Uterine Cancer Clinical Trial
Official title:
A Comparison Between Continuous Infusion vs. Patient Controlled Intraabdominal Injection of Local Anesthetics for Treatment of Postoperative Pain After Abdominal Hysterectomy. A Randomized, Double-blind Study.
Local anesthetics (LA) are increasingly used for postoperative pain management. Speicifically, several studies have found benefit of LA injected intra-abdominally following abdominal hysterectomy. However, it remains unclear whether the pain relief seen is due to local anesthetic mechanisms within the abdominal cavity or through systemic absorption. The aim of this study is to assess whether lidocaine administered intravenously has similar analgesic efficacy as the same dose administered intra-abdominally in patients undergoing abdominal hysterectomy. All patients would have rescue analgesia using the patient controlled analgesia (PCA) pump with morphine in order to achieve adequate pain management during 24 h.
Abdominal hysterectomy with or without salipingo-oophorectomy is associated with
moderate-severe postoperative pain. Poor pain control in the postoperative period can lead
to increased postoperative morbidities and poor quality of life. Furthermore, an emerging
clinical literature suggests that acute pain may rapidly evolve into chronic pain if poorly
treated. A meta-analysis of the literature found that > 30% patients had chronic pain one
year after abdominal hysterectomy (5). Therefore, efficient postoperative pain management is
imperative for the patient and is one of the new pain management standards recommended
recently.
Local anesthetics (LA) have been infiltrated subcutaneously, infused intra-abdominally, as
well as injected into the peritoneal cavity as a single dose at the end of the operation
following abdominal hysterectomy with variable effects. When injected as a single dose,
analgesia is limited to approximately 2-4 hours due to the short duration of action of local
anesthetics. In one recent study, the authors used a catheter inserted intra-abdominally and
local anesthetic or placebo infusion into the abdominal cavity for 24 h postoperatively and
found a reduction in postoperative analgesic requirements by 40% during 4-24 h. In another
study, the investigators found that LA injected intermittently intra-abdominally resulted in
better pain relief compared to intra-abdominal infusions.
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Allocation: Randomized, Endpoint Classification: Efficacy Study, Intervention Model: Parallel Assignment, Masking: Double Blind (Subject, Caregiver, Investigator, Outcomes Assessor), Primary Purpose: Treatment
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