Intrathecal Morphine

How it works

Benefits

Dosage & preparation

Risks & contraindications

Background

Highlighted claims

• Intrathecal morphine's analgesic effects are dose-dependent, but adverse effects such as respiratory depression and pruritus are clinically important. — Effect of bupivacaine combined with morphine intrathecal injection on postoperative recovery quality in patients undergoing pulmonary surgery: a study protocol for a multicentre, randomised, double-blind, controlled trial
• Intrathecal morphine was first reported in 1979. — Effect of bupivacaine combined with morphine intrathecal injection on postoperative recovery quality in patients undergoing pulmonary surgery: a study protocol for a multicentre, randomised, double-blind, controlled trial
• Intrathecal morphine acts directly on central mu-opioid receptors through cerebrospinal fluid circulation. — Effect of bupivacaine combined with morphine intrathecal injection on postoperative recovery quality in patients undergoing pulmonary surgery: a study protocol for a multicentre, randomised, double-blind, controlled trial
• A single intrathecal morphine injection can produce analgesia lasting 24 to 48 hours due to prolonged retention in cerebrospinal fluid. — Effect of bupivacaine combined with morphine intrathecal injection on postoperative recovery quality in patients undergoing pulmonary surgery: a study protocol for a multicentre, randomised, double-blind, controlled trial
• A key limitation of intrathecal morphine alone is that its peak effect is delayed by about 6 hours, which may not satisfy intraoperative analgesic needs. — Effect of bupivacaine combined with morphine intrathecal injection on postoperative recovery quality in patients undergoing pulmonary surgery: a study protocol for a multicentre, randomised, double-blind, controlled trial
• Morphine's hydrophilic nature limits spinal capillary absorption, enabling effective low-dose intrathecal analgesia. — Effect of bupivacaine combined with morphine intrathecal injection on postoperative recovery quality in patients undergoing pulmonary surgery: a study protocol for a multicentre, randomised, double-blind, controlled trial
• The protocol selects 0.25 mg morphine based on evidence that 0.3 mg and 0.25 mg regimens were effective with acceptable safety in abdominal and cardiac surgery. — Effect of bupivacaine combined with morphine intrathecal injection on postoperative recovery quality in patients undergoing pulmonary surgery: a study protocol for a multicentre, randomised, double-blind, controlled trial
• Previous studies have used intrathecal morphine doses ranging from 0.1 mg to 4 mg, and doses of 0.2 to 0.4 mg have provided postoperative analgesia in major abdominal surgery without respiratory depression. — Effect of bupivacaine combined with morphine intrathecal injection on postoperative recovery quality in patients undergoing pulmonary surgery: a study protocol for a multicentre, randomised, double-blind, controlled trial