Hydrogel device for analgesic drugs with in-situ loading and polymerization

Area of Science:

• Biomaterials Science
• Drug Delivery Systems
• Orthopaedic Surgery

Background:

• High prevalence of opioid addiction necessitates alternative pain management strategies.
• Local drug delivery offers a promising approach to reduce systemic opioid use.
• Orthopaedic applications require effective and safe pain management solutions.

Purpose of the Study:

• To explore an in-situ polymerizable hydrogel for local delivery of analgesics and NSAIDs.
• To evaluate the potential of this hydrogel system for orthopaedic pain management.
• To reduce the need for systemic opioids in pain management.

Main Methods:

• Synthesized methacrylated oligomeric polyethylene glycol-co-lactic acid polymers using microwave radiation.
• Incorporated bupivacaine hydrochloride (analgesic) and ketorolac tromethamine (NSAID).
• Assessed in vitro drug elution, gel degradation, and osteoblast biocompatibility; performed in vivo histological analysis and pharmacokinetic modeling.

Main Results:

• Characterized drug elution and gel degradation profiles in vitro.
• Demonstrated biocompatibility with osteoblasts in vitro and via subcutaneous implantation in vivo.
• Estimated intra-articular and systemic drug concentrations and pharmacokinetic parameters.

Conclusions:

• In-situ applicable hydrogels show potential for extending local pain medication efficacy.
• This hydrogel system may significantly reduce the reliance on opioid-based pain management.
• The developed hydrogel is a promising tool for localized pain relief in orthopaedic applications.