Dermatomal coverage of single-injection ultrasound-guided parasagittal approach to anterior quadratus lumborum block at the lateral supra-arcuate ligament

In this study, we determined the effectiveness of a new ultrasound-guided parasagittal approach to anterior QL block at the lateral supra-arcuate ligament. Twenty six patients scheduled for laparoscopic renal surgery were enrolled. The parasagittal approach to the anterior QL block at the lateral supra-arcuate ligament was carried out preoperatively. Our data showed that at 5 and 10  min after injection, the patients achieved the sensory block of dermatomes T9–T12 and T7–L1, respectively. Some patients achieved coverage as cephalad as T5 and as caudal as L3. Four patients (16.7%) developed quadriceps weakness after the blocks. The parasagittal technique provides a new choi ce for postoperative analgesia of abdominal surgery with rapid onset and reliable dermatomal coverage.Trial registration: Chinese Clinical Trial Registry: ChiCTR2000029211.
Source: Journal of Anesthesia - Category: Anesthesiology Source Type: research