking status in asthmatic patients ages 14-19.

Target 80%.

Asthma 6 – Annual asthma review to be recorded.

Target 70%.

Asthma 8 – Post 1/4/06 need to record ‘measures of variability or reversibility’ at

diagnosis of patients aged 8 and over.

Target 80%.

References: British Guideline on the Management of Asthma – BTS.

May 2011.

www.asthma.org.uk

QOF.

 

Indication for consultant referral

  • Diagnosis unclear.
  • Failure to control symptoms beyond Step 4.
  • Consideration for home nebs or home oxygen.
  • Acute severe exacerbations.
  • Troublesome drug side effects or complications of Rx/asthma.
  • Suspected occupational asthma

 

Asthma management plans

Asthma in adults: Creating an asthma action plan Mayo Clinic

Asthma control test adults and children

 

Drugs causing asthma

AspirinNSAIDs Cyclo-oxygenase inhibitors which reduce the production of bronchodilating prostaglandins.Asthmatics should be repeatedly warned to avoid aspirin and all NSAIDs
Beta Blockers Block the bronchodilating beta2-receptors in the bronchioles, precipitating asthma in predisposed patients also prevent access by salbutamol and terbutaline to the bronchiolar beta-receptors should acute attack occur.All beta-blockers may precipitate acute asthma in predisposed patients, even in minute doses (e.g. eye drops).Selective beta-blockers are safer but should still be avoided if possible
N-Acetyl cysteine used to treat paracetamol toxicity
Tartrazine food colourant/additive
webmd.com medications triggering asthma

 

Asthma allergies and rhinitis

There is an overlap between asthma and atopic conditions such as eczema and allergic rhinitis.

Patients may have raised IgE and eosinophils and may test positive on RAST or patch testing.

Treatment of allergic rhinitis will improve asthma control.

Asthma and rhinitis are type 1 (immediate) hypersensitivity reactions – inhaled antigens bind to IgE on surface o mast cells causing degranulation and release of inflammatory mediators. Symptoms can come on over 5-10 min.

Asthma and Allergic Rhinitis Questionnaire allergy uk.org

http://youtu.be/aF-JIMGsDrs

Allergy Testing

http://youtu.be/oED7kAIjFFY

http://youtu.be/Nqp6S7RJ38A

http://youtu.be/oF6n0l5ErOA

Allergy Testing NHS Choices

Allergen avoidance

Grass and fungal pollens

Housedust mites

Pets

Occupational

 

Asthma prevention

Breastfeeding may have protective effect on child, and so should be encouraged due to other beneficial effects.

 

Breathing exercises

breathing exercises.com

abc of yoga.com pranayama

http://youtu.be/LDgvhZjz0g8

Buteyko

http://youtu.be/LTXabQfAgQs

 

COPD

Chronic slowly progressive lung disease of smokers.

Obstructive pattern on spirometry.

Degree of impairement is relatively stable over period of months (without diurnal or day to day variability).

Airflow obstruction is partially/minimally reversible by bronchodilator or other therapy.

  • COPD
  • Characteristic signs and symptoms plus an obstructive spirometry with post-bronchodilator FEV1/FVC ratio of 0.7.
  • FEV1 < 80% predicted
  • FEV1/FEV ratio < 70 % (ie obstructive picture)
  • no diurnal variation and little <15% or 200mls reversibility.

 

COPD previously classified into 2 clinico-pathological syndromes
chronic bronchitis daily cough productive of sputum for 3 months in 2 consequitive years.
emphysema destruction of alveolar walls causing irreversible expansion and air trapping.

 

Severity FEV1 Clinically
mild 50–80%predicted Chronic cough with SOB on maximal moderate exertion
moderate 30–49%predicted Chronic cough with SOB on minimal exercise+/- cor pulmonale
severe < 30%predicted SOB at rest and severe limitation of exercise

 

COPD diagnosis

Hx > 10 pack years smoking hx and > 35 years – if not reconsider the diagnosis.

FEV1/FEV ratio <70%, with no significant reversibility

Grade and record mild, moderate or severe on the basis of Fev1/predicted.

CXR to exclude bullae, tumour, pulmonary oedema, bronchiectasis etc.

FBC if suspicion of anaemia or polycyctheamia.

COPD NICE CG101

COPD prodigy.clarity.co.uk

http://youtu.be/qo8azwv_RLU

http://youtu.be/KqoHYJ3pOoY

http://youtu.be/HttxNPQ6SzM

http://youtu.be/aktIMBQSXM

http://youtu.be/oMPcku-B0So

http://youtu.be/f_OreoetpLc

 

MRC breathless scale
1 Not troubled by breathlessness except on strenuous exercise
2 Short of breath when hurrying or walking up a slight hill
3 Walks slower than contemporaries on level ground because of breathing or has to stop for breath when walking at own pace
4 Stops for breath after walking about 100m or after few minutes on level ground
5 Too breathless to leave the house, or breathless when dressing/undressing

 

COPD management

Nonpharmacological

  • Smoking cessation is the most important intervention and will slow further decline to the rate of a non-smoker (see Pareto graph)
  • Pulmonary rehabilitation should be offered to all patients who are functionally limited by COPD, (MRC Grade 3 and above) including those who have had a recent hospitalisation or exacerbation. Pulmonary rehabilitation is not suitable for patients who are unable to walk or who have had a recent MI. Polmonary rehab invimvolves a 6-12 w program of exrercise, education psychological and social interventions delivered by MDTs of respiratory physiotherapists and nurse.
  • Explanation and information about COPD for patient and carers.
  • Flu & Pneumovax vaccination.
  • Increasing exercise +/ weight loss increase lung function and decrease symptom scoring.
  • Screen for and treat depression, which is often missed by doctors.
  • Met. Office Health Forecasting – early warning and telephone support for patients
  • Winter fuel programmes
  • Work with the patient to develop a self management plan:
  • When to seek an antibiotic.
  • When to seek oral steroids.
  • When to seek medical advice.
  • When to seek emergency medical advice.

 

COPD medical management

Airflow obstruction in COPD is mostly irreversible but bronchodilatiors can help to some degree.
Mucolytics trial of carbocisteine for four weeks if chronic productive coughavoid if they history of peptic ulcerStop if no improvement
Short Acting
Bronchodilators
antimuscarinics preferered to SABA in COPD as they reduce mucus hypersecretion as well as causing bronchodilation
Long Acting
Bronchodilators
antimuscarinics (tiotropium) or LABA (salmeterol eformoterol)if tiotropium started then stop ipratropium.LABAs are usually prescribed with a steroid though it is not clear if there is the same risk as when used alone in asthmaCOPD (Spiriva)
Short + Long acting
bronchodilators
if not already on Symbicort/Seretide for exacerbation prevention – see below
Steroids have little effect in COPD.May slightly improve FEV1 at high dose and reduce exacerbations.Hence reserved for psatients with FEV1 <50% and > 2 exacerbations per year.usually given as LABA/ steroid combination eg Seretide 500 1 puff BD.
Xanthines may be worth trying in patients unresponsive to the above

 

When to refer

  • Uncertain diagnosis e.g. Hx or Ex = age <35, < 10 pack years, wt loss, haemoptysis etc, unilateral signs.
  • Atypical spirometry – restrictive rather than an obstructive picture.
  • Failure to respond to Rx. Check compliance and technique first
  • Consideration for oral steroids long term, home nebs or LTOT
  • Complications, such as Cor Pulmonale
  • Severe COPD.
  • surgery bullectomy, lung transplant, lung volume reduction surgery

 

Refer for LTOT if

  • FEV< 30%
  • Cyanosis
  • Polycythemia
  • Cor pulmonale
  • Peripheral oedema
  • O2 sats <92% in room air.

 

Consider Palliative care if 2 or more of following consistently

  • FEV1 <30% of predicted
  • SOB on any exertion
  • Significant wt loss
  • Recurrent admissions for exacerbations
  • Social isolation/depression
  • Severe heart failure

 

COPD inhalers

 

LABAs in COPD and asthma

Controversies Regarding Long-acting ?2-agonists Medscape

http://www.pamf.org/asthma/medications/inhaled/longacting.html

fda.gov LABAs

LABAs in Asthma Cochrane

 

Mucolytics in COPD

 

Oxygen in COPD

http://hacking-medschool.com/oxygen-prescription-domicilliary-oxygen

JEMS connect

http://youtu.be/XFieSB3TzK4

http://youtu.be/FT7t9hroLLg

http://youtu.be/iRniUCT0zWw

 

Exacerbations COPD

1 Increased sputum volume or discoloured sputum use antibiotics for 1 week (amoxycllin or erythromycin 1st line).

30% are viral, 30-50% bacterial in origin with the remainder undetermined.

Prescribe antibiotics if increased sputum purulence.

If no increase in sputum purulence then antibiotics are not needed unless consolidation on chest x-ray or other signs of pneumonia.

Organism H.influenzae, S.pneumoniae, M.catarrhalis.

Rx Amoxicillin 500mg three times daily for five days, or doxycycline 200mg Day 1 then 100mg daily for 4 days.

Co-amoxiclav or ciprofloxacin 2nd line for 1 week if no improvement

2 SOB/wheeze – increase salbutamol use to at least QDS via a spacer.

3 Consider oral steroids (prednisolone 40mg a day for 7 to 10 days) if

a) are known to be steroid responsive

b) a new presentation where steroid responsiveness in unknown or

c) are already on steroids.

Remember they need a DEXA scan and consideration for osteoporosis prophylaxis if they have more than 3 months of oral steroids or 3 courses on oral steroids in a 12month period.

Indications for admission

Admit to hospital if unwell (e.g. confused, cyanosed, very short of breath), no improvement on treatment, unable to cope at home

  • Signs of a severe acute exacerbation = cyanosis, RR > 25, Pulse > 110, unable to speak in sentences or confused.
  • Patient already on maximum treatment
  • Patient on LTOT
  • Patient unable to cope at home
  • Failure to respond to Rx
  • Complications e.g. Cor pulmonal
COPD Home Versus Hospital (NICE 2004 EFIGM 2005)
factor favours hospital Rx favours home rx
able to manage at home no yes
breathlessness severe mild
general condition poor/deteriorating good
level of activity poor/bed-bound good
cyanosis yes no
worsening oedema yes no
concious level impaired normal
already on LTOT yes no
social circumstances living alone / not coping good
acute confusion yes no
rapid rate onset yes no
significant comorbidity yes no
SaO2<90% yes no
CXR changes yes no
arterial pH <7.35 >7.35
arterial pO2 <7kPa >7kPa

 

COPD patient letter

We are writing with some important information for you about your COPD (also known as chronic bronchitis and emphysema)

Many people with COPD get flare ups of their condition (sometimes called chest infections or exacerbations). Flare ups happen much more frequently in the winter months, particularly if the weather is very cold. This increase in flare ups leads to increased pressure on emergency services, hospitals and A&E departments. However we know that if you can recognise a flare up early and take the correct action you can avoid A&E and reduce your risk of a hospital admission.

Reducing your risk of flare ups and hospital admissions

Make sure you have at least a week’s supply of your regular medicines throughout the winter.

Keep your house warm. The living area should be around 21 degrees and the bedroom 18 degrees. If you would like help with keeping your house warm contact AWARM on 245 7422.

Recognise the early signs of a flare up:

  • More breathless than usual
  • More phlegm than usual
  • Your phlegm changes colour

If you think you are experiencing a flare up contact your GP or practice nurse as soon as possible for advice.

If you already have a self management action plan use your rescue medications as soon as you notice a flare up starting.

You can also contact NHS Direct on 0845 4647 for advice if you are unsure about your symptoms or your medications.

If you are known to the CAST team, you can ring them directly on their number that you will have been supplied with previously. If they are not available to take your call leave a short clear message on the answer phone with your name and contact details. They will get back to you within 24 hours.

Please only attend the A&E Department at the Hospital if you are unwell and your condition can’t wait or if you have accessed all of the above without improvement. Remember that A&E services are for major injuries and life threatening illness only.

Remember to keep warm, keep well and choose well this winter.

(Salford NHS)

COPD self management plan

KNOW YOUR MEDICATION

INHALERS

Bronchodilators (Relievers): These relax the muscles in your airways & make it easier for you to breathe. Shorting acting inhalers start to work within about 10 minutes & the effect should last about 4 hours. Your short acting ‘reliever’ medication is ______________________

Long acting inhalers (Preventers) take longer to take effect but last 12 –24 hours.

Your long acting medications are__________________

Steroid inhalers (Preventers): usually used with a spacer device. They are often combined in a single inhaler with one of the long acting bronchodilators.

Your steroid inhaler is _____________

Please contact your surgery in plenty of time to ensure you don’t run out of any of your medication

EXACERBATIONS (when you get worse)

You should increase your treatment early when you are unwell. You should have a ready supply at home of additional tablet medications needed if you are feeling worse (eg antibiotics, steroids). If you are unwell, follow the instructions on page 3 of this leaflet.

ADDITIONAL TABLET MEDICATIONS.

These tablet medications may be prescribed to help your breathing.

Steroid Tablets (Prednisolone 5mg): A course of these may need to be taken during an exacerbation and are taken in one morning dose.

Steroid tablet instructions: _________________________

Antibiotics: These should be taken if you have symptoms of infection ie coloured phlegm, increased phlegm being coughed up.

Antibiotic instructions: ______________________________

 

COPD Review

http://hacking-medschool.com/qof-copd

 

Hospital at home

HAH RVH

Pulmonary Rehabilitation @ medscape

BTS Pulmonary Rehab Guidelines

http://youtu.be/3goKl9Vr8iw

 

Alpha 1 antitrypsin deficiency

A1 antitrypsin breaks down neutrophil elastase in the lung. Congenital deficiency (Autosomal Codominant) allows the latter to run amok breaking down lung parenchymal tissue causing COPD and emphysema at an earlier age in smokers and nonsmokers.

Alpha 1 antitrypsin defficiency Medscape

http://youtu.be/CEYNJxDR_QM

http://youtu.be/SqGoZRBrlvs

http://youtu.be/wYsaosI26oQ

 

Respiratory failure definition
Arterial PaO2 <8kPa (normal range 10-13.1 kPa)
type 1  PaO2 <8kPa no hypercapnia
type 2  PaO2 <8kPa plus hypercapnia

 

Respiratory failure aetiology
Type1 impaired gas transfer across alveolar capillary membranedue to loss of alveolar tissue or increased thickness of alveolar capillary membraneDiffusion coefficient CO2 is 20 times that of O2 so this not affected unless/until gas transfer severely affected
Type2 reduced PaO2 and CO2 accumulationdue to hypoventilation (see below)or severe lung disease affecting exchange of both O2 and CO2end stage COPD, status asthmaticus, massive PE

 

Causes of hypoventilation
Central
  • drugs
    alcohol
    trauma
    raised ICP
Neurological
  • Cervical cord lesion (C345 supply to diaphragm) – tumour trauma syringomyelia
    Peripheral neuropathy
    GBS
    MND
    Myasthenia gravis
    Muscular dystrophy
Chest wall deformity
  • kyphosis
  • flail chest
  • obesity

Pink Puffers and Blue Bloaters

Respiratory failure PUK

Respiratory failure Medscape

Respiratory failure scottishintensivecare.org.uk

http://youtu.be/I7u9GvwkMxw

http://youtu.be/yet-VyVEPKw

http://youtu.be/M5WKos0pLeg

 

Domicilliary oxygen

Intermittent as required use for intermittent symptom controlif >21 cylinders/month then concentrator may be more economicalmay be sometimes appropriate in terminal care but O2 not indicated for simple breathlessness
LTOT Patients with chronic respiratory failure who1) they do not smoke; and2) they have a PaO2 < 7.3 kPa whilst breathing room air during a period of stability at least one month after any exacerbation of their lung disease.
COPD patients who continue to smoke do not derive the improved survival benefits of LTOT.Patients with COPD will only derive benefit if oxygen therapy is used for at least 15 hours/day.For patients with COPD 2l/min via nasal prongs is standard therapy, however higher rates of flow may be required, as guided by the respiratory physiciansPatients with type 1 respiratory failure may require significantly higher rates of flow, and subsequently need multiple oxygen concentrators
Ambulatory patients who desaturate on exercisePortable oxygen cylinders are available on a GP prescription(DD and PD size lightweight cylinder)following evaluation by a respiratory physician

Prescribe on HOOF form and fax directy to supplier (dependant on local arrangements/contracts) who then deliver directly to patients home.

MIMS Oxygen Concentrators: Procedure for Prescribing Tables

NHS Home Oxygen

Oxygen prescription PUK

Oxygen is a drug and should therefore be prescribed. Inappropriate concentrations may have serious or even lethal effects.

Patients should be advised of the fire risks with oxygen and they or their contacts must not smoke in the same environment.

Oxygen can be delivered either nasally or by mask. Prescribers should specify the oxygen delivery percentage, and flow rate for the mask, and the flow rate for nasal delivery.

The administration of high oxygen concentrations in acute COPD and other conditions vulnerable to hypercapnic respiratory failure leads to worsening of hypercapnic respiratory failure and respiratory acidosis. Patients with COPD (and other at-risk conditions) who have had an episode of hypercapnic respiratory failure should be issued with an oxygen alert card and a 24% or 28% Venturi mask. They should be instructed to show the card to the ambulance crew and emergency department staff in the event of an exacerbation. Alert cards are issued by the respiratory liaison nurse during a hospital admission.

http://youtu.be/h6jp68qsyGk

 

Acute Respiratory Failure

Acute respiratory failure

Acute respiratory failure Nursing Times.net

 

ARDS

Adult Respiratory Distress Syndrome

http://youtu.be/aXjaxvL6y7I

http://youtu.be/gEPJeHCKNAk

http://youtu.be/kQ9eCywj_Hs

 

Obstructive sleep apnoea

Sign 73 OSAHS – obstructive sleep apnoea/hypopnoea syndrome

Due to repeated intermittent upper airway colapse during sleep causing total obstruction (apnoea – patient stops breathing) or partial obstruction with (hypoventilation / hypoapnoea and snoring)

Patient goes through cycle of deep sleep with airways collase then stimulation /arousal with increased inspiratory effort and restoration of muscle tone then deeper sleep again.

Causes daytime sleepiness and increased CVS risk (via increased BP and as indipendant risk factor)

britishsnoring.co.uk epworth scale

Diagnosis is confirmed by sleep studies involving measurement of pulse oximetry, nasal airflow, snoring and respiratory effort.

Treatment

Behavioural

Wt loss, smoking, alcohol, eelevation of bed, avoid sleeping on back.

CPAP

Positive pressure from nasal or face mask splints open the upper airways preventing collapse and apnoea during deep sleep. Used for moderate (30-50) and severe (>50 apnoea/hypoapnoeas per hr) sleep apnoea.

Mandibular Advancement devices

Dental appliances which pull the jaw forward increasing airway diameter. Used in mild sleep apnoea or in patients intolerant of CPAP

http://youtu.be/CCi3l-T6PiQ

http://youtu.be/wk8c4rNrQ-A

http://youtu.be/Bxw_Bzsilf0

 

URTI MRTI LRTI
URTI rhinitisotitissinusitistonsillitsmastoiditispharyngitis
MRTI laryngitislaryngotracheitisepiglottitisbronchitis
LRTI pneumoniabronchiolitisempyema

 

Antibiotics in URTI

http://hacking-medschool.com/antibiotic-resistance

 

Delayed antibiotic prescriptions

Delayed Antibiotic Prescriptions cfp.ca

 

Common cold

http://youtu.be/DQGFosyzSVc

http://youtu.be/bE9wmPS1A70

http://youtu.be/KI9m0HbjNQQ

commoncold.org

Common Cold Centre

 

Pharyngitis laryngitis tonsilitis

http://youtu.be/xryqgSXe3Ik

http://youtu.be/J_aOlhtdkss

medical center.osu.edu tonsils

Peritonsilar Abcess Quinsy

http://hacking-medschool.com/quinsy-peritonsillar-abcess

 

Acute bronchitis and cough

Acute bronchitis and cough MeReC 2006;17(3)

Average length of illness is 3 weeks.

Most are viral and use of antibiotics have little benefit in otherwise healthy adults.

More benefit if > 65 years with cough and other co-morbidities.

Organism H.influenzae, S.pneumoniae, M.catarrhalis.

Treatment Amoxicillin 500mg three times daily for five days, or doxycycline 200mg Day 1 then 100mg daily for 4 days.

 

Cough causes

    • Pulmonary – any lung disease, asthma, smoking
    • Nasal – rhinosinusitis with post nasal drip
    • Oesophageal – GORD
    • Drugs – ACEIs

Safety net Refer urgently if potential cancer (under 2 week rule)

Acute cough has a sudden onset and usually lasts less than 3 weeks. Chronic cough lasts longer than three weeks.

Bronchitis- Is an inflammatory disorder that is usually caused by a virus; it can be acute or chronic in nature. Common offenders include influenza A or B, parainfluenza, respiratory syncytial virus, and rhinovirus. The incidence of bronchitis is higher in smokers, older adults, young children, and in the winter months. The cough initially starts as dry and nonproductive and after a few days usually becomes productive.

Pneumonia an inflammatory reaction usually caused by an acute bacterial, viral, or fungal infection. It may be preceded by an upper respiratory tract infection, ear infection, or eye infection. Individuals who have had surgery, smoke, drink alcohol, are immune suppressed, and have chronic respiratory or other debilitating illnesses pose a greater risk of developing pneumonia. Crackles that do not clear with coughing can be heard.

Asthma is an obstructive disease of the lungs characterized by airway inflammation and hyperreactivity. Asthma can be triggered by extrinsic factors such as mold, pollen, dust animal dander or by intrinsic factors such as stress, fatigue or exercise. Along with a cough, patients usually present with shortness of breath, wheezing, and chest tightness.

Chronic Obstructive Pulmonary Disease (COPD) is a progressive and irreversible syndrome characterized by diminished inspiratory and expiratory capacity of the lungs. It includes emphysema and chronic bronchitis. COPD is often associated with smoking. A chronic cough is associated with COPD along with a barrel chest, distant breath sounds, and tachypnea. An increase in sputum can indicate an exacerbation of COPD.

Additional Causes- There are numerous other causes of coughing including smoking, allergies, GORD, foreign body, croup, side effects of medications, inhalation injury, cancer, tuberculosis, cystic fibrosis and lung disease.

 

Chronic cough

Chronic cough Lancet 2008

Causes of persistent or relapsing cough

  • asthmatics (young children may present with cough without wheezing)
  • heavy smokers (beware cancer)
  • small children with catarrh
  • whooping cough / modified pertussis
  • Mycoplasma pneumoniae (3 month cough) Rx erythromycin/clarithromycin or doxycycline 2w
  • tuberculosis
  • Post viral infection the cough may last for some weeks

 

Bronchiectasis

Chronic airways disease with bronchial dilatation, mucociliary impairement and recurrent bacterial infections.

http://youtu.be/n6or6Bluzvc

http://youtu.be/Kk4x7DPJtRI

http://youtu.be/yISz4T1sp_8

http://hacking-medschool.com/bronchiectasis-children

Bronchiectasis BMJ 2010

 

Recurrent RTIs

Investigating recurrent RTIs in Primary Care BMJ 2009

 

Acute SOB

http://www.youtube.com/watch?v=hGBV3V3MZag

  • Causes of breathlessness
  • Respiratory – OAD, infection, effusion, pneumothorax, PE, restrictive airways disease, Ca
  • Cardiac – CHF, arrythmia, CHD
  • Anaemia
  • CRF – acidosis / Kussmauls
  • Hyperthyroidosm
  • Hyperventilation/Panic attack

 

Pneumonia

Infection within the alveoli.

May affect the alveoli within one or more lobes (lobar pneumonia) or in a more patchy distribution (bronchopneumonia)

Patient presents with fever, malaise, myalgia, rigors, cough, pleuritic pain +/- purulent (yellow green) sputum +/- haemoptysis.

http://hacking-medschool.com/pneumonia-emergencies

http://youtu.be/8_395O52uvU

http://youtu.be/XYTWbvItb0M

http://youtu.be/Aa5ZKE87Kaw

 

CRB-65 score for CAP

Confusion MSS<8 (new)
Urea >7 (if available)
Resp Rate >30
BP SBP < 90 or DBP <60 mm Hg
Age >65 yrs
1 point for eachmax score 4 for CRB65 and 5 for CURB65
Score 0-1 Low risk – may be suitable for home treatment
Score 2 Intermediate risk – probably needs referral needed
Score 3-4 High risk – urgent referral to hospital
CRB is risk of death / need for admission score.Other features suggesting need for admission irrespective of score -comorbidityhypoxia satts <92% PaO2 < 8KPabilateral or multilobar involvement

 

CAP

http://hacking-medschool.com/cap-emergencies

http://hacking-medschool.com/cap

http://www.cks.nhs.uk/chest_infections_adult#-294272

Inpatient Management CAP – Tayside

http://youtu.be/3CEhafxHcHI

http://youtu.be/Blwvh3nfQS0

 

  • CAP Organisms
  • Strep pneumoniae
  • Haemophilus influenzae
  • Moraxellia catarrhalis
  • Atypicals
  • Influenza A
  • Unidentified

 

  • Atypical pneumonias
  • Legionella
  • Chlamydia pneumoniae
  • Chlamydia psittaci
  • Mycoplasma
  • Coxiella burnetti (q fever)

 

Treatment

Home Rx: Amoxicillin 1g tds or doxycycline 200mg Day 1 then 100mg od for total 7 days.

If referring urgently – amoxicillin 1g oral or benzylpenicillin 1.2g IV before transfer (IV chloramphenicol 1 g if allergy).

severe or non-responding – add clarythromycinn…… edit this

 

HAP

 

Pneumocystis pneumonia

 

Influenza (respiratory)

250textbooks/influenza-virus

250textbooks/influenza-vaccine

Flu vaccination (respiratory)

250textbooks/influenza-vaccination

 

Antivirals for influenza

Tamiflu / Oseltamivir Relenza / Zanamivirneuraminidase inhibitors inhibit the replication of influenza A and B.They should be started within 48 hours of symptoms and continued 5 daysAmantadine has been available since the 1970s, but is effective only against influenza A
Use Non-vaccinated high risk individuals presenting within 48 hrs of onset of flu-like symptoms
At Risk
  • Chronic Respiratory Disease
  • Chronic Heart Disease
  • Chronic Kidney Disease
  • Chronic Liver Disease
  • Chronic Neurological Disease
  • Diabetes
  • Pregnant women
  • Over 65s years
  • Long-stay residential care
Adult dose Oseltamivir (tamiflu) 75 mg 1 capsule bd
Pregnancy Inhaled Relenza 2 blisters (10mg) bd (1xOP)If contraindicated or systemic Rx needed then use oseltamivir.Discuss risk/benefit in all cases.
Breastfeeding  Oseltamivir 75mg bd 5d(unless on Relenza for other reasons)
Children >1
  • Oseltamivir Caps
  • 1-2 <15kg 30mg bd 10 caps
  • 3-6 15-23 kg 45mg bd 10 caps
  • 7-12 23-40kg 60mg bd (2x30mg caps) 20 caps
  • >13 or >40kg 75mg bd 10 caps

Instructions for Tamiflu capsules

Children <1 Oseltamivir liquid 15mg/1ml

  • 0 to 1m 2mg/kg bd
  • 1m to 3m 2.5mg/kg bd
  • 3m to 12m 3mg/kg bd

Children under 1 Information for parents

DOH advice

This was during Tamiflu shortage – particularly Tamiflu liquid and generic Osteltamvir was recommended instead for under 1s (unlicensed)– up to date??Prescriptions should be endorsed SLS

 

Tamiflu Oral Suspension is 12 mg/ml
Oseltamivir Oral Solution is 15 mg/ml

 

Pandemic flu

http://youtu.be/OrS3VGer4Ew

http://youtu.be/utQExEhel9k

http://youtu.be/L_8MNofjd60

http://youtu.be/DcbH_x3nChA

 

Severe acute respiratory syndrome SARS (respiratory)

http://youtu.be/qXql5eFLZA0

http://hacking-medschool.com/sars

SARS factsheet cdc.gov 2004

 

Tuberculosis TB

Due to droplet transmission of Mycobacterium tuberculosis from person with active pulmonary TB.

Primary TB

Post primary TB

Diagnosis

Tuberculin test (Mantoux and Heaf)

BCG vaccination

http://youtu.be/h6z7Af-ssxw

http://youtu.be/v-6rXsJaW_o

http://youtu.be/JtyX694ubio

http://youtu.be/TQizZTX6ytw

http://youtu.be/hhdgqiAj0M0

http://youtu.be/lDrG7g96Wcw

WHO TB Factsheet

NICE CG117 Mar 11 TB

North West Medicines Information Centre Nice Bites Jul 11 Tuberculosis

Tuberculosis in the UK—time to regain control BMJ Jul 2011

Stopping routine vaccination for tuberculosis in schools BMJ 2005

Routine BCG vaccination of schoolchildren against tuberculosis stopped in 2005.

BCG vaccination will now be offered to infants in communities with an average incidence of tuberculosis of at least 40 per 100000 and to unvaccinated families from countries of similar incidence. Most people born in the UK now will not receive BCG. As most will not be exposed to mycobacteria, tuberculin testing will become more efficient in detecting infection.

NICE CG33 Clinical diagnosis and management of TB and measures for its prevention and control

 

Consolidation

Localised area of pneumonia (??) due to infection, infarction, malignancy.

Shows on X-ray as homogenous opacity with ill defined margins.

  • Clinically
  • Reduced chest movement on affected side
  • No shift of trachea or apex beat.
  • Increased vocal fremitus.
  • Reduced percussion note
  • Bronchial breathing
  • Fine or coarse crepitations
  • Increased vocal resonance
  • Whispering pectoriloquy.

 

Lobar collapse

  • Decreased movement and flattening of chest wall on side of collapse
  • Trachea shift (upper lobe collapse) and apex shifted (lower lobe collapse) towards side of collapse
  • Decreased PN
  • Reduced breath sounds +/- bronchial breathing and creps if assosciated consolidation
  • CXR shows homogenouus dense opacity. Lateral view may help locaise affected lobes.

Causes

  • Obstruction of major bronchus by Ca, FB, lymph nodes or pus
  • Lung compression by pleural effusion or pneumothorax.

 

Pleural effusion

Pleural Effusion
Transudate protein < 30g/lLDH < 200 iu/l
  • ccf
    nephrotic syndrome
    liver failure
    hypothyroidism
Exudate protein > 30g/lLDH >200 iu/l
  • Pneumonia
    TB
    pulmonary infarct
    subphrenic abcess
    meigs syndrome (ovarian fibroma)

Clinically

Decreased chest movements on side of effusion

Trachea and apex not shofted unless effusion is massive

Vocal fremitus reduced or absent

Absent or reduced BS

Absent Vocal Resonance

Bronchial breathing over upper level of effusion

Pleural Effusion medscape

http://youtu.be/fF6dbnKdpf0

http://youtu.be/bwzrnedOWF0

 

Pneumothorax

Spontaneous  tall thin young men
Secondary  COPD, asthma, lung tumour or abcess
Traumatic  rib fracures, stab wound
Iatrogenic  central lines, transbronchial biopsy
Tension  insert canula immediately into 2nd intercostal space in MCL
Clinically Sudden onset SOB and pleuritic chest pain in young thin individual.

  • Asymmetric chest findings
  • reduced expansion and air entry (breath sounds)
  • increased (hyperresonant) percussion note
  • reduced vocal resonance

 

Atelectasis

Atelectasis Medscape

http://youtu.be/VQRggeFb_J0

http://youtu.be/soNg3oVW6F8

http://youtu.be/MUT0_r6xtXs

 

Fibrosing alveolitis

Idiopathic diffuse interstitial fibrosis characterized by dyspnoea, dry cough, clubbing, fine velcro crepitations in lower lungs.

Idiopathic Pulmonary Fibrosis PUK

Fibrosing Alveolitis Pulmonary fibrosis British Lung Foundation

http://youtu.be/lUAcjuolIaQ

http://youtu.be/J6zM-KhvQuQ

http://youtu.be/YDPCm4MZYx8

 

Extrinsic allergic alveolitis

Inflammation of the alveoli and small airways (pneumonitis) due to a type III (delayed) hypersensitivity reaction to inhaled organic antigens – bird proteins, fungi and protozoa. The antigen must be small enough to be depositied in the distal lung. It becomes bound to circulating IgG forming immune complexes which then cause mast cell degranulation and inflammatory cell infiltration. Symptoms develop 4-12 hours after exposure.

Symptoms may also be subacute / insidious due to ongoing exposure, or chronic due to fibrosis.

Bird fanciers lung

Farmers lung

Humidifier fever

Maltworkers Lung

The alveolar and small airway inflammation impairs gas transfer and causes breathlessness and cough. Spirometry shows a restrictive pattern (reduction in lung volumes)

Extrinsic Allergic Alveolitis PUK

Extrinsic Allergic Alveolitis British Lung Foundation

Farmers Health Rural Health West

http://youtu.be/gl1BVcxCzj8

http://youtu.be/pcdLEu3PN78

 

Pulmonary eosinophilia

http://youtu.be/fmXqRomZSzk

Pulmonary eosinophilia umm.edu

Pulmonary eosinophilia medscape

Pulmonary eosinophilia Respiratory Reviews.com

 

Sarcoidosis

Chronic multisystem disorder characterised by development of non-caseating (cf TB) granulomas (small foci of chronic inflammation) particularly in the lungs skin and eyes.

May be asymptomatic or may present with respiratory symptoms, erythema nodosum, joint or opthalmic symptoms, hypercalcaemia.

  • Staging of pulmonary sarcoidosis
  • Stage 1 – bilateral hilar lymphadenopathywithout parenchymal disease
  • Stage 2 – BHL with non-fibrotic parenchymal disease
  • Stage 3 – Non -fibrotic parenchymal disease alone ( hilar glands have shrunk)
  • Stage 4- fibrosis and distortion of lung

http://youtu.be/1NeQmJz9DL4

http://youtu.be/fuD022heiYw

http://youtu.be/9_S95Y7J9ZY

http://youtu.be/dG_42jXthCE

Sarcoidosis BMJ 2009

sarcoid.co.uk

sila.org.uk

Other granulomatous disorders include TB Crohns aspergillosis and autoimmune disorders.

 

Aspergillosis Aspergillus fumigates
Aspergiloma Growth of Aspergillus colony in existing lung cavity
ABPA Allergic bronchopulmonary aspergillosisResistant asthma due to secondary immune reactions to Aspergillus colonisation of lungs
Invasive aspergillosis severe disseminated/destructive infection in immunocompromised – AIDS steroids neutropaenia

 

Drugs causing lung damage

Drugs causing lung damage Medscape

 

Immunological lung disease

slideshare.net immune mediated lung diseases

 

Occupational lung disease

http://youtu.be/yUaJ0ZzOsVI

http://youtu.be/2lButiuzeBI

asthma hse.gov.uk

Industrial Dust Diseases PUK

 

Pneumoconiosis

http://youtu.be/CUb9WvR2Hvs

http://youtu.be/ELPcXVv9tlg

hse.gov.uk pneumoconiosis

 

Asbestos related disease

Pleural plaques

Asbestosis

Lung Cancer

Mesthelioma

http://youtu.be/uHLeockYQJQ

http://youtu.be/W2ll4N0xnBw

http://youtu.be/ZAiudmamIYo

Mesothelioma Medscape

Mesothelioma PUK

mesothelioma.uk.com

asbestos.com mesothelioma

mesothelioma.com

 

Lung cancer

Lung Cancer Types

Non Small Cell

Respond poorly to chemo Rx – localised peripheral lesions may be cured by surgery.

Squamous Cell 35-45%

Adenocarcinoma 15%

Large cell carcinoma 10%

Carcinoid 1%

Bronchoalveolar cell carcinoma

Small cell (20%)

endocrine (APUD) derived fast growing highly malignant metastasises early

http://youtu.be/LRLk0AVZ2PM

http://youtu.be/TJmpE-Yf6hk

Lung cancer staging

http://youtu.be/fxqn7Lr7ed0

http://youtu.be/IWOzzqA3l7c

http://youtu.be/o_E3NvE7wDo

Lung Cancer Treatment

http://youtu.be/Kvmoj_xEeUs

Lung Cancer MacMillan.org

Early CDT-Lung

NICE CG24 Lung cancer Feb 2005 QRG

Therapeutic advances in non-small cell lung cancer Thorax Nov 2011

 

Pancoast tumour

Pancoast Tumour Medscape

http://youtu.be/5ItfmghpW5Q

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