Determination of the mechanical losses of the Penn State electrical ventricular assist device

2003 ◽  
Author(s):  
C.W. Tsui ◽  
U. Tsach ◽  
D.B. Geselowitz
Keyword(s):  
Ventricular Assist Device ◽  
Assist Device ◽  
Ventricular Assist ◽  
Penn State

THE VISCOELASTIC EFFECTS WITHIN THE PENN STATE PEDIATRIC VENTRICULAR ASSIST DEVICE

ASAIO Journal ◽  
2006 ◽  
Vol 52 (2) ◽  
pp. 62A
Author(s):  
Jennifer A Long ◽  
Keefe B Manning ◽  
Akif Undar ◽  
Steven Deutsch
Keyword(s):  
Ventricular Assist Device ◽  
Assist Device ◽  
Ventricular Assist ◽  
Viscoelastic Effects ◽  
Penn State

Anatomic Fit Assessment for the Penn State Pediatric Ventricular Assist Device

ASAIO Journal ◽  
2007 ◽  
Vol 53 (6) ◽  
pp. 687-691 ◽  
Author(s):  
John M. Connell ◽  
Tigran Khalapyan ◽  
John L. Myers ◽  
Gerson Rosenberg ◽  
William J. Weiss
Keyword(s):  
Ventricular Assist Device ◽  
Assist Device ◽  
Ventricular Assist ◽  
Penn State

A Fluid Dynamics Study Focusing on Wall Shear Rates Within the Penn State 12 cc Pulsatile Pediatric Ventricular Assist Device: A Comparison of Mechanical Heart Valve Types

2007 ◽  
Author(s):  
Benjamin T. Cooper ◽  
Breigh N. Roszelle ◽  
Tobias C. Long ◽  
Steven Deutsch ◽  
Keefe B. Manning
Keyword(s):  
Ventricular Assist Device ◽  
Mechanical Heart Valve ◽  
Flow Characteristics ◽  
Assist Device ◽  
Ventricular Assist ◽  
Recirculating Flow ◽  
Image Velocimetry ◽  
Penn State ◽  
Wall Shear ◽  
Pulsatile Vad

Previous studies have shown that the interrelated flow characteristics necessary for the prevention of thrombosis in a pulsatile ventricular assist device (VAD) are a strong inlet jet, a late diastolic recirculating flow, and adequate wall washing (greater than 500 s−1). Particle image velocimetry was used to compare the flow fields in the chamber of the 12 cc Penn State pediatric pulsatile VAD using two valves: Björk-Shiley Monostrut (BSM) tilting-disc valves at the inlet and outlet and Carbomedics (CM) bi-leaflet valves at the inlet and outlet. In conjunction with the flow evaluation, wall shear data were calculated and analyzed to help to quantify wall washing. The major orifice inlet jet of the device containing BSM valves was more intense which led to better circulation and wall washing than the three jets produced by the CM valves Regurgitation through the CM valve was observed and served as a significant hindrance to the development of the rotational flow.

The 12 cc Penn State Pulsatile Pediatric Ventricular Assist Device: Flow Field Observations at a Reduced Beat Rate With Application to Weaning

ASAIO Journal ◽  
2008 ◽  
Vol 54 (3) ◽  
pp. 325-331 ◽  
Author(s):  
Breigh N. Roszelle ◽  
Benjamin T. Cooper ◽  
Tobias C. Long ◽  
Steven Deutsch ◽  
Keefe B. Manning
Keyword(s):  
Flow Field ◽  
Ventricular Assist Device ◽  
Field Observations ◽  
Assist Device ◽  
Ventricular Assist ◽  
Beat Rate ◽  
Penn State
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