Apparatus for removal of objects from body passages

• US 4,865,030 A
• Filed: 01/21/1987
• Issued: 09/12/1989
• Est. Priority Date: 01/21/1987
• Status: Expired due to Term

• Current Assignee: Ams Research Corporation (Endo International PLC)
• Original Assignee: American Medical Systems Incorporated (Endo International PLC)
• Inventors: Polyak, Mark
• Primary Examiner(s): Thaler, Michael H.
• Application Number:
  US07/006,730
• Time in Patent Office: 965 Days
• Field of Search: 128/321, 128/356, 128/328, 128/303 R, 294/65.5, 294/2, 294/100
• US Class Current: 606/108
• CPC Class Codes: A61B 17/22031 Gripping instruments, e.g. forceps, for removing or smashing calculi A61B17/221 takes precedence
• CPC Class Codes: A61B 17/29 Forceps for use in minimally invasive surgery
• CPC Class Codes: A61B 17/52 Magnets
• CPC Class Codes: A61B 2017/22035 for retrieving or repositioning foreign objects
• CPC Class Codes: A61B 2017/2933 camming or guiding means
• CPC Class Codes: A61F 6/18 Inserters or removers ; Apparatus for loading an intra-uterine device into an insertion tube
• CPC Class Codes: B25J 15/0608 with magnetic holding means

Abstract

An apparatus for insertion into the urethra for attachment to and removal of an in-dwelling urinary continence device comprises generally a tubular body having a longitudinal bore with a slidable shaft therein. Slidable jaws are connected to a first end of the shaft and are normally retained in a closed position within the bore. The shaft may be longitudinally displaced within the bore to cause the jaws to protrude therefrom and assume an opened position. A magnet, slidable within the jaws, protrudes from the jaws when they are in their opened position to attract a ferrous ball for retraction into the jaws. The apparatus employs a method for removing an intraurethral device wherein anchoring members holding the device in place may be collapsed and the device removed with a single insertion of the tool. The device may also be used for retrieving objects from body passages other than the urethra, for example, arteries.

Claims

1. A removal tool for use in body passageways, comprising:

a tubular sleeve adapted to be inserted into a passageway, said sleeve having a bore extending from its rearward end to its forward end;

a shaft longitudinally slidable within said bore between a rearward position and a longitudinally spaced forward position;

a magnet attached to a forward end of said shaft and slidable with said shaft in said bore; and

normally closed jaws connected around the forward end of said sleeve and shaped internally to define a cavity for gripping or trapping an object, said jaws opening forward of said sleeve to enable said magnet to project forward of said cavity upon forward movement of said shaft through said bore.

2. The tool of claim 1, further comprising

a relatively soft, flexible tubular body having a longitudinal bore for housing said tubular sleeve and said jaws.

3. The tool of claim 2, wherein said jaws are slidable between a first retracted position substantially within the forward end of said tubular body and a second extended position substantially forward of said forward end of said tubular body.

4. The tool of claim 1, further comprising

a handle connected to the rearward end of said shaft external of the rearward end of said sleeve.

5. The tool of claim 4, further comprising

a spring connected to said handle to resist forward movement of said shaft through said bore.

6. The tool of claim 1, wherein

said sleeve includes a shoulder at its rearward end and projecting inwardly of said bore to define the rearwardmost position of said shaft relative to said sleeve.

7. The tool of claim 1, wherein

said jaws comprise a plurality of jaw segments, said segments responsive to forward movement of said shaft to separate outwardly.

8. A grasping tool for use in a passageway, comprising:

an elongated tubular body defining a central axial bore extending from a forward end to a rearward end of said body, said body adapted to be inserted into a passageway;

an elongated shaft movably fitted within said bore to move between a rearward retracted position and a forward extended position;

forward opening jaws positioned within the forward end of said bore, said jaws configured to open upon the application of forces directed radially outward against said jaws; and

a magnet at the forward end of said shaft and configured to apply a radially outward force on said jaws upon movement of said shaft toward its forward position,

with said jaws being slidable between a first retracted position within said bore and substantially within the forward end of said tubular body and a second extended position substantially external of said bore and substantially forward of said forward end of said tubular body.

9. The tool of claim 8, wherein

said tubular body is tapered in thickness at its forward end to form a circumferential lip.

10. A grasping tool for use in a passageway, comprising:

an elongated tubular body defining a central axial bore extending from a forward end to a rearward end of said body, said body adapted to be inserted into a passageway;

an elongated shaft movably fitted within said bore to move between a rearward retracted position and a forward extended position;

forward opening jaws positioned within the forward end of said bore, said jaws configured to open upon the application of forces directed radially outward against said jaws; and

a magnet at the forward end of said shaft and configured to apply a radially outward force on said jaws upon movement of said shaft toward its forward position,

said jaws being shaped internally to define a forward cavity and a rearward passageway, the interior of said passageway configured to receive said magnet such that said magnet applies an axial force to move the jaws forward and a radial opening force to said jaws upon forward movement of said shaft to thereby open said jaws and said cavity and enable said magnet to protrude through said cavity.

11. The tool of claim 10 in combination with an indwelling urethral device including an anchoring member to anchor said device within said urethra and a removable closure member for collapsing said anchor member, said closure member including a magnetically inductive material adapted to be retained within said cavity upon closing of said jaws.

12. A tool for removing an object from a passageway in a human or animal body, comprising:

a tubular body adapted to be inserted into a passageway, said body having a forward end, a rearward end and a longitudinal bore therethrough;

a normally-closed receptacle at said forward end of said body remotely operable from said rearward end of said body to open to receive an object from within said passageway, said object being received within a cavity in said receptacle; and

a magnet normally positioned within said receptacle and remotely operable from said rearward end of said body to be extended to a position forward and external of said cavity when said receptacle is open and to be retracted into said receptacle.

13. The tool of claim 12, wherein

said receptacle is slidable from a first, closed position within said bore to a second, open position forward and external of said bore.

14. The tool of claim 13, further comprising

an injector for injecting a fluid into said bore for moving said receptacle to its said second, open position;

and

a spring for biasing said receptacle toward its said first, closed position.

15. The tool of claim 14, wherein said fluid is relatively incompressible.

16. The tool of claim 12, further comprising

a shaft longitudinally movable within said bore and extending at its rearward end out from the rearward end of said bore, said shaft connected at its forward end to said magnet.

17. The tool of claim 16, wherein

said magnet is configured to move said receptacle forward and open said receptacle upon forward movement of said shaft within said bore.

18. The tool of claim 16, wherein said magnet is configured to open said receptacle upon forward movement of said shaft within said bore.

19. A tool for use in removing an intraurethral device from a urethra which comprises:

a soft, flexible tubular body having forward and rearward ends corresponding to the front and rear of the tool and an axial bore extending between said ends, said body adapted at its forward end to be inserted into a urethra;

a tubular sleeve longitudinally movable between longitudinally spaced forward and rearward positions within said bore;

a set of normally closed, forward facing jaws fitted within said forward end of said bore and attached at their rearward ends to the forward end of said sleeve, said jaws configured internally to define a passageway substantially co-axial with said sleeve and extending forward into said jaws;

said jaws further configured internally forward of said passageway to define a cavity;

a shaft fitted within said sleeve in longitudinally slidable relation with said sleeve, said shaft having a rearward end which extends beyond the rearward ends of said body and said sleeve; and

a magnet attached at its rearward end to the forward end of said shaft and extending forward into said passageway to terminate in a configuration adapted to move forward and open said jaws and to pass forward of said cavity upon forward movement of said shaft relative to said sleeve when said sleeve is in its said forward position.

20. The tool of claim 19 in combination with an indwelling-type urethral device, said device comprising:

an anchor member to anchor said device in a urethra; and

a removal member on said anchor member operable to collapse said anchor member, said removal member including a magnetically inductive material capable of being held by said magnet and also fitting within said cavity.