Variation in Lab tetsing Flashcards
Physiological state changes may result in…
abnormal lab tests
Meals stimulate the production of…
Gastric acid
What happens to HCl, pH, and plasma chloride concentration when you eat?
- Decrease HCl
- Increases pH
- Decrease plasma Cl
What does glucose absorption do?
- Stimluates the release of insulin
- Insulin causes the uptake of K into cells
- Decreasing plasma K levels (hypokalemia)
Non-fasting samples may result in _____ test results?
Abnormal
When are the most reproducible test results obtained?
When the patient is fasting for 8-12 hours
What effects does stress have on test results?
Stress increases your BV, and then increased your BP
-Increased BV causes a dilution of plasma proteins
As a clinician, what should you do if your patient is under stress?
Don’t order elective testing if your patient is under stress
Describe the effects of exercising
Patients who exercise regularly have increased levels of plasma enzymes
What are examples of plasma enzymes?
- Creatinine kinase
- Asparate aminotransferase
- Lactate dehydrogenase
Where are plasma enzymes found?
The liver
What are high levels of plasma enzymes often confused with?
Liver disease
Describe cyclic variation
Reproducible patterns of alteration in physiologic state that occur at specific days, months, or year
What is an example of cyclic variation?
Pituitary hormones
What type of variation do pituitary hormones demonstrate?
Ultradian variation
