SAQ Stack

Short Answer Questions for ED Fellowship Study

Case: Projectile vomiting in 5-week-old

A 5-week-old boy has been brought to your ED with projectile vomiting.

1. State (5) differential diagnoses. For each, provide a key feature on history or examination that would support its presence. 5 marks

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A venous gas is provided below :

Test Result Units Reference range
pH 7.60 (7.35 – 7.45)
pCO2 56 mmHg (35 – 45)
HCO3 52 mmol/L (21 – 28)
Na 135 mmol/L (134 – 146)
K 3.1 mmol/L (3.4 – 5.0)
Cl 75 (98 – 108)
Glucose 2.6 mmol/L (3.6 – 8.0)

2. State (4) abnormalities from the blood gas providing an explanation for each. 4 marks

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3. Briefly state (4) key components of your initial management. 4 marks

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This case forms part of a collaborative marking project designed to support fellowship preparation. In the week leading up to each tutorial, you can contribute answers to any active case. If you contribute, your answers may be reviewed, marked, and used to refine the model answers during the weekly fellowship teaching sessions.

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Your personal results and updated model answers become available the day after the tutorial.

After the tutorial you can still do the case and self-mark your answers, but your answers will not be included in the group review.