Method and device for irrigation of body cavities

1. A vision regulation device for a liquid for irrigation of a body cavity surgical site comprising,

an inflow liquid pump arranged to feed an irrigation liquid from a container though a feed line into a body cavity,

an outflow device, which is arranged to drain the irrigation liquid from the body cavity through a tubing,

a first control unit connected to the inflow liquid pump,

wherein the tubing is provided with optical sensors configured to be at an outflow site of the body cavity to identify an amount of blood cells, red blood cells, haemoglobin and debris in the irrigation liquid, and to give signals to a second control unit indicating the amount of blood cells, red blood cells, haemoglobin and debris,

wherein the second control unit increases the effect of the inflow liquid pump and/or the outflow device to rinse the surgical site so that flow of the inflow irrigation liquid is increased when the amount of debris is increased in the irrigation liquid in, or coming out of, the surgical site or the inflow liquid pump is regulated so that pressure of the irrigation liquid is increased when the amount of blood cells, red blood cells or haemoglobin is increased in the irrigation liquid in, or coming out of, the surgical site.

2. The device according to claim 1 , wherein a pressure sensor connected to the feed line is provided at an inflow site of the body cavity for measuring an inflow irrigation liquid pressure, and a matching device in the first control unit is configured to align the inflow irrigation liquid pressure with a pressure in the body cavity by altering the effect of the inflow liquid pump and/or the outflow device on pressure in the body cavity.

3. The device according to claim 2 , wherein the outflow device is either an outflow liquid pump, or an outflow shut off valve or a combination of an outflow shut off valve and an external suction source.

4. The device according to claim 2 , wherein a recalculation device is provided in the first control unit together with a calibration device for the pressure from the pressure sensor and flow values that compares the inflow irrigation liquid pressure and flow with pressures calculated to correspond to pressures in the body cavity for the respective flow and recalculates the pressure and flow at the surgical site by simultaneously stopping both the inflow liquid pump and the outflow device during a time interval and continuously registering the inflow irrigation liquid pressure of the pressure drop in the liquid volume between the inflow liquid pump and the outflow device during the time interval.

5. The device according to claim 2 , wherein the first control unit is configured to compare the inflow irrigation liquid pressure and flow with pressures calculated to correspond to pressures in the body cavity for the respective flow for maintaining either a constant irrigation liquid pressure and/or a constant irrigation liquid flow in the body cavity at a value of inflow liquid pressure from the pressure sensor and flow that correspond to pressures in the body cavity for the respective flow by a control of both the inflow liquid pump and/or the outflow device for outflow liquid.

6. The device according to claim 1 , further comprising a debris identification module for registering the amount of debris in the liquid coming out from the surgical site and a separate blood identification module for registering the amount of blood cells, red blood cells, and/or haemoglobin, wherein each of the identification modules is provided for cooperation with one or both of the sensors.

7. The device according to claim 1 , wherein the optical sensors compare values of registered blood cells, red blood cells, haemoglobin and/or the amount of debris in the liquid coming out from the surgical site and compare these registered values with reference values in the second control unit.