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Cardiopulmonary Bypass Term Paper

Cardiopulmonary bypass entails the techniques through which perfusionists replace some major functions of the lungs and heart with a mechanical system to support a patient during surgical interventions on the pulmonary or cardiovascular system (Ghosh & Cook, 2009). It involves bypass of the lungs and heart in an open-heart surgery where perfusionists redirect blood getting to the heart via a heart-lung machine before it gets into the arterial circulation. Cardiopulmonary bypass takes the role of the lungs and heart during surgery. Reasons for Application

Cardiothoracic surgeons conduct cardiopulmonary bypass while repairing cardiac defects. The surgeons need a bloodless and motionless heart to work on, and to attain this, the surgeons stop the motion of the lungs and the heart. While the lungs and the heart remain motionless, there must be a way for blood to flow throughout the body to deliver oxygen and nutrients essential in life. Perfusionists...

Cardiopulmonary bypass is applicable during heart surgery because surgeons cannot operate easily on the pounding heart (Ghosh &, Cook (2009). As a result, CPB takes the function of the lungs and the heart given that it is difficult for surgeons to repair heart defects while the heart is pounding. Surgeries that call for the opening of the heart chambers needs employment of cardiopulmonary bypass to enhance circulation in the course of the surgery. The major function of CPB is to circulate blood for suitable composition to the patient's body to uphold viability of the patient during surgery.
The Procedure

Cardiopulmonary bypass oxygenates and circulates blood for the patient's body while sidestepping the lungs and the heart. The procedure utilizes a heart-lung machine to uphold perfusion to the body tissues…

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The patient receives heparin to avoid clotting besides protamine sulfate to overturn heparin effects. In the course of the procedure, the surgeons maintain hypothermia, and body temperature remains at 8°C to 32°C (McCann, 2005). The surgeons and perfusionists cool the blood during cardiopulmonary bypass and return it to the body. The cooled blood lowers the basal metabolic rate of the body, lowering its oxygen demand. Cooled blood holds an increased viscosity, while the crystalloid solution utilized to guide the bypass tubing water-down the blood. The cardiopulmonary bypass comprises of two major elements, which include the oxygenator and the pump. The oxygenator removes deoxygenated blood from the body replacing it with oxygenated blood via numerous hoses. The elements cardiopulmonary bypass circulates and interconnect through a chain of tubes formed of PVC or silicon rubber while the pump console consists of numerous rotating motor-compelled pumps that massage tubing peristaltically.

Risk Linked to CPB

During open-heart surgery, surgeons temporarily stop the pounding of the heart and maintain life via CPB. Surgeons stop the functioning of the heart through lowering its temperature or through a preservative injection to allow CPB to pump blood throughout the patient's body. Although
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