Passmed Respiratory Mushkies Flashcards
Resp causes of clubbing?
- Infection = TB
- Pyogenic conditions = CF, bronchiectasis, abscess, empyema
- Malignany = cancer, mesothelioma
- Fibrosing alveolitis
- Asbestosis
Response to treatment and recovery of pneumonia timeframes?
- Week 1 = fever should resolve
- Week 4 = CP and sputum should have significantly reduced
- Week 6 = cough and SOB should have reduced
- Month 3 = most sx should have resolved except for tiredness
- Month 6 = should be returned to normal
CURB-65?
- Confusion (AMTS <=10)
- Urea >7mmol/l
- RR >= 30/min
- BP = SBP <90mmHg and/or DBP 60mmHg
- Aged >=65y/o
CURB-65 interpretation?
- CURB >=2 –> hospital
2. CURB >=3 –> intensive care
Pneumonia Ix?
- Bedside = sputum cultures, urinary antigens
- Blood cultures, CRP
- Imaging = CXR
Mx of low severity CAP?
Amoxicillin 5 days
Most common surgical acid base disorder?
Metabolic acidosis
Pneumonia in Birdkeepers?
Chlamydia Psittaci
C. psittaci classical picture?
- Resp infection + acute/chronic conjunctivitis
2. Can lead to multi-organ failure
Mx of C.psittaci?
- 1st line = tetracyclines e.g. doxycycline
2. 2nd line = macrolides e.g. erythromycin
Are abx recommended for uncomplicated sinusitis?
No
Dx of mesothelioma?
Histology following a thoracoscopy
Mesothelioma defn?
Malignancy of the mesothelial cells of the pleura
Mesothelioma prognosis?
Median survival 12m
Tram-lines on CXR?
Bronchiectasis (indicate dilated bronchi due to peribronchial inflammation and fibrosis)
Large amounts of purulent sputum?
Bronchiectasis
O2 sats target in COPD?
88-92%
O2 mx of CPOD pts?
- Prior to availability of blood gases, use a 28% Venturi mask at 4 l/min and aim for an oxygen saturation of 88-92% for patients with risk factors for hypercapnia but no prior history of respiratory acidosis
- Adjust target range to 94-98% if the pCO2 is normal
Pneumothorax classification?
- Primary = no underlying disease
2. Secondary = underlying disease
Primary pneumothorax mx?
- If rim of air is < 2cm and the pt is not SOB then discharge considered
- Otherwise aspiration should be attempted
- If this fails (defined as > 2 cm or still short of breath) then a chest drain should be inserted
- Patients should be advised to avoid smoking to reduce the risk of further episodes - the lifetime risk of developing a pneumothorax in healthy smoking men is around 10% compared with around 0.1% in non-smoking men
Secondary pneumothorax mx?
- If the patient is > 50 years old and the rim of air is > 2cm and/or the patient is SOB then a chest drain should be inserted.
- Otherwise aspiration should be attempted if the rim of air is between 1-2cm. If aspiration fails (i.e. pneumothorax is still greater then 1cm) a chest drain should be inserted. 3. All patients should be admitted for at least 24 hours
- If the pneumothorax is less the 1cm then the BTS guidelines suggest giving oxygen and admitting for 24 hours
Adult asthma Mx stages?
- SABA
- SABA + LD ICS
- SABA + LD ICS + LTRA
- SABA + LD ICS + LABA +/- LTRA
- SABA +/- LTRA + MART
- SABA +/- LTRA + medium dose inhaled MART
- SABA +/- LTRA + high dose ICS/theophylline/professional
What is MART?
- Maintenance and reliever therapy
2. Inhaler containing both ICS and fast acting LABA
Low dose ICS?
- <= 400mcg budesonide or equivalent
- 400-800mcg budesonide or equivalent
- . >800mcg budesonide or equivalent
IPF defn?
Intersitial pulmonary fibrosis, a condition characterised by progressive fibrosis of the interstitium of the lungs
IPF demographic?
50-70y/o, 2M:1F
4 features of IPF?
- Progressive exertional dyspnoea
- Bibasal fine end-inspiratory crackles on auscultation
- Dry cough
- Clubbing
IPF Dx?
- Spirometry = restrictive pressure (FEV1/FVC ratio increased >70%)
- Impaired gas exchange = reduced transfer factor (TLCO)
- CT = ground glass shadowing and honeycombing
- ANA positive in 30%, RhF positive in 10%
Mx of IPF?
- Conservative = pulmonary rehabilitation
- Medical = supplementary oxygen, pirfenidone (antifibrotic agent)
- Surgical = lung transplant
IPF Prognosis?
Poor, average life expectancy around 3-4 years
Most important risk factor for aspiration pneumonia?
Recent intubation (neuromuscular agents, intubation can cause regurgitation, can damage trachea/airway)
Aspiration pneumonia defn?
- Pneumonia that develops due to foreign materials gaining entry to the bronchial tree
- Both a chemical and a bacterial pneumonitis can occur
ARDS defn?
An acute condition characterized by bilateral pulmonary infiltrates and severe hypoxemia (PaO2/FiO2 ratio < 200) in the absence of evidence for cardiogenic pulmonary oedema (clinically or pulmonary capillary wedge pressure of less than 18 mm Hg).
ARDS mortality?
40%
Causes of ARDS?
- Infection = sepsis, pneumonia
- Massive blood transfusion
- Trauma
- Smoke inhalation
- Acute pancreatitis
- Cardio-pulmonary bypass
Criteria for ARDS Mx?
- Acute onset
- Pulmonary oedema
- Non-cardiogenic
- pO2/FiO2 < 40kPa (200mmHg)
ARDS Mx?
- ITU
- Oxygenation/ventilation to treat hypoxaemia
- General organ support e.g. vasopressors
- Tx of underlying cause
Where should NG tube be positioned on X ray?
Subdiaphragmatic
ENT, resp and kidney involvement?
GPA (Wegener’s)
Renal disease with hearing impairment?
Alport’s
GPA Mx?
- Steroids
- Cyclophosphamide
- Plasma exchange
GPA Mx?
Median survival 8-9 years
6 causes of respiratory alkalosis?
- Anxiety
- PE
- Salicylate poisoning
- CNS disorders = stroke, SAH, encephalitis
- Altitude
- Pregnancy
Salicylate overdose ABG?
Mixed respiratory alkalosis and metabolic acidosis
Lung cancer 5 Ix?
- CXR
- CT
- Bronchoscopy +/- EBUS
- PET (typically NSCLC to establish eligibility for curative tx)
- Bloods = raised platelets
Most common cause of cannonball metastases?
Renal cell cancer
5 origins for lung mets?
- Breast
- Colorectal
- Renal
- Bladder
- Prostate
3 causes of cannonball metastases?
- RCC
- Choriocarcinoma
- Prostate
2 causes of calcification in lung metastases?
- Chondrosarcoma
2. Osteosarcoma
Target O2 in pts with COPD whose CO2 is known to be normal?
94-98%
Post-bronchodilator FEV1/FVC of COPD?
< 0.7
COPD staging?
- Stage 1 = mild = FEV1 > 80%
- Stage 2 = moderate = 50-79%
- Stage 3 = severe = 30-49%
- Stage 4 = very severe = <30%
4 CXR findings of COPD?
- Hyperinflation
- Bullae
- Flat hemidiaphragm
- Hyperlucent lung fields
Complication if pleural effusion is drained too quickly?
Re-expansion pulmonary oedema
Pleural aspiration tests?
- pH
- protein
- LDH
- Cytology
- Microbiology
Exudate pleural effusion protein level?
> 30g/L
Transudate pleural effusion protein level?
<30g/L
When should Light’s criteria be applied?
If protein level is 25-35g/L
2 causes of low glucose pleural effusion?
- RhA
2, TB
2 causes of raised amylase pleural effusion?
- Pancreatitis
2. Oesophageal perforation
3 causes of heavy blood staining pleural effusion?
- Mesothelioma
- PE
- TB
Mx of recurrent pleural effusion?
- Recurrent aspiration
- Pleurodesis
- Indwelling pleural catheter
- Drugs to relieve sx e.g. opioids for dyspnoea
4 commonest causes of an anterior mediastinum mass?
4 Ts
- Teratoma
- Terrible lymphadenopathy
- Thymic mass
- Thyroid mass
- Thoracic aortic aneurysm
What is the mediastinum?
The region between the pulmonary cavities, covered by the mediastinal pleura. It extends from the thoracic inlet superiorly to the diaphragm inferiorly
Smoking cessation?
- NRT, varenicline or bupropion, to last only until 2 weeks after the target stop date
Nicotine replacement therapy?
Offer a combinaiton of nicotine patches and another form of NRT (e.g. gum, inhalator, lozenge or nasal spray)
Varenicline?
- A nicotinic receptor partial agonist
- 12 week course ypically
- C/I in pregnancy and breastfeeding
Bupropion?
- A NA and DA reuptake inhibitor, and nicotinic antagonist
2. C/I in epilepsy, pregnancy and breastfeeding
Smoking cessation in pregnant women?
- 1st line = CBT, motivational interviewing, structured self help
- NRT if above fails
Mx of COPD?
- Conservative = smoking cessation, pulmonary rehabilitation
- Medical = annual influenza vaccination, one-off pneumococcal vaccination, inhalers
1st line bronchodilator for COPD?
SABA or SAMA
2nd step for COPD bronchodilator mx is determined by?
If the pt has asthmatic features/features suggesting steroid responsiveness
Asthmatic/steroid responsive fx in a COPD pt?
- Prev. dx of asthma/atopy
- Higher blood eosinophil count
- FEV1 variation over time (at least 400ml)
- Diurnal variation in peak expiratory flow (at least 205)
2nd line for COPD w/ no asthmatic/steroid responsiveness fx?
Add LABA + LAMA
2nd line for COPD w/ asthmatic/steroid responsiveness fx?
- LABA + ICS
2. If pt remains breathless/have exacerbations offer triple therapy = LAMA + LABA + ICS
Mx of cor pulmonale?
Use loop diuretic for oedema, consider LTOT
Fx which may improve survival in pts with stable COPD?
- Smoking cessation
- LTOT if fits criteria
- Lung volume reduction surgery in some pts
Medication that may benefit in IPF?
Pirfenidone (antifibrotic agent)
Chest drain swinging?
Rises in inspiration, falls in expiration
Most common cause of an exudative pleural effusion?
Pneumonia
4 transudate causes of pleural effusion?
<30g/L protein
- HF (most common)
- Hypoalbuminaemia (liver disease, nephrotic syndrome, malabsorption)
- Hypothyroidism
- Meigs’ syndrome
Causes of exudate pleural effusion?
> 30g/L protein
- Infection = pneumonia, TB, subphrenic abscess
- Inflammation = RA, SLE
- Malignancy = primary/mets
- Pancreatitis
- PE
- Dressler’s syndrome
- Yellow Nail syndrome
What is the abx prophylaxis for COPD?
Oral azithromycin 250mg 3x a week
Abx prophylaxis for COPD criteria?
- Dont smoke
- Optimised pharm mx
- > =1 of: frequent exacerbations, prolonged exacerbations, exacerbations resulting in hospitalisations
Example of mucolytic drug for COPD?
Carbocisteine
CXR of a pt with latent TB?
Calcified Ghon complex
Mx of latent TB?
- 3 months Isoniazid and Rifampicin OR
2. 6 months Isoniazid