SAQ 1011 – Gastroenterology – persistent vomiting with abnormal blood gas

A 56-year-old man re-presents with ongoing vomiting after being discharged the previous night with a diagnosis of gastroenteritis. He can tolerate small amounts of fluid but continues to vomit. He has hypertension.

His venous blood gas is shown.

Parameter	Result
pH	7.50
pCO2	44
HCO3	37
Base excess	12.1
Sodium	138
Potassium	3.1
Chloride	90
BSL	8.9
Lactate	1.6
Haemoglobin	156

List four causes of vomiting in the absence of abdominal pain.

(Marked out of 4.0)

/ 4

What are the two main findings on this gas?

(Marked out of 2.0)

/ 2

Complete the table for this acid-base disturbance.

(Marked out of 8.0)
</p> <table class="saq-prop-table" style="width: 100%; max-width: 100%; table-layout: fixed; border-collapse: collapse;"> <thead> <tr> <th style="overflow-wrap: anywhere; word-break: normal; white-space: normal; vertical-align: top; box-sizing: border-box;">Cause of acid-base disturbance</th> <th style="overflow-wrap: anywhere; word-break: normal; white-space: normal; vertical-align: top; box-sizing: border-box;">Example</th> </tr> </thead> <tbody> <tr> <td style="overflow-wrap: anywhere; word-break: normal; white-space: normal; vertical-align: top; box-sizing: border-box;"></td> <td style="overflow-wrap: anywhere; word-break: normal; white-space: normal; vertical-align: top; box-sizing: border-box;"></td> </tr> <tr> <td style="overflow-wrap: anywhere; word-break: normal; white-space: normal; vertical-align: top; box-sizing: border-box;"></td> <td style="overflow-wrap: anywhere; word-break: normal; white-space: normal; vertical-align: top; box-sizing: border-box;"></td> </tr> <tr> <td style="overflow-wrap: anywhere; word-break: normal; white-space: normal; vertical-align: top; box-sizing: border-box;"></td> <td style="overflow-wrap: anywhere; word-break: normal; white-space: normal; vertical-align: top; box-sizing: border-box;"></td> </tr> <tr> <td style="overflow-wrap: anywhere; word-break: normal; white-space: normal; vertical-align: top; box-sizing: border-box;"></td> <td style="overflow-wrap: anywhere; word-break: normal; white-space: normal; vertical-align: top; box-sizing: border-box;"></td> </tr> </tbody> </table> <p>

/ 8

You suspect gastric outlet obstruction. What underlying pathologies can cause this problem?

(Marked out of 4.0)

/ 4

Total Score: 0 / 18

Percentage: 0%