Importance

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Abstract

A device for infusing a drug into an ambulatory patient, the drug being contained in a transparent spiral conduit which is embedded in a disposable flexible casting conformingly adhered to the patient's body, includes a reusable micropump module which is detachably mounted in a collar valve on the casting and forces oxygen into the conduit under pressure to expel the drug into a semi-pivoting cannula inserted into the patient's body. A colored oil drop between the oxygen and the drug in the conduit provides a visual indication of drug quantity, while a filter with hydrophobic and hydrophylic membranes keeps the oxygen and oil substantially out of the cannula. A test button sounds an alarm when the device is ready for use and a pressure sensitive switch automatically sounds an alarm and shuts off the pump if the drug becomes completely discharged from the conduit or if the drug delivery system becomes occluded and an interlock switch completes the circuit between the pump and a power source when the reusable module and disposable casting are joined.

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First Claim