Electrosurgical device having a dielectrical seal

• US 6,402,748 B1
• Filed: 09/15/1999
• Issued: 06/11/2002
• Est. Priority Date: 09/23/1998
• Status: Expired due to Term

• Current Assignee: Covidien AG (Medtronic Plc)
• Original Assignee: Sherwood Services AG
• Inventors: Schoenman, Arthur, Kelm, Vernita, Sartor, Joe D.
• Primary Examiner(s): Dvorak, Linda C. M.
• Assistant Examiner(s): ROLLINS, ROSILAND STACIE
• Application Number:
  US09/396,897
• Time in Patent Office: 1,000 Days
• Field of Search: 606/39-41, 606/42, 606/45, 606/48, 606/49, 606/50, 606/34, 604/20, 604/22
• US Class Current: 606/45
• CPC Class Codes: A61B 18/14 Probes or electrodes therefor
• CPC Class Codes: A61B 18/1402 Probes for open surgery
• CPC Class Codes: A61B 2017/00026 Conductivity or impedance, e.g. of tissue
• CPC Class Codes: A61B 2017/00035 pH
• CPC Class Codes: A61B 2017/00057 Light
• CPC Class Codes: A61B 2017/0046 with a releasable handle; with handle and operating part separable for prosthetic joint-implanting tools A61F2/4603
• CPC Class Codes: A61B 2017/00526 Methods of manufacturing
• CPC Class Codes: A61B 2018/00178 Electrical connectors
• CPC Class Codes: A61B 2018/00988 Means for storing information, e.g. calibration constants, or for preventing excessive use, e.g. usage, service life counter
• CPC Class Codes: G06M 1/04 for driving the stage of lowest order with variable ratio of drive G06M1/38
• CPC Class Codes: G06M 1/083 by mechanical means counting of stacked objects G06M9/00
• CPC Class Codes: H01H 1/18 with subsequent sliding
• CPC Class Codes: H01H 2300/014 Application surgical instrument
• CPC Class Codes: H01H 9/04 Dustproof, splashproof, drip-proof, waterproof, or flameproof casings
• CPC Class Codes: H01H 9/06 Casing of switch constituted by a handle serving a purpose other than the actuation of the switch, e.g. by the handle of a vacuum cleaner
• CPC Class Codes: H01R 13/66 Structural association with built-in electrical component coupling devices having concentrically or coaxially-arranged contacts H01R24/38
• CPC Class Codes: H01R 2201/12 for medicine and surgery
• CPC Class Codes: H01R 43/26 for engaging or disengaging the two parts of a coupling device structural association with two-part coupling device H01R13/629

Abstract

An electrosurgical device is provided having at least one elastomeric seal capable of providing bio-contamination and dielectric protection by inhibiting the ingress of fluids and contaminants through the nose and actuator areas. The elastomeric seal is manufactured from a thermoplastic elastomer or resin which while in liquid form is placed within a mold. A housing section having the main circuit components and mechanisms of the electrosurgical device is then placed within the mold. Once the elastomer cures, the elastomeric seal seals the components and mechanisms within the housing partial-section. The elastomeric seal defines a flexible first opening at a distal end of the electrosurgical device to accommodate varying diameters of electrodes or blades connected to the nose area of the electrosurgical device. An actuator seal is also provided on the actuator area of the electrosurgical device to prevent fluids and contaminants from entering the electrosurgical device through the actuator area. Two buttons are insert molded within the actuator seal and are operatively associated with a self-cleaning switching mechanism within the housing section to operate the electrosurgical device between a cutting and coagulating mode. The actuator seal is also manufactured from a thermoplastic elastomer or resin.

Claims

1. An electrosurgical device comprising:

a housing having a distal end and a switching mechanism configured to operatively couple to contact structure;

an actuator operatively associated with the switching mechanism for operating the electrosurgical device between a cutting and a coagulating mode; and

a seal overlaying at least a portion of the distal end of the housing and at least a portion of the switching mechanism for preventing fluids and contaminants from entering the housing, said seal defining an opening at the distal end of the housing for inserting an electrode therein.

2. The electrosurgical device of claim 1, wherein said seal includes a lip portion and a body portion.

3. The electrosurgical device of claim 1, wherein said seal is manufactured from a thermoplastic elastomer.

4. The electrosurgical device of claim 1, wherein said seal overlays at least a portion of the actuator.

5. The electrosurgical device of claim 1, wherein said seal includes a lip portion circumferentially surrounding said opening for accommodating varying diameters of electrodes.

6. The electrosurgical device of claim 1, wherein said seal is monolithically formed with said housing.

7. The electrosurgical device of claim 1, wherein said seal is chemically adhered to said electrosurgical device.

8. The electrosurgical device of claim 1, wherein said seal is mechanically attached to said electrosurgical device.

9. The electrosurgical device of claim 1, wherein said switching mechanism includes a pair of moving contacts each corresponding to a stationary contact of said contact structure, wherein one of said moving contacts slides along said corresponding stationary contact upon actuation of said actuator to clean said moving contact and said stationary contact.

10. The electrosurgical device of claim 1, wherein said actuator is configured to actuate said switching mechanism to cause a moving contact to contact a corresponding stationary contact to create an electric circuit between said electrode and an electric generator of which said device is plugged into for performing cutting or coagulating of tissue.

11. The electrosurgical device of claim 1, further comprising a counting mechanism for counting the number of times the electrosurgical device is plugged into an electric generator.

12. The electrosurgical device of claim 11, wherein said counting mechanism includes a disable mechanism for preventing said electrosurgical device from being plugged into the electric generator after a pre-determined amount of insertion and removal operations.

13. The electrosurgical device of claim 11, wherein said counting mechanism includes an indicator for indicating to an operator the number of times the device has been inserted within the electric generator.

14. An electrosurgical device comprising:

a longitudinal housing having a switching mechanism disposed thereon and a nose area configured for inserting an electrode therein, said housing further having contact structure therein configured to electrically couple to said switching mechanism;

an electrical cord electrically coupled to said contact structure and extending from a proximal end of said housing;

a plug connector having a counting mechanism, the plug connector connected to a proximal end of said electrical cord and configured for connecting to a power supply source for supplying current to said contact structure via said electrical cord, said counting mechanism having structure for counting the number of times said plug connector is coupled to said power supply source;

an elastomeric seal formed integral with said housing having a lip portion circumferentially extending from said nose area; and

an actuator elastomeric seal disposed around said housing and operatively associated with said switching mechanism.

15. The electrosurgical device of claim 14, wherein said switching mechanism includes at least one moving contact having a moving contact face aligned with a stationary contact face of a stationary contact of the contact structure, wherein said moving contact face slides along said stationary contact face when said actuator seal is actuated to clean said moving and stationary contact faces.

16. A kit for performing electrosurgical procedures comprising:

an electrosurgical device having a longitudinal housing;

at least one elastomeric seal formed integral with said housing for sealing components therein; and

a plug connector having a counting mechanism, the plug connector connected to a proximal end of an electrical cord, said electrical cord configured for coupling said counting mechanism with circuitry within said housing of said electrosurgical device, said counting mechanism configured for connecting to a power supply source for supplying current to said circuitry via said electrical cord, said counting mechanism having structure for counting the number of times said plug connector is coupled to said power supply source.

17. The kit according to claim 16, wherein said electrosurgical device comprises a switching mechanism including at least one moving contact having a moving contact face aligned with a stationary contact face of a stationary contact, wherein said moving contact face slides along said stationary contact face when said switching mechanism is actuated to clean said moving and stationary contact faces.

18. An electrosurgical device comprising:

a housing having a switching mechanism configured to operatively couple to contact structure;

an actuator operatively associated with the switching mechanism for operating the electrosurgical device between a cutting and a coagulating mode; and

a seal overlaying at least a portion of the housing for preventing fluids and contaminants from entering the housing, said seal defining an opening at a distal end of the housing for inserting an electrode therein, wherein said switching mechanism includes a pair of moving contacts each corresponding to a stationary contact of said contact structure, wherein one of said moving contacts slides along said corresponding stationary contact upon actuation of said actuator to clean said moving contact and said stationary contact.