Delivery system for injection through zone of body

• US 20120065618A1
• Filed: 11/17/2011
• Published: 03/15/2012
• Est. Priority Date: 07/07/2008
• Status: Active Grant

• Current Assignee: Gabriel Institute, Inc.
• Original Assignee: Gabriel Institute, Inc.
• Inventors: Stearns, Stanley D., Loy, H. Max Jr., Davis, Donald G.
• Granted Patent: US 9,022,987 B2
• Time in Patent Office: Days
• US Class Current: 604/506
• CPC Class Codes: A61M 2202/049 Toxic
• CPC Class Codes: A61M 2205/3334 Measuring or controlling the flow rate
• CPC Class Codes: A61M 2206/20 having means for promoting or enhancing the flow, actively or passively
• CPC Class Codes: A61M 5/16886 for measuring fluid flow rate, i.e. flowmeters
• CPC Class Codes: A61M 5/172 electrical or electronic A61M5/16804, A61M5/16831 take precedence
• CPC Class Codes: A61M 5/1785 comprising radioactive shield means syringe shields or holders for storage of radioactive sources G21F5/018
• CPC Class Codes: A61M 5/2053 Media being expelled from injector by pressurised fluid or vacuum for infusion A61M5/145, A61M5/155
• CPC Class Codes: A61M 5/32 Needles; Details of needles pertaining to their connection with syringe or hub infusion needles A61M5/158; Accessories for bringing the needle into, or holding the needle on, the body A61M5/42, A61M5/46 take precedence; guide needles for catheters A61M25/065; Devices for protection of needles apparatus specially adapted for cleaning or sterilising needles A61M5/001
• CPC Class Codes: A61M 5/46 having means for controlling depth of insertion
• CPC Class Codes: A61M 5/484 Regulating injection pressure

Abstract

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.

Claims

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, said therapeutic agent reservoir positioned within said housing, said therapeutic agent reservoir in communication with said needle;

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.

2. The distributed injection device of claim 1 further comprising

a slide member, said needle fixed in position at a first end of said slide member,

said slide member slidably positioned within said receiving member;

and

said linear drive connected to said slide member.

3. The distributed injection device of claim 1 wherein

said linear drive adapted to provide a linear displacement of said needle or said needle-receiving member, 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;

and

wherein said fluid drive adapted to impel fluid from said second reservoir to said reservoir-connecting conduit at said flow rate during said linear displacement.

4. A method for a distributed injection into a body from a reservoir of therapeutic agent, comprising:

driving a needle into said body, said needle having an internal cross-sectional area;

retracting said needle from said body at a fixed velocity by a linear drive into a housing including a needle receiving member, said needle being encapsulated by said needle-receiving member during retraction, the product of said velocity and said cross-sectional area providing a flow rate;

impelling fluid from a second reservoir through a reservoir-connecting conduit to a therapeutic agent reservoir containing said therapeutic agent at said flow rate;

impelling said therapeutic agent from said therapeutic agent reservoir to said needle by displacement by said fluid at said flow rate; and

injecting said therapeutic agent from said needle into said body during retraction at said flow rate.