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In our study, It was aimed to determine the dose of morphine that provides the most effective analgesia with the least incidence of side effects in the postoperative period.
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Spinal anesthesia is a widely used method in cesarean section operations. It has become a popular practice to add opioids to local anesthetic agents to improve the quality and prolong the duration of intraoperative and postoperative analgesia. Morphine and fentanyl are commonly used opioids for this purpose. In cesarean sections, intrathecal morphine (ITM) is preferred for postoperative analgesia due to its slow onset and long-term analgesia, and intrathecal fentanyl is preferred for intraoperative analgesia due to its faster onset of action.
ITM can cause side effects such as nausea, vomiting, itching, sedation and respiratory depression. The quality of analgesia and the incidence of side effects may vary depending on the ITM dose used. There are studies indicating that reducing the dose of ITM results in good quality, long-term analgesia with a low incidence of side effects. However, the ideal dose of ITM providing optimal postoperative analgesia with the lowest incidence of side effects for cesarean section has not been determined yet in the literature. For this purpose, in this study it was compared the postoperative analgesia efficiency and incidence of side effects of three different ITM doses in order to contribute to the literature.
Patients were divided into three groups:
Group 1: 10 mg hyperbaric bupivacaine + 20 mcg fentanyl+ 80 mcg intrathecal morphine was administered.
Group 2: 10 mg hyperbaric bupivacaine + 20 mcg fentanyl+ 120 mcg intrathecal morphine was administered.
Group 3: 10 mg hyperbaric bupivacaine + 20 mcg fentanyl+ 160 mcg intrathecal morphine was administered.
All patients received iv Patient Controlled Analgesia (PCA) prepared with fentanyl postoperatively.
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150 participants in 3 patient groups
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Data sourced from clinicaltrials.gov
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