| Summary: | Aim: Physicians and
patients may have varying preferences for optimal blood analysis time. We aimed
to determine the tendency for the optimal blood analysis time of the physicians
and patients and also to determine the difference in some commonly used
biochemical and hematological parameters, between fasting and food intake. Methods: Questionnaire and cross-sectional designs were used. The doctors and patients
were conducted to a survey about the appropriate time for blood tests before
the study. 112 patients were included in study. Blood samples were collected
after 8-10 hours of fasting and 2 hours after 600-700 calories lunch. Blood
creatinine, alanine aminotransferase, sodium, glucose, calcium, albumin, total
cholesterol, triglyceride, HDL, LDL, alkaline phosphatase, total bilirubin, lactate
dehydrogenase, complete blood count, erythrocyte sedimentation rate, prothrombin
time and TSH were studied and the values were compared.Results: In our
survey, 75% of patients (54 patients in the outpatient clinic and 98 patients
in the blood collection unit, a total of 152) and 77% of doctors were thinking
that fasting was the appropriate time for blood tests. There were significant
increase in glucose (p<0.01), triglyceride (p<0.01) and platelets (p=0.035)
and significant decrease in sodium (p=0.01) after the food intake. There was no
statistically significant difference in the other parameters.
Conclusion: The
majority of physicians and patients had the opinion that blood tests should be
given in fasting. Although there were significant differences in glucose, triglyceride, thrombocyte and sodium levels in our study, thrombocyte and sodium differences
may not exhibit any clinical importance. Notwithstanding, high postprandial
levels of glucose and triglyceride are valuable indicators for cardiovascular
disease and diabetes risk.
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