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  Intradermal delivery deviceUSPTO Application #: 20070021717Title: Intradermal delivery device Abstract: A delivery device for delivering a substance intradermally into the skin of a patient including a housing for contacting the surface of the skin and a disposable cartridge to be received in the housing. The cartridge includes an internal reservoir containing a substance to be delivered to the patient, a plurality of micro skin penetrating members and a fluid channel extending between the micro skin penetrating members and the reservoir. The housing includes a bottom wall with a central opening and a cover member. The cartridge is positioned in the housing with the micro skin penetrating members extending through the central opening of the bottom wall and positioned on the surface of the skin of a patient. The cover is closed onto the cartridge to dispense the substance from the cartridge through the micro skin penetrating members and into or through the skin of the patient. (end of abstract)
Agent: David W. Highet, Vp And ChiefIPCounsel Becton, Dickinson And Company - Franklin Lakes, NJ, US Inventors: Jonathan B. Gabel, Bradley M. Wilkinson, Charles G. Hwang USPTO Applicaton #: 20070021717 - Class: 604093010 (USPTO) Related Patent Categories: Surgery, Means For Introducing Or Removing Material From Body For Therapeutic Purposes (e.g., Medicating, Irrigating, Aspirating, Etc.), Treating Material Introduced Into Or Removed From Body Orifice, Or Inserted Or Removed Subcutaneously Other Than By Diffusing Through Skin, Material Introduced Or Removed Through Conduit, Holder, Or Implantable Reservoir Inserted In Body The Patent Description & Claims data below is from USPTO Patent Application 20070021717. Brief Patent Description - Full Patent Description - Patent Application Claims
CROSS-REFERENCE TO RELATED APPLICATIONS [0001] The present application is a continuation of U.S. patent application Ser. No. 10/924,118 filed on Aug. 23, 2004 which is a continuation of U.S. patent application Ser. No. 10/112,757 filed on Apr. 2, 2002, now U.S. Pat. No. 6,780,171 issued Aug. 24, 2004 and is herein incorporated in reference in its entirety. FIELD OF THE INVENTION [0002] The present invention is directed to a method and a device for delivering a substance intradermally to a patient. The invention is further directed to a microneedle delivery device having a separable cartridge containing a unit dose of a substance for delivering the substance intradermally to a patient. BACKGROUND OF THE INVENTION [0003] Subcutaneous injection devices using a cannula that penetrates deep into the skin or muscle are effective for delivering a pharmaceutical or other substance to a patient. However, the pain normally induced by the cannula has prompted the development of less painful delivery methods. Recently, a number of intradermal devices have been designed in which microneedles are adapted to penetrate the skin to an intradermal depth at which a drug or pharmaceutical agent can be delivered to the patient and at which the microneedles do not cause pain or significant discomfort to the patient. [0004] The skin is made up of several layers, with the upper composite layer being the epithelial layer. The outermost layer of the skin, the stratum corneum, has well known barrier properties to prevent molecules and various substances from entering the body and analytes from exiting the body. The stratum corneum, which is a complex structure of compacted keratinized cell remnants having a thickness of about 10-30 microns, forms a waterproof membrane to protect the body from invasion by various substances and the outward migration of various compounds. [0005] The natural impermeability of the stratum corneum prevents the administration of most pharmaceutical agents and other substances through the skin. Numerous methods and devices have been proposed to enhance the permeability of the skin and to increase the diffusion of various drugs through the skin for utilization by the body. Typically, the delivery of drugs through the skin is enhanced by increasing either the permeability of the skin or the force or energy used to direct the drug through the skin. [0006] Delivering various substances through the skin is also attained by forming micropores or cuts through the stratum corneum. By piercing the stratum corneum and delivering a drug to the skin in or below the stratum corneum, many drugs can be administered effectively. In a similar manner, some substances can be extracted from the body through cuts or pores formed in the stratum corneum. The devices for piercing the stratum corneum generally include a plurality of micron-sized needles or blades having a length selected to pierce the stratum corneum without passing completely through the epidermis. Examples of these devices are disclosed in U.S. Pat. No. 5,879,326 to Godshall et al.; U.S. Pat. No. 5,250,023 to Lee et al., and WO 97/48440. [0007] In some of above-noted samples micron-sized needles or blades deliver substances to the body by allowing the substance to diffuse through the pores or channels in the device. Many of these prior art devices do not provide a controlled delivery of a substance to the patient. [0008] The prior methods and devices for the intradermal administration of substances have had limited success. Accordingly, a continuing need exists in the industry for an improved device for the administration of various drugs and other substances to the body. SUMMARY OF THE INVENTION [0009] The present invention is directed to a device for the intradermal delivery of a fluid substance through the skin of a patient. In particular, the invention is directed to a device having a separable cartridge containing a fluid substance, such as a drug or vaccine, and for delivering the substance below the stratum corneum of the skin to a depth at which the substance can be absorbed and utilized by the body. [0010] The delivery device of the invention includes a housing for engaging the surface of the skin and a dispensing cartridge received within the housing for dispensing and delivering the substance to the patient. The housing is provided with a coupling member, such as a wrist strap, for holding the housing in engagement with the skin of the patient. [0011] The cartridge defines an internal reservoir containing the substance to be delivered to the patient and at least one skin penetrating member is provided for delivering the substance intradermally to the patient. A fluid channel extends between the reservoir and the skin penetrating member. In the preferred embodiment, a plurality of skin penetrating members are provided in an array to deliver the substance intradermally to the patient. In the illustrated embodiments the skin penetrating members are an array of hollow microneedles. The cartridge includes a diaphragm or seal in the fluid channel to contain the substance within the cartridge reservoir. The cartridge includes a piercing member for piercing the seal and allowing the fluid substance to flow from the reservoir through the fluid channel to the skin penetrating members for delivery to the patient. The housing includes a hinged cover member with a cam positioned to contact and actuate the piercing member when the cover member is closed. The cover member is provided with a spring member to apply pressure to the cartridge and to the fluid substance when the cover member is closed. The pressure applied to the fluid causes it to flow through the fluid channel and the needles to be delivered intradermally to the patient. An indicator window can be provided in the cover member to provide an indication of when the cartridge is empty and the dispensing is complete. [0012] Accordingly, a primary object of the invention is to provide an intradermal delivery device having a separable and disposable cartridge containing a substance and at least one skin penetrating member for delivering the substance to the patient. [0013] A further object of the invention is to provide a device for penetrating the skin and delivering a unit dose of a substance through the skin substantially without pain to the patient. [0014] Another object of the invention is to provide a device having a plurality of microtubes, needles, microneedles, blades or lancets for piercing the stratum corneum of the skin to a depth sufficient for delivering a substance through the skin of a patient. [0015] A further object of the invention is to provide a delivery device having at least one skin penetrating member and including a cartridge having a collapsible chamber for containing a fluid substance to be delivered to a patient via the skin penetrating member. [0016] Another object of the invention is to provide a cartridge for use with an intradermal delivery device wherein the cartridge is collapsible to permit application of a dispensing pressure to the fluid substance in the cartridge for delivering the substance intradermally to the patient. [0017] Another object of the invention is to provide a device for delivering a substance to a patient wherein the device has a dispensing member in the form of a spring cooperating with a cartridge and an internal supply channel connecting a reservoir in the cartridge to at least one skin penetrating member for delivering the substance to the patient. [0018] A further object of the invention is to provide a delivery device having a cartridge with at least one flexible or elastic wall that can be deflected inwardly to dispense a substance from a reservoir through a skin penetrating member for delivery to the patient. [0019] Another object of the invention is to provide an intradermal delivery device including a cartridge having an internal chamber with a fluid outlet, a diaphragm, and a piercing member for piercing the diaphragm for delivering a substance to a patient. [0020] These and other objects of the invention are substantially attained by providing an intradermal delivery device comprising a housing having an internal cavity dimensioned to receive a cartridge. The cartridge includes at least one skin penetrating member, and a channel providing fluid communication between a reservoir in the cartridge and the skin penetrating member. Continue reading... Full patent description for Intradermal delivery device Brief Patent Description - Full Patent Description - Patent Application Claims Click on the above for other options relating to this Intradermal delivery device patent application. ###  How KEYWORD MONITOR works... a FREE service from FreshPatents1. Sign up (takes 30 seconds). 2. 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