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Respiratory Tract Infections > Investigations > Flashcards

Flashcards in Investigations Deck (7)
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1

What are the investigations for CAP?

- CXR
- WBC, CRP, PCT
- O2 sat, ABG
- Sputum gram stain and culture
- Throat swab for viruses (PCR)
- Blood culture
- Urine pneumococcus and legionella antigen

2

What investigations are done for pneumonia?

- FBC
- WCC, Hb, platelets
- U+ E's - urea and creatinine could > AKI > sepsis
- LFT's - sepsis
- CRP
- Lactate - sepsis
- CXR
- Ultrasound
- Blood culture
- Sputum culture
- PCR
- Urinary antigen

3

What would a right upper lobe collapse look like on a CXR?

Loss of lung volume and ribs pulled together on the right. Trachea is shifted to the right, compensatory hyper-inflation of left lung.

4

What does consolidation look like on a CXR?

- Margins are poorly defined
- Air bronchograms
- Costo-diaphragmatic angle is maintained

5

What does effusion look like on a CXR?

- Well-defined border rising into axilla
- No air bronchograms
- Costo-diaphragmatic angle is lost

6

What investigations should be done for TB?

- CXR
- CRP
- HIV test
- LFTs - TB medications affect the liver
- Sample for microbiology - sputum smear and culture, aspirate/biopsy e.g. pleura, lymph node
- Tuberculin skin test - Mantoux test (can't separate active and latent TB)

7

What would post-primary disease TB show on a CXR?

- Upper lobe consolidation
- Apical segment lower lobe
- Cavitation
- Volume loss
- Lymphadenopathy
- Pleural effusion
- Pneumothorax