Sleep Disorders

Sleep Disorders & Apnea Testing

An in-lab sleep study, also known as a polysomnogram, records your brain waves, heartbeats and breathing as you sleep. It also charts your eye movements, limb movements and oxygen in your blood. Data collected during sleep studies help doctors diagnose sleep disorders in their patients and develop a treatment plan.

The Medical Challenge

All of the traditional monitoring sensors attached to the patient for sleep testing are painless and aside from the inconvenience of the physical connections to the monitoring equipment, are not felt by the patient after they fall asleep. As traditional methods for blood pressure monitoring perform an oscillometric test or “squeeze” of the arm to obtain a measurement, they are not used as this would disturb or potentially wake the patient during the sleep study. It is for this reason, that BP measurement during sleep testing are not done.

Caretaker Solution

The Caretaker4 is unique due to the fact that it uses a low-pressure finger cuff that provides continuous monitoring without disturbing r waking the patient. The ability to collect continuous BP readiings during a sleep disorder study provides a new source of valuable data previously unavailable to researchers to aid in the diagnosis and treatment of sleep disorders.

Medical References

Dr Younghoon Kwon MD

Cardiovascular and Critical Care Physician,
University of Virginia Health System


“In the Sleep Lab, we rely on a plethora of continuous physiological data like EEG, ECG, respiratory flows and SpO2, to diagnose sleep disorders (mainly sleep apnea), One very missing parameter that I and probably many other sleep clinicians have always wanted to measure during clinical sleep studies is BP. We all know that based on research, BP in sleep is an important yet underappreciated indicator of future cardiovascular risks and that it can be significantly affected by abnormal sleep such as sleep apnea. However, measuring BP has been obviously challenging in any setting including during sleep studies as typical BP monitors are too intrusive and sporadic. Using Caretaker’s novel, comfortable, low-pressure finger cuff, I’m able to get a Continuous, uninterrupted, measure of beat-by-beat blood pressure changes throughout sleep without wires, hoses, and cuffs that disturb the patient. Caretaker allows us to add probably the most wanted physiological parameter, BP, to sleep monitoring. I foresee that incorporation of BP measurement in sleep will become standard of care and provide clinicians with a much more enhanced tool to assess the burden of sleep apnea and its associated cardiovascular risks (Toward true personalized medicine in sleep disorder!)”

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