Comparison of postoperative clinical effects of erector spinae plane block and patient controlled analgesia in thoracotomy patients

doi:10.4328/acam.20852

Mechanism of action of the erector spinae plane block: distribution of dye in a porcine model

Regional Anesthesia and Pain Medicine ◽

10.1136/rapm-2019-100964 ◽

2020 ◽

Vol 45 (3) ◽

pp. 198-203 ◽

Cited By ~ 16

Author(s):

Pablo E Otero ◽

Santiago E Fuensalida ◽

Pedro C Russo ◽

Natali Verdier ◽

Carlos Blanco ◽

...

Keyword(s):

Erector Spinae ◽

Clinical Effects ◽

Anatomical Distribution ◽

Anatomical Dissection ◽

Erector Spinae Plane Block ◽

Spinal Segments ◽

Dorsal Rami ◽

Rami Communicantes ◽

Lateral Branches ◽

Block Distribution

This study aimed to describe the anatomical distribution of dye injected in the erector spinae plane (ESP) in a porcine living model, which could aid to reveal factors potentially relevant to the unexplained clinical effects of the ESP block. Six pigs received 0.6 mL/kg of 0.25% new methylene blue at the level of the sixth thoracic vertebra through either a cranial-to-caudal or a caudal-to-cranial in-plane ultrasound-guided bilateral ESP injection 20 min before euthanasia.Spread of dye evaluated through transverse cryosections (four injections) extended from T5 to T10 and from T5 to T8 when a cranial-to-caudal direction of injection was used, and from T5 to T9 and from T5 to T8 when the opposite direction of injection was used. A median of 4.5 medial and lateral branches of the dorsal rami was observed stained through anatomical dissection (eight injections), regardless of the direction of injection. No evidence of dye was found in the thoracic paravertebral or epidural spaces, where the dorsal root ganglia, ventral rami and rami communicantes are located. In all the cases, dye solution was found in the prevertebral thoracic lymph nodes.In this study, ESP injection resulted in a median spread over five spinal segments (12 injections), staining the lateral and medial branches of the dorsal rami of the spinal nerves, regardless of the direction of the needle used.

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Efficacy of c-arm scopy-guided erector spinae plane block (ESPB) in postoperative pain control and reduction of opioid side effects in spinal instrumentation surgery

Romanian Neurosurgery ◽

10.33962/roneuro-2020-023 ◽

2020 ◽

pp. 150-153

Author(s):

Yasar Karatas ◽

Fatih Keskin ◽

Mehmet Fatih Erdi ◽

Bulent Kaya ◽

Ibrahim Kosemen ◽

...

Keyword(s):

Retrospective Study ◽

Side Effects ◽

Postoperative Pain ◽

Spinal Instrumentation ◽

Life Quality ◽

Erector Spinae ◽

Block Group ◽

Opioid Use ◽

Patient Controlled Analgesia ◽

Erector Spinae Plane Block

Background: Spinal instrumentation surgery causes significant pain in patients. As a result, patients are exposed to excessive opioid use and the associated side effects, as well as prolonged hospital stay, resulting in economic burden. Local anaesthetics can help both reduce postoperative pain and minimize the side effects associated with systemically administered opioid analgesics. Objective: The aim of this retrospective study was to investigate the effect of erector spinae plane block on analgesia in spinal instrumentation surgery and to reduce the side effects of excessive opioid use. Materials and Methods: We reported a retrospective study. Thirty patients, who underwent spinal instrumentation surgery from 2017 to 2018, were chosen from the hospital records. We performed spinal instrumentation and decompression by laminectomy to all patients under general anaesthesia. While 15 of these patients underwent erector spinae plane block, these patients received patient-controlled analgesia postoperative period. The other 15 patients received only patient-controlled analgesia postoperative period. We analyzed patients' data for differences in preoperative and postoperative visual analogue scores, nausea vomiting scores, constipation life quality scale, patient-controlled analgesia shot count and mean opioid consumption of patients. Results: The data of 30 patients undergoing lumbar spinal instrumentation surgery were retrospectively analyzed. There was no significant difference in the age, preoperative VAS, preoperative ODI and sex between the two groups (p?0,05). In addition, there were statistically significant differences in postoperative VAS, postoperative ODI, Nausea Vomiting Score, Constipation Life Quality Score (CLQS), petidin consumption and PCA shot count (p <0.05). In all variables with significant differences, the values ??in the block group were lower than the non-block group. Conclusion: ESPB provides effective analgesia and reduces side effects due to excessive opioid usage.

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