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Ultrasound-Guided Erector Spinae Block Versus Ultrasound-Guided Thoracic Paravertebral Block for Pain Relief in
Esraa H Abdelwahab1, Abeer A Hodeib2, Hesham M Marof1
1Anesthesiology, Surgical ICU and Pain Medicine, Tanta University.
Background:
Severe acute pain is a significant risk factor for postherpetic neuralgia (PHN). The importance of early management in alleviating zoster pain cannot be overstated.
Objectives:
This study aimed to determine the efficiency and safety of one bolus injection thoracic paravertebral block (PVB) and erector spinae plane block (ESB) in individuals with acute thoracic herpes zoster (HZ) in preventing PHN.
Study Design:
A prospective randomized controlled trial.
Setting:
Tanta University Hospitals, Tanta, Egypt.
Methods:
Ninety participants over the age of 50 years with chest wall herpetic eruption, lasting shorter than a week along with moderate to severe pain, who got adequate antiviral medication. Patients were chosen at random and classified into 3 equal groups. Group C (control group) did not receive any intervention. Group ESB received US-guided ESB with 25 mg bupivacaine 0.5%, plus 8 mg dexamethasone (10 mL volume). Group PVB received US-guided PVB with 25 mg bupivacaine 0.5%, plus 8 mg dexamethasone (10 mL volume).
Results:
Numerical rating scale (NRS) showed insignificant differences at baseline. NRS for pain at 1, 3, 4, 12, and 24 weeks was significantly reduced in group ESB compared to group C and in group PVB than group C and insignificantly different between group ESB and group PVB. Doses of pregabalin and acetaminophen were comparable at 1 week among the studied groups. Doses of pregabalin and acetaminophen at 3, 4, 12, and 24 weeks were significantly lesser in group ESB compared to group C and in group PVB than group C and insignificantly different between group ESB and group PVB. After 3 months, the incidence of persistent herpetic pain was not significantly different between the study groups. After 6 months, the incidence of persistent herpetic pain was statistically significantly lower in groups ESB and PVB than in group C (P = 0.037 and 0.015, respectively) without significant difference between group ESB and group PVB.
Limitations:
Small sample size, single center study.
Conclusions:
Both ESB and PVB were effective in controlling acute pain and persistent herpetic pain after 6 months (which was evident by lower NRS for pain and doses of pregabalin and acetaminophen), but ESB is safer (no reported pneumothorax and hypotension).
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