In-joint sensor for a surgical fluid management pump system

Patent metadata

Field	Value
Publication number	US-9492071-B2
Application number	US-201313804013-A
Country	US
Kind code	B2
Filing date	Mar 14, 2013
Priority date	Apr 5, 2012
Publication date	Nov 15, 2016
Grant date	Nov 15, 2016

Abstract

An in-joint pump and control device comprising a pump and an in-joint sensor. The pump is configured to convey fluid to a body joint surgical site. The pump has an algorithm associated therewith to make calculations and to assist in controlling the operation of the pump. The in-joint sensor is operatively associated with the pump by at least a communication member. The in-joint sensor comprises a sheath, an integration member attached to the sheath, a pressure sensor connected to the integration member, and a temperature sensor adjacent the sheath. The pressure sensor is adapted to provide pressure information to the pump via the communication member. The temperature sensor is also adapted to provide temperature information to the pump via the communication member.

First claim

We claim:

1. A sensing device comprising:
a sheath having a longitudinal axis, a proximal end, a distal end, and an outer wall defining an inner lumen extending substantially in the direction of the longitudinal axis;
a flow tube disposed at least partially within the sheath and having a flow tube wall;
an integration component attached to the sheath and having an attachment portion configured to interface with the sheath to maintain a fluid seal, the sheath having a space therein to allow a static column of liquid between the sheath and the flow tube wall to reside adjacent the integration component;
a thermal sensing device adjacent the outer wall of the sheath and terminating distally adjacent the distal end of the sheath, the thermal sensing device adapted to measure and relay the temperature of fluid in or adjacent a surgical site; and
a pressure sensing device located adjacent the integration component and configured to measure and relay information based on the pressure of the static column of liquid to be used to calculate and display the pressure at the surgical site.

2. The sensing device of claim 1 , further comprising a sensor aperture located in or adjacent the integration component, the sensor aperture retaining the pressure sensor.

3. The sensing device of claim 2 , wherein the thermal sensing device comprises a wire thermistor.

4. The sensing device of claim 3 , and further comprising a shaft for receiving a portion of the thermal sensing device, at least a portion of the shaft being integrated with the outer wall of the sheath.

5. The sensing device of claim 1 , wherein the thermal sensing device comprises a thermal sensor attached to at least one fiber optic member.

6. The sensing device of claim 1 , wherein the pressure sensing device comprises a peizoresistive pressure sensor.

7. The sensing device of claim 1 , wherein the pressure sensing device comprises a pressure sensor utilizing fiber optics.

8. The sensing device of claim 1 , wherein the pressure sensing device comprises an air-water pressure separator sensor.

9. The sensing device of claim 1 , wherein the temperature sensing device creates a temperature signal and relays the temperature signal for use in a pump control algorithm.

10. The sensing device of claim 9 , wherein the pressure sensing device creates a pressure signal and relays the pressure signal for use in a pump control algorithm.

11. An in-joint pump and control device comprising:
a pump configured to convey fluid to a body joint surgical site, the pump having an algorithm associated therewith to make calculations and to assist in controlling the operation of the pump; and
an in-joint sensor operatively associated with the pump by at least a communication member, the in-joint sensor comprising a sheath, an integration member attached to the sheath, a pressure sensor connected to the integration member, and a temperature sensor adjacent the sheath,
the pressure sensor adapted to provide pressure information to the pump via the communication member, and the temperature sensor adapted to provide temperature information to the pump via the communication member.

12. The in-joint pump and control device of claim 11 , wherein the communication member comprises a wireless transmitter.

13. The in-joint pump and control device of claim 11 , wherein the sheath has a distal end, and at least a portion of the temperature sensor is positioned adjacent the distal end of the sheath.

14. The in-joint pump and control device of claim 11 , wherein the algorithm uses information received from the communication member.

15. An arthroscopic tubeset comprising:
a cannula having a wall defining an inner aperture and an outer wall surface, the cannula having a distal end;
a sheath attached to the outer wall surface of the cannula, the sheath defining an interior space and having a sheath end adjacent the cannula distal end;
a pressure sensor within the sheath adjacent the sheath end;
a temperature sensor within the sheath adjacent the sheath end; and
at least one fiber optic member attached to each of the pressure sensor and temperature sensor for relaying information to a controller, each fiber optic member partially housed within the sheath.

16. The arthroscopic tubeset according to claim 15 , wherein the cannula is attached to in-flow tubing from a pump.

17. The arthroscopic tubeset according to claim 15 , wherein the pressure sensor and the temperature sensor are disposed side-by-side with respect to each other in the interior space of the sheath.

18. The arthroscopic tubeset according to claim 15 , wherein the pressure sensor has a diameter between about 120 microns and about 140 microns.

19. A sensing device comprising:
a sheath having a longitudinal axis, a proximal end, a distal end, and an outer wall defining an inner lumen extending substantially in the direction of the longitudinal axis;
an integration component attached to the sheath and having an attachment portion configured to interface with the sheath to maintain a fluid seal, the sheath having a space therein to allow a static column of liquid to reside adjacent the integration component;
a thermal sensing device adjacent the outer wall of the sheath and terminating distally adjacent the distal end of the sheath, the thermal sensing device adapted to measure and relay the temperature of fluid in or adjacent a surgical site, the thermal sensing device comprising a wire thermistor;
a pressure sensing device located adjacent the integration component and configured to measure and relay information based on the pressure of the static column of liquid to be used to calculate and display the pressure at the surgical site; and
a shaft for receiving a portion of the thermal sensing device, at least a portion of the shaft being integrated with the outer wall of the sheath,
wherein a sensor aperture is located in or adjacent the integration component, the sensor aperture retaining the pressure sensing device.

20. An arthroscopic tubeset comprising:
a cannula having a wall defining an inner aperture and an outer wall surface, the cannula having a distal end;
a sheath attached to the outer wall surface of the cannula, the sheath defining an interior space and having a sheath end adjacent the cannula distal end;
a pressure sensor adjacent the sheath end;
a temperature sensor adjacent the sheath end; and
at least one fiber optic member attached to each of the pressure sensor and temperature sensor for relaying information to a controller, each fiber optic member partially housed within the sheath,
wherein the pressure sensor and the temperature sensor are disposed side-by-side with respect to each other in the interior space of the sheath.

Assignees

• Woolford Brady
• Smith Justin
• Stryker Corp

Inventors

• Woolford Brady
• Smith Justin

Classifications

• A61M3/0201

  Cassettes therefor · CPC title

• A61M1/72

  Cassettes forming partially or totally the fluid circuit · CPC title

• A61B1/015 Primary

  Control of fluid supply or evacuation · CPC title

• A61M1/77

  Suction-irrigation systems (aspiration tips supplying fluids A61M1/85; specific for negative pressure wound therapy A61M1/92; combined with tracheal tubes A61M16/0463) · CPC title

• A61M2205/3344

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