초록 ▼

An apparatus for accurately infusing fluids into a patient at specific rates over an extended period of time. The apparatus is of a low profile, laminate or layered construction having a stored energy source in the form of a distendable membrane, which, in cooperation with the base of the apparatus,

An apparatus for accurately infusing fluids into a patient at specific rates over an extended period of time. The apparatus is of a low profile, laminate or layered construction having a stored energy source in the form of a distendable membrane, which, in cooperation with the base of the apparatus, defines one or more fluid reservoirs, each having a fluid inlet and a fluid outlet. The apparatus further includes, a high novel, conformable ullage made of yieldable materials. The conformable ullage uniquely conforms to the shape of elastomeric membrane as the membrane returns to its less distended configuration. Additionally, the infusion cannula of the apparatus is connected to the base in a novel manner which permits expeditious subdermal delivery to the patient via a cannula which extends generally perpendicularly relative to the base. The cannula is connected to the base in a manner such that the pierceable portion of the cannula is free to move relative to the base of the device in response to movements by the patient which cause flexing of the muscle and tissue in the vicinity of the cannula.

대표청구항 ▼

A fluid delivery device for use in subdermal delivery of fluid to a patient at a controlled rate comprising: (a) a base having an upper surface and a lower surface engageable with the patient and a channel formed in said base intermediate said upper and lower surfaces, said channel having first and

A fluid delivery device for use in subdermal delivery of fluid to a patient at a controlled rate comprising: (a) a base having an upper surface and a lower surface engageable with the patient and a channel formed in said base intermediate said upper and lower surfaces, said channel having first and second ends; (b) stored energy means for forming in conjunction with said base, a reservoir having an outlet, said stored energy means comprising at least one distendable membrane superimposed over said base, said membrane being distendable as a result of pressure imparted by fluids introduced into said reservoir to establish internal stresses, said stresses tending to move said membrane toward a less distended configuration; (c) infusion means for infusing medicinal fluid from said fluid reservoir into the patient, said infusion means comprising a hollow cannula having: (i) an inlet end portion disposed proximate said first end of said channel; (ii) a central body portion disposed within said channel formed in said base; and (iii) an end portion having a first segment movably disposed within said channel and a second segment comprising a pierceable portion extending outwardly from said second end of said channel for insertion into patient; and (d) cannula encapsulation means for encapsulating and immovably constraining said central body portion of said hollow cannula within said channel and for dynamically supporting said end portion of said cannula.