title: Mechanical loading of the low back during cardiopulmonary resuscitation.
abstract: OBJECTIVE
  Back pain is often seen in professional rescuers after carrying out resuscitation. Back loading is known to be affected by the working surface height, but the relationship between the surface height and back loading during cardiopulmonary resuscitation (CPR) is poorly understood. The purpose of this study was to examine how back loading changes in response to CPR posture and surface height.
  
  
  METHODS
  Twenty-two experienced professional rescuers performed CPR using three surface heights; the floor (F), a table at a height of 63cm (HT) and one at a height of 37cm (LT).
  
  
  RESULTS
  The mean and maximal low back moment and compression force at HT were significantly smaller than those at LT and F.
  
  
  CONCLUSIONS
  The results suggest that the HT task of chest compression produces the lowest low back moment and compression force. Thus, HT positioning may decrease the probability of low back pain and is suggested to be optimal height for inexperienced resuscitators, those with back injury, or those requiring a long operating duration.
authors.affiliation: Institute of Biomedical Engineering, National Cheng Kung University, 1 University Road, Tainan 701, Taiwan.
authors.forename: Jui-Yi
authors.initials: JY
authors.lastname: Tsou
authors.forename: Chih-Hsien
authors.initials: CH
authors.lastname: Chi
authors.forename: Rebekah Min-Fang
authors.initials: RM
authors.lastname: Hsu
authors.forename: Hui-Fen
authors.initials: HF
authors.lastname: Wu
authors.forename: Fong-Chin
authors.initials: FC
authors.lastname: Su
mesh_terms: D000328:Adult; D001696:Biomechanical Phenomena; D016887:Cardiopulmonary Resuscitation / Q000379:methods; D005260:Female; D006282:Health Personnel; D006801:Humans; D017116:Low Back Pain / Q000209:etiology* / Q000503:physiopathology; D008297:Male; D009784:Occupational Diseases / Q000209:etiology* / Q000503:physiopathology; D011312:Pressure