FIELD: medicine.
SUBSTANCE: group of inventions relates to medical equipment. Patient mask optically indicates the need to replace the patient mask element due to wear to the user. In particular, this refers to the element for the patient mask, which contains at least one functional material, having specified functional characteristics, and at least one indicator, the concentration of the specified at least one indicator in the specified element is correlated with predetermined functional characteristics of the specified at least one functional material.
EFFECT: optical indication of the need to replace the patient mask element due to wear to the user.
16 cl, 11 dwg
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|
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|
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|
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|
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|
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|
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|
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| PATIENT INTERFACE DEVICES | 2013 |
|
RU2641836C2 |
