We use the Hybritech serum ICON hCG assay. A negative value represents <10
U/L. A radiographer quoted the 10 day rule, that if there was a LMP in the
last 10 days, then it is OK to presume the patient is not pregnant, but
wondered as to what we claim by a negative test when the LMP is uncertain,
and does one always accept the patient's information. Does anyone have an
agreed protocol with regard to radiological investigations in such
situations?
____________________________________________________________
Dr. Helen Grimes, Dept. of Clinical Biochemistry, UCH, Galway, Ireland
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