TITLE

In vitro assessment of the vacuum-assisted venous drainage (VAVD) system: risks and benefits

AUTHOR(S)
Fiorucci, Angelo; Germetta, Pier Silvio; DeVecchi, Massimo; Guzman, Cesare; Costantino, Maria Laura; Arena, Vincenzo
PUB. DATE
March 2004
SOURCE
Perfusion;Mar2004, Vol. 19 Issue 2, p113
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The vacuum-assisted venous drainage (VAVD) technique has been introduced with the utilization of small-bore venous cannulae to facilitate minimally invasive cardiac surgery and it has found widespread use for traditional surgical approaches. Although this technique was devised to increase venous return, it may cause a reduction of blood flow through a negative pressure effect on the raceway tubing. In this study, the potential of this system to increase the venous drainage was evaluated in vitro together with the measurements of delivered blood flow. The VAVD has been tested in association with normal gravitational drainage or as a substitute for gravitational drainage. The flow was calculated by multiplying the pump rate by the stroke volume and it was simultaneously measured by a magnetic flowmeter. A steady state maximal flow was defined as the flow that could maintain a constant level of fluid in the graduated canister used to act as the patient. Based on our results, the VAVD can increase venous drainage by as much as 50% above baseline levels. However, delivered blood flow may be overestimated, particularly when negative pressure values >60 mmHg are employed. A 100 mmHg negative pressure may produce an overestimate of blood flow as great as 54% of the measured flow.
ACCESSION #
12972927

 

Related Articles

  • Poly(ADP-ribose) polymerase inhibition attenuates biventricular reperfusion injury after orthotopic heart transplantation Szabó, Gábor; Soós, Pál; Heger, Ulrike; Flechtenmacher, Christa; Bährle, Susanne; Zsengellér, Zsuzsanna; Szabó, Csaba; Hagl, Siegfried // European Journal of Cardio-Thoracic Surgery;Feb2005, Vol. 27 Issue 2, p226 

    Abstract: Objective: Poly (ADP-ribose) polymerase (PARP) activation plays a key role in free radical induced injury in ischemia/reperfusion. We investigated the effects of INO-1001 a novel PARP inhibitor on postischemic myocardial and endothelial function. Methods: In dogs, 12 orthotopic heart...

  • Pump-induced haemolysis: a comparison of short-term ventricular assist devices. Bennett, M.; Horton, S.; Thuys, C.; Augustin, S.; Rosenberg, M.; Brizard, C. // Perfusion;Mar2004, Vol. 19 Issue 2, p107 

    Centrifugal pumps are superior to roller pumps for extended support durations in terms of pump-induced haemolysis. In this study, we evaluated the commonly used Biomedicus BP 50 and compared it with the Jostra Rotaflow and a standard roller pump in an in vitro test circuit. Each circuit was run...

  • The Local Regulation of Blood Flow Evaluated Simultaneously by 133-Xenon Washout and Laser Doppler Flowmetry. Engelhart, Merete; Petersen, Lars Jelstrup; Kristensen, Johannes Keldstrup // Journal of Investigative Dermatology;Nov88, Vol. 91 Issue 5, p451 

    The laser Doppler flow meter and the 133-Xenon washout techniques of measuring cutaneous blood flow were compared for measuring the vasoconstrictor response of the hand during orthostatic maneuvres. Important discrepancies were detected for the two methods. When the hand was lowered by 40 cm a...

  • Reproducibility of the Heidelberg retinal flowmeter in determining low perfusion areas in peripapillary retina. Jonescu-Cuypers, C. P.; Harris, A.; Wilson, R.; Kagemann, L.; Mavroudis, L. V.; Topouzis, F.; Coleman, A. L. // British Journal of Ophthalmology;Oct2004, Vol. 88 Issue 10, p1266 

    Aim: To evaluate the interobserver variability and retest reproducibility of confocal scanning laser Doppler flowmeter in measuring capillary perfusion of the peripapillary retina. Methods: Blood flow measurements were performed in one eye of 10 normal subjects by two investigators on two...

  • Theory and validation of access flow measurement by dilution technique during hemodialysis. Krivitski, Nikolai M. // Kidney International;Jul1995, Vol. 48 Issue 1, p244 

    The theory shows that access flow can be measured by the dilution technique by reversal of the blood dialysis lines with the venous outlet facing the access stream; (1.) with one dilution sensor in arterial line and two injections Equation (6); (2.) with two matched dilution sensors on the...

  • `Octopus' Aids Open-Heart Surgery.  // USA Today Magazine;Feb99, Vol. 127 Issue 2645, p4 

    Discusses the benefits of Octopus, a piece of equipment that allows surgeons to perform open-heart surgery on a beating heart. How the instrument is used; How traditional open heart surgery is performed; Comparison between surgery with Octopus and the traditional open heart surgery.

  • Improved hydrodynamics of a new aortic cannula with a novel tip design. Scharfschwerdt, Michael; Richter, Axel; Boehmer, Kurt; Repenning, Detlef; Sievers, Hans-H. // Perfusion;May2004, Vol. 19 Issue 3, p193 

    Background: Reduction of atheroembolic complications during cardiopulmonary bypass remains a major challenge in cardiac surgery. New cannula tip designs may help to attenuate this problem by improved hydrodynamics. Methods: Pressure gradients and back pressures of a new aortic cannula tip design...

  • Early metabolic and splanchnic responses to enteral nutrition in postoperative cardiac surgery patients with circulatory compromise. Revelly, Jean-Pierre; Tappy, Luc; Berger, Mette M.; Gersbach, Philippe; Cayeux, Christine; Chioléro, René; Revelly, J P; Tappy, L; Berger, M M; Gersbach, P; Cayeux, C; Chioléro, R // Intensive Care Medicine;Mar2001, Vol. 27 Issue 3, p540 

    Objectives: To assess the hemodynamic and metabolic adaptations to enteral nutrition (EN) in patients with hemodynamic compromise.Design and Setting: Prospective study in a university hospital surgical ICU, comparing baseline (fasted) with continuous EN...

  • Computational fluid—structure interaction: methods and application to a total cavopulmonary connection. Bazilevs, Yuri; Hsu, M.-C.; Benson, D. J.; Sankaran, S.; Marsden, A. L. // Computational Mechanics;Dec2009, Vol. 45 Issue 1, p77 

    The Fontan procedure is a surgery that is performed on single-ventricle heart patients, and, due to the wide range of anatomies and variations among patients, lends itself nicely to study by advanced numerical methods. We focus on a patient-specific Fontan configuration, and perform a fully...

Share

Read the Article

Courtesy of

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics