Tissue resecting system

Patent metadata

Field	Value
Publication number	US-2016220102-A1
Application number	US-201615095997-A
Country	US
Kind code	A1
Filing date	Apr 11, 2016
Priority date	Aug 27, 2004
Publication date	Aug 4, 2016
Grant date	—

Abstract

A surgical system includes a first instrument defining a first channel and a second instrument receivable by the first channel. The second instrument defines a second channel. A valve coupled to the first instrument controls fluid flow through the first channel, such that impedance of fluid flow through the first channel is substantially the same without the second instrument received in the first channel and with the first channel partially blocked by the second instrument. In another aspect, a surgical apparatus includes an outer member and an inner member received within the outer member to define a first channel therebetween. The inner member houses an optical lens and defines a second channel for receiving a surgical instrument. The first and second channels are configured such that a pump having an inflow rate of up to about 0.7 L/min connected to the second channel can maintain fluid pressure inside an organ.

First claim

1 . (canceled)

2 . A tissue resecting system comprising:
a first device configured to be inserted into a distensible organ to flow fluid into and out of the distensible organ, the first device having an inflow channel for flowing the fluid into the distensible organ; a second device configured to be received within the inflow channel of the first device; and a fluid management control unit configured to supply the fluid to the first device through an inflow line, the fluid management control unit including:
a pump configured to pump the fluid to the first device through the inflow line;
a flow rate sensor configured to measure a fluid flow rate within the inflow line;
a pressure sensor configured to measure a fluid pressure within the inflow line;
memory storing information; and
a controller configured to control the pump based on (i) the measured fluid flow rate within the inflow line, (ii) the measured fluid pressure within the inflow line, and (iii) the information, the controller being further configured to verify the first device and the second device as one of a plurality of valid device combinations based on the measured fluid flow rate and the measured fluid pressure.

3 . The system of claim 2 , wherein the information includes fluid flow rates and predetermined fluid pressures at the fluid flow rates for the plurality of valid device combinations.

4 . The system of claim 2 , wherein the controller is configured to verify the first device and the second device as one of the plurality of valid device combinations based on the measured fluid pressure satisfying a threshold associated with the measured fluid flow rate, with the second device received within the inflow channel of the first device.

5 . The system of claim 4 , wherein the threshold is based on a predetermined fluid pressure at the measured fluid flow rate.

6 . The system of claim 4 , wherein the controller is further configured to verify the first device and the second device as one of the plurality of valid device combinations based on measured fluid pressures within the inflow channel satisfying respective thresholds for measured fluid flow rates with the second device received within the inflow channel of the first device.

7 . The system of claim 2 , further comprising:
an interface configured to accept one or more user inputs to set a desired fluid pressure within the distensible organ, wherein, based on the desired fluid pressure, the controller is configured to control the pump to achieve a fluid flow rate corresponding to the desired fluid pressure.

8 . The system of claim 2 , wherein the first device is one of a plurality of first devices, the second device is one of a plurality of second devices, and the information includes combinations of the first devices and the second devices as the plurality of valid device combinations, with fluid flow rates and corresponding fluid pressures for each of the plurality of valid device combinations.

9 . The system of claim 2 , wherein the first device and the second device being one of the plurality of valid device combinations is based on fluid flow into the distensible organ with the second device not received within the inflow channel of the first device being substantially equal to fluid flow into the distensible organ with the second device received within the inflow channel of the first device.

10 . The system of claim 2 , wherein the controller is further configured to disable the pump upon a determination that the first device and the second device is an invalid combination.

11 . The system if claim 10 , wherein the fluid management control unit further includes an alarm that is configured to provide an audible indication and/or a visual indication in response to the determination when the controller disables the pump.

12 . The system of claim 2 , wherein the fluid management control unit further includes a shut-off circuit configured to shut-off the pump, and the controller is further configured to override the shut-off circuit upon verifying the first device and the second device as one of the plurality of valid device combinations.

13 . The system of claim 2 , wherein the first device is a hysteroscope.

14 . The system of claim 13 , wherein the second device is a resector.

15 . The system of claim 14 , wherein the distensible organ is a uterus.

16 . The system of claim 2 , wherein the controller is configured to control the pump to maintain a pressure in the distensible organ between about 60 mmHg and about 120 mmHg.

17 . A fluid management control unit configured to supply fluid to a hysteroscopy system through an inflow line, the fluid management control unit comprising:
a pump configured to pump the fluid to the hysteroscopy system through the inflow line; a flow rate sensor configured to measure a fluid flow rate within the inflow line; a pressure sensor configured to measure a fluid pressure within the inflow line; memory storing information on fluid flow rates and predetermined fluid pressures for the fluid flow rates for valid combinations of hysteroscopes and resectors of the hysteroscopy system; and a controller configured to control the pump based on (i) the measured fluid flow rate within the inflow line, (ii) the measured fluid pressure within the inflow line, and (iii) the information on the fluid flow rates and the predetermined fluid pressures for the fluid flow rates, the controller being further configured to verify a combination of a hysteroscope and a resector of the hysteroscopy system as one of the valid combinations based on the measured fluid flow rate and the measured fluid pressure.

18 . The unit of claim 17 , wherein the controller is configured to verify the hysteroscope and the resector as one of the valid combinations based on the measured fluid pressure satisfying a threshold for the measured fluid flow rate with the resector being received within the hysteroscope.

19 . The unit of claim 18 , wherein the threshold is based on a predetermined fluid pressure at the measured fluid flow rate.

20 . The unit of claim 17 , wherein the controller is configured to verify the hysteroscope and the resector as one of the valid combinations based on measured fluid pressures within the inflow line satisfying respective thresholds for measured fluid flow rates with the resector being received within the hysteroscope.

21 . The unit of claim 17 , wherein the hysteroscope and the resector of the hysteroscopy system is one of the valid combinations based on fluid flow through the hysteroscopy system in a first state being substantially equal to fluid flow through the hysteroscopy system in a second state.

22 . The unit of claim 21 , wherein the hysteroscopy system in the first state includes the resector not received within the hysteroscope, and the hysteroscopy system in the second state includes the resector received within the hysteroscope.

23 . A method of verifying an identity of a hysteroscope, a resector, or a combination thereof of a hysteroscopy system, the method comprising:
flowing fluid through an inflow line of the hysteroscopy system at a flow rate; measuring a fluid pressure at the flow rate; and comparing the measured fluid pressure to a threshold associated with the measured flow rate to verify the identity of the hysteroscope, the resector, or a combination thereof.

24 . The method of claim 23 , wherein the measured fluid pressure is comp

Assignees

• Smith & Nephew Inc

Inventors

• Shener-Irmakoglu Cemal
• Newell Christopher R
• Hedstrom Petter
• Krause Kenneth W

Classifications

• A61B1/018 Primary

  for receiving instruments · CPC title

• A61B1/00068

  Valve switch arrangements · CPC title

• A61B1/015

  Control of fluid supply or evacuation · CPC title

• A61B17/320016

  Endoscopic cutting instruments, e.g. arthroscopes, resectoscopes (A61B10/0233, A61B17/29, A61B17/3207 take precedence) · CPC title

• A61B17/3498

  Valves therefor, e.g. flapper valves, slide valves (haemostasis valves A61M39/06; check valves A61M39/24) · CPC title