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Table 3 Arterial blood gas analyses and respiratory values

From: Percutaneous dilatational tracheostomy with single use bronchoscopes versus reusable bronchoscopes – a prospective randomized trial (TraSUB)

 

Timepoint 1

Timepoint 2

Timepoint 3

SUB

CONV

SUB

CONV

p

SUB

CONV

p

pH

7.46 [7.43;7.48]

7.43 [7.40;7.46]

7.36 [7.33;7.40] a

7.36 [7.33;7.39] a

0.806

7.29 [7.26;7.31] a,b

7.30 [7.27;7.33] a,b

0.675

paO2/ FiO2

[kPa]

41 (35;47)

36 (30;42)

56 (50;63)

56 (50;62)

0.828

54 (48;60)

53 (47;59)

0.822

paCO2

[kPa]

5.0 [4.4;5.6]

5.4 [4.7;6.0]

6.3 [5.7;6.9]a

6.9 [6.2;7.5]a

0.216

8.0 [7.4;8.6]a,b

8.1 [7.4;8.7]a,b

0.925

SaO2

[%]

95 [92;98]

95 [92;98]

100 [96;103]

100 [96;103]

0.990

96 [93;99]

100 [96–103]

0.104

Peak

[hPa]

20 [17;23]

22 [19;25]

22 [19;25]

24 [21;27]

0.223

24 [21;27] a

25 [22;28]

0.572

PEEP

[hPa]

7 [6;7]

8 [7;9]

7 [6;8]

8 [7;9]

0.032

7 [6;7]

8 [8;9]

0.019

etCO2

[kPa]

4.3 [3.9;4.8]

4.3 [3.9;4.8]

4.7 [4.3;5.1]

4.8 [4.4;5.3]

0.722

5.4 [4.9;5.9] a,b

5.3 [4.8;5.7] a

0.660

Vt

[ml]

454 [369;539]

516 [432;601]

385 [300;470]

413 [328;497]

0.646

427 [342;512]

412 [327;497]

0.800

MV

[l*min−1]

10.1 [8.7;11.6]

9.8 [8.4;11.3]

7.4 [5.9;8.8] a

7.6 [6.2;9.0] a

0.805

8.4 [6.9;9.8]

7.6 [6.1;9.0] a

0.406

C

[ml*hPa−1]

52 [43;60]

45 [36;54]

39 [30;48] a

39 [31;48]

0.971

38 [29;47] a

43 [34;51]

0.430

RR

[min−1]

22 [19;24]

21 [19;24]

19 [17;21] a

19 [17;21] a

0.912

21 [18;23]

19 [17;21] a

0.306

SpO2

[%]

95 [91;99]

94 [91;98]

100 [99;107] a

99 [95;102]

0.086

99 [95;103]

99 [96;103]

0.947

  1. Abbreviations: SUB single-use bronchoscope, CONV reusable bronchoscope, paO2 Partial pressure of arterial oxygen, paCO2 Partial pressure of arterial carbon dioxide, SaO2 Arterial oxygen saturation, Peak: Peak airway pressure, PEEP Positive end-expiratory pressure, etCO2 End-tidal carbon dioxide tension, Vt Tidal volume, MV Minute ventilation, C Compliance, RR Respiratory rate, FiO2 Fraction of inspired oxygen, SpO2 Oxygen saturation as measured by pulse oximetry
  2. Data are shown as the mean and 95% confidence intervals, time point 1: before start of intervention, time point 2: before tracheal cannulation, time point 3: after insertion of tracheal cannula. Statistical analysis was done with linear mixed models. p Values in columns indicate differences between single-use and reusable bronchoscope groups at the respective time points
  3. a p < 0.05 vs. time point 1
  4. b p < 0.05 vs. time point 2
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BMC Anesthesiology

ISSN: 1471-2253

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