title: Radioanatomical measurements of the medullary cavity of the humerus in Kuwait: ethnic differences and clinical implications for fracture fixation.
abstract: OBJECTIVE
  To compare the difference in diameter of the medullary cavity of the humerus in Arab and South Asian patients in Kuwait.
  
  
  METHODS
  In 46 patients (29 Arab, 17 South Asian) treated at Al-Razi Hospital, Kuwait, for diaphyseal fracture of the humerus, the medullary cavity of the humerus on the radiographs of the uninjured (contralateral side) was examined. Bone density was also measured. Statistical significance was calculated by parametric and nonparametric test using SPSS package.
  
  
  RESULTS
  South Asians had a significantly narrower medullary cavity (p < 0.05) and higher cortical indices (p < 0.05) than Arabs, and also a narrower external diameter of the humerus at levels 5 and 6 (p < 0.05).
  
  
  CONCLUSIONS
  In cases of fracture of the humerus, radiographic measurements of the diameter of the medullary cavity of the uninjured side were essential in selecting the appropriate fixation device.
authors.affiliation: Department of Orthopedics, Al-Razi Orthopedic Hospital, PO Box 4235, 13043 Safat, Kuwait. pospulawieslaw@hotmail.com
authors.forename: Wieslaw
authors.initials: W
authors.lastname: Pospula
authors.forename: Tarek
authors.initials: T
authors.lastname: Abu Al Noor
authors.forename: Tarek
authors.initials: T
authors.lastname: Roshdy
authors.forename: Ahmad
authors.initials: A
authors.lastname: Al Rowaih
mesh_terms: D000328:Adult; D000368:Aged; D018912:Arabs; D044466:Asian People; D005260:Female; D005592:Fracture Fixation / Q000379:methods*; D006801:Humans; D006810:Humeral Fractures / Q000000981:diagnostic imaging* / Q000208:ethnology / Q000601:surgery*; D006811:Humerus / Q000000981:diagnostic imaging* / Q000601:surgery*; D007730:Kuwait / Q000453:epidemiology; D008297:Male; D008875:Middle Aged; D011859:Radiography