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Capillary blood glucose screening for gestational diabetes: a preliminary investigation.

Abstract
Home glucose monitoring with the use of reflectance meters is an important adjunct in the care of pregnant women with insulin-dependent diabetes. The accuracy of reflectance meters for the assay of capillary glucose specimens has been well documented. The present preliminary study was undertaken to determine the utility of outpatient screening for gestational diabetes mellitus with the use of a reflectance meter (Accu-Chek, Boehringer Mannheim Co.). One hundred twenty-five patients in our high-risk practice had a standard 50 gm glucose load at 26 to 28 weeks' gestation. Capillary glucose values were measured on site with the Accu-Chek. Venous plasma glucose levels were measured by the central laboratory chemistry analyzer. While the laboratory (x) and meter (y) glucose determinations between the two sets of values were highly correlated (R = 0.89, p less than 0.001), there was a significant difference in their average values (x = 111.74, y = 136.35, p less than 0.0001). With the use of a receiver operator characteristic curve, a meter value of 160 mg/dl was determined as the optimal threshold for performing a 3-hour glucose tolerance test. The sensitivity and specificity with the use of a meter value of 160 mg/dl were 93% and 96%, respectively, for detecting an abnormal screening test in venous plasma (greater than or equal to 135 mg/dl). A total of 32 glucose tolerance tests were performed, with four patients included who had venous values less than 135 mg/dl. All eight patients with gestational diabetes mellitus were correctly identified. These data suggest that a glucose reflectance meter can be used for accurate outpatient screening of gestational diabetes mellitus. The potential advantages of capillary blood glucose screening include both cost and efficiency. Patients with abnormal screening values can be promptly identified and scheduled for a follow-up 3-hour glucose tolerance test.
AuthorsM B Landon, G S Cembrowski, S G Gabbe
JournalAmerican journal of obstetrics and gynecology (Am J Obstet Gynecol) Vol. 155 Issue 4 Pg. 717-21 (Oct 1986) ISSN: 0002-9378 [Print] UNITED STATES
PMID3766624 (Publication Type: Comparative Study, Journal Article)
Chemical References
  • Blood Glucose
Topics
  • Blood Glucose (analysis)
  • Blood Specimen Collection (methods)
  • Capillaries
  • Female
  • Glucose Tolerance Test
  • Humans
  • Monitoring, Physiologic (instrumentation)
  • Pregnancy
  • Pregnancy in Diabetics (blood, diagnosis)
  • Self Care
  • Veins

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