Arterial Blood Gases. Test Overview. An arterial blood gas (ABG) test measures the acidity (pH) and the levels of oxygen and carbon dioxide in the blood from an artery. This test is used to check how well your lungs are able to move oxygen into the blood and remove carbon dioxide from the blood.
How Often the Test Is Done During Your Pregnancy. Your doctor may use the Doppler often to listen to your baby's heartbeat during routine checkups, starting at about 8 to 10 weeks. Handheld Dopplers will not work quite this early.
Echocardiography is a simple and painless procedure that uses. sound waves to take âpicturesâ of your heart. WE Treatents + ests. by heart. â¢ Sound waves will pick up images as explained above. â¢ When the test is finished, the cardiologist will gently. pull the probe out.