title: Comparison of the heart and breathing rate of acutely ill medical patients recorded by nursing staff with those measured over 5 min by a piezoelectric belt and ECG monitor at the time of admission to hospital.
abstract: BACKGROUND
  Heart and breathing rates are predictors of disease severity and of a poor outcome. However, few reports have compared their machine measurements with traditional manual methods.
  
  
  METHODS
  A small rural Irish hospital.
  
  
  METHODS
  The heart and breathing rates of 377 acutely ill medical patients (mean age 68.3 SD 16.8 years) recorded by nursing staff at the time of admission to hospital was compared with those measured over 5 min by a piezoelectric belt and ECG monitor (the BT16 acquisition system).
  
  
  RESULTS
  The mean breathing rate measured by the nursing staff (20.9 SD 4.8 breaths per min) and that measured by the BT16 piezoelectric belt (19.9 SD 4.5 breaths per min) were significantly different (p 0.004), as were the nurse and BT16 measured heart rates (85.4 SD 21.3 vs. 81.2 SD 18.7, p 0.004), and the correlation coefficient between the two methods of breathing and heart rate measurement were low. Nurse measured breathing rate measurements were clustered around rates of 18, 20 and 22 breaths per min. Unlike those obtained by nurses, BT16 measured heart and breathing rates were shown by logistic regression to be independent predictors of in-hospital mortality.
  
  
  CONCLUSIONS
  There is a poor correlation between breathing and heart rates measured by traditional methods and those obtained by the BT16 device. BT16 derived breathing and heart rates, but not those measured manually, were independent predictors of in-hospital mortality.
authors.affiliation: Department of Medicine, Nenagh Hospital, Nenagh, Tipperary, Ireland. jgkellett@eircom.net
authors.forename: John
authors.initials: J
authors.lastname: Kellett
authors.forename: Min
authors.initials: M
authors.lastname: Li
authors.forename: Shahzeb
authors.initials: S
authors.lastname: Rasool
authors.forename: Geoffrey C
authors.initials: GC
authors.lastname: Green
authors.forename: Andrew
authors.initials: A
authors.lastname: Seely
mesh_terms: D000208:Acute Disease; D000368:Aged; D004562:Electrocardiography; D006339:Heart Rate; D006801:Humans; D008991:Monitoring, Physiologic / Q000295:instrumentation / Q000451:nursing; D009733:Nursing Diagnosis; D009741:Nursing Staff, Hospital; D010343:Patient Admission; D056152:Respiratory Rate; D013997:Time Factors