JPWO2021186009A5 - - Google Patents

Claims (9)

A pressure sensor (100) comprising:
a housing (110) having one opening;
a flexible membrane (120) covering an opening in the housing (110);
a space (170) formed by the housing and the flexible membrane;
a space (170) completely filled with a pressure transmission medium;
the housing further includes a mounting ring (130) surrounding the opening of the housing and configured to attach the pressure sensor to the surface of the object whose pressure value is to be measured;
a pressure sensitive sensor (150) attached to the interior surface of the housing via a circuit board (160) and having one surface that receives pressure transmitted from the membrane by a pressure transmission medium;
the housing and the mounting portion are made from a biocompatible material, the flexible membrane is made from a biocompatible flexible material, and connecting the pressure sensitive sensor to a controller unit (1000). Electrical connection wiring (140) configured to
The pressure sensor characterized by: The sensor housing (110) is made from one of a biocompatible metal including one of rigid polyurethane, rigid silicone, titanium or stainless steel, or any other biocompatible rigid material. sensor. The sensor of claim 1, wherein the attachment portion (130) is made from a biocompatible material including one of Dacron, ePTFE, polyester, or other materials capable of repairing with natural tissue. The sensor of claim 1, wherein the pressure sensitive sensor (150) comprises a MEMS (microelectromechanical systems) sensor or a nanoelectromechanical system (NEMS). The sensor of claim 1, wherein the flexible membrane (120) is made of polyurethane, silicone, or any other hemocompatible material. 2. The sensor of claim 1, wherein the pressure transmission medium within the housing comprises a biocompatible implantable oil, or a medical grade silicone oil, or other biocompatible medical grade fluid. As an implant for measuring venous, atrial or arterial pressure in the pulmonary and systemic circulation, pressure in the thoracic cavity, kidneys, bladder or intestines, in one or more of the following: intracardiac prostheses, total artificial hearts, cardiac assist pumps or the sensor according to claim 1 for use in communication therewith. A controller unit (800, 900, 1000) for controlling a heart pump (700, 310), the heart pump comprising:
at least one pump portion (700, 310);
an inlet (710) connected to the at least one pump section;
an outlet (713) connected to the at least one pump section;
A pressure sensor (100) according to claim 1, configured to measure the pressure of a fluid flowing from an inlet to an outlet;
a pump actuator (750) configured to induce a flow of fluid flow;
including;
The controller unit further includes a memory (1030) and a processing unit (1020), the processing unit:
receives the pressure value from the pressure sensor,
receive the desired value of the pressure of the fluid flowing in the pump;
calculate an error signal equal to the difference between the desired value of pressure and the measured pressure;
The pump control parameters are configured to control the output of the pump such that the measured pressure is close to or equal to the desired pressure, the pump control parameters being configured to control the pump stroke rate and/or the pump stroke rate. Said controller unit including one or several of stroke volume and/or pump speed. An intracardiac prosthesis (700) comprising a pressure sensor according to claim 1.