Recognition and differentiation of Dural puncture click sensation

Background: We hypothesized that the click perceived when puncturing the dura-arachnoid with fine-gauge spinal needles can be subjectively identified, and investigated whether it may be distinguishable among different needle types.

Methods: Subjective and objective evaluations were performed. First, physicians punctured the polyamide film or porcine dura mater (n=70 and n=20, respectively) with seven types of spinal needles and numerically evaluated the perceived click sensations. Using an 11-point numerical rating scale (from “0” for “no click sensation” to “10” for “the strongest click perceived”) data, subjective differentiation among needle types was assessed. Second, in the objective part of the study, total forces elicited by polyamide film or porcine dura mater punctures with each needle were measured using a biomechanical testing device, and load-displacement curves evaluated. Third, the results of subjective and objective evaluations were compared.

Results: All participan...

背景：我们提出假说，使用细规格脊髓穿刺针（fine-gauge spinal needles）穿刺硬脊膜蛛网膜（dura-arachnoid）时所感知到的咔哒触感可被主观识别，并探究该触感是否可在不同类型的穿刺针之间加以区分。
方法：本研究开展主观与客观两类评估。其一，由医师采用7种不同型号的脊髓穿刺针，分别穿刺聚酰胺薄膜（polyamide film，n=70）与猪硬脑膜（porcine dura mater，n=20），并对感知到的咔哒触感进行量化评分。基于11点数字评分量表（评分范围为"0"代表"无咔哒触感"至"10"代表"感知到最强咔哒触感"）的数据，评估不同穿刺针间的主观触感差异。其二，在研究的客观环节中，借助生物力学测试装置（biomechanical testing device），测量每种穿刺针穿刺聚酰胺薄膜或猪硬脑膜时产生的总作用力，并对载荷-位移曲线（load-displacement curves）进行分析。其三，对主观与客观评估的结果展开对比分析。
结果：所有受试参与者……