What Causes Sleep Apnea

What Causes Sleep Apnea

What causes sleep apnea?

Any factor can cause the narrowing of the airway, and the upper airway obstruction may cause nocturnal hypoxia during sleep, leading to sleep apnea syndrome. The main common causes are:

  • Aging:

The prevalence of OSA (obstructive sleep apnea) increases with age from young adulthood through the age of 60s and 70s, then appears to plateau.

  • Gender:

The OSA is two to three times more common in men than in women. But between men and the peri- and post-menopausal women, the gender difference in prevalence is not as great.

  • Obesity:

For both men and women, the prevalence of OSA increases with increasing BMI and some weight-related indicators such as neck circumference, waist-to-hip ratio. Studies have found that a 10% weight gain can increase the risk of developing OSA by 6 times.

  • Upper airway structure abnormalities:

The obstruction of the upper airway (oral cavity, nasal cavity, and pharynx) caused by various reasons, including nasal diseases/nasal congestion such as deviated or crooked nasal septum, turbinate hypertrophy, sinus polyps, etc., oral and pharyngeal factors such as tonsil and adenoid hypertrophy, an overly long or floppy soft palate, elongated uvula, swollen tongue, the back of the tongue base, etc., craniofacial abnormalities such as the smaller-than-normal lower jaw, and upper airway narrowing caused by other reasons such as infection, trauma or surgery, etc.

  • Drinking alcohol or using sedative-hypnotic drugs:

These substances can make the soft tissues of the upper airway more flaccid, which will obstruct the airflow, make breathing more difficult, cause sleep apnea, and prolong the duration of apnea.

  • Smoking:

Smoking may increase the risk of developing OSA, or at least worsen existing symptoms. In one study, current smokers were three times more likely to have OSA than those who had smoked in the past (but had quit) or who had never smoked.

  • Other diseases causing sleep apnea syndrome:

cerebrovascular disease, congestive heart failure, hypothyroidism, acromegaly, vocal fold paralysis, brain tumors, neuromuscular disorders, laryngopharyngeal reflux, gastroesophageal reflux, and airway compression due to mediastinal mass. These diseases mentioned above can cause or aggravate airway resistance, thus causing sleep apnea.

Other medical conditions that may have an increased association with OSA include obesity hypoventilation syndrome, hypertension (particularly resistant hypertension), cardiovascular disease, atrial fibrillation, pulmonary hypertension, end-stage kidney disease, chronic lung disease, including asthma, chronic obstructive pulmonary disease (COPD), and idiopathic, pulmonary fibrosis; stroke and transient ischemic attacks, pregnancy ( gestational diabetes, pregnancy-induced hypertension), acromegaly, hypothyroidism, polycystic ovary syndrome, Parkinson’s disease, floppy eyelid syndrome.

Who is most affected by sleep apnea?

  • Sleep apnea syndrome is most common in people who are obese, especially those who are centripetally obese with thicker necks and larger hips.
  • Men are more likely to develop OSA than women.
  • People who are older are also more likely to have OSA.
  • In terms of facial appearance, people with small mouths and small lower jaws are more likely to develop OSA.
  • People who smoke or drink alcohol for a long time or take sedative drugs before bedtime are also at high risk for OSA.
  • In addition, there is a certain degree of familial aggregation of OSA, which may be related to genetic factors and common lifestyle habits. For example, genetic factors may make most of the family have small mouths and jaws, or common lifestyle habits make more overweight people in the family, etc.
  • Furthermore, the development of OSA is associated with the onset of certain specific medical conditions, such as women who are pregnant are more likely to develop OSA than women who are not pregnant; and menopausal women are at greater risk of developing OSA compared to premenopausal women.

What are the conditions that predispose to sleep apnea syndrome?

Sleeping in the supine position, drinking alcohol, or using sedative-hypnotic drugs before bedtime can significantly increase the risk of apnea during sleep that night, and worsen existing OSA symptoms.

Does Poor Sleep Cause High Blood Pressure

Does Poor Sleep Cause High Blood Pressure

Poor sleep may cause high blood pressure? Some researchers report that poor sleep has become a risk factor for hypertension in the group of young and middled-aged people.

1. Insufficient sleep or excessive sleep

There is a U-shape curve relationship between sleep duration and high blooe pressure, which means sleeping for not-enough time or too much will increase the risk of developing hypertension. It is suggested to sleep for 7 or 8 hours for adults.

Previous studies have showed that people aged 32 to 59 who averaged less than 6 hours of sleep were more than twice as likely to develop hypertension as those who have enough sleep time. Those who sleep less than 4.9 hours have 3.15 times of the risk of developing hypertension.

Why does lack of sleep affect our blood pressure?

When our sleep time is reduced, the waking time is relatively prolonged, the excitability on the heart influenced by the sympathetic nerve system is strengthened, which will activate the hypothalamic-pituitary-adrenal axis, promoting a series of hormones secretion, then resulting in increased blood pressure.

In addition, hypertension can also affect sleep, causing autonomic dysfunction, resulting in a significant decline in sleep quality. Eventually, there is a vicious cycle between sleep deprivation and high blood pressure.

2. Snoring

Mild snoring has little impact on health, but severe snoring with apnea, known medically as obstructive sleep apnea (OSA), is a cause for alarm.

Studies have shown that about 50% – 92% of OSA patients have hypertension, and 30% – 50% of hypertension patients have OSA. Excluding the influence of obesity and age, OSA has become an independent risk factor for hypertension.

Why does snoring affect our hypertension?

OSA patients are prone to apnea during sleep, which leads to intermittent hypoxia. The transition from hypoxia to resuming breathing increases the activity of sympathetic nerves, causing peripheral vascular contraction.

In addition, the impaired endothelial function of resistence vessels will affect their diastolic function, resulting in vasoconstriction and increased blood pressure. Studies have shown that endothelium – dependent dilation of resistance vessels is impaired in OSA patients compared with healthy people.

Wellue’s Solution & Recommended Products

1. WiFi BP Monitor with ECG to meansure blood pressure and track ECG in daily life

The American Heart Association BP measurement guideline stated that 3 readings should be taken in succession, separated by at least 1 min. The average value of 3 bp measurements should be used as the more accurate and reliable blood pressure readings.

This wifi blood pressure monitor is perfect for you to continuously measure 3 times of blood pressure to prevent from giving you a false sense of security about your health.

In addition, this monitor can track ECG for 30s and the connected APP will offer AI Analysis to detect some ECG events. Data can be conveniently synced through both of Wi-Fi and Bluetooth.

wifi bp monitor with ecg function

2. Checkme O2 Max Wrist Oxygen Monitor to check sleep apnea or to ensure the effect of the treatment

According to the American Sleep Association, the repetitive breathing pauses caused by sleep apnea during the nights can occur several times per hour and last for over 10 seconds. Continuous trackers like Checkme™ O2 Max supports long hours monitoring during your sleep, can help detecting all the Apneic events and Hypopenic events in every 2 seconds.

checkme o2 max oxygen monitor

3. iBreeze APAP Machine

The iBreeze makes it easier than ever for new CPAP patients to adjust to therapy. The smart technology of the iBreeze also helps make humidification more dynamic, helps prevent leaks, and also captures critical sleep data for you and your doctor to have and review anytime.

This machine is the ideal choice for patients who have difficulty adjusting to CPAP machines.

apap machine
Wellue O2Ring Pulse Oxygen Monitor Review From Wacky Racky

Wellue O2Ring Pulse Oxygen Monitor Review From Wacky Racky

I really don’t even know where to start with this little gadget. Hands down this is the best pulse oxygen monitor on the market that I have found.


  • Alarms- Low Oxygen, High and Low Pulse
  • Reports
  • Bluetooth connected Phone App
  • Spot Check Rates While Active


  • Not Waterproof (probably not something easily done either)
  • Price (a little on the high side but well worth it)
  • Battery Life (approx 12 hours per charge)

Many consumer-grade pulse oximeters have a hard time getting a reading while you are active. Forget smartwatches, they require you to remain still while they check your oxygen saturation too. This is of no benefit to people with heart or lung disease that need to spot check while active and resting.

While the price tag may seem a little high at $165 let me tell you why it’s worth every penny. Especially with Christmas around the corner, this might be the perfect gift for someone you love who is chronically ill. Personally, if you have it in your budget to buy 2, I would highly recommend doing so especially if the person is on oxygen 24/7. Let me explain why.

Whenever I don’t wear my O2ring, I almost always regret it. The reason is, frankly, I am a dumbass that rarely listens to my body’s warning whistles until it’s to the point of no return. This little device has kept me from going past the point of no return many times since getting it.

Usually, I don’t realize there is something wrong with my oxygen until I have that horrible low oxygen headache. Which feels like someone took a blender to my brain. No alarm bells go off when I am getting more short of breath because I am always short of breath. Even as the headache is building, my internal alarm bells fail to sound the warning. This O2 ring can literally save you from all the headaches low oxygen saturation causes your body.

I live in a house with critters of all kinds. If it isn’t my husband or kids accidentally disconnecting my oxygen, it’s one of the four-legged kids. Or it’s a crack in the line that is making it so my oxygen flow is reduced. One time, this ring alerted me to my oxygen concentrator failing as the compressor was dying and my oxygen flow dropped.

Yes, this ring alerts you not only when your oxygen is dropping but heart rate increase and drop as well. It has several levels of vibration intensity that you can control. You can also custom set your thresholds for your oxygen and heart rate in the phone app.

Several weeks ago my oxygen kept falling and my heart rate kept rising. I couldn’t figure out why for the life of me. To top it off I wasn’t feeling well so I knew something was wrong. However, my line was connected and the tubing was new. So I just kept hitting the ignore.

Over the next few hours, I started feeling even worse and my alarms kept going off. This time I listened to the monitor and decided to check my flow rate was on my concentrator.  This is usually set to 4 LPM. My concentrator was barely registering 1 LPM. At first, I assumed a dog bumped into it and dropped my flow rate down. But when I tried turning it up nothing happened. The next thing I knew, the ear-piercing alarm from my concentrator was going off too. For several hours this little device was trying to tell me something was wrong, I just wasn’t listening.

Had I listened to my O2 Ring when it first started alerting me of the problems I would’ve gotten my concentrator to my supplier during normal business hours instead of relying on their emergency service?

Another time when moving from house to vehicle, from concentrator to tank, I forgot to connect the tubing to the tank or didn’t secure it tight enough. I turned the tank on but somehow the O2 line wasn’t connected. Within a mile down the road, my O2 ring was vibrating. My son immediately checked my tank and noted the detached tubing. I was able to thwart a severe headache because I was wearing this ring.

I decided to take this ring to our local hospital’s Cardio-Pulmonary Rehab to let them try it out for a few weeks. I wanted to get the opinion of respiratory therapists who could run this unit through testing along with their units. This also allowed other patients to try it out to get even more thoughts and opinions. Just like me, everyone loved it. The RTS gave it a 9/10!

If you need a pulse ox this is the best one I have found on the market. If cost is a concern they do make another similar unit. It just doesn’t have all the bells and whistles of this unit but you should check it out below.

Please note, there are no affiliate links. I do not write these reviews to make money on your clicks. I write to educate and help people make informed purchases.


https://getwellue.com/pages/wearo2-wearable-pulse-oximeter (I have not tested this unit). This just measures O2 according to the comparison chart. Although images and descriptions show it does both pulse and O2, this unit is also waterproof! It is also documented as lighter, has a longer battery life, and is $65.00 cheaper.

CPAP&APAP&BiPAP, what is the biggest difference?

CPAP&APAP&BiPAP, what is the biggest difference?

Usually, after apnea detection and examination, doctors prescribe treatment with CPAP/APAP or BiPAP machines.

Generally speaking, there are 3 types of PAP machines: CPAP, APAP, BiPAP machines.

A CPAP machine can deliver a fixed level of air pressure to the airway regardless of whether the user is inhaling or exhaling. 

CPAP is mainly used to treat OSA (Obstructive Sleep Apnea). 

It helps the user keep the airway open and prevent obstruction of the airway during sleep.

An APAP machine (auto CPAP machine) is far advanced than traditional CPAP machines.

It can auto-adjust to deliver a continuous stream of air to the user at an optimum pressure level. APAP is mainly used to treat OSA (Obstructive Sleep Apnea) in a very comfortable way.

It helps the user keep the airway open with minimum pressure levels and prevent obstruction of the airway with enough air pressure during sleep.

A BiPAP/BPAP machine can deliver 2 levels of pressure to the airway, one for inhalation, another for exhalation. 

BiPAP can be used to treat much more diseases, such as COPD (Chronic Obstructive Pulmonary Disease), OSA (Obstructive Sleep Apnea), CSA (Central Sleep Apnea). 

It can not only help the user keep the airway open and prevent obstruction of the airway but also get the user more oxygen and reduce CO2 in his/her bloodstream.

What is CPAP?

 The standard treatment for obstructive sleep apnea is the use of a machine that provides support to keep your airway open while you are asleep. This can be accomplished with continuous positive airway pressure (CPAP).

 In CPAP, a constant flow of pressurized room air is provided via a face mask.


How does CPAP work to treat sleep apnea and what pressure is needed? The pressure setting of this airflow is often determined by a doctor based on your needs.

This may be evaluated as part of a sleep study or can be estimated based on your risk factors, such as your anatomy and weight.

An effective pressure setting is meant to prevent both apnea and snoring and should reduce the apnea-hypopnea index (AHI) below five, as well as improve the other symptoms associated with sleep apnea.

An associated type of therapy is AutoCPAP, or APAP, in which a range of pressures is provided by the device.

If resistance in the upper airway (at the level of the soft palate or base of the tongue in the throat) is detected, the pressure delivered will self-adjust within a prescribed range.

What is BiPAP or Bilevel Therapy?

Bilevel positive airway pressure (BiPAP) is a breathing treatment for sleep apnea and other health conditions that impact breathing.

This treatment is less common than continuous positive airway pressure (CPAP).

Much of a BiPAP machine is the same as the standard CPAP machine.

For example, it still requires a face mask and tubing connected to the device. But there are some differences between BiPAP and CPAP.

Besides, it can be more effective in select circumstances.

The “bilevel” component refers to the fact that there are in fact two pressures, which the machine is able to alternate between.

This allows you to breathe in with higher pressure and breathe out against a slightly lower pressure.

This may help those who are struggling to acclimate to CPAP.

It may improve air swallowing (called aerophagia).

It may also help with claustrophobia.

Bilevel may be required when pressures are higher to improve comfort, especially at PAP pressures that are 15 centimeters (cm) of water pressure or higher.

The pressurized air settings of the BiPAP include:

Inspiratory positive airway pressure (IPAP): This is the pressure the machine provides as you inhale. The BiPAP provides a higher IPAP than the CPAP. So, when you inhale, the BiPAP supports your breath as you take it in.

Expiratory positive airway pressure (EPAP): This is the pressure the machine provides when you exhale. The BiPAP offers a lower pressure that allows you to breathe out comfortably.

Beyond these standard settings, there are a few other available variations. They include:

Bilevel ST: This includes the timed delivery of a breath if the machine detects a pause in your breathing.

These pauses often occur in central sleep apnea.

How Can iBreeze™ BiPAP Machine Help

 S/T Mode (Spontaneous/Timed Mode) & BPM/BUR

 A BPM value (Breaths per Minute) can be set as a backup rate in S/T Mode. If the user’s spontaneous respiratory rate falls below that value, the device will add pressure to prompt him/her to breathe.

 With the BiPAP machine intervening in the breathing, it can help the user inhale and exhale more naturally and easily during challenging conditions. It can also get the user more oxygen and reduce CO2 in the user’s bloodstream.

 Auto Bi-Level Technology to Give Optimal Pressure Levels

 With the EVAPS (Efficient Volume Assured Pressure Support) option chosen, iBreeze auto-BPAP is able to intelligently analyze the changes in the user’s breathing patterns.

 It auto-adjusts the inspiratory positive airway pressure (IPAP) and expiratory positive airway pressure (EPAP) separately, giving the user optimal levels of air pressure on a breath by breath basis. Meanwhile, the auto-BPAP maintains a constant tidal volume the user needs.

Do I Need CPAP or BiPAP?

People with the most common form of obstructive sleep apnea usually start treatment with CPAP or AutoCPAP(APAP).

Bilevel, or BiPAP, is more often used to treat central sleep apnea, which is characterized by pauses in breathing without the obstruction of the airway.

Central sleep apnea is identified as part of a sleep study.

It may occur more often in people who have had heart failure, a stroke, or in those who chronically use narcotic pain medications.

It can sometimes be caused by CPAP itself, but this rarely persists beyond the first few months of use.

The BiPAP device may be set to compensate for these pauses in breathing by kicking in an extra breath as needed.

People with the most common form of obstructive sleep apnea usually start treatment with CPAP or AutoCPAP(APAP).

Bilevel, or BiPAP, is more often used to treat central sleep apnea, which is characterized by pauses in breathing without the obstruction of the airway.

Central sleep apnea is identified as part of a sleep study. It may occur more often in people who have had heart failure, a stroke, or in those who chronically use narcotic pain medications.

It can sometimes be caused by CPAP itself, but this rarely persists beyond the first few months of use.

The BiPAP device may be set to compensate for these pauses in breathing by kicking in an extra breath as needed.

Some BiPAP devices are quite sophisticated, varying the airflow that is delivered to compensate for respiratory and neuromuscular disorders that affect breathing as well.

These disorders include chronic obstructive pulmonary disease (COPD), amyotrophic lateral sclerosis (ALS), and other conditions.

BPAP is ideal for treating patients with respiratory insufficiency and sleep apnea, like COPD (Chronic Obstructive Pulmonary Disease), OSA (Obstructive Sleep Apnea), CSA (Central Sleep Apnea), OHS (Obesity Hypoventilation Syndrome), etc.

In addition to treating the above diseases, BiPAP is also helpful in the following situations:

People who have trouble with CPAP: People who have difficulty breathing out against CPAP pressure may benefit from BiPAP. People more commonly have problems with CPAP when higher pressures are required to keep the airway open.

For example, at pressures higher than 15 centimeters of water pressure (CWP), BiPAP may help to improve compliance among those struggling with CPAP therapy.

People who are hospitalized: BiPAP is a non-invasive treatment for people who are in respiratory distress but who do not wish to be on a ventilator.

How Can iBreeze™ BiPAP Machine Help

More Therapy Modes & Ti-Control

iBreeze BiPAP system offers a wide range of therapy modes to treat different respiratory conditions, severe or mild. In a number of therapy modes, such as in S/T Mode, the BiPAP system allows the user to set the duration of inspiration time (Ti-Control) for spontaneous breathing.

If the duration of breathing in goes outside the set range, the machine can change the timing of IPAP/EPAP delivery to help the user breathe normally.

iBreeze BPAP machine comes with a powerful motor made of ultra-durable materials.

It can continuously provide pressurized air to a user with pressure up to 30 cmH2O (highest in the market).

So the BPAP is ideal for treating patients with respiratory insufficiency and sleep apnea, like COPD (Chronic Obstructive Pulmonary Disease), OSA (Obstructive Sleep Apnea), CSA (Central Sleep Apnea), OHS (Obesity Hypoventilation Syndrome), etc.



With lower expiratory pressure, iBreeze Bi-Level PAP can ensure maximum comfort during NIV (Non-Invasive Ventilation) therapy.

It also provides the patient with advanced ramp settings, expiratory pressure relief, and an integrated humidifier to better get rid of discomfort.

So the patient can become compliant more quickly and maintain long-term compliance.

How to choose a PAP that suits you?

If you wonder which PAP machine would be appropriate for you, start by speaking with your sleep doctor.

After they evaluate your risk factors and sleep study, they can recommend the proper treatment.

Of course, your prescription will clearly state which PAP machine you need.

Wellue Checkme O2 Max Review

Wellue Checkme O2 Max Review

Wellue O2ring gif

I’m very impressed with the Checkme O2 Max!

Lynn A.


The Checkme O2 Max from Wellue is a sophisticated device that is easy to use and I’m very impressed and grateful for its assistance.   I first was aware of apnea in my 30’s when I would startle awake and sit up gasping for breath.  These episodes seemed to improve over the years (I’m now 75) and I  attributed occasional morning headaches to sinus/allergy issues though my husband of 30+ years has often mentioned having to nudge me to re-start my breathing in the night.  I was prompted to look up O2 monitoring apps after a recent middle of the night trip to the emergency department after waking with unaccountable rapid/forced breathing and subsequent confusion.  Although the cause wasn’t identified, and I fully recovered, it did take about 10 hours for my B.P. to return to it’s usual levels.  It wasn’t until a few days later my husband suggested the incident could have been apnea-related.

I purchased Wellue’s most expensive pulse oximeter because it wasn’t much more money and offered the 2-minute sampling rather than 4 minutes, has a powerful (7 day) battery plus it had the option of vibration or sound alerts for low O2 levels.  I also discovered it could be set for a sound alert if the sensor comes off your thumb (only 2 times in my 13 days of records so far),  and that I can reduce the threshold for the alert below 90% (initially I was aware of all of the alerts while sleeping and so I reduced the alert threshold to 88% so my brain would be less likely to habituate to the vibration–and so I might sleep better).  The summary reports on the smart phone app are very helpful and I also keep the more detailed records on my desktop via the O2 Insight Pro app (Wellue kindly quickly supplied an improved cable for this latter application to work reliably every time–otherwise it was a bit hit or miss on my older PC).  My husband has noticed that my sleeping is now much quieter (I’ve always been a snorer and now apparently I rarely do)—and that I seem to sleep more deeply.  I feel refreshed on waking up after using the Wellue Checkme O2 max and am now mostly unaware of the vibration alerts. In glancing through the records, I’m wondering if there might be some sort of subtle training/learning going on since after one week the depth of the O2 drops appears to decrease, and this is even more apparent now after these almost two weeks of use.

Great monitor with helpful support

It’s Amazing!


Let’s talk medical devices for a minute…. I just have this new bad boy a try and let me tell you…. It’s AMAZING. 

According to the American Sleep Association, the repetitive breathing pauses caused by sleep apnea during the nights can occur several times per hour and last for over 10 seconds. Checkme™ O2 Max wrist oxygen monitor can work as a monitor, tracks your overnight oxygen levels and heart rates, so you can view your night data in the day.

In the middle of the night if your oxygen falls too low you receive an alarm telling you to wake up and breath.  The soft silicone sensor makes it easy to sleep while on your wrist.  Also can be worn durning the day. You also can manually set your HR so that you can keep track of how your heart is doing. 

Using their app, you get great records of all results. 

The device can store 4 sessions data, up to 10 hours for each. 

I love that Check 02 not only records your HR and Sp02 but  it also records night movement and data history on your smartphone and share the information with your doctor. How cool is that? 

Because of this amazing product I was able to find out that my oxygen dropped to 83% while sleeping. I also had a heart rate of 139 with a PAC (Premature atrial contractions). 

If it couldn’t get any better. It stays charged for 70hours. Wow!! 

For someone like myself this gadget is a life saver. I’m able to to see my numbers and determine if I need to relax or start my infusion. 

I’m very impressed with it and grateful for its help. If you just want to keep track of your health, HR or oxygen level then this is your device. But this also is great to share detailed result with your doctor with a press of a button to your email or face to face. If you think you may have sleep apnea this can track that and help your doctor with his thoughts on that diagnosis. 

It also gives you 2-minute sampling rather than 4 minutes. It can also  be set for a sound alert if the sensor comes off your thumb, which I don’t ever see happening. 

But I am now aware of all of the alerts while sleeping and or awake. Making me feel comfortable to live my life with chronic illness.

Great monitor with helpful support

Stephen P.


I have bought and owned at least 4 different spo2 monitors such as checkme doctor, checkme max, checkme be4 max, i own all and have tested them all and they all matched readings from 1 hand using at same time on different fingers

and can say there accurate i got my 1st 1 in 2019 and then bought a family member the new max model in may2021 due to there ill health and due operations on there lungs and a weak heart

The max model has spo2 monitor plus a pulse rate monitor which both have an alarm system when they drop below a certain level then it beeps and vibrates

Support are very helpful with replacements when it comes to replacement charge/data cables or of finger sensors am a restless sleeper and due this sensors have malfunctioned and wellue have kindly replaced sensors as there warranty and guarantee is for a full year from purchase and there fast to reply within 24 hours so am very happy with there support system.

Learn more about checkme o2

Great Device and easy to use.

Jose M.


This device is of very high quality. Comfortable on the finger and the wristband.
Software interfaces once you open the app and downloads your nightly results automatically. This is a medical grade device with data that quite honestly could add years to your life because sleep apnea as a result of an airway restriction (snoring) is detrimental to your cardio muscle. The SPo2 alarm can be set for audio or vibrational mode and I learned that my snoring issue only occurred when I slept on my back with resultant jaw opening.

5 star product and any questions are immediately answered by product support.

Provides Good CPAP Corroborating Info

Philip A.


I use the Checkme O2 Max to confirm the information provided my ResMed AirSense-10 CPAP machine. It is nice to be able to see that the info from the two devices almost always confirms each other’s report. Yes, the device is a bit pricey, but its a real bargain compared to a local health supplier who charges $50 for a one-night recording oximeter test. To provide full disclosure, I am a hopeless addict to home healthcare electronic devices. 😉

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