Fluid mechanical analysis at closure of the On-X mechanical heart valve

Christopher M. Haggerty, Luke H. Herbertson, Steven Deutsch, Keefe B. Manning

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Three-dimensional laser Doppler velocimetry (LDV) was used to characterize the flow created by the On-X bileaflet mechanical heart valve (MHV) manufactured by Medical Carbon Research Institute (MCRI), Inc. (Austin, TX). The valve was mounted into a pneumatically driven single-shot chamber in the mitral position such that only the closure dynamics were simulated. Measurements taken 2 mm proximal to the valve housing showed a peak velocity of 1.8 m/s and maximum Reynolds Shear Stresses (RSS) of 17,500 dynes/cm2, which were found along the centerline of the valve in the hinge region 2 ms after valve closure. The large velocity and RSS gradients denote the presence of complex flow structures. These results provide an initial basis for understanding the impact of valve geometry on hemolysis and thrombosis associated with the On-X MHV.

Original languageEnglish (US)
Title of host publicationProceedings of the ASME Summer Bioengineering Conference 2007, SBC 2007
Pages687-688
Number of pages2
StatePublished - 2007
Event2007 ASME Summer Bioengineering Conference, SBC 2007 - Keystone, CO, United States
Duration: Jun 20 2007Jun 24 2007

Other

Other2007 ASME Summer Bioengineering Conference, SBC 2007
CountryUnited States
CityKeystone, CO
Period6/20/076/24/07

Fingerprint

Shear stress
Fluids
Hinges
Flow structure
Velocity measurement
Carbon
Geometry
Lasers
austin

All Science Journal Classification (ASJC) codes

  • Bioengineering
  • Mechanical Engineering

Cite this

Haggerty, C. M., Herbertson, L. H., Deutsch, S., & Manning, K. B. (2007). Fluid mechanical analysis at closure of the On-X mechanical heart valve. In Proceedings of the ASME Summer Bioengineering Conference 2007, SBC 2007 (pp. 687-688)
Haggerty, Christopher M. ; Herbertson, Luke H. ; Deutsch, Steven ; Manning, Keefe B. / Fluid mechanical analysis at closure of the On-X mechanical heart valve. Proceedings of the ASME Summer Bioengineering Conference 2007, SBC 2007. 2007. pp. 687-688
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abstract = "Three-dimensional laser Doppler velocimetry (LDV) was used to characterize the flow created by the On-X bileaflet mechanical heart valve (MHV) manufactured by Medical Carbon Research Institute (MCRI), Inc. (Austin, TX). The valve was mounted into a pneumatically driven single-shot chamber in the mitral position such that only the closure dynamics were simulated. Measurements taken 2 mm proximal to the valve housing showed a peak velocity of 1.8 m/s and maximum Reynolds Shear Stresses (RSS) of 17,500 dynes/cm2, which were found along the centerline of the valve in the hinge region 2 ms after valve closure. The large velocity and RSS gradients denote the presence of complex flow structures. These results provide an initial basis for understanding the impact of valve geometry on hemolysis and thrombosis associated with the On-X MHV.",
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Haggerty, CM, Herbertson, LH, Deutsch, S & Manning, KB 2007, Fluid mechanical analysis at closure of the On-X mechanical heart valve. in Proceedings of the ASME Summer Bioengineering Conference 2007, SBC 2007. pp. 687-688, 2007 ASME Summer Bioengineering Conference, SBC 2007, Keystone, CO, United States, 6/20/07.

Fluid mechanical analysis at closure of the On-X mechanical heart valve. / Haggerty, Christopher M.; Herbertson, Luke H.; Deutsch, Steven; Manning, Keefe B.

Proceedings of the ASME Summer Bioengineering Conference 2007, SBC 2007. 2007. p. 687-688.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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N2 - Three-dimensional laser Doppler velocimetry (LDV) was used to characterize the flow created by the On-X bileaflet mechanical heart valve (MHV) manufactured by Medical Carbon Research Institute (MCRI), Inc. (Austin, TX). The valve was mounted into a pneumatically driven single-shot chamber in the mitral position such that only the closure dynamics were simulated. Measurements taken 2 mm proximal to the valve housing showed a peak velocity of 1.8 m/s and maximum Reynolds Shear Stresses (RSS) of 17,500 dynes/cm2, which were found along the centerline of the valve in the hinge region 2 ms after valve closure. The large velocity and RSS gradients denote the presence of complex flow structures. These results provide an initial basis for understanding the impact of valve geometry on hemolysis and thrombosis associated with the On-X MHV.

AB - Three-dimensional laser Doppler velocimetry (LDV) was used to characterize the flow created by the On-X bileaflet mechanical heart valve (MHV) manufactured by Medical Carbon Research Institute (MCRI), Inc. (Austin, TX). The valve was mounted into a pneumatically driven single-shot chamber in the mitral position such that only the closure dynamics were simulated. Measurements taken 2 mm proximal to the valve housing showed a peak velocity of 1.8 m/s and maximum Reynolds Shear Stresses (RSS) of 17,500 dynes/cm2, which were found along the centerline of the valve in the hinge region 2 ms after valve closure. The large velocity and RSS gradients denote the presence of complex flow structures. These results provide an initial basis for understanding the impact of valve geometry on hemolysis and thrombosis associated with the On-X MHV.

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Haggerty CM, Herbertson LH, Deutsch S, Manning KB. Fluid mechanical analysis at closure of the On-X mechanical heart valve. In Proceedings of the ASME Summer Bioengineering Conference 2007, SBC 2007. 2007. p. 687-688