Device for bipolar high-frequency coagulation of biological tissue

Patent 4685459 Issued on August 11, 1987. Estimated Expiration Date:

March 6, 2006. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

Patent References

2596933

Electrically heated miniature thermal implement
Patent #: 3980861
Issued on: 09/14/1976
Inventor: Fukunaga

Method of and device for causing blood coagulation
Patent #: 4074719
Issued on: 02/21/1978
Inventor: Semm

Temperature control system with alarm and shut down for non-tracking condition of dual thermometers
Patent #: 4322594
Issued on: 03/30/1982
Inventor: Brisson

Circuit apparatus and method for electrothermal treatment of cancer eye Patent #: 4531524
Issued on: 07/30/1985
Inventor: Mioduski

Inventors

Assignee

Fischer MET GmbH

Application

No. 06/836968 filed on 03/06/1986

US Classes:

606/51, With forceps or tweezers219/234, Work in circuit219/241, With thermal control means606/40, Coagulation606/52With forceps or tweezers

Examiners

Primary: Cohen, Lee S.

Attorney, Agent or Firm

Jeffers, Hoffman & Niewyk

International Classes

A61B 18/12 (20060101)
A61B 18/14 (20060101)
A61B 17/00 (20060101)

Foreign Application Priority Data

1985-03-27 DE

Abstract

A device for bipolar high-frequency coagulation of biological tissue between two contact faces of a coagulating instrument. The two contact faces are connected to an output of a high-frequency generator. A temperature sensor is arranged near each of the two contact faces. A circuit for evaluating the measured temperatures and/or the temperature differential controls the coagulation temperature and the shutoff of the high-frequency generator as a preselected temperature or temperature differential is exceeded. Moreover, an indicating device is provided for acoustically and/or optically indicating the temperatures on the contact faces as well as the temperature differential between the contact faces.