A New Biodegradable Braided Self-Expandable PLGA Prostatic Stent: An Experimental Study in the Rabbit
| Autor: | Joonas Mikkonen, Hanne Juuti, Minna Kellomäki, Andres Kotsar, Martti Talja, Pertti Törmälä, Paula M. Martikainen, Teuvo L.J. Tammela, Taina Isotalo |
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| Rok vydání: | 2008 |
| Předmět: |
Male
medicine.medical_specialty Urology medicine.medical_treatment Biocompatible Materials Prosthesis Design Epithelium chemistry.chemical_compound Polylactic Acid-Polyglycolic Acid Copolymer Urethra Prostate Absorbable Implants Materials Testing medicine Animals Prostatic stent Lactic Acid cardiovascular diseases medicine.diagnostic_test Urinary retention business.industry Stent Cystoscopy equipment and supplies Surgery PLGA medicine.anatomical_structure chemistry Models Animal Stents Prostate surgery Rabbits medicine.symptom business Polyglycolic Acid |
| Zdroj: | Journal of Endourology. 22:1065-1070 |
| ISSN: | 1557-900X 0892-7790 |
| Popis: | The biodegradable PLGA (a copolymer of L-lactide and glycolide) urethral stent with a spiral configuration has been used clinically for the prevention of postoperative urinary retention after different types of thermal therapy for benign prostatic hyperplasia. A new braiding pattern for this stent has recently been developed by our group. The aim here was to investigate the in situ degradation and biocompatibility of the new braided stent in the rabbit urethra.PLGA stents with a one-over-one braiding pattern and steel stents served as controls that were inserted into the posterior urethras of 24 male rabbits using a special delivery instrument. The animals were sacrificed after 1 week, 1 month, 2 months, or 4 months, and light microscopy and histologic analyses were performed.The delivery instrument worked well and cystoscopy was not needed in the insertion process. The braided PLGA stents degraded smoothly in 1 to 2 months. The metallic stents induced more epithelial hyperplasia and epithelial changes than the biodegradable stents at all time points analyzed. These differences increased during follow-up.The degradation process was well controlled and the biodegradable stents were more biocompatible than the metallic stents. The new stent can be inserted into the posterior urethra without cystoscopic aid. |
| Databáze: | OpenAIRE |
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