• By Clay Rollyson
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ResMed is the leader in the sleep therapy world, and CPAP masks are no exception to that. They have now launched the AirFit F40 Full Face. This is a minimal contact full face mask which are very popular today. In this blog we will introduce you to all the details of the F40. From setup and fitting to maintenance and our comparison and review of the F40. Now, let’s jump right in on those details.

AirFit F40 Fitting Guide

Getting a good start on any mask is the most important factor. A bad start or bad fitting at the beginning will lead to bad outcomes on the mask. With the F40 getting it fitted right will allow you to find out if it is a good fit for you. The single biggest thing to remember on this mask is that it seals UNDER the nose and over the mouth. We have had many customers trying to get the seal over the bridge of their nose, and that is not what this mask is designed to do. Now let’s look at the proper way to get a great fit on the F40 step by step.

AirFit F40 Fitting process:

  1. Twist and pull both magnetic clips away from the frame magnets.
  2. Place the F40 cushion under your nose and ensure it sits comfortably against your face. With the ResMed logo on the headgear facing out, pull the F40 headgear over your head. The top headgear strap should sit on top of your head and not too far forward or back.
  3. Bring the lower headgear straps under your ears and attach the magnetic clips to the frame.
  4. If the mask needs adjusting, undo the fastening tabs on the upper headgear straps and pull evenly. Repeat with the lower headgear straps.

AirFit F40 Cleaning Instructions:

Keeping up with your mask will improve the longevity and dramatically improve the performance. The AirFit F40 mask cushion should be maintained daily, and the entire F40 assembly needs to be maintained weekly. If you stay on track with this process, you will see much better comfort and performance over a much longer period of time.
  1. Soak the components in warm water with a mild liquid detergent like CPAP Soap. Ensure that there are no air bubbles while soaking.
  2. Shake the components vigorously in the water and hand wash with a soft bristle brush. Pay particular attention to the vent holes in the QuietAir/Multi-hole vent ring.
  3. Thoroughly rinse the components under running water.
  4. Squeeze the fabric components to remove excess water.
  5. Leave the components to air dry out of direct sunlight. If the mask components are not visibly clean, repeat the cleaning steps.
  6. Make sure that the vents and anti-asphyxia valves are clean and clear. This flap can get a little sticky if not kept clean.

AirFit F40 Sizing Options:

The AirFit F40 is in many ways the newest version of the F30. One huge issue with the F30 was that there was no large size. The new F40 not only has added a large cushion option, but also has a small and large headgear option. Those improvements give the F40 a 98% fit range according to ResMed’s fitting study.
  • F40 Cushion Sizes: Small/Wide, Medium, and Large. Use this fitting template here to see which size F40 Cushion works best for you.
  • F40 Headgear Sizes: Small, Standard, and Large. Most of the time you will have a standard F40 headgear included with your mask, but if it is too loose or too tight, then you can go with the small or large option for a better fit.

F40 Review and Comparison:

To me the F40 is the upgraded version of the F30 by ResMed. I say this because the F40 is very similar to the F30 and the obvious transition from 3 to 4 in the name pretty much defines that. That mean that many of the positives on the F40 are what you might call upgrades from the F30. The F30 has been super popular and so an upgraded or 2.0 version (ie: F40) is certainly worth a hard look for CPAP users.

AirFit F40 Pros:

  • Much better fit and seal– The AdaptiSeal cushion is super-flexible and does a really nice job of contouring to your unique face.
  • Simpler headgear– The new headgear on the F40 only has 4 points of adjustment as opposed to the 5 points on the F30. Much easier to fit and adjust. It is also very soft and comfortable.
  • Fully Flexible frame– What good is the flexible cushion if it were installed in a rigid frame. That is why the F40 introduced a very flexible frame that will also allow for a much more comfortable fit. It also makes it very durable and hard to break.
  • Very nice exhalation diffuser– The QuietAir exhalation ring makes the F40 very quiet and makes the draft almost nothing.

AirFit F40 Cons:

  • Front of nose leak– The F30 had some minor reporting of leaks at the front of the nose on the cushion. The F40 has a similar fit and in demos of the F40 performance did show that on my wife specifically. It fit me great with no leaks, but she could not get it to seal for her.
  • Bridge on nasal opening can be weird– Some users have reported that the bridge in the middle of the nasal opening can block a nostril at times. Not an issue we hear terribly often, but it has been reported.

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  • By Clay Rollyson
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How to connect Oxygen to your CPAP Machine

Can Oxygen be connected to a CPAP machine?

Yes it can. In cases where your Doctor has prescribed both Oxygen Therapy and CPAP Therapy, those two Therapies can be combined using a simple Oxygen Bleed-In Connector. However, there are some cases that can make that connection a little trickier. It is important to always consult with your Doctor regarding your Oxygen and CPAP needs.

How to Connect Oxygen to the CPAP with a Bleed-in connector

The Bleed-in connector is the simplest way to combine Oxygen and CPAP. This connector usually connects between the outflow of the CPAP and the CPAP tubing. Then, you connect your Oxygen Tubing to the smaller nipple on the side of the Bleed-in Connector. It can also be connected between the end of your CPAP Tubing and the CPAP Mask. If you decide to connect it with the second method, then you will have two tubes coming to your CPAP mask. It can be good to use tape or some sort of strap to keep the two tubes together to make sure that the oxygen tube does not disconnect at night. With both of these options you will want to make certain that your Oxygen Concentrator is set at the prescribed setting from your Doctor. If you are unsure of that setting, you should consult with your Doctor immediately.

How to Connect Oxygen to a CPAP with heated tubing

If you use Heated Tubing on your CPAP machine, then connecting your oxygen can be a little trickier. There are two methods for making this connection happen.
  1. The first would be similar to the second option that we described above. You would need to place the Bleed-in connector in between the CPAP Mask and the end of the CPAP Tube. Then connect your Oxygen Tube in to the smaller nipple on the side of the Bleed-in connector.
  2. The second option would be for you to purchase a Heated Tube with a built in Oxygen connector. For instance, the AirSense 10 and AirCurve CPAP from ResMed have a ClimateLineAir Oxy Tube available. That particular heated tubing has a built-in oxygen port so that you can connect the Oxygen directly into the elbow of the Heated Tubing. If your CPAP Machine does not have this option then you will have to use the first method described above.

How to get Oxygen for a CPAP Machine

The first step in the process is to consult with your Doctor. In many cases a Doctor that is concerned about your Oxygen levels they may issue an Oximetry Test. That test is usually worn overnight at the same time as wearing your CPAP. It records your oxygen levels throughout the night so that the Doctor can determine what your oxygen level are doing at night. If the Doctor determines that your oxygen levels are too low, even on your CPAP, then the Doctor may order Oxygen to be bled into your CPAP. In this case you would more than likely need to obtain an Oxygen Concentrator and it would be set at a prescribed Liter Flow. Then, that Oxygen Concentrator would be connected to your CPAP using one of the methods described previously in this blog. If you are purchasing your own Oxygen Concentrator be sure that it is a Continuous Flow model instead of a Pulse Dose Oxygen Concentrator. Most of the Smaller Portable Oxygen Concentrators are “pulse-dose” and will not work for bleeding into CPAP.
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