Releasable basket
First Claim
Patent Images
1. A medical device, comprising:
- a proximal handle;
a sheath extending distally from the handle and including a lumen extending therethrough from a distal end of the sheath to a proximal end of the sheath; and
at least two opposing loops having a collapsed position in which the loops are collapsed within the lumen of the sheath and another position in which the loops extend from the distal end of the sheath and out of the lumen, the loops being joined at a base and unattached to each other at their distal ends, the loops being moveable between an open position and a closed position with the loops being closer together at their distal ends when in the closed position than when in the open position to allow capture and release of material, at least one of the loops having a different length from the base to its distal end than at least one other of the loops, the loops moving between the closed and open positions by transitioning the loops between the collapsed position and the other position.
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Abstract
A medical retrieval device includes a basket formed of two or more loops. The basket may be used to retrieve material (e.g., a urinary stone) from a body. The basket opens and closes for end-encapsulation of a stone and is strengthened by support members that interconnect the basket loops. A captured stone may be released from the basket with the basket still in the body by opening the loops.
299 Citations
37 Claims
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1. A medical device, comprising:
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a proximal handle;
a sheath extending distally from the handle and including a lumen extending therethrough from a distal end of the sheath to a proximal end of the sheath; and
at least two opposing loops having a collapsed position in which the loops are collapsed within the lumen of the sheath and another position in which the loops extend from the distal end of the sheath and out of the lumen, the loops being joined at a base and unattached to each other at their distal ends, the loops being moveable between an open position and a closed position with the loops being closer together at their distal ends when in the closed position than when in the open position to allow capture and release of material, at least one of the loops having a different length from the base to its distal end than at least one other of the loops, the loops moving between the closed and open positions by transitioning the loops between the collapsed position and the other position.- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A method for retrieving biological material from a body, comprising the steps of:
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inserting into a body a medical retrieval device comprising a proximal handle, a sheath extending distally from the handle and including a lumen extending therethrough from a distal end of the sheath to a proximal end of the sheath, and at least two opposing loops having a collapsed position in which the loops are collapsed within the lumen of the sheath and another position in which the loops extend from the distal end of the sheath and out of the lumen, the loops being joined at a base and unattached to each other at their distal ends, the loops move between an open position and a closed position with the loops being closer together at their distal ends when in the closed position than when in the open position to allow capture and release of material, at least one of the loops having a different length from the base to its distal end than at least one other of the loops, the loops moving between the closed and open positions by transitioning the loops between the collapsed position and the other position;
placing the loops in the position in which they extend from the distal end of the sheath and out of the lumen of the sheath;
capturing the biological material with the loops; and
,withdrawing the device from the body to remove the biological material from the body.
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19. A medical device, comprising:
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a proximal handle;
a sheath extending distally from the handle and including a lumen extending therethrough from a distal end of the sheath to a proximal end of the sheath;
at least two opposing loops having a collapsed position in which the loops are collapsed within the lumen of the sheath and another position in which the loops extend from the distal end of the sheath and out of the lumen, the loops being joined at a base and unattached to each other at their distal ends, the loops being moveable between an open position and a closed position with the loops being closer together at their distal ends when in the closed position than when in the open position to allow capture and release of material;
an elongated member disposed within the lumen of the sheath; and
at least one wire operably attached to at least one loop and to the elongated member, movement of the loops between the closed position and open positions being achieved by movement of the elongated member. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37)
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Specification