The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 06, 1995
Filed:
Nov. 12, 1993
Thomas I Janicki, Shakerheights, OH (US);
Scott C Marlow, Chesterland, OH (US);
Haans K Petruschke, Kirtland, OH (US);
Donald B Coon, Chesterland, OH (US);
Marlow Surgical Technologies, Inc., Willoughby, OH (US);
Abstract
A verres needle system and method having a tube with an open distal end shaped for insertion through tissue into a body cavity, and a obturator slidably disposed within the tube and being resiliently biased to protrude from the distal end of the tube, and a negative pressure sensor positioned to detect negative pressure at a proximal end of the needle. The negative pressure sensor is connected to a circuit that the sensor closes a switch to eliminate a light when the pressure within the tube in obturator reaches a predetermined value, which indicates that the tip of the needle and obturator are positioned within a body cavity as supposed to body tissue or an organ. The method of utilizing the needle system is to insert the needle into the body cavity while at the same time pulling the tissues surrounding the body cavity away from the cavity to create the negative pressure, which is detected by the pressure sensor and circuit when the tip is properly positioned within the cavity.