Placement of chronic micro-catheter device and method
First Claim
Patent Images
1. A guide device, having a guide axis, comprising:
- a sheath that defines a radially enclosed longitudinal cavity in a first state, and has a longitudinal weakened portion to allow the sheath to be split substantially along a longitudinal wall and radially removed from the guide axis in a second state;
a mandrel, having an axial portion and a plurality of dividing members extending radially from the axial portion, the mandrel, when inserted into the sheath in its first state, defines a plurality of substantially continuous longitudinal guide regions, each guide region bounded by a longitudinal portion of the mandrel, and by a longitudinal portion of the sheath; and
a shield portion on the mandrel, wherein when the mandrel is fully inserted in the sheath, the shield portion substantially shields a distal opening in the sheath in its first state.
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Abstract
A device and method of placement of a chronic micro-catheter is shown that allows effective guiding of micro-catheters through a host catheter that is later removable while leaving the micro-catheter implanted in place within the patient. The novel configuration allows the micro-catheter to be completely radially enclosed during insertion, and still allows the host catheter to be removed, leaving the micro-catheter behind. Additionally, the configuration allows several micro-catheters to be placed at any number of depths and orientations while still using a minimally invasive host catheter.
60 Citations
21 Claims
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1. A guide device, having a guide axis, comprising:
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a sheath that defines a radially enclosed longitudinal cavity in a first state, and has a longitudinal weakened portion to allow the sheath to be split substantially along a longitudinal wall and radially removed from the guide axis in a second state; a mandrel, having an axial portion and a plurality of dividing members extending radially from the axial portion, the mandrel, when inserted into the sheath in its first state, defines a plurality of substantially continuous longitudinal guide regions, each guide region bounded by a longitudinal portion of the mandrel, and by a longitudinal portion of the sheath; and a shield portion on the mandrel, wherein when the mandrel is fully inserted in the sheath, the shield portion substantially shields a distal opening in the sheath in its first state. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method of insertion of a medical device comprising:
inserting a guide device into a patient to a target location, the guide device including a mandrel, a sheath, and a blunt tipped shield portion near an end of the mandrel to protect a distal opening of the guide device while inserting the guide device; wherein inserting the guide device includes; inserting the mandrel with the blunt tipped shield portion near the end of the mandrel into the sheath; positioning the blunt tipped shield portion near a distal opening of the sheath; and inserting the sheath and mandrel with the blunt tipped shield portion into the patient. inserting a primary medical device into the guide device to the target location; removing the guide device from the patient without moving the primary medical device from the target location; wherein the guide device is radially removed from the primary medical device. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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19. An insertion system comprising:
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a guide device, having a guide axis, comprising; a sheath that defines a radially enclosed longitudinal cavity in a first state, and is adapted to be split substantially along a longitudinal wall and radially removed from the guide axis in a second state; a mandrel that, when inserted into the sheath in its first state, defines a substantially continuous longitudinal guide region bounded on a first longitudinal portion by the mandrel, and on a second longitudinal portion by the sheath; a primary medical device capable of insertion through the guide region; a shield portion, such that when the mandrel is fully inserted in the sheath, the shield portion substantially shields a distal opening in the sheath in its first state; and a ramp located near a distal end of the guide region between a proximal end of the mandrel and the shield portion, the ramp directing the distal end of the guide region at least partially radially outward from the guide axis. - View Dependent Claims (20, 21)
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Specification