Patent ID: 7645264
Filing Date: 2010-01-12
Classification: A61M

Abstract:
1. An injection mechanism for injecting fluid into a targeted tissue layer comprising: a primary reservoir for storing fluid prior to injection having a first axis; a secondary reservoir for holding the amount of fluid to be injected having a second axis, wherein the secondary reservoir is located co-axially and in series with the primary reservoir and has a smaller cross-sectional area than the cross-sectional area of the primary reservoir; a needle connecting portion comprising a sliding seal, a needle assembly, and a needle stop, wherein the sliding seal comprises a needle septum forming one side of the secondary reservoir and through which the fluid to be injected passes from the collapsing secondary reservoir during the injection; and a patient needle for intersecting the needle septum of the sliding seal, and for penetrating the skin of the patient to inject the fluid in the targeted tissue layer.