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  • Title: Dexmedetomidine in combination with midazolam after pediatric cardiac surgery.
    Author: Hasegawa T, Oshima Y, Maruo A, Matsuhisa H, Tanaka A, Noda R, Matsushima S.
    Journal: Asian Cardiovasc Thorac Ann; 2015 Sep; 23(7):802-8. PubMed ID: 25939906.
    Abstract:
    OBJECTIVE: Although midazolam is one of the most commonly used sedatives for infants in the intensive care unit, it has well-known disadvantages including a dose-dependent potential to induce tolerance, withdrawal, and hemodynamic depression. The aim of this study was to evaluate the clinical effects of dexmedetomidine combined with midazolam in postoperative intensive care following pediatric cardiac surgery. METHODS: Forty consecutive infants who underwent cardiac surgery for isolated ventricular septal defects from January 2011 to July 2013 were enrolled in this retrospective study. They were divided into two groups according to postoperative sedation regimen: dexmedetomidine sedation with midazolam (n = 20), or midazolam sedation without dexmedetomidine (control group, n = 20). Perioperative variables were compared between the two groups. RESULTS: There were no significant differences in patient characteristics between the two groups. During the first 24 h after intensive care unit admission, heart rate and serum lactate levels were significantly lower in the dexmedetomidine group compared to the control group (p = 0.0292 and p = 0.0027, respectively). The maximal midazolam dose was also significantly lower in the dexmedetomidine group (0.12 ± 0.09 vs. 0.20 ± 0.08 mg kg(-1) h(-1), p = 0.0059). There were no adverse effects of dexmedetomidine such as bradycardia, hypotension, agitation, or seizures. Three (15%) patients in the control group and none in the dexmedetomidine group experienced sudden cardiopulmonary decompensation. CONCLUSIONS: Dexmedetomidine can provide favorable sedative properties with a reduced requirement for concomitant midazolam and stable hemodynamics with tachycardia prevention, for postoperative intensive care following pediatric cardiac surgery.
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