Pyloric stenosis: measure, then watch

Question 1What is the typical age for pyloric stenosis?

1. aAround 1 year
2. bThe first 24 hours of life
3. cAround 5 years
4. dAbout 2 to 12 weeks

Question 2Which measurements support pyloric stenosis?

1. aMuscle wall 10 mm and channel 50 mm only
2. bMuscle wall 3 mm or more and channel about 15 mm or more
3. cAny visible pylorus
4. dMuscle wall 1 mm and channel 5 mm

Question 3The pylorus looks thick, then relaxes after a few minutes and fluid passes. What is the likely explanation?

1. aDefinite pyloric stenosis
2. bPylorospasm
3. cMalrotation
4. dIntussusception

Question 4A 4-week-old has green vomiting. What should you do?

1. aScan for pyloric stenosis and wait
2. bGive a feed and observe
3. cTreat it as possible malrotation and call the surgeons urgently
4. dDischarge with reflux advice

Question 5Which blood picture is typical after prolonged vomiting from pyloric stenosis?

1. aHigh potassium metabolic acidosis
2. bLow chloride, low potassium metabolic alkalosis
3. cHigh chloride metabolic acidosis
4. dNormal electrolytes always