| 摘要 |
An infusion set includes a needle hub with a needle to be inserted in a through passageway of the cannula housing through a sealing surface of a soft cannula. The infusion set includes a guide for centering the needle relative to the cannula sealing surface, a dirt trap, and the through passageway, as well as a locking device for locking the cannula housing and the needle hub together to prevent inadvertent disengagement. The guide includes co-operating guide pins and guide openings and a draft angle on the needle hub. The pins are located on each side of the needle and the through passageway. The connecting tube includes an inner tube of polyethylene and shrink fitted tubing at each end suitable for a solvent bonding layer. The composite can be reinforced with monofilament strands sandwiched between the two tubular layers to prevent kinking, or the inner tube can be formed in a triangular shape. The triangular shape composite is incased in a thin polyester shrink tube.
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