Apparatus for determining a location in a body using a catheter and method of using such catheter
First Claim
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1. A method of using an esophageal catheter, having a lumen, comprising the steps of:
- determining an esophageal location in a patient having an esophagus, comprising the steps of;
passing a distal end of said catheter through an esophagus and a lower esophageal sphincter into a stomach of a patient;
introducing a flow of gas having a constant pressure to a proximate end of said lumen of said esophageal catheter;
measuring a lumen pressure of said gas in said lumen;
pulling back said distal end of said catheter from said patient;
noting an increase in said lumen pressure;
noting a subsequent decrease in said lumen pressure;
identifying an upper boundary of said lower esophageal sphincter based upon said decrease; and
establishing said esophageal location relative to said upper boundary of said lower esophageal sphincter; and
anchoring a capsule to said esophagus with said catheter.
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Abstract
Method of using an esophageal catheter. A distal end of the catheter is passed through the esophagus into the stomach of a patient. A constant pressure of gas is applied to the catheter. The back pressure of the gas is measured. The distal end of the catheter is pulled from the patient. An increase in the pressure measured is noted. A subsequent decrease in the pressure measured is then noted. The upper boundary of the lower esophageal sphincter is identified as a function of such decrease. The catheter is then used to place a remote monitoring device to the esophagus.
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Citations
18 Claims
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1. A method of using an esophageal catheter, having a lumen, comprising the steps of:
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determining an esophageal location in a patient having an esophagus, comprising the steps of; passing a distal end of said catheter through an esophagus and a lower esophageal sphincter into a stomach of a patient; introducing a flow of gas having a constant pressure to a proximate end of said lumen of said esophageal catheter; measuring a lumen pressure of said gas in said lumen; pulling back said distal end of said catheter from said patient; noting an increase in said lumen pressure; noting a subsequent decrease in said lumen pressure; identifying an upper boundary of said lower esophageal sphincter based upon said decrease; and establishing said esophageal location relative to said upper boundary of said lower esophageal sphincter; and anchoring a capsule to said esophagus with said catheter. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method of using a catheter having a lumen, comprising the steps of:
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determining an esophageal location in a patient having an esophagus, comprising the steps of; passing a distal end of said catheter through a first chamber and a restriction into a second chamber of a patient; introducing an air flow having a constant pressure to a proximate end of said lumen; measuring a lumen pressure in said lumen; determining a baseline for said lumen pressure; pulling back said distal end of said catheter from said patient; noting an increase in said lumen pressure; noting a subsequent decrease in said lumen pressure; identifying an upper boundary of said restriction upon said decrease; and establishing said esophageal location relative to said upper boundary of said lower esophageal sphincter; and anchoring a capsule to said esophagus with said catheter. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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Specification