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Table 1 Positive challenges.

From: In silico evaluation of a control system and algorithm for automated insulin infusion in the ICU setting

   

Overshoot (Glycemia > 140 mg × dL -1 )

Undershoot (glycemia < 60 mg × dL -1 )

Type of Challenge

Weight (Kg)

Hepatic Sensitivity (Sh)

Peak (mg × dL -1 )

Duration (min)

T S * (min)

Peak (mg × dL -1 )

Duration (min)

T S * (min)

  

0.7

144

38

72

no

no

n/a

 

80

0.5

154

72

95

no

no

n/a

  

0.3

168

102

144

no

no

n/a

  

0.7

144

30

90

no

no

n/a

Mild ¶

70

0.5

150

30

90

no

no

n/a

  

0.3

163

84

135

no

no

n/a

  

0.7

143

22

42

no

no

n/a

 

60

0.5

150

46

66

no

no

n/a

  

0.3

159

72

108

no

no

n/a

  

0.7

164

54

72

no

no

n/a

 

80

0.5

172

76

92

no

no

n/a

  

0.3

182

86

108

no

no

n/a

  

0.7

163

50

70

no

no

n/a

Moderate §

70

0.5

170

30

60

no

no

n/a

  

0.3

181

78

96

no

no

n/a

  

0.7

162

50

70

no

no

n/a

 

60

0.5

170

58

72

no

no

n/a

  

0.3

183

72

84

no

no

n/a

  

0.7

170

30

31

no

no

n/a

 

80

0.5

176

36

37

no

no

n/a

  

0.3

177

41

42

no

no

n/a

  

0.7

175

30

55

no

no

n/a

Severe †

70

0.5

180

15

120

no

no

n/a

  

0.3

191

36

39

no

no

n/a

  

0.7

189

30

31

no

no

n/a

 

60

0.5

188

29

30

no

no

n/a

  

0.3

201

36

38

no

no

n/a

  1. Note the inter-individual variations with body weight and/or hepatic sensitivity changes.
  2. (bold) The two rows in bold numbers are the ones represented in Figures 4 and 5 respectively
  3. (*) TS = settling time, minutes for the glycemia to return to the 90-120 mg × dL-1 range
  4. (¶) Mild challenge = 50 g of oral carbohydrate (from 50 g of starch)
  5. (§) 50 g of oral glucose (250 g of grapes)
  6. (†) 10 g intravenous glucose (20 mL of 50% dextrose in water) in 30 seconds