title: Urodynamic pattern distribution among aged male patients with lower urinary tract symptoms suggestive of bladder outlet obstruction.
abstract: OBJECTIVE
  To develop a urodynamic study (UDS) pattern system for aged male patients who complained of non-neurogenic lower urinary tract symptoms (LUTS) to create a reference guideline for their diagnosis and treatment by a retrospective analysis.
  
  
  METHODS
  A retrospective analysis of UDS data was carried out in 1984 male patients neurologically intact with symptoms suggestive of bladder outlet obstruction (BOO) aged older than 45 years (2002-2013). On the basis of their UDS characteristic findings, the patients were classified into 1 of 7 subgroups: equivocal or mild BOO with sphincter synergia with or without idiopathic detrusor overactivity (pattern A); equivocal or mild BOO with idiopathic sphincter overactivity (B); classic BOO with sphincter synergia (C) or overactivity (D); BOO with only detrusor low compliance (E); BOO with both detrusor underactivity and low compliance (F); and equivocal BOO with detrusor underactivity (G). The follow-up data were reviewed and analyzed thereafter.
  
  
  RESULTS
  The feasibility and rationality of this system were confirmed. The distribution of 7 patterns (pattern, case number, %) was A 158, 8%; B 59, 3%; C 1059, 53.3%; D 277, 14%; E 120, 6%; F 93, 4.7%; and G 218, 11%. A-G numbers in pattern C, D, and E were 103.1-141.4, higher than other patterns (P <.001), and functional pressure lengths of pattern C and D were 7.0-7.2 cm, longer than other patterns (P <.001).
  
  
  CONCLUSIONS
  A practical UDS pattern system for aged male patients with lower urinary tract symptoms suggestive of BOO was constructed, which can be used to optimize the diagnosis and treatment of these patients.
authors.affiliation: Department of Urology, Changzheng Hospital, Second Military Medical University, Shanghai, China.
authors.forename: Danfeng
authors.initials: D
authors.lastname: Xu
authors.affiliation: Department of Urology, Changzheng Hospital, Second Military Medical University, Shanghai, China.
authors.forename: Xingang
authors.initials: X
authors.lastname: Cui
authors.affiliation: Department of Urology, Changzheng Hospital, Second Military Medical University, Shanghai, China. Electronic address: qu_cy@sohu.com.
authors.forename: Chuangyu
authors.initials: C
authors.lastname: Qu
authors.affiliation: Department of Urology, Changzheng Hospital, Second Military Medical University, Shanghai, China. Electronic address: yin2022@hotmail.com.
authors.forename: Lei
authors.initials: L
authors.lastname: Yin
authors.affiliation: Department of Urology, Changzheng Hospital, Second Military Medical University, Shanghai, China.
authors.forename: Cunzhou
authors.initials: C
authors.lastname: Wang
authors.affiliation: Department of Urology, Changzheng Hospital, Second Military Medical University, Shanghai, China.
authors.forename: Jie
authors.initials: J
authors.lastname: Chen
mesh_terms: D000368:Aged; D006801:Humans; D059411:Lower Urinary Tract Symptoms / Q000145:classification* / Q000209:etiology / Q000503:physiopathology*; D008297:Male; D008875:Middle Aged; D012189:Retrospective Studies; D012720:Severity of Illness Index; D001748:Urinary Bladder Neck Obstruction / Q000150:complications / Q000503:physiopathology*; D053201:Urinary Bladder, Overactive / Q000150:complications / Q000503:physiopathology; D014563:Urodynamics