The nurse needs to obtain blood for ongoing assessment of a ...

[jCorn1234]

The nurse needs to obtain blood for ongoing assessment of a high-risk newborn's progress. Which tests should the nurse monitor? (Select all that apply.)
 
  a. Blood glucose
  b. Complete blood count (CBC)
  c. Calcium
  d. Serum electrolytes
  e. Neonatal prothrombin time (PTT)

Question 2

The screening test for PKU is most reliable if the blood sample is:
 
  a. from cord blood.
  b. taken 14 days after birth.
  c. taken before oral feedings are initiated.
  d. fresh blood from the heel.

[wshriver]

Answer to Question 1

ANS: A, C, D
The most common blood tests done on high-risk newborns are blood glucose, bilirubin, calcium, hematocrit, serum electrolytes, and blood gases. Hematocrits rather than CBCs are performed. This will monitor the red cell volume. Neonatal prothrombin time (PTT) is not a test.

Answer to Question 2

ANS: D
Fresh heel-stick blood is the preferred source for the test. Fresh heel-stick blood, not cord blood, must be used. The test must be performed soon after birth so that a low-phenylalanine diet can be instituted if required. The newborn should ingest breast milk or formula before the test is performed.