title: Comparing the Success Rate of Radial Artery Cannulation under Ultrasound Guidance and Palpation Technique in Adults.
abstract: BACKGROUND
  Previous studies have shown ultrasound guidance (USG)for arterial cannulation being advantageous compared to palpation technique, but little is known about its performance by novices.
  
  
  OBJECTIVE
  This study was to compare the utility of USG radial artery cannulation with palpation technique in terms of success rate, real-time to placement, number of attempts and complications.
  
  
  METHODS
  After IRB approval, a randomized prospective study was performed November 2009-October 2010. Ten third-year residents, having performed USG vascular catheterization as yet less than 3 times, were coached on the pork-phantom during a workshop for real time ultrasound-guided vascular access. For the study patients were randomized to US-guided technique (US-group) and palpation (P-group); ten patients for each resident.
  
  
  RESULTS
  One hundred adult patients undergoing neurosurgery were enrolled. There were no statistically significant differences between US-group vs. P-group in success rate (78% vs. 82%; p = 0.62), time to success (60 (12.8, 547.0) vs. 52 (6.9, 639.0) sec; p = 0.22), and number of attempts (1 (1, 4) vs. 1 (1, 3); p = 0.79). Most common complication was puncture hematoma (US-group 26% vs. P-group 24%; p = 0.82). Success was defined as no change in catheterization site, performer and technique.
  
  
  CONCLUSIONS
  Regarding success rate, attended time, or number of attempts for radial arterial cannulation, we did not find any benefit of ultrasound guidance compared to palpation technique. Our findings were not in accordance to other trials. However, we have to consider operators in our study being in experienced in ultrasound-guided procedures but not in palpation techniques.
authors: Suwimon
authors: S
authors: Tangwiwat
authors: Walaiporn
authors: W
authors: Pankla
authors: Pranee
authors: P
authors: Rushatamukayanunt
authors: Pichaya
authors: P
authors: Waitayawinyu
authors: Trisana
authors: T
authors: Soontrakom
authors: Anchala
authors: A
authors: Jirakulsawat
mesh_terms: D000328:Adult; D000368:Aged; D002406:Catheterization, Peripheral / Q000379:methods*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D019635:Neurosurgical Procedures; D010173:Palpation / Q000379:methods*; D011446:Prospective Studies; D017534:Radial Artery; D018084:Ultrasonography, Interventional / Q000379:methods*