Mechanical Hemodynamic Support

Schartel, Scott A.; Pai, Sheela S.

doi:10.1007/978-0-387-77452-7_48

Cited by 2 publications

(1 citation statement)

References 24 publications

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“…The POLVAD prosthesis is an extracorporeal pneumatic heart assist device. Its construction is similar to that of other heart assist devices of such a type (Thoratec VAD’s [12], AB5000 [2,13], Berlin Heart Excor [14], etc. ), therefore the solutions developed for the Polish prosthesis can be implemented in similar pneumatic heart assist devices solutions (e.g.…”

Section: Introductionmentioning

confidence: 99%

Acoustic system for the estimation of the temporary blood chamber volume of the POLVAD heart supporting prosthesis

Konieczny

Opilski

Pustelny

et al. 2012

BioMedical Engineering OnLine

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BackgroundThe paper presents a newly researched acoustic system for blood volume measurements for the developed family of Polish ventricular assist devices. The pneumatic heart-supporting devices are still the preferred solution in some cases, and monitoring of their operation, especially the temporary blood volume, is yet to be solved.MethodsThe prototype of the POLVAD-EXT prosthesis developed by the Foundation of Cardiac Surgery Development, Zabrze, Poland, is equipped with the newly researched acoustic blood volume measurement system based on the principle of Helmholtz’s acoustic resonance. The results of static volume measurements acquired using the acoustic sensor were verified by measuring the volume of the liquid filling the prosthesis. Dynamic measurements were conducted on the hybrid model of the human cardiovascular system at the Foundation, with the Transonic T410 (11PLX transducer - 5% uncertainty) ultrasound flow rate sensor, used as the reference.ResultsThe statistical analysis of a series of static tests have proved that the sensor solution provides blood volume measurement results with uncertainties (understood as a standard mean deviation) of less than 10%. Dynamic tests show a high correlation between the results of the acoustic system and those obtained by flow rate measurements using an ultrasound transit time type sensor.ConclusionsThe results show that noninvasive, online temporary blood volume measurements in the POLVAD-EXT prosthesis, making use of the newly developed acoustic system, provides accurate static and dynamic measurements results. Conducted research provides the preliminary view on the possibility of reducing the additional sensor chamber volume in future.

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Section: Introductionmentioning

confidence: 99%

Acoustic system for the estimation of the temporary blood chamber volume of the POLVAD heart supporting prosthesis

Konieczny

Opilski

Pustelny

et al. 2012

BioMedical Engineering OnLine

View full text Add to dashboard Cite

show abstract

Optoelectronic system for the determination of blood volume in pneumatic heart assist devices

et al. 2015

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BackgroundThe following article describes the concept of optical measurement of blood volume in ventricular assist devices (VAD’s) of the pulsatile type. The paper presents the current state of art in blood volume measurements of such devices and introduces a newly developed solution in the optic domain. The objective of the research is to overcome the disadvantages of the previously developed acoustic method—the requirement of additional sensor chamber.MethodsThe idea of a compact measurement system has been introduced, followed by laboratory measurements. Static tests of the system have been presented, followed by dynamic measurements on a physical model of the human ventricular system. The results involving the measurements of blood chamber volume acquired by means of an optical system have been compared with the results acquired by means of the Transonic T410 ultrasound flow rate sensor (11PLX transducer, uncertainty ±5 %).ResultsPreliminary dynamic measurements conducted on the physical model of the human cardiovascular system show that the proposed optical measurement system may be used to measure the transient blood chamber volumes of pulsatile VAD’s with the uncertainties (standard mean deviation) lower than 10 %.ConclusionsThe results show that the noninvasive measurements of the temporary blood chamber volume in the POLVAD prosthesis with the use of the developed optical system allows us to carry out accurate static and dynamic measurements.

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Mechanical Hemodynamic Support

Cited by 2 publications

References 24 publications

Acoustic system for the estimation of the temporary blood chamber volume of the POLVAD heart supporting prosthesis

Acoustic system for the estimation of the temporary blood chamber volume of the POLVAD heart supporting prosthesis

Optoelectronic system for the determination of blood volume in pneumatic heart assist devices

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