Respiratory medicine Flashcards
Pneumothorax
Feutres of tension pneumothorax?
Distended neck veins, hypotension, tracheal deviation
Pneumothorax
How to manage Primary spontaneouns pneumothorax?
1) If less than 2 cm, asymptomatic. Discharge with follow up.
2) If more than 2 cm, or symptomatic thoracostomy tube
(If patient has high risk features, it is always safe to intervene)
Pneumothorax
What are the causes of SPS?
1) COPD.
2) Emphysema.
3) Necrotizing pneumonia.
4) PJP in HIV
5) Langerhan histiocytosis.
6) Barotrauma.
7) Cystic fibrosis.
Pneumothorax
What are the high risk features of pneumothorax?
1) Age > 50
2) Underlying lung disease.
3) Bilateral pneumothorax
4) Hemothorax.
5) Hemodynamically unstable.
If the patient is symptomatic. First thing to look for is the high risk features.
2) Hemodynamic unstability
3) CXR: Bil
1) History: Age and Background.
Pneumothorax
How to approach asymptomatic patient with pneumothorax?
1) PSP: Discharge + follow up.
2) SPS: Inpatient admission and observation
Pneumothorax
When the patient can go to a flight after pneumothorax?
- 2 weeks after CXR check up
Pneumothorax
When the patient can go for scuba diving after pneumothorax?
Absolute contraindication life-long. Unless:
- Bilateral surgical pleurectomy done.
- Normal CT and lung function.
Pneumothorax
Next step if patient symptoms not resolved after needle aspiration?
Chest drain
ABPA
What are the features of ABPA?
1) Difficult to treat asthma.
2) Central bronchiectasis.
3) esonophilia.
4) Positive IgE (High) and positive IgG
What are the management options of ABPA?
1) Steroid.
2) Itraconazole (second-line)
3) Prednisone + Omalizumab
Risk factors for ABPA?
BA and CF
What are the species of aspergillus + syndrome
- Aspergillus fumigitus = ABPA
- Aspergillous flavus = Risk factor for HCC
- Aspergillosis = HIV with CD4 < 100
Sputum culture of ABPA patient?
Branching septate hyphae, branch at acute angle < 45.
Aspergillus Ag Skin brisk
Next step in 55 years old patient with incidental finding of primary pneumothorax 3 cm?
Outpatient follow up
Age is a risk factor but no admission for asymptomatic + no chronic lung diseases.
Treat if:
- Symptomatic + more than 50 + significant smoking history.
Admit and observe if:
- Asymptomatic + older than 50 with significant smoking history
What is the effect of GPA on DLCO?
Increasing it.
Risk factors of lung cancer
- asbestos - increases risk of lung ca by a factor of 5
- arsenic
- radon
- nickel
- chromate
- aromatic hydrocarbon
- cryptogenic fibrosing alveolitis
What are the causes of Upper lobe fibrosis?
1) Occupational:
- HSP, CWP, Silicosis, Berylliosis, Histiocytosis
2) Autoimmune: AS only
3) Sarcoidosis.
4) TB
Charactaristic feature of silicosis?
Upper lobe fibrosis + Eggshell calcification
Seropositive R.A + Multiple upper lobe pulmonary nodule?
Coal worker pneumoconiosis
Non-ceaseating granuloma in BAL Ddx?
1) Sarcoidosis.
2) HSP
3) Berylliosis
Sarcoidosis VS HSP In BAL?
1) HSP: Shows poorly formed non-ceasating granuloma.
2) HSP: Less than 1 % CD4\CD8
3) Berylliosis: shows positive berylliosis lymphocyte
Indication for antibiotic in COPD exacerbation based on NICE ?
- Purelent sputum.
- Clinical signs of pneumonia
When to repeat CT chest in patient found to have pleural plaque due to aspestos plaque in CT?
No follow up needed.
Mode of inheritance of Cystic fibrosis?
AR
In which chromosome Cystic fibrosis mutation occur? and in which channel?
CFTR gene in long arm of chromosome 7
NaCl channel
What are other features of CF?
1) Failure to thrive
2) Diarrhea and intusseption
3) Diabetes mellitus
4) Pancreatic insuffiecency
What is the screening test for CF?
- Sweat chloride test.
In which mutation you can use the cystic fibrosis medications?
F508 (Most common mutation)
MOA of CF medications?
It is either potentiator: which allows the already formed channel to takes chloride inside
or Corrector: correct the misfolded proteins
Examples of CF medications?
1) Potentiator: Ivacaftur
2) Corrector: Lamucaftor, alexacaftur.
Lung cancer
Paraneoplastic syndromes associated with small cell lung cancer?
1) SIADH
2) ACTH
3) Lamber eaton syndrome
Lung cancer
Peripheral lung cancer + Non-smoker + Women
Adenocarcinoma
Lung cancer
Lung cancer + Clubbing?
Adenocarcinoma
Lung cancer
Lung cancer + Hypercalcemia?
Squamos cell carcinoma (Central)
Lung cancer
Lung cancer + hyperthyroidism?
Squamos cell
Syndromes associated with squamos cell carcinoma?
- Hypercalcemia
- Hyperthyroidism
Lung cancer
Lung cancer + Gynecomastia?
Adenocarcinoma