Abstract
Background: Due to the heat and moisture exchanger's (HME) breathing resistance, laryngectomized patients cannot always use an (optimal) HME during physical exercise. We propose a novel HME cassette concept with adjustable “bypass,” to provide adjustment between different breathing resistances within one device. Methods: Under standardized conditions, the resistance and humidification performance of a high resistance/high humidification HME (XM) foam in a cassette with and without bypass were compared to a lower resistance/lesser humidification HME (XF) foam in a closed cassette. Results: With a bypass in the cassette, the resistance and humidification performance of XM foam were similar to those of XF foam in the closed cassette. Compared to XM foam in the closed cassette, introducing the bypass resulted in a 40% resistance decrease, whereas humidification performance was maintained at 80% of the original value. Conclusions: This HME cassette prototype allows adjustment between substantially different resistances while maintaining appropriate humidification performances.
Original language | English |
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Pages (from-to) | 1073-1087 |
Number of pages | 15 |
Journal | Head and Neck |
Volume | 43 |
Issue number | 4 |
DOIs | |
Publication status | Published - Apr 2021 |
Funding
We would like to thank Atos Medical AB (Malmö, Sweden) for providing the HMEs to The Netherlands Cancer Institute – Antoni van Leeuwenhoek. Also, we would like to thank the Verwelius 3D lab of The Netherlands Cancer Institute for making the 3D-printing of the HME cassettes possible. The Netherlands Cancer Institute's Department of Head and Neck Oncology and Surgery receives a research grant from Atos Medical AB (Malmö, Sweden), which contributes to the existing infrastructure for quality of life research of the Department of Head and Neck Oncology and Surgery.
Funders | Funder number |
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Antoni van Leeuwenhoek | |
Atos Medical AB | |
Netherlands Cancer Institute | |
Netherlands Cancer Institute's Department of Head | |
Verwelius 3D lab of The Netherlands Cancer Institute |