All Subjects Medicine Surgery Pathology Anatomy Pharmacology Social & Preventive Medicine Microbiology Gynaecology & Obstetrics Dental Physiology Biochemistry Pediatrics
Showing 3225 questions
Sort:
2496 Anaesthesia

A 27-year-old man was assaulted and stabbed on the left side of the chest between the areola and the sternum. He is hemodynamically unstable with jugular venous distention, distant hea sounds, and hypotension. Which of the following findings would be consistent with a diagnosis of hemodynamically significant cardiac tamponade?

AMore than a 10 mm Hg decrease in systolic blood pressure at the end of the expiratory phase of respiration
BDecreased right atrial pressures on Swan-Ganz monitoring
CEqualization of pressures across the 4 chambers on Swan-Ganz monitoring
DCompression of the left ventricle on echocardiography
Anaesthesia
View Explanation →
2498 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
View Explanation →