초록 ▼

A portable elastomeric bladder-powered infusor for dispensing drug in liquid form under pressure at a predetermined flow rate is disclosed. The main elements of the infusor are a tubular housing, a plug/flow control assembly fixed in one end of the bladder, an axially slidable piston/filling port as

A portable elastomeric bladder-powered infusor for dispensing drug in liquid form under pressure at a predetermined flow rate is disclosed. The main elements of the infusor are a tubular housing, a plug/flow control assembly fixed in one end of the bladder, an axially slidable piston/filling port assembly within the housing, and a tubular bladder. The plug and piston assemblies each has an axial post about which the bladder ends are attached. When the bladder is not charged with drug, the posts fill the bladder\s lumen and their ends abut. Drug is charged to the infusor by inserting a drug-filled syringe into the open end of the housing with the syringe\s needle entering an axial bore in the piston, penetrating a septum that blocks the bore, and extending into the axial post. The force exerted on the piston by the syringe is transmitted to the fixed plug assembly via the axial posts. Drug is plunged from the syringe causing the posts to separate and the bladder to expand axially and radially. Once the bladder is filled, the syringe is withdrawn, with the septum sealing itself. The drug is dispensed from the bladder via the plug/flow control assembly and a conduit that is connected to that assembly and extends to the infusion site.

대표청구항 ▼

An infusor for dispensing a liquid under pressure at a predetermined flow rate comprising in combination: a. a tubular housing; b. a plug fixed in one end of the housing having an aperture extending therethrough; c. a piston within the housing that is adapted to slide axially within the housing; d.

An infusor for dispensing a liquid under pressure at a predetermined flow rate comprising in combination: a. a tubular housing; b. a plug fixed in one end of the housing having an aperture extending therethrough; c. a piston within the housing that is adapted to slide axially within the housing; d. a tubular elastomeric bladder for receiving the liquid under pressure, the ends of which are sealingly attached to the plug and piston, respectively, with the lumen of the bladder communicating with the aperture in the plug; e. solid lumen filling means within the lumen of the bladder said means extending between the inner side of the piston and the inner side of the plug and substantially filling the lumen of the bladder when the bladder is deflated; f. a conduit connected to the aperture in the plug, the conduit and aperture together defining a dispensing passageway for transporting the liquid from the bladder to the infusion site; and g. a flow regulator in the dispensing passageway for permitting the liquid to flow from the bladder through the dispensing passageway at said predetermined rate.