Electrosurgical device

• US 3,870,047 A
• Filed: 11/12/1973
• Issued: 03/11/1975
• Est. Priority Date: 11/12/1973
• Status: Expired due to Term

• Current Assignee: Donald I. Gonser
• Original Assignee: Donald I. Gonser
• Inventors: Gonser, Donald I.
• Primary Examiner(s): Gaudet, Richard A.
• Assistant Examiner(s): Cohen, Lee S.
• Application Number:
  US05/414,646
• Time in Patent Office: 484 Days
• Field of Search: 128/303.14,303.13,303.17,303.18,303.19,405 339/177E
• US Class Current: 606/45
• CPC Class Codes: A61B 18/12 by passing a current through the tissue to be heated, e.g. high-frequency current
• CPC Class Codes: A61B 18/1206 Generators therefor
• CPC Class Codes: A61B 18/14 Probes or electrodes therefor
• CPC Class Codes: A61B 18/1402 Probes for open surgery
• CPC Class Codes: A61B 2018/00178 Electrical connectors
• CPC Class Codes: A61B 2018/0066 without feedback, i.e. open loop control

Abstract

An electrosurgical device in which high frequency electrical energy powers a cutting electrode. Radio frequency energy is set up in a driver coil and a driven coil mounted in a handpiece. The driver coil energizes the driven coil to energize a surgical electrode connected to one end of the driven coil. Connection between the source of radio frequency energy and the driver coil includes a circuit in which condensers and impedances are so connected that, if there is a failure of the condensers, energy is dissipated. Sonic warning signals indicate production of cutting, coagulating, and blended currents.

Claims

1. In an electrosurgical device, the combination of a coaxial cable including a central lead and an outer conductor and means for generating a radio-frequency current of an electrosurgical frequency in the central lead of the coaxial cable, with a handpiece which comprises an elongated core, a first coil and a second coil wound on said core, means for supporting an electrosurgical electrode mounted at one end of the core, socket means mounted on the opposite end of the core, the socket means receiving an end connector portion of the coaxial cable, the socket means having a power contact, the power contact being connected to the central lead of the coaxial cable, means for connecting one end of the first coil to the electrode holder, means for connecting one end of the second coil to the power contact, whereby an electrosurgical current is induced in the electrode, a condenser, and means for coupling the other end of the second coil to the outer conductor through the condenser.

2. A device as in claim 1 wherein the other end of the first coil is connected to the power contact.

3. A device as in claim 1 wherein a dielectric sleeve surrounds the coils and the socket means.

4. In an electrosurgical device, the combination of a coaxial cable including a central lead and an outer conductor and means for generating a radio-frequency current of an electrosurgical frequency in the central lead of the coaxial cable, with a handpiece which comprises an elongated core, a first coil and a second coil wound on said core, means for supporting an electrosurgical electrode mounted at one end of the core, socket means mounted on the opposite end of the core, the socket means receiving an end connector portion of the coaxial cable, the socket means having a power contact, the power contact being connected to the central lead of the coaxial cable, means for connecting one end of the first coil to the electrode holder, means for connecting one end of the second coil to the power contact, whereby an electrosurgical current is induced in the electrode, and a condenser mounted in the handpiece, the other end of the second coil being coupled to ground through the condenser and the outer conductor of the coaxial cable, the other end of the first coil being connected to the powEr contact.

5. In an electrosurgical device, the combination of a coaxial cable including a central lead and an outer conductor and means for generating a radio-frequency current of an electrosurgical frequency in the central lead of the coaxial cable, with a handpiece which comprises an elongated core, a first coil and a second coil wound on said core, means for supporting an electrosurgical electrode mounted at one end of the core, socket means mounted on the opposite end of the core, the socket means receiving an end connector portion of the coaxial cable, the socket means having a power contact, means connecting the power contact to the central lead of the coaxial cable, means for connecting one end of the first coil to the electrode holder, means for connecting one end of the second coil to the power contact, whereby an electrosurgical current is induced in the electrode, and a condenser, the socket means including a ground contact connected to the outer conductor of the coaxial cable, and the other end of the second coil being coupled to the ground contact through the condenser.

6. In an electrosurgical device, the combination of a coaxial cable having a central lead and an outer conductor and means for generating a radio-frequency current of an electrosurgical frequency in the central lead of the coaxial cable, with a handpiece which comprises a first coil, a second coil inductively coupled to the first coil, an electrode, means for connecting one end of the first coil to the electrode, means for connecting one end of the second coil to the central lead, and a condenser, the other end of the second coil being coupled to the outer conductor through the condenser, the second coil powering the first coil and the electrode, the outer conductor preventing radio-frequency leakage between the generating means and the handpiece.