Abstract: A subcutaneous injection set is disclosed of the type having an insertion needle for quick and easy subcutaneous placement of a soft cannula through which medication can be delivered to a patient. In one preferred form, the subcutaneous injection set comprises a base adapted for press-on attachment to the skin of a patient at a selected infusion site. The base includes a connector sleeve for connecting a length of infusion tubing to the soft cannula. The soft cannula is threaded through an eye formed near the distal end of the insertion needle which is mounted on a collapsible injector that is detachably mounted to the base. The base is positioned on the patient's skin, the injector is collapsed by pressing toward the patient's skin whereby the insertion needle pierces the skin for transcutaneous cannula placement. The press stroke of the insertion needle is sufficient to unthread the cannula therefrom, whereupon the injector can be retracted to withdraw the insertion needle from the patient.

Abstract: A unitary piston cap and boot seal for use in a medication infustion system is disclosed which is mounted on a rigid piston contained in a cylinder disposed in a cassette. The piston cap and boot seal, which are made of a flexible, elastomeric material, effectively both form the pumping element disposed in the cylinder, and prevent contamination of the pump through use of a rolling seal. The device may be sterilized by gas, since a tortuous path affording passage to gas is included in the retaining skirt mounted around the outer diameter of the pump cylinder.

Abstract: An enclosure for use to safely secure a water-sensitive medical or electronic device such as a medication infusion pump in a water-resistant manner is disclosed which utilizes a pouch made of a sheet of thin plastic material to store the apparatus, the pouch being adhesively sealable to secure the device. The enclosure also includes a perforated area which may be opened to form a strap to carry or hang the device, and is constructed inexpensively to be of a disposable nature.

Abstract: An injection set for delivering a fluid to a subcutaneous injection location in a patient is disclosed which has a soft cannula projecting from a bottom surface of a holding pad. An insertion needle is initially inserted through a septum located between a catheter hub and a retaining cap mounted on the holding pad. The insertion needle extends through a fluid chamber defined by the septum and the catheter hub and then through a lumen of the soft cannula, with the sharpened tip of the insertion needle extending beyond the end of the soft cannula when the insertion needle is fully inserted. The insertion needle, which allows priming of the injection set, may be removed following installation of the injection set without kinking of the soft catheter, and fluid may be supplied to the injection set for delivery to the patient.

Abstract: An injection set for use with an external infusion source of fluid such as insulin is disclosed which injection set is constructed using multiwall tubing. The interior of the multiwall tubing is made of a material which is completely insulin compatible, while the exterior of the multiwall tubing is made of a material which may be solvent bonded. The multiwall tubing facilitates solvent bonding installation of an insert molded needle assembly and a connector to the ends of the tubing without necessitating the use of and incurring the disadvantages of epoxy bonding.