| 摘要 |
The invention relates to a spacing device (stent) for use in fenestrations of the paranasal sinus. Said device consists of a sheath which forms a hollow body, surrounding an internal cavity. An active substance, which is released in a controlled manner by the spacing device, is contained in the sheath or in at least one layer of the sheath. The relationship q of the external diameter of the hollow body to the internal diameter of the hollow body is expressed by 1.2<=q<=3.0.
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