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Introduction ⬇

Desaturated phosphatidylcholine (DSPC) is the major component (50%) of fetal pulmonary surfactant. The concentration in amniotic fluid can be measured by separating DSPC from unsaturated lecithin. Phosphatidylcholine is the second most surface-active component of surfactant.

This test is a direct measure of primary phospholipid in surfactant and is used in the assessment of FLM.

Procedure ⬆ ⬇

Obtain and examine amniotic fluid for the DSPC.

Clinical Implications ⬆ ⬇

  1. Normal levels are consistent with FLM and indicate a negligible risk for RDS.

  2. Low levels are associated with immaturity and a high risk for RDS.

Interventions ⬆ ⬇

Pretest Patient Care

  1. Explain test purpose and the amniotic fluid sampling procedure.

  2. Follow guidelines in Chapter 1 for safe, effective, informed pretest care.

Posttest Patient Care

  1. Review test results; report and record findings. Modify the nursing care plan as needed. Monitor the patient and counsel appropriately.

  2. Follow guidelines in Chapter 1 for safe, effective, informed posttest care.

Interfering Factors ⬆ ⬇

Results may be altered by changes in AFV (oligohydramnios or polyhydramnios).

Reference Values ⬆

Normal