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== Justifying ASV ==
 
== Justifying ASV ==
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ASV or [[Adaptive servo-ventilation (ASV)]]
 
  
−
For Complex Sleep Apnea
+
'''Note:''' Much of the material in this article (especially in relation to Medicare requirements) is relevant to the United States only.
−
* Titrate to minimize OSA (obstructive AHI less than 5 per hour)
 
−
* Record the central apnea-central hypopnea index (CAHI) (looking for greater than or equal to 5 per hour and greater than 50% of total AHI)
 
−
* Document the presence of at least one of the following symptoms: 
 
−
** Sleepiness,
 
−
** Awakening short of breath,
 
−
** Difficulty initiating or maintaining sleep,
 
−
** frequent awakenings, or
 
−
** nonrestorative sleep,
 
−
** Snoring,
 
−
** Witnessed apneas
 
  
−
For Central Sleep Apnea
+
It is very likely that you are here because someone referred you here because after reviewing your [[OSCAR]] daily charts and/or your Sleep Studies they felt that you are a candidate for an Advanced PAP machine such as one of the Bi-Levels. There are two paths to treatment and the choice is yours.
−
* Document a ''central apnea-central hypopnea index (CAHI) is greater than or equal to 5 per hour''' also apnea-hypopnea index '''(AHI) greater than 5'''
 
−
* Document The sum total of '''central apneas plus central hypopneas is greater than 50% of the total apneas and hypopneas'''
 
−
* Document the presence of at least one of the following symptoms: 
 
−
** Sleepiness,
 
−
** Awakening short of breath,
 
−
** Difficulty initiating or maintaining sleep,
 
−
** frequent awakenings, or
 
−
** nonrestorative sleep,
 
−
** Snoring,
 
−
** Witnessed apneas
 
  
−
'''Central sleep apnea (CSA)''' is defined as:
+
'''Path 1:''' The path that you were thrown into whether you realize it or not.  That is to treat your apnea, whatever types of apnea that you have, with the machine they gave you, a CPAP, preferable an auto-CPAP either the ResMed or the Philips Respironics machines.  New members of the forum come here looking for help with intractable apnea and discomfort from these problems. The forum members and "gurus" are very good at optimizing therapy to reduce these problems, and increase comfort with the therapy.
−
# An apnea-hypopnea index '''(AHI) greater than 5''', and
 
−
# The sum total of '''central apneas plus central hypopneas is greater than 50% of the total apneas and  hypopneas''', and
 
−
# A '''central apnea-central hypopnea index (CAHI) is greater than or equal to 5 per hour''', and
 
−
# The presence of at least one of the following:  Sleepiness, Awakening short of breath, Difficulty initiating or maintaining sleep, frequent awakenings, or nonrestorative sleep, Snoring, Witnessed apneas
 
−
# There is no evidence of daytime or nocturnal hypoventilation
 
  
−
'''Complex sleep apnea (CompSA)''' is a form of central apnea specifically identified by all of the following:
+
'''Path 2:''' Take the often difficult and lengthy journey to procure an advanced PAP machine. The new member that has been advised they have central or complex apnea needs to be aware that optimizing may provide significant immediate relief from symptoms and improve AHI, but improved therapy results can '''disqualify them from higher levels of therapy''' (ASV), that might be possible without this self-optimization.  Sometimes individuals resolve central and complex apnea with CPAP and find long-term comfort, however, if results are inconsistent, or produce good AHI but not comfort or relief from other symptoms, The forum optimization should be '''discontinued as soon as possible to avoid disqualification from higher levels of therapy.''' This path frequently requires failing at CPAP, then failing at BiLevel E0470, before succeeding at ASV E0471
−
# With use of a positive airway pressure device without a backup rate (E0601 (CPAP) or E0470 BiLevel/BiPAP wo Backup), the polysomnogram (PSG) shows a pattern of apneas and hypopneas that demonstrates the  persistence or emergence of central apneas or central hypopneas upon exposure to CPAP (E0601)  or a bi-level device without backup rate (E0470) device when titrated to the point where obstructive events have been effectively treated (obstructive AHI less than 5 per hour).
 
−
# '''After resolution of the obstructive events''', the sum total of central apneas plus central hypopneas is greater than 50% of the total apneas and hypopneas; and
 
−
# '''After resolution of the obstructive events''', a central apnea-central hypopnea index (CAHI) greater than or equal to 5 per hour.
 
  
 +
'''ASV or [[Adaptive servo-ventilation (ASV)]]'''
 +
The below is based on Medicare Requirements for procuring
 +
* E0470 - RESPIRATORY ASSIST DEVICE, BI-LEVEL PRESSURE CAPABILITY, WITHOUT BACKUP RATE FEATURE, USED WITH NONINVASIVE INTERFACE, E.G., NASAL OR FACIAL MASK (INTERMITTENT ASSIST DEVICE WITH CONTINUOUS POSITIVE AIRWAY PRESSURE DEVICE) ''(Similar to '''ResMed Aircurve 10 VAuto''')''
 +
* E0471 - RESPIRATORY ASSIST DEVICE, BI-LEVEL PRESSURE CAPABILITY, WITH BACK-UP RATE FEATURE, USED WITH NONINVASIVE INTERFACE, E.G., NASAL OR FACIAL MASK (INTERMITTENT ASSIST DEVICE WITH CONTINUOUS POSITIVE AiRWAY PRESSURE DEVICE) ''(Similar to '''ResMed Aircurve 10 ASV or ResMed Aircurve 10 ST/A''')''
  
−
[[Central sleep apnea (CSA)|Central Sleep Apnea (CSA)]] is the cessation of respiratory effort result in a lack of respiratory movements. During sleep, your breathing is disrupted regularly because of how your brain functions, your brain simply doesn't tell your body to breathe, and therefore you don't try to breathe.
+
=== Complex Sleep Apnea ===
 +
For [[Complex sleep apnea|Complex Sleep Apnea]] the Medicare requirements for issuing an ASV machine.
 +
* Therapy Optimization should be discontinued and the original settings, from the doctor, restored.
 +
* Titrate to minimize OSA, that is the obstructive AHI to less than 5 per hour.  '''''This typically is raising EPAP or pressure until obstructive AHI is less than 5 per hour, we expect this to make the Central and Complex Apnea worse thus failing the current treatment'''''
 +
* Record the central apnea-central hypopnea index (CAHI) (looking for greater than or equal to 5 per hour and greater than 50% of total AHI)
 +
* Document the presence of at least one of the following symptoms: '''''These symptoms are specifically noted by Medicare. These are key symptoms that we look for by asking "How do you feel?". Do not limit your answers to the following and do not fabricate the answers.'''''
 +
#  Sleepiness, '''''"How do you feel?"'''''
 +
#  Awakening short of breath,  '''''"How do you feel?"'''''
 +
#  Difficulty initiating or maintaining sleep, '''''"How do you feel?"'''''
 +
#  Frequent awakenings, or  '''''"How do you feel?"'''''
 +
#  Nonrestorative sleep, '''''"How do you feel?" Nonrestorative sleep is defined as the subjective feeling that sleep has been insufficiently refreshing'''''
 +
#  Snoring, '''''Can be documented on OSCAR'''''
 +
#  Witnessed apneas '''''Most of us have this one with our significant others''
 +
'''
  
−
* [[Obstructive sleep apnea (OSA)|Apnea]]: 80% to 100% reduction in airflow for >= 10 seconds
+
=== For Central Sleep Apnea ===
−
* [[Hypopnea]]: 50% to 80% reduction in airflow for >= 10 seconds
+
For [[Central sleep apnea (CSA)|Central Sleep Apnea]] the Medicare requirements for issuing an ASV machine.
−
* [[Flow Limitation]]: <50% reduction in airflow for >= 10 seconds
+
* Therapy Optimization should be discontinued and the original settings, from the doctor, restored.
 +
* Document a ''central apnea-central hypopnea index (CAHI) is greater than or equal to 5 per hour''' also apnea-hypopnea index '''(AHI) greater than 5'''
 +
* Document The sum total of '''central apneas plus central hypopneas is greater than 50% of the total apneas and hypopneas'''
 +
* Document the presence of at least one of the following symptoms: '''''These symptoms are specifically noted by Medicare. These are key symptoms that we look for by asking "How do you feel?". Do not limit your answers to the following and do not fabricate the answers.'''''
 +
#  Sleepiness, '''''"How do you feel?"'''''
 +
#  Awakening short of breath,  '''''"How do you feel?"'''''
 +
#  Difficulty initiating or maintaining sleep,  '''''"How do you feel?"'''''
 +
#  Frequent awakenings, or  '''''"How do you feel?"'''''
 +
#  Nonrestorative sleep,  '''''"How do you feel?" Nonrestorative sleep is defined as the subjective feeling that sleep has been insufficiently refreshing'''''
 +
#  Snoring, '''''Can be documented on OSCAR'''''
 +
#  Witnessed apneas '''''Most of us have this one with our significant others'''''
  
−
=== Five types of Central Sleep Apnea ===
 
−
per the ''[https://www.mayoclinic.org/diseases-conditions/central-sleep-apnea/symptoms-causes/syc-20352109 Mayo Clinic]''
 
−
Central sleep apnea occurs when your brain fails to transmit signals to your breathing muscles.
 
−
Central sleep apnea can be caused by a number of conditions that affect the ability of your brainstem — which links your brain to your spinal cord and controls many functions such as heart rate and breathing — to control your breathing. The cause varies with the type of central sleep apnea you have.
 
  
−
Types include:
 
−
* Cheyne-Stokes breathing. This type of central sleep apnea is most commonly associated with congestive heart failure or stroke. This condition is characterized by a gradual increase and then decrease in breathing effort and airflow. During the weakest breathing effort, a total lack of airflow (central sleep apnea) can occur.
 
−
* Drug-induced apnea. Taking certain medications such as opioids — including morphine sulfate (Ms Contin, others), oxycodone (Oxycodone HCL, Oxycontin, others) or codeine sulfate — may cause your breathing to become irregular, to increase and decrease in a regular pattern, or to temporarily stop completely.
 
−
* High-altitude periodic breathing. A Cheyne-Stokes breathing pattern may occur if you're exposed to a very high altitude. The change in oxygen at this altitude is the reason for the alternating rapid breathing (hyperventilation) and underbreathing.
 
−
* Complex sleep apnea. Some people with obstructive sleep apnea develop central sleep apnea while using continuous positive airway pressure (CPAP) for their sleep apnea treatment. This condition is known as complex sleep apnea because it's a combination of obstructive and central sleep apneas.
 
−
* Medical condition-induced central sleep apnea. Several medical conditions may give rise to central sleep apnea of the non-Cheyne-Stokes variety.
 
−
* Idiopathic (primary) central sleep apnea. The cause of this uncommon type of central sleep apnea isn't known.
 
  
−
=== Diagnosis of Central Apnea ===
+
[[File:Respiratory-Assist-Device-Order-Template-Draft-20180412-R10b.pdf|thumb|center]]<br />
−
# Must have clinical symptoms to make the diagnosis - Sleepiness, insomnia, snoring, apneas, awakening with Shortness of Breath, A‐fib, CHF, or neurological disorder (such as stroke, MS)
+
[[File:Mr_checklist_rad_e0471.pdf|thumb|center]]
−
# Central AHI >5
 
−
# Central apneas and Central hypopneas >50% of total AHI
 
−
# Not better explained by another sleep disorder
 
−
''[http://www.apneaboard.com/CSA-and-ASV-Updated-Morgan.pdf CSA and ASV Updated Morgan]''
 
−
 
 
−
=== Hypopneas - Obstructive and Central ===
 
−
 
 
−
To determine the statistics for Central apneas and Central hypopneas >50% of total AHI above we need to determine which hypopneas are central in nature.
 
−
The description below defines the difference between obstructive and central hypopneas.
 
−
 
 
−
An obstructive hypopnea contains one or more of the following:
 
−
# An increase in PAP flow signal
 
−
# Snoring during the event
 
−
# Paradoxical breathing
 
−
 
 
−
A central hypopnea will have none of the above.
 
−
 
 
−
Central Hypopnea. Central hypopneas are associated with reductions of purely in-phase thoracic and abdominal effort or movement signals, followed by an increase in chest and belly movements at the end. There is no evidence of phase shifting or paradoxical breathing, no airflow flattening, and no snoring throughout the entire central hypopnea.
 
−
 
 
−
A Central AHI is composed of Central Apnea and Central Hypopnea.
 
−
The Central Apnea numbers are easily extracted from modern PAP machines which report detailed efficacy data. We need to concentrate on Central Hypopnea numbers to demonstrate a '''Central AHI >5''' and that '''Central apneas and Central hypopneas >50% of total AHI'''
 
−
 
 
−
 
 
−
Central Hypopnea. Central hypopneas are associated with reductions of purely in-phase thoracic and abdominal effort or movement signals, followed by an increase in chest and belly movements at the end. There is no evidence of phase shifting or paradoxical breathing, no airflow flattening, and no snoring throughout the entire central hypopnea.
 
−
 
 
−
Paradoxical Breathing explanation: The chest and abdomen should expand when they inhale and contract when they exhale. If the chest and abdomen contract while inhaling and expand while breathing out, a person may have paradoxical breathing.
 
−
 
 
−
=== Charts identifying Central Hypopneas ===
 
−
 
 
−
=== Failed Sleep Studies ===
 
−
Demonstrations of significant Central Apneas at Trial pressures<br />
 
−
 
 
−
[[File:SD-Bipap-Study-ASV-Justify-pg1.jpg|350px]]
 
−
[[File:SD-Bipap-Study-ASV-Justify-pg2.jpg|350px]]
 
−
[[File:SD-Bipap-Study-ASV-Justify-pg3.jpg|350px]]
 
−
[[File:SD-Bipap-Study-ASV-Justify-pg4.jpg|350px]]
 
−
[[File:SD-Bipap-Study-ASV-Justify-pg5.jpg|350px]]
 
−
[[File:SD-Bipap-Study-ASV-Justify-pg6.jpg|350px]]  
 
−
[[File:SD-Bipap-Study-ASV-Justify-pg7.jpg|350px]]
 
−
 
 
−
 
 
−
Although the conclusion of your study is severe obstructive apnea, your diagnostic study before PAP shows predominately central apnea, but enough OA that this would lead to a likely diagnosis of complex or mixed apnea in the severe range. Central events were more numerous and longer in duration than obstructive, with an event actually going more than 1-1/2 minutes. Bet you couldn't hold your breath that long if your were awake! Your BiPAP titration did reduce OA and helped significantly with your sleep architecture and some of the effects of apnea such as snoring; however, the report concedes you continue to have CA. The CA "improved" with final pressure but was not resolved.
 
−
 
 
−
A glance at the charts on page 4 shows that at the beginning of the night you had predominately OA events. You seemed to do pretty good at CPAP pressure of 11/11 for about 15 minutes during N2 sleep. They moved you to 16/12 bipap during a wake period that transitioned to N2 sleep. They then dropped pressure to 10/6 and you immediately had abundant CA, which transitioned to OA and back to CA as bipap pressure increased. A 15 minute period at 14/9 just after 1:00 had no apnea, but you were recorded as awake. Pressure increased to 15/10 then 19/14 with a brief drop-out of events. It appears that this period may be the basis of your titrated BiPAP pressure.
 
−
 
 
−
My impression is that you are headed for ASV (hopefully soon). This titration shows you were not successfully treated at any of the pressures attempted, and no trial lasted longer than 15 minutes. Your BiPAP titration is the best compromise found, with none being in a range that would be considered effective. Your results since the titration demonstrate that you will not succeed at bilevel without a backup to treat centrals, and your treated complex apnea remains in the high moderate to severe range. The titration study tells me, that there is not an effective pressure range any of us can recommend to you that will result in an acceptable AHI for any long-term.
 
−
 
 
−
I'm sorry to say, there is nothing I can suggest to improve your results other than you need to be sure your doctor is aware that you continue to have severe mixed sleep apnea, with many central and obstructive events, and for you to push to obtain ASV at the earliest possible time.
 
−
 
 
−
 
 
−
 
 
−
Sleep Study on BiPAP determined events rated according to the machine data remains very high with mixed events. The machine data suggest the results are much worse than the untreated AHI. You should tell them you have looked at the results of the tests and don't really see how it was determined (1) that you have obstructive apnea, and (2), how it was determined that you had a "good response" to bipap pressure of 15/10. At 1:15 at 14/9 and 15/10 shows central abundant apnea (approximately 30 AHI to numerous to count). At 1:45 to 2:15 15/10 was tried for 30 minutes with 11 apnea (AHI 22) with the longest apnea of the night at 2:00 at 15/10. A final period of 15/10 was tried at about 4:30, lasting about 15 minutes (deducting for wake) with 2 OA events (AHI 8) No sustained period of efficacy (ahi<5) was found. Your ongoing machine data confirm any efficacy found during the titration study may have been coincidental or an anomaly. You should flatly say in your opinion BiPAP at the prescribed pressures is not working, and explain any symptoms you feel (fatigue, frequent awakenings, whatever).
 
−
 
 
−
[http://www.apneaboard.com/CSA-and-ASV-Updated-Morgan.pdf CSA-and-ASV-Updated-Morgan.pdf]
 
−
 
 
−
== Requirements for Medicare ==
 
−
 
 
−
'''Respiratory Assist Device (RAD)'''<br />
 
−
'''Order Template Guidance'''<br />
 
−
'''Purpose'''<br />
 
−
 
 
−
This template is designed to assist a clinician in completing a Written Order Prior to Delivery (WOPD) in order for a Respiratory Assist Device (RAD) and Detailed Written Order (DWO) for accessories to meet
 
−
requirements for Medicare eligibility and coverage. When completed appropriately, this template meets requirements for a WOPD or a DWO. The clinician can keep the completed template on file within the patient’s medical record or it can be used to develop an order template for use with the system containing the patient’s electronic medical record.
 
−
 
 
−
'''Patient eligibility for coverage of RAD therapy under Medicare'''
 
−
Eligibility for coverage of RAD therapy and accessories under Medicare requires a physician or qualified Non-Physician Practitioner (NPP, ''nurse practitioner, clinical nurse specialist, or physician assistant'') to establish that coverage criteria are met. This helps to ensure the RAD and accessories provided are consistent with the physician’s prescription and supported in the patient’s medical record.
 
−
 
 
−
A Face-to-Face (F2F) encounter is required by Medicare for the following RAD devices:
 
−
*'''E0470''' - RESPIRATORY ASSIST DEVICE, BI-LEVEL PRESSURE CAPABILITY, WITHOUT BACKUP RATE FEATURE, USED WITH NONINVASIVE INTERFACE, E.G., NASAL OR FACIAL MASK (INTERMITTENT ASSIST DEVICE WITH CONTINUOUS POSITIVE AIRWAY PRESSURE DEVICE)
 
−
*'''E0471''' - RESPIRATORY ASSIST DEVICE, BI-LEVEL PRESSURE CAPABILITY, WITH BACK-UP RATE FEATURE, USED WITH NONINVASIVE INTERFACE, E.G., NASAL OR FACIAL MASK (INTERMITTENT ASSIST DEVICE WITH CONTINUOUS POSITIVE AiRWAY PRESSURE DEVICE)
 
−
 
 
−
NOTE: RAD accessories do not require a F2F encounter, but do require a DWO.
 
−
 
 
−
The F2F Encounter must be completed within a 6-month timeframe prior to completion of the WOPD that starts RAD therapy for the treatment of a clinical condition supported by the patient’s diagnosis.
 
  
−
Indications for use of a RAD is divided into the following categories:
+
== Symptoms ==
−
* Restrictive thoracic disorders, (i.e., progressive neuromuscular disorders or severe thoracic cage abnormalities);
 
−
* Severe chronic obstructive pulmonary disease (COPD); use of a RAD in COPD patients requires,
 
−
** A facility-based polysomnogram to rule out obstructive sleep apnea in order to initiate Medicare coverage,
 
−
** A prerequisite trial of noninvasive ventilation without a backup rate, and
 
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** Treatment with continuous positive airway pressure devices.
 
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* '''Central sleep apnea''', i.e., apnea not due to airway obstruction;
 
−
* '''Hypoventilation'''; and
 
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* '''Obstructive sleep apnea (OSA)'''.
 
  
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See Appendices A&B for further guidance on indications for use and coverage.
+
Note that these are not all specific to Central/Mixed/Complex apnea. They are symptoms that impact our sleeping, arousals, and yes apnea too. Think of these, but do not limit yourself to these when you are asked "How do you feel?"
−
 
 
−
'''Initial coverage -- first three (3) months of therapy'''
 
−
The medical record must document symptoms characteristic of sleep-associated hypoventilation, e.g.:
 
 
* Daytime hypersomnolence;
 
* Daytime hypersomnolence;
 
* Excessive fatigue;
 
* Excessive fatigue;
 
* Morning headache;
 
* Morning headache;
 
* Cognitive dysfunction;
 
* Cognitive dysfunction;
−
* Dyspnea, etc.; and
+
* Dyspnea, etc.;  
−
* Beneficiary has one (1) of the disorders listed above and meets all coverage criteria for that disorder as listed below.
+
* Fatigue;
 +
* Insomnia;
 +
* Difficulty going to sleep;
 +
* Difficulty falling asleep;
 +
* Wakening during the night;
 +
* Daytime Sleepiness;
 +
* Excessive Daytime Sleepiness (EDS);
 +
* Poor concentration;
 +
* Difficulty with balance;
 +
* Shortness of breath;
 +
* Dry mouth;
 +
* Restless Sleep;
 +
* Non-Restorative Sleep;
 +
* Snoring;
 +
* Obstructive Sleep Apnea;
 +
* Restless Leg Syndrome;
 +
* Nocturnal Leg Cramps;
  
−
'''Continued coverage (beyond the first three months of therapy) - E0470 or E0471'''
 
−
Medical record documentation has a signed and dated statement that the beneficiary was re-evaluated on/after the 61st day of therapy demonstrating:
 
−
* Progress of relevant symptoms; and
 
−
* Beneficiary usage of the device (average 4 hours per 24 hours)
 
  
−
'''Beneficiaries entering Medicare'''
+
== Tips for getting an ASV machine ==
−
There must be documentation of the following:
+
I see 2 big steps.<br />
−
* A qualifying test confirming that the beneficiary had testing prior to Fee-for-Service (FFS)
 
−
Medicare enrollment, that meets the current coverage criteria in effect at the time that the
 
−
beneficiary seeks Medicare coverage of a replacement device and/or accessory; and
 
−
* There must be a F2F clinical evaluation following enrollment in FFS Medicare that confirms all of the following:
 
−
** The beneficiary has the qualifying medical condition for the applicable scenario; and
 
−
** Testing performed, date of the testing used for qualification and results; and
 
−
** The beneficiary continues to use the device; and
 
−
** The beneficiary is benefiting from the treatment.
 
−
 
  
−
'''Other guidance'''
+
First, you need to change doctors to a doctor that treats Central Apnea.  By that, I mean one that actually prescribes ASV machines with some regularity.  Realize that all doctors 'treat' Central Apnea.  Also note that most doctors only treat OSA, even though they 'treat' Central Apnea.  Any doctor that routinely prescribes ASV machines is likely much more aware of what is required than other doctors, these doctors are the ones you want.<br />
−
Completing the RAD order template does not guarantee eligibility and coverage but does provide an area within the patient’s medical file that is readily identifiable and available in support of RAD therapy equipment and accessories ordered and billed to Medicare. This template may be used with the Respiratory Assist Device Laboratory Test Results Template and Respiratory Assist Device Face to Face Template.
 
  
−
'''Who can complete the Respiratory Assist Device Order Template?'''
+
Second, gather evidence with your current machine to justify an ASV machine
−
Physician/NPP who performs the F2F Encounter
+
third whenever you go in for a sleep study, if not a sole study of ASV request a split study that includes ASV,  If you have Central Apnea, an ASV titration has a very high probability of demonstrating success.  It is much easier to get an ASV if you have a titration demonstrating that it works for you.<br />
  
−
[[File:Respiratory-Assist-Device-Order-Template-Draft-20180412-R10b.pdf|thumb|center]]<br />
 
−
 
−
[[File:Mr_checklist_rad_e0471.pdf|thumb|center]]
 
  
−
Central Sleep Apnea or Complex Sleep Apnea
+
Another possibility is to go "rouge", go without a medical team or insurance to back you up.
−
Prior to initiating therapy, a complete facility-based, attended polysomnogram was performed.
+
# This method is not supported by everyone. You always treat yourself at your own risk.
−
The polysomnogram documents all of the following.
+
# Verify that you have a Central Apnea other than one based on CO2 in the blood such as [[Treatment-Emergent Central Apnea]] (Other much cheaper techniques can treat this) There is no sense in getting an ASV if you don't need one.
−
A diagnosis of central sleep apnea (CSA) or complex sleep apnea (CompSA); and there was significant improvement of the sleep – associated hypoventilation with the use of the device on the settings prescribed for initial use at home, while breathing the beneficiary’s prescribed FI02.
+
# Procure a used ASV on the secondary market. (Craigs List, e-bay, you got the idea,
 +
# Join a self-help forum, set up your own thread so you can maintain a history.  http://www.apneaboard.com/forums  is a good one with many ASV users contributing  This is a very important step because this is your support.
  
−
'''Central sleep apnea (CSA)''' is defined as:
+
== Further reading ==
−
# An apnea-hypopnea index (AHI) greater than 5, and
+
[[Justifying ASV backup Info]]<br />
−
# The sum total of central apneas plus central hypopneas is greater than 50% of the total apneas and  hypopneas, and
 
−
# A central apnea-central hypopnea index (CAHI) is greater than or equal to 5 per hour, and
 
−
# The presence of at least one of the following:  Sleepiness, Awakening short of breath, Difficulty initiating or maintaining sleep, frequent awakenings, or nonrestorative sleep, Snoring, Witnessed apneas
 
−
# There is no evidence of daytime or nocturnal hypoventilation
 
  
−
'''Complex sleep apnea (CompSA)''' is a form of central apnea specifically identified by all of the following:
+
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7725531/
−
# With use of a positive airway pressure device without a backup rate (E0601 or E0470), the  polysomnogram (PSG) shows a pattern of apneas and hypopneas that demonstrates the  persistence or emergence of central apneas or central hypopneas upon exposure to CPAP (E0601)  or a bi-level device without backup rate (E0470) device when titrated to the point where obstructive events have been effectively treated (obstructive AHI less than 5 per hour).
+
----
−
# After resolution of the obstructive events, the sum total of central apneas plus central hypopneas is greater than 50% of the total apneas and hypopneas; and
 
−
# After resolution of the obstructive events, a central apnea-central hypopnea index (CAHI) greater than or equal to 5 per hour.
 

Latest revision as of 15:21, 8 July 2021

Justifying ASV

Note: Much of the material in this article (especially in relation to Medicare requirements) is relevant to the United States only.

It is very likely that you are here because someone referred you here because after reviewing your OSCAR daily charts and/or your Sleep Studies they felt that you are a candidate for an Advanced PAP machine such as one of the Bi-Levels. There are two paths to treatment and the choice is yours.

Path 1: The path that you were thrown into whether you realize it or not. That is to treat your apnea, whatever types of apnea that you have, with the machine they gave you, a CPAP, preferable an auto-CPAP either the ResMed or the Philips Respironics machines. New members of the forum come here looking for help with intractable apnea and discomfort from these problems. The forum members and "gurus" are very good at optimizing therapy to reduce these problems, and increase comfort with the therapy.

Path 2: Take the often difficult and lengthy journey to procure an advanced PAP machine. The new member that has been advised they have central or complex apnea needs to be aware that optimizing may provide significant immediate relief from symptoms and improve AHI, but improved therapy results can disqualify them from higher levels of therapy (ASV), that might be possible without this self-optimization. Sometimes individuals resolve central and complex apnea with CPAP and find long-term comfort, however, if results are inconsistent, or produce good AHI but not comfort or relief from other symptoms, The forum optimization should be discontinued as soon as possible to avoid disqualification from higher levels of therapy. This path frequently requires failing at CPAP, then failing at BiLevel E0470, before succeeding at ASV E0471

ASV or Adaptive servo-ventilation (ASV) The below is based on Medicare Requirements for procuring

  • E0470 - RESPIRATORY ASSIST DEVICE, BI-LEVEL PRESSURE CAPABILITY, WITHOUT BACKUP RATE FEATURE, USED WITH NONINVASIVE INTERFACE, E.G., NASAL OR FACIAL MASK (INTERMITTENT ASSIST DEVICE WITH CONTINUOUS POSITIVE AIRWAY PRESSURE DEVICE) (Similar to ResMed Aircurve 10 VAuto)
  • E0471 - RESPIRATORY ASSIST DEVICE, BI-LEVEL PRESSURE CAPABILITY, WITH BACK-UP RATE FEATURE, USED WITH NONINVASIVE INTERFACE, E.G., NASAL OR FACIAL MASK (INTERMITTENT ASSIST DEVICE WITH CONTINUOUS POSITIVE AiRWAY PRESSURE DEVICE) (Similar to ResMed Aircurve 10 ASV or ResMed Aircurve 10 ST/A)

Complex Sleep Apnea

For Complex Sleep Apnea the Medicare requirements for issuing an ASV machine.

  • Therapy Optimization should be discontinued and the original settings, from the doctor, restored.
  • Titrate to minimize OSA, that is the obstructive AHI to less than 5 per hour. This typically is raising EPAP or pressure until obstructive AHI is less than 5 per hour, we expect this to make the Central and Complex Apnea worse thus failing the current treatment
  • Record the central apnea-central hypopnea index (CAHI) (looking for greater than or equal to 5 per hour and greater than 50% of total AHI)
  • Document the presence of at least one of the following symptoms: These symptoms are specifically noted by Medicare. These are key symptoms that we look for by asking "How do you feel?". Do not limit your answers to the following and do not fabricate the answers.
  1. Sleepiness, "How do you feel?"
  2. Awakening short of breath, "How do you feel?"
  3. Difficulty initiating or maintaining sleep, "How do you feel?"
  4. Frequent awakenings, or "How do you feel?"
  5. Nonrestorative sleep, "How do you feel?" Nonrestorative sleep is defined as the subjective feeling that sleep has been insufficiently refreshing
  6. Snoring, Can be documented on OSCAR
  7. Witnessed apneas Most of us have this one with our significant others

For Central Sleep Apnea

For Central Sleep Apnea the Medicare requirements for issuing an ASV machine.

  • Therapy Optimization should be discontinued and the original settings, from the doctor, restored.
  • Document a central apnea-central hypopnea index (CAHI) is greater than or equal to 5 per hour also apnea-hypopnea index (AHI) greater than 5'
  • Document The sum total of central apneas plus central hypopneas is greater than 50% of the total apneas and hypopneas
  • Document the presence of at least one of the following symptoms: These symptoms are specifically noted by Medicare. These are key symptoms that we look for by asking "How do you feel?". Do not limit your answers to the following and do not fabricate the answers.
  1. Sleepiness, "How do you feel?"
  2. Awakening short of breath, "How do you feel?"
  3. Difficulty initiating or maintaining sleep, "How do you feel?"
  4. Frequent awakenings, or "How do you feel?"
  5. Nonrestorative sleep, "How do you feel?" Nonrestorative sleep is defined as the subjective feeling that sleep has been insufficiently refreshing
  6. Snoring, Can be documented on OSCAR
  7. Witnessed apneas Most of us have this one with our significant others


File:Respiratory-Assist-Device-Order-Template-Draft-20180412-R10b.pdf
File:Mr checklist rad e0471.pdf

Symptoms

Note that these are not all specific to Central/Mixed/Complex apnea. They are symptoms that impact our sleeping, arousals, and yes apnea too. Think of these, but do not limit yourself to these when you are asked "How do you feel?"

  • Daytime hypersomnolence;
  • Excessive fatigue;
  • Morning headache;
  • Cognitive dysfunction;
  • Dyspnea, etc.;
  • Fatigue;
  • Insomnia;
  • Difficulty going to sleep;
  • Difficulty falling asleep;
  • Wakening during the night;
  • Daytime Sleepiness;
  • Excessive Daytime Sleepiness (EDS);
  • Poor concentration;
  • Difficulty with balance;
  • Shortness of breath;
  • Dry mouth;
  • Restless Sleep;
  • Non-Restorative Sleep;
  • Snoring;
  • Obstructive Sleep Apnea;
  • Restless Leg Syndrome;
  • Nocturnal Leg Cramps;


Tips for getting an ASV machine

I see 2 big steps.

First, you need to change doctors to a doctor that treats Central Apnea. By that, I mean one that actually prescribes ASV machines with some regularity. Realize that all doctors 'treat' Central Apnea. Also note that most doctors only treat OSA, even though they 'treat' Central Apnea. Any doctor that routinely prescribes ASV machines is likely much more aware of what is required than other doctors, these doctors are the ones you want.

Second, gather evidence with your current machine to justify an ASV machine third whenever you go in for a sleep study, if not a sole study of ASV request a split study that includes ASV, If you have Central Apnea, an ASV titration has a very high probability of demonstrating success. It is much easier to get an ASV if you have a titration demonstrating that it works for you.


Another possibility is to go "rouge", go without a medical team or insurance to back you up.

  1. This method is not supported by everyone. You always treat yourself at your own risk.
  2. Verify that you have a Central Apnea other than one based on CO2 in the blood such as Treatment-Emergent Central Apnea (Other much cheaper techniques can treat this) There is no sense in getting an ASV if you don't need one.
  3. Procure a used ASV on the secondary market. (Craigs List, e-bay, you got the idea,
  4. Join a self-help forum, set up your own thread so you can maintain a history. http://www.apneaboard.com/forums is a good one with many ASV users contributing This is a very important step because this is your support.

Further reading

Justifying ASV backup Info

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7725531/




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