• Ahmed Hasanin, Kareem Taha, Bassant Abdelhamid, Ayman Abougabal, Mohamed Elsayad, Amira Refaie, Sarah Amin, Shaimaa Wahba, Heba Omar, Mohamed Maher Kamel, Yaser Abdelwahab, and Shereen M Amin.
• Department of anesthesia and critical care medicine, Cairo university, 01 elsarayah street, Elmanyal, Cairo, 11559, Egypt. ahmedmohamedhasanin@gmail.com.
• BMC Anesthesiol. 2018 Aug 14; 18 (1): 104.

BackgroundDexmedetomidine infusion improves oxygenation and lung mechanics in patients with chronic obstructive lung disease; however, its effect in patients with restrictive lung disease has not been thoroughly investigated yet. The aim of this work was to evaluate the effects of dexmedetomidine infusion on oxygenation and lung mechanics in morbidly obese patients with restrictive lung disease.MethodsForty-two morbidly obese patients scheduled for bariatric surgery were included in the study. Patients were randomized to receive either dexmedetomidine infusion at a bolus dose of 1mcg/Kg followed by infusion at 1 mcg/Kg/hour for 90 min (Dexmedetomidine group), or normal saline infusion (Control group). Both groups were compared with regard to: oxygenation {P/F ratio: PaO2/fraction of inspired oxygen (FiO2)}, lung compliance, dead space, plateau pressure, blood pressure, and heart rate.ResultsDexmedetomidine group showed significant improvement of the PaO2/FiO2 ratio, and higher lung compliance compared to control group by the end of drug infusion. Dexmedetomidine group demonstrated decreased dead space, plateau pressure, blood pressure, and heart rate compared to control group by the end of drug infusion.ConclusionA 90-min dexmedetomidine infusion resulted in moderate improvement in oxygenation and lung mechanics in morbidly obese patients with restrictive lung disease.Trial Registrationclinicaltrials.gov : NCT02843698 on 20 July 2016.

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