title: Comparison of a needle-free high-pressure injection system with needle-tipped injection of intracavernosal alprostadil for erectile dysfunction.
abstract: Patients identified from hospital records as using alprostadil injections for erectile dysfunction were invited to take part in this open crossover study. On alternate weeks eight patients were given intracavernosal needle injections and transdermal needle-free injection of alprostadil in a randomized order. Efficacy of injection and associated pain were assessed and compared for the two methods. Pain produced during injection was significantly greater with the needle-free system than with the needle-tipped injection whilst efficacy was significantly less. Bruising was reported in all except one patient following needle-free injection only. Patient ratings of the needle-free injector were significantly lower than ratings for needle-tipped alprostadil delivery and when asked to express a preference, every patient chose the needle-tipped injection over the needle-free device.
authors.affiliation: The Pain Management Centre, University College London Hospitals NHS Trust, London, UK. louise.harding@uclh.org
authors.forename: L M
authors.initials: LM
authors.lastname: Harding
authors.forename: A
authors.initials: A
authors.lastname: Adeniyi
authors.forename: R
authors.initials: R
authors.lastname: Everson
authors.forename: S
authors.initials: S
authors.lastname: Barker
authors.forename: D J
authors.initials: DJ
authors.lastname: Ralph
authors.forename: A P
authors.initials: AP
authors.lastname: Baranowski
mesh_terms: D000328:Adult; D000368:Aged; D000527:Alprostadil / Q000008:administration & dosage*; D003288:Contusions / Q000209:etiology; D018592:Cross-Over Studies; D007172:Erectile Dysfunction / Q000188:drug therapy*; D006801:Humans; D007267:Injections / Q000009:adverse effects; D007277:Injections, Jet / Q000009:adverse effects; D008297:Male; D008875:Middle Aged; D010146:Pain / Q000209:etiology / Q000503:physiopathology; D017060:Patient Satisfaction; D010413:Penis; D014665:Vasodilator Agents / Q000008:administration & dosage*
chemical_list: D014665:Vasodilator Agents; D000527:Alprostadil