Development of a Sleeve Sensor for Measurement of Sphincter of Oddi Motility

A. G. Craig; T. Omari; T. Lingenfelser; A. C. Schloithe; G. T. P. Saccone; J. Dent; J. Toouli

doi:10.1055/s-2001-16211

Endoscopy, Table of Contents

Endoscopy 2001; 33(8): 651-657
DOI: 10.1055/s-2001-16211

Original Article

Development of a Sleeve Sensor for Measurement of Sphincter of Oddi Motility

A. G. Craig ¹ , T. Omari ² , T. Lingenfelser ³ , A. C. Schloithe ¹ , G. T. P. Saccone ¹ , J. Dent ⁴ , J. Toouli

¹ Dept. of General and Digestive Surgery, Flinders Medical Centre, Bedford Park, South Australia, Australia
² Centre for Paediatric and Adolescent Gastroenterology, Women's and Children's Hospital, North Adelaide, South Australia, Australia
³ Dept. of Gastroenterology and Oncology, St Franziskus Hospital, Muenster, Germany
⁴ Department of Gastrointestinal Medicine, Royal Adelaide Hospital, Adelaide, South Australia, Australia

Abstract

Background and Study Aims: Unavoidable catheter movement during sphincter of Oddi (SO) manometry can produce considerable variations in the basal pressure, due to movement of the recording sidehole. The sleeve sensor is a perfused channel which records the highest pressure point along its length. The aim of the study was to develop and evaluate a prototype sleeve sensor for SO manometry.

Materials and Methods: Bench-testing was used to assess the dynamic performance of the sleeve and sidehole assemblies. Recordings were initially made with a standard triple-lumen catheter and then with a purpose-built manometric assembly which had a 15 mm long sleeve sensor.

Results: A perfusion rate of 0.04 ml/min gave the best balance between baseline pressure offset and rise rate. Recordings were attempted in nine patients and successfully achieved in four. The sleeve and sidehole recordings of the maximal basal pressure did not differ significantly (mean ± SEM, 86.1 ± 26.5 mmHg vs. 90.1 ± 21.0 mmHg, P = 0.57, r = 0.998).

Conclusions: Unnecessarily high perfusion rates are being used for SO manometry. The sleeve sensor has the potential to monitor SO pressure more reliably than the currently used perfused sidehole method and should enhance the safety of prolonged SO manometry.

Full Text

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A. G. Craig, M.D.

Dept. of General and Digestive Surgery
Flinders Medical Centre

Bedford Park, South Australia
Australia 5042

Fax: + 61-8-82045966

Email: sandy.craig@flinders.edu.au