Fetal Scalp Blood pH

This is a blood which measures the blood of the scalp of the fetus. It is used to help determine if the blood is too acidic. This would indicate the blood oxygen level may be too low.

PREPARATION FOR TEST

No preparation or fasting is necessary.

NORMAL FINDINGS

  • pH: 7.25-7.35

  • O2 saturation: 30% to 50%

  • PO2: 18-22 mm Hg

  • PCO2: 40-50 mm Hg

  • Base excess: 0 to -10 mEq/L

Ranges for normal findings may vary among different laboratories and hospitals. You should always check with your doctor after having lab work or other tests done to discuss the meaning of your test results and whether your values are considered within normal limits.

MEANING OF TEST

Your caregiver will go over the test results with you and discuss the importance and meaning of your results, as well as treatment options and the need for additional tests if necessary.

OBTAINING THE TEST RESULTS

It is your responsibility to obtain your test results. Ask the lab or department performing the test when and how you will get your results.