Automatic retractable safety penetrating instrument

• US 5,676,156 A
• Filed: 05/03/1995
• Issued: 10/14/1997
• Est. Priority Date: 08/14/1991
• Status: Expired due to Fees

• Current Assignee: Inbae Yoon
• Original Assignee: Inbae Yoon
• Inventors: Yoon, InBae
• Primary Examiner(s): Rimell, Sam
• Assistant Examiner(s): WINGOOD, PAMELA LYNN
• Application Number:
  US08/406,218
• Time in Patent Office: 895 Days
• Field of Search: 128/751, 128/752, 128/753, 128/754, 128/658, 606/184
• US Class Current: 600/567
• 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 17/3474 Insufflating needles, e.g. Veress needles
• 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 17/3498 Valves therefor, e.g. flapper valves, slide valves haemostasis valves A61M39/06; check valves A61M39/24
• CPC Class Codes: A61B 2017/00477 Coupling A61B2017/0046 takes precedence
• CPC Class Codes: A61B 2017/3454 Details of tips
• CPC Class Codes: A61B 2017/3484 Anchoring means, e.g. spreading-out umbrella-like structure
• CPC Class Codes: A61B 2090/08021 of the patient or his organs
• CPC Class Codes: A61B 2090/0811 for the position of a particular part of an instrument with respect to the rest of the instrument, e.g. position of the anvil of a stapling instrument

Abstract

An automatic retractable safety penetrating instrument for introduction of sleeves, such as portal sleeves, cannulas and catheters, into anatomical cavities by means of penetrating members, such as solid tip trocars, other solid configuration obturators and cannulated penetrating members, such as needles, include locking and releasing mechanisms for automatic retraction of the penetrating member into the sleeve upon the sleeve entering the anatomical cavity. Various locking and releasing mechanisms are utilized for disposition in the penetrating member hub, in the shaft of the penetrating member or partially in the shaft and the hub, and the penetrating member can be made of telescoping distal and shaft sections to minimize the length of the penetrating member hub.

Claims

1. An automatic retractable safety penetrating instrument for introducing a sleeve into a cavity in the body comprising

a sleeve for providing a passage through a cavity wall and having a distal end for positioning in the body cavity, a proximal end for positioning externally of the body cavity and a lumen extending between said distal and proximal ends;

a penetrating member disposed in said lumen of said sleeve and having a longitudinal axis and a distal end for penetrating the cavity wall;

retracting means for moving said distal end of said penetrating member proximally relative to said sleeve from an extended position where said distal end of said penetrating member protrudes beyond said distal end of said sleeve to a retracted position within said sleeve, said retracting means including a plurality of first arms pivotally connected to one another and coupled with said distal end of said penetrating member, said first arms being biased toward a contracted configuration and being pivotally movable relative to one another to an expanded configuration, said first arms being in said expanded configuration when said distal end of said penetrating member is in said extended position and being in said contracted configuration when said distal end of said penetrating member is in said retracted position;

a locking and releasing mechanism for locking said first arms in said expanded configuration during penetration of the cavity wall and for releasing said first arms for movement to said contracted configuration to automatically move said distal end of said penetrating member to said retracted position in response to entry of said distal end of said sleeve in the body cavity; and

an operating mechanism including a distally biased operating member movable proximally during penetration of the cavity wall and movable distally upon entry of said distal end of said sleeve in the cavity to automatically release said first arms for movement to said contracted configuration.

2. An automatic retractable safety penetrating instrument for introducing a sleeve into a cavity in the body comprising

a sleeve for providing a passage through a cavity wall and having a distal end for positioning in the body cavity, a proximal end for positioning externally of the body cavity and a lumen extending between said distal and proximal ends;

a penetrating member disposed in said lumen of said sleeve and having a longitudinal axis and a distal end for penetrating the cavity wall;

retracting means for moving said distal end of said penetrating member proximally relative to said sleeve from an extended position where said distal end of said penetrating member protrudes beyond said distal end of said sleeve to a retracted position within said sleeve, said retracting means including a plurality of first arms pivotally connected to one another and coupled with said distal end of said penetrating member, said first arms being biased toward a contracted configuration and being pivotally movable relative to one another to an expanded configuration, said first arms being in said expanded configuration when said distal end of said penetrating member is in said extended position and being in said contracted configuration when said distal end of said penetrating member is in said retracted position, said retracting means including a retracting spring biasing said first arms toward said contracted configuration;

.

a locking and releasing mechanism for locking said first arms in said expanded configuration during penetration of the cavity wall and for releasing said first arms for movement to said contracted configuration to automatically move said distal end of said penetrating member to said retracted position in response to entry of said distal end of said sleeve in the body cavity; and

an operating mechanism including a distally biased operating member movable proximally during penetration of the cavity wall and movable distally upon entry of said distal end of said sleeve in the cavity to automatically release said first arms for movement to said contracted configuration.

3. An automatic retractable safety penetrating instrument as recited in claim 2 wherein said operating mechanism includes an operating spring biasing said second arms toward an expanded configuration while permitting movement of said second arms to a contracted configuration when said operating member is moved proximally.

4. An automatic retractable safety penetrating instrument for introducing a sleeve into a cavity in the body comprising

a sleeve for providing a passage through a cavity wall and having a distal end for positioning in the body cavity, a proximal end for positioning externally of the body cavity and a lumen extending between said distal and proximal ends;

a penetrating member disposed in said lumen of said sleeve and having a longitudinal axis and a distal end for penetrating the cavity wall;

retracting means for moving said distal end of said penetrating member proximally relative to said sleeve from an extended position where said distal end of said penetrating member protrudes beyond said distal end of said sleeve to a retracted position within said sleeve said retracting means including a plurality of first arms pivotally connected to one another and coupled with said distal end of said penetrating member, said first arms being biased toward a contracted configuration and being pivotally movable relative to one another to an expanded configuration, said first arms being in said expanded configuration when said distal end of said penetrating member is in said extended position and being in said contracted configuration when said distal end of said penetrating member is in said retracted position;

a locking and releasing mechanism for locking said first arms in said expanded configuration during penetration of the cavity wall and for releasing said first arms for movement to said contracted configuration to automatically move said distal end of said penetrating member to said retracted position in response to entry of said distal end of said sleeve in the body cavity; and

an operating mechanism including a distally biased operating member movable proximally during penetration of the cavity wall and movable distally upon entry of said distal end of said sleeve in the cavity to automatically release said first arms for movement to said contracted configuration, said operating mechanism including a plurality of second arms pivotally connected to one another and coupled with said operating member, said second arms biasing said operating member distally while permitting said operating member to move proximally during penetration of the cavity wall.