Device for the separation of flue gas particles in laparoscopy
Subject matter of the present invention is a device for the separation of flue gas particles and liquid droplets in the exhaustion of surgical gases during laparoscopic interventions.
1. A device for the separation of particles, drop-lets, and humidity from flowing flue gases having a flow rate of 3 to 20 l/min,
comprising a tube of length 1 of 10 to 50 mm, the tube having an inner diameter di of 4 to 20 mm,
comprising an axially located flow body K having a web cross-section of 0.5 to 6 mm,
comprising two to six guide vanes L disposed between the axially located flow body K and the inner wall of the tube, the guide vanes L being rigidly connected to the inner wall of the tube,
wherein the guide vanes L are helically arranged so as to confer a radial movement component to the gas flowing through, the guide vanes having a ratio S of a vane entry surface area FE to a vane exit surface area FA of between 2.7 and 3.3;
wherein the vane entry surface are FE defines an effective flow cross-section at an inlet to the guide vanes and the vane exit surface area F A defines a flow cross-section at an outlet from the guide vanes.
2. The device according to claim 1 comprising 3 to 5 guide vanes L.
3. A method for the separation of flue gas particles and liquid droplets in the exhaustion of surgical gases in medical devices which comprises utilizing the device of claim 2 .
4. The device according to claim 1 , wherein the guide vanes have an exit angle β between the axially located flow body K and the tube cross-section of 20 to 30 degrees.
5. A method for the separation of flue gas particles and liquid droplets in the exhaustion of surgical gases in medical devices which comprises utilizing the device of claim 4 .
6. The device according to claim 1 , wherein the ratio of a length lk of the axial flow body to the web cross-section of the axial flow body dK is between 2 and 3.
7. A method for the separation of flue gas particles and liquid droplets in the exhaustion of surgical gases in medical devices which comprises utilizing the device of claim 6 .
8. The device according to claim 1 , wherein the ratio of a length la between the last edge of the guide vane, in the direction of flow, and a tube exit to the web cross-section of the axial flow body dK is between 2 and 4.
9. A method for the separation of flue gas particles and liquid droplets in the exhaustion of surgical gases in medical devices which comprises utilizing the device of claim 8 .
10. The device according to claim 1 , wherein the connection between the axial flow body and the guide vane is orthogonal or secant-shaped.
11. A method for the separation of flue gas particles and liquid droplets in the exhaustion of surgical gases in medical devices which comprises utilizing the device of claim 10 .
12. The device according to claim 1 , wherein the tube with flow body and guide vanes is integrated in a housing in which particles, liquids and/or gases are separated.
13. The device according to claim 12 , further comprising a fiber filter, a humidity-absorbing material and activated carbon, wherein particles are separated by the fiber filter, water is separated by the humidity-absorbing material gases are separated by the activated carbon.
14. A method for the separation of flue gas particles and liquid droplets in the exhaustion of surgical gases in medical devices which comprises utilizing the device of claim 13 .
15. A method for the separation of flue gas particles and liquid droplets in the exhaustion of surgical gases in medical devices which comprises utilizing the device of claim 12 .
16. A method for the separation of flue gas particles and liquid droplets in the exhaustion of surgical gases in medical devices which comprises utilizing the device of claim 1 .
17. The device according to claim 1 wherein the guide vanes having a ratio S of a vane entry surface area F E to a vane exit surface area F A of between 2 and 5.