The combination of subarachnoid anaesthesia (SAB) and continuous local wound infiltration (LCWI) with a consistent amount of local anaesthetics could prevent central sensitization through an additive or synergistic effect because it can maintain continuous inhibition of nociceptive afferents
Wound infiltration with local anesthetics is an analgesic technique that has been adopted for post-operative analgesia following a range of surgical orthopaedic procedures. Pain management by infusion of local aesthetic into wounds was found to improve pain, reduced opioid use and side effects, increase patient satisfaction, and shorten the hospital stay when compared to placebo or no treatment, but actually it was not definitively proven that wound infiltration provides additional analgesic or outcome benefit in the setting of a comprehensive multimodal analgesic approach. The hypothesis of this study is that a consistent amount of Levobupivacaine 0.5% for LCWI and LIA could provide a more extended postoperative analgesia for post-operative incident and rest pain with a better post-operative recovery and rehabilitation following THA, in the first 72 hours after surgery.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
PREVENTION
Masking
TRIPLE
Enrollment
96
An infusion rate of 10 ml/h of 1500 mg of 0.5 % of levobupivacaine for the first 30 h and 5 ml/h for the second 30 h (LCWI) were injected into the surgical wound.
An infusion rate of 10 ml/h of 300 ml of saline solution for the first 30 h and 5 ml/h for the second 30 h (LCWI) were injected into the surgical wound.
Incident and rest pain (using VAS score) at 72 hours after surgery
The 11-point numeric scale ranges from '0' representing one pain extreme (e.g. "no pain") to '10' representing the other pain extreme (e.g. "pain as bad as you can imagine" or "worst pain imaginable").
Time frame: 72 hours
Consumption of painkillers (in mg) at 72 hours after surgery
The equianalgesic dose (in mg) of morphine
Time frame: 72 hours
Side effects (PONV) at 72 hours after surgery
Time to have post-operative nausea and vomiting (in minutes)
Time frame: 72 hours
Toxicity of local anaesthetics (epilepsy) at 72 hours after surgery
Presence or not of epilepsy
Time frame: 72 hours
Wound healing at 72 hours
Number of infections of surgical wound.
Time frame: 72 hours
Improvement of rehabilitation at 72 hours
Our total hip arthroplasy rehabilitation protocol is focused on the following manoeuvres: contraction of the gluteal and quadricipital muscles, passive and active mobilization of the hip joint, passive and active mobilization of the knee and walking with crutches and a walker.the improvement of rehabilitation manoeuvres has been evaluated in a four-step scale: 0-no improvement; 1- slight improvement, 2- good improvement; 3- great improvement.
Time frame: 72 hours
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