Irrigation system for endoscopic surgery

• US 6,358,224 B1
• Filed: 09/24/1999
• Issued: 03/19/2002
• Est. Priority Date: 09/24/1999
• Status: Expired due to Fees

• Current Assignee: Covidien LP (Medtronic Plc)
• Original Assignee: Tyco Healthcare Group LP (Medtronic Plc)
• Inventors: Ditterline, Andrew F., Tims, Jerry L.
• Primary Examiner(s): Mendez, Manuel
• Application Number:
  US09/405,684
• Time in Patent Office: 907 Days
• Field of Search: 604/27, 604/30, 604/31, 604/32, 604/33, 604/34, 604/35, 604/36, 604/131, 604/246, 604/248, 604/249, 604/250
• US Class Current: 604/30
• CPC Class Codes: A61M 1/7413 by changing the cross-section of the line
• CPC Class Codes: A61M 1/772 operating alternately
• CPC Class Codes: A61M 1/78 Means for preventing overflow or contamination of the pumping systems combined with drainage containers A61M1/60
• CPC Class Codes: A61M 1/782 using valves with freely moving parts, e.g. float valves
• CPC Class Codes: A61M 2205/17 with redundant control systems
• CPC Class Codes: A61M 3/0208 before use
• CPC Class Codes: A61M 3/0216 Pressure
• CPC Class Codes: A61M 3/022 Volume; Flow rate
• CPC Class Codes: A61M 3/0258 by means of electric pumps
• CPC Class Codes: A61M 39/24 Check- or non-return valves

Abstract

An irrigation system for use during endoscopic or minimally invasive surgery is shown. Both vacuum and a pressurized irrigation fluid are continually provided to a trumpet valve for immediate use during surgery. A pump that provides the pressurized irrigation fluid has a reusable motor, but a disposable head that can be replaced between procedures. A control circuit automatically reduces the voltage being supplied to the pump if there had not been a request for irrigation fluid for a first time period. If a second time period, which is longer than the first time period, passes and (a) there is no demand for irrigation and (b) the voltage to the pump has not been reduced, either the voltage to the pump will be reduced or the pump shut OFF. The irrigation system is provided in kit form with parts having to be replaced between procedures contained therein.

Claims

1. An irrigation system for use during endoscopic surgery on a patient comprising:

a vacuum source;

a source of irrigation fluid;

a trumpet valve for alternately connecting said vacuum source or said irrigation fluid to said patient during said laparoscopic surgery according to demand by the user, a first button of said trumpet valve providing said irrigation fluid from said source to said patient, a second button of said trumpet valve providing suction from said vacuum source to said patient;

a pump between said trumpet valve and said source of said irrigation fluid to continually provide said irrigation fluid under pressure to said trumpet valve during said laparoscopic surgery; and

a vacuum cannister between said vacuum source and said trumpet valve to collect fluids or particles therein during said suction;

said pump including a disposable head and a reusable motor with a quick disconnect therebetween.

2. The irrigation system for use during endoscopic surgery on the patient as recited in claim 1 further including control circuit between said pump and a power source, said control circuit reducing voltage being applied to said pump if demand for said irrigation fluid has not occurred for a first predetermined period of time.

3. The irrigation system for use during endoscopic surgery on the patient as recited in claim 2 wherein said control circuit includes an override portion, said override portion monitoring voltage delivered to said pump and if said monitoring voltage is not said reduced voltage after a second predetermined period of time of non-use, said monitoring voltage being overridden to provide said reduced voltage, said second predetermined period of time being longer than said first predetermined period of time.

4. The irrigation system for use during endoscopic surgery on the patient as recited in claim 1 comprises:

an IV stand;

two bags of IV fluid on said IV stand providing said source of said irrigation fluid; and

Y-connection and tube clamps to connect only one of said two bags at a time to said disposable head of said pump.

5. The irrigation system for use during endoscopic surgery on the patient as recited in claim 4 having a check valve between said trumpet valve and said disposable head of said pump, said check valve preventing backwash from said patient to said disposable head.

6. A method of providing irrigation to a patient during endoscopic surgery consisting of the following steps:

pressurizing an irrigation fluid by a pump to continually deliver pressurized irrigation fluid to a valve;

periodically providing said pressurized irrigation fluid to said patient during said endoscopic surgery as demanded by the user at said valve;

reducing voltage being delivered to said pump from a higher level to a lower level if there is no demand for said pressurized irrigation fluid for a first predetermined period of time, said lower level of said voltage being high enough to maintain said pressurized irrigation fluid at said valve; and

increasing voltage being delivered to said pump back to said higher level when there is demand by the user for said pressurized irrigation fluid.

7. The method of providing irrigation to a patient during endoscopic surgery as recited in claim 6 includes a step of connecting a source of vacuum to said valve to continually provide suction at said valve, said periodical step also providing suction to said patient as demanded by the user.

8. The method of providing irrigation to a patient during endoscopic surgery as recited in claim 7 wherein said valve is a trumpet valve.

9. The method of providing irrigation to the patient during endoscopic surgery as recited in claim 6 including an override step to reduce voltage being delivered to said pump to said lower level, said override step monitoring said pump and if (a) there has been no demand for said pressurized irrigation fluid for a second predetermined period of time and (b) voltage being delivered to said pump is said higher level of said voltage, said voltage is automatically reduced to said lower of said level voltage, said second predetermined period of time being longer than said first predetermined period of time.

10. The method of providing irrigation to the patient during endoscopic surgery as recited in claim 6 includes between different endoscopic surgery procedures a step of removing a head of said pump from a motor thereof and replacing said head.

11. The method of providing irrigation to the patient during endoscopic surgery as recited in claim 8 includes a step of inserting a check valve between said pump and trumpet valve to prevent backwash, further steps include replacing said check valve between different laparoscopic surgery procedures.

12. The method of providing irrigation to the patient during endoscopic surgery as recited in claim 11 includes an additional step of periodically between different endoscopic surgery procedures a step of removing a head of said pump from a motor thereof and replacing said head.

13. The method of providing irrigation to the patient during endoscopic surgery as recited in claim 7 wherein said connecting to said source of vacuum is through a vacuum cannister.

14. The method of providing irrigation to the patient during endoscopic surgery as recited in claim 9 wherein said override step shuts OFF said pump.