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Surgical Endoscopy
Published in: Surgical Endoscopy 1/2017

01-01-2017 | New Technology

A novel retractable laparoscopic device for mapping gastrointestinal slow wave propagation patterns

Authors: Rachel Berry, Niranchan Paskaranandavadivel, Peng Du, Mark L. Trew, Gregory O’Grady, John A. Windsor, Leo K. Cheng

Published in: Surgical Endoscopy | Issue 1/2017

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Abstract

Background

Gastric slow waves regulate peristalsis, and gastric dysrhythmias have been implicated in functional motility disorders. To accurately define slow wave patterns, it is currently necessary to collect high-resolution serosal recordings during open surgery. We therefore developed a novel gastric slow wave mapping device for use during laparoscopic procedures.

Methods

The device consists of a retractable catheter constructed of a flexible nitinol core coated with Pebax. Once deployed through a 5-mm laparoscopic port, the spiral head is revealed with 32 electrodes at 5 mm intervals. Recordings were validated against a reference electrode array in pigs and tested in a human patient.

Results

Recordings from the device and a reference array in pigs were identical in frequency (2.6 cycles per minute; p = 0.91), and activation patterns and velocities were consistent (8.9 ± 0.2 vs 8.7 ± 0.1 mm s−1; p = 0.2). Device and reference amplitudes were comparable (1.3 ± 0.1 vs 1.4 ± 0.1 mV; p = 0.4), though the device signal-to-noise ratio was higher (17.5 ± 0.6 vs 12.8 ± 0.6 dB; P < 0.0001). In the human patient, corpus slow waves were recorded and mapped (frequency 2.7 ± 0.03 cycles per minute, amplitude 0.8 ± 0.4 mV, velocity 2.3 ± 0.9 mm s−1).

Conclusion

In conclusion, the novel laparoscopic device achieves high-quality serosal slow wave recordings. It can be used for laparoscopic diagnostic studies to document slow wave patterns in patients with gastric motility disorders.
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Metadata
Title
A novel retractable laparoscopic device for mapping gastrointestinal slow wave propagation patterns
Authors
Rachel Berry
Niranchan Paskaranandavadivel
Peng Du
Mark L. Trew
Gregory O’Grady
John A. Windsor
Leo K. Cheng
Publication date
01-01-2017
Publisher
Springer US
Published in
Surgical Endoscopy / Issue 1/2017
Print ISSN: 0930-2794
Electronic ISSN: 1432-2218
DOI
https://doi.org/10.1007/s00464-016-4936-4

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