1) Because the body of the unit is wider (like an egg in the middle), air velocity is reduced in the center of the nasal aspirator. This creates a 'break', where air flow is insufficient to pull heavier mucus droplets up to the suction tube. This effect has been confirmed by independent testing.
2) Lightly-wadded tissue inserted into the body of the nasal aspirator creates a tortuous path and functions as an effective and disposable filter.
Why is tissue better than foam rubber as a Filter? We have seen similar products with a foam rubber filter and it is important to point out why cellulose tissue (regular household tissue) is a more effective and safer filter for use in the nasal vacuum aspirator.
- The pore size of standard 'Kleenex' type tissue is around 1/10,000 of an inch. The pore size of standard open cell foam rubber is in the range of 1/500 inch. Tissue pores are approximately 20 times smaller than foam rubber and therefore are more effective as filter membranes.
- An important criterion of filtration is the absorption properties of the material. Foam rubber is a plastic, therefore on the molecular level, there is much less surface area for absorption. Tissue is cellulose, a natural material and has vastly greater molecular surface area than plastic. Think of how well paper toweling absorbs water as opposed to plastic. The same principle applies here.
BPA & PHTHALATE FREE | DISHWASHER SAFE | PATENT PENDING | MADE IN USA