Gastric pseudocyst drainage and stent delivery system for use therein
First Claim
1. A method of draining a pseudocyst present within a patient, said method comprising the steps of:
- (a) providing a stent, said stent being transformable from a non-expanded state of comparatively lesser diameter to an expanded state of comparatively greater diameter, said stent having a first end and a second end;
(b) delivering said stent in said non-expanded state to a pseudocyst located within a patient;
(c) inserting said first end of said stent into the pseudocyst; and
(d) transforming said stent from said non-expanded state to said expanded state;
(e) whereby the pseudocyst drains through said stent.
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Accused Products
Abstract
Method for draining pseudocysts and stent delivery system for use therein. In one embodiment, the system comprises an inner catheter provided with a pair of longitudinal lumens. A guide wire is slidably disposed in one lumen, and a retractable needle is slidably disposed in the other lumen. A self-expandable stent is coaxially mounted around the inner catheter near its distal end, and an outer catheter is coaxially mounted around the inner catheter and the stent, the outer catheter being adapted for axial movement relative to the inner catheter and being dimensioned to maintain the stent in a compressed state. In use, an endoscope is intraorally introduced into a patient'"'"'s stomach, and the distal end of the system is inserted therethrough. The needle is advanced to form perforations in the stomach and pseudocyst. The inner catheter is then inserted through the perforations, and the outer catheter is retracted, allowing the stent to expand and interconnect the stomach and pseudocyst. The endoscope and the rest of the delivery system are then withdrawn from the patient.
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Citations
46 Claims
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1. A method of draining a pseudocyst present within a patient, said method comprising the steps of:
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(a) providing a stent, said stent being transformable from a non-expanded state of comparatively lesser diameter to an expanded state of comparatively greater diameter, said stent having a first end and a second end;
(b) delivering said stent in said non-expanded state to a pseudocyst located within a patient;
(c) inserting said first end of said stent into the pseudocyst; and
(d) transforming said stent from said non-expanded state to said expanded state;
(e) whereby the pseudocyst drains through said stent. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A method of draining a pseudocyst present within a patient, said method comprising the steps of:
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(a) providing a double pigtail stent, said double pigtail stent having a first end and a second end, each of said first and second ends being transformable from a straightened state, when constrained, to a curled state, when relaxed;
(b) coaxially mounting said double pigtail stent over the distal end of a catheter, whereby each of said first and second ends is in said straightened state;
(c) endoscopically introducing said double pigtail stent and the distal end of said catheter through the mouth and into the stomach of a patient in the vicinity of a pseudocyst;
(d) sliding said first end of said double pigtail stent off the distal end of said catheter, through the stomach and into the pseudocyst, whereby said first end is transformed from said straightened state to said curled state; and
(e) sliding said second end of said double pigtail stent off the distal end of said catheter into the stomach, whereby said second end is transformed from said straightened state to said curled state;
(f) whereby the pseudocyst drains through said stent into the stomach. - View Dependent Claims (21, 22, 23)
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24. A stent delivery system comprising:
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(a) an inner catheter, said inner catheter being provided with a first longitudinally extending lumen;
(b) perforating means slidably disposed in said first longitudinally extending lumen;
(c) an outer catheter, said outer catheter surrounding at least a portion of the length of said inner catheter and adapted for axial movement relative to said inner catheter; and
(d) a self-expandable stent, said self-expandable stent disposed between said inner catheter and said outer catheter;
(e) wherein said outer catheter is dimensioned to maintain said self-expandable stent in a compressed state. - View Dependent Claims (25, 26, 27, 28, 29, 30, 31, 32, 33, 34)
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35. A stent delivery system comprising:
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(a) a catheter, said catheter having a proximal end, a distal end, a first lumen extending longitudinally through said distal end and a second lumen extending longitudinally and having a proximal end connected to a gas line and a distal end terminating in a balloon section;
(b) perforating means slidably disposed in said first lumen; and
(c) a balloon-expandable stent coaxially mounted over said balloon section of said catheter. - View Dependent Claims (36, 37, 38, 39, 40)
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41. A stent delivery system comprising:
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(a) a catheter, said catheter having a proximal end, a distal end, a first lumen extending longitudinally through said distal end, and a second lumen extending longitudinally and having a proximal end connected to a gas line and a distal end terminating in a balloon section;
(b) perforating means slidably disposed in said first lumen; and
(c) a first pigtail stent coaxially and slidably mounted over said catheter proximal to said balloon section. - View Dependent Claims (42, 43, 44, 45, 46)
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Specification