CARMAT heart > Technology > Prosthesis

Prosthesis

The prosthesis consists of two, right and left, ventricular cavities containing 2 volume spaces each separated by a flexible bio-membrane, one for blood and one for the actioning fluid.
A flexible external bag contains the actioning fluid and beats at the same rate as a native heart would. 
Through hydraulic action via two miniature motorised pump sets, the actioning fluid displaces this bio-membrane, reproducing the movement of the ventricular wall of the human heart during contraction. This movement causes admission and ejection of blood under optimal conditions: usual movement, contact only with biologically compatible materials.

An integrated electronic device regulates how the prosthesis operates according to patients' needs and using information given by sensors and processed by a microprocessor.

The internal layout of the CARMAT heart has been the subject of continuous optimisation to minimise the space occupied by the components and to maximise ventricular volume, thus ensuring the necessary blood flow in all circumstances without artificially increasing the operating frequency
The implantation method is also very similar to that of a cardiac transplant.  A biocompatible interface device is sutured to the auricles and the prosthesis is then simply clicked onto this device.

Image-Biomembranes

Two motor pump units (A) alternately suck and inject a fluid into the ventricular cavities (B) thus moving the flexible biomembrane (C)... When the hydraulic compartment empties, withdrawal of the biomembrane sucks blood into the ventricle – When it is filled up, the biomembrane pumps blood into the arteries. Biological admission  (D) and ejection (E) valves ensure that the blood only flows in one direction.


© CARMAT - Operating details of the CARMAT heart