Page 15 - JSOM Fall 2024

FIGURE 4 Intra-participant variation of V and RR.
T
Scenario 1 Scenario 2 Scenario 3 Scenario 4
a b c d
200 200 200 8
✱
✱ ✱✱✱✱
160 160 160 6
SD V T (mL) 120 SD V T (mL) 120 SD V T (mL) 120 ✱✱ SD V T (mL) 4
80
80
80
40 40 40 2
0 0 0 0
C B C B C B C B
e Scenario 1 f Scenario 2 g Scenario 3 h Scenario 4
4 ✱✱ 4 4 ✱✱✱ 20 ✱✱
16
3
3
3
SD RR (min -1 ) 2 SD RR (min -1 ) 2 SD RR (min -1 ) 2 SD RR (min -1 ) 12 8
✱✱✱✱
1
1
1
4
0 0 0 0
C B C B C B C B
Intra-participant variation was measured as the SD of delivered V s (A-D) and RRs (E-H) throughout a given test, either without (C, yellow circles)
T
or with (B, purple circles) BENGI use (Wilcoxon signed rank test, *P<.05, **P<.01, ****P<.0001). N=20 participants for scenarios 1–3, and
n=16 participants for scenario 4.
BENGI = bag-valve-mask emergency narration guided instrument; RR = respiratory rate; V = tidal volume.
T

FIGURE 5 Representative Poincaré plots of delivered V (A-D) and RR (E-H) throughout a test, either without (C, yellow circles) or with
T
(B, purple circles) BENGI use.
Scenario 1 Scenario 2 Scenario 3 Scenario 4
900 900 400 45
40
800 375
800 35
700 350 30
V Tn+1 (mL) 600 V Tn+1 (mL) 700 V Tn+1 (mL) 325 V Tn+1 (mL) 25
500 300 20
600 15
400 275
10
300 500 250 5
300 400 500 600 700 800 900 500 600 700 800 900 250 275 300 325 350 375 400 5 10 15 20 25 30 35 40 45
V Tn (mL) V Tn (mL) V Tn (mL) V Tn (mL)
Scenario 1 Scenario 2 Scenario 3 Scenario 4
20 18 12 90
11
16 10 80
15
RR n+1 (min -1 ) RR n+1 (min -1 ) 14 RR n+1 (min -1 ) 9 RR n+1 (min -1 ) 70
60
12
10
10 8 7 50
5 8 6 40
5 10 15 20 8 10 12 14 16 18 6 7 8 9 10 11 12 40 50 60 70 80 90
-1
-1
-1
-1
RR n (min ) RR n (min ) RR n (min ) RR n (min )
Calculated SD1 and SD2 are shown as the minor and major axes, respectively, of constructed ellipses (shown in red), centered at the average
delivered value for a given test. Target V /RR is shown as a red diamond.
T
BENGI = bag-valve-mask emergency narration guided instrument; RR = respiratory rate; V = tidal volume.
T
Enhanced Manual Ventilation with a Handheld Audiovisual Device | 13