Feasibility of lateral vs. transmuscular quadratus lumborum block in calves:a cadaver study
- Author:
Bruna ALONSO
1
;
Christophe CASTELEYN
;
Katrien VANDERPERREN
;
Lieven VLAMINCK
;
Jaime VISCASILLAS
;
Stijn SCHAUVLIEGE
Author Information
- Publication Type:Research Report
- From:Journal of Veterinary Science 2026;27(1):e15-
- CountryRepublic of Korea
- Language:English
-
Abstract:
Objective:To investigate the feasibility of 2 ultrasound-guided QLB approaches - lateral (QLB-L) and transmuscular (QLB-T) - in calf cadavers.
Methods:Ten calf cadavers underwent bilateral QLB at L1 using QLB-L (n=5) or QLB-T (n = 5). Each cadaver received 0.4 mL/kg on one side and 0.6 mL/kg on the other.A 1:2 iohexol:methylene blue mixture was injected under ultrasound guidance. Computed tomography and gross dissection assessed craniocaudal spread and staining of ventral rami and sympathetic trunk segments.
Results:The number of stained nerves was similar for both approaches. L1 and L2 were stained in all injections; T13 was stained in all but 1 QLB-L small-volume injection;T12 staining occurred most often with QLB-T small-volume injections (4/5) and in 2/5 injections in the remaining groups; T11 staining was limited (1/5 QLB-L and 2/5 QLB-T;both volumes); T10 to T4 staining occurred once (QLB-T large volume).
Conclusions:and Relevance: Both approaches were anatomically feasible in calf cadavers and produced injectate spread consistent with potential abdominal wall target coverage. Clinical trials are needed to determine analgesic efficacy and safety.
