What to Expect with IONM

Your Medsurant Monitoring team is available to answer questions about testing and assist with billing, so you can focus on making a full recovery.

Letter to Patients

Dear Patient:

Your surgeon has requested that Medsurant Monitoring perform neurophysiologic intraoperative monitoring (IONM) for your upcoming surgery. IONM protects patients by continuously monitoring the nervous system (the brain, spinal cord, and nerves) when it is at risk during surgery. We are committed to providing high-quality information to your surgeon so that you receive high-quality care. As you prepare for this procedure, please note the following important information.

What to Expect with IONM

On the day of your surgery, a Medsurant Monitoring clinician will meet with you before you go into the operating room. We will take a medical history and examine the function of your nervous system. Then we prepare you for the surgery by attaching electrodes to your body that record changes in your nervous system in the area of the operation. This information allows your surgeon to keep track of your neurological status during the operation and to make quick decisions if there are significant changes in your nervous system.

Some patients need to have a test of the nervous system completed prior to the day of surgery. Your surgeon will inform you if this is necessary. Pre-operative tests are done in our office.

Billing for IONM

Please check with your insurance carrier prior to surgery to find out if IOM is covered in your insurance plan. You may be responsible for payment for any portion of the tests that are not covered by your insurance.

The tests we may perform during your surgery, and which may be included on your bill, are:

SSEPs—Somatosensory Evoked Potentials: This test can be done on the upper and lower extremities (e.g. arms or legs). SSEPs provide information about the sensory (feeling) tracts of the spinal cord and information about the sensory cortex of the brain.

TcMEPs—Transcranial Motor Evoked Potentials: This test monitors the muscles to provide information about the motor (movement) tracts of the spinal cord. TcMEPs can also provide information about the location of the motor cortex of the brain.

BAEPs or ABRs—Brainstem Auditory Evoked Potentials: BAEPs/ABRs provide information about the brainstem integrity (extension of the spinal cord containing motor, sensory, blood pressure, and breathing information) as well as the function of the auditory (hearing) system.

Motor NCS or Sensory NCS—Nerve conduction studies: NCS studies measure and record information about the rate of transmission of a signal (motor or sensory) through nerves outside the spinal cord and brain. The conduction rates can alert us to problems in these areas.

EEG—Electroencephalogram: EEGs record brain activity.

For Further Information

We are glad to be able to provide additional safety during your surgery through our state-of-the-art care. If you have any questions about our neurophysiologic intraoperative monitoring services, check out our list of Frequently Asked Questions (FAQs). Also, please feel free to contact us at 720-214-2549, or complete our online contact form.


The Medsurant Monitoring Team