title: Motorised resection device for transurethral resection of the prostate: a laboratory evaluation.
abstract: Transurethral resection of the prostate is the most common method of relieving urinary outflow obstruction secondary to prostatic enlargement. However, this procedure can be responsible for various complications, including irrigant-fluid absorption and blood loss, both of which are strongly dependent on operation duration time. To reduce the latter, a new resection device has been designed for transurethral prostatectomy. The device basically consists of a rotating cutting loop controlled externally, with three degrees of freedom, to fit the adenoma shape. Its performance is assessed in vitro by drilling conical and semi-ellipsoidal cavities in agar gel models. The mean difference between the calculated and obtained cavity volumes is 3% (SD = 0.9%). The volume cutting rate, found to be independent of the type of cavity drilled, is equal to 2.9 +/- 0.3 cm3 min-1. The advantages of this motorised resection device prototype are reduction in operation duration and accuracy of the resected volume. In vivo resection of a 20 cm3 adenoma in less than 15 min can be expected.
authors.affiliation: Institut National de la Santé et de la Recherche Médicale, U. 281, Lyon, France. u281@lyon151.inserm.fr
authors.forename: J L
authors.initials: JL
authors.lastname: Mestas
authors.forename: D
authors.initials: D
authors.lastname: Cathignol
authors.forename: F
authors.initials: F
authors.lastname: Chavrier
authors.forename: M
authors.initials: M
authors.lastname: Devonec
mesh_terms: D000362:Agar; D005069:Evaluation Studies as Topic; D006801:Humans; D008297:Male; D008954:Models, Biological; D011468:Prostatectomy / Q000295:instrumentation*; D011470:Prostatic Hyperplasia / Q000601:surgery*; D018084:Ultrasonography, Interventional
chemical_list: D000362:Agar