Análise do perfil hidrodinâmico em diferentes modelos de bombas de rolete utilizadas em circulação extracorpórea

Abstract

Análise do perfil hidrodinâmico em diferentes modelos de bombas de rolete utilizadas em circulação extracorpóreaAnalysis of the hydrodynamic profile in different roller pumps models used in cardiopulmonary bypass Abstract Objective: Among the equipments used in cardiopulmonary bypass the roller pumps have great importance with various models available from several manufacturers. The calibration is an important factor in hemolysis rates and its potential is different in each. Researchers do not always approach details on the pump bed profiles assuming that the standardized calibration settings ensure equal and comparable values for all models of roller pumps. We have mainly two methods for calibration of pumps which also interferes on the hemolytic potential. In both of them, the characteristics of fluid impulsion defined by the pump bed design are not considered. The aim of this study is to compare the hydrodynamic profile of three models of roller pumps available in the Brazilian market.Method: The rollers occlusion was performed by measures of drop and dynamic calibration. Two different silicone diameter tubes were used (3/8 x 1/16 and 1/2 x 3/32 inches).Results: The profiles showed differences in their variances, P<0.01 for drop rate measures and P<0.0001 for dynamic calibration. Different changes in pressure were found between the pumps analyzed (P<0.002).

Clinical Evaluation of the Spiral Pump® After Improvings to the Original Project in Patients Submitted to Cardiac Surgeries With Cardio Pulmonary by Pass

“…Currently, roller pumps are used in cardiac surgery and centrifugal pumps for severe cases. The roller pump is widely used due to low cost, easy usage and simplicity, its flow is linear with slight pulsatility, but generates high negative pressure when sucking blood to the CPB circuit, which can cause major blood damages [ 10 ] . Centrifugal pumps, mostly imported, have higher costs, so they are not often used.…”

Os perfusionistas Brasileiros e o ajuste do rolete arterial: comparação entre a calibração estática e dinâmica

“…The professionals involved in surgery have sought alternatives that might reduce the use of cardiopulmonary bypass (CPB), as well as the use of new techniques that minimize trauma to the blood cells by the use of CPB [5][6][7][8][9].…”

Circulação Extracorpórea

“…The study of equipment and knowledge of every detail in its operation are essential [28][29][30], not only for the perfusionist, as for the whole team, that should work in perfect understanding, thus no detail escapes from the correct and instant observation of the person in charge, avoiding jeopardizing the patient's life, as well as their physical and mental integrity [31,32].…”