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Table 3 Hemodynamic measurements before and after fluid bolus

From: Non-invasive assessment of Pulse Wave Transit Time (PWTT) is a poor predictor for intraoperative fluid responsiveness: a prospective observational trial (best-PWTT study)

parameter

before fluid bolus

after fluid bolus

fluid responder

non-responder

fluid responder

non-responder

PWTT raw c finger Q

290.4

273.1

272.1

270.3

PWTT raw c finger R

254.5

242.2

237.4

238.2

PWTT raw c ear Q

195.6

187.6

177.7

176.5

PWTT raw c ear R

159.1

156.9

142.4

146.2

PWTT raw non-c finger Q

268.6

262.8

253.7

253.5

PWTT raw non-c finger R

235.4

233.1

221.2

223.5

PWTT raw non-c ear Q

180.6

180.7

165.4

172.7

PWTT raw non-c ear R

146.6

151.2

132.4

143.2

PWTT Δ c finger Q

13.3

8.6

10.8

9.1

PWTT Δ c finger R

9.1

5.9

7.5

5.9

PWTT Δ c ear Q

13.1

8.0

11.7

7.6

PWTT Δ c ear R

9.3

4.5

7.7

4.3

PWTT Δ non-c finger Q

7.6

6.1

6.8

6.3

PWTT Δ non-c finger R

6.1

4.3

5.1

4.2

PWTT Δ non-c ear Q

12.0

8.3

10.2

10.5

PWTT Δ non-c ear R

10.9

5.6

7.7

8.2

∆ PP [%]

13.3

10.3

7.5

7.0

FTc [ms]

313.7

332.0

352.2

347.9

CO [l/min]

4.9

5.5

6.3

5.6

MAP [mmHg]

69.4

67.6

76.1

75.5

HF [min−1]

70.2

66.0

69.0

66.7

  1. Mean of hemodynamic measurements before and after fluid bolus, displayed separately for fluid responders (= increase in stroke volume of ≥ 10%) and non-responders (< 10%). PWTT raw measurements in [ms] vs. ∆ = respiratory variation in [%]; c = corrected measurements according to Bazett’s formula vs. non-c = uncorrected measurements; Q vs. R = start of PWTT-measurements with Q- or R-wave in ECG; finger vs. ear = pulse oximetry probe location; ∆PP = difference in pulse pressure in [%]; FTc corrected flow time in [ms], CO cardiac output in [litre/min], MAP mean arterial pressure in [mmHg], HF heart frequency in [min−1]