Slidable cannula and method of use
First Claim
1. A slidable cannula for delivering fluid to body tissue, comprising:
- an elongate tubular member having a proximal end, a distal end, and a lumen therebetween, the distal end having a preformed angled configuration relative to a proximal region, the angled region being bendable to a substantially linear configuration;
a substantially rigid trocar having a proximal end, a distal end and a lumen therebetween, the lumen shaped to receive the elongate tubular member in its linear configuration; and
a balloon occluder mounted on the distal end of the trocar, the balloon occluder communicating with the proximal end of the trocar,wherein the tubular member is slidable through the lumen of the trocar, and wherein the tubular member regains its angled configuration when advanced distally beyond the distal end of the trocar.
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Accused Products
Abstract
A cannula system having an internally slidable elongate tubular member frictionally anchored within a trocar, and optionally including a flange which acts as a positive stop against the trocar, that can be deployed for various treatments, including aortic cannulation during cardiopulmonary bypass, for example during CABG surgery. The tubular member has a proximal end, a lumen, and a flexible distal end which carries a preformed angled configuration relative to its proximal region and is bendable to a substantially linear configuration. The rigid trocar maintains the cannula in a substantially linear configuration. When the cannula is advanced through the lumen beyond the distal end of the trocar, the tubular member regains its angled configuration. Methods for using the devices herein are also disclosed.
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Citations
84 Claims
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1. A slidable cannula for delivering fluid to body tissue, comprising:
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an elongate tubular member having a proximal end, a distal end, and a lumen therebetween, the distal end having a preformed angled configuration relative to a proximal region, the angled region being bendable to a substantially linear configuration; a substantially rigid trocar having a proximal end, a distal end and a lumen therebetween, the lumen shaped to receive the elongate tubular member in its linear configuration; and a balloon occluder mounted on the distal end of the trocar, the balloon occluder communicating with the proximal end of the trocar, wherein the tubular member is slidable through the lumen of the trocar, and wherein the tubular member regains its angled configuration when advanced distally beyond the distal end of the trocar. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 27)
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20. A method for cannulating a body tissue, comprising the steps of:
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providing a slidable cannula comprising an elongate member having a proximal end, a distal end, and a lumen therebetween, the distal end having a preformed angled configuration relative to the proximal region, the slidable cannula further comprising a trocar having a proximal end, a distal end, and a lumen shaped to receive the elongate tubular member and a balloon occluder mounted on the distal end of the trocar, the balloon occluder communicating with the proximal end of the trocar; inserting the elongate tubular member into the lumen of the trocar, the trocar maintaining the tubular member in a substantially linear configuration; and advancing the distal end of the tubular member beyond the distal end of the trocar, wherein the distal end of the tubular member regains its preformed angle configuration. - View Dependent Claims (21, 22, 23, 24, 25, 26, 28, 29, 30, 31, 32)
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33. A slideable cannula for delivering fluid to body tissue, comprising:
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an elongate tubular member having a proximal end, a distal end, and a lumen therebetween, the distal end having a preformed angled configuration relative to a proximal region, the angled region being bendable to a substantially linear configuration; a substantially rigid trocar having a proximal end, a distal end, a first lumen therebetween and communicating with a first port on the distal end of the trocar, and a second lumen extending distally from the proximal end and communicating with a second port on the distal end of the trocar, the second port adapted for cardioplegia infusion, the first lumen shaped to receive the elongate tubular member in its linear configuration, and the first port shaped to pass the elongate tubular member beyond the distal end of the trocar; and a balloon occluder mounted on the distal end of the trocar, the balloon occluder communicating with the proximal end of the trocar, wherein the tubular member is slideable through the lumen of the trocar, and wherein the tubular member regains its angled configuration when advanced distally beyond the distal end of the trocar. - View Dependent Claims (34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71)
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72. A method for cannulating a body tissue, comprising the steps of:
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providing a slidable cannula comprising an elongate member having a proximal end, a distal end, and a lumen therebetween, the distal end having a preformed angled configuration relative to the proximal region, the slidable cannula further comprising a trocar having a proximal end, a distal end, a first lumen therebetween, and a second lumen, the first lumen shaped to receive the elongate tubular member, the second lumen extending distally from the proximal end and communicating with a cardioplegia port, the trocar further comprising a balloon occluder mounted on the distal end of the trocar, the balloon occluder communicating with the proximal end of the trocar; inserting the elongate tubular member into the first lumen of the trocar, the trocar maintaining the tubular member in a substantially linear configuration; and advancing the distal end of the tubular member beyond the distal end of the trocar, wherein the distal end of the tubular member regains its preformed angle configuration. - View Dependent Claims (73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84)
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Specification