Experimental evaluation of photocrosslinkable chitosan hydrogel as injection solution for endoscopic resection
| Autor: | T. Ishizuka, Yoshihiro Tanaka, Satoshi Aiko, S. Nakamura, Satoko Kishimoto, Hidemi Hattori, Masayuki Ishihara, Takuya Horio, Tadaaki Maehara, Yashiro Nogami, Yasuhiro Kanatani |
|---|---|
| Rok vydání: | 2009 |
| Předmět: |
Male
medicine.medical_specialty Swine medicine.medical_treatment Perforation (oil well) Biocompatible Materials Sodium Chloride Injections Chitosan chemistry.chemical_compound medicine Animals Endoscopic resection Intestinal Mucosa Saline Wound Healing business.industry Dissection Biocompatibility Testing Gastroenterology Endoscopy Hydrogels Injection solution Surgery Hypertonic saline Cross-Linking Reagents Treatment Outcome chemistry Models Animal Feasibility Studies business Wound healing |
| Zdroj: | Endoscopy. 41:25-28 |
| ISSN: | 1438-8812 0013-726X |
| DOI: | 10.1055/s-0028-1103483 |
| Popis: | BACKGROUND AND STUDY AIMS: Saline as an injection solution for endoscopic resection techniques has several disadvantages such as a short-lasting effect leading to a potentially higher risk of bleeding and perforation. The new substance of photocrosslinkable chitosan hydrogel in a DMEM/F12 medium (PCH) can be converted into an insoluble hydrogel by ultraviolet irradiation for 30 s, and was evaluated in two sets of animal experiments. METHODS: 18 pigs were used in the two parts of the study. First, mucosal resections were done with either PCH or hypertonic saline; the effects of both agents on wound healing were examined endoscopically and histologically. Second, in vivo degradation of PCH was examined using six pig stomachs. RESULT: PCH injection led to a longer-lasting elevation with clearer margins, compared with hypertonic saline, thus enabling precise endoscopic submucosal dissection (ESD) along the margins of the elevated mucosa. The endoscopic appearance after ESD was similar in both groups. PCH biodegradation was completed within 8 weeks according to endoscopic and histologic analyses. CONCLUSION: PCH is a promising agent for submucosal injection prior to various techniques of endoresection. It should be evaluated in clinical trials after biocompatibility testing for PCH is completed. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|