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Method for measuring esophageal sphincter compliance

a technology of esophageal sphincter and compliance, which is applied in the field of medical devices, can solve the problems of insufficient simple measurement of les pressure, and achieve the effect of removing muscle tension and ton

Inactive Publication Date: 2005-02-03
SHAKER REZA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0016] Thus, the present invention provides a means for measuring in vivos the compliance of a relaxed LES. The pressure within the bag at various stages of inflation can be measured to establish a relation between volume and pressure. Predisposing the LES in a relaxed state removes the tension and tone of the muscle and allows the LES to distend without restriction from the muscle. This allows the compliance of the LES to be measured irrespective of muscle tone. Ultimately, this provides for a more effective means to diagnose certain esophageal dysfunctions.

Problems solved by technology

Simply measuring the pressure exerted by the LES is insufficient because it is possible for a dysfunctional LES to have proper pressure values due to the tone of the LES muscle, despite having abnormal compliance.

Method used

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  • Method for measuring esophageal sphincter compliance
  • Method for measuring esophageal sphincter compliance
  • Method for measuring esophageal sphincter compliance

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Embodiment Construction

[0024] Referring to the drawings in detail, the LES compliance measurement apparatus of the present invention is referred to generally by numeral 10. A series of embodiments of the apparatus 10 are illustrated in FIGS. 1-6 which includes a sphincter compliance measurement catheter 12, such as a compliance balloon catheter, that comprises a length of tubing 22 having a first or distal end 26 and a second or proximal end 25. Disposed along the length of tubing 22 are a first extendable member 28, such as an inflatable balloon, with the first extendable member 28 being configured to expand and contact the walls of the esophagus, and a second extendable member 30, such as a non-elastic balloon or bag, that is placed in an intrasphincteric position for measuring the compliance of the LES. While the extendable members 28,30 of the illustrative embodiments are depicted as inflatable balloons, one skilled the art could appreciate that other expanding members, such as baskets or similar stru...

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Abstract

An apparatus and method are disclosed for measuring the compliance of the lower esophageal sphincter (LES), the apparatus comprises a catheter having a plurality of extendable members disposed therealong for both measuring the compliance of the LES and stimulating the esophagus which relaxes the LES to obtain a more clinically relevant measurement of LES compliance. In one embodiment, the plurality of extendable members include a first balloon which is located and inflated within the esophagus to trigger esophageal motility, a second, non-elastic balloon that is positioned within the LES, and a third balloon which is inflated within the stomach to help align the second balloon with LES. Incrementally increasing volumes of air are introduced into the second balloon, with the resulting pressures exerted by the LES calculated and compared to normative values to assess the condition of the LES.

Description

RELATED APPLICATION INFORMATION [0001] This is a divisional application of application Ser. No. 09 / 818,181, filed Mar. 27, 2001. This application also claims priority from U.S. Provisional Application Ser. No. 60 / 192,172 filed Mar. 27, 2000.TECHNICAL FIELD [0002] The present invention relates to medical devices and more particularly to a method and apparatus for measuring the compliance or distensibility of the lower esophageal sphincter (LES) for use in the diagnosis of esophageal function. BACKGROUND OF THE INVENTION [0003] It is well known in the art to use esophageal and nasogastric catheters having balloon cuffs to measure the pressure within the esophagus. These devices have been used by and large to study the condition of the lungs and the blood pressure in and around the heart. For these purposes, it is desirous to measure pressure acting on the walls of the esophagus. Accordingly, an elastic balloon cuff, coupled to a suitable pressure transducer via a catheter, is inflated...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): A61B5/03A61B5/00A61B10/00A61B17/12A61F2/958
CPCA61B5/037A61M25/1011A61B5/4233A61B5/03
Inventor SHAKER, REZA
Owner SHAKER REZA
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