Overnight Oximetry

What is this test?

Pulse oximetry measures peripheral arterial oxygen saturation (SpO2) as a surrogate marker for tissue oxygenation. It has become the standard for continuous, noninvasive assessment of oxygenation and is often considered the “fifth vital sign”.

Pulse oximetry uses spectrophotometry to determine the proportion of hemoglobin that is saturated with oxygen (ie, oxygenated hemoglobin; oxyhemoglobin) in peripheral arterial blood. Light at two separate wavelengths illuminates oxygenated and deoxygenated hemoglobin in blood. The ratio of light absorbance between oxyhemoglobin and the sum of oxyhemoglobin plus deoxyhemoglobin is calculated and compared with previously calibrated direct measurements of arterial oxygen saturation (SaO2) to establish an estimated measure of peripheral arterial oxygen saturation (SpO2).

How will this test be scheduled?

Our staff will send your orders to a local DME company. You will receive a call from them within one week to schedule your overnight oximetry test.

Special Instructions to Prepare for your Test?

None, unless otherwise instructed by your physician.

Next Steps Following my Test.  When do I get my Result?

Your physician will review your results and will instruct the staff on next steps if the test is abnormal. If it is abnormal and additional testing, supplemental oxygen, or a change to your existing therapy is required, we will reach out to relay the next steps with you or schedule an appointment with your physician if necessary.

Of course, should you have any questions regarding this test please phone the office at 610-383-6033

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