SUBCUTANEOUS INJECTION SET FOR USE WITH A RESERVOIR THAT HAS A SEPTUM

摘要

An infusion set (100) includes a needle hub (206) with a needle to be inserted in a through passageway of the cannula housing (202) through a sealing surface of a soft cannula (204). The infusion set included a guide (242) for centering the needle relative to the cannula sealing surface, a dirt trap, and the through passageway, as well as a locking device (252, 254) for locking the cannula housing and the needle hub together to prevent inadvertent disengagement. The guide includes co-operating guide pins (216, 218) and guide openings (244, 246) and a draft angle of the needle hub (206). The pins are located on each side of the needle and the through passageway. The connecting tube (130) includes an inner tube of polyethylene and shrink fitted tubing (132) 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.