173 results found
Medical tests
… forms of thalassemia , may cause hemoglobin A levels to be low and hemoglobin F levels to be high. Hemoglobin F (fetal … in the normal range may still be normal for you. High and low values Higher-than-normal amounts of both hemoglobin A2 … F may mean a mild form of thalassemia is present. A very low level of hemoglobin A and a high level of hemoglobin F …
Medical tests
… B12 to use folate. So if vitamin B12 levels are very low, folate can't be used by the cells, and high levels of … is not a reliable way to test for a vitamin B12 deficiency. Low values Low folate levels can also mean that you have a problem …
Medical tests
… Wrap an elastic band around your upper arm to stop the flow of blood. This makes the veins below the band larger so it is easier to put a needle into the … a vein. You may get a small bruise at the site. You can lower the chance of bruising by keeping pressure on the site …
Medical tests
… substances through the blood. When prealbumin levels are lower than normal, it may be a sign of a poor diet … test to be sure that a poor diet is the reason for your low prealbumin levels. Why It Is Done A prealbumin blood … hospital or before and after surgery. Poor nutrition can slow healing and recovery. See how well supplements or …
Medical tests
… a thin viewing tool called an arthroscope, or scope. It allows the doctor to see the joint surfaces and the tough tissue that covers and cushions the ends of the bones (cartilage). The doctor can also see the surrounding … (which is done using a larger incision), arthroscopy allows your doctor to see what is wrong with your joint. But …
Medical tests
… by the intestines, and its level in blood and urine is low. Why It Is Done A test for D-xylose is done to: Check to … other foreign matter in the urine sample. You will not be allowed to eat until the test is completed. How It Feels … the amount of D-xylose in the blood and urine will be very low. Normal Each lab has a different range for what's …
Medical tests
… and electrolytes in the body. Find out if you have swallowed a poison, such as rubbing alcohol, wood alcohol, or … kidneys to lose water and produce large amounts of urine. Low values Low levels may be caused by: Too much water in the body. A …
Medical tests
… intestines stick out through the belly wall. Normally, low levels of AFP can be found in the blood of a pregnant woman. No AFP (or only a very low level) is generally found in the blood of healthy men or … a month or two before the woman gives birth, and then it slowly decreases. Values are generally slightly higher for …
Medical tests
… ovarian function before age 40 (premature ovarian failure). Low egg supply (ovarian reserve). Menopause has occurred. … values in children may mean that puberty is about to start. Low values Low FSH values may mean: A woman is not producing eggs …
Medical tests
… morning hours and are highest about 7 a.m. They drop very low in the evening and during the early phase of sleep. But … infection (sepsis) can cause high cortisol levels. Low values A low level of cortisol in the blood can be caused by: …
