Low C K, Vartany A, Engstrom J W, Poncelet A, Diao E
Department of Orthopaedic Surgery, University of California, San Francisco, USA.
J Hand Surg Am. 1997 Sep;22(5):901-5. doi: 10.1016/S0363-5023(97)80088-3.
A randomized double-blinded study was performed on 20 normal volunteers to evaluate 2 different techniques of single-injection digital anesthesia. Single-injection transthecal digital block technique was used to anesthetize 1 index finger and single-injection subcutaneous technique to block the other index finger. Pain and light touch were evaluated and sensory nerve-conduction studies were performed on both index fingers. These data were obtained prior to the nerve blocks and then at 10-minute intervals until recovery from the anesthesia. The method of anesthesia was found to have no effect on the distribution, onset, and duration of anesthesia. Median and radial nerve sensory nerve action potential amplitude reductions following digital anesthesia were also not influenced by the technique of anesthesia. Single-injection subcutaneous block was found to be easier to administer and to produce less pain during and 24 hours after injection than did the single-injection transthecal technique.
对20名正常志愿者进行了一项随机双盲研究，以评估两种不同的单次注射手指麻醉技术。采用单次注射经皮手指阻滞技术麻醉1根食指，采用单次注射皮下技术阻滞另一根食指。对两根食指进行疼痛和轻触觉评估，并进行感觉神经传导研究。这些数据在神经阻滞前获取，然后每隔10分钟获取一次，直至麻醉恢复。结果发现麻醉方法对麻醉的分布、起效和持续时间没有影响。手指麻醉后正中神经和桡神经感觉神经动作电位幅度的降低也不受麻醉技术的影响。结果发现，与单次注射经皮技术相比，单次注射皮下阻滞更容易实施，且在注射期间和注射后24小时产生的疼痛更少。
