 Multi purpose catheter assembly |
| What is claimed is: 1. An oxygen-suction catheter assembly including a first hollow tubular portion ... |
|
| Process for preparing laser knife |
| The present invention has been made in order to solve the above-mentioned problems. Specifically, ... |
|
| Orthopedic pins for external fixator |
| Accordingly, it is an object of the present invention to overcome one or more of the disadvantages ... |
|
| Ophthalmic device |
| I claim: 1. An ophthalmic device in the form of a cup defining an interior and having a periphery ... |
|
| Security device for detecting defects in transmitting fiber |
| In view of the foregoing, an object of this invention is to provide a damage detecting device which ... |
|
| Light diffuser for the photodynamic therapy of tumors in the oesophagus of a patient |
| What is claimed is: 1. A light diffuser for photodynamic therapy of a tumor in an oesophagus of a ... |
|
| Endoscope |
| The present invention has as its object the provision of an endoscope which can be readily inserted ... |
|
| Endoscopic device actuator and method |
| The present invention is directed to an actuator which allows the operator of an endoscope to ... |
|
| Arthroscopic tool combining five functions in one |
| The present invention includes a tool that combines a total of five functions into a single ... |
|
|
Three-part neutral electrode for a high frequency surgery device
| Details |
Inventors: Hagen, Uwe; Feucht, Peter;
Assignee: Siemens Aktiengesellschaft (Berlin and Munich, DE)
Primary Examiner: Cohen; Lee S.
Assistant Examiner:
Attorney, Agent or Firm: Hill, Van Santen, Steadman & Simpson
A neutral electrode for a high frequency surgery device has three planar sub-electrodes, which are arranged side by side on a carrier consisting of insulating material. To improve monitoring of the contact of the sub-electrodes with the body of the patient, the two outer sub-electrodes have substantially triangular contact surfaces, with the respective hypotenuses of the triangular contact surfaces proceeding parallel to and spaced from each other, with a central, strip-shaped sub-electrode disposed between the hypotenuses of the outer sub-electrodes. The neutral electrode is intended for use with a monitoring system which will activate an alarm if the neutral electrode becomes detached from the patient to such an extent that the danger of injury to the patient exists. This is accomplished by monitoring a current or currents flowing through the patient between sub-electrodes. The neutral electrode does not have an axis of symmetry along which a detachment of the neutral electrode from the patient could occur which would fail to cause a sufficient impedance change to trigger the alarm in time to avoid injury to the patient. |
|
DETAILED DESCRIPTION We claim as our invention: 1.
A neutral electrode for use with a high-frequency surgery device, said neutral electrode comprising: a carrier consisting of electrically insulating material and having a surface adapted for contact with a patient; first and second sub-electrodes disposed on said surface of said carrier, said first and second sub-electrodes each being substantially triangular and each having a side facing the other of said first and second sub-electrodes, said facing sides being spaced from and parallel to each other; and a third sub-electrode centrally disposed between said facing sides of said first and second sub-electrodes, said third electrode being strip-shaped.
2.
A neutral electrode as claimed in claim 1, wherein said first and second sub-electrodes are congruent triangles arranged on said surface of said carrier relative to said third sub-electrode so that said first, second and third sub-electrodes in combination form a rectangle.
3.
A neutral electrode as claimed in claim 1, wherein said first and second sub-electrodes are congruent triangles arranged on said surface of said carrier relative to said third sub-electrode so that said first, second and third sub-electrodes in combination form a square.
4.
A neutral electrode as claimed in claim 1, wherein said first and second sub-electrodes are right triangles and wherein said facing sides are the hypotenuses of said right triangles, and wherein said third sub-electrode has oppositely disposed narrow sides, each narrow side being .
aligned with a side of one of said right triangles so that said first, second and third sub-electrodes in combination form a rectangle.
5.
An electrode as claimed in claim 4, wherein said third sub-electrode has at least one end which is shortened and consists of two sides of said third sub-electrode so that said third sub-electrode has at least five sides.
6.
A neutral electrode as claimed in claim 1, wherein said first and second sub-electrodes are right triangles and wherein said facing sides are the hypotenuses of said right triangles, and wherein said third sub-electrode has oppositely disposed narrow sides, each narrow side being aligned with a side of one of said right triangles so that said first, second and third sub-electrodes in combination form a square
|
| Related patents |
|
|
Hypodermic needle safety clip
OF THE INVENTION In one embodiment of a unitary needle safety clip, as illustrated in FIG. 1, a thin piece of metal, molded plastic or other suitable material is formed ...
|
|
|
Adapter for coupling a photographic camera with a viewing device
What is claimed is: 1. An adapter for use with a photographic camera to join the camera to the proximal end of an optical viewing device such as an endoscope so that the ...
|
|
|
Sampling flow cell with diamond window
The embodiments of the invention in which an exclusive property of privilege is claimed are defined as follows: 1. In material analysis cell of the type in which the ...
|
|
|
Cryosurgical probe
It is an object of the invention to provide a cryogenic probe for percutaneous use which can be guided with safety and precision along arteries of the body to the target ...
|
|
|
Dynamic elbow support
In order to solve the problems described above, a dynamic joint support is provided which includes proximal and distal external bracing sections, respectively connected ...
|
|
|
Guide tube assembly
Accordingly, it is a primary object of the invention to obtain a guide tube assembly which serves both as a guide tube for the endoscope and the anesthetic suction tube. ...
|
|
|
Endoscope having adjustable forceps insertion inlet portion
It is, therefore, an object of the present invention to eliminate the above problem in the endoscope manufacturing art, and to provide endoscopes in which versions ...
|
|
|
Method for evaluation of transition region of silicon epitaxial wafer
In order to solve the problems based on the defects of the conventional methods, the present invention has as its object, the provision of a method for evaluating, in a ...
|
|
|
Pneumoneedle with removable stylet assembly
In the pneumoneedle of the present invention, the needle is secured to a handle having a longitudinal bore. The stylet forms part of an assembly removably received ...
|
|
|
Applanation tonometer using light reflection to determine applanation area size
Our tonometer objectively determines the size of an applanated area of the cornea. It does this by exploiting Snell's law of refraction which describes the ...
|
|
|
Communications 
