Extracorporeal Circulation


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Related to Extracorporeal Circulation: Extracorporeal membrane oxygenation

Extracorporeal Circulation

 

methods of maintaining, with special apparatus, the circulation of blood and metabolism in the body or individual parts and organs of the body at an optimum level by perfusion (passage of blood or liquid blood substitute).

Different methods of extracorporeal circulation are used, depending on the indications. General perfusion involves total exclusion of the heart and lungs from the blood circulation and their temporary replacement by a special device; it is used in certain operations on the heart and large blood vessels. Auxiliary perfusion is used when it is necessary to temporarily ease the functioning of the heart and lungs by mechanical means—for example, in cardiac and pulmonary insufficiency or in resuscitating an individual pronounced clinically dead. Regional or isolated perfusion, whereby only part of the body or individual organs temporarily deprived of the normal inflow of blood are perfused mechanically, is performed in the treatment of certain diseases and injuries (endarteritis obliterans and certain malignant tumors, for example). When tumors are treated, massive doses of cytostatic substances (agents that suppress cell multiplication) are added to the liquid perfused. Regional perfusion calls for having the heart and lungs simultaneously provide adequate circulation for the rest of the body. Regional perfusion is also used to preserve organs slated for transplantation.

The effectiveness of extracorporeal circulation depends on how well it is carried out—that is, maintenance during perfusion of the volume of the perfusion current, arterial and venous pres-sure, volume of circulating blood, monitoring and correction of metabolic processes (acid-base equilibrium, water-electrolyte balance, blood gases), brain activity, kidney function, biochemical parameters, and cellular composition of the peripheral blood. For this purpose the patient receives transfusions of blood and blood preparations, alkaline solutions, electrolytes, diuretics, and so forth during and after extracorporeal circulation. The effectiveness of extracorporeal circulation is increased by combining it with general or local hypothermia, which greatly reduces oxygen consumption by the tissues, thereby permitting the rate of perfusion to be slowed.

The first operations on the human heart using extracorporeal circulation were performed by the Americans F. D. Dodrill (1952) and J. H. Gibbon (1954) and by the Soviet surgeon A. A. Vishnevskii (1957). The principle of extracorporeal circulation underlies the functioning of the artificial kidney.

REFERENCES

Iskusstvennoe krovoobrashchenie. Edited by J. G. Allen. Moscow, 1960. (Translated from English.)
Briukhonenko, S. S. Iskusstvennoe krovoobrashchenie. (Sb. robot po voprosam iskusstvennogo krovoobrashcheniia.) Moscow, 1964.
Galletti, P., and G. Brecher. Osnovy i tekhnika ekstrakorporal’nogo krovoobrashcheniia. Moscow, 1966. (Translated from English.)

A. P. RZHANOVICH

References in periodicals archive ?
Antinitsis, "Successful high-risk percutaneous coronary intervention with the use of minimal extracorporeal circulation system," Catheterization and Cardiovascular Interventions, vol.
The early transient postoperative hyperbilirubinemia occurs after modern extracorporeal circulation. It is mainly caused by an increase in both conjugated and unconjugated bilirubin concentration and associated with a higher mortality.
Perez et al., "Antioxidant therapy reduces oxidative and inflammatory tissue damage in patients subjected to cardiac surgery with extracorporeal circulation," Basic and Clinical Pharmacology and Toxicology, vol.
In a previous study (19), increased cross clamping time was found to be a predictor of increased coronary events including mortality in patients undergoing CABG for LMCA disease and extracorporeal circulation time was very close to be significant as such a predictor.
Extracorporeal circulation. In: Colman RD, Hirst J, Marder VJ, Salzman EW, eds.
The subject of the public contract is the replacement of one piece of the existing device for extracorporeal circulation, including the provision of full-service after-warranty service and supplies of unique consumables for the delivered device.
Comparison of perioperative technical characteristics between the two groups: No difference was observed in the mode of valvular surgery, category of valve and length of hospital stay (P>0.05), but the duration of extracorporeal circulation and aortic occlusion of the observation group was significantly longer than that of the control group (P0.05).
Using the extracorporeal circulation (ECC) model in vitro, we clearly showed that effectiveness of leukocyte filtration depends on exposure time during ECC.
Following median sternotomy and meticulous dissection of the adhesions, extracorporeal circulation was initiated using aortic and bicaval cannulations.
Because he had advanced disease, the baby was placed on extracorporeal circulation membrane oxygenation for cardiorespiratory support.
With the use of the heart-lung machine (extracorporeal circulation) the patient was successfully intervened, executing the delicate removal of the clot that was inside the heart cavity and performing the replacements of two heart valves (mitral and aortic).
That is because, high- pressure blood flow from main artery makes exposure difficult and severe outcomes such as perfusion lung and severe damage on blood components may be induced.9,10 To repair patent ductus arteriosus, hypothermia and flow perfusion and even suspension of circulation are usually adopted; however, the incidence of extracorporeal circulation associated complications becomes higher in such a condition.
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