A bioinspired switchable adhesive patch with adhesion and suction mechanisms for laparoscopic surgeries.

Area of Science:

• Biomaterials Science
• Surgical Innovation
• Adhesive Technology

Background:

• Medical adhesives are crucial in clinical settings, offering flexibility and ease of use.
• Current limitations exist, particularly in laparoscopic surgery, highlighting a need for effective liver retraction methods with minimal tissue damage.

Purpose of the Study:

• To develop a bioinspired adhesive patch mimicking octopus suction cups for enhanced surgical applications.
• To create a device with excellent mechanical properties, controllable adhesion, and biocompatibility for liver retraction in laparoscopic surgery.

Main Methods:

• Fabrication of an adhesive patch combining poly(acrylic acid) with N-hydroxysuccinimide ester, crosslinked gelatin methacrylate, and gelatin.
• Incorporation of a temperature-sensitive microgel layer (poly(N-isopropylacrylamide-co-2-hydroxyethyl methacrylate)) for tunable pressure reduction.
• Evaluation through mechanical testing, adhesion assessment, and biocompatibility analysis.

Main Results:

• The bioinspired adhesive patch demonstrated strong tissue adhesion and robust mechanical properties.
• The temperature-sensitive layer effectively created a reduced pressure cavity, mimicking suction.
• Biocompatibility analysis confirmed the material's safety for medical applications.

Conclusions:

• The developed bioinspired adhesive patch offers a promising alternative to traditional retraction methods in laparoscopic surgery.
• Its unique design provides effective liver retraction with minimal invasiveness, addressing a critical need in clinical medicine.
• This innovative medical adhesive holds potential for broader applications in minimally invasive procedures.