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.
Oswestry instrument (sÂ·wesËÂ·trÄ inËÂ·strÂ·ment), n.pr in chiropractic medicine, a questionnaire used to monitor the progression of a patient throughout the treatment period. Specifically, this questionnaire evaluates changes in a patient's function and evaluates the patient's capability to perform day-to-day activities or the level of impairment occurring as a result of the spinal condition.