PMID: 7993196Aug 1, 1994Paper

Novel method to determine instantaneous blood volume in pulsatile blood pump using electrical impedance

Artificial Organs
E SasakiH Hirose


A novel real-time volumetric method was developed for a pulsatile pump. This method, the impedance method, used electrical impedance change in the blood chamber according to volume change while pumping. This method was evaluated with two kinds of air-driven diaphragm pumps. During in vitro tests, the impedance method indicated real-time volume change, and there was excellent correlation between computed stroke volume with the impedance method and measured stroke volume with the electromagnetic flowmeter. In chronic animal tests with goats and in a clinical case, the impedance method measured pump output accurately, and it detected diaphragm motion in real-time. In addition, excellent durability was seen. Full-fill to full-empty drive was realized accurately with this method. Application of the impedance method was easy, and it did not deteriorate native antithrombogencity of the pump. The impedance method is practical and useful to estimate the pumping condition of a pulsatile blood pump, especially a diaphragm pump. This method would be useful in clinical application.


Jan 1, 1979·Transactions - American Society for Artificial Internal Organs·K E BuckG Fountain
Dec 1, 1979·IEEE Transactions on Bio-medical Engineering·K Sakamoto, H Kanai
Jul 1, 1992·ASAIO Journal : a Peer-reviewed Journal of the American Society for Artificial Internal Organs·M ShionoM E DeBakey
Jul 1, 1992·ASAIO Journal : a Peer-reviewed Journal of the American Society for Artificial Internal Organs·T NakataniM Sakaki
Jul 1, 1992·ASAIO Journal : a Peer-reviewed Journal of the American Society for Artificial Internal Organs·A J SnyderR Quinn
Jul 1, 1992·ASAIO Journal : a Peer-reviewed Journal of the American Society for Artificial Internal Organs·H GaoC W Christensen
Jul 1, 1989·ASAIO Transactions·A YaguraT Oh-Umi
Jan 1, 1972·Transactions - American Society for Artificial Internal Organs·S J ColemanJ G Carr
May 1, 1973·Medical & Biological Engineering·L A Geddes, C Sadler
Jan 1, 1986·IEEE Engineering in Medicine and Biology Magazine : the Quarterly Magazine of the Engineering in Medicine & Biology Society·D J FarrarJ D Hill

❮ Previous
Next ❯


Dec 17, 2014·Journal of Artificial Organs : the Official Journal of the Japanese Society for Artificial Organs·Kentaro OhnumaEisuke Tatsumi

❮ Previous
Next ❯

Related Concepts

Trending Feeds


Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.


Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.


Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.