303 results found
Medical tests
… Most of it is made by muscle tissue and red blood cells . When the oxygen level in the body is normal, carbohydrate breaks down into water and carbon dioxide. When the oxygen level is low, carbohydrate breaks down for … energy and makes lactic acid. Lactic acid levels get higher when strenuous exercise or other conditions—such as heart …
Medical tests
… can cause blood to clump in blood vessels under the skin when the skin is exposed to the cold. This causes pale skin … and numbness in the hands and feet. The symptoms go away when the skin warms up. In some cases, the clumped blood … to take a blood sample, usually from the arm. How It Feels When a blood sample is taken, you may feel nothing at all …
Medical tests
… of ammonia in the blood. Most ammonia in the body forms when protein is broken down by bacteria in the intestines . … then eliminated in urine. Ammonia levels in the blood rise when the liver is not able to convert ammonia to urea. This … is done to: Check how well the liver is working, especially when symptoms of confusion, excessive sleepiness, coma, or …
Medical tests
… This procedure is not often done. It is sometimes done: When a child has severe earache, fever, and signs that an ear infection is not getting better with treatment. When there are signs that a child has serious complications from an ear infection. When an ear infection is suspected in a newborn or in a …
Medical tests
… baby's heartbeat patterns. It can show heart rate changes when the baby moves. It also shows changes when you have contractions, if you're having them. A fetal heart rate that speeds up when the baby moves means the baby is getting enough oxygen. …
Medical tests
… to see if your baby will stay healthy during contractions when you are in labour. This test includes external fetal heart monitoring . The test is done when you are 34 or more weeks pregnant. During a … to: Find out if your baby will stay healthy during labour, when contractions reduce the oxygen levels. Check to see if …
Medical tests
… antibody syndrome or lupus anticoagulant syndrome develop when the immune system makes antibodies that attack blood … done for this purpose, an APTT may be done every few hours. When the correct dose of medicine is found, you will not … to take a blood sample, usually from the arm. How It Feels When a blood sample is taken, you may feel nothing at all …
Medical tests
… such as transferrin or ferritin, or stored in body tissues. When red blood cells die, their iron is released and carried … for pregnancy, during breastfeeding, or at times when there are low levels of iron in the body (such as after … to take a blood sample, usually from the arm. How It Feels When a blood sample is taken, you may feel nothing at all …
Medical tests
… levels of both renin and aldosterone are normally present when the body is trying to conserve fluid and salt (sodium). When a tumour that makes aldosterone is present, your … level will be low. Usually a renin activity test is done when the aldosterone level is measured. Why It Is Done An …
Medical tests
… good at keeping its temperature within a safe range, even when temperatures outside the body change a lot. When you are too hot, the blood vessels in your skin widen … to sweat. As the sweat evaporates, it helps cool your body. When you are too cold, your blood vessels narrow. This …
