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Macro-Scale Tread Patterns for Traction in the Intestine.

Joseph C Norton, Jordan H Boyle, Ali Alazmani

IEEE Transactions on Bio-Medical Engineering

|March 24, 2020

Summary

Macro-scale tread patterns significantly enhance traction on colon tissue, crucial for medical devices. Optimizing tread design involves balancing increased grip with minimizing tissue trauma for safe clinical applications.

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Area of Science:

Biomedical Engineering
Tribology
Gastroenterology

Background:

Tread patterns are engineered to improve surface traction across various materials.
The colon's low-friction surface presents unique challenges for medical device interaction.
Understanding friction on intestinal tissue is vital for developing effective endoscopic tools.

Purpose of the Study:

To evaluate the effectiveness of macro-scale tread patterns in increasing traction on colon tissue.
To investigate the trade-off between traction enhancement and potential tissue trauma.
To inform the design of novel medical devices for gastrointestinal applications.

Main Methods:

A literature review was conducted to summarize existing knowledge.
Experiments utilized a custom test rig with ex vivo porcine colon.
Multiple macro-scale tread patterns were assessed for traction and trauma, with 16 repetitions for statistical robustness.

Main Results:

Macro-scale tread patterns significantly increased the static traction coefficient to 0.74 ± 0.22 and dynamic coefficient to 0.35 ± 0.04, compared to a smooth control.
Smaller tread features reduced trauma but also decreased the traction coefficient.
A clear compromise exists between maximizing traction and minimizing tissue damage.

Conclusions:

Macro-scale tread patterns offer a viable method for increasing traction on colon tissue.
Design choices for tread patterns must balance the need for high traction with the imperative to avoid tissue trauma.
This research provides foundational insights for developing functional tread surfaces in clinical settings.