131
edits
Changes
no edit summary
= ResMed =
== AutoSet ==
=== AutoSet for Her ===
The Link to the Original
'''https://academic.oup.com/sleep/article-pdf/38/11/1775/13690051/aasm.38.11.1775.pdf'''
----
= Philips Respironics =
== DreamStation ==
=== Auto CPAP algorithms ===
==== General behavior ====
The Auto algorithms are designed to keep upper airways open and provide optimal therapy pressure. Not only do they respond to obstructive events, they also proactively search for the lowest possible pressure needed by the patient.
When a patient experiences obstructive events such as apneas, hypopneas, flow limitations or vibratory snores, the DreamStation Auto algorithms increase pressure in response.
Analysis of the Flow will lead to the event being classified as obstructive or central and will generate the appropriate response.
When a pattern of obstructive events occur pressure increases to achieve airway patency.
If the device classifies the event as central pressure remains unchanged.
==== Flow Limitation ====
Flow Limitation is determined by evaluating 4 parameters of the patient's breathing - roundness, flatness, peak, and shape. If two of the four parameters fall out of trend it is considered a flow limitation. If a flow limitation is detected a high pressure search is initiated in which pressure is gradually increased. Note: BiPap devices respond with IPAP.
==== Vibratory Snore (VS) ====
During a vibratory snore pressure vibrations are detected.
If 3 vibratory snores are detected within 1 minute with less than 30 seconds between snores the algorithm increases pressure by 1cn over 15 seconds.
Note that for BiPAP devices these events will create a response for EPAP.
==== Apnea (obstructive or central) ====
An apnea is the absence or reduction of patient airflow by at least 80% for 10 seconds or more.
If 2 obstructive airway apneas/hypopneas are detected within 3 minutes the algorithm increases pressure by 1 cm.
Note BiPAP devices will create a response to obstructive events with EPAP. CPAP or BiPAP devices do not respond to central apneas.
==== Hypopnea (H) ====
A Hypopnea is the reduction of patient air flow by at least 40% for 10 seconds or more.
If 2 obstructive airway apneas/hypopneas are detected within 3 minutes the algorithm increases pressure by 1 cm.
Note: BiPAP devices will create a response with IPAP.
==== Respiratory Effort Related Arousal (RERA) ====
A RERA is a sequence of breaths that exhibit both a subtle reduction in airflow during a 10 second period and a progressive increase in flow limitation. If a breath sequence is terminated by a sudden increase in air flow (along with the elimination of flow limitation a RERA is indicated.
If 2 RERA events are detected within 3 minutes pressure is increased by 0.5cm.
==== Periodic breathing ====
Periodic breathing such as Cheyne-Stokes Respiration (CSR) is defined as alternating periods of hyperventilation with waxing and wanning tidal volume and periods of central hypopneas and apneas.
No therapy adjustments are made in response to periodic breathing.
Donate to Apnea Board
