[Experience with the memotherm stent in high-risk urinary retention patients].
OBJECTIVE
We report on our experience with the Memotherm stent implanted in high-risk patients who had an indwelling catheter.


METHODS
Seventeen patients (mean age 80.6 years, range 55 to 93) who had an indwelling catheter were treated by placement of the Memotherm stent. The mean duration time of indwelling catheter were 12.7 months (range 1 to 60). The methods of implantation was used the special delivery system and treatment can be done with the patient under local anesthesia with non-steroidal anti-inflammatory drug. To assess the efficacy of the treatment we measured urinary peak flow rate (ml/sec), residual urine volume (ml) and residual urine rate (residual urine volume/total urine volume: %). Subjective symptoms were evaluated using the International Prostate Symptom Score (I-PSS). The mean follow-up time was 3.3 months (range 1 week to 8 months).


RESULTS
There were no severe medical problems associated with stent placement. Sixteen patients were able to void immediately after insertion of the stent. The remaining 1 required an indwelling catheter to 2 months, however, eventually able to void. Only 7 of the 17 patients can be evaluation for urinary flow and residual urine, nevertheless the mean urinary peak flow rate showed 9.7 ml/sec, the mean residual urine volume was 77.4 ml, and the mean residual urine rate was 27.5%. Also, average I-PSS showed 13.4 in these patients.


CONCLUSIONS
As a results of this study, the Memotherm stent is good conservative therapy for high-risk urinary retention patients.
Maru
Norio
N
Department of Urology, Kitasato University School of Medicine.
Shitara
Toshiya
T
Yamashita
Hideyuki
H
Minei
Sadanori
S
Shimura
Satoru
S
Hamashima
Toshinori
T
Baba
Shiro
S
D000368:Aged; D000369:Aged, 80 and over; D002408:Catheters, Indwelling; D006801:Humans; D008297:Male; D008875:Middle Aged; D012306:Risk; D015607:Stents; D014521:Urethra; D014546:Urinary Catheterization; D016055:Urinary Retention / Q000503:physiopathology / Q000628:therapy*; D014563:Urodynamics