Perineural Dexamethasone for Continuous Femoral Nerve Block

Gangnam Severance Hospital18 enrolled

Overview

An alternative to improve the quality of postoperative analgesia is to use various perineural adjuvants applicable to peripheral nerve block along with local anesthetics to increase the analgesic effect. Dexamethasone is a strong and long-acting corticosteroid, which reduces postoperative nausea and vomiting and increases the duration of nerve blockade. Most of the existing clinical studies compared the analgesic effect with the placebo group after adding an adjuvant in a single shot nerve block, and there were very few cases of comparing the analgesic effect with the placebo group after adding the adjuvant in peripheral nerve block through continuous catheter infusion. Therefore, we designed this study to investigate whether the use of dexamethasone as a peripheral adjuvant for continuous femoral nerve block has a better pain and recovery profile.

Study Type

INTERVENTIONAL

Allocation

RANDOMIZED

Purpose

SUPPORTIVE_CARE

Masking

DOUBLE

Enrollment

Conditions

Total Knee Arthroplasty

Interventions

1\) Arm l (dexamethasone group) Ultrasound-guided femoral nerve block with 1% lidocaine 15 ml after the end of surgery Postoperative femoral nerve patient controlled analgesia * Total volume 250 ml (0.375% ropivacaine 60 ml + normal saline 188 ml + dexamethasone 10 mg (2 ml)) * Basal rate 4 mL/hr, Bolus volume 2 mL, Lock-out time 15 min

sham groupPROCEDURE

2\) Arm ll (sham group) Ultrasound-guided femoral nerve block with 1% lidocaine 15 ml after the end of surgery Postoperative femoral nerve patient controlled analgesia * Total volume 250 ml (0.375% ropivacaine 60 ml + normal saline 190 ml * Basal rate 4 mL/hr, Bolus volume 2 mL, Lock-out time 15 min

Eligibility

Sex: ALLMin age: 19 Years

Medical Language ↔ Plain English

Inclusion Criteria: 1. Patients 19 years of age or older who are expected to undergo unilateral hip arthroplasty 2. ASA PS 1-3 Exclusion Criteria: 1. Revision total hip arthroplasty 2. Allergy to drugs used in the study 3. Patients with moderate or more hepatic impairment (AST/ALT is more than 2.5 times the upper limit of normal) 4. Estimated glomerular filtration rate \< 30 mL/min/1.73m2 5. Opioid dependence 6. Prolongation of PT and aPTT more than twice the upper limit of normal 7. Pre-existing neurological or anatomical disorders of the lower extremities 8. Serious psychiatric disorders

Outcomes

Primary Outcomes

Maximum Numeric rating scale pain score at movement

Pain intensity at movement will be evaluated by an 11-point numeric rating scale (NRS: 0 = no pain, 10 = worst imaginable pain) postoperative 1 hour, postoperative 6 hours, postoperative day 1, postoperative day 2. Maximum Numeric rating scale pain score was determined based on highest score among repeated assessment of surgical site pain severity postoperatively.

Time frame: within postoperative day 2

Secondary Outcomes

Numeric rating scale pain score at rest

Pain intensity at rest will be evaluated by an 11-point numeric rating scale (NRS: 0 = no pain, 10 = worst imaginable pain) postoperative 1 hour, postoperative 6 hours, postoperative day 1, postoperative day 2.

Time frame: up to postoperative day 2

Numeric rating scale pain score at movement

Pain intensity during 45-degree passive flexion of the hip with the ipsilateral knee flexed naturally will be evaluated by an 11-point numeric rating scale (NRS: 0 = no pain, 10 = worst imaginable pain) postoperative 1 hour, postoperative 6 hours, postoperative day 1, postoperative day 2.

Time frame: up to postoperative day 2

Postoperative opioid consumption

morphine equivalent dose

Time frame: up to postoperative day 2

Perineural Dexamethasone for Continuous Femoral Nerve Block

Overview

Conditions

Interventions

Eligibility

Locations (1)

Outcomes

Primary Outcomes

Secondary Outcomes