title: [Clinical analysis of obvious and hidden blood loss in inter-trochanter fracture patients treated with proximal femoral nail anti-rotation and dynamic hip screw].
abstract: OBJECTIVE
  To analyze the obvious and hidden blood loss before and after operations in the inter-trochanter fracture patients treated with proximal  femoral nail anti-rotation (PFNA) and dynamic hip screw (DHS) to provide the data support for clinical perioperative period treatment.
  
  
  METHODS
  The  clinical data of 216 cases of inter-trochanter fracture patients treated with PFNA and 168 cases of inter-trochanter fracture patients treated with DHS  from Dec. 30, 2001 to Sep. 30, 2010, and the obvious, hidden blood loss and blood transfusion before and after operations were retrospectively analyzed,  using SPSS 13.0 statistical package.
  
  
  RESULTS
  The PFNA group: The mean blood loss of (48.9±2.8) mL was found in 216 cases of inter-trochanter  fracture patients during operation. The mean obvious blood loss was (62.3±3.8) mL while the hidden blood loss was (385.0±6.2) mL. The DHS group: The  mean blood loss of (124.9±7.8) mL was found in 168 cases during operation. The mean obvious blood loss was (73.9±4.7) mL and the hidden blood loss  was (243.4±6.3) mL after operation. The blood loss during operation and obvious blood loss after operation of DHS was larger than that of PFNA, while  the hidden blood loss of DHS was smaller than that of PFNA. The gross total blood loss and the hidden blood loss of group PFNA was bigger than that of  DHS group.
  
  
  CONCLUSIONS
  There were much hidden blood loss in both PFNA and DHS group for inter-trochanter fracture internal fixation after operation.  This reminds surgeons to monitor the life vital signs after PFNA or DHS internal fixation operation in order to decrease the complication.
authors.affiliation: Department of Trauma and Orthopaedics, Peking University People's Hospital, Beijing, China. zhangpeixun@126.com
authors.forename: Pei-xun
authors.initials: PX
authors.lastname: Zhang
authors.forename: Feng
authors.initials: F
authors.lastname: Xue
authors.forename: Shuai
authors.initials: S
authors.lastname: An
authors.forename: Hang-yu
authors.initials: HY
authors.lastname: Gu
authors.forename: Hao
authors.initials: H
authors.lastname: Lu
authors.forename: Xiao-dong
authors.initials: XD
authors.lastname: Xu
authors.forename: Zhong-guo
authors.initials: ZG
authors.lastname: Fu
authors.forename: Dian-ying
authors.initials: DY
authors.lastname: Zhang
authors.forename: Bao-guo
authors.initials: BG
authors.lastname: Jiang
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D016063:Blood Loss, Surgical / Q000706:statistics & numerical data*; D001810:Blood Volume; D001858:Bone Nails; D001863:Bone Screws; D005260:Female; D005593:Fracture Fixation, Internal / Q000009:adverse effects* / Q000295:instrumentation / Q000379:methods; D006620:Hip Fractures / Q000601:surgery*; D006801:Humans; D008297:Male; D011183:Postoperative Complications