Delivery system for injection through zone of body

摘要

A dispensing device which disperses medicate through a needle across a zone within a body with zero pressure differential. The device includes a needle which is, during use, becomes encapsulated within a tubular needle-receiving member, a therapeutic agent reservoir in fluid communication with the needle, positioned within said housing, and in communication with the needle, a second reservoir, a reservoir-connecting conduit in communication with the therapeutic agent reservoir, a fluid drive in communication with the fluid in the second reservoir and in communication with said reservoir-connecting conduit, and a linear drive attached to said needle or to said needle-receiving member.

主权项

1. A distributed injection device, comprising
a needle, said needle having an attachment end and an injection end, said needle having a needle outer diameter, and said needle having an internal cross-sectional area, said needle having a needle longitudinal axis; a housing including a needle-receiving member, said needle-receiving member being tubular, said needle-receiving member having an open first end, said needle-receiving member having a needle-receiving member inner diameter, said needle-receiving member inner diameter greater than said needle outer diameter, said needle-receiving member having a needle-receiving member longitudinal axis, said needle longitudinal axis and said needle-receiving member longitudinal axis generally parallel, said needle-receiving member circumscribing said needle longitudinal axis; a therapeutic agent reservoir adapted to contain a therapeutic agent, said therapeutic agent reservoir in fluid communication with said needle via a tubing, said therapeutic agent reservoir positioned within said housing; a second reservoir adapted to contain fluid; a reservoir-connecting conduit, said reservoir-connecting conduit in communication with said therapeutic agent reservoir; a fluid drive in communication with said fluid in said second reservoir, said fluid drive in communication with said reservoir-connecting conduit; and a linear drive associated with said needle or said needle-receiving member; said linear drive adapted to provide a linear displacement of said needle towards said housing, or to provide a linear displacement of said needle-receiving member away from said housing, the product of said linear displacement and internal cross-sectional area of said needle providing a volume of displacement, said volume of displacement per unit time providing a flow rate; wherein said fluid drive adapted to impel fluid from said second reservoir to said reservoir-connecting conduit and to drive said therapeutic agent from said therapeutic agent reservoir at said flow rate during said linear displacement of said needle towards said housing, and wherein said fluid communication from said therapeutic agent reservoir to said needle is maintained by said tubing during operation of said linear drive to provide a linear displacement of said needle towards said housing, or to provide a linear displacement of said needle-receiving member away from said housing.