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Clinical Trial Summary

Several studies have shown that sacral espb blocks the dorsal ramus of spinal nerves. In lumbar discectomy operations, innervation of all tissues where pain occurs is provided by the dorsal ramus of the nerves. Based on this information, it was thought that sacral espb would be effective in lumbar discectomies. The investigators wanted to look at the effects of sacral erector spinae plane block on postoperative pain and opioid consumption in lumbar discectomy operations. There is no randomised controlled study on sacral espb in the literature. The researchers think that the results of the study are promising. Sacral espb is an easy-to-administer block with a low risk of complications and can be used effectively in lumbar discectomy analgesia.


Clinical Trial Description

This prospective, randomised, controlled, double-blind, single-centre study was approved by our Ethics Committee (KAEK2023/06). The investigators followed the Consolidated Reporting Trials Standards (CONSORT). It was conducted in patients undergoing elective lumbar discectomy, and informed consent was obtained from the patients. They were randomised using a closed envelope technique, opened by the physician performing the block. 54 patients were included in the study, divided into two groups of 27 patients as esp block (group 1) and control group (group 2), both groups underwent standard general anaesthesia. The blocks were performed in the operating theatre at the end of the operation, before the patient woke up. The patients were unaware that the block was being performed on them. A patient-controlled analgesia (PCA) device was given to both groups by another doctor blinded to the group, and Visual Analogue Scale (VAS) scores assessed for 24 hours. Standard monitoring (peripheral oxygen saturation, electrocardiogram, non-invasive arterial blood pressure monitoring) was performed. Anaesthesia induction was achieved with 1 mcg/kg fentanyl, 2 mg/kg propofol, 0.6 mg/kg rocuronium, and anaesthesia maintenance with 2% sevoflurane, 4 lt/min 50%/50% oxygen/nitrogen mixture. Both groups received 1 g IV paracetamol towards the end of surgery. The patients were extubated after 2 mg/kg of sugammadex and were transferred to the recovery room. The first group underwent sacral espb at the end of surgery. The lumbosacral region was sterilised with povidine iodine and then draped with the patient in prone position. The linear ultrasound probe was placed in the midline on the spinous process of the 5th lumbar vertebra after the sterile covering had been applied. After observation of the sacrum, the level of the 2nd median crest was determined and the ultrasound probe was moved 1.5-2 cm laterally and the 2nd intermediate crest and the erector spinae muscle between the two were observed. 22 G 50 mm needle was advanced from caudal to cranial direction to the sacral crest using in-plane technique, after confirming the needle position with 1-2 ml saline, 0.25% bupivacaine 20 ml was administered, local anaesthesia was observed to spread cauda-cranially separating the erector spinae muscle from the sacral crest, the same procedure was performed on the opposite side. All patient demographics, age, weight, and duration of surgery, post-operative VAS scores, blood pressure, heart rate and oxygen saturation values at 30 min, 1, 6, 12 and 24 hours, total tramadol consumption, rescue analgesic use, time of first rescue analgesic requirement, patient satisfaction and side effects were recorded. The Shapiro-Wilk test was used to examine the normality of quantitative data. Comparison of normally distributed data was performed by independent samples t-test, and comparison of non-normally distributed data was performed by Mann-Whitney U test. Comparison of qualitative data was performed using the Pearson chi-squared test. Data were presented as mean ± standard deviation, median (minimum - maximum) and n (%). Statistical significance was accepted as p<0.05. In a previous study (9), the power analysis performed to detect a difference of 15.4 mg between the 48-hour opioid consumption values of the two groups (p<0.05) was calculated with 90% power and an effect size of 0.96, and the required sample size was determined to be 24 for each group. If 10-15% of patients were excluded from the study, 27 patients were included for each group and 54 patients in total. ;


Study Design


Related Conditions & MeSH terms


NCT number NCT06028100
Study type Interventional
Source Giresun University
Contact
Status Completed
Phase N/A
Start date June 1, 2023
Completion date August 30, 2023

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