Efficacy of anterior approach to quadratus lumborum block in each abdominal and back region / 中华麻醉学杂志

ABSTRACT

Objective To evaluate the efficacy of the anterior approach to quadratus lumborum block in each abdominal and back region.Methods Twelve healthy volunteers of both sexes,aged 18-45 yr,of American Society of Anesthesiologists physical status Ⅰ or Ⅱ,with body mass index of 18-30 kg/m2,were enrolled in the study.Quadratus lumborum block was performed via the anterior approach under the guidance of ultrasound with 0.375％ ropivacaine 20 ml.The block was assessed by cold stimulation (ice cake) in each abdominal and back region (the right side of the body was divided into 15 regions using the anatomical landmarks on the body surface).The positive condition in each region was recorded at 30 min after administration.Results The region in which the positive rate ≤ 5％ was 0.The regions in which the positive rate ＞5％-20％ were 1 and 13 regions.The regions in which the positive rate ＞20％-50％ were 2,3 and 4 regions.The regions in which the positive rate ＞50％-70％ were 6,7 and 10 regions.The regions in which the positive rate ＞70％-＜95％ were 5,14 and 15 regions.The regions in which the positive rate ≥95％ were 8,9,11 and 12 regions.Conclusion The anterior approach to quadratus lumborum block is effective in the middle-lower region of the anterior abdominal wall on the blocked side.