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Table 3 In vivo results; Group 1: flexible nasogastric tube, group 2: semi-rigid catheter

From: A pilot study of evaluation of semi-rigid and flexible catheters for less invasive surfactant administration in preterm infants with respiratory distress syndrome—a randomized controlled trial

 

Group 1

Group 2

Statistics

Number of infants randomized to group (prior to first attempt) n (%)

16 (51.6%)

15 (48.4%)

 

Laryngoscopy attempts

23

20

 

Failed first attempt n (%)

7 (43.8%)b

4 (26.7%)b

Failed first attempt OR 2.15

Fisher’s exact p = .46

Procedure duration (seconds)a

Mean

61.07 (44.9)a

64.87 (50.7)a

Wilcoxon: p = .771 (.623a)

95% CI

40.6–81.6 (32–58)a

42.4–79.7 (37.6–63.8)a

 

 Median

49 (43.5)a

49 (44)a

 

 Min

13 (13)a

27 (27)a

 

 Max

136 (83)a

130 (96)a

 

peripheral O2 Saturation % (median, 95% CI)a

 initial

95 (94)a [(91–98) (89.5–100)a]

92 (91.5)a [(90–97) (88–96)a]

Wilcoxon: p = .153 (.446)a

 lowest

91 (92)a [(90–100) (88–100)a]

85 (85)a [(84–94) (81.5–89.5)a]

Wilcoxon: p = .299 (.39)a

heart rate (median, 95% CI)a

 initial

163 (156)a [(150–183) (137–171)a]

159 (157)a [(148–161) (137–159)a]

Wilcoxon p = .662 (.432)a

 lowest

141 (142)a [(115–150) (111–151)a]

135 (135)a [(115–142) (113–143)a]

Wilcoxon p = .459 (.459)a

  1. a brackets show data with outlier excluded (I.e. 20% of the longest laryngoscopies excluded)
  2. b one infant was changed from group 1 to group 2 after the first failed attempt and the doctor therefore performed a second attempt using a semi-rigid catheter as prescribed for group 2. Failed laryngoscopy total attempts group 1 (including infant which was transferred to group 2): 8 (34.8%); group 2: 4 (20%)