Method for retrieving pancreatic juice utilizing and endoscopically wire-guided catheter
First Claim
1. A method for positioning a double lumen gastroduodenal tube into a patient to diagnose chronic pancreatitis, comprising the steps of:
- (a) passing a distal end of an endoscope from an external body access site to a predetermined location of an duodenum;
(b) passing a guide-wire through said endoscope to position a distal end of said guide-wire proximate to said distal end of said endoscope;
(c) withdrawing said endoscope from the patient;
(d) passing a double lumen gastroduodenal tube over said guide-wire to position a distal end of said tube proximate to said distal end of said guide-wire such that ports of a first lumen are located in stomach and ports of a second lumen in said predetermined location of said duodenum; and
(e) withdrawing said guide-wire from the patient.
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Accused Products
Abstract
A method for accurately and quickly positioning a double lumen gastroduodenal tube into predetermined locations utilizing an endoscopically placed guide wire to retrieve duodenal fluid uncontaminated by gastric fluid, with little or no discomfort to the patient, and minimal radiation exposure. Specifically, an endoscope is passed through a patent'"'"'s esophagus and stomach into the duodenum such that its distal end is located at a predetermined location, such as the fourth portion of the duodenum. While the endoscope is held in place, a guide-wire is passed through its center instrument channel to position a distal end of the guide-wire adjacent to the distal end of the endoscope. The endoscope is then withdrawn from the patient, leaving the guide-wire. A double lumen gastroduodenal tube is then threaded over the guide-wire such that gastric ports are aligned with the stomach and duodenal ports are aligned with the fourth portion of the duodenum so that upon aspiration of the gastric ports, the gastric fluid is prevented from entering the duodenum and contaminating the duodenal fluid.
112 Citations
20 Claims
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1. A method for positioning a double lumen gastroduodenal tube into a patient to diagnose chronic pancreatitis, comprising the steps of:
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(a) passing a distal end of an endoscope from an external body access site to a predetermined location of an duodenum; (b) passing a guide-wire through said endoscope to position a distal end of said guide-wire proximate to said distal end of said endoscope; (c) withdrawing said endoscope from the patient; (d) passing a double lumen gastroduodenal tube over said guide-wire to position a distal end of said tube proximate to said distal end of said guide-wire such that ports of a first lumen are located in stomach and ports of a second lumen in said predetermined location of said duodenum; and (e) withdrawing said guide-wire from the patient. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for obtaining duodenal fluid for use in diagnosing chronic pancreatitis of a patient, comprising the steps of:
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(a) passing a distal end of an endoscope through the patient'"'"'s esophagus and stomach to a predetermined location of an duodenum; (b) passing a guide-wire through said endoscope to position a distal end of said guide-wire proximate to said distal end of said endoscope; (c) withdrawing said endoscope from the patient; (d) passing a double lumen gastroduodenal tube over said guide-wire to position a distal end of said tube proximate to said distal end of said guide-wire such that gastric ports of a first lumen are positioned in stomach and duodenal ports of a second lumen are positioned in said predetermined location of said duodenum; (e) withdrawing said guide-wire from the patient; (f) continuously aspirating gastric fluid from said gastric ports; and (g) periodically aspirating duodenal fluid from said duodenal ports. - View Dependent Claims (12, 13, 14, 15, 16)
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17. A method for obtaining duodenal fluid for use in diagnosing chronic pancreatitis of a patient, comprising the steps of:
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(a) passing a distal end of an endoscope through the patient'"'"'s esophagus and stomach to a predetermined location of an duodenum;
(b) passing a guide-wire through said endoscope to position a distal end of said guide-wire proximate to said distal end of said endoscope;(c) withdrawing said endoscope from the patient; (d) passing a gastroduodenal tube over said guide-wire to position a distal end of said tube proximate to said distal end of said guide-wire such that duodenal ports of said tube are positioned in said predetermined location of said duodenum; (e) passing a tube having a balloon at its distal end over said gastroduodenal tube to position said balloon at a location between said stomach and an entry point at which the pancreatic juice enter said duodenum; (f) inflating said balloon to prevent gastric fluids from entering said predetermined location of said duodenum; (g) withdrawing said guide-wire from the patient; and (h) periodically aspirating duodenal fluid from said duodenal ports. - View Dependent Claims (18, 19, 20)
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Specification