c l i n i c a l f o l i o s : n a r r a t i v e





A D V E R T I S E M E N T

 

Aortic Valve Replacement: 7

A D V E R T I S E M E N T

   
 

The cardiopulmonary bypass machine is shown. It includes a centrifugal pump head to generate flow and pumps for the different suckers that are used to aspirate blood from the field and return to the circulation. The machine also includes an oxygenator which acts as the "artificial lungs" to oxygenate the desaturated venous blood that returns from the body to the machine. A filter in the system removes most of the particulate matter (thrombus, bacteria, etc.). A heating/cooling system allows the perfusionists to modify the temperature of the blood.     

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Aortic Valve Replacement: 8

A D V E R T I S E M E N T

   
 

Two perfusionists are seen operating the heart-lung machine. Heparin is administered to prevent clotting in the tubing of the apparatus and the anticoagulation is reversed with protamine at the end of the case. Protamine comes from salmon sperm, and the patient is asked about allergy to fish in the pre-op workup.      

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Aortic Valve Replacement: 9

A D V E R T I S E M E N T

   
 

The surgical instruments used for the operation are displayed. Note the aortic valve sizers (in green) in the middle of the table. These allow the surgeon to measure the size of the aortic annulus to decide which size valve to implant.       

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This page was last modified on 5/17/2000.