Spirometry—You breathe into a mouthpiece connected to an instrument called a spirometer. The spirometer measures the volume of air that you can force out of your lungs in one second after having inhaled as much as you can. You will be asked to hold the tube of a spirometer in your mouth, inhale as much air as possible, and then blow out as hard as you can into the spirometer for one second. The amount of air you can force out is called your forced expiratory volume, or FEV1.
Lung volume: You breathe nitrogen or helium gas through a tube for a certain amount of time, and then the gas concentration in a chamber attached to the tube is measured.
Diffusion capacity—You breathe carbon monoxide for a very short time (often one breath). The concentration of carbon monoxide in the air you exhale is then measured. The difference in the amounts of carbon monoxide inhaled and exhaled shows how quickly gas can travel from your lungs into the blood.
PFTs are painless, and you will have time to rest between the different breathing measurements. The measurements may be repeated two or more times.
Pulse Oximetry
A pulse oximeter is a medical device that indirectly measures the oxygen saturation of a patient’s blood (as opposed to measuring oxygen saturation directly through a blood sample) and changes in blood volume in the skin, producing a photoplethysmograph. It is often attached to a medical monitor so staff can always see a patient’s oxygenation. Most monitors also display the heart rate.
A blood-oxygen monitor displays the percentage of arterial hemoglobin in the oxyhemoglobin configuration. Acceptable normal ranges are 95 to 100 percent, although values down to 90 percent are common. For a patient breathing room air, at not far above sea level, an arterial pO2 can be estimated from the blood-oxygen monitor SpO2 reading.
We also perform exercise pulse oximetry for Medicare patients needing to re-qualify for their home oxygen and evaluate a patient’s oxygen levels during exercise.
Coumadin Clinic
We offer an in-office Coumadin clinic for patients using Coumadin, Warfarin, Lovenox, and Fragmin. We perform a finger-stick PT/INR level check and consult with an RN.
