Developing a multifunctional chitosan composite sponge for managing traumatic injuries.

Area of Science:

• Biomaterials Science
• Nanotechnology
• Materials Chemistry

Background:

• Developing effective hemostatic agents is crucial for managing bleeding, as conventional methods present limitations like infection risk and suboptimal efficacy.
• Current hemostatic techniques often struggle with severe bleeding cases, necessitating innovative solutions.

Purpose of the Study:

• To introduce a novel multifunctional nanocomposite sponge for enhanced hemostasis.
• To evaluate the hemostatic, biocompatible, and antibacterial properties of the developed sponge.

Main Methods:

• Fabrication of a nanocomposite sponge incorporating chitosan (CS), cellulose (Cel), graphene oxide (GO), and silver (Ag) nanoparticles.
• Assessment of physical properties including swelling rate, absorption rate, and mechanical strength.
• In vitro evaluation of cytocompatibility, hemolysis, blood cell adherence, and antibacterial activity.
• In vivo testing in rat models (tail amputation, liver injury, femoral artery laceration) to assess hemostatic efficacy.

Main Results:

• The CS/Cel/GO/Ag sponge exhibited high swelling (>3000%) and absorption (>2100%) rates with significant mechanical strength (>20 kPa).
• In vitro studies confirmed excellent cytocompatibility, non-hemolytic nature, effective blood cell adherence, and potent bacterial inhibition.
• In vivo tests demonstrated substantial improvements in hemostasis, significantly reducing clotting times and blood loss compared to conventional methods across multiple injury models.

Conclusions:

• The CS/Cel/GO/Ag nanocomposite sponge presents a promising multifunctional material for acute bleeding management.
• Its superior hemostatic performance, biocompatibility, and antibacterial properties suggest significant potential in trauma care.