In vivo testing of a right heart mini-pump during a 24 hour period: is it safe?

Details

Serval ID
serval:BIB_D91F3D2F880C
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
In vivo testing of a right heart mini-pump during a 24 hour period: is it safe?
Journal
ASAIO Journal
Author(s)
Mueller  X. M., Augstburger  M., Boone  Y., Tevaearai  H. T., von Segesser  L. K.
ISSN
1058-2916
Publication state
Published
Issued date
12/2002
Peer-reviewed
Oui
Volume
48
Number
6
Pages
582-5
Notes
Journal Article --- Old month value: Nov-Dec
Abstract
A coaxial atrial cannula connected to a mini-centrifugal pump was developed to bypass the right heart during extreme exposures in off-pump coronary artery bypass surgery. This study was designed to test the effect of this pump, running during 24 hours, on blood elements to evaluate its use as a prolonged right heart support. In a calf model (body weight 68+/-5 kg), the pump was inserted and set to its maximal motor speed of 7000 rpm. Blood samples were drawn every 6 hours for blood gas analyses, as well as for hematology and chemistry. The right heart mini-pump performed perfectly at its maximal speed over the 24 hour period. Blood gas parameters and blood lactate levels reflected adequate tissue perfusion (baseline: 2.2+/-0.5 mmol/L vs. 24 h: 2+/-0.3 mmol/L; p = 0.64). Red blood cell count was stable (baseline: 9.8+/-1.4 x 10(12)/L vs. 24 h: 9.6+/-1.1 x 10(12)/L; p = 0.83). Free plasma hemoglobin remained below 100 mg/L throughout the experiment. Platelet count was stable during the first 6 hours and exhibited a tendency to drop thereafter (baseline: 749+/-104 x 10(9)/L vs. 24 h: 486+/-20 x 10(9)/L; p = 0.01). This right heart mini-pump appears to provide sufficient blood flow during a 24 hour period with minimal impact on red cell and moderate platelet damage after 6 hours. These results suggest a potential application of this system for postcardiotomy right heart support.
Keywords
Animals Blood Pressure Cattle Coronary Artery Bypass/*instrumentation Equipment Design Erythrocyte Count Heart Rate *Heart-Assist Devices Hematocrit Hemoglobins Lactic Acid/blood Oxygen/blood Platelet Count
Pubmed
Web of science
Create date
14/02/2008 14:17
Last modification date
20/08/2019 15:58
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