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Question of the Week: October 1, 1999 Describe 3 clinical findings associated with compression of the right 3rd Cranial Nerve. Answer: Two 3rd cranial nerves (oculomotor nerves) are located at the top of the brainstem - one to the right and one to the left. Motor messages from the 3rd cranial nerve...

Question of the Week: June 30, 2000 What is a PPI? ANSWER: PPI stands for proton-pump inhibitor. The proton-pump is the enzymatic system in the gastric parietal cell which secretes hydrochloric acid. This is the final step in the production of stomach acid, therefore treatment with a PPI will...

What is the reason for measuring SjvO 2 (Jugular Venous Oxygen Saturation)? Answer: Similar to Measuring Mixed Venous Oxygen Saturation (SjvO 2 ), Jugular Venous Oxygen Saturation (SjvO 2 ) is a measurement of the amount of oxygen in the venous blood taken from a catheter inserted into the jugular...

Question of the Week: February 4 2000 Should stress ulcer prophylaxis with H 2 blockers be discontinued after enteral feeding begins? Answer

Question of the Week: March 31, 2000 An intraventricular drainage unit is set-up with the drainage circuit open, and positioned at 10 cm above the external auditory canal. Drainage of the catheter should begin if the ICP rises above what pressure on the beside monitor? trr the absence of drainage...

Question of the Week: March 24, 2000 An intraventricular drainage unit is positioned at 15 cm above the external auditory canal. The bedside monitor reveals a pressure of 35 mmHg, however, there is no drainage of CSF from the catheter. Identify 2 possible reasons for the absence of drainage. trr the...

How is cerebral perfusion pressure calculated and what is a normal value? trr the absence of drainage. ANSWER: Cerebral Perfusion Pressure (CPP) is calculated as the mean blood pressure (MBP) - mean intracranial pressure (ICP). CPP = MBP - ICP Normal CPP = 60-80 Normal MBP is 70-90. Normal ICP is <...

Question of the Week: February 27, 2000 What are the criteria for right bundle branch block? Answer

Question of the Week: March 3, 2000 What are the criteria for left bundle branch block? Answer

Why do we measure Mixed Venous Oxygen Saturation (SVO 2 )? Answer: Mixed venous oxygen saturation (SVO2) can help to determine whether the cardiac output and oxygen delivery is high enough to meet a patient's needs. It can be very useful if measured before and after changes are made to cardiac...