Injection member

• US 6,231,540 B1
• Filed: 07/09/1998
• Issued: 05/15/2001
• Est. Priority Date: 07/14/1997
• Status: Expired due to Fees

• Current Assignee: Novo Nordisk A/S
• Original Assignee: Novo Nordisk A/S
• Inventors: Smedegaard, Jørgen K.
• Primary Examiner(s): Sykes, Angela D.
• Assistant Examiner(s): Bianco, Patricia
• Application Number:
  US09/112,494
• Time in Patent Office: 1,041 Days
• Field of Search: 604/68, 604/69, 604/70, 604/71, 604/117, 604/118, 604/310, 604/890.1, 604/46-47, 604/272, 604/239, 604/3
• US Class Current: 604/68
• CPC Class Codes: A61M 5/30 Syringes for injection by jet action, without needle, e.g. for use with replaceable ampoules or carpules
• 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

Abstract

An injection member for a jet spray injection device through which device a dose of medicine is administered for subcutaneous or intramuscular injection has a jet nozzle designed as a skin-penetrating member having a length of 0.05-0.3 mm enabling it just to penetrate the stratum corneum.

Claims

1. An injection member for use with a jet spray injection device for administering a subcutaneous or intramuscular dose of medicine, wherein said injection member comprises a surface which may be pressed against the skin of a patient, a jet spray nozzle, and a skin-penetrating member communicating with said nozzle for allowing a jet spray to pass through said skin-penetrating member into a patient, wherein said skin-penetrating member projects from said surface by a distance in the range of 0.05 mm and 0.3 mm, whereby when said skin-penetrating member is inserted into the skin of a patient, it passes at least substantially through the stratum corneum such that a jet spray exits said skin-penetrating member within, or at least near, the dermal layer of the skin.

2. An injection member according to claim 1, wherein said skin-penetrating member has a length in the range of 0.1 mm to 0.2 mm.

3. An injection member according to claim 2, wherein said injection member includes an engagement member for releasably mounting the injection member on a jet injection syringe so that said injection member is a changeable unit.

4. An injection member according to claim 3, wherein said injection member includes a plurality of jet spray nozzles and a skin-penetrating member associated with each said nozzle.

5. An injection member according to claim 2, wherein said injection member includes a plurality of jet spray nozzles and a skin-penetrating member associated with each said nozzle.

6. An injection member according to claim 1, wherein said injection member includes an engagement member for releasably mounting the injection member on a jet injection syringe so that said injection member is a changeable unit.

7. An injection member according to claim 6, wherein said injection member includes a plurality of jet spray nozzles and a skin-penetrating member associated with each said nozzle.

8. An injection member according to claim 1, wherein said injection member includes a plurality of jet spray nozzles and a skin-penetrating member associated with each said nozzle.