Medical Surgical Cystic fibrosis #2

Question

The nurse receives the quantitative sweat chloride test back from the lab of her pediatric client. It reveals a chloride concentration of 45 mEq/L. Which action should the nurse take next?

Answers

  1. Report findings to the provider and prepare for a repeat test.
    • Rationale:

      This answer is correct because these results suggest the client has cystic fibrosis. The chloride concentration of sweat is less than 40 mEq/L. A chloride concentration of 40 to 60 mEq/L points to cystic fibrosis and a repeat test is performed. Chloride concentrations over 60 mEq/L indicates a positive result for cystic fibrosis.

  2. Report findings to the provider and prepare for cystic fibrosis education.
    • Rationale:

      This answer is not correct because the lab result does not indicate a positive test. The next action of the nurse should be to perform a repeat test before providing the client and parents with information on cystic fibrosis.

  3. Report findings to the provider and prepare the client for discharge.
    • Rationale:

      This answer is not correct because the lab result indicates another test is necessary. The nurse should prepare for another test, not discharge the client.

  4. Report findings to the provider and prepare for pulmonary function tests.
    • Rationale:

      This answer is not correct because the test is not a positive test. Pulmonary function tests provide evidence of abnormal small airway function.

Overview

A quantitative sweat chloride test is a test to diagnose cystic fibrosis. A chloride concentration of 40 to 60 mEq/L is highly suggestive of cystic fibrosis and a repeat test is necessary. Greater than 60 mEq/L is considered positive for cystic fibrosis.

Explanation

Learning Outcomes

A quantitative sweat chloride test is used to diagnose cystic fibrosis. The chloride concentration of sweat is less than 40 mEq/L. A chloride concentration of 40 to 60 mEq/L is highly suggestive of cystic fibrosis and a repeat test is necessary. The nurse should never assume a diagnosis based on a test that “suggests” a positive result. Greater than 60 mEq/L is considered positive for cystic fibrosis. Once the lab study reveals a positive result, the nurse can prepare for education.

Test Taking Tip

Being familiar with lab values for the proper diagnosing of diseases. These labs will help the student answer this question.

Video Rationale