Mohammed Saadawi1, Sebastián Layera2, Julián Aliste2, Daniela Bravo2, Prangmalee Leurcharusmee3, De Q Tran4. 1. St. Mary's Hospital, Department of Anesthesiology, McGill University, 3830 Ave Lacombe, Montreal H3T-1M5, Quebec, Canada. 2. Hospital Clínico Universidad de Chile, Department of Anesthesiology and Perioperative Medicine, University of Chile, Office B222 second floor, sector B, 999 Santos Dumont, Independencia, Santiago 8380456, Chile. 3. Maharaj Nakorn Chiang Mai Hospital, Department of Anaesthesiology, Chiang Mai University, 110 Intawarorot Street, Chiang Mai 50200, Thailand. 4. St. Mary's Hospital, Department of Anesthesiology, McGill University, 3830 Ave Lacombe, Montreal H3T-1M5, Quebec, Canada. Electronic address: de_tran@hotmail.com.
Abstract
STUDY OBJECTIVE: This narrative review discusses the anatomy, mechanism of action, techniques, pharmacology, indications, complications and substitutes for erector spinae plane (ESP) blocks. INTERVENTIONS: The Medline, Embase and Google Scholar databases (inception-last week of April 2020) were searched. For indications and alternative blocks, a systematic analysis of the available evidence was carried out. In order to highlight the best evidence available, only randomized trials with prospective registration, blinded assessment and sample size justification were retained for analysis. MAIN RESULTS: The collective body of anatomical studies suggests that ESP block may work through a combination of different mechanisms (e.g., local anesthetic spread to the thoracic paravertebral space, epidural space, and dorsal ramus). Compared to control, the available evidence suggests that ESP block results in decreased postoperative pain and opioid requirement for a wide array of thoracic and abdominal surgical interventions. Erector spinae plane blocks and thoracic paravertebral blocks seem to provide comparable benefits for thoracoscopic and breast cancer surgery when performed with a similar number of injections. Currently, ESP blocks should be favored over intercostal blocks since, at best, the latter provide similar analgesia to ESP blocks despite requiring multiple-level injections. CONCLUSIONS: In recent years, ESP blocks have become the topic of considerable clinical interest. Future trials are required to investigate their optimal technique, dose of local anesthetic and perineural adjuvants. Moreover, additional investigation should compare ESP blocks with robust multimodal analgesic regimens as well as truncal blocks such as thoracic epidural block, midpoint transverse process to pleura block, PECS block, quadratus lumborum block, and transversus abdominis plane block.
STUDY OBJECTIVE: This narrative review discusses the anatomy, mechanism of action, techniques, pharmacology, indications, complications and substitutes for erector spinae plane (ESP) blocks. INTERVENTIONS: The Medline, Embase and Google Scholar databases (inception-last week of April 2020) were searched. For indications and alternative blocks, a systematic analysis of the available evidence was carried out. In order to highlight the best evidence available, only randomized trials with prospective registration, blinded assessment and sample size justification were retained for analysis. MAIN RESULTS: The collective body of anatomical studies suggests that ESP block may work through a combination of different mechanisms (e.g., local anesthetic spread to the thoracic paravertebral space, epidural space, and dorsal ramus). Compared to control, the available evidence suggests that ESP block results in decreased postoperative pain and opioid requirement for a wide array of thoracic and abdominal surgical interventions. Erector spinae plane blocks and thoracic paravertebral blocks seem to provide comparable benefits for thoracoscopic and breast cancer surgery when performed with a similar number of injections. Currently, ESP blocks should be favored over intercostal blocks since, at best, the latter provide similar analgesia to ESP blocks despite requiring multiple-level injections. CONCLUSIONS: In recent years, ESP blocks have become the topic of considerable clinical interest. Future trials are required to investigate their optimal technique, dose of local anesthetic and perineural adjuvants. Moreover, additional investigation should compare ESP blocks with robust multimodal analgesic regimens as well as truncal blocks such as thoracic epidural block, midpoint transverse process to pleura block, PECS block, quadratus lumborum block, and transversus abdominis plane block.
Authors: V Rao Kadam; G Ludbrook; R M van Wijk; P Hewett; V Thiruvenkatarajan; S Edwards; P Williams; S Adhikary Journal: BMC Anesthesiol Date: 2021-10-26 Impact factor: 2.217