Centrifugal pumps: description of devices and surgical techniques

Curtis, Jennifer; Walls, Joseph T.; Wagner‐Mann, Colette C.; Schmaltz, Richard A.; Demmy, Todd L.; McKenney, Charlotte A.; Mann, F. A.

doi:10.1016/s0003-4975(99)00583-4

Cited by 27 publications

(12 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Biventricular mechanical assist was used in 14 patients (67%), whereas left ventricular assist only was required in 4 patients (19%), and right ventricular assist only in 3 (14%). Our techniques of application of mechanical assist have been previously described (9–11).…”

Section: Methodsmentioning

confidence: 99%

Postcardiotomy Centrifugal Assist: A Single Surgeon's Experience

2002

View full text Add to dashboard Cite

Because of the infrequent application of cardiac assist devices for postcardiotomy heart failure, most published reports include the results of learning curves from multiple surgeons. Between October 1986 and June 2001, a single surgeon used 35 Sarns Centrifugal Pumps as ventricular assist devices in 21 patients with severe hemodynamic compromise after open heart surgery (0.88% incidence). Patients' ages ranged from 39 to 77 (mean, 59.6 years). Three patients required right ventricular assist devices, 4 left ventricular assist devices, and 14 had biventricular assist devices. For all, the indication for application was inability to wean from cardiopulmonary bypass despite multiple inotropes and intraaortic balloon pumping. All were expected to be intraoperative deaths without further mechanical assistance. Patients were assisted from 2 to 434 h (median, 48 h). Fifteen patients (71.4%) were weaned from device(s), and 11 patients (52.4%) were hospital survivors. Actuarial survival in those dismissed from the hospital was 78% at 5 years and 39% at 10 years. Patients facing certain demise after cardiac surgery can be salvaged with temporary centrifugal mechanical assist. Results are competitive with that achieved with more sophisticated devices. Hospital survivors enjoy reasonable longevity.

show abstract

Section: Methodsmentioning

confidence: 99%

Postcardiotomy Centrifugal Assist: A Single Surgeon's Experience

2002

View full text Add to dashboard Cite

show abstract

“…Because of simplicity of application, universal access, and low cost, extracorporeal centrifugal rotary blood pumps (CRBPs) are commonly used for shortterm mechanical cardiac assistance through femoralfemoral bypass, cardiopulmonary bypass, ventricular assistance, and extracorporeal membrane oxygenation (ECMO) (1,2). The problems of CRBP system relating to mechanical bearings have been reported and they include (i) mechanical trauma of red blood cells, friction or heat generation around mechanical shaft seal (3); (ii) in the seal-less pivot bearing, hemolytic performance depending on the contact area, magnetic coupling force or the rotational speed (4)(5)(6); and (iii) thrombus formation occurring at the area of low shear rate or stagnation area around the mechanical bearings (7,8).…”

mentioning

confidence: 99%

Hemolytic Performance of a MagLev Disposable Rotary Blood Pump (MedTech Dispo): Effects of MagLev Gap Clearance and Surface Roughness

et al. 2006

View full text Add to dashboard Cite

Mechanical shaft seal bearing incorporated in the centrifugal blood pumps contributes to hemolysis and thrombus formation. In addition, the problem of durability and corrosion of mechanical shaft seal bearing has been recently reported from the safety point of view. To amend the shortcomings of the blood-immersed mechanical bearings, a magnetic levitated centrifugal rotary blood pump (MedTech Dispo Model 1; Tokyo Medical and Dental University, Tokyo, Japan) has been developed for extracorporeal disposable application. In this study, the hemolytic performance of the MedTech Dispo Model 1 centrifugal blood pump system was evaluated, with special focus on the narrow blood path clearance at the magnetic bearing between rotor and stator, and on the pump housing surface roughness. A pump flow of 5 L/min against the head pressure of 100 mm Hg for 4 h was included in the hemolytic test conditions. Anticoagulated fresh porcine blood was used as a working fluid. The clearance of blood path at the magnetic bearing was in the range of 100-250 micro m. Pump housing surface roughness was controlled to be around Ra = 0.1-1.5 micro m. The lowest hemolytic results were obtained at the clearance of 250 micro m and with the polished surface (Ra = 0.1 micro m) yielding the normalized index of hemolysis (NIH) of less than 0.001 g/100 L, which was 1/5 of the Biopump BP-80 (Medtronic Inc., Minneapolis, MN, USA, and 1/4 of the BPX-80. In spite of rough surface and narrow blood path, NIH levels were less than clinically acceptable level of 0.005 g/100 L. The noncontact, levitated impeller system is useful to improve pump performance in blood environment.

show abstract

“…5 The results in this limited study are in accordance with those of larger series with weaning rates of 45%-60% and patient discharge rates of 20%-42%. 2,7 In addition, most of the patients successfully discharged have a satisfactory long-term survival. 8 Two of our patients died suddenly during follow-up and we think they might have suffered fatal arrhythmias as a complication of their congenital pathology.…”

Section: Discussionmentioning

confidence: 95%

“…1 Of the various ventricular assist devices presently available, the centrifugal pump has been used most often. 2 This may be due to the fact that centrifugal pumps are available in most cardiovascular surgery centers and are relatively simple and inexpensive compared to other mechanical assist devices. The Biomedicus Bio-Pump (Medtronic, Inc., Eden Prairie, MN, USA) is the most widely used centrifugal pump for cardiac assistance.…”

Section: Introductionmentioning

confidence: 99%

Postoperative Mechanical Circulatory Support with Biomedicus Centrifugal Pump

Mert

Akçevin

Yıldız³

et al. 2005

Asian Cardiovasc Thorac Ann

View full text Add to dashboard Cite

Despite advances in surgical techniques, myocardial protection, and management protocols, approximately 1% of patients undergoing open heart operations still need mechanical circulatory support for severe cardiac dysfunction. The Biomedicus centrifugal pump, available in most cardiovascular centers, is a highly effective and relatively inexpensive system compared to other more sophisticated devices for the same purpose. Of 10 patients aged 5 to 61 years who were supported for 22 to 168 hours with a Biomedicus centrifugal pump, 7 (70%) were weaned from support, there was one hospital death, and 6 patients were discharged from hospital. Two sudden deaths occurred in the first 8 months after discharge. Four patients (40%) were still alive after follow-up of 11-55 months, with no restriction in their daily activities. The centrifugal pump is a very cost-effective support system with survival rates comparable to those of more sophisticated devices in short-term ventricular assistance.

show abstract

Centrifugal pumps: description of devices and surgical techniques

Cited by 27 publications

References 11 publications

Postcardiotomy Centrifugal Assist: A Single Surgeon's Experience

Postcardiotomy Centrifugal Assist: A Single Surgeon's Experience

Hemolytic Performance of a MagLev Disposable Rotary Blood Pump (MedTech Dispo): Effects of MagLev Gap Clearance and Surface Roughness

Postoperative Mechanical Circulatory Support with Biomedicus Centrifugal Pump

Contact Info

Product

Resources

About