Joint pressure measurement with sensor in the drainage line

Abstract

The invention relates to a device for rinsing a body cavity, wherein a pressure sensor for determining the actual pressure in the body cavity is provided, said pressure sensor being arranged in the drainage line (8).

Claims

1. A device for rinsing a body cavity with a fluid, comprising a controllable rinsing pump with a feed line connected to the pressure side of the rinsing pump and comprising a first medical instrument with a drainage cannula and comprising a drainage line with a pinch valve, comprising an optional second pump for extracting the fluid from the drainage line, wherein, the drainage line upstream of the pinch valve, a pressure sensor for determining the pressure in the body cavity is provided.

2. The device according to claim 1, wherein the first medical instrument is selected from the group consisting of rinsing probe, trocar with optical system, optical system with rinsing channel, rinsing cannula, shaver.

3. The device according to claim 1, further comprising a second medical instrument.

4. The device according to claim 3, wherein the second medical instrument is a shaver.

5. The device according to claim 4, wherein the shaver controls the pinch valve such that when setting the shaver into operation, the pinch valve moves to the position “closed”, and when the shaver is at a standstill, the pinch valve moves to the position “open”.

6. The device according to claim 1, wherein a second pressure sensor is connected to the feed line on the pressure side of the rinsing pump.

7. The device according to claim 1, wherein the pressure measurement is made with the pressure sensor, when the pinch valve is closed.

8. The device according to claim 6, wherein the pressure measurement is made with the pressure sensor, when the pinch valve is closed, and that the pressure measurement is made with the second pressure sensor, when the pinch valve is open.

Description

[0012] In the following, the invention is explained in more detail with reference to FIG. 1:

[0013] In FIG. 1 can be seen a device for rinsing a body cavity (1) with a fluid. This device is equipped with a storage container (2) for the fluid and with a rinsing pump (3) connected to the storage container. On the pressure side of the rinsing pump (3), a feed line (4) is connected. The feed line is provided with a first medical instrument with a rinsing channel (5), which medical instrument can be introduced into the body cavity (1). On the pressure side of the rinsing pump (3) is provided an optional additional pressure sensor (12) for determining an actual pressure.

[0014] Further, a drainage line (8) is shown, which can be introduced into the body cavity. The drainage line (8) is provided with the sensor according to the invention. In the flow direction downstream of the sensor, a pinch valve (11) is connected, which decouples the drainage line (8) from the suction pump. At the exit side of the suction pump (9), another collection vessel (13) is arranged.

[0015] In an improvement of the device according to the invention, a second medical instrument (6) is provided, for instance a shaver. During the operation of the second medical instrument (6), the pinch valve (11) is automatically closed, so that the volume flow of the fluid through the drainage line (8) is reduced. At this time, the pressure sensor (10) measures the pressure in the body cavity (1). When the shaver is turned off, the pinch valve (11) will automatically open, so that the body cavity (1) is rinsed. If desired, the pressure in the body cavity (1) can be measured during the rinsing process by the optional second pressure sensor (12).

EXAMPLE

[0016] The accuracy of the measurement by the device according to the invention was determined by using a dummy. The dummy has in the body cavity a pressure sensor displaying the actual pressure in the body cavity. The pressure measurement of the device according to the invention in the drainage line (8) excellently matches the actual pressure, as soon as pinch valve is closed, and the flow through the drainage line (8) returns to zero. With opened pinch valve and during pump operation, there are of course different pulse phases depending on the peristaltics of the pump.

[0017] The use of the device according to the invention results in that the pressure limits can be set to substantially higher values. This permits a higher flow rate and thus better rinsing conditions in the body cavity with an overall improved visibility.

[0018] Optionally, the device according to the invention may comprise a second sensor (12) on the pressure side of the rinsing pump. This second sensor is in particular used, when the pinch valve has to be opened, e.g. during the rinsing phases of medical treatments.