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An implantable drug delivery apparatus including a housing that has a housing chamber. An outer deformable body having a reserve chamber is mounted within the housing chamber. An inner deformable body having a dispensing chamber is mounted within the reserve chamber. A dispensing valve is actuated t

An implantable drug delivery apparatus including a housing that has a housing chamber. An outer deformable body having a reserve chamber is mounted within the housing chamber. An inner deformable body having a dispensing chamber is mounted within the reserve chamber. A dispensing valve is actuated to an open position to allow a fluidic drug to flow from the dispensing chamber, through the dispensing valve and through a catheter into a body of a patient. The fluidic drug is discharged from the dispensing chamber at a dispensing mass flowrate which is greater than a refilling mass flowrate of the fluidic drug passing from the reserve chamber to the dispensing chamber, when the dispensing valve is in an open position. When the dispensing valve is in a closed position, the fluidic drug is prevented from discharging from the dispensing chamber while a recharging amount of the fluidic drug is capable of flowing from the reserve chamber to the dispensing chamber, until the dispensing chamber is at least partially filled. The outer deformable body is normally forced or urged in a direction or manner that tends to reduce a volume of the reserve chamber.

대표청구항 ▼

An implantable drug delivery apparatus comprising: a housing having a housing chamber, an outer deformable body having a reserve chamber, said outer deformable body mounted within said housing chamber, an inner deformable body having a dispensing chamber, said inner deformable body mounted within sa

An implantable drug delivery apparatus comprising: a housing having a housing chamber, an outer deformable body having a reserve chamber, said outer deformable body mounted within said housing chamber, an inner deformable body having a dispensing chamber, said inner deformable body mounted within said reserve chamber; a dispensing valve, a catheter in communication with a valve discharge of said dispensing valve; flow means for discharging a fluidic drug from said dispensing chamber at a dispensing mass flowrate which exceeds a refilling mass flowrate of said fluidic drug passing from said reserve chamber to said dispensing chamber when said dispensing valve is in an open position, and for preventing said fluidic drug from discharging from said dispensing chamber and allowing said fluidic drug to flow from said reserve chamber to said dispensing chamber until said dispensing chamber is at least partially filled when said dispensing valve is in a closed position; and force means for normally urging said outer deformable body in a manner that tends to reduce a volume of said reserve chamber.