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At least 865 records · Page 48Linked to original sources
PubMed1985

[Acute renal failure after extracorporeal circulation with aortic counterpulsation in surgically treated patients].

In a series of 604 adults operated on for cardiac surgery with cardiopulmonary bypass (CPB), 21 (3.5%) underwent circulatory assistance by intra-aortic balloon pump (IABP); in 5 of them (24%), acute renal failure (ARF) was observed. ARF occurred in only 26 (4.4%) of the other patients who did not require IABP. Evolution of ARF and its factors were therefore investigated in those patients having received IABP. ARF was defined as serum blood urea nitrogen (BUN) greater than or equal to 16 mmol X 1(-1), urinary urea/BUN less than 10, creatinine clearance less than 40 ml X min-1 X 1.73 m-2. Some perioperative features were compared between patients with postoperative ARF and those without ARF. ARF occurred in the 5 patients with IABP during, or immediately after, weaning from IABP. ARF was more frequent in patients operated on for mechanical complications of myocardial infarction with a significant more severe haemodynamic status. They had significantly longer CPB and aortic clamping times. The prognosis depended on the cardiac failure and not on the ARF. In patients with mechanical complications of infarction, early IABP seemed to be the predominant preventive measure. Other therapeutic implications are suggested, particularly the use of dopamine (1 to 3 micrograms X kg-1 X min-1) because of its renal vasodilating action which can contribute to the maintenance of urinary flow.

Acute Kidney Injury↗
PubMed1987

Uterine-umbilical velocimetry in open heart surgery.

The effect of the nonpulsating cardiac pump in uterine and umbilical circulation has not been studied extensively by measuring the resistance of the uterine and umbilical circulation with velocimetry. During open heart surgery, we were able to demonstrate the effects of the nonpulsatile cardiac pump.

Adult↗
PubMed2004

[Research on the feasibility of a magnetic-coupling-driven axial flow blood pump].

A new-designed axial flow blood pump, dived by magnetic coupling and using internal hollow brushless DC motor and inlet and outlet in line with impeller, was tested in mimic circuit. The results showed good performance of the new pump and indicated that its hydrodynamic characteristic can meet the demands of clinical extracorporeal circulation and auxiliary circulation.

Assisted Circulation↗
PubMed1984

Effects of immersion in cholesterol-lipid solution on the tensile and fatigue properties of elastomeric polymers for blood pump applications.

Tensile and fatigue properties were studied on three kinds of segmented polyether polyurethanes developed for blood pump applications. To study the effects of plasma constituents, specimens were immersed in a cholesterol-lipid solution whose composition is similar to that of plasma. The results obtained were compared with those observed in a saline solution which had been reported previously. Immersion in the cholesterol-lipid solution has influence on the mechanical properties of Toyobo TM5 polyurethane and Avcothane 51: Its effect is enhanced by cyclic deformation. Cholesterol-lipids change the mechanical characteristics of Avcothane 51 more remarkably than those of Toyobo TM5 polyurethane possibly because the former contains about 10% silicone. On the other hand, there is little effect of the constituents of the cholesterol-lipid solution on the static and dynamic mechanical properties of Biomer, although moisture and cyclic deformation have some influence on the mechanical characteristics.

Assisted Circulation↗
PubMed2004

Mechanical cardiac support system for patients with postcardiotomy cardiogenic shock: analysis of risk factors for survival.

OBJECTIVE: Mechanical cardiac support system (MCSS) has been used for adult patients in postcardiotomy cardiogenic shock and has been shown to provide excellent oxygenation and hemodynamic support. However, MCSS has a number of disadvantages that include high incidence rate of complications (e.g. stroke, bleeding) and limited duration of sufficient support. The objective of this study is to identify perioperative and postoperative factors for survival in patients having MCSS. METHODS: From January 1991 to April 2001, MCSS has been applied to 22 adult patients in postcardiotomy cardiogenic shock. These patients' charts were retrospectively reviewed. RESULTS: Of 22 patients, 9 patients (41%) were successfully weaned, and 6 (27%) were hospital survivors. The duration of assist ranged from 21 to 211 hours (median 66 hours). In 7 (78%) out of 9 patients who could be weaned from MCSS, MCSS were required for less than 3 days. Major complications were reexploration for bleeding (18%), leg ischemia (45%), renal dysfunction (77%), liver dysfunction (59%), infection (31.8%), hypoxia due to lung dysfunction (36%) and cerebral dysfunction (41%). pH, base excess, HCO3-, urine output, transfused platelets at first 24 hours of MCSS and preoperative body surface area were significant predictors for survival. CONCLUSION: The indices of insufficient hemodynamic support such as progression of acidosis or poor urine output are significant predictors for early death. Early conversion from MCSS to long-term assist device, such as left ventricular assist device, should be considered when these factors are associated with poor cardiac recovery.

Acidosis↗