Calculus removal
First Claim
Patent Images
1. An instrumnent for treating an internal organ which is obstructed by a calculus, comprising;
- an elongate catheter sheath that extends along an axis from a proximal end to a distal end and is sized for insertion into said organ,a basket-form calculus grasper formed of flexible wires arranged to be extended from and withdrawn within the distal end of said catheter sheath such that, when extended from the distal end of said sheath, said wires are spaced to permit passage of said calculus and when withdrawn at least partially into said catheter sheath, said wires collapse in a manner to capture said calculus,a tension element coupled to said grasper,a handle at the proximal end of said catheter sheath that receives said tension element and houses an operating assembly to apply axial force to said tension element for extending or withdrawing said grasper from said distal end of said sheath and for rotating said grasper about said axis relative to the sheath,said operating assembly including a manual actuator and a mechanical actuator,said manual actuator is coupled to said tension element and arranged to apply axial force to said tension element for extending said grasper from said distal end of said sheath and for imparting rotational motion to said tension element for rotating said grasper about said axis relative to the sheath to a desired orientation, andsaid mechanical actuator is arranged to apply axial force to said tension element for withdrawing said grasper with mechanical advantage.
1 Assignment
0 Petitions
Accused Products
Abstract
Grasping an object, e.g., a calculus in the biliary tract, using a grasper, such as a basket, that can be opened and closed without mechanical advantage and also rotated about the device axis to make it easier to capture the object. The basket can then be closed further with mechanical advantage to crush the object.
-
Citations
26 Claims
-
1. An instrumnent for treating an internal organ which is obstructed by a calculus, comprising;
-
an elongate catheter sheath that extends along an axis from a proximal end to a distal end and is sized for insertion into said organ, a basket-form calculus grasper formed of flexible wires arranged to be extended from and withdrawn within the distal end of said catheter sheath such that, when extended from the distal end of said sheath, said wires are spaced to permit passage of said calculus and when withdrawn at least partially into said catheter sheath, said wires collapse in a manner to capture said calculus, a tension element coupled to said grasper, a handle at the proximal end of said catheter sheath that receives said tension element and houses an operating assembly to apply axial force to said tension element for extending or withdrawing said grasper from said distal end of said sheath and for rotating said grasper about said axis relative to the sheath, said operating assembly including a manual actuator and a mechanical actuator, said manual actuator is coupled to said tension element and arranged to apply axial force to said tension element for extending said grasper from said distal end of said sheath and for imparting rotational motion to said tension element for rotating said grasper about said axis relative to the sheath to a desired orientation, and said mechanical actuator is arranged to apply axial force to said tension element for withdrawing said grasper with mechanical advantage. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
-
-
15. An instrument for grasping or crushing a calculus, comprising:
-
an elongate catheter sheath that extends along an axis from a proximal end to a distal end and is sized for insertion into a body, a basket-form calculus grasper formed of flexible wires arranged to be extended from and withdrawn within the distal end of said catheter sheath such that, when extended from the distal end of said sheath, said wires are spaced to permit passage of said calculus and when withdrawn at least partially into said catheter sheath, said wires collapse in a manner to capture said caculus, a tension element coupled to said grasper, a handle at the proximal end of said catheter sheath that receives said tension element and houses an operating assembly to apply axial force to said tension element for extending or withdrawing said grasper from said distal end of said sheatlh and for rotating said grasper about said axis relative to the sheath, said operating assembly including a manual control knob directly connected to said tension element and arranged for applying axial force to said tension element for extending said grasper from said distal end of said sheath and for imparting rotational motion to said tension element for rotating said grasper about said axis relative to the sheath to a desired orientation, and a mechanical actuator arranged to apply axial force to said tension element for withdrawing said grasper with mechanical advantage, said mechanical actuator including an engaging piece cooperatively constructed with said tension element to bear on said tension element to apply axial force when said tension element is in various rotational states. - View Dependent Claims (16, 17, 18, 19, 20)
-
-
21. An instrument for treating an internal organ which is obstructed by a calculus, comprising:
-
a catheter sheath that extends along an axis from a proximal end to a distal end and is sized for insertion into said organ, a basket-form calculus grasper including flexible wires arranged to be extended from and withdrawn within the distal end of said catheter sheath such that, when extended from the distal end of said sheath, said wires are spaced to permit passage of said calculus and when withdrawn at least partially into said catheter sheath, said wires collapse in a manner to capture said calculus, a tension element coupled to said grasper, a handle at the proximal end of said catheter sheath that receives said tension element and houses an operating assembly to apply axial force to said tension element for extending or withdrawing said grasper from said distal end of said sheath, wherein said tension element has an outer engaging surface along a segment and said operating assembly includes a complementary jam element for applying axial force to said tension element. - View Dependent Claims (22, 23, 24)
-
-
25. An instrument for grasping or crushing a calculus, comprising:
-
a catheter sheath that extends along an axis from a proximal end to a distal end and is sized for insertion into a body, a basket-form calculus grasper including flexible wires arranged to be extended from and withdrawn within the distal end of said catheter sheath such that, when extended from the distal end of said sheath, said wires are spaced to permit passage of said calculus and when withdrawn at least partially into said catheter sheath, said wires collapse in a manner to capture said calculus, a tension element coupled to said grasper, a handle at the proximal end of said catheter sheath that receives said tension element and houses an operating assembly to apply axial force to said tension element for extending or withdrawing said grasper from said distal end of said sheath, wherein said tension element has an engaging surface, and said operating assembly includes an actuator for actuation by the user, and an engaging piece actuated by said actuator for bearing on said surface for applying axial force, said engaging piece including a deforming portion that deforms when a predetermined tension is applied to said tension element. - View Dependent Claims (26)
-
Specification