title: [Risk factors of post-renal biopsy bleeding].
abstract: OBJECTIVE
  To evaluate the risk factors of post-renal biopsy bleeding (PBB).
  
  
  METHODS
  We retrospectively analyzed the clinical data of 1 262 patients who received ultrasound-guided biopsy of native kidney at our hospital from January 2005 to December 2006.
  
  
  RESULTS
  The overall incidence of PBB was 30.3% (383/1,262), among which the incidence of hematoma was 29.4% (371/1,262) (the percentages of less and more than 5cm were 73.9% and 26.1%, respectively) while that of gross hematuria was only 1.3% (17/1,262). The incidences of minor, intermediate, and major bleeding complications were 21.4% (270/1,262), 8.4% (106/1,262), and 0.6% (7/1,262), respectively. In seven patients with major bleeding complications, six had renal disease secondary to rheumatic disease (lupus nephritis, n = 5; scleroderma crisis, n = 1), while the other one had IgA nephropathy (Lee's classification V). The risk of PBB was relatively higher in women and younger patients.
  
  
  CONCLUSIONS
  Patients with chronic connective tissue diseases are vulnerable to severe PBB complications. A close monitoring of these patients is necessary.
authors.affiliation: Department of Nephrology, PUMC Hospital, CAMS and PUMC, Beijing 100730, China.
authors.forename: Jian-Ling
authors.initials: JL
authors.lastname: Tao
authors.forename: Hang
authors.initials: H
authors.lastname: Li
authors.forename: Chao
authors.initials: C
authors.lastname: Li
authors.forename: Xin-Wei
authors.initials: XW
authors.lastname: Xu
authors.forename: Ji-Fang
authors.initials: JF
authors.lastname: Li
authors.forename: Na
authors.initials: N
authors.lastname: Yi
authors.forename: Dong-Yan
authors.initials: DY
authors.lastname: Liu
authors.forename: Yan
authors.initials: Y
authors.lastname: Qin
authors.forename: Jian-Fang
authors.initials: JF
authors.lastname: Cai
authors.forename: Bing-Yan
authors.initials: BY
authors.lastname: Liu
authors.forename: Hong
authors.initials: H
authors.lastname: Xu
authors.forename: Rui-Tong
authors.initials: RT
authors.lastname: Gao
authors.forename: Wen-Ling
authors.initials: WL
authors.lastname: Ye
authors.forename: Wei
authors.initials: W
authors.lastname: Ye
authors.forename: Xue-Mei
authors.initials: XM
authors.lastname: Li
authors.forename: Xue-Wang
authors.initials: XW
authors.lastname: Li
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D001706:Biopsy / Q000009:adverse effects*; D005260:Female; D006801:Humans; D007668:Kidney / Q000000981:diagnostic imaging / Q000473:pathology* / Q000601:surgery*; D008297:Male; D008875:Middle Aged; D019106:Postoperative Hemorrhage / Q000209:etiology*; D012189:Retrospective Studies; D012307:Risk Factors; D014463:Ultrasonography; D055815:Young Adult