Table 5.
Comparison between DNS incidence among patients treated with NBO and patients treated with HBO. Base-line characteristics of patients (n = 108)
| Variables (before or upon ED admission) | Patient number = 108 mean ± SD | OTI group (patient n = 55) mean ± SD | OTN group (patient n = 53) mean ± SD | p value |
|---|---|---|---|---|
| Age (years) | 44 ± 20 | 40.6 ± 20.4 | 48.2 ± 21.5 | >.05 |
| Sex (male) | 50 (50.9%) | 23 (41.8%) | 27 (50.9%) | >.05 |
| Duration of exposure > 6 hours | 41 (37.9%) | 27 (49.9%) | 14 (26.4%) | .01 |
| Suicide attempt | 4 (3.7%) | 3 (5.4%) | 1 (1.8%) | >.05 |
| Hb (g/dL) | 14 ± 1.7 | 13.8 ± 1.6 | 14 ± 1.8 | >.05 |
| WBC (per microlitre) | 10.100 ± 3.890 | 10.300 ± 4.100 | 9.800 ± 3.500 | >.05 |
| Plt (per microlitre) | 226.000 ± 50.000 | 220.100 ± 45.000 | 233.000 ± 54.300 | >.05 |
| Troponin I (ng/mL) (n = 36) | 0.85 ± 3.54 | 0.98 ± 3.88 (n = 30) | 0.22 ± 0.44 (n = 6) | >.05 |
| CPK (U/L) (n = 93) | 298 ± 867 | 385 ± 1149 (n = 50) | 195 ± 265 (n = 43) | >.05 |
| Lactate (mmol/L) (n = 65) | 1.94 ± 1.6 | 2.05 ± 1.78 (n = 43) | 1.75 ± 1.1 (n = 22) | >.05 |
| pH | 7.40 ± 0.08 | 7.41 ± 0.06 | 7.39 ± 0.1 | >.05 |
| paCO2 (KPa) | 4.81 ± 0.94 | 4.73 ± 0.6 | 4.89 ± 1.21 | >.05 |
| paO2 (KPa) | 15.8 ± 8.78 | 16.7 ± 8.0 | 14.7 ± 9.4 | >.05 |
| GCS <9 | 15 (13.8%) | 9 (16.3%) | 6 (11.3%) | >.05 |
| Transient loss of consciousness | 75 (69.4%) | 42 (76.3%) | 33 (62.2%) | >.05 |
| Seizures | 14 (12.9%) | 12 (21.8%) | 2 (3.7%) | .008 |
| Systolic blood pressure <90 mmHg | 4 (3.7%) | 1 (1.8%) | 3 (5.6%) | >.05 |
| Postural instability | 32 (29.6%) | 14 (25.4%) | 18 (33.9%) | >.05 |
| Headache | 54 (50%) | 31 (63.6%) | 23 (43.3%) | >.05 |
| GCS between 14 and 9 | 29 (26.8%) | 14 (25.4%) | 15 (28.3%) | >.05 |
| Severe metabolic acidosis (pH <7.2) | 11 (10.1%) | 5 (9%) | 6 (11.3%) | >.05 |
| Dyspnea | 5 (4.6%) | 2 (3.6%) | 3 (5.6%) | >.05 |
| Mean carboxyhemoglobin level at admission (%) | 27.7 ± 9.6 | 25.9 ± 9.41 | 29.5 ± 9.7 | >.05 |
| Evidence of myocardial injury | 33 (30.5%) | 14 (25.4%) | 19 (35.8%) | >.05 |
| DNS incidence at one month | 29 (26.8%) | 13 (23.6%) | 16 (30.1%) | >.05 |
Only patients presenting at admission signs and symptoms currently considered indications for HBO therapy in our hospital were selected.