US Patent 9757536 Soft tip cannula

The present disclosure describes numerous example medical instruments that include an elongated portion having a proximal end and a distal end, and a passage defined therethrough and a soft tip coupled to the distal end of the elongated portion. The tip may be formed from a soft material. In some instances, the soft material may have a hardness less than the material forming the elongated portion. The tip may also include a passage that may be of a substantially equivalent size as the passage of the elongated portion. The tip may be coupled to the distal end of the elongated portion at an engagement site having a surface area greater than a cross-sectional area of the elongated portion.