Retraction force sensing basket

• US 10,349,961 B2
• Filed: 07/11/2017
• Issued: 07/16/2019
• Est. Priority Date: 06/25/2015
• Status: Active Grant

• Current Assignee: Gyrus ACMI, Inc. (Olympus Corporation)
• Original Assignee: Gyrus ACMI, Inc. (Olympus Corporation)
• Inventors: St. George, Lawrence J., Gavala, Artemie G.
• Primary Examiner(s): Dang, Phong Son H
• Application Number:
  US15/646,479
• Publication Number:
  US 20170303945A1
• Time in Patent Office: 735 Days
• CPC Class Codes: A61B 17/22031 Gripping instruments, e.g. forceps, for removing or smashing calculi A61B17/221 takes precedence
• CPC Class Codes: A61B 17/221 Gripping devices in the form of loops or baskets for gripping calculi or similar types of obstructions surgical snare instruments A61B17/32056
• CPC Class Codes: A61B 17/2833 Locking means
• CPC Class Codes: A61B 17/2909 Handles
• CPC Class Codes: A61B 17/32056 Surgical snare instruments for removing or smashing calculi A61B2017/2212; tonsillotomes A61B17/26
• CPC Class Codes: A61B 2017/00119 alarm; indicating an abnormal situation
• CPC Class Codes: A61B 2017/00128 related to intensity or progress of surgical action
• CPC Class Codes: A61B 2017/00407 Ratchet means
• CPC Class Codes: A61B 2017/00455 Orientation indicators, e.g. recess on the handle
• CPC Class Codes: A61B 2017/2212 having a closed distal end, e.g. a loop
• CPC Class Codes: A61B 2017/2837 with a locking ratchet
• CPC Class Codes: A61B 2017/291 the position of the handle being adjustable with respect to the shaft
• CPC Class Codes: A61B 2017/2923 Toothed members, e.g. rack and pinion
• CPC Class Codes: A61B 2017/2924 Translation movement of handle without rotating movement
• CPC Class Codes: A61B 2090/034 abutting on parts of the device itself
• CPC Class Codes: A61B 2090/064 for measuring force, pressure or mechanical tension
• CPC Class Codes: A61B 2090/0807 Indication means
• CPC Class Codes: A61B 90/03 Automatic limiting or abutting means, e.g. for safety

Abstract

A stone retrieval device includes a sheath and a stone retrieval basket that includes a distal region with a plurality of basket wires and a proximal region with one or more core wires. The stone retrieval basket is contained within the sheath and is movable out a distal opening of the sheath to cause the plurality of basket wires to open into a basket shape. The stone retrieval device further includes a lock mechanism that locks the position of the stone retrieval basket with respect to the position of the sheath and a basket force controller that includes a first and a second control stage. The first control stage includes a sensor for measuring force on the stone retrieval basket when the lock mechanism is in an unlocked position, and the second control stage includes a sensor for measuring force when the lock mechanism is in a locked position.

Claims

1. A method of determining a force on a stone retrieval basket comprising:

capturing a stone with the stone retrieval basket;

measuring the force on the stone retrieval basket with a force sensor; and

providing an indication to a user of the stone retrieval basket to

determining if the force on the stone retrieval basket exceeds a predetermined maximum force, wherein the indication is one of visual, pop-up flag, tactile or sonic.

2. The method of claim 1, further comprising releasing the stone retrieval basket if the force on the stone retrieval basket exceeds the predetermined maximum force.

3. The method of claim 1, wherein capturing the stone comprises engaging a locking mechanism.

4. The method of claim 3, wherein engaging the locking mechanism includes engaging a ratchet mechanism.

5. The method of claim 4, wherein the ratchet mechanism includes a first protrusion associated with a first member and a set of notches associated with a second member, the first member being contained in the second member and movable relative to the second member, the first protrusion being engaged with one notch of the set of notches when the locking mechanism is in a locked position.

6. The method of claim 5, wherein the stone retrieval basket includes a distal region with a plurality of basket wires and a proximal region with one or more core wires, the stone retrieval basket being contained within a sheath and movable out of a distal opening of the sheath to cause the plurality of basket wires to open into a basket shape.

7. The method of claim 6, further comprises engaging the one or more core wires attached to a third member contained in the first member, the third member being movable relative to the first member and including a second protrusion, the second protrusion being engaged with the first protrusion when the locking mechanism is in the locked position.

8. The method of claim 7, wherein moving the third member relative to the first member pulls the plurality of basket wires into the distal opening of the sheath.