Continuously Maintaining Positive Flow Avoids Endocardial Suction of a Rotary Blood Pump with Left Ventricular Bypass
Identifieur interne : 001826 ( Istex/Corpus ); précédent : 001825; suivant : 001827Continuously Maintaining Positive Flow Avoids Endocardial Suction of a Rotary Blood Pump with Left Ventricular Bypass
Auteurs : Takehide Akimoto ; Kenji Yamazaki ; Philip Litwak ; Kenneth N. Litwak ; Osamu Tagusari ; Toshio Mori ; James F. Antaki ; Marina V. Kameneva ; Mary J. Watach ; Mitsuo Umezu ; Jun Tomioka ; Robert L. Kormos ; Hitoshi Koyanagi ; Bartley P. GriffithSource :
- Artificial Organs [ 0160-564X ] ; 2000-08-01.
English descriptors
- KwdEn :
- Aortic, Aortic notch, Aortic valve, Aortic valve opening, Arterial pressure, Artif, Artif organs, Blood pressure, Cardiac, Cardiac cycle, Centrifugal, Centrifugal blood, Centrifugal pumps, Diastole, Diastolic period, Diastolic pressure, Differential pressure, Endocardial suction, Flow blood, Flow state, Flow volume, Heart rate, Hemodynamics, High blood pressure, International society, Litwak, Minimum requirement, Negative flow, Normal heart, Positive flow, Pulmonary flow, Pulsatile pumps, Rotary blood, Suction, Systole, Systolic period, Takehide akimoto, Yamazaki.
- Teeft :
- Aortic, Aortic notch, Aortic valve, Aortic valve opening, Arterial pressure, Artif, Artif organs, Blood pressure, Cardiac, Cardiac cycle, Centrifugal, Centrifugal blood, Centrifugal pumps, Diastole, Diastolic period, Diastolic pressure, Differential pressure, Endocardial suction, Flow blood, Flow state, Flow volume, Heart rate, Hemodynamics, High blood pressure, International society, Litwak, Minimum requirement, Negative flow, Normal heart, Positive flow, Pulmonary flow, Pulsatile pumps, Rotary blood, Suction, Systole, Systolic period, Takehide akimoto, Yamazaki.
Abstract
Abstract: This study showed the usefulness of maintaining positive pump flow to avoid endocardial suction and as an assist bypass. Three calves were implanted with centrifugal pumps. Hemodynamics and pump parameters were measured at varying pump speeds (from 1,100 to 2,300 rpm). In each test pump, speed was adjusted to create 3 hemodynamic states: both positive and negative flow (PNF), positive and zero flow (PZF), and continuously positive flow (CPF). The pump flow volume was determined during systole (Vs) and diastole (Vd). Vs in PNF was 29.6 ml and was not significantly different from Vs in PZF (p > 0.15). Vd in PNF was significantly different from Vd in PZF (p < 0.05). All bypass rates of PNF were over 30% of pulmonary flow. All PZF bypass rates were between the PNF rate and the CPF rate. These data showed that PZF satisfied the minimum requirement of assist flow and was under 100% bypass. Thus, PZF may avoid endocardial suction.
Url:
DOI: 10.1046/j.1525-1594.2000.06581.x
Links to Exploration step
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<front><div type="abstract">Abstract: This study showed the usefulness of maintaining positive pump flow to avoid endocardial suction and as an assist bypass. Three calves were implanted with centrifugal pumps. Hemodynamics and pump parameters were measured at varying pump speeds (from 1,100 to 2,300 rpm). In each test pump, speed was adjusted to create 3 hemodynamic states: both positive and negative flow (PNF), positive and zero flow (PZF), and continuously positive flow (CPF). The pump flow volume was determined during systole (Vs) and diastole (Vd). Vs in PNF was 29.6 ml and was not significantly different from Vs in PZF (p > 0.15). Vd in PNF was significantly different from Vd in PZF (p < 0.05). All bypass rates of PNF were over 30% of pulmonary flow. All PZF bypass rates were between the PNF rate and the CPF rate. These data showed that PZF satisfied the minimum requirement of assist flow and was under 100% bypass. Thus, PZF may avoid endocardial suction.</div>
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<abstract>Abstract: This study showed the usefulness of maintaining positive pump flow to avoid endocardial suction and as an assist bypass. Three calves were implanted with centrifugal pumps. Hemodynamics and pump parameters were measured at varying pump speeds (from 1,100 to 2,300 rpm). In each test pump, speed was adjusted to create 3 hemodynamic states: both positive and negative flow (PNF), positive and zero flow (PZF), and continuously positive flow (CPF). The pump flow volume was determined during systole (Vs) and diastole (Vd). Vs in PNF was 29.6 ml and was not significantly different from Vs in PZF (p > 0.15). Vd in PNF was significantly different from Vd in PZF (p > 0.05). All bypass rates of PNF were over 30% of pulmonary flow. All PZF bypass rates were between the PNF rate and the CPF rate. These data showed that PZF satisfied the minimum requirement of assist flow and was under 100% bypass. Thus, PZF may avoid endocardial suction.</abstract>
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This study showed the usefulness of maintaining positive pump flow to avoid endocardial suction and as an assist bypass. Three calves were implanted with centrifugal pumps. Hemodynamics and pump parameters were measured at varying pump speeds (from 1,100 to 2,300 rpm). In each test pump, speed was adjusted to create 3 hemodynamic states: both positive and negative flow (PNF), positive and zero flow (PZF), and continuously positive flow (CPF). The pump flow volume was determined during systole (Vs) and diastole (Vd). Vs in PNF was 29.6 ml and was not significantly different from Vs in PZF (p > 0.15). Vd in PNF was significantly different from Vd in PZF (p < 0.05). All bypass rates of PNF were over 30% of pulmonary flow. All PZF bypass rates were between the PNF rate and the CPF rate. These data showed that PZF satisfied the minimum requirement of assist flow and was under 100% bypass. Thus, PZF may avoid endocardial suction.</p>
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<correspondenceTo>Address correspondence and reprint requests to Dr. Takehide Akimoto, University of Pittsburgh, Artificial Heart Program, 300 Technology Drive, Pittsburgh, PA, 15219, U.S.A.</correspondenceTo>
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<abstract>Abstract: This study showed the usefulness of maintaining positive pump flow to avoid endocardial suction and as an assist bypass. Three calves were implanted with centrifugal pumps. Hemodynamics and pump parameters were measured at varying pump speeds (from 1,100 to 2,300 rpm). In each test pump, speed was adjusted to create 3 hemodynamic states: both positive and negative flow (PNF), positive and zero flow (PZF), and continuously positive flow (CPF). The pump flow volume was determined during systole (Vs) and diastole (Vd). Vs in PNF was 29.6 ml and was not significantly different from Vs in PZF (p > 0.15). Vd in PNF was significantly different from Vd in PZF (p < 0.05). All bypass rates of PNF were over 30% of pulmonary flow. All PZF bypass rates were between the PNF rate and the CPF rate. These data showed that PZF satisfied the minimum requirement of assist flow and was under 100% bypass. Thus, PZF may avoid endocardial suction.</abstract>
<subject lang="en"><genre>keywords</genre>
<topic>Left ventricular assist device</topic>
<topic>Centrifugal blood pump</topic>
<topic>Hemodynamics</topic>
<topic>Regurgitate flow</topic>
<topic>Endocardial suction‐pump flow volume</topic>
</subject>
<relatedItem type="host"><titleInfo><title>Artificial Organs</title>
</titleInfo>
<titleInfo type="abbreviated"><title>Artificial Organs</title>
</titleInfo>
<genre type="journal" authority="ISTEX" authorityURI="https://publication-type.data.istex.fr" valueURI="https://publication-type.data.istex.fr/ark:/67375/JMC-0GLKJH51-B">journal</genre>
<identifier type="ISSN">0160-564X</identifier>
<identifier type="eISSN">1525-1594</identifier>
<identifier type="DOI">10.1111/(ISSN)1525-1594</identifier>
<identifier type="PublisherID">AOR</identifier>
<part><date>2000</date>
<detail type="volume"><caption>vol.</caption>
<number>24</number>
</detail>
<detail type="issue"><caption>no.</caption>
<number>8</number>
</detail>
<extent unit="pages"><start>606</start>
<end>610</end>
<total>5</total>
</extent>
</part>
</relatedItem>
<identifier type="istex">68B4D57334E05222ED2FC19DF86C4C311482C783</identifier>
<identifier type="ark">ark:/67375/WNG-86RGJKS9-M</identifier>
<identifier type="DOI">10.1046/j.1525-1594.2000.06581.x</identifier>
<identifier type="ArticleID">AOR6581</identifier>
<recordInfo><recordContentSource authority="ISTEX" authorityURI="https://loaded-corpus.data.istex.fr" valueURI="https://loaded-corpus.data.istex.fr/ark:/67375/XBH-L0C46X92-X">wiley</recordContentSource>
<recordOrigin>Blackwell Science Inc</recordOrigin>
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