Hemodynamic Changes during a Deep Inspiration Maneuver Predict Fluid Responsiveness in Spontaneously Breathing Patients
Table 2
Velocity peak of femoral artery flow during quiet spontaneous breathing and deep inspiration maneuver in healthy volunteers.
VF during quiet spontaneous
VF during deep inspiration
ΔVF (%)
ΔVFdim (%)
breathing (cm/s)
maneuver (cm/s)
Inspiration
Exhalation
Phase 1
Phase 2
Phase 3
Phase 4
1
81.2
92.2
73.2
92.1
64
92.9
12.7
13.4
2
64
72.3
59
71.2
55.4
76.5
12.2
17.8
3
71.8
82.8
62.1
82.9
51.7
88
14.2
20.3
4
75.7
83.5
68.1
82.6
52.1
87.8
9.8
14.8
5
56.1
61.3
50
66.9
36.4
64.8
8.9
17.6
6
86.8
91.6
81.3
99.6
76.3
88.8
5.4
13.7
Mean ± SD
72.6 ± 11.2
80.6 ± 11.9
65.6 ± 11
82.6 ± 12.3
56 ± 13.4
83.1 ± 10.5
10.5 ± 3.2
16.2 ± 2.7a
VF, velocity peak of femoral artery flow; ΔVF, respiration-induced change in VF; ΔVFdim, deep-inspiration-maneuver-induced change in VF. versus ΔVF. Values are expressed as mean ± SD.
