New Injectable Bioadhesive Offers Sutureless Gastric Perforation Repair

Top Summary

• What happened: Scientists developed an injectable, acid-tolerant bioadhesive (OSSA hydrogel) for sutureless repair of large gastric perforations.
• Why it matters: This groundbreaking hydrogel offers a potentially superior alternative to sutures and existing sealants for treating digestive diseases.
• What changes for people: The OSSA hydrogel promises minimally invasive treatment options and reduced post-operative complications.
• Who is affected: Patients with gastric perforations and other digestive injuries stand to benefit from this new technology.

A Novel Bioadhesive Emerges

Researchers have announced a novel injectable bioadhesive, composed of FDA-approved components, designed for sutureless repair of significant gastric perforations.

The groundbreaking OSSA hydrogel, utilizing Octa-PEG-NH2 and Octa-PEG-SSA, holds considerable promise for the clinical management of digestive ailments.

Superior Adhesion and Strength

Effective wound healing in gastric perforation cases hinges on adhesion to wet surfaces due to the harsh gastric environment.

In tests, the OSSA hydrogel sealed a 4 mm hole on a porcine colon, exhibiting burst pressure far exceeding commercially available treatments like Coseal, Fibrin glue, and Histoacryl.

The adhesive demonstrated resilience, withstanding significant motion and resisting breakage except under violent puncture and peeling.

Sealing Larger Perforations

Researchers successfully deposited the OSSA hydrogel in situ on a larger, approximately 10 mm incision on a porcine stomach.

The stomach, filled with over 5 kg of water, showed no fluid leakage, highlighting the hydrogel's robust physical properties and adhesive strength.

Ultrafast Gelation and Long-Lasting Adhesion

In another experiment, a 20 mm incision was created in an isolated porcine stomach.

The in situ injection of the blue dye-stained adhesive resulted in ultrafast gelation, instant adhesion, fluid-tight capacity, and minimal glue leakage.

The adhesive remained firm for over 72 hours, even when the porcine stomach was submerged in putrid water. In human gastric juices, the adhesion to damaged tissues remained robust for more than 2 weeks.

OSSA Hydrogel vs. Surgical Suture

Researchers compared OSSA, Coseal, and Histoacryl sealants, alongside surgical suture.

The sealants were easily delivered and adhered quickly, whereas surgical suture took more than 15 minutes. All treatments prevented observable leakages of gastric contents.

However, the OSSA bioadhesive achieved superior repair efficacy compared with the clinical suture. It also exhibited significantly lower levels of abdominal adhesions at repair sites and in surrounding tissues.

A Potential New Treatment Option

The OSSA hydrogel signifies a potential treatment option in gastrointestinal repair and postoperative adhesion prevention.

 

It enabled strong adhesion in fluidically, chemically, and mechanically dynamic gastric environments.

 

Despite its early developmental stage, the bioadhesive provides a promising clinical therapeutic opportunity for both large gastric perforation and other digestive injuries via minimally invasive techniques.

What to Watch Next

Further clinical trials will be crucial to validate the OSSA hydrogel's efficacy and safety in human patients. Researchers are likely to seek regulatory approvals to bring this novel bioadhesive to market, potentially transforming the treatment landscape for gastric perforations.