Effects of ketamine on the severity of depression and anxiety following postoperative mechanical ventilation: a single-blind randomized clinical trial in Iran
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Background: In this study, we compare the effects of ketamine and the combination of midazolam and morphine on the severity of depression and anxiety in mechanically ventilated patients after discharge from the intensive care unit (ICU).Methods: This randomized single-blind clinical trial included 50 patients who were candidates for craniotomy and postoperative mechanical ventilation in the ICU of 5 Azar Teaching Hospital in Gorgan City, North Iran, from 2021 to 2022. Patients were allocated to two groups by quadruple block randomization. In group A, 0.5 mg/kg of ketamine was infused over 15 minutes after craniotomy, and then continued at a dose of 5 µ/kg/min during mechanical ventilation. In group B, midazolam was infused at a dose of 2–3 mg/hr and morphine at a dose of 3–5 mg/hr. After patients were discharged from the ICU, if their Glasgow Coma Scale scores were ≥14, Beck’s anxiety and depression inventories were completed by a psychologist within 2 weeks, 2 months, and 6 months after discharge.Results: The mean scores of depression at 2 months (P=0.01) and 6 months (P=0.03) after discharge were significantly lower in the ketamine group than in the midazolam and morphine group. The mean anxiety scores were significantly lower in the ketamine group 2 weeks (P=0.006) and 6 months (P=0.002) after discharge. Conclusions: Ketamine is an effective drug for preventing and treating anxiety and depression over the long term in patients discharged from the ICU. However, further larger volume studies are required to validate these results.
Abstract
Background: In this study, we compare the effects of ketamine and the combination of midazolam and morphine on the severity of depression and anxiety in mechanically ventilated patients after discharge from the intensive care unit (ICU).Methods: This randomized single-blind clinical trial included 50 patients who were candidates for craniotomy and postoperative mechanical ventilation in the ICU of 5 Azar Teaching Hospital in Gorgan City, North Iran, from 2021 to 2022. Patients were allocated to two groups by quadruple block randomization. In group A, 0.5 mg/kg of ketamine was infused over 15 minutes after craniotomy, and then continued at a dose of 5 µ/kg/min during mechanical ventilation. In group B, midazolam was infused at a dose of 2–3 mg/hr and morphine at a dose of 3–5 mg/hr. After patients were discharged from the ICU, if their Glasgow Coma Scale scores were ≥14, Beck’s anxiety and depression inventories were completed by a psychologist within 2 weeks, 2 months, and 6 months after discharge.Results: The mean scores of depression at 2 months (P=0.01) and 6 months (P=0.03) after discharge were significantly lower in the ketamine group than in the midazolam and morphine group. The mean anxiety scores were significantly lower in the ketamine group 2 weeks (P=0.006) and 6 months (P=0.002) after discharge. Conclusions: Ketamine is an effective drug for preventing and treating anxiety and depression over the long term in patients discharged from the ICU. However, further larger volume studies are required to validate these results.
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