An infant has tetralogy of Fallot. In reviewing the record, what ...

[wenmo]

An infant has tetralogy of Fallot. In reviewing the record, what laboratory result should the nurse expect to be documented?
 
  a. Leukopenia
  b. Polycythemia
  c. Anemia
  d. Increased platelet level

Question 2

A child with heart failure is on Lanoxin (digoxin). The laboratory value a nurse must closely monitor is which?
 
  a. Serum sodium
  b. Serum potassium
  c. Serum glucose
  d. Serum chloride

[jackie]

Answer to Question 1

ANS: B
Persistent hypoxemia that occurs with tetralogy of Fallot stimulates erythropoiesis, which results in polycythemia, an increased number of red blood cells.

Answer to Question 2

ANS: B
A fall in the serum potassium level enhances the effects of digoxin, increasing the risk of digoxin toxicity. Increased serum potassium levels diminish digoxin's effect. Therefore, serum potassium levels (normal range, 3.55.5 mmol/L) must be carefully monitored.