DE4236394A1 - Isolation device for surgical instrument using hf currents - uses two isolation elements eliminating need for insulating metal instrument handgrip - Google Patents

Abstract

The isolation device comprises two isolation elements, respectively provided by a coupling piece between the operating end of the instrument and the handgrip end and by a reception piece for the handgrip end of the mechanical movement transfer medium. Each isolation element is made of a mechanically rigid, non-conductive material, e.g. plastic or ceramics. Pref. the instrument has a metal handgrip which does not require an outer insulation sheath. ADVANTAGE - Effective isolation allowing sterilisation.

Description

The invention relates to the isolation for surgical instruments, with those using high frequency electric current is operated on.

The insulation unit according to claim 1 and 2 is intended to prevent that the surgeon or operating personnel as a result of contact with the high-frequency electrical current used in the operation is burned. Claims 3 and 4 relate to complete instruments that have isolation that just if the operator or the operating personnel is prevented due to contact with the high-frequency electrical current, used in the operation suffers burns.

Instruments of conventional design have an insulating Covering the handle parts. More conventional for instruments Design, which are provided with a lock or catch, ver you either use a plastic lock or catch, one also covered lock or catch or in the simplest case a non-metallic lock or catch.

The casing used for insulation begins, however after a few sterilization cycles defective. The plastic lock or catch and the encased The lock or catch are subject to very high mechanical abrasion and quickly become unusable. The non-insulated lock the operating personnel or the surgeon - just like defective insulation - always in danger from burning yourself on the hands or face.

The invention has for its object the electrical Insulation so that neither after several Sterilization cycles still result in mechanical abrasion of the insulation or the instrument as such becomes defective.  

This object is achieved according to the invention in that firstly an insulation piece (connector) the working end with the Handle end of the instrument mechanically firm, but electrical non-conductive connection, and secondly an insulation piece (Recording device) designed as a device for the Recording of the handle-side end of the movement mediation medium (usually wire or rod with a spherically extended end) is attached.

The insulation pieces can each be made of a uniform material be so that they can be sterilized frequently without any problems, without losing their function. Nor are they subject to anyone noteworthy abrasion. For the aforementioned reasons, the Isolation pieces also not necessarily made of plastic exist, but can be mechanically sufficiently strong and electrically non-conductive material exist, for. B. also from Ceramics.

For instruments that use an isolation unit Claim 1 or 2 are provided, notches and locks that attached to the handle side of the instrument, made of metal exist without having to be isolated.

The advantages achieved with the invention are that on the one hand for surgical instruments with high frequency electrical current are used, a much longer one Lifetime with much higher security of the Operations personnel and the surgeon is achieved and on the other hand also by the possibility to manufacture high frequency suitable instruments with metallically uninsulated Lock or detent that only a slight mechanical abrasion is subject to an increase in the value of the instruments.  

An embodiment of the invention is the drawing: Functional principle shown and will be explained in the following text described.

Show it:

Fig. 1, the isolation piece, located between the working end of the instrument and the handle part, is provided with a receptacle for the HF connection and with a bore for receiving a securing screw against loosening the handle part.

Fig. 2 shows the receiving device that mechanically connects the pulling or moving wire after the insulation piece and interrupts its electrical conductivity.

• - The so-called handle plug that the train or movement rod takes up.
• - The main part of the handle that carries the insulation piece ( Fig. 1) and the tube with the working end.
• - The pipes interrupted by Fig. 1.
• - The traction or movement wire interrupted by Fig. 2.
• - The insulation loop, which is outside of the insulation piece extends to the end of work.
• - The insulation hose that runs through the entire instrument pulls.

The tube that is also the carrier of the working end is separated by Fig. 1.

The connection for the HF current is above the pipe end where the working end of the instrument sits. So this current flows only in one direction, towards the end of work. By train - or Movement rod can the current back towards the end of the handle flow.

For this reason, this is covered with an insulation hose and ends in part Fig. 2. The current flow is interrupted by Fig. 2 and the mechanical movement between the end of work and the plug-in part is passed on.

The metal handle therefore does not need an insulation jacket be covered.

Claims (4)

1. Isolation unit for surgical instruments, which are operated using high-frequency electrical current, characterized in that the isolation unit consists of two insulation pieces, namely a connector between the working end and the handle end of the instrument and a receiving device for receiving the handle-side end of the mechanical movement mediation medium on the Handle side of the instrument, which consists of any mechanically strong, but electrically non-conductive material. 2. Isolation unit according to claim 1, characterized in that the insulation pieces are made of plastic or ceramic. 3. Surgical instruments, characterized in that they are under Use of the insulation unit according to claim 1 or 2 ago are posed. 4. Surgical instruments according to claim 3 characterized thereby records that it has a metallic lock or detent are provided.