Page 37 - JSOM Winter 2019

Combat Application Tourniquet, Generation 7 TABLE 20 CAT7 Simplicity of Application
(CAT7) – SCORE: 44.00. Total Part
Score Score Score Ease of Use n = Citation
The CAT7 has been in production and fielded since Septem- 50% rated CAT7 easier to
ber 2015. There are enough changes to assess The CAT7 as a 3 use. 24 39
different tourniquet. It should be noted that the modifications Difficulty assessment mean
developed into the CAT7 are generally the result of findings 5 2.3 (Easy) out of 10. 78 41
in studies of the CAT5 and CAT6, as well as feedback from Mean ease-of-use score was
the field. 4 5 (Easy) ± 0 out of 5. 4 40
3.83 Ease of use score of (n = 100)
FIGURE 3 Combat Application Tourniquet, Generation 7. 41% Easy, 33% Very Easy,
5 100 18
17% Neutral, 9% Difficult,
8.50 0% Very Difficult.
2 37% rated as easy. 110 42
Rated as either easy (41%) or
4 10 18
very easy (33%).
Part
Score Score Steps to Complete n = Citation
5 One-Handed – 5 steps. n/a 44
4.66 5 Two-Handed – 5 steps. n/a 44
4 Mean of 3.1 ± 1 turns. 80 40
https://www.narescue.com/all-products/massive-hemorrhage/combat
-application-tourniquet-c-a-t.html TABLE 21 CAT7 Pressures
Total
TABLE 18 CAT7 Occlusion Efficacy Score Score Pressures n = Citation
Total 5 216.67mmHg mean combined 412 Combined
Score Score Occlusion Efficacy n = Citation pressures of all studies.
10 92% effectiveness using ultrasound 24 39 4 343mmHg ± 116mmHg; p = .0024. 80 40
to determine popliteal occlusion. Interface pressure immediately
10 98.7% effectiveness. 80 40 5 after occlusion to arm – 189mmHg 55 42
4 73% effectiveness. 78 41 (± 51).
97% mean effectiveness in bleeding Interface pressure immediately
9 control 10 tests per tourniquet. 10 18 4.71 5 after occlusion to leg – 199mmHg 55 42
8.60 97.27% combined success rate of (± 37).
arm and leg (110 applications to 5 Maximal pressure median – 78 41
55 individuals – 1 arm application 217mmHg
and 1 leg with application Doppler 5 Applied pressure, 147mmHg 24 43
10 confirmation for 1 minute). 3 total 110 42 (0–217).
failures categorized as User Error 205mmHg mean tourniquet
(2– tourniquet too loose before 4 pressure. 10 18
twisting, 1–could not apply within
5 minutes.
TABLE 22 CAT7 Specifications
Total
TABLE 19 CAT7 Time of Application Score Score Specifications Scoring
Total
Score Score Time (Speed) of Application n = Citation 1 Width – ≥1.5 inches (critical 1.5 1 – Yes /
Median time to reach complete requirement). inches –1 – No
arterial occlusion was 37.5 Length – ≥37.50 inches or 37.50 1 – Yes /
5 (interquartile range [IQR], 27–52) 24 39 1 provide 35 inches circumferential inches –1 – No
seconds. (critical requirement).
Time to effective occlusion 27 5 1 – Yes /
5 78 41 1 Locking Mechanism/Method. Yes 0 – No
seconds (11–90).
Application time – 62 seconds (± 18) 1 – Yes /
4 to control bleeding. 80 40 1 Time Recording. Yes 0 – No
4.86 43.6 seconds (± 18.2) on 53 arm Weight – <8 ounces (critical for 1 – Yes /
5 53 42 1 JFAK inclusion). 2.7 oz –1 – No
applications.
40.4 seconds (± 13.0) on 53 leg
5 53 42
applications. TABLE 23 CAT7 Complications and Safety
Application time – 56 seconds Total
5 24 43
(41–71). Score Score Complications and Safety n = Citation
Application time – mean 32 No documented complications or
5 10 18
seconds. 5 5 safety problems identified in medical n/a n/a
literature.

Recommended Limb Tourniquets in TCCC | 35