Method and device for retrieving materials from body lumens
First Claim
Patent Images
1. A retrieval catheter comprising:
- a hollow elongate body having proximal and distal ends;
a flexible loop member, having first and second securing ends, secured to the distal end of the body by the first securing end;
a slack net secured within the flexible loop; and
means for opening and collapsing the loop, whereby the slack net can be opened in order to capture material and closed in order to secure the captured material.
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Accused Products
Abstract
A retrieval catheter (10) for removing deleterious materials (S) from body lumens has an elongate catheter body (12) having a slack net (26) at its distal end (16). The slack net may be collapsed to facilitate introduction into the body lumen and opened in situ to permit capture and retrieval of the deleterious materials. A method for removing ureteral stones from the ureter is described.
808 Citations
26 Claims
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1. A retrieval catheter comprising:
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a hollow elongate body having proximal and distal ends; a flexible loop member, having first and second securing ends, secured to the distal end of the body by the first securing end; a slack net secured within the flexible loop; and means for opening and collapsing the loop, whereby the slack net can be opened in order to capture material and closed in order to secure the captured material. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A retrieval catheter comprising:
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an elongate body having proximal and distal ends; a pull wire having proximal and distal ends and being slidably mounted within the elongate body, wherein the distal end of the pull wire extends distally of the distal end of the said body; a flexible loop member, having first and second securing ends, wherein the first securing end is attached to the distal end of the elongate body and the second securing end is attached to the pull wire near the distal end of said pull wire; and a slack net attached to the flexible loop, whereby the net can be shifted between an open and a closed configuration by axially shifting the pull wire relative to the elongate body. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A method for retrieving material in a body lumen, said method comprising:
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introducing a hollow catheter body to the lumen, said catheter body having a collapsed slack net attached to a loop having two ends, one end being secured to a distal end of the catheter body; moving the collapsed slack net past the material; opening the slack net so that said net will extend across a portion of the cross section of the body lumen greater than a cross section of the catheter; manipulating the slack net and optionally the catheter body; capturing material within the opened slack net; collapsing the slack net on the captured material; and withdrawing the catheter body from the lumen. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26)
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Specification