Mask frame, cushion, and headgear not included.
Every vented CPAP mask continuously releases exhaled air through vent holes. On a standard elbow, that air leaves as a fairly focused stream — which some users find drafty, and which is a classic complaint from partners sleeping next to a CPAP user.
The diffused elbow addresses exactly that. Its diffuser spreads the exhaust across a wider area at lower velocity, so the same amount of air is vented but you feel and hear far less of it. Nothing about the therapy changes — only how the exhaled air is released.
It's also a wear part. The elbow is connected, disconnected, and washed daily, so it eventually cracks, discolors, or loosens at the tubing connection. This genuine ResMed replacement restores both a secure fit and proper venting.
| Specification | Detail |
|---|---|
| Product type | Replacement mask elbow (diffused) |
| Compatible mask | ResMed Mirage Micro (nasal) |
| Venting | Diffused |
| Included | Elbow only |
| Related part | Standard elbow assembly (16399 — elbow + swivel) |
| Prescription | Not required |
| ResMed reference / SKU | 16387 |
| Brand | ResMed |
Wash the elbow weekly in warm water with a mild detergent, rinse thoroughly, and air dry away from direct sunlight. Never block, tape over, or modify the vent or the diffuser — venting is what clears exhaled air from the mask. Check that the vent area is clear each time you clean, and replace the elbow if it's cracked, discolored, or no longer holds the tubing securely.
What makes it "diffused"? The diffuser spreads the vented air over a wider area at lower velocity, so exhaust is quieter and less drafty than with a standard elbow.
Will it change my therapy pressure? No — it changes how exhaled air is released, not the therapy itself.
Which mask does it fit? The ResMed Mirage Micro nasal mask.
What's the difference between this and the elbow assembly (16399)? 16399 is the standard elbow assembly (elbow + swivel) for the Mirage SoftGel, Activa LT, and Micro; 16387 is the diffused elbow version for the Micro. Confirm which one your setup uses.
My partner complains about the airflow — will this help? That's exactly what the diffused design is for: it disperses the exhaust rather than releasing a focused stream.
Do I need a prescription? No — replacement mask parts like this do not require a prescription.
Can I get it delivered in Brooklyn or shipped nationwide? Yes — Task Supply Corp offers USPS shipping throughout the continental U.S., plus local pickup and delivery in Brooklyn and all five boroughs of New York City.
Use this part with your ResMed Mirage Micro mask according to the mask's user guide. Do not block or modify the vent or diffuser.