Electrosurgical device having a dielectric seal

• US 6,755,825 B2
• Filed: 09/13/2001
• Issued: 06/29/2004
• Est. Priority Date: 09/23/1998
• Status: Expired due to Fees

• Current Assignee: Covidien AG (Medtronic Plc)
• Original Assignee: Sherwood Services AG
• Inventors: Sartor, Joe D., Kelm, Vernita, Shoenman, Arthur
• Primary Examiner(s): ROLLINS, ROSILAND STACIE
• Application Number:
  US09/951,592
• Publication Number:
  US 20020035364A1
• Time in Patent Office: 1,020 Days
• Field of Search: 606/34, 606/41, 606/42, 606/45, 606/48, 606/49, 606/50, 604/21, 604/22, 604/35
• 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. The self-cleaning switching mechanism includes a switch contact plate having pair of movable contacts having contact faces. Each movable contact corresponds to a stationary contact positioned within a circuit mold. As the actuator seal is depressed, contact faces of the movable and stationary contacts slide along each other to clean the contacts from non-conductive corrosion and contaminants. The device is further provided with a plug connector having a counting mechanism for counting the number of times the device is plugged into an electric generator. A disable mechanism is included at the proximal end of the plug connector to disable the device after a pre-determined number of operations.

Claims

1. An elastomeric seal for inhibiting the ingress of bio-materials into an electrosurgical device of the type having an electrode protruding from a distal end of a longitudinal housing for introducing current to said electrode for cauterizing or cutting body tissue, the elastomeric seal comprising:

an elongated body portion contoured for fitting upon said electrosurgical device, said elongated body portion further defining a first opening at a distal end and a second opening at a proximal end for fitting the elastomeric seal over the housing of said electrosurgical device, said elastomeric seal further defining an actuating member pocket for fitting an actuating member of the electrosurgical device therein; and

a lip portion circumferentially surrounding said first opening.

2. The elastomeric seal according to claim 1, wherein said elastomeric seal is manufactured from shore A durometer silicone.

3. The elastomeric seal according to claim 1, wherein said elastomeric seal is manufactured from a thermoplastic elastomer.

4. The elastomeric seal according to claim 1, wherein said lip portion is configured to accommodate varying diameters of electrodes connected to said electrosurgical device.

5. The elastomeric seal according to claim 1, wherein said lip portion has greater elasticity than the body portion.

6. The elastomeric seal according to claim 1, wherein said elongated body portion has a uniform thickness.

7. The elastomeric seal according to claim 1, wherein a nose portion at the distal end of the seal has a greater thickness than said body portion.

8. The elastomeric seal according to claim 7, wherein the nose portion has an internal diameter less than the internal diameter of the body portion.

9. The elastomeric seal according to claim 8, wherein the lip portion has an internal diameter less than the internal diameter of the nose portion.