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Short answer: after a total laryngectomy a person breathes through a neck stoma, and a laryngectomy HME (heat and moisture exchanger) is a small device worn over that stoma to condition the air breathed in. One randomized trial of a foam HME found less coughing and forced expectoration, and fewer stoma cleanings per day, with more breathlessness on stairs. This page is general product information, not medical advice.
What a heat and moisture exchanger is after a laryngectomy
A heat and moisture exchanger (HME) is a passive device that holds on to some of the heat and moisture in exhaled air and returns it to the next breath in. Atos Medical, a manufacturer, describes its Provox Life range as HMEs that "mimic the function of your upper airways", and explains the need plainly: "Since you breathe through your neck stoma, it is important to protect your airway upon inhalation." (Atos Medical product page.)
Searchers use two phrasings for the same thing: laryngectomy HME and heat moisture exchanger laryngectomy both point to this device category. It is a supply item that sits with the other stoma and speech accessories, such as the devices covered in our guides to the Blom-Singer voice prosthesis and the electrolarynx.
How it works
The trial described below used a Provox HME, which the authors describe as a porous foam treated with calcium chloride, plus a lid that helps to occlude the stoma. The foam captures heat and moisture from exhaled air and uses it to condition the air inhaled on the next breath (Eur Arch Otorhinolaryngol, PMC2811241). The wider-than-standard diameter of the Provox Life HMEs is described by the manufacturer as a balance between humidification and ease of breathing.
This page does not describe how to fit, change or clean a device. Those steps are in the manufacturer's instructions for use (IFU) and in teaching from the person's clinical team.
Types by use situation
Atos Medical lists six interchangeable Provox Life HMEs, each described by the situation it is made for. The table restates the manufacturer's own descriptions and is not a ranking or a recommendation.
| Variant | Stated purpose (Atos Medical) |
|---|---|
| Provox Life Home | For use at home when not breathing deeply; the highest humidification of the daytime HMEs |
| Provox Life Go | Lower breathing resistance with a low, discreet profile; for use outside the home |
| Provox Life Night | High humidification; described as helping to reduce coughing and mucus at night |
| Provox Life Protect | For travel and outdoors; warms and humidifies the air and filters bacteria, viruses, dust and pollen |
| Provox Life Energy | Good humidification with low resistance; for physical activity |
| Provox Life FreeHands | Used with the FreeHands Flexivoice for hands-free speech |
The pattern across the range is a trade-off between humidification and breathing resistance: the Home and Night variants emphasise humidification, while Go and Energy emphasise low resistance. This is a reading of the manufacturer's wording, not a clinical finding.
What the trial evidence shows
The main independent evidence this page uses is a randomized controlled trial of a Provox HME after total laryngectomy (published online 2009, in print 2010). It enrolled 80 long-term laryngectomized patients, more than six months after surgery, 40 using an HME and 40 as controls, followed for three months over winter in Poland; 36 patients in the HME group were analyzed.
- Coughing and forced expectoration fell significantly in the HME group (P < 0.001 for both), with a larger reduction among patients who used the HME fully.
- Stoma cleaning became less frequent (P = 0.001), from about 2.8 to about 2.1 times a day.
- Shortness of breath when climbing steps increased in the HME group, which the authors attribute to the added breathing resistance.
- Changes in sleep and fatigue were not significant.
This was one trial of one brand, so it shows what happened with that device in that group and does not compare brands.
How this differs from a tracheostomy HME
Our guide to the HME filter for a tracheostomy covers devices attached to a tracheostomy tube. The laryngectomy case in this page is different in what it attaches to: the manufacturer's description is of a person who breathes through a neck stoma, and the device is designed for that. For the tube itself, see what a tracheostomy tube is.
Where it matters for clinics and supply records
The following fields are what a supply record can capture so that the right item is identifiable. They are things to look up in the IFU, not purchasing advice.
- The device range and variant name (for example, Provox Life Night rather than "HME"), because the manufacturer treats the six variants as distinct products with different stated purposes.
- Whether the variant is meant for use with an accessory such as the FreeHands Flexivoice, as the FreeHands variant is.
- Compatibility with the housing or baseplate in use, as stated in the IFU.
- Lot number and expiry date from the packaging.
The manufacturer page does not state a change interval, so none is given here; the IFU governs.
Common misunderstandings
- "An HME is the same as a voice prosthesis." No. The HME conditions inhaled air; speech devices are separate products.
- "All HMEs are interchangeable." The manufacturer describes six variants for different situations, and the trial noted added breathing resistance as a real trade-off.
FAQ
What is a laryngectomy HME?
It is a heat and moisture exchanger worn over the stoma after a laryngectomy to warm and humidify inhaled air, using a foam that retains heat and moisture from exhaled air.
What does a heat moisture exchanger do for laryngectomy patients?
In the randomized trial above, HME users had significantly less coughing and forced expectoration and cleaned the stoma less often, but reported more breathlessness climbing steps.
Are there different HMEs for day, night and exercise?
Atos Medical lists separate Provox Life variants for home, going out, night, travel and outdoors, physical activity and hands-free speech.
How often is an HME changed?
The manufacturer's product page and the trial do not state an interval. Follow the device's instructions for use and clinical team guidance.
Sources
- Atos Medical, Provox Life Heat and Moisture Exchangers, https://www.atosmedical.com/laryngectomy/provox-life/provox-life-heat-and-moisture-exchangers. Checked 2026-10-30.
- "The effect of a Heat and Moisture Exchanger (Provox HME) on pulmonary protection after total laryngectomy", Eur Arch Otorhinolaryngol, https://pmc.ncbi.nlm.nih.gov/articles/PMC2811241. Checked 2026-10-30.
