Enhancing Mucus Flow and Clearance by Grafting Zwitterionic Hydrogel Films to Luminal Surfaces

Area of Science:

• Biomaterials Science
• Polymer Chemistry
• Medical Device Engineering

Background:

• Medical devices often face complications due to mucus accumulation.
• Developing surfaces that resist mucus adhesion is crucial for improving device performance and patient outcomes.

Purpose of the Study:

• To evaluate the efficacy of zwitterionic hydrogel films in modifying mucus properties on medical polymer surfaces.
• To assess the impact of these films on mucus contact angles, flow dynamics, and mucus plugging in both flat and tubular configurations.

Main Methods:

• Zwitterionic hydrogel thin films were photografted onto medical rubber surfaces.
• These surfaces were compared against non-zwitterionic hydrogel films and untreated controls.
• Mucus contact angles, flow on sheets and tubes, and mucus plugging were measured.

Main Results:

• Both zwitterionic and conventional hydrogel films significantly reduced mucus contact angles and the tilt angle required for mucus flow initiation.
• Preliminary data indicated that these films could accelerate the unplugging of mucus-clogged tubes.
• The positive effects on mucus flow were more pronounced in larger diameter tubes (>2.6 mm).

Conclusions:

• Zwitterionic and conventional hydrogel films effectively reduce mucus flow resistance and enhance mucus discharge on medical surfaces.
• These hydrogel coatings show potential for improving the design of medical tubes, particularly those involved in ventilation and mucus clearance.
• The findings suggest a pathway to fewer patient complications associated with mucus-related device failures.