Viscoelastic Impedance Adapter (VIA)

Product Code: VIA7991

The ViVitro Viscoelastic Impedance Adapter (VIA) works in conjunction with the SuperPump pulsatile pump to produce more realistic physiological ventricular pressures. It consists of a fixed resistive element and two adjustable compliance chambers to simulate ventricular viscoelastic behavior. The VIA is installed at the interface between a flow source and a load such as a ViVitro Labs SuperPump (10647) and Model Left Heart (SD2001-1) in a Pulse Duplicator (18363) configuration.

Without a VIA, Pulse Duplicator systems tend to generate high frequency pressure and flow oscillations during closure of the aortic and mitral valve. The influence of the VIA on pressure and flow waveforms has been described in a publication by Jennings et al.

View all of our cardiac and peripheral circulatory loop accessories.

Features

Adjustable dP/dt ratio to produce both physiological and diseased cardiac models
Filters high frequency noise when testing prosthetic valves and aortic conduits
Easily adjusted

Specifications

Fixed resistance: 200 c.g.s. units
Compliance air volumes: SOURCE 0-120 ml, OUTPUT 0-60 ml, syringe adjustable
Total liquid volume: 500 ml with SOURCE / OUTPUT compliance air volumes zero
Materials: Acrylic, Polycarbonate, Delrin, Nylon, Polyethylene, Stainless Steel, Viton
Weight: 1 kg

ViVitro SuperPump with VIA
ViVitro SuperPump with Pump Head and VIA