Table 2. Characteristics of the saline, NaHCO3, and trometamol groupsa.
aValues are presented as mean ± standard deviation, with range in brackets.
bAnion gap = Na+ − Cl− − HCO3−
*significantly different in comparison with Saline, p < 0.05;
†significantly different in comparison with NaHCO3, p < 0.05.
BW: body weight.
|
Characteristic |
Saline (n = 5) |
NaHCO3 (n = 4) |
Trometamol (n = 5) |
p value |
|
Minute ventilation/BW (L/min/kg) |
0.556 ± 0.138 (0.380 − 0.752) |
0.451 ± 0.026 (0.428 − 0.477) |
0.381 ± 0.050* (0.299 − 0.432) |
0.0320 |
|
Respiratory rate (per min) |
47 ± 9 (38 − 59) |
48 ± 7 (39 − 53) |
44 ± 8 (38 − 58) |
0.7897 |
|
pH |
7.257 ± 0.032 (7.216 − 7.299) |
7.505 ± 0.020* (7.483 − 7.532) |
7.467 ± 0.028* (7.422 − 7.491) |
< 0.0001 |
|
PaCO2 (mmHg) |
42.9 ± 6.9 (38.7 − 55.1) |
51.6 ± 2.8 (48.8 − 54.6) |
44.7 ± 3.4 (40.7 − 48.5) |
0.0523 |
|
PaO2 (mmHg) |
224 ± 15 (206 − 243) |
202 ± 15 (180 − 211) |
201.2 ± 9.7* (190 − 216) |
0.0309 |
|
HCO3 − (mEq/L) |
18.5 ± 3.2 (16.1 − 23.9) |
40.6 ± 1.5* (39.5 − 42.7) |
31.4 ± 1.5*† (30.4 − 33.9) |
< 0.0001 |
|
Base excess (mEq/L) |
− 6.4 ± 5.4 ( − 10.4 − 2.8) |
15.6 ± 1.3* (14.4 − 17.2) |
7.2 ± 1.3*† (5.8 − 9.2) |
< 0.0001 |
|
Anion gap (mEq/L)b |
4.7 ± 2.4 (1.6 − 6.9) |
2.6 ± 2.0 (1.3 − 5.5) |
− 9.4 ± 2.3*† ( − 12.8 to − 6.5) |
< 0.0001 |
|
Na+ (mEq/L) |
138 ± 2 (136 − 142) |
149 ± 2* (147 − 151) |
133 ± 6† (128 − 143) |
0.0004 |
|
K+ (mEq/L) |
2.3 ± 0.4 (1.8 − 2.7) |
2.3 ± 0.3 (1.9 − 2.7) |
2.7 ± 0.2 (2.3 − 2.8) |
0.1779 |
|
Ca2+ (mEq/L) |
1.06 ± 0.15 (0.92 − 1.29) |
0.81 ± 0.04 (0.77 − 0.84) |
0.90 ± 0.19 (0.72 − 1.22) |
0.0628 |
|
Cl − (mEq/L) |
115 ± 3 (112 − 120) |
106 ± 3* (102 − 110) |
111 ± 5 (108 − 120) |
0.0131 |
|
Hb (g/dL) |
7.9 ± 0.7 (6.7 − 8.6) |
8.8 ± 0.5 (8.3 − 9.4) |
8.7 ± 0.6 (8.1 − 9.4) |
0.0727 |
|
Lactate (mmol/L) |
1.9 ± 1.2 (0.5 − 3.8) |
1.6 ± 0.6 (0.9 − 2.1) |
1.4 ± 0.4 (0.8 − 2.0) |
0.6998 |
|
Mean arterial pressure (mmHg) |
66 ± 13 (46 − 79) |
67 ± 9 (54 − 77) |
64 ± 10 (50 − 79) |
0.9618 |