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Colloidal crystals array enabled bionic biliary stent for efficient domestic biofluid management.

Sengwang Fu1, Jianping Zhu2, Zhijun Jiang3

  • 1Department of Gastroenterology, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China.

Colloids and Surfaces. B, Biointerfaces
|December 1, 2023
PubMed
Summary

A novel Janus wettability stent coating enables unidirectional biofluid drainage, preventing wound wetting. This integrated system also allows for in situ biofluid collection and disease diagnosis via metal ion detection.

Keywords:
Biofluid managementBionicColloidal crystalsSensing array

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Area of Science:

  • Biomaterials Science
  • Surgical Innovation
  • Wound Management

Background:

  • Effective biofluid management is critical during in vivo surgical interventions to control bleeding and remove excess fluids like bile and wound exudate.
  • Current solutions, including self-sealing needles and hydrogels, face limitations, particularly regarding intestinal mucosal injury and secondary damage.
  • Surface wettability of biliary stents is crucial, but conventional coatings can adhere to wound tissue, hindering proper biofluid management.

Purpose of the Study:

  • To develop a multifunctional stent coating capable of effectively removing excessive biofluid and preventing wound wetting.
  • To create a Janus wettability coating that facilitates unidirectional biofluid drainage.
  • To explore an integrated system for in situ biofluid collection and disease diagnosis.

Main Methods:

  • Development of an interpenetrating Janus wettability stent coating with distinct hydrophobic and hydrophilic sides.
  • Demonstration of unidirectional biofluid movement using the developed stent coating.
  • Utilizing a self-pumping dressing in an infected tissue model to showcase directional biofluid movement and metal ion detection.

Main Results:

  • The Janus wettability coating successfully enabled unidirectional draining of excessive biofluid, preventing it from wetting the wound.
  • Directional biofluid movement was demonstrated in an infected tissue model using a self-pumping dressing.
  • The system showed potential for in situ biofluid collection and disease diagnosis through metal ion change detection.

Conclusions:

  • The developed interpenetrating Janus wettability stent coating offers an effective solution for managing biofluids during surgery.
  • The integrated system provides a novel approach for wound dressings with enhanced biofluid management and diagnostic capabilities.
  • This technology presents an opportunity for improved patient outcomes through better wound care and early disease detection.