Process and Device to control the internal body pressure during use of a medical-technical pump
The present invention relates to a method for controlling the internal body pressure, e.g., the joint pressure using a medical-technical fluid pump, and to a device for carrying out said method.
1 . A method for determining and controlling the internal body pressure in medical methods comprising the steps of:
pumping a fluid by a pumping device via a supply line into a body cavity, wherein the fluid is able to flow through a second line out of the body cavity, and wherein the fluid is able to flow through a separate skin incision of the body cavity,
controlling the pump comprised in the pumping device, wherein an input speed being the effective control variable for a state observer and at least the supply line containing a pressure sensor measuring the pressure in the line, wherein the pressure measured by the pressure sensor is a measurable state variable for calculating an observer error for a state observer, the state observer being described by a state space model, which describes the mathematical-physical relation, which estimates the actual pressure in the body cavity and controls the power of the pump by means of this estimated value.
2 ) The method according to claim 1 , wherein the mathematical estimation system is configured as a state observer.
3 ) The method according to claim 2 , wherein the state observer is configured in a continuous or discrete-time manner.
4 ) The method according to claim 1 , wherein the fluid is a gas.
5 ) The method according to claim 1 , wherein the fluid is a liquid.
6 ) A medical-technical device for introducing fluids into body cavities, comprising a controllable fluid pump, a supply line, a pressure sensor in the supply line, wherein the device is configured to carry out the method according to claim 1 .
7 ) The medical-technical device according to claim 6 further comprising at least one microprocessor, at least one memory, and at least one software.
8 ) The medical-technical device for introducing fluids into body cavities according to claim 7 , wherein the device is an insufflator.
9 ) The medical-technical device for introducing fluids into body cavities according to claim 7 , wherein the device is a liquid pump for arthroscopy, urology, hysteroscopy, laparoscopy.
10 ) A method for determining and controlling the internal body pressure in medical methods comprising the steps of:
conducting a fluid by means of a controllable supply unit and a connected supply line into a body cavity,
controlling the valve comprised in the supply unit, wherein an input volume flow being the effective control variable for a state observer and
at least the supply line containing a pressure sensor measuring the pressure in the supply line, wherein the pressure measured by the pressure sensor is a measurable state variable for calculating an observer error for a state observer, the state observer being described by a state space model, which describes the mathematical-physical relation, which estimates the actual pressure in the body cavity and controls the supply unit of the insufflator by means of this estimated value.
11 ) A medical-technical device for introducing fluids into body cavities, comprising a controllable valve, a supply line, a pressure sensor in the supply line, wherein the device is configured to carry out the method according to claim 10 .