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Laboratory testing for preeclampsia: result trends and screening recommendations
A Ries1, J N Kopelman, C Macri
1Department of Obstetrics and Gynecology, National Naval Medical Center, Bethesda, MD 20889, USA.
Insights
Routine screening for preeclampsia should omit liver function and uric acid tests. Abnormal renal tests are common and warrant further investigation for preeclampsia diagnosis.
Area of Science:
- Obstetrics and Gynecology
- Clinical Chemistry
- Maternal-Fetal Medicine
Background:
- Preeclampsia screening relies on various laboratory tests.
- Current screening practices may not be optimally efficient.
- Understanding laboratory test trends is crucial for refining diagnostic approaches.
Purpose of the Study:
- To analyze laboratory test result trends in preeclampsia workup.
- To identify clinical characteristics associated with abnormal test results.
- To recommend an optimized laboratory screening regimen for preeclampsia.
Main Methods:
- Retrospective review of patients delivering between February and July 1996.
- Analysis of blood urea nitrogen, creatinine, liver enzymes, and uric acid levels.
- Correlation of laboratory abnormalities with clinical symptoms of preeclampsia.
Main Results:
- Low incidence of abnormal uric acid (6%) and liver enzyme (7%) tests.
- Most patients with abnormal liver or uric acid tests presented with classic preeclampsia symptoms.
- High rate of abnormalities observed in renal function tests (blood urea nitrogen and creatinine).
Conclusions:
- Liver function and uric acid tests are not recommended for routine preeclampsia screening.
- Renal function tests are valuable screening tools for preeclampsia.
- Further research is needed to explore the link between abnormal renal tests and preeclampsia progression.
Abstract:
To better direct screening for preeclampsia, we describe the result trends of the laboratory tests used in the workup of preeclampsia at our institution. The clinical characteristics of patients with abnormal test results are further detailed. The objective of the study is to recommend a laboratory screening regimen for preeclampsia based on the data. All patients who delivered at National Naval Medical Center from February to July 1996 who had blood urea nitrogen, creatinine, aspartate aminotransferase, alanine aminotransferase, or uric acid determinations as part of a workup for preeclampsia were identified. Results are reported, and the clinical characteristics of patients with abnormal tests were obtained from the medical record. Abnormalities of uric acid and liver enzymes were few in our patient population (6% and 7%, respectively). The majority of patients with abnormal uric acid and liver function tests had the classic clinical symptoms of preeclampsia; therefore, the laboratory data added little to the clinical diagnosis. There was a high rate of renal test abnormalities, necessitating further investigation. We recommend omitting liver function and uric acid testing in the routine screening for preeclampsia. The high incidence of abnormal renal tests warrants continued use of this screening test and, more importantly, further investigation into the relationship between abnormal renal tests and disease course.