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The purpose of this study was to investigate the ability of single- versus dual-plane ultrasound scan-assisted spinal anesthesia techniques to improve the success rate and efficacy of spinal anesthesia in elderly patients undergoing lower extremity surgery. A total of 120 elderly patients undergoing lower extremity surgery were randomly assigned to either receive single-plane (Group A) or dual-plane ultrasonic scan-assisted spinal anesthesia (Group B). The primary outcome analyzed by this study was first-attempt success rate. Secondary outcomes analyzed included number of needle insertion attempts, needle redirections, locating time, procedural time, total time, puncture depth, quality of ultrasound images, level of block, adverse reactions, and complications. The first-attempt success rate was significantly higher in Group B compared to Group A (88.3% vs. 68.3%, p = 0.008). In comparison with Group A, the number of needle insertion attempts (1 (1−2) vs. 1 (1−1), p = 0.005) and needle redirections (2 (1−3) vs. 1 (0−2), p &lt; 0.001) were both significantly lower in Group B; Group B also had a shorter procedural time (249.2 ± 30.1 vs. 380.4 ± 39.4 s, p &lt; 0.001) but a longer locating time (250.1 ± 26.2 vs. 137.8 ± 13.5 s, p &lt; 0.001). The dual-plane ultrasonic scan-assisted spinal anesthesia technique warrants consideration for application in elderly patients.

Dual- vs. Single-Plane Ultrasonic Scan-Assisted Positioning during Lumbar Spinal Puncture in Elderly Patients: A Randomized Controlled Trial