Abstract: A reusable tampon includes an interior cavity which can be filled with absorbent material. The absorbent material can be removed and new absorbent material inserted in its place through an opening in an upper portion of the tampon. The tampon has a body which is hollow and formed of flexible, human tissue-friendly material. The lower part of the body is closed and has a semi-circular shape. Inflow apertures in the body of the tampon are inclined inwardly and toward the semi-circular lower portion of the body, allowing menstrual blood to pass into the interior cavity. Axially extending inflow grooves may also be provided. The tampon may have an elliptical cross-section, and a plurality of small balls of highly aborbent material may be disposed in the interior cavity.

Abstract: A cannula includes a protective device mounted internally in a fixed position in the cannula chassis. The protective device includes internally a latching and locking system which functions to automatically apply the protective device to the front part, the point, of the cannula injection needle when the injection needle is retracted manually so as to separate it from the cannula chassis. When the protective device has been applied and locked firmly to the front part, the point, of the injection needle, the protective device is released from its fixed position and separated from the cannula chassis by application of an appropriate manual retroaxial pulling force. When the latching and locking process is activated, the cannula injection needle is deformed. Thus the cannula is for one-time use only, since the deformed injection needle cannot be reused.