title: A statistical model that predicts the length from the left subclavian artery to the celiac axis; towards accurate intra aortic balloon sizing.
abstract: BACKGROUND
  Ideally the length of the Intraaortic balloon membrane (22-27.5 cm) should match to the distance from the left subclavian artery (LSA) to the celiac axis (CA), (LSA - CA). By being able to estimate this distance, better guidance regarding IABP sizing could be recommended.
  
  
  METHODS
  Internal aortic lengths and demographic values were collected from a series of 40 cadavers during autopsy. External somatometric measurements were also obtained.There were 23 males and 17 females. The mean age was 73.1+/-13.11 years, weight 56.75+/-12.51 kg and the height 166+/-9.81 cm.
  
  
  RESULTS
  Multiple regression analysis revealed the following predictor variables (R2 > 0.70) for estimating the length from LSA to CA: height (standardized coefficient (SRC) = 0.37, p = 0.004), age (SRC = 0.35, p < 0.001), sex (SRC = 0.21, p = 0.088) and the distance from the jugular notch to trans-pyloric plane (SRC = 0.61, p < 0.001).
  
  
  CONCLUSIONS
  If LSA-CA < 21.9 cm use 34 cc IABP & if LSA-CA > 26.3 cm use 50 cc IABP. However if LSA-CA = 21.9- 26.3 cm use 40 cc, but be aware that it could be "aortic length-balloon membrane length" mismatching.
  
  
  CONCLUSIONS
  Routinely, IABP size selection is being dictated by the patient's height. Inevitably, this leads to pitfalls. We reported a mathematical model of accurate intraaortic balloon sizing, which is easy to be applied and has a high predictive value.
authors.affiliation: Department of Cardiothoracic Surgery, Royal Victoria Hospital, Belfast, BT12 6BA, UK & Northern Ireland. hparissis@yahoo.co.uk
authors.forename: Haralabos
authors.initials: H
authors.lastname: Parissis
authors.forename: Alan
authors.initials: A
authors.lastname: Soo
authors.forename: Michalis
authors.initials: M
authors.lastname: Leotsinidis
authors.forename: Dimitrios
authors.initials: D
authors.lastname: Dougenis
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D001011:Aorta / Q000601:surgery*; D001837:Body Weights and Measures; D002102:Cadaver; D002445:Celiac Artery; D005260:Female; D006801:Humans; D007423:Intra-Aortic Balloon Pumping / Q000295:instrumentation*; D008297:Male; D008875:Middle Aged; D015233:Models, Statistical; D010865:Pilot Projects; D011237:Predictive Value of Tests; D012044:Regression Analysis; D013348:Subclavian Artery