Endoscopic instrument

• US 5,281,220 A
• Filed: 01/13/1992
• Issued: 01/25/1994
• Est. Priority Date: 01/13/1992
• Status: Expired due to Fees

• Current Assignee: American Colloid Company (Minerals Technologies Incorporated)
• Original Assignee: Joseph W. Blake III
• Inventors: Blake, Joseph W. III
• Primary Examiner(s): Thaler, Michael H.
• Application Number:
  US07/819,771
• Time in Patent Office: 743 Days
• Field of Search: 606/205-208, 606/170, 606/171, 606/174, 606/47, 606/52, 606/51, 606/142, 606/148, 606/113, 606/46, 128/751
• US Class Current: 606/46
• CPC Class Codes: A61B 17/29 Forceps for use in minimally invasive surgery
• CPC Class Codes: A61B 2017/2929 with a head rotatable about the longitudinal axis of the shaft
• CPC Class Codes: A61B 2018/1861 with an instrument inserted into a body lumen or cavity, e.g. a catheter

Abstract

An improved endoscopic instrument suitable for performing internal procedures through a trocar in which the instrument handle is provided with a control mechanism for rotating the instrument thereby enabling a surgeon to manipulate and utilize the instrument with one hand.

Claims

1. An endoscopic instrument comprising a handle assembly having a fixed grip and a movable grip pivoted to the fixed grip, an elongate tube having one end fitted to the handle assembly for rotation of the tube about its longitudinal axis and another end mounting instrument working components, a linkage extending through the tube and interconnecting the components with the handle assembly so the components are actuated by manipulation of the movable grip by one hand, control means slidably mounted on the handle assembly for rotating the tube, the control means having a cylindrical portion fitted to and coaxial with the tube and having a depending integral finger loop available for manipulation by the index finger of the one hand, and means interconnecting the cylinder and tube so that a linear movement of the cylinder induces rotary movement of the tube and components.

2. An instrument as defined in claim 1 in which the means interconnecting the cylinder and tube comprises a spiral cam groove on the cylinder and a cam follower on the tube positioned in the cam groove.

3. An instrument as defined in claim 2 in which the spiral cam groove accommodates up to 360 deg. rotation of the instrument components.

4. An instrument as defined in claim 1 in which the working components are one on the following:

scissors, cautery, forceps, graspers, dissectors, ligator, or an endoloop.

5. An endoscopic instrument comprising a housing formed of confronting plates joined at their peripheries and defining an upper chamber and a depending handle assembly having a fixed grip and a movable lever,

an elongate tube having one end fitted to the housing and another end deploying operating components, a linkage extending through the tube and interconnecting the components with the handle assembly so the components are actuated by manipulation of the movable lever,

the tube, linkage and operating components being mounted on the housing for rotation as a unit about the long axis of the tube;

means forming part of the handle assembly for rotating the tube about said axis utilizing the same hand employed for actuation of the operating components,

and the means for rotating including a slidable member having a finger loop positioned adjacent the fixed grip and having a barrel cam fitted onto the tube within the upper chamber, a spiral groove extending circumferentially of the cam, a cam follower on the tube engaging the groove so that movement of the finger loop by the same hand employed for actuation of the operating components causes rotation of the components about the long axis.

6. An instrument as defined in claim 5 in which the spiral cam groove accommodates up to 360 deg. rotation of the operating components.

7. An instrument as defined in claim 5 in which the operating components are one of the following:

scissors, cautery, forceps, graspers, dissectors, ligator, or an endoloop.