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147963 Anaesthesia

Concerning pulse oximetry true is

AOxyhemoglobin and deoxyhemoglobin light absorption is equal at the isobestic point of 660nm
BMeasurements are accurate in the presence of high levels of bilirubin
CMeasurements are accurate in presence of carboxyhaemoglobin
DMeasurements are accurate in presence of pigmented skin.
Anaesthesia
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147967 Pathology

A 1-month-old infant is brought to the physician by her parents. She has had repeated bouts of bilious vomiting over the past month and cannot be fed adequately She is in the 10th percentile for weight and the 50th percentile for length. An upper GI series discloses marked narrowing of the midportion of the duodenum. What is the most likely cause of this infant’s GI obstruction?

AAnnular pancreas
BDuodenal polyp
CIslet cell adenoma
DPancreatic pseudocyst
Pathology
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