When performing lumbar epidural steroid injection on obese patients, needle placement can be challenging due to the difficulty in estimating the appropriate needle length to utilize. Often times, the standard 3.5‐inch Tuohy needle is too short to reach its target. In our case report, a needle‐through‐needle technique was attempted in a lumbar interlaminar epidural steroid injection procedure after the initial needle fell short of the epidural space. To avoid removing the initial needle and restarting the procedure using a longer needle, a 20‐gauge 6‐inch Tuohy needle was inserted into the 17‐gauge 3.5‐inch Tuohy needle, successfully reaching the epidural space. This technique can facilitate quicker needle placement by avoiding the need for restarting the procedure with a longer needle. Thus, procedural time and radiation exposure may be decreased, as may patient discomfort from repeat needle insertions.

中文翻译：

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腰椎间盘硬膜外类固醇注射针穿刺技术：一例报告。

当对肥胖患者进行腰椎硬膜外类固醇注射时，由于难以估计要使用的适当针头长度，因此针头放置可能具有挑战性。通常，标准的3.5英寸Tuohy针太短而无法达到目标。在我们的病例报告中，在最初的针头未达到硬膜外腔后，尝试在腰椎间盘硬膜外注射类固醇的过程中采用针刺法。为避免取下最初的针头并使用更长的针头重新开始操作，将20号6英寸Tuohy针插入了17号3.5英寸Tuohy针中，成功到达硬膜外腔。通过避免需要使用更长的针头重新开始操作，该技术可以帮助更快地放置针头。因此，可以减少程序时间和辐射暴露，