| 摘要 |
A nasal filter device which is sized for containment within a single nostril of a human or mammal. The device has a tapered main body with a correspondingly tapered inner passage. The main body is preferably formed from a compressible material such as silicone, the material being sufficiently malleable to conform to the inner surfaces of the nostril. The inlet end of the main body is normally substantially annular but sufficiently compressible for sealing engagement with the edges of the nasal orifice. An extraction handle is provided at the outlet end to facilitate extraction of the device. The extraction handle may be hinged and sized for snap fit engagement with an annular recess provided at the inlet end of the device. A key feature of the invention is the use of a series of progressively larger annular ribs to positionally stabilize the device. The ribs are vertically spaced along the length of the device, with the first and largest rib extending radially about the inlet end. At least two types of removable filters are adapted for insertion into the interior portion of the device.
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