Blood Values Neonate
Management guidelines for students, interns and registrars on a variety of routine and emergency situations in our neonatal service at Tygerberg Children’s Hospital. Published in 2014.
Chemistry
Creatinine (µmol/l)
| GA (weeks) |
Birth |
Peak (hr) |
48 Hr |
Day 7 |
Day 14 |
| 27- 29 |
77 +/- 12 |
179 +/- 21 (39h) |
116 – 40 |
84 +/- 32 |
72 +/- 32 |
| 30 – 32 |
65 +/- 4 |
139 +/- 19 (33h) |
104 +/- 38 |
83 +/- 41 |
69 +/- 32 |
| 33 – 35 |
73 +/- 6 |
120 +/- 20 (15h) |
93 +/- 39 |
68 +/- 44 |
55 +/- 36 |
| > 36 |
65 +/- 5 |
75 +/- 38 |
50 +/- 36 |
38 +/- 20 |
Potassium (mmol/l) Serum 10% higher than whole blood
|
Preterm (serum)
|
Day 7: 4.6 -6.6 |
Day 2: 4.6 – 7.0 |
|
Term (serum)
|
<1wk: 3.5 – 6.0
|
1-4wk: 3.7 – 6.6
|
Sodium (mmol/l)
|
Preterm
|
Day 7: 133 - 146 |
|
|
Term
|
< 1wk: 133 – 146
|
1-4 wk: 134 - 144
|
Urea (mmol/l)
|
|
Birth |
48Hr |
1 Week |
|
Preterm
|
0.5 – 6.7
|
5 (4 – 9)
|
0.5 – 4.2
|
|
Term
|
1.6 – 10.0
|
0.7 – 6.7
|
1.6 – 5.0
|
Calcium (total) mmol/l
|
|
Birth |
1 Week |
1 Month |
|
Preterm
|
1.75 – 2.80
|
|
|
|
Term
|
2.10 – 2.70
|
2.20 – 2.70
|
2.15 – 2.65
|
Phosphate (mmol/l)
|
|
Birth |
1 Week |
1 Month |
|
Preterm
|
1.00 -2.60
|
|
|
|
Term
|
1.8 -3.0
|
1.4 – 3.0
|
1.7 - 3.0
|
Magnesium (mmol/l)
|
|
Birth |
1 Week |
1 Month |
|
Preterm
|
0.62 – 1.25
|
|
|
|
Term
|
0.7 – 1.0
|
0.85 – 1.05
|
0.65 – 1.0
|
Lactate (fasting) mmol/l
|
Term
|
1Hr: 0.9 – 2.7 |
24Hr: 0.8 – 1.2 |
Day 7: 0.5 – 1.4 |
Haematology
TERM
|
Cord |
12Hr |
24Hr (Day1) |
Day 3 |
Day 7 |
4 Weeks |
|
| Hb (g/dl) |
14–20 |
14–22 |
13.8–21.8 |
14-20 |
12.7 +/- 1.6 |
|
| Hct (%) |
43–63 |
61 +/- 7.4 |
62 +/- 9.3 |
56 +/- 9.4 |
36 +/- 4.8 |
|
| Platelets (x 109/l) |
150–350 |
150–350 |
150–350 |
150–350 |
150–350 |
150–350 |
| WCC(x 109/l) or mm3 |
9.0–30.0 |
13-38 |
9.4-34 |
5.0–21.0 |
5.0–19.0 |
|
| APTT (s) |
42.9 +/- 5.8 |
42.6 +/- 8.62(D5) |
40.4 +/- 7.4 |
|||
| PT (s) |
13 +/- 1.43 |
12.4 +/- 1.46 (D5) |
11.8 +/- 1.25 |
|||
| INR |
0.53–1.62 (0.9–2.7)∗ |
0.53–1.26 |
||||
| Fibrinogen (g/l) |
2.8 +/- 0.6 |
3.12 +/- 0.75 (D5) |
2.7 +/- 0.5 |
∗Different source (wide range, depending on gestation): Reverdiau-Moalic P, et al. Blood 1996;88:900
PRETERM
|
Day 1 |
Day 3 |
Day 12 – 14 |
Day 24 – 26 |
Day 40 - 42 |
|
| Hb (g/dl) |
16.5–21.7 |
11.6 – 19.3 |
10.8 – 18.4 |
8.9 – 16.5 |
7.9 – 14.9 |
| Hct (%) |
52–69 |
36 – 59 |
32 – 55 |
27 – 50 |
24 – 47 |
| Platelets (x 109/l) |
112–380 |
75 – 400 |
110 – 543 |
128 – 600 |
133 - 619 |
| WCC (x 109/l) or mm3 |
5 - 19 |
4 – 33.8 |
7.5 – 22.1 |
6.4 – 15.8 |
6.1 – 14.1 |
| APTT (s) |
27.5– 9.4 |
26.9 – 74.1 (D5) |
26.9 – 62.5 |
||
| PT (s) |
10.6– 6.2 |
10.0 – 15.3 (D5) |
10.0 – 13.6 |
||
| INR |
0.61–1.70 (1.7–11.1) ∗ |
0.53 – 1.11 (D30) |
|||
| Fibrinogen (g/l) |
1.5–3.73 |
1.6 – 4.2 (D5) |
1.5 – 4.14 |