272 results found
Medical tests
… made longer by: Blood-thinning medicine, such as warfarin. Low levels of blood clotting factors. A change in the … to make sure you are taking the right dose. Check for low levels of blood clotting factors. The lack of some … so that the prothrombin time is longer than normal (by about 1.5 to 2.5 times the normal value or INR values 2 to 3). …
Medical tests
… viral load. This means that the amount of the virus is too low for the test to detect. When the virus is undetectable, … blood. It means that the amount of HIV in the blood was too low for the test to detect. CD4+ Cells … viral load. This means that the amount of the virus is too low for the test to detect. When the virus is undetectable, …
Medical tests
… test uses reflected sound waves to see how blood flows through a blood vessel. It helps doctors assess the blood flow through major arteries and veins, such as those of the … change in pitch of the sound waves to provide information about blood flow through a blood vessel. The doctor listens to …
Medical tests
… cause red blood cells to clump together (agglutinate) at low temperatures. Healthy people generally have low levels of cold agglutinins in their blood. But lymphoma … of cold agglutinins can destroy red blood cells throughout the body. This condition is called autoimmune hemolytic …
Medical tests
… a microscope for problems. This procedure usually takes about an hour. Why It Is Done This test is done to: Look for … blood count or clotting factors, before your procedure. Follow the instructions exactly about when to stop eating and drinking. If you don't, your procedure may be …
Medical tests
… upper arm. Counting your pulse rate is a simple way to find out how fast your heart is beating. Your doctor will usually check your pulse during a … exercise, have a fever, or are under stress. It will be slower when you are resting. Why It Is Done Your pulse is …
Medical tests
… collected: By a person coughing up mucus. By breathing in a saltwater (saline) mist and then coughing. During … doctor will tell you how soon before the procedure to stop eating and drinking. Follow the instructions exactly about when to stop eating and …
Medical tests
… Then a long, thin needle will be carefully inserted just below your breastbone. (In some cases, the needle is inserted … on the left side, over your heart.) The needle is then slowly pushed through the pericardial sac into the space … the space between the sac and your heart. The fluid drains out through the tube. Some fluid may be saved and sent to a …
Medical tests
… blood vessels. A cardiac catheterization can check blood flow in the coronary arteries. It also checks the function of … angiogram. Check on the pumping action of the heart. Find out if a congenital heart defect is present and how severe … Prepare Follow the instructions exactly about when to stop eating and drinking. If your doctor told you to take your …
Medical tests
… puts a long needle through your skin between two of your lower ribs on your right side. The needle goes into your … Check the response to treatment for liver disease. Find out if a medicine, such as methotrexate, is causing a toxic … own. Follow the instructions exactly about when to stop eating and drinking. If you don't, your procedure may be …
