Abstract：
OBJECTIVES:Intracavernous needle injection is an effective delivery method for pharmacotherapy of erectile dysfunction. Needle phobia, pain, and concern about local tissue injury have stimulated the search for new, less invasive means of inducing penile erection. In this preliminary communication, we evaluate a jet injector as an alternative to needle injection for intracavernous delivery of vasoactive drugs. METHODS:Jet injection was evaluated in three groups of rats receiving either India ink, saline, or papaverine into the penis. The ability of the jet injection to penetrate through the tunica albuginea and deliver liquid to the corpora cavernosa smooth muscle was assessed by the degree of staining within the corpus cavernosum (ink group), histologic change (saline group), and rise in intracavernous pressure (papaverine group). Erectile capacity following cavernous nerve electric stimulation was compared before and 1 hour after injection of saline or papaverine. RESULTS:Ink traversed the skin and tunica albuginea with extensive deposition noted within the cavernous spaces. Varying degree of subcutaneous hemorrhage were seen with saline jet injection; however, the corpus cavernous smooth muscles showed no evidence of injury. Jet injection of papaverine 3250 micrograms significantly increased cavernous pressure (39.4 +/- 4.6 cm H2O) compared with saline injection (2.8 +/- 1.3 cm H2O). CONCLUSIONS:We conclude that acute jet injection is an effective method for intracavernous delivery of drugs. Long-term effects should be evaluated prior to clinical use.
journal_name
Urologyjournal_title
Urologyauthors
Seyam RM,Bégin LR,Tu LM,Dion SB,Merlin SL,Brock GBdoi
10.1016/S0090-4295(97)00541-4subject
Has Abstractpub_date
1997-12-01 00:00:00pages
994-8issue
6eissn
0090-4295issn
1527-9995pii
S0090-4295(97)00541-4journal_volume
50pub_type
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