Injection set for intermittent or continuous administration of therapeutic substances

摘要

The present invention is an infusion set for intermittent or continuous administration of a therapeutic substance such as insulin, the infusion set comprising a cannula housing (1) having a soft plastic cannula (2) to be placed in the body of a patient, wherein the cannula And form a direct passage together with the cannula housing 1, the inlet of the passage into the cannula housing 1 being covered by a membrane. The infusion set also includes a needle hub 3 with a needle to be inserted into the direct passage of the cannula housing through the membrane. The infusion set comprises guide means for centering the needle with respect to the membrane and the direct passage, and locking means 31, 32 for releasably locking the cannula housing 1 and the needle hub 3 together. . In the assembled state, the cannula housing 1 and the needle hubs 3 and 41 provide a relatively flat back surface 6 and a relatively large width in a direction parallel thereto and substantially perpendicular to the longitudinal central axis of the straight passage. do. The guiding means are cooperating guide pins and guiding openings 15 and 16 on each side of the needle and the direct passage, the locking means being disposed on each side of the needle on the needle hub and comprising barbs 33 and 34. Elastic locking pins 31 and 32, the locking pins having a barb adapted to be housed in respective grooves in the cannula housing 1, wherein the grooves are fitted with the barbs 33 and 34. Shoulders 25 and 26.