title: Ultrasound evaluation of effect of different degree of wrist extension on radial artery dimension at the wrist joint.
abstract: BACKGROUND
  Successful arterial cannulation requires wide and patent arterial lumen. A recent study has shown that success rate of radial arterial cannulation at first attempt is more at 45° angle of wrist extension in both young and elderly patients. No study has reasoned whether these high success rates at 45° is because of less compression of the radial artery at this particular angle of wrist extension. Hence, we attempted to study whether the radial artery dimensions changes with increasing angles of wrist extension in young, healthy female volunteers using ultrasound examination.
  
  
  OBJECTIVE
  To investigate the effect of increasing angle of wrist extension of 0, 15, 30, 45, 60, and 75° on radial artery dimensions at the level of the wrist joint using ultrasound examination.
  
  
  METHODS
  A prospective single blinded study in volunteers.
  
  
  METHODS
  Sonographic measurements of radial artery dimension at the wrist level were performed in 48 young, healthy female subjects. Height (anteroposterior in mm), width (mediolateral in mm) and depth (skin to artery) were measured at wrist extension of 0, 15, 30, 45, 60, and 75°. The dimensions at each angle are compared with 0° as the control and statistical analysis done.
  
  
  METHODS
  One-way analysis of variance test.
  
  
  RESULTS
  No statistically significant change in dimension of the radial artery is observed with increasing angle of wrist extension.
  
  
  CONCLUSIONS
  Ultrasound evaluation showed that increasing angle of wrist extension does not significantly change the dimensions of radial artery at the wrist joint level in young healthy female volunteers.
authors.affiliation: Department of Anesthesiology, Critical Care and Pain Medicine, Sri Ramachandra Medical College and Research Institute, Porur, Chennai, Tamil Nadu, India.
authors.forename: Venkatesh
authors.initials: V
authors.lastname: Selvaraj
authors.forename: Faiza Sulaiman
authors.initials: FS
authors.lastname: Buhari
mesh_terms: D002406:Catheterization, Peripheral / Q000379:methods; D005260:Female; D006801:Humans; D009068:Movement; D011446:Prospective Studies; D017534:Radial Artery / Q000000981:diagnostic imaging*; D018615:Ultrasonography, Doppler, Color; D014953:Wrist / Q000098:blood supply* / Q000000981:diagnostic imaging*; D014955:Wrist Joint / Q000098:blood supply* / Q000000981:diagnostic imaging*; D055815:Young Adult