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The Mayo Clinic Health System Franciscan Healthcare Sleep Disorders Center employs a wide variety of diagnostic tools to assess your breathing and sleep difficulties.
The Center offers the following diagnostic services:
Electroencephalogram (EEG): These procedures are part of a work-up for patients experiencing some of the following symptoms: headaches, numbness, weakness, strokes, head injuries, tumors, seizures.
EEG with video monitoring: These procedures allow the patient to be monitored on the EEG machine at the same time they are being video recorded. During play back the physician can watch the patient at the same time the EEG is being played on a separate screen, allowing for absolute correlation of the patients clinical symptoms with the electrographic response of the brain. The patients who are monitored in this fashion are usually monitored for greater than four hours, and may sometimes be monitored for days. Long term video monitoring allows the physician to differentiate between different types of seizures, to assess the behavioral/clinical symptoms of seizures, movement disorders, etc.
Ambulatory EEG: An ambulatory EEG machine is small enough for the patients to carry or place by their bedside. Once the electrodes have been attached, patients can be monitored on the EEG machine while they are at home, work or school or performing most normal daily activities, including sleeping at night.
Evoked potentials: Electrodes are applied to monitor visual, auditory and nerve pathways. These procedures are used to help assess brain and brainstem function. Patients who are sent for evoked potential testing may be experiencing clinical symptoms/problems similar to those referred for EEGs. Frequent symptoms experienced by patients having these procedures are dizziness, tinnitus, loss of balance, loss of vision, loss of sensation.
Evoked potential monitoring during surgery: Evoked potentials may be monitored during some types of surgery, specifically during higher risk spinal surgeries for fusions or decompressions, and during some craniotomies. Evoked potential monitoring during surgery gives the surgeon important information regarding sensory/motor pathways in the brain and spinal cord, and can be a valuable tool to help assure desirable outcomes/lack of deficits from surgery.
EEG monitoring during surgery: EEG monitoring during surgery is offered as a tool during such procedures as carotid endarterectomies. It helps provide assurance to the surgeon that the patients circulation to the brain remains within normal limits during the surgery.
Polysomnogram: A polysomnogram (PSG) is a sleep study that will monitor sleeping patterns. A technologist will apply electrodes/wires on various parts of the body. Bedtime for each patient is kept as close as possible to each patients normal bedtime. If sleep apnea is noted by the sleep technologist during the night, a device called Positive Air Pressure (PAP) may be used to keep the air passage open and enable breathing to continue throughout the night.
Multiple sleep latency test (MSLT): A MSLT is a series of nap opportunities throughout the day. The test is most often used to determine if narcolepsy is present and provide a measure of sleepiness for patients experiencing excessive daytime sleepiness. This procedure is similar to a polysomnogram and is most often performed the day following a PSG. A technologist applies sensors and electrodes that will help determine sleep and wakefulness. Nap opportunities will be at two-hour intervals.
Maintenance of wakefulness test (MWT): An MWT is a series of trials to assess the ability to remain awake in a non-stimulating environment. Patients typically sit in a recliner for the trial periods. A technologist applies sensors and electrodes that will help determine wakefulness. Trials will be performed at two-hour intervals.
Actigraphy: Actigraphy provides a means for clinicians to measure activity and study sleep quality. It requires patients to wear an actigraph unit that closely resembles a wrist watch. The actigraph unit is worn continuously for an extended period of time. The collected data is downloaded and analyzed to determine wake-sleep patterns.
Our center is accredited by American Academy of Sleep Medicine and the American Board of Registrations of Electroencephalographic and Evoked Potential Technologists Incorporated. All center technologists are registered in a minimum of two fields of Neurodiagnostics and/or Polysomnography.Sleep Medicine services are available in Arcadia, Prairie du Chien, Sparta and Tomah via facility-to-facility video visits. Learn more about facility-to-facility video visits.