Flow behavior within the 12-cc Penn State pulsatile pediatric ventricular assist device: An experimental study of the initial design

Keefe B. Manning, Brandon D. Wivholm, Ning Yang, Arnold Anthony Fontaine, Steven Deutsch

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

Planar particle image velocimetry was used to explore the flow behavior of the newly designed 12-cc Penn State pneumatic pediatric assist pump. Wall shear maps complemented the velocity data. Bjork-Shiley Monostrut 17-mm mechanical heart valves were used in the inlet and outlet ports. In comparison with larger Penn State pumps, the 12-cc device is not only smaller but has reduced valve effective orifice areas and more highly angled valve ports. In contrast to results from the larger pumps, the flow field was highly three dimensional during early diastole with poorer penetration by the valve inlet jet. This led to a later start to a "wall washing" rotational pattern. A significant separation region, never before observed, was created upstream of the outlet valve leaflet during late diastole - effectively reducing the area and increasing the pressure drop through the valve. Wall shear maps suggest that regions of low shear might persist throughout the cycle at the bottom of the pump on the outlet side. An attempt to improve the flow field characteristics by exploring different valves, valve orientations and inlet valve angles, systolic/diastolic flow timing, and perhaps a larger outlet valve was planned.

Original languageEnglish (US)
Pages (from-to)442-452
Number of pages11
JournalArtificial Organs
Volume32
Issue number6
DOIs
StatePublished - Jun 2008

Fingerprint

Pediatrics
Heart-Assist Devices
Diastole
Pumps
Shear walls
Rheology
Heart Valves
Flow fields
Pressure
Equipment and Supplies
Orifices
Washing
Velocity measurement
Pneumatics
Pressure drop

All Science Journal Classification (ASJC) codes

  • Biophysics

Cite this

@article{b0a48a9416e34626b701edabdbd91d9f,
title = "Flow behavior within the 12-cc Penn State pulsatile pediatric ventricular assist device: An experimental study of the initial design",
abstract = "Planar particle image velocimetry was used to explore the flow behavior of the newly designed 12-cc Penn State pneumatic pediatric assist pump. Wall shear maps complemented the velocity data. Bjork-Shiley Monostrut 17-mm mechanical heart valves were used in the inlet and outlet ports. In comparison with larger Penn State pumps, the 12-cc device is not only smaller but has reduced valve effective orifice areas and more highly angled valve ports. In contrast to results from the larger pumps, the flow field was highly three dimensional during early diastole with poorer penetration by the valve inlet jet. This led to a later start to a {"}wall washing{"} rotational pattern. A significant separation region, never before observed, was created upstream of the outlet valve leaflet during late diastole - effectively reducing the area and increasing the pressure drop through the valve. Wall shear maps suggest that regions of low shear might persist throughout the cycle at the bottom of the pump on the outlet side. An attempt to improve the flow field characteristics by exploring different valves, valve orientations and inlet valve angles, systolic/diastolic flow timing, and perhaps a larger outlet valve was planned.",
author = "Manning, {Keefe B.} and Wivholm, {Brandon D.} and Ning Yang and Fontaine, {Arnold Anthony} and Steven Deutsch",
year = "2008",
month = "6",
doi = "10.1111/j.1525-1594.2008.00565.x",
language = "English (US)",
volume = "32",
pages = "442--452",
journal = "Artificial Organs",
issn = "0160-564X",
publisher = "Wiley-Blackwell",
number = "6",

}

Flow behavior within the 12-cc Penn State pulsatile pediatric ventricular assist device : An experimental study of the initial design. / Manning, Keefe B.; Wivholm, Brandon D.; Yang, Ning; Fontaine, Arnold Anthony; Deutsch, Steven.

In: Artificial Organs, Vol. 32, No. 6, 06.2008, p. 442-452.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Flow behavior within the 12-cc Penn State pulsatile pediatric ventricular assist device

T2 - An experimental study of the initial design

AU - Manning, Keefe B.

AU - Wivholm, Brandon D.

AU - Yang, Ning

AU - Fontaine, Arnold Anthony

AU - Deutsch, Steven

PY - 2008/6

Y1 - 2008/6

N2 - Planar particle image velocimetry was used to explore the flow behavior of the newly designed 12-cc Penn State pneumatic pediatric assist pump. Wall shear maps complemented the velocity data. Bjork-Shiley Monostrut 17-mm mechanical heart valves were used in the inlet and outlet ports. In comparison with larger Penn State pumps, the 12-cc device is not only smaller but has reduced valve effective orifice areas and more highly angled valve ports. In contrast to results from the larger pumps, the flow field was highly three dimensional during early diastole with poorer penetration by the valve inlet jet. This led to a later start to a "wall washing" rotational pattern. A significant separation region, never before observed, was created upstream of the outlet valve leaflet during late diastole - effectively reducing the area and increasing the pressure drop through the valve. Wall shear maps suggest that regions of low shear might persist throughout the cycle at the bottom of the pump on the outlet side. An attempt to improve the flow field characteristics by exploring different valves, valve orientations and inlet valve angles, systolic/diastolic flow timing, and perhaps a larger outlet valve was planned.

AB - Planar particle image velocimetry was used to explore the flow behavior of the newly designed 12-cc Penn State pneumatic pediatric assist pump. Wall shear maps complemented the velocity data. Bjork-Shiley Monostrut 17-mm mechanical heart valves were used in the inlet and outlet ports. In comparison with larger Penn State pumps, the 12-cc device is not only smaller but has reduced valve effective orifice areas and more highly angled valve ports. In contrast to results from the larger pumps, the flow field was highly three dimensional during early diastole with poorer penetration by the valve inlet jet. This led to a later start to a "wall washing" rotational pattern. A significant separation region, never before observed, was created upstream of the outlet valve leaflet during late diastole - effectively reducing the area and increasing the pressure drop through the valve. Wall shear maps suggest that regions of low shear might persist throughout the cycle at the bottom of the pump on the outlet side. An attempt to improve the flow field characteristics by exploring different valves, valve orientations and inlet valve angles, systolic/diastolic flow timing, and perhaps a larger outlet valve was planned.

UR - http://www.scopus.com/inward/record.url?scp=44849138443&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=44849138443&partnerID=8YFLogxK

U2 - 10.1111/j.1525-1594.2008.00565.x

DO - 10.1111/j.1525-1594.2008.00565.x

M3 - Article

C2 - 18422800

AN - SCOPUS:44849138443

VL - 32

SP - 442

EP - 452

JO - Artificial Organs

JF - Artificial Organs

SN - 0160-564X

IS - 6

ER -