291 results found
Medical tests
… Test Overview A lactic acid test is a blood test that measures the level of lactic acid made in … for energy and makes lactic acid. Lactic acid levels get higher when strenuous exercise or other conditions—such as … oxygen throughout the body. Lactic acid levels can also get higher when the liver is severely damaged or diseased, …
Medical tests
… measures the amount of prostate-specific antigen in the blood. PSA is released into the blood by the prostate , … done to: Screen for prostate cancer. If your PSA level is higher than expected, your doctor may suggest other tests, … such as an enlarged prostate and prostatitis, can cause high PSA levels. Check if cancer may be present when results …
Medical tests
… When you feel stressed, these hormones increase heart rate, blood pressure, breathing rate, muscle strength, and mental … glands to release too many hormones. And that can cause high blood pressure, excessive sweating, headaches, fast … that isn't in the normal range may still be normal for you. High values High levels of free catecholamines, …
Medical tests
… (AST) test measures the amount of this enzyme in the blood. AST is normally found in red blood cells , liver , … severe damage, AST levels rise in 6 to 10 hours and remain high for about 4 days. The AST test may be done at the same … for you. Results are usually available within 12 hours. High values High levels of AST may be caused by: Liver …
Medical tests
… Test Overview During the first trimester of pregnancy, screening tests for birth defects may be done. … or trisomy 18 . First-trimester screening tests include: Blood tests. These measure the level of two substances in … a set of numbers. A positive result means that there is a higher-than-average chance that your baby has Down syndrome …
Medical tests
… test measures the level of the hormone gastrin in the blood. Gastrin is produced by cells, called G cells, in the … tract . Sometimes a test for gastrin is done after eating a high-protein diet or after receiving an injection of the … that isn't in the normal range may still be normal for you. High levels High gastrin levels may be caused by: …
Medical tests
… less is found in the urine. Kidney problems can cause high or low levels of phosphate in the urine. High levels of phosphate in the urine also may be caused by … not get toilet paper, pubic hair, stool (feces), menstrual blood, or anything else in your urine sample. How It Feels …
Medical tests
… protein test measures the total amount of protein in the blood. It also measures the amounts of two major groups of … for you. Results are usually available within 12 hours. High values High albumin levels may be caused by: Severe dehydration . …
Medical tests
… of chemicals dissolved in the liquid part (serum) of the blood. Chemicals that affect serum osmolality include … that isn't in the normal range may still be normal for you. High values High levels may be caused by: Too little water in the body ( …
Medical tests
… measures the amount of the amino acid homocysteine in the blood. Why It Is Done A homocysteine blood test is done to: … with you in relation to your symptoms and past health. High values High values of homocysteine may be caused by: Not getting …
