AS PACES Resp Flashcards

1
Q

Clinical diagnosis of hyper expansion

A

Reduced cricosternal distance
Loss of cardiac dullness
Palpable liver edge

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2
Q

Pathophysiology of COPD

A

Chronic bronchitis / bronchiectasis with emphysema
Chronic bronchitis - cough productive of sputum on most days >3mo on consecutive years
Emphysema - histological alveolar wall destruction with airway collapse and air trapping

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3
Q

COPD - investigations

A

Bedside - PEFR, BMI, sputum MC+S
Lung function - spirometry obstructive (increased TLC and RV, FEV1:FVC <0.7, FEV1 <80% predicted
Blood - FBC, ABG (TIIRF), CRP, albumin, a1 AT levels if FH and young
Imaging - CXR, Echo (cor pulmonale), ECG

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4
Q

mMRC dyspnoea score

A
  1. SOB on vigorous exertion
  2. SOB on hurrying / stairs
  3. Walks slowly or has to stop for breath
  4. SOB <100 yrd / few min
  5. Too breathless to leave house
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5
Q

COPD exacerbation - scale

A

Mild - FEV1 >80% but FEV1/FVC <0.7
Mod - FEV1 50-79%
Sev - FEV1 30-49%
V. Sev - FEV1 <30%

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6
Q

COPD management

A

Principal therapies: LAMA/SAMA, SABA/LABA, corticosteroids
Other: theophylline, carbocysteine (mycolytic)
Home emergency pack
LTOT: aim PaO2 >8 for >15h/day, but be non smoker

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7
Q

Mx Acute Exacerbation COPD

A
  1. Controlled O2: sit up, 24% O2 venturi mask target SpO2 88-92%. Aim PaO2 >8 and increased in PCO2 of no more then 1.5 kPa
  2. Nebulised (air driven): Salbutamol 5mg/4h; Ipratropium 0.5mg/6h
  3. Steriods: Hydrocortisone 200mg IV; Pred 40mg PO 7-14d
  4. Abx: Doxy 200mg PO STAT + 100mg OD PO 5/7
  5. Consider aminophylline IV
  6. Consider NIV
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8
Q

Asthma: Ix

A
Bedside: PEFR
Blood: FBC (eosinophilia), IgE, 
CXR: hyperinflation
Spirometry: obstructive (reduced FEV1, increased RV, improvement with B agonist trial)
PEFR diary: diurnal variation
Atopy: skin sprick test, RAST
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9
Q

Severe asthma attack

A

PEFR <50%
Can’t complete sentence in one breath
RR >25
Hr >110

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10
Q

Life threatening asthma attack

A
PEFR <33%
SpO2 <92%, PCO2 >4.6 kPa, PaO2 <8kPa
Cyanosis
Hypotension
Exhaustion / Confusion
Silent chest, poor resp effort
Tachy/brady/arrythmias
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11
Q

Acute Asthma Attack: Mx

A
  1. Sit-up, 100% O2 via non-rebreathable mask (aim 94-98%), nebulised salbutamol 5mg and ipratropium 0.5mg, hydrocortisone 100mg IV
  2. ?Inform ITU, MGSO4 2g IVI over 20 min, nebulised salbutamol every 15min (monitor ECG)
  3. If improving: monitor SaO2, PEFR, continue pred 50mg OD 5/7; nebulised salbutamol /4hrs
  4. If no improvement: nebulised salbutamol /15min, continue ipratropium 0.5mg 4-6hrs, MgSO4 2g IVI over 20 min, salbutamol IVI 3-20ug/min), consider aminophylline, ITU
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12
Q

DDx pulmonary fibrosis

A

Upper: aspergillosis, pneumoconiosis (coal, silica), extrinsic allergic alveolitis, TB
Lower: sarcoid, toxins, aspestosis, IPF, RA, SLE, SS, Sjogren’s
Drugs –> Bleomycin, Amiodarone, Nitrofurantoin, Sulfasalazine, Methotrexate

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13
Q

Ix Pulmonary Fibrosis

A
Bedside: PEFR, ECG (RVH)
Blood: FBC (anaemia), ABG, ESR/CRP (+ IPF), ANA (30%), RF (10%)
CTD: C3/C4, CCP, scl-70, centromere
Sarcoid: ACE, Ca
CXR / HRCT (firbosis, honeycomb)
Spirometry: restrictive
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14
Q

IPF: Mx

A
MDT
Smoking cessation
LTOT
Pulmonary rehab
Symptoms: Anti tussives (codeine), CCF 
Surgical: Lung Tx
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15
Q

Causes of bronchiectasis

A

Congenital: CF, PCD/Kartagener’s, Hypogammaglobulinaemia
Acquired: Idiopathic, post infectious (TB, pertussis, measles), obstruction (FB, tumour), other (RA, IBD, amyloidosis)

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16
Q

Bronchiectasis Ix

A

Bedside: PEFR, dipstick, sputum MC+S
Blood: FBC, serum Ig, FR/antiCCP
CXR - tramlines and ring shadows (bunch of grapes)
HRCT - signet ring sign (thickened dilated bronchi + smaller adjacent vascular budge
Spirometry - obstructive
Bronchoscopy + biopsy

17
Q

CF: pathophysiology

A
1/25 carrier, AR d508 CFTR chr 7
Decreased luminal Cl secretion and increased Na reabsorption leads to very viscous secretions = bronchiectasis, DM, malabsorption, gallstones/cirrhosis, infertility
Sweat test = pilocarpine + Na/CL >60mM
Immunoreactive trypsinogen (neonates), faecal elastase (pancreatic exocrine function)
18
Q

CF pt: Mx

A
MDT
Physio 
Abx
Mucolytics 
Vaccination
Heart lung Tx
Creon + ADEK supplements ± Insulin
Fertility
DEXA
19
Q

Kartagener’s syndrome triad

A

Situs inversus + Chronic sinusitis + Brnochiectasis

20
Q

Young’s Syndrome triad

A

Bronchiectasis + Rhinosinusitis + Azoospermia

21
Q

Light’s criteria for Exudative Effusion

A

Effusion:serum protein ratio >0.5
Effusion:serum LDH ratio >0.6
Effusion LDH =0.6xULN

22
Q

Complications of Lung Ca

A

Invasion: SVCO, RLNP, Pancoast, dermatomyositis

Paraneoplastic

23
Q

Pneumonectomy vs Lobectomy

A

Lateral thoracotomy scar - look
Pneumonectomy: tracheal + apex shift to abnormal side - reduced expansion, dull percussion, NO breath sounds
Lobectomy: tracheal shift to abnormal side, reduced expansion, dull percussion, reduced breath sounds
Indications: 90% non-disseminated bronchial Ca, bronchiectasis, COPD, TB

24
Q

Lung Ca: pathology

A

NSCLC 80% (SCC 35%, smokers, central, ++Ca; AC 25%, F, non smokers, peripheral, 80% present mets; LCLC 10%
SCLC 20% (Highly related to smoke, central, paraneoplastic)

25
Q

Lung Ca: Paraneoplastic syndromes

A
AHD: SIADH (euvolaemic hyponatraemia)
ACTH: Cushing's syndrome
Serotonin: Carcinoid (flushing, diarrhoea)
Dermatomyositis 
Cerebrllar degeneration
Acanthosis nigricans
Thrombophlebitis migrans
26
Q

Lung Ca Ix

A

Blood: FBC, U&E, LFTs, Bone profile
CXR: coin lesion, effusion, consolidation/collapse, hilar LN
Contrast enhanced volumetric CT thorax
Percutaneous FNA, endoscopic transbronchial biopsy
Staging: CT, PET
Lung function tests to assess suitability for surgery

27
Q

SIRS criteria

A

Temperature >38 or <36
HR >90
RR >20 / PaCO2 <4.6 kPa
WCC >12 or <4

28
Q

SE of TB meds

A

Rifampicin - orange secretions
Isionizid - peripheral sensory neuropathy
Ethambutol - optic neuritis
Pyrazinamide - hepatitis

29
Q

Tuberculin skin test in TB

A

Intradermal injection of purified protein derivative
Induration measured @48-72h
False +ve = BCG, prev exposure, other mycobacteria
False -ve = HIV, sarcoid, lymphoma

30
Q

DDx Pulmonary Fibrosis

A

ESCHART (upper) RASCO (lower)

EEA, Sarcoid, Coal pneumoconiosis, Histiocytosis, Ank Spond, Rx, TB

RA, Asbestosis, Scleroderma, Cryptogenic (IPF), Drugs (methotrexate, nitrofurantoin, bleomycin, amiodarone)