Medina-Bautista Francisco, Nocera Irene, Sánchez de Medina Antonia, Di Franco Chiara, Briganti Angela, Morgaz Juan, Granados María Del Mar
Animal Medicine and Surgery Department, Universidad de Córdoba, 14014 Córdoba, Spain.
Department of Veterinary Sciences, University of Pisa, 56124 Pisa, Italy.
Animals (Basel). 2025 Aug 1;15(15):2264. doi: 10.3390/ani15152264.
The objective of this study was to evaluate the feasibility and efficacy of the ultrasound-guided thoracolumbar erector spinae plane (TL-ESP) block in standing horses. A total of 24 injections ( = 12) were performed at the L1 level using either 0.1 mL/kg of saline solution (SS group) or 2% lidocaine (LID group). The block feasibility was assessed based on needle visualization and injection time, while efficacy was evaluated through craniocaudal and dorsoventral (DV) spread using the pinprick technique over 270 min. Desensitization was observed at least once in 100% of horses in the LID group and in 75% in the SS group ( = 0.001). However, in the SS group, desensitization was primarily limited to the Th18 metamer at the 2 cm DV position, with a shorter duration compared to the LID group. The block onset occurred at 22.5 (11.25-60) min in the LID group and at 5 (5-30) min in the SS group ( = 0.069). The number of affected metamers was significantly higher in the LID group (2 [1-3]) compared to the SS group (1 [1-2.25], = 0.014). At the 2 cm DV point, the end of the block effect occurred at 135 (120-210) min in the LID group and at 60 (3.75-60) min in the SS group ( = 0.001). Needle visualization was excellent in 95.8% of cases, and the mean injection time was 2.5 (2-3) min. These findings confirm that the TL-ESP block is a feasible technique in standing horses. However, its effect is predominantly localized to dorsal dermatomes with a limited ventral spread. Future studies evaluating larger volumes and multiple injection sites are warranted to enhance its clinical applicability.
本研究的目的是评估超声引导下在站立马中进行胸腰段竖脊肌平面（TL-ESP）阻滞的可行性和有效性。在L1水平使用0.1 mL/kg的生理盐水溶液（SS组）或2%利多卡因（LID组）共进行了24次注射（每组12次）。基于针的可视化和注射时间评估阻滞的可行性，同时通过在270分钟内使用针刺技术评估头尾向和背腹向（DV）扩散来评价有效性。LID组100%的马至少观察到一次脱敏，SS组为75%（P = 0.001）。然而，在SS组中，脱敏主要局限于DV位置2 cm处的第18胸节段，且持续时间比LID组短。LID组阻滞起效时间为22.5（11.25 - 60）分钟，SS组为5（5 - 30）分钟（P = 0.069）。LID组受影响的节段数（2 [1 - 3]）显著高于SS组（1 [1 - 2.25]，P = 0.014）。在DV点2 cm处，LID组阻滞效果结束时间为135（120 - 210）分钟，SS组为60（3.75 - 60）分钟（P = 0.001）。95.8%的病例针可视化良好，平均注射时间为2.5（2 - 3）分钟。这些发现证实TL-ESP阻滞在站立马中是一种可行的技术。然而，其效果主要局限于背部皮节，腹侧扩散有限。有必要进行进一步研究评估更大剂量和多个注射部位，以提高其临床适用性。
