Blood tests, necessary doses

Some studies are sometimes multiplied automatically: “It’s useless or even undesirable.” in May, the Academy of Pharmacy emphasizes. In her sight, certain doses of blood tests are given too often or systematically. Let’s sift through the doses of vitamin D, TSH, ferritin, and lipid profile that are usually given from the age of 50 years.

• Iron

Who is this study for? Paleness, tiredness, dizziness … “This dose is often given in any significant and unexplained tiredness, in young and stressed women, pregnant women, and postmenopausal women who may have anemia “ says Dr. Lionel Barrand, a medical biologist and president of the Syndicate of Young Medical Biologists. Frequency. There is no need to repeat this test every year, except in special cases or with proven anemia. The recommendations changed in 2017 because a full assessment (ferritin, iron, transferrin, and saturated) was over-assigned and too expensive. Now biologists first measure ferritin and, if it is normal, stop it.

• Vitamin D

Who is this study for? Fashion ” vitamin D testing is over! He was stopped by health insurance after the 2000-2011 these doses were multiplied by a hundred. 2014 its reimbursement was limited to very specific situations, such as suspicion of rickets or osteomalacia, bariatric surgery, falls in the elderly using certain treatments. … In postmenopausal women, the dose is no longer reimbursed risk of osteoporosis and fractures. “Doctors can continue to take vitamin D without dosing because malabsorption is rare,” said Professor Rémy Couderc, head of the biochemistry department at Trousseau Hospital in Paris. Frequency. Whether this is useful (or not) will be decided by your doctor and you will not need to repeat this blood test every year if, for example, treatment for osteoporosis is well balanced.

• TSH (thyroid stimulating hormone)

Who is this study for? This is the first blood test requested by a doctor who suspects hyperthyroidism or hypothyroidism. “This study is performed on subjects who have warning signs: fatigue, gastrointestinal disorders … or family history, but this is by no means a systematic check,” says Professor Couderc. It remains among the most expensive studies. Frequency. The physician decides on the frequency of the analysis based on the patient’s medical condition and medication. to Modification of the Levothyrox formula led, for example, to an increase in dose.

• Lipid profile

Who is this study for? “This assessment (total cholesterol, HDL, LDL cholesterol, and triglycerides) is given quite systematically to people over the age of 50,” says Dr. “In terms of public health, all men over the age of 40 and all women over the age of 50 had to have a lifetime lipid test to detect possible familial hypercholesterolemia,” said Professor Couderc. You do not need to do this every year if you do not have risk factors for the cardiovascular system (hypertension, overweight, etc.). Enough once every five years. However, assessments will be repeated in people with hypercholesterolemia.

• Stay true to your lab!

Do you know? It’s better to do that blood tests and other tests always in the same laboratory. Why? Because significant differences in results are sometimes observed between the two laboratories. “Immunochemical assays (ferritin, CRP, etc.) are very sensitive. Their results may vary, especially depending on the antibodies used,” explains Professor Coudercas.

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