Device for rinsing a body cavity

• US 7,371,224 B2
• Filed: 07/18/2003
• Issued: 05/13/2008
• Est. Priority Date: 07/19/2002
• Status: Active Grant

• Current Assignee: W.O.M. World Of Medicine Gmbh (Novanta Inc.)
• Original Assignee: WOM World of Medicine AG (Novanta Inc.)
• Inventors: Reuther, Martin, Haischmann, Fabian, Merzhauser, Thomas, Stiller, Matthias
• Primary Examiner(s): Sirmons; Kevin C.
• Assistant Examiner(s): WITCZAK, CATHERINE
• Application Number:
  US10/623,279
• Publication Number:
  US 20040133149A1
• Time in Patent Office: 1,761 Days
• Field of Search: 604/119, 604/31, 604/35, 604/36, 604/30, 604/43, 604/150, 604/118, 604/19, 604/156
• US Class Current: 604/31
• CPC Class Codes: A61B 17/00234 for minimally invasive surgery A61B17/0218, A61B17/0469, A61B17/12013, A61B17/1285, A61B17/29, A61B17/320016 take precedence
• CPC Class Codes: A61B 17/320016 Endoscopic cutting instruments, e.g. arthroscopes, resectoscopes A61B10/0233, A61B17/29, A61B17/3207 take precedence
• CPC Class Codes: A61M 1/743 by changing the cross-section of the line, e.g. flow regulating valves A61M1/7413 takes precedence
• CPC Class Codes: A61M 1/77 Suction-irrigation systems aspiration tips supplying fluids A61M1/85; specific for negative pressure wound therapy A61M1/92; combined with tracheal tubes A61M16/0463
• CPC Class Codes: A61M 2205/3344 Measuring or controlling pressure at the body treatment site
• CPC Class Codes: A61M 2205/3351 Controlling upstream pump pressure
• CPC Class Codes: A61M 2205/3355 Controlling downstream pump pressure

Abstract

A device for rinsing a body cavity with a fluid includes a rinse pump for introducing fluid into a body cavity and a pressure sensor on a pressure side of the rinse pump. A medical instrument insertable into the body cavity is adapted to establish fluid communication with the body cavity. A suction pump is in fluid communication along a first pathway with the medical instrument and along a second pathway with the body cavity. Fluid flow along the second pathway is controllable. A control unit receives pressure values from the pressure sensor, controls the rinse pump, the suction pump, and the flow controller in response to received pressure values, and is thus operative to control fluid flow through the body cavity depending on an operating condition of the medical instrument.

Claims

1. A device for rinsing a body cavity with a fluid comprising:

a rinse pump operative to introduce fluid into a body cavity through a channel,

a pressure sensor on a pressure side of the rinse pump and upstream of an outlet of the channel;

means for inserting a medical instrument into the body cavity, the medical instrument comprising means for establishing fluid communication with the body cavity;

a suction pump in fluid communication along a first pathway with the fluid communication establishing means and along a second pathway with the body cavity;

a T piece and a first, a second, and a third hose connected to outlets of the T piece, the first pathway comprising the first hose connected to an outlet of the medical instrument, the second pathway comprising the second hose, and the third hose connected to the suction pump;

means for controlling fluid flow along the second pathway;

a T piece positive locking cutout having a recess adapted to positively lock the T piece thereinto, the T piece positive locking cutout integrally formed with the fluid flow controlling means; and

a control unit in signal communication with the rinse pump, the pressure sensor, the suction pump, and the fluid flow controlling means, for receiving pressure values from the pressure sensor and for controlling the rinse pump, the suction pump, and the fluid flow controlling means in response to the received pressure values, operative to control fluid flow through the body cavity depending on received pressure changes caused by changes in an operating condition of the medical instrument according to a preset volume flow of at least one of the rinse pump and the suction pump and according to a predetermined required pressure.

2. The device recited in claim 1, wherein the rinse pump comprises an elastic storage container and a controllable pressure cuff at least partially surrounding the storage container, a feed capacity of the rinse pump controllable by regulation of the pressure cuff.

3. The device recited in claim 2, further comprising a storage container in fluid communication with an inlet side of the rinse pump, for supplying the fluid to be introduced into the body cavity.

4. The device recited in claim 2, wherein the medical instrument comprises a second medical instrument, and further comprising a first medical instrument in fluid communication with the rinse pump for introducing the fluid into the body cavity therefrom.

5. The device recited in claim 4, the first medical instrument is selected from a group consisting of a rinse probe, a trocar and an optical system, and an optical system, rinse channel, and rinse cannula.

6. The device recited in claim 2, wherein the second pathway comprises a drainage cannula insertable into the body cavity and a drainage line in fluid communication with an outlet of the drainage cannula and with the fluid flow controlling means.

7. The device recited in claim 2, wherein the medical instrument has an “

on” and

an “

off”

operating condition.

8. The device recited in claim 7, wherein the medical instrument further has a “

high” and

a “

low”

volume flow depending on the operating condition.

9. The device recited in claim 8, wherein, when the medical instrument has an “

on”

operating condition, the volume flow is “

high,” and

, when the medical instrument has an “

off”

operating condition, the volume flow is “

low.”

10. The device recited in claim 2, wherein the rinse pump comprises a drive unit having a motor having a rotating driven shaft and a pump unit, a feed capacity of the rinse pump controllable by varying the speed of the motor.

11. The device recited in claim 2, wherein the rinse pump comprises a height level-variable storage container, a feed capacity of the rinse pump controllable by regulation of the height level of the storage container.

12. The device recited in claim 2, wherein the medical instrument is selected from a group consisting of a shaver, a sampling device, and a suction probe.

13. The device recited in claim 2, wherein the fluid flow controlling means are operable to control flow along the second pathway in one of the modes of proportionally, continuously, or in a multitude of discrete steps.

14. The device recited in claim 2, wherein the fluid flow controlling means comprises a hose clamping device comprising a hose having a wall at least partially comprising an elastic material, a support surface for supporting the hose thereupon, and a pressure piece positioned on an opposite side of the hose from the support surface, the pressure piece drivable toward and away from the support surface for exerting and decreasing pressure on the elastic portion of the hose wall.

15. The device recited in claim 14, wherein the pressure piece is substantially linearly drivable.

16. The device recited in claim 15, further comprising an electro-motor drive having a spindle gearing connected to the pressure piece.

17. The device recited in claim 16, wherein the electro-motor drive comprises a stepping motor.