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Ultrex cylinders: problems with uncontrolled lengthening (the S-shaped deformity)
S K Wilson1, M A Cleves, J R Delk
1Southwest Impotence Center, University of Arkansas for Medical Sciences, Van Buren, USA.
The Journal of Urology
|January 1, 1996
Summary
The AMS Ultrex cylinder did not promote penile lengthening and frequently caused an S-shaped deformity, requiring device replacement in 32% of patients. Avoid prolonged inflation and consider downsizing for future implants.
Area of Science:
- Urology
- Biomedical Engineering
Background:
- The AMS Ultrex cylinder was designed for penile lengthening with controlled girth expansion.
- Its potential as a tissue expander for penile lengthening was investigated.
Purpose of the Study:
- To determine if the AMS Ultrex cylinder functions as a tissue expander to achieve penile lengthening.
- To assess the occurrence of S-shaped deformity following AMS Ultrex implantation.
Main Methods:
- Fifty-nine AMS Ultrex prostheses were implanted between December 1990 and January 1992.
- Cylinder length was based on intracorporeal measurements.
- Statistical analysis was performed on lengthening results and S-shaped deformity incidence.
Main Results:
- No significant penile lengthening was observed.
- An S-shaped deformity occurred in 19 patients (32%), necessitating cylinder replacement.
Conclusions:
- AMS Ultrex cylinders should be downsized.
- Prolonged inflation should be avoided.
- The device is not recommended for Peyronie's disease or as a replacement for other penile implant types.