Question

The nurse is caring for a patient with an acute myocardial infarction. Which of the following laboratory findings would MOST concern the nurse?

  • 1. Erythrocyte sedimentation rate (ESR)-10 mm/h.
  • 2. Hematocrit (Hct)-42%.
  • 3. Creatine kinase (CK)-350 U/ml.
  • 4. Serum glucose-100 mg/dL.

Answer

The new nursing supervisor for several units in the hospital surveys the physical structure of each setting. Which observations MOST concern the nurse?

1. Erythrocyte sedimentation rate (ESR)-10 mm/h.

ESR-rate at which RBCs settle out of unclotted blot in 1 h; indicates inflammation/necrosis; normal: men 0-15/h, woman: 1-20 mm/h

2. Hematocrit (Hct)-42%.

Relative volume of plasma to RBS; increased in dehydration; decreased with fluid volume excess; normal: men 40-45%, women: 37-45%.

3. Creatine kinase (CK)-350 U/ml.

CORRECT – enzyme specific to brain, myocardium and skeletal muscle; indicate tissue necrosis or injury; normal: men: 12-70 U/mL, women: 10-55 U/mL.

4. Serum glucose-100 mg/dL.

Indicates insulin production: normal: 60-110 mg/dL.

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