What is a normal cord gas?
Normal arterial blood cord gases values in a full-term newborn: Mean pH: 7.28 ± 0.07. Mean PCO2 (carbon dioxide): 49.9 ± 14.2 (mmHg) Mean PO2 (oxygen): 23.7 ± 10.0 (mmol/L) Mean base deficit: -3.6 ± 2.8 (mmol/L)
What are typical values for PO2 in fetal umbilical cord blood?
Cord Blood Gases
| BG Parameter | Umbilical Artery | Umbilical Vein |
|---|---|---|
| pO2 | 6.2 – 27.6 | 16.4 – 40.0 |
| pCO2 | 41.9 – 73.5 | 28.8 – 53.3 |
| Bicarbonate | 18.8 – 28.2 | 17.2 – 25.6 |
| Base Deficit | +9.3 to -1.5 | +8.3 to -2.6 |
What is fetal metabolic acidosis?
Fetal acidosis is a medical term that refers to high amounts of acid levels in an unborn baby’s blood. This typically occurs when a child is deprived of oxygen for an extended period of time during or after birth.
What is normal base deficit in newborn?
Normal arterial cord blood gases for a term newborn: PO2: 6 – 31 (mmHg) Base excess (BE): -8 – 0 (mmol/L); (Base deficit (BD): 0 – 8)
Will a hypoxic fetus have a metabolic acidosis?
3.3. In hypoxic conditions, lactate levels in subcutaneous tissues increase before pH decreases. Therefore, it appears to be an earlier marker of evolving metabolic acidosis [42].
What does blood gas tell you?
A blood gas test provides a precise measurement of the oxygen and carbon dioxide levels in your body. This can help your doctor determine how well your lungs and kidneys are working. This is a test that is most commonly used in the hospital setting to determine the management of acutely ill patients.
What is high base deficit?
HIE is a condition of brain/neurological dysfunction. Symptoms among affected neonates include hypotonia, poor feeding, respiratory difficulties, seizures and reduced level of consciousness.
How do you interpret the fetal blood sample result?
Interpretation of fetal blood sampling:
- pH: Normal: greater than or equal to 7.25. Borderline (repeat in 30 mins): 7.21 to 7.24. Abnormal (birth expedited): less than or equal to 7.20.
- Lactate: Normal: less than 4.2 mmol/L. Borderline (repeat in 30 mins): 4.2 to 4.8 mmol/L. Abnormal (birth expedited): greater than 4.8.
What does a low pH mean in a newborn?
A low pH could mean respiratory problems, with the baby suffering a lack of oxygen. This poses the risk – especially in small or premature babies – of hypoxia, the most common cause of brain damage.
How is fetal hypoxia diagnosed?
These tests can include prenatal testing, such as fetal movement and amniotic fluid levels, Doppler examination, or fetal heart rate. Another risk factor is premature birth in which medical intervention, such as premature birth prevention or C-section delivery, can be used as prevention for intrauterine hypoxia.