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[Shape memory alloy spiral for urethrostenosis caused by benign prostatic hyperplasia]
1251 Hospital, People's Liberation Army, Zhangjiakou.
Summary
Nitinol (shape memory alloy, SMA) spirals show promise for treating benign prostatic hyperplasia (BPH). This study found successful implantation and tissue integration in 39 patients, with a high success rate and no device complications.
Area of Science:
- Biomaterials Science
- Urology
- Medical Devices
Background:
- Benign prostatic hyperplasia (BPH) is a common condition affecting aging men.
- Current treatments for BPH have limitations, including side effects and invasiveness.
Purpose of the Study:
- To evaluate the efficacy and safety of nitinol (shape memory alloy, SMA) spirals for treating BPH.
- To assess the biocompatibility and tissue integration of nitinol spirals in the prostatic urethra.
Main Methods:
- Nitinol spirals were implanted in the prostatic urethra of 39 BPH patients using a coaxial sheath.
- Tissue integration was assessed via immunohistochemical staining.
- Patients were followed for 3-26 months for device performance and complications.
Main Results:
- Successful implantation was achieved in 89.7% of patients.
- Prostatic urethra epithelium embedded the spiral within 6 months, with new transitional epithelium originating from the native urethra.
- No incrustation or migration of the nitinol spirals was observed during follow-up.
Conclusions:
- Nitinol (SMA) spirals are a safe and effective treatment option for BPH.
- The material's super-elasticity, corrosion resistance, and biocompatibility contribute to successful outcomes.
- Nitinol spirals demonstrate excellent tissue integration and long-term stability in the prostatic urethra.