Hemostatic Efficacy and Safety of Oxidized Regenerated Cellulose Hemostatic Material in a Multi-organ Bleeding Porcine Model
This study demonstrates that the domestically produced oxidized regenerated cellulose (StypCel™) exhibits hemostatic efficacy and safety profiles comparable to the imported Surgicel® Fibrillar™ across liver, gastric, and mesenteric bleeding models in minipigs, supporting its use as an effective alternative.
Original paper licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). This is an AI-generated explanation of the paper below. It is not written or endorsed by the authors. For technical accuracy, refer to the original paper. Read full disclaimer
Imagine you are a surgeon in the middle of a high-stakes operation. Suddenly, a patient starts bleeding from a deep cut in their liver, stomach, or the delicate tissues holding their intestines together. In this chaotic moment, time is the most precious resource. Traditional methods like tying off vessels or using heat can be tricky in tight spaces or on soft, squishy organs. This is where "hemostatic materials" come in—special bandages designed to act like emergency stop signs for blood. Think of them as super-absorbent sponges that don't just soak up the mess but actively trick the body's own clotting system into working overtime, forming a plug to seal the leak. One of the most famous types of these bandages is made from "oxidized regenerated cellulose" (ORC). It's a fancy way of saying it's a gauze made from processed plant fibers that has been chemically tweaked to be sticky for blood cells. For years, a specific imported brand has been the gold standard in operating rooms worldwide. But recently, a new, locally made version has entered the market. The big question isn't just if the new one works, but if it works just as well as the famous one, without causing any nasty side effects later on.
This study dives right into that question by turning a group of sixteen mini-pigs into the ultimate test subjects. Why pigs? Because their insides are surprisingly similar to ours, making them perfect for practicing surgery before trying it on humans. The researchers set up a "multi-organ bleeding challenge," creating controlled cuts in the pigs' livers, stomach walls, and the mesentery (the web-like tissue that holds the intestines). They then applied either the famous imported ORC bandage (Surgicel® Fibrillar™) or the new domestic version (StypCel™) to see which one could stop the bleeding faster and cleaner.
The results were a tale of two very similar bandages with one tiny, microscopic difference. Under a powerful microscope, the new StypCel™ bandage looked like a super-fine, dense net made of tiny threads (about 9.82 micrometers wide), while the famous competitor looked a bit more like a loosely woven net with thicker threads (about 20.59 micrometers wide). You might think the finer net would be a superhero, but when it came to the actual job of stopping the bleeding, they were neck-and-neck. In the liver, stomach, and mesentery models, both bandages took almost the exact same amount of time to stop the bleeding—roughly 220 seconds for the liver, 145 seconds for the stomach, and 100 seconds for the mesentery. The amount of blood lost during the procedure was also statistically identical between the two groups. Whether it was the liver or the stomach, the new bandage didn't lose a single point against the old champion.
But stopping the bleeding is only half the battle; the bandage also has to play nice with the body afterward. The researchers checked the pigs' blood work, liver function, and kidney health over four weeks to see if the materials caused any internal trouble. The answer was a resounding "no trouble here." Both bandages broke down and disappeared from the body at the same pace. By the first week, the body had already started digesting most of the material, and by the fourth week, the bandages were essentially gone, leaving behind only happy, healthy tissue with no signs of lingering inflammation or scarring. The body's cleanup crew (macrophages) had eaten up the remnants of both bandages equally well.
The study concludes that the new StypCel™ bandage is a perfect twin to the famous imported one. It stops bleeding just as fast, loses just as little blood, and disappears just as cleanly. While the new bandage has slightly finer fibers, this didn't translate to a faster stop-time in these tests, but it did prove that the new material is a safe, effective, and reliable alternative for surgeons. It's a win for having more choices in the operating room, ensuring that when a patient needs a "blood-stopping superhero," they have a backup that performs just as heroically as the original.
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