Document Classification

Section Type: RESULTS

Text: The echogenic polymer-coated needle had the highest mean score + / - SD for visualization of both the shaft (3. 4 + / - 0. 90) and tip (3. 5 + / - 0. 87) compared with the untreated (shaft, 2. 2 + / - 0. 77 ; P = 0. 003 ; tip, 2. 8 + / - 0. 92 ; P = 0. 01), Teflon-coated (shaft, 2. 7 + / - 0. 94 ; tip, 3. 1 + / - 0. 75), and etched tip (shaft, 3. 0 + / - 0. 82 ; tip, 3. 0 + / - 0. 56) needles.