Page 40 - JSOM Winter 2023

FIGURE 5 Times from “Touch Tightening” to “Done” and “Go” to “Done.”
(A) 2 4 "Touch tightening" to "Done" (seconds) 30 60 90 (B) 15 20 25 30 35 "Go" to "Done" (seconds) 90 95 100 100 150 200
16
14
22
18
24
30
20
8
10
12
28
26
6
80
45
85
50
70
40
60
65
55
75
Tight strap
Occluded
Tightening
system
secure Occluded
Loose strap
Occluded
Tightening
system
secure CAT7
SOFTTW3
SOFTTW5
Premature TMT
Occluded OMT
Tightening X8T
system
not secure Tac RMT
RST
CAT7
SOFTTW3
SOFTTW5
Premature TMT
OMT
X8T (C) "Go" to "Done" (seconds)
Tac RMT
RST 10 20 30 40 50 60 70 80 90 90 190 290
A video orientation for the graphs can be accessed at https://vimeo.com/ CAT7 38.78, 39.75
799965802. In (A) and (B), the x-axis has application processes and Median times (seconds):
process quality for processes that occur between touching the tighten-
ing system or picking up the tourniquet and a completed application
with hands off the tourniquet; symbols for applications with the good SOFTTW3 47.00, 47.76
version of the indicated processes have open circles; and symbols for
applications with a bad version have downward-pointing open tri-
angles. The colors on the graphs are linked with the tourniquets as
follows: CAT7 = gray, SOFTTW3 = red, SOFTTW5 = orange, TMT
= magenta, OMT = dark blue, X8T = dark green, Tac RMT = light SOFTTW5
green, RST = lavender. In (A), times are for applications with good 35.71, 36.61
orientation when the strap was secured (good orientation defined
as the video-shown orientation 2-10 with the redirect buckle lateral
and the tightening system located above the redirect). In (B), times
are for applications with good orientation at initial placement. In
(C), the x-axis has the tourniquet; symbols for video frame-by-frame TMT 62.40, 63.95
determined times have open circles; symbols for real time stopwatch
times have filled circles; and times are for all applications regardless
of orientation.
(A) Times from “touch tightening system” to “Done.” P-values for time OMT 36.91, 37.83
comparisons between each of the tourniquets are as follows:
• Occluded at “Done” applications, n=409, p<.030 TMT versus all
except SOFTTW3; p<.030 SOFTTW3 versus all except TMT
• Occluded and tightening system secure at “Done” applications;
n=361; p<.030 TMT versus OMT, X8T, Tac RMT, and RST; p=.054 X8T 37.39, 38.41
TMT versus SOFTTW5; p<.040 SOFTTW3 versus SOFTTW5,
OMT, X8T, Tac RMT, and RST
• Tight strap Occluded Tightening system secure, n=190, p=.048
SOFTTW3 versus OMT; p=.149 SOFTTW3 versus Tac RMT;
p=.098 CAT7 versus OMT
• Loose strap Occluded Tightening system secure; n=171; p<.040 Tac RMT 45.29, 46.25
TMT versus OMT, X8T, and Tac RMT; p=.051 TMT versus RST;
p<.030 SOFTTW3 versus OMT, X8T, Tac RMT, and RST; p=.054
SOFTTW5 versus X8T
• Occluded Tightening system not secure, n=48, p=.005 TMT versus
CAT7 RST 37.89, 38.28
• Time comparisons were not done among applications with tightening
system use stopped prematurely.
P-values for time comparisons within a specific tourniquet are as
follows: (B) Times from “Go” to “Done.” P-values for time comparisons be-
• TMT p=.017 Premature (n=13) versus Occluded at “Done” (n=45) tween each of the tourniquets are as follows:
• SOFTTW3 p=.025 Tight strap Occluded Tightening system secure • Occluded at “Done” applications, n=404, p<.002 TMT versus all;
(n=22) versus Loose strap Occluded Tightening system secure p=.040 Tac RMT versus OMT; p=.056 Tac RMT versus X8T.
(n=24)
• SOFTTW5 p<.0001 Tight strap Occluded Tightening system secure P-values for time comparisons within a specific tourniquet are as
(n=38) versus Loose strap Occluded Tightening system secure follows:
(n=13) • SOFTTW3 p=.132 Occluded (n=48) versus Premature (n=10).
• TMT p=.003 Tight strap Occluded Tightening system secure (n=14) (C) Times for each tourniquet from “Go” to “Done” from video frame-
versus Loose strap Occluded Tightening system secure (n=20) by-frame and from real time stopwatch. Median times are shown just
• Tac RMT p=.018 Tight strap Occluded Tightening system secure above the x-axis. For each tourniquet, frame-by-frame versus real time
(n=20) versus Loose strap Occluded Tightening system secure (n=33). stopwatch p<.0001, r>0.9988, and median difference <0.91 seconds.
38 | JSOM Volume 23, Edition 4 / Winter 2023