Outflow monitoring of a pneumatic ventricular assist device using external pressure sensors
- Authors
- Kang, Seong Min; Her, Keun; Choi, Seong Wook
- Issue Date
- 25-Aug-2016
- Publisher
- BioMed Central
- Keywords
- 흉부외과학
- Citation
- BioMedical Engineering Online, v.15
- Journal Title
- BioMedical Engineering Online
- Volume
- 15
- URI
- https://scholarworks.bwise.kr/sch/handle/2021.sw.sch/8842
- DOI
- 10.1186/s12938-016-0204-z
- ISSN
- 1475-925X
- Abstract
- Background: In this study, a new algorithm was developed for estimating the pump outflow of a pneumatic ventricular assist device (p-VAD). The pump outflow estimation algorithm was derived from the ideal gas equation and determined the change in blood-sac volume of a p-VAD using two external pressure sensors. Objectives: Based on in vitro experiments, the algorithm was revised to consider the effects of structural compliance caused by volume changes in an implanted unit, an air driveline, and the pressure difference between the sensors and the implanted unit. Methods: In animal experiments, p-VADs were connected to the left ventricles and the descending aorta of three calves (70-100 kg). Their outflows were estimated using the new algorithm and compared to the results obtained using an ultrasonic blood flow meter (UBF) (TS-410, Transonic Systems Inc., Ithaca, NY, USA). Results: The estimated and measured values had a Pearson's correlation coefficient of 0.864. The pressure sensors were installed at the external controller and connected to the air driveline on the same side as the external actuator, which made the sensors easy to manage.
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- Appears in
Collections - College of Medicine > Department of Cardiovascular Surgery > 1. Journal Articles
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