Is a mechanical-assist device better than manual chest compression? A randomized controlled trial

Figures & data

Table 1 Clinical characteristics between the manual chest compression group and chest compression with automatic chest compression device group

Factors	Manual group (N=39)	Device group (N=41)	P-value
Age, years	25.54 (8.88)	24.46 (3.63)	0.486
Female sex, n (%)	19 (48.72)	24 (60.98)	0.271
Body weight, kg	62.22 (14.47)	61.54 (14.81)	0.835
Height, m	1.66 (0.08)	1.65 (0.08)	0.346
Body mass index, kg/m^2	22.36 (3.8)	22.63 (4.6)	0.778
Occupation, n (%)			0.407
Medical student	24 (61.54)	25 (60.98)
Doctor	8 (20.51)	13 (31.71)
Nurse	4 (10.26)	1 (2.44)
Paramedic	1 (2.56)	0 (0)
Hospital staff	2 (5.13)	2 (4.88)
Completion of ACLS course, n (%)	34 (87.18)	38 (92.68)	0.476
Experience with chest compression, n (%)	30 (76.92)	35 (85.37)	0.334

Note: Data presented as mean (SD) unless indicated otherwise.

Abbreviations: ACLS, advanced cardiac life support; SD, standard deviation.

Table 2 Chest compression results between the manual chest compression group and chest compression with automatic chest compression device group

Chest compression outcomes	Manual group (n=39)	Device group (n=41)	P-value
Time to stop chest compression, seconds	179.67 (50.81)	223.93 (36.53)	<0.001
Compression rate/minute
0-1 minute	127.41 (27.77)	108 (9.45)	<0.001
1-2 minute	90.74 (51.57)	108.55 (9.93)	<0.001
2-3 minute	44.21 (52.89)	97.9 (30.74)	0.190
3-4 minute		90 (39.11)	<0.001
Compression depth after 2 minute, mm	56.42 (6.42)	54.25 (5.32)	0.052
Overall compression depth, mm	49.21 (6.04)	46.35 (6.40)	0.045
Percentage of shallow compression
0-1 minute	25.90 (35.55)	34.39 (35.21)	0.273
1-2 minute	46.49 (39.88)	61.22 (41.77)	0.159
2-3 minute	55.14 (44.46)	72.69 (37.81)	0.343
3-4 minute	62.18 (44.21)	80.23 (33.70)	0.106
Percentage of compression with incorrect hand position
0-1 minute	10.43 (25.37)	31.41 (41.59)	0.632
1-2 minute	18.53 (31.67)	30.82 (41.64)	1.000
2-3 minute	17.18 (33.78)	23.37 (37.53)	1.000
3-4 minute	23.44 (39.87)	19.29 (35.24)	0.642
Percentage of incomplete release
0-1 minute	6.78 (18.59)	0.90 (3.75)	0.999
1-2 minute	7.13 (19.82)	2.32 (9.92)	0.999
2-3 minute	6.25 (20.35)	1.92 (10.59)	0.999
3-4 minute	5.51 (15.43)	0.16 (0.81)	0.999

Note: Data presented as mean (SD).

Abbreviation: SD, standard deviation.

Figure 1 CPR RsQ Assist Device (CPR RAD) used for chest compression.