Internally pressurized medical devices

Patent metadata

Field	Value
Publication number	US-9610412-B2
Application number	US-201113020354-A
Country	US
Kind code	B2
Filing date	Feb 3, 2011
Priority date	Mar 2, 2010
Publication date	Apr 4, 2017
Grant date	Apr 4, 2017

Abstract

There are provided pressurized surgical instruments for use in pressurized surgical environments. The pressurized surgical instruments include pressurizing systems for maintaining a neutral or positive pressure flow within the surgical instrument during use. The pressurizing systems include a primary sensor for detecting the pressure of the surgical environment and a pressurizing mechanism for balancing the pressure of the surgical instrument with the surgical environment. The pressurizing mechanism includes a controller to receive and compare the signal sent from the primary sensor to the ambient or internal instrument pressure and a pressure delivery system to provide positive pressure to the interior of the surgical instrument in response to a signal received from the controller. The sources of pressure for the pressure delivery systems may be external or self contained within the surgical instrument.

First claim

The invention claimed is:

1. A pressurized surgical instrument comprising:
a surgical instrument having a body portion and an elongate tubular member extending from the body portion, the elongate tubular member defining an interior;
a primary sensor positioned within the surgical instrument for detecting a pressure in a working environment, the working environment surrounding the elongate tubular member; and
a pressurization mechanism positioned within the body portion of the surgical instrument, the pressurization mechanism including a controller connected to the primary sensor and a pressure delivery system connected to the controller, the pressure delivery system being in fluid communication with an interior of the surgical instrument and configured to provide an insufflation fluid in response to a pressure detected by the primary sensor and to maintain a desired pressure within the interior of the elongate tubular member.

2. The pressurized surgical instrument as recited in claim 1 , wherein the controller incorporates a second sensor for detecting a pressure within the surgical instrument, the controller comparing the pressure in the working environment with the pressure within the surgical instrument.

3. The pressurized surgical instrument as recited in claim 1 , wherein the pressure delivery system is in fluid communication with the interior of the elongate tubular member through a tube.

4. The pressurized surgical instrument as recited in claim 3 , wherein a distal end of the tube is connected to a collar in fluid communication with a proximal end of the elongate tubular member.

5. The pressurized surgical instrument as recited in claim 4 , wherein the collar is in fluid communication with the proximal end of the elongate tubular member through a series of ports positioned about the collar.

6. The pressurized surgical instrument as recited in claim 1 , wherein the pressure delivery system includes a self-contained gas cartridge positioned within the body portion of the surgical instrument.

7. The pressurized surgical instrument as recited in claim 6 , wherein the pressure delivery system includes a valve connected to the self-contained gas cartridge and to the controller, such that the valve regulates gas released by the self-contained gas cartridge in response to a signal received from the controller.

8. The pressurized surgical instrument as recited in claim 1 , wherein the pressure delivery system includes a pressurizing pump in fluid communication with the interior of the elongate tubular member and connected to the controller.

9. The pressurized surgical instrument as recited in claim 8 , wherein the pressure delivery system additionally includes a draw tube extending from the pressurized pump to a location external of the body portion.

10. The pressurized surgical instrument as recited in claim 8 , wherein the pressurizing pump transmits gas in response to a signal received from the controller.

11. The pressurized surgical instrument as recited in claim 1 , wherein the pressure delivery system includes a valve and a connection tube extending from the valve to a connection fitting, the valve connected to the controller.

12. The pressurized surgical instrument as recited in claim 11 , wherein the connection fitting is releasably attachable to an external source of insufflation fluid.

13. The pressurized surgical instrument as recited in claim 11 , wherein the valve regulates gas released by a pressurized pump in response to a signal received from the controller.

14. The pressurized surgical instrument as recited in claim 1 , wherein the primary sensor is positioned within the elongate tubular member.

15. The pressurized surgical instrument as recited in claim 14 , wherein the primary sensor is positioned adjacent a distal end of the elongate tubular member.

16. The pressurized surgical instrument as recited in claim 14 , wherein the primary sensor is contained within a wall of the elongate tubular member.

17. The pressurized surgical instrument as recited in claim 1 , wherein the primary sensor is connected to the controller through a sensor cable.

18. The pressurized surgical instrument as recited in claim 17 , wherein the sensor cable is contained within a wall of the elongate tubular member.

19. The pressurized surgical instrument as recited in claim 1 , wherein the elongate tubular member incorporates a seal to prevent loss of insufflation fluid.

20. The pressurized surgical instrument as recited in claim 1 , wherein the surgical instrument further includes an end effector extending from the elongate tubular member.

21. The pressurized surgical instrument as recited in claim 20 , wherein the end effector includes an anvil member moveable relative to a staple cartridge.

22. The pressurized surgical instrument recited in claim 1 , wherein the primary sensor is positioned adjacent a distal end of the elongate tubular member.

23. The pressurized surgical instrument recited in claim 1 , wherein the pressure delivery system includes a collar in fluid communication with the elongate tubular member through a plurality of ports formed in the collar.

Assignees

• Zemlok Michael
• Pribanic Russell
• Ross Adam
• Marczyk Stanislaw
• Covidien Lp

Inventors

• Zemlok Michael
• Pribanic Russell
• Ross Adam
• Marczyk Stanislaw

Classifications

• A61B2090/064

  for measuring force, pressure or mechanical tension · CPC title

• A61B17/07207 Primary

  the staples being applied sequentially · CPC title

• A61M2205/3344

  Measuring or controlling pressure at the body treatment site · CPC title

• A61M2205/8225

  using incorporated gas cartridges for the driving gas · CPC title

• A61M2202/0225

  Carbon oxides, e.g. Carbon dioxide · CPC title