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Table 1 Patient characteristics

From: Monitoring tissue oxygenation index using near‐infrared spectroscopy during pre‐hospital resuscitation among out‐of‐hospital cardiac arrest patients: a pilot study

  ROSC group
(n = 26)
Non-ROSC group
(n = 55)
 
Male, n (%) 19 (73.1) 32 (57.1) 0.166
Age (years), mean (SD) 72.4 (13.9) 80.8 (11.8) 0.006
Shockable rhythm, n (%) 7 (26.9) 1 (1.8) < 0.01
Witness, n (%) 16 (61.5) 9 (16.4) < 0.01
Bystander CPR, n (%) 10 (38.5) 24 (42.9) 0.707
Time from EMS call to the scene (min),
median [IQR]
9 [8-10] 8 [6-10] 0.099
Time from EMS call to the hospital (min),
median [IQR]
32 [27–36] 34 [29–40] 0.245
Time during ambulance (min), median [IQR] 8.5 [6-10] 9 [7-12] 0.089
Epinephrine dose during ambulance (mg), median [IQR] 1 [0–2] 1 [0–3] 0.48
Suspected cardiac cause, n (%) 11 (42.3) 3 (5.4) < 0.01
Blood gas analysis ROSC group Non-ROSC group  
pH, mean (SD) a
PaCO2 (Torr), median [IQR] a
PaO2 (Torr), median [IQR] a
HCO3 (mmol/L), mean (SD) a
Blood sugar (mg/dl), median [IQR] b
Lactate (mmol/L), mean (SD) c
Potassium (mmol/L), mean (SD) d
6.94 (0.19)
65.3 [44.2–90.0]
96.2 [31.0-274.9]
13.8 (6.2)
265 [209–388]
9.7 (4.6)
5.5 (1.5)
6.75 (0.22)
90.5 [67.4122.3]
38.7 [22.5–77.9]
12.7 (5.2)
173 [102–268]
13.4 (4.4)
7.2 (1.7)
< 0.01
0.012
0.007
0.427
0.013
0.002
< 0.01
  1. aThe number of non-ROSC group was 44
  2. bThe number of non-ROSC group was 33
  3. cThe number of non-ROSC group was 38
  4. dThe number of non-ROSC group was 30
  5. Abbreviations: CPA cardiopulmonary arrest, CPR cardiopulmonary resuscitation, EMS emergency medical services, ROSC return of spontaneous circulation, TOI tissue oxygenation index