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Table 2 Intraoperative Characteristics

From: Dexmedetomidine for prevention of postoperative pulmonary complications in patients after oral and maxillofacial surgery with fibular free flap reconstruction:a prospective, double-blind, randomized, placebo-controlled trial

Characteristic Dexmedetomidine group Placebo group P value
(n = 80) (n = 80)
Cervical lymph node dissection, No. (%)
 No 17 (21.2) 15 (18.8) 0.719
 Unilateral 45 (56.3) 50 (62.5)  
 Bilateral 18 (22.5) 15 (18.7)  
Duration of surgery, median (IQR), mina 330 (275, 382) 310 (263, 393) 0.386
Duration of anesthesia, median (IQR), minb 362 (302, 428) 358 (298, 442) 0.732
Duration of limb ischemia time, median (IQR), minc 59 (53, 71) 60 (50, 68) 0.611
Vital volume, median (IQR), ml 425 (400, 450) 425 (400, 450) 0.860
Respiratory rate, median (IQR), breaths/ min 12 (12, 13) 12 (12, 14) 0.905
Peak pressure, median (IQR), cmH2O
 After intubation 15 (13, 16) 14 (13, 16) 0.281
 The highest during the surgery 16 (14, 18) 16 (14, 18) 0.989
 Before the end of the surgery 15 (14, 17) 15 (14, 17) 0.664
FiO2, median (IQR) 50 (50, 50) 50 (50, 50) 0.277
Intraoperative medication, median (IQR)
 Sufentanil, μg 30 (20, 40) 30 (25, 45) 0.083
 Propofol, mg 1200 (1000, 1500) 2500 (2000, 2700) 0.000
 Remifentanil, μg 1450 (1000, 1980) 2625 (1700, 3000) 0.000
 Dexmedetomidine, μg 188 (168, 200) 0 (0, 0) 0.000
Crystalloids, median (IQR), ml 1700 (1700, 2200) 1700 (1600, 2200) 0.947
Synthetic colloids, median (IQR), ml 500 (500, 500) 500 (500, 500) 0.149
Estimated blood loss during surgery, median (IQR), ml 300 (200, 400) 300 (200, 350) 0.508
Urine output, median (IQR) 675 (400, 900) 500 (350, 700) 0.016
Total intraoperative infusion, median (IQR), ml 1450 (1000, 1900) 1450 (1075, 1875) 0.895
  1. Abbreviations: FiO2 Fraction of inspired oxygen
  2. a Calculated as the time between skin incision and closure of the incision
  3. b Calculated as the time from the start of induction to the patient leaving the operating room
  4. c Calculated as the time from the beginning of inflation to the end of exhalation of the tourniquet in the thigh