r e s p i r a t o r y Flashcards
describe the classification of pneumonia anatomically
Bronchopneumonia
Patchy consolidation of different lobes
Lobar Pneumonia
Fibrosuppurative consolidation of a single lobe
Congestion → red → grey → resolution
describe the aetiological classification of pneumonia and causative microbes
Community Acquired Pneumonia
Pneumococcus, mycoplasma, haemophilus
S. aureus, Moraxella, Chlamydia, Legionella
Viruses: 15%
Hospital Acquired Pneumonia
>48hrs after hospital admission
Gm-ve enterobacteria, S. aureus
Pneumonia
Aspiration pneumonia
immunocompromised = usual suspects PCP, TB, fungi, CMV/HSV
what increases risk of aspiration
↑ Risk: stroke, bulbar palsy, ↓GCS, GORD, achalasia
what are the sx of pneumonia
Fever, rigors Malaise, anorexia Dyspnoea Cough, purulent sputum, haemoptysis Pleuritic pain
what are signs of pneumonia
↑RR, ↑ HR Cyanosis Confusion Consolidation ↓ expansion Dull percussion Bronchial breathing ↓ air entry Crackles Pleural rub ↑VR
what investigations are required in pneumonia
Bloods: FBC, U+E, LFT, CRP, culture, ABG (if ↓SpO2) Urine: Ag tests (Pneumococcal, Legionella) Sputum: MC&S Imaging: CXR infiltrates, cavities, effusion Special Paired sera Abs for atypicals Mycoplasma, Chlamydia, Legionella Immunofluorescence (PCP) BAL Pleural tap
how do you assess severity of pneumonia
Confusion (AMT ≤ 8) Urea >7mM Resp. rate >30/min BP <90/60 ≥65
score 0-1 - home rx
score 2 hospital rx
score 3 or more = consider ITU
describe the general management for pneumonia
Abx O2: PaO2≥8, SpO2 94-98% Fluids Analgesia Chest physio Consider ITU if shock, hypercapnoea, hypoxia F/up @ 6wks ̄c CXR Check for underlying Ca
what are the abx used in mild, moderate, severe CAP and PCP
amoxicillin (or and clarithromycin) for mild/ moderate
severe = co amoxiclav and clarithromycin (add fluclox if staph suspected)
atypical = PCP - tetracycline
what abx are used in HAP
mild = co amoxiclav severe = tazocin w vancomycin w gentamicin
what abx are used in aspiration pneumonia
co amoxiclav
what vaccination is given against pneumonia and what are the indications for this
pneumovax
≥65yrs
Chronic HLKP failure or conditions
DM
Immunosuppression: hyposplenism, chemo, HIV
what are the contraindications to pneumovax
CI: P, B, fever
what are the complications of pneumonia
resp failure = type 1 and type 2 . manage with oxygen therapy, ventilation
hypotension = dehydration and septic vasodilation. management 250ml fluid challenge over 15min, ITU for inotropes if refractory, central line with iv fluids if no improvement
AF - usually resolves. give digoxin or b-blocker for rate control
pleural effusion = exudate - tap and send for MCS, cytology and chemistry
empyema = USS guided chest drain with abx
lung abscess
sepsis
what are the complications of pneumonia
resp failure = type 1 and type 2 . manage with oxygen therapy, ventilation
hypotension = dehydration and septic vasodilation. management 250ml fluid challenge over 15min, ITU for inotropes if refractory, central line with iv fluids if no improvement
describe the pathophysiology of bronchiectasis
Chronic infection of bronchi/bronchioles → permanent dilation
Retained inflammatory secretions and microbes → airway damage and recurrent infection
which organisms affect pt with bronchiectasis
H. influenza
Pneumococcus S. aureus
Pseudomonas
what are the causes of bronchiectasis
causes = idiopathic
congenital = CF, kartagener’s, young’s syndrome
post infectious = measles, pertussis, pneumonia, TB, bronchiolitis
what are the sx of bronchiectasis
Persistent cough ̄c purulent sputum
Haemoptysis (may be massive)
Fever, wt. loss
what are the signs of bronchiectasis
clubbing Coarse inspiratory creps Wheeze Purulent sputum Cause Situs inversus (+ PCD = Kartagener’s syn.) Splenomegaly: immune deficiency
what are the complications of bronchiectasis
Pneumonia Pleural effusion Pneumothorax Pulmonary HTN Massive haemoptysis Cerebral abscess Amyloidosis
what investigations are required
Sputum MCS
Blood: Se Ig, Aspergillus precipitins, RF, α1-AT level
Test Ig response to pneumococcal vaccine
CXR: thickened bronchial walls (tramlines and rings)
Spirometry: obstructive pattern
HRCT chest
Dilated and thickened airways
Saccular dilatations in clusters ̄c pools of mucus
Bronchoscopy + mucosal biopsy
Focal obstruction
PCD
CF sweat test
how is bronchiectasis managed
Chest physio: expectoration, drainage, pulm. rehab
Abx for exacerbations: e.g. cipro for 7-10d
Bronchodilators: nebulised β agonists
Treat underlying cause
CF: DNAase
ABPA: Steroids
Immune deficiency: IVIg
Surgery may be indicated in severe localised disease
describe the pathophysiology behind CF
Mutation in CFTR gene on Chr 7 (commonly ∆F508)
→ ↓ luminal Cl secretion and ↑ Na reabsorption →
viscous secretions.
In sweat glands, ↓ Cl and Na reabsorption → salty sweat
what is the inheritance pattern being CF
autosomal recessive
what are the clinical features of CF
Neonate
FTT
Meconium ileus
Rectal prolapse
Children / Young Adults
Nose: nasal polyps, sinusitis
Resp: cough, wheeze, infections, bronchiectasis,
haemoptysis, pneumothorax, cor pulmonale
GI:
Pancreatic insufficiency: DM, steatorrhoea Distal Intestinal Obstruction Syndrome
Gallstones
Cirrhosis (2O biliary)
Other: male infertility, osteoporosis, vasculitis
what are the clinical signs associated with CF
Clubbing ± HPOA
Cyanosis
Bilateral coarse creps
what are the common resp organisms in CF
Early
S. aureus
H. influenza
Late
P. aeruginosa: 85% B. cepacia: 4%
describe how CF is dx
sweat test: Na and Cl > 60mM
Genetic screening for common mutations
Faecal elastase (tests pancreatic exocrine function)
Immunoreactive trypsinogen (neonatal screening)
describe the lx required in CF
Bloods: FBC, LFTs, clotting, ADEK levels, glucose TT Sputum MCS
CXR: bronchiectasis
Abdo US: fatty liver, cirrhosis, pancreatitis
Spirometry: obstructive defect
Aspergillus serology / skin test (20% develop ABPA)
how is CF managed
General MDT: physician, GP, physio, dietician, specialist nurse Chest Physio: postural drainage, forced expiratory techniques Abx: acute infections and prophylaxis Mucloytics: DNAse Bronchodilators Vaccinate GI Advanced Lung Disease O2 Diuretics (Cor pulmonale) NIV Heart/lung transplantation
describe the sx of lung Ca
Cough and haemoptysis Dyspnoea Chest pain Recurrent or slow resolving pneumonia Anorexia and ↓wt. Hoarseness
what are the signs of lung Ca
Chest Consolidation Collapse Pleural effusion General Cachexia Anaemia Clubbing and HPOA (painful wrist swelling) Supraclavicular and/or axillary LNs Metastasis Bone tenderness Hepatomegaly Confusion, fits, focal neuro Addison’s
what are the complications of lung Ca
Local Recurrent laryngeal N. palsy Phrenic N. palsy SVC obstruction Horner’s (Pancoast’s tumour) AF Paraneoplastic Endo ADH → SIADH ( euvolaemic ↓Na+) ACTH → Cushing’s syndrome Serotonin → carcinoid (flushing, diarrhoea) PTHrP → 1O HPT (↑Ca2+, bone pain) – SCC Rheum Dermatomyositis / polymyositis Neuro Purkinje Cells (CDR2) → cerebellar degeneration Peripheral neuropathy Derm Acanthosis nigricans (hyperpigmented body folds) Trousseau syndrome: thrombophlebitis migrans
Metastatic Pathological # Hepatic failure Confusion, fits, focal neuro Addison’s
what are the investigations for lung Ca
bloods = FB, U+E, Ca, LFTs cytology = sputum, pleural fluid
Imaging
CXR. Coin lesion, Hilar enlargement
Consolidation, collapse Effusion
Bony secondaries
Contrast-enhanced Volumetric CT
Staging: lower neck, chest, upper abdomen
Consider CT brain
PET-CT: exclude distant mets
Radionucleotide bone scan
Biopsy
Percutaneous FNA: peripheral lesions and LNs
Bronchoscopy: biopsy and assess operability
what is type 1 resp failure
PaO2 <8KPa and PaCO2 <6KPa
V/Q mismatch and diffusion failure
what is type 2 resp failure
PaO2 <8KPa and PaCO2 >6KPa
Alveolar hypoventilation ± V/Q mismatch
what are the causes of V/Q mismatch
Vascular PE PHT Pulmonary Shunt (R → L) Asthma (early) Pneumothorax Atelectasis
what are the obstructive causes of alveolar hypoventilation
COPD Asthma Bronchiectasis Bronchiolitis Intra- and Extra-thoracic (Ca, LN, epiglottitis...)
what are the restrictive causes of alveolar hypoventilation
↓ drive: CNS sedation, trauma, tumour NM disease: cervical cord lesion, polio, GBS, MG Chest: flail, kyphoscoliosis, obesity Fluid and fibrosis
what are the causes of diffusion failure
Fluid Pulmonary oedema Pneumonia Infarction Blood Fibrosis
how do you manage type 1 and type 2 resp failure
Type 1
Give O2 to maintain SpO2 94-98%
Assisted ventilation if PaO2<8KPa despite 60% O2
Type 2
Controlled O2 therapy @ 24% O2 aiming for SpO2 88-92% and a PaO2 >8kPa
Check ABG after 20min
If PaCO2 steady or lower can ↑ FiO2 if necessary
If PaCO2 ↑>1.5KPa and pt. still hypoxic, consider
NIV or respiratory stimulant (e.g. doxapram)
what are the various types of oxygen masks and how much oxygen do they deliver
Nasal Prongs: 1-4L/min = 24-40% O2 Simple Face Mask Non-rebreathing Mask Reservoir bag allows delivery of high concentrations of O2. 60-90% at 10-15L Venturi Mask = Provide precise O2 concentration at high flow rates Yellow: 5% White: 8% Blue: 24% Red: 40% Green: 60%
what is the asthma
Episodic, reversible airway obstruction due to bronchial hyper-reactivity to a variety of stimuli.
describe the pathophysiology of asthma
Mast cell-Ag interaction → histamine release
Bronchoconstriction, mucus plugs, mucosal swelling
what are the causes asthma
Atopy T1 hypersensitivity to variety of antigens Dust mites, pollen, food, animals, fungus Stress Cold air Viral URTI Exercise Emotion Toxins Smoking, pollution, factory Drugs: NSAIDS, β-B
wear are the sx of asthma
ough ± sputum (often at night)
Wheeze
Dyspnoea
Diurnal variation ̄c morning dipping
what are the questions to ask in hx for asthma
Precipitants Diurnal variation Exercise tolerance Life effects: sleep, work Other atopy: hay fever, eczema Home and job environment
what are the signs of asthma
Tachypnoea, tachycardia Widespread polyphonic wheeze Hyperinflated chest ↓ air entry Signs of steroid use
what are the ddx for asthma
Pulmonary oedema (cardiac asthma) COPD
what investigations are required
Bloods FBC (eosinophila) ↑IgE Aspergillus serology CXR: hyperinflation Spirometry Obstructive pattern ̄c FEV1:FVC < 0.75 ≥15% improvement in FEV1 ̄c β-agonist PEFR monitoring / diary Diurnal variation >20% Morning dipping Atopy: skin-prick, RAST
describe general measures behind management asthma
General Measures: TAME
Technique for inhaler use
Avoidance: allergens, smoke (ing), dust
Monitor: Peak flow diary (2-4x/d) Educate
Liaise ̄c specialist nurse Need for Rx compliance Emergency action plan
describe the drug ladder for chronic asthma
- SABA
- SABA + ICS (budesonide)
- SABA + ICS + LTRA
- increasing dose of ICS
describe the acute management of asthma
Sit-up
2. 100% O2 via non-rebreathe mask (aim for 94-98%) 3. Nebulised salbutamol (5mg) and ipratropium (0.5mg) 4. Hydrocortisone 100mg IV or pred 50mg PO (or both) 5. Write “no sedation” on drug chart
back to back nebs, consider aminophylline
if lifethreatening = inform ITU, MgSO4 IVI over 20 min, nebs salbutamol every 15 mins monitor ECG
what defines severe acute asthma
any one of PEFR <50% RR>25 HR >110 Can’t complete sentence in one breath
what defines life threatening asthma
any one of PEFR <33% SpO2 <92%, PCO2 >4.6kPa, PaO2 <8kPa Cyanosis Hypotension Exhaustion, confusion Silent chest, poor respiratory effort Tachy-/brady-/arrhythmias
what defines fatal acute asthma
PCO2 increasing
ddx for asthma
pneumothorax
acute exacerbation of COPD
pulmonary oedema
when do you discharge pt after acute asthma attack
Been stable on discharge meds for 24h
PEFR > 75% ̄c diurnal variability < 20%
what things are required in pt with asthma as part of discharge plan
TAME pt.
PO steroids for 5d
GP appointment w/i 1 wk.
Resp clinic appointment w/i 1mo
how are pleural effusions classified
Effusion protein < 25g/L = transudate
Effusion protein >35g/L = exudate
what are the exudative causes of pleural effusions
Exudates: ↑ capillary permeability Infection: pneumonia, TB Neoplasm: bronchial, lymphoma, mesothelioma Inflammation: RA, SLE Infarction
what are the transudatice causes of pleural effusions
↑ capillary hydrostatic or ↓ oncotic pressure
CCF
Renal failure
↓ albumin: nephrosis, liver failure, enteropathy
Hypothyroidism
how do pt with pleural effusion present
Asymptomatic
Dyspnoea
Pleuritic chest pain
where the signs of pleural effusion
Chest
Tracheal deviation away from effusion ↓ expansion
Stony dull percussion
↓ air entry
Bronchial breathing just above effusion
↓VR Associated disease
Ca: cachexia, clubbing, HPOA, LNs, radiation burn, radiation tattoo
Chronic liver disease
Cardiac failure
RA, SLE
Hypothyroidism
what investigations are required in pleural effusions
Blood: FBC, U+E, LFT, TFT, Ca, ESR CXR Blunt costophrenic angles Dense shadow ̄c meniscus Mediastinal shift away Cause: coin lesion, cardiomegaly US: facilitates tapping Volumetric CT Diagnostic Tap Percuss upper boarder and go 1-2 spaces below Infiltrate down to pleura ̄c lignocaine. Aspirate ̄c 21G needle Send for Chemistry: protein, LDH, pH, glucose, amylase Bacteriology: MCS, auramine stain, TB culture Cytology Immunology: SF, ANA, complement
how do you manage pleural effusion
Rx underlying cause
May use drainage if symptomatic (≤2L/24h)
Repeated aspiration or ICD
Chemical pleurodesis if recurrent malignant effusion Persistent effusions may require surgery
what is usually cause for PE
Usually arise from DVTs in proximal leg or iliac veins
Rarely:
Right ventricle post MI
Septic emboli in right sided endocarditis
what are the rx factors associated with PE
SPASMODICAL Sex:F Pregnancy Age:↑ Surgery (classically 10d post-op straining at stool) Malignancy Oestrogen: OCP/HRT DVT/PE previous Hx Immobility Colossal size Antiphospholipid Abs Lupus Anti-coagulant
how do pt with PE present
Dyspnoea
Pleuritic pain
Haemoptysis
Syncope
what are the signs associated with PE
ever Cyanosis Tachycardia, tachypnoea RHF: hypotension, ↑JVP , loud P2 Evidence of cause: DVT
what investigations are required in PE
Bloods: FBC, U+E, clotting, D-dimers
ABG: normal or ↓PaO2 and ↓PaCO2, ↑pH
CXR: normal or oligaemia, linear atelectasis
ECG: sinus tachycardia, RBBB, right ventricular strain
(inverted T in V1-V4)
S1, Q3, T3 is rare
Doppler US: thigh and pelvis (+ve in 60%)
CTPA + venous phase of legs and pelvis
85-95% sensitivity
How is PE dx
ssess probability using Wells’ Score 2. Low-probability → perform D-dimers Negative → excludes PE Positive → CTPA 3. High probability → CTPA
what things are done to prevent or reduce risk of PE
Risk assessment for all pts
TEDS
Prophylactic LMWH
Avoid OCP/HRT if @ risk
describe the acute management of PE
- oxygen via non rebreather mask
- morphine with metoclopramide
- alteplase bolus stat if critically ill with massive PE
- LMWH = enoxaprin
- SBP reduced = fluids, inotropes
what is a pneumothorax
Accumulation of air in the pleural space ̄c 2O lung collapse
what is a tension pneumothorax
air enters pleural cavity through one-way valve
and cannot escape → mediastinal compression.
what are the causes of pneumothorax
Spontaneous 1O: no underlying lung disease Young, thin men (ruptured subpleural bulla) Smokers 2O: underlying lung disease COPD Marfan’s, Ehler’s Danlos Pulmonary fibrosis, sarcoidosis Trauma Penetrating Blunt ± rib #s
what are the investigations required in pneumothorax
ABG
US
CXR (expiratory film may be helpful)
Translucency + collapse (2cm rim = 50% vol loss) Mediastinal shift (away from PTX)
Surgical emphysema
Cause: rib #s, pulmonary disease (e.g. bullae)
what is the acute management of a pneumothorax
Resuscitate pt. NoCXR
Large bore Venflon into 2nd ICS, mid-clavicular line
Insert ICD
what is COPD
Airway obstruction: FEV1 <80%, FEV1:FVC <0.70
Chronic bronchitis: cough and sputum production on
most days for 3mo of 2 successive years.
Emphysema: histological diagnosis of enlarged air
spaces distal to terminal bronchioles ̄c destruction of alveolar walls.
what are the causes of COPD
Smoking
Pollution
α1ATD
what are the sx of COPD
Cough + sputum
Dyspnoea
Wheeze
Wt. loss
what are the clinical signs seen in COPD
Tachypnoea Prolonged expiratory phase Hyperinflation Wheeze Cyanosis Cor pulmonale: ↑JVP , oedema, loud P2
destine pink puffers vs blue bloaters in COPD
pink puffers = emPhysema =
blue bloaters = chronic bronchitis
describe pink puffers COPD
↑ alveolar ventilation → breathless but not cyanosed
Normal or near normal PaO2
Normal or low PaCO2
Progress → T1 respiratory failure
describe blue bloaters COPD
alveolar ventilation → cyanosed but not breathless
↓PaO2 and ↑ PaCO2: rely on hypoxic drive
Progress → T2 respiratory failure and cor pulmonale
What score is used in COPD for SOB and what are the stages
mMRC Dyspnoea Score
- Dyspnoea only on vigorous exertion
- SOB on hurrying or walking up stairs
- Walks slowly or has to stop for breath
- Stops for breath after <100m / few min
- Too breathless to leave house or SOB on dressing
what are the complications of COPD
Acute exacerbations ± infection Polycythaemia Pneumothorax (ruptured bullae) Cor Pulmonale Lung carcinoma
what Lx are required in COPD and would each show
Bloods: FBC (polycythaemia), α1-AT level, ABG CXR
Hyperinflation (> 6 ribs anteriorly) Prominent pulmonary arteries
Peripheral oligaemia
Bullae
ECG:
R atrial hypertrophy: P pulmonale RVH, RAD
Spirometry: FEV1 <80%, FEV1:FVC <0.70, ↑TLC, ↑RV Echo: PHT
describe the management of chronic COPD
General Measures
Stop smoking
Specialist nurse
Nicotine replacement therapy
Bupropion, varenicline (partial nicotinic agonist) Support programme
Pulmonary rehabilitation / exercise Rx poor nutrition and obesity
Screen and Mx comorbidities
e.g. cardiovasc, lung Ca, osteoporosis Influenza and pneumococcal vaccine
Review 1-2x/yr
Air travel risky if FEV1<50%
Mucolytics
Consider if chronic productive cough
E.g. Carbocisteine (CI in PUD)
Breathlessness and/or exercise limitation
SABA and/or SAMA (ipratropium) PRN
SABA PRN may continue at all stages
Exacerbations or persistent breathlessness
FEV1 ≥50%: LABA or LAMA (tiotropium) (stop SAMA)
FEV1 <50%: LABA+ICS combo or LAMA
Persistent exacerbations or breathlessness
LABA+LAMA+ICS
Roflumilast / theophylline (PDIs) may be considered
Consider home nebs
when is LTOT in COPD pt indicated
Aim: PaO2 ≥8 for ≥15h / day (↑ survival by 50%)
Clinically stable non-smokers ̄c PaO2 <7.3 (stable on
two occasions >3wks apart)
PaO2 7.3 – 8 + PHT / cor pulmonale / polycythaemia /
COPD
nocturnal hypoxaemia Terminally ill pts.
name a surgical option in COPD pts
lung volume reduction
describe acute management of COPD exacerbation
4% O2 via Venturi mask: SpO2 88-92%,
Vary FiO2 and SpO2 target according to ABG
Aim for PaO2 >8 and ↑ in PCO2 of <1.5kPa
Nebulised Bronchodilators
Air driven ̄c nasal specs
Salbutamol 5mg/4h
Ipratropium 0.5mg/6h
Steroids (IV and PO)
Hydrocortisone 200mg IV
Prednisolone 40mg PO for 7-14d
Abx
If evidence of infection
Doxy 200mg PO STAT then 100mg OD PO for 5d
NIV if no response = consider back to back nebs very 15 mins
how does ILD present, clinical characteristics
Dyspnoea
Dry cough
Abnormal CXR / CT
Restrictive Spirometry
what are the causes of ILD
Environmental: asbestosis, silicosis Drugs: BANS ME Bleomycin, Busulfan Amiodarone Nitrofurantoin Sulfasalazine MEthotrexate, MEthysergide Hypersensitivity: EAA Infection: TB, viral, fungi can be idiopathic = IPF
what are systemic disease associated with ILD
sarcoidosis
RA
SLE, Sjogren’s
UC, AS
what are the causes of ILD by location ? upper zone?
A PENT Aspergillosis : ABPA Pneumoconiosis: Coal, Silica Extrinsic allergic alveolitis Negative, sero-arthropathy TB
what are the causes of ILD by location ? lower zone?
STAIR Sarcoidosis (mid zone) Toxins: BANS ME Asbestosis Idiopathic pulmonary fibrosis Rheum: RA, SLE, Scleroderma, Sjogren’s, PM/DM
what are the sx of IPF
Dry cough Dyspnoea Malaise, wt. loss Arthralgia OSA Signs
What are the signs of IPF
Cyanosis
Clubbing
Crackles: fine, end-inspiratory
what are the complications associated with IPF
↑ risk Ca lung
Type 2 respiratory failure and cor pulmonale
Lx required and results expected in IPF
Bloods ↑CRP ↑Ig ANA+ (30%) RF+ (10%) ABG: ↓PaO2, ↑PaCO2
CXR ↓ lung volume Bilat lower zone retic-nod shadowing Honeycomb lung HRCT Shows similar changes to CXR More sensitive
Spiro
Restrictive defect ↓ transfer factor
how is IPF managed
Supportive care Stop smoking Pulmonary rehabilitation O2 therapy Palliation Rx symptoms of heart failure Lung Tx offers only cure
name 3 industrial lung diseases and their rx factors
coal workers pneumoconiosis
silicosis
asbestosis
name 3 industrial lung diseases and their rx factors
coal workers pneumoconiosis
silicosis
asbestosis
asbestosis has increased risk of …
mesothelioma
how does asbestosis present and what changes are seen on CXR. how is it dx
Chest pain, wt. loss, clubbing, recurrent effusions, dyspnoea.
CXR: pleural effusions, thickening
Dx by histology of pleural biopsy
<2yr survival
what is pulmonary HTN
what is pulmonary HTN
PA pressure greater than 25mmHg
what are the causes of pulmonary HTN
left heart disease = mitral stenosis, mitral regurgitation, LVF, left to right shunt
lung parenchymal disease = COPD, asthma, ILD, CF, bronchiestasis
pulmonary vascular disease = idiopathic pulmonary HTN, sickle cell, PE, portal HTN
hypoventilation - morbid obesity, MND, polio
describe the mechanism of pulmonary HTN via lung parenchyma disease
Chronic hypoxia → hypoxic vasoconstriction Perivascular parenchymal changes
Lx for pulmonary htn
ECG
P pulmonale RVH
Echo
Velocity of tricuspid regurgitation jet
Right atrial or ventricular enlargement Ventricular dysfunction
Valve disease
Right heart catheterisation: gold standard
Mean pulmonary artery pressure
what is cor pulmonale
RHF due to chronic PHT
what are the sx of cor pulmonale
Dyspnoea Fatigue
Syncope
what are the signs seen in cor pulmonale
↑ JVP ̄c prominent a wave 2. Left parasternal heave
- LoudP2±S3
- Murmurs
- Pulsatile hepatomegaly
- Fluid: Ascites + Peripheral oedema
lx for cor pulmonale
Bloods: FBC, U+E, LFTs, ESR, ANA, RF ABG: hypoxia ± hypercapnoea
CXR
ECG: P pulmonale + RVH
Echo: RVH, TR, ↑ PA pressure
Spirometry
Right heart catheterisation
how is cor pulmonale managed
Rx underlying condition ↓ pulmonary vascular resistance LTOT CCB: e.g. nifedipine Sildenafil (PDE-5 inhibitor) Prostacycline analogues Bosentan (endothelin receptor antagonist)
Cardiac failure
ACEi + β-B (caution if asthma) Diuretics
Heart-Lung Tx
what is obstructive sleep apnoea
Intermittent closure/collapse of pharyngeal airway → apnoeic episodes during sleep.
rx for obstructive sleep apnoea
Obesity Male Smoker EtOH Idiopathic pulmonary fibrosis Structural airway pathology: e.g. micrognathia NM disease: e.g. MND Ix
Lx for obstructive sleep apnoea
SpO2
Polysomnography is diagnostic
how is it managed
Wt. loss
Avoid smoking and EtOH
CPAP during sleep
what are the clinical features of obstructive sleep apnea nocturnal
Snoring
Choking, gasping, apnoeic episodes
what are the clinical features of sleep apnoea day time
Morning headache
Somnolence
↓ memory and attention
Irritability, depression
complications of sleep apnoea
Pulmonary hypertension
Type 2 respiratory failure
Cor pulmonale
how is sleep apnoea managed
wt. loss Stop smoking CPAP @ night via a nasal mask Surgery to relieve pharyngeal obstruction Tonsillectomy
advice and management of pt who wants to stop smoking
Ask: enquire as to smoking status
Advise: best way to stop is with support and medication
Act: provide details of where to get help
E.g. NHS stop smoking helpline
Refer to specialist stop smoking service
Nicotine replacement
Gum or Patches
Varenicline: selective partial nicotine receptor agonist
bupropion