Does vancomycin powder topically apply to the peripheral nerve cause perineural fibrosis?

Abstract

Purpose: The aim of this experimental rat study is to investigate whether vancomycin powder directly and topically applied on the sciatic nerve causes perineural fibrosis and chronic inflammation development. Materials and Methods: Thirty young adult male Wistar-Albino rats were included in the study and divided into 3 groups of 10 rats based on the dose to be applied after intraperitoneal anesthesia. After the sciatic nerve exploration, 10 rats (group 1) were administered a single dose of vancomycin powder, 10 rats (group 2) were administered a double dose of vancomycin, and control group was created with 10 animals which were administered no medication (group 3). After 3 weeks, rats were sacrificed, tissue samples were taken around sciatic nerve and sent for histopathological examination. Results: Grade 1 perineural fibrosis was detected in 1 animal (10%) in group 1. Grade 2 perineural fibrosis was detected in 1 animal (10%) and grade 1 perineural fibrosis was detected in 1 of 10 animals (10%) in group 2. In Group 3, grade 1 perineural fibrosis was detected in 1 experimental animal (10%). Chronic inflammation was not detected in any experimental animal. No significant difference was found between the 3 groups in terms of perineural fibrosis (p=0.753). Conclusion: In this experimental animal study, we found that fibrosis development did not differ significantly among the groups. We believe that more objective results can be obtained as a result of experimental studies with larger participation and more detailed histopathological examinations.

Keywords

• perineural fibrosis;
• sciatic nerve
• vancomycin powder

Periferik sinir üzerinde topikal uygulanan vancomisin toz perinöral fibrozise neden olur mu?

Abstract

Amaç : Bu deneysel sıçan çalışmasının amacı direk olarak siyatik sinir üzerine topikal uygulanan vancomisin tozun perinöral fibrozis ve kronik inflamasyon gelişimine neden olup olmadığını araştırmaktır. Materyal-metod : Otuz adet erkek Wistar-Albino cins sıçan çalışmaya dahil edilerek intraperitoneal anestezi sonrası uygulanacak doz miktarına göre 10’arlı 3 gruba ayrıldı. Siyatik sinir ekplorasyonu ardından tek doz vankomisin toz verilen 10 sıçan (grup 1), çift doz vankomisin uygulanan 10 sıçan (grup 2) , 10 hayvana ise ilaç verilmeyerek kontrol grubu (grup 3) oluşturuldu. 3 hafta sonra ise sıçanlar sakrifiye edilerek siyatik sinir etrafındaki doku örnekleri alındı ve histopatolojik incelemeye gönderildi. Bulgular : Grup 1 de 1 (%10) hayvanda evre 1 perinöral fibrosis tespit edildi. Diğer 9 (%90) deney hayvanında epidural fibrozis görülmedi. Grup 2 deki 10 deney hayvanından 1 tanesinde (%10) evre 2, 1 tanesinde ise (%10) evre 1 perinöral fibrozis saptandı. Sekiz hayvanda (%80) ise perinöral fibrozis bulgusu saptanmadı. Grup 3 de ise 1 (%10) deney hayvanında evre 1 perinöral fibrozis saptandı. Kronik inflamasyon ise hiçbir deney hayvanında tespit edilmedi. İstatistiksel incelemeler sonucunda 3 grup arasında perinöral fibrozis açısından anlamlı farklılık saptanmadı (p=0.753). Sonuç : Bu deneysel hayvan çalışmasında vankomisin toz uygulanan hastalarda fibrozis gelişiminin gruplar arasında anlamlı farklılık göstermediğini saptadık. Daha büyük katılımlı ve histopatolojik incelemelerin daha detaylı yapılacağı deneysel çalışmalar sonucunda daha objektif sonuçlara varılacağı kanaatindeyiz

Keywords

• perinöral fibrozis
• siyatik sinir
• vankomisin toz

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