Bilal Mahmood Bhandari, Hajra Shuja, Syed Mehmood Ali, Sadaf Bokhari, Liaqat Ali.
To compare the frequency of first attempt successful ultrasound guided radial artery cannulation by modified short axis out-of-plane technique versus conventional long axis in-plane technique.
Professional Med J Jan ;30(10):1235-40.

Objective: To compare the frequency of first attempt successful ultrasound guided radial artery cannulation by modified short axis out-of-plane technique versus conventional long axis in-plane technique. Study Design: Quasi Experimental Study Setting: Jinnah Hospital, Lahore. Study Period: 1st January 2019 to 30th June 2019. Material & Methods: 180 patients fulfilling the selection criteria were divided in two groups using lottery method. Group modified SA-OOP (short axis out-of-plane) and group LA-IP (long axis in-plane). Modified Allen test was performed in all patients, if positive, procedure was carried out. In modified short axis out of plane approach, a suture was tied on the midpoint of ultrasound probe and perpendicular to the long axis as a guide and then radial artery was viewed by placing US probe on the wrist of patient transversely. The needle was inserted at 30?-45? angle into the skin. In long Axis In- Plane approach, radial artery was first viewed by placing US probe transversely on the wrist of patient and then probe was rotated to 90? in clockwise direction to see the artery in longitudinal plane. Then cannula was inserted at 30?-45? angle into the skin. Success of first attempt was recorded. Results: The age range was 18-70 years. Mean age of the patients was 46.69 +- 17.35 and 43.68 +- 17.99 years in group LA-IP and SA-OOP, respectively (4). In group LA-IP, 57 patients (63.3%) were male and in group SA-OOP 45 patients (50%) were male while 33 patients (36.7%) of group LA-IP and 45 patients (50%) of group SA-OOP were female. Frequency of first attempt was 64.4% (58 patients) in group LA-IP and in group SA-OOP frequency of first attempt was 53.3% (48 patients). Statistically significant difference was not seen between two groups as p-value is 0.172. Conclusion: There is no difference in frequency of first attempt success in modified short axis out-of-plane ultrasound versus conventional long axis in-plane ultrasound to guide radial artery cannulation.

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