Surgical cutting tool with automatically retractable blade assembly

• US 7,540,875 B2
• Filed: 09/22/2003
• Issued: 06/02/2009
• Est. Priority Date: 06/01/1998
• Status: Expired due to Fees

• Current Assignee: Thoracar Systems LLC
• Original Assignee: Avatar Design and Development Incorporated
• Inventors: Jessen, John W.
• Primary Examiner(s): Robert; Eduardo C.
• Assistant Examiner(s): Araj; Michael J
• Application Number:
  US10/457,040
• Publication Number:
  US 20040039406A1
• Time in Patent Office: 2,080 Days
• Field of Search: 606/82, 606/167, 606/170, 606/171, 606/174, 606/185, 606/168, 606/172, 606/181, 606/182, 301/62, 302/72, 303/14, 303/35
• US Class Current: 606/167
• CPC Class Codes: A61B 17/320016 Endoscopic cutting instruments, e.g. arthroscopes, resectoscopes A61B10/0233, A61B17/29, A61B17/3207 take precedence
• CPC Class Codes: A61B 17/32093 for skin incisions
• CPC Class Codes: A61B 17/3417 Details of tips or shafts, e.g. grooves, expandable, bendable; Multiple coaxial sliding cannulas, e.g. for dilating syringe needles A61M5/32; dilators A61M29/00
• CPC Class Codes: A61B 17/3496 Protecting sleeves or inner probes; Retractable tips for protecting body piercing guide needles A61M25/0612
• CPC Class Codes: A61B 2017/32004 having a laterally movable cutting member at its most distal end which remains within the contours of said end
• CPC Class Codes: A61M 16/0472 Devices for performing a tracheostomy

Abstract

Innovative disposable thoracostomy and cricothyrotomy trocar systems and new and improved methods for emergency management of upper airway obstructions and chest injuries are disclosed.

Claims

1. A surgical cutting tool comprising an automatically retractable blade assembly having a cam action double blade and a blunt penetration detector slide and a blade lock, which are operably interengaged as a double set of auto blade retraction releases, whereby triggering of the blunt penetration detector slide release frees the blade lock that holds back a second release, which when freed in turn, causes a set of blades to immediately retract to within a sheath.

2. A surgical cutting tool comprising an automatically retractable blade assembly having a cam action double blade and two sequentially operating auto blade retraction releases, a first blunt penetration detector slide release adapted to be activated by insertion of the tool into a body wall, to thus push back the first blunt release against spring tension into position to free a blade lock, such that when the tool penetrates through the body wall into a body cavity the blunt penetration detector slide is urged into forward motion by the spring, causing the retractable blade assembly to immediately retract to within a sheath.

3. A surgical cutting tool comprising an automatically retractable blade assembly having a cam action double blade and a two-stage auto blade retracting release mechanism, a first stage blunt penetration detector slide release adapted to be pushed back by insertion of the tool into a body wall, to thus move the blunt first release into position to free a blade lock, thereby activating a second stage release which, upon penetration of the tool through the body wall into a body cavity and forward motion of the blunt penetration detector slide, causes the retractable blade assembly to immediately retract to within a sheath.