Brief Article
Copyright ©2011 Baishideng Publishing Group Co.
World J Gastroenterol. Aug 21, 2011; 17(31): 3630-3635
Published online Aug 21, 2011. doi: 10.3748/wjg.v17.i31.3630
Table 1 Types of endoscopic procedures
n (%)MalesFemalesAgerange (yr)Meanage (yr)
Upper (U)218 (72.4)1061121-188.86
Lower (L)16 (5.3)1421-169.09
U & L67 (22.3)40272-1810.89
Total301160141
Table 2 Midazolam and ketamine doses
Midazolam doses
Ketamine doses
AllpatientsMalesFemalesAllpatientsMalesFemales
Min dose (mg/kg)0.070.070.070.310.310.46
Max dose (mg/kg)0.390.320.392.672.002.67
Mean dose (mg/kg)0.160.150.161.061.031.08
Table 3 Sedative doses
Midazolam doses (mg/kg)
Ketamine doses (mg/kg)
MinMaxAverageMinMaxAverage
Upper (U)0.070.390.150.332.671.02
Lower (L)0.070.320.170.601.841.12
U & L0.080.270.180.312.111.17
Table 4 Distribution of patients receiving doses exceeding recommended max dose
ProcedureMidazolam
Ketamine
n (%)% per specificproceduren (%)% per specificprocedure
Upper (U)30 (57)144 (50)1.8
Lower (L)5 (9)310 (0)0
U & L18 (34)274 (50)6
Total53 (17.6)8 (2.7)
Table 5 Sedation failure
Sedative-related complicationsn (%)
Desaturation < 94% in RA37 (12.3)
Desaturation < 94% on supplemental O24 (1.3)
Respiratory distress4 (1.3)
Apnea0 (0.0)
Bradycardia0 (0.0 )
Cardiac arrest0 (0.0)
Emergence reaction0 (0.0 )
Difficult to sedate/third medication6 (2.0 )
Need for reversal medications12 (4.0 )
Need for overnight stay1 (0.3)
Failure to complete the procedure7 (2.3 )
Table 6 Effects of midazolam and ketamine dosing on development of desaturations
ProcedureMidazolam average dose (mg/kg)
Ketamine average dose (mg/kg)
Patients with desaturationPatients without desaturationP valuePatients with desaturationPatients without desaturationP value
Upper (U)0.260.14< 0.0012.20.86< 0.001
Lower (L)NA0.17NANA1.12NA
U &0.240.168< 0.00121.01< 0.001
n37264NA37264NA