Canadian Medical Guide > Analytical, Diagnostic and Therapeutic Techniques and Equipment > Surgical Procedures, Operative > Extracorporeal Circulation Terms and Definitions

Extracorporeal Circulation

Medical Definition:	Diversion of blood flow through a circuit located outside the body but continuous with the bodily circulation.
Guide Notes:	"diversion of blood flow through a circuit located outside the body but continuous with the bodily circulation"; GEN & unspecified: prefer specifics; do not confuse with CARDIOPULMONARY BYPASS or ASSISTED CIRCULATION; do not use /util except by MeSH defin
Previously Indexed:	Heart-Lung Machine (1966)

Extracorporeal Circulation Categories.

	Cardiopulmonary Bypass - Diversion of the flow of blood from the entrance of the right atrium directly to the aorta (or femoral artery) via an oxygenator thus bypassing both the heart and lungs.
	Heart Bypass, Left - Diversion of the flow of blood from the pulmonary veins directly to the aorta, avoiding the left atrium and the left ventricle (Dorland, 27th ed). This is a temporary procedure usually performed to assist other surgical procedures.
	Perfusion, Regional - Neoplasm drug therapy involving an extracorporeal circuit with temporary exclusion of the tumor-bearing area from the general circulation during which high concentrations of the drug are perfused to the isolated part.
	Ultrafiltration - The separation of particles from a suspension by passage through a filter with very fine pores. In ultrafiltration the separation is accomplished by convective transport; in DIALYSIS separation relies instead upon differential diffusion. Ultrafiltration occurs naturally and is a laboratory procedure. Artificial ultrafiltration of the blood is referred to as HEMOFILTRATION or HEMODIAFILTRATION (if combined with HEMODIALYSIS).

Extracorporeal Circulation Medical Definitions and Terms

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