SleepImage Enhances Report with CVHR Statistics & Sleep Transitions


Product Release
March 21, 2018

SleepImage V8.6.1 – Release Notes
Software Release Date: 2/14/18
 
Introduction
SleepImage proudly announces the release of a user interface to evaluate sleep fragmentation and Obstructive Sleep Apnea (OSA) on its Corporate platform. With this release, SleepImage continues to enhance product usability to help clinicians with sleep disorder evaluation to inform or drive clinical management. SleepImage is a user-friendly tool for accurately analyzing the balance of the Autonomic Nervous Systemduring sleep providing Clinicians objective and operator-independent data to make clinical decisions to diagnose or track treatment for patients suffering from a sleep disorder.
 
Sleep Disordered Breathing
Further to a release in 2017 of a Decision-Assist tool aimed at making it easier for clinicians to understand the relationship between the SleepImage output and the Apnea Hypopnea Index (AHI), this release adds numerical presentation of what has previously only been displayed as event markers called Cyclic Variation of Heart Rate (CVHR). CVHR is a known cardiovascular reaction to paused breathing. While CVHR events during unstable sleep predominantly demonstrate true apnea events that are presented through the Sleep Apnea Indicator (SAI), this release has added a numerical presentation of CVHR events that happen during the sleep period irrespective of whether it happens during stable or unstable sleep. The clinical usability of this is that the SAI is not meant to capture hypopnea periods, the CVHR during stable sleep correlates with hypopnea and arousal. The clinician can therefore now more accurately correlate the SleepImage output to both apnea and hypopnea events that would generally be scored from a Polysomnography (PSG) study. Based on clinical research and validation of the SleepImage output against the commonly used Apnea Hypopnea Index (AHI), the addition of presenting CVHR events both during unstable sleep and the entirety of CVHR during sleep will help aid clinical diagnosis for sleep apnea.
 
Sleep Disruption
With this release SleepImage is also presenting a table of sleep transitions. The SleepImage system is based on the bi-modality of sleep which can be stated simply that either the patient is awake or asleep; during sleep the patient is either in NREM or REM sleep and NREM sleep is either stable or unstable. As SleepImage establishes sleep quality through the Sleep Quality Index (SQI), seeing the transitions between these different states of sleep can further enhance clinical investigation into the patients’ sleep. Generally speaking, it is good to transition from unstable to stable sleep, while transitioning from stable to unstable sleep is less desirable. These changes to the SleepImage report are helpful for clinicians to identify underlying causes of disrupted sleep more precisely to provide better basis for clinical diagnosis or sleep disorder therapy management.
 
Upgrade requirements and other considerations
Current SleepImage customers with a Corporate account will automatically benefit from these upgrades. Both future study uploads as well as studies that have already been uploaded benefit from this release making it possible for clinicians to revisit previous evaluations or determinations using these new tools.

If you wish to discuss this, please contact us at:
sales@sleepimage.com for new customers, or
support@sleepimage.com for existing customers