Zobrazeno 1 - 10
of 47
pro vyhledávání: '"Mary J. Watach"'
Autor:
J Tomioka, Mitsuo Umezu, Marina V. Kameneva, Takehide Akimoto, Kenneth N. Litwak, Kenji Yamazaki, Bartley P. Griffith, Robert L. Kormos, Shin ' ichiro Kihara, Osamu Tagusari, Mary J. Watach, Hitoshi Koyanagi, Shun Ich Yamazaki, Philip Litwak
Publikováno v:
Artificial Organs. 25:724-727
We tried to verify the hypothesis that increases in pump flow during diastole are matched by decreases in left ventricular (LV) output during systole. A calf (80 kg) was implanted with an implantable centrifugal blood pump (EVAHEART, SunMedical Techn
The HeartMate III: Design and In Vivo Studies of a Maglev Centrifugal Left Ventricular Assist Device
Autor:
Mary J. Watach, R. Schoeb, Andreas Fleischli, P. Litwak, Natale Barletta, Thomas Gempp, G. Foiera, Victor Poirier, Kevin Bourque, Takehide Akimoto, D. Gernes, Marina V. Kameneva, J. S. Richardson, Howard M. Loree, Kenneth N. Litwak
Publikováno v:
Artificial Organs. 25:386-391
A compact implantable centrifugal left ventricular assist device (LVAD) (HeartMate III) featuring a magnetically levitated impeller is under development. The goal of our ongoing work is to demonstrate feasibility, low hemolysis, and low thrombogenici
Autor:
Mary J. Watach, Mitsuo Umezu, Osamu Tagusari, Kenneth N. Litwak, Philip Litwak, Marina V. Kameneva, Kenji Yamazaki, James F. Antaki, Hitoshi Koyanagi, Toshio Mori, Takehide Akimoto, Robert L. Kormos, Bartley P. Griffith, J Tomioka
Publikováno v:
ASAIO Journal. 46:596-599
The purpose of this study was to evaluate the real time relationship between pump flow and pump differential pressure (D-P) during experimentally induced hypertension (HT). Two calves (80 and 68 kg) were implanted with the EVAHEART centrifugal blood
Autor:
Osamu Tagusari, Mary J. Watach, Hitoshi Koyanagi, James F. Antaki, Toshio Mori, Bartley P. Griffith, Takehide Akimoto, Marina V. Kameneva, Kenji Yamazaki, Mitsuo Umezu, Kenneth N. Litwak, Robert L. Kormos, Jun Tomioka, Philip Litwak
Publikováno v:
Artificial Organs. 23:797-801
Many types of rotary blood pumps and pump control methods have recently been developed with the goal of clinical use. From experiments, we know that pump flow spontaneously increases during exercise without changing pump control parameters. The purpo
Autor:
James F. Antaki, Marina V. Kameneva, Robert L. Kormos, Harvey S. Borovetz, Mary J. Watach, Philip Litwak, D. Thomas, Bartley P. Griffith, Lynn P. Taylor, Kenneth C. Butler
Publikováno v:
ASAIO Journal. 45:183-188
Chronic testing of the Nimbus/UOP Axial Flow Pump was performed on 22 calves for periods of implantation ranging from 27 to 226 days (average, 74 days). The following parameters were measured: plasma free hemoglobin, blood and plasma viscosity, eryth
Autor:
William R. Wagner, Mary J. Watach, Philip Litwak, Kenji Yamazaki, Linda C. Baker, Jacqueline Autieri, William C. Davis
Publikováno v:
Journal of Biomedical Materials Research. 41:312-321
Cardiovascular device development often relies upon large-animal models to assess blood biocompatibility prior to initiating clinical trials. Unfortunately, the amount of information gleaned from such trials is limited by simple assays that do not ta
Autor:
Robert L. Kormos, Lisa Gordon, Kunihisa Kono, Mary J. Watach, Hitoshi Koyanagi, Philip Litwak, Akira Kojima, Edwin Klein, Osamu Tagusari, Toshio Mori, Bartley P. Griffith, James F. Antaki, Kenji Yamazaki
Publikováno v:
Artificial Organs. 22:481-487
The development of a percutaneous artificial internal organ system requires a reliable biocompatible connection between the external environment and the inside of the human body. Such is necessary for the success of a permanent left ventricular assis
Autor:
Robert L. Kormos, Mary J. Watach, James F. Antaki, Marina V. Kameneva, Kenneth C. Butler, Bartley P. Griffith, Krishna K. Yeleswarapu, Harvey S. Borovetz
Publikováno v:
ASAIO Journal. 41:M457-M460
Clinical experience with circulatory support devices has typically shown alteration of patient blood rheology exhibited through increasing blood viscosity and decreasing erythrocyte deformability. Our hemorheologic studies have additionally shown a r
Autor:
Robert L. Kormos, Harvey S. Borovetz, Mary J. Watach, Marina V. Kameneva, Bartley P. Griffith, James F. Antaki, Kenneth C. Butler
Publikováno v:
ASAIO Journal. 40:959-963
Hemorheologic investigations were performed on nine sheep during the in vivo evaluation of a new axial flow ventricular assist device, the Nimbus AxiPump (Nimbus, Inc., Rancho Cordova, CA). Blood hematocrit, plasma and whole blood viscosity, red bloo
Publikováno v:
Biorheology. 31:297-304
We studied the effect of relatively high dosages of heparin (25-150 U/ml) on some rheological parameters of donor blood. It was found that heparin increased the erythrocyte sedimentation rate (ESR) and low shear blood viscosity at all concentrations