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  • Title: Effects of hemostatic polysaccharide agent on epidural fibrosis formation after lumbar laminectomy in rats.
    Author: Tural Emon S, Somay H, Orakdogen M, Uslu S, Somay A.
    Journal: Spine J; 2016 Mar; 16(3):414-9. PubMed ID: 26582488.
    Abstract:
    BACKGROUND CONTEXT: Epidural fibrosis is a common adverse outcome of spinal surgery that can compress the dural sac and nerve root. Local hemostatic agents have many indications in numerous types of spinal surgery. As these agents may behave as foreign bodies, inducing inflammation and delaying regeneration, they could enhance the risk of epidural fibrosis. PURPOSE: We evaluated the effects of hemostatic polysaccharide on epidural fibrosis development in laminectomized rats. STUDY DESIGN: This is a randomized controlled trial. OUTCOME MEASURES: One month after surgery, tissues were histopathologically examined. Spinal tissue surrounding the laminectomy site was cut with a microtome and stained with hematoxylin and eosin and Masson trichrome. Slides were evaluated by a pathologist in a blinded fashion. The extent of epidural fibrosis, fibroblast cell density, cartilage, and bone regeneration was evaluated. METHODS: Rats were randomly assigned to receive sham surgery, laminectomy, or laminectomy with hemostatic polysaccharide (seven rats per group). Sham surgery that consisted of a skin incision was performed without laminectomy. Laminectomy was performed at the L1 and L2 vertebrae. In the experimental group, the polysaccharide hemostatic material, HaemoCer was placed in the laminectomy area. RESULTS: The proportion of rats with epidural fibrosis in laminectomized mice (both with and without hemostatic material) was higher than in sham-operated rats (p<.01). There was no difference in fibrosis between the two groups of laminectomized rats (p>.05). CONCLUSIONS: Our study indicates that hemostatic polysaccharide does not enhance epidural fibrosis following laminectomy in rodents, suggesting that absorbable polysaccharides may be appropriate for use in hemostasis during spinal surgery.
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