Tests
1st tests to order
chemistry panel
Test
Result
Test
Should be ordered in all suspected infants.
Fluid resuscitation should be based on correcting these abnormalities.
Result
in severe cases, hypochloremic alkalosis and mild hypokalemia
ultrasound abdomen
Test
Result
Test
Guidelines are based on measurements for term infants; pyloric canal length is shorter in premature infants.[9][Figure caption and citation for the preceding image starts]: Pyloric ultrasound. <1> interval: length; <2> interval: muscle widthFrom the collection of Dr Jeffrey S. Upperman; used with permission [Citation ends].
The sensitivity of ultrasound has been reported to be 97% to 99%.[5][8][50][51][52]
Result
pyloric muscle thickness >3 mm, pyloric canal length >15 mm
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