Apparatus and method for evaluating tissue engineered biological material
An apparatus and method that allows the visualization of leakage of cell culture media through a conduit wall of a tissue-engineered biological construct such as a semilunar heart valve or valve graft under controlled physiologic conditions. The apparatus and method also allows for the assessment of valve function and intraluminal flow using conventional imaging modalities such as ultrasonic and magnetic resonance imaging. The apparatus allows the qualitative and quantitative evaluation of structural and functional characteristics of a condition tissue engineered construct prior to implantation using a valve housing and chamber and a flow-pressure simulator.
1. An apparatus for evaluating a structure and function of a tissue-engineered construct under sterile conditions, said apparatus comprising:
(a) a base for supporting the tissue-engineered construct, said base including a housing having an inlet port and an outlet port;
(b) a main fluid circuit for allowing flow of a fluid media through said housing, said main fluid circuit having an efferent section in fluid communication with said outlet port and an afferent section in fluid communication with said inlet port;
(c) pressure means in fluid communication with said main fluid circuit for generating physiologic flow of the fluid media through said main fluid circuit;
(d) resistance means in fluid communication with said main fluid circuit for replicating an afterload characteristic, said resistance means positioned distal to the tissue-engineered construct on said efferent section of said main circuit;
(e) compressible container placed in fluid communication with said housing for allowing radial movement of the said tissue-engineered construct during the flow of said fluid media through said main fluid circuit; and
(f) control means in electronic communication with said pressure means for adjustably controlling the pressure of the fluid media in said main fluid circuit at a level which replicates intraluminal flow, wherein said intraluminal flow of said fluid through said main fluid circuit hemodynamically conditions the tissue-engineered construct prior to in vivo implantation in a ventricular outflow tract.
2. The apparatus according to claim 1 , wherein said container comprises a closed bag compliance reservoir.