摘要:
A medication delivery device, particularly an intradermal delivery device, having a needle cannula, with a sharpened distal end having a forward tip, and a limiter disposed about the needle cannula. The limiter has a distal end defining a skin engaging surface which is disposed transversely to, and at least partially about, the needle cannula. The skin engaging surface is generally non-flat with generally coplanar portions, and a recess being defined in the skin engaging surface which defines a void in or adjacent to the coplanar portions into which portions of a patient's skin can be deformed into when the skin engaging surface is pressed against the patient's skin. The forward tip of the needle cannula is spaced apart from a plane defined by the coplanar portions a distance ranging from about 0.5 mm to 3.0 mm such that the skin engaging surface limits penetration of the forward tip of the needle cannula to the dermis layer of the patient's skin.
摘要:
A medical needle device which is reusable and cooperates with a disposable needle assembly. The medical needle device includes a holder, a needle assembly, and an ejector rod cooperating with the holder. The needle assembly includes a needle hub and needle. The holder has a proximal end and a distal end and defines an opening extending therethrough. The distal end has a hub socket for receiving the hub of the needle, with the needle hub received in the socket. The ejector extends into the opening from the proximal end of the holder. The ejector rod is slidably received in the holder and has a distal end configured to engage the needle hub, and a proximal end extending outward from the holder. The ejector rod is used to eject the needle assembly from the holder.
摘要:
A method of making an intradermal injection using a drug delivery device containing the substance to be injected. A device for practicing the method includes a needle cannula having a forward tip and a limiter portion having a skin engaging surface surrounding the needle cannula. The needle cannula is in fluid communication with the substance and the tip of the needle cannula extends beyond the skin engaging surface a distance equal to approximately 0.5 mm to 3.0 mm. The needle cannula includes a fixed angle of orientation relative to the plane of the skin engaging surface. The skin engaging surface limits penetration of the needle tip into the skin so that the substance can be expelled through the needle tip into the dermis layer. Preferably, the fixed angle of orientation of the needle cannula is generally perpendicular relative to the skin surface, and the skin engaging surface is generally flat.
摘要:
Methods and apparatus for collecting and processing tissue to produce an endothelial cell product having a vessel for rinsing, draining, digesting and isolating tissue. The vessel has a rinsing and digesting chamber for containing tissue during processing. An inlet in the rinsing and digesting chamber allows entry of rinsing solution and tissue from a liposuction device. A waste chamber in fluid communication with the rinsing and digesting chamber preferably connects with a vacuum source. An isolation chamber is separated from the rinsing and digesting chamber by a screen. An ampule in fluid communication with the isolation chamber includes a pair of ports controlled by valve devices to be selectively in fluid communication with the isolation chamber. After processing, the ampule isolates a pellet of endothelial cells and the valve devices permit the pellet to be in fluid communication with the ports. The method includes providing the vessel, introducing tissue to be processed, orienting the vessel to screen the tissue, introducing an enzyme and agitating to digest the tissue, centrifuging the vessel to transfer the cells from the digested tissue, and isolating the cells for retrieval.
摘要:
The invention is an endothelial cell procurement and deposition kit for collecting fat from a patient, processing said fat to produce an endothelial cell deposition product, and depositing said product on the surface of a graft, all under sterile conditions established and maintained within the components of said kit comprised of: fat collection means for collecting subcutaneous fat from a patient; digestion means connectable to said fat collection means to maintain sterility during reception of said fat and for retaining said fat under sterile conditions during rinsing and digestion to produce a digested product; endothelial cell isolation means connectable to said digestion means for maintaining sterile conditions during reception of said digested product and for separating and isolating microvessel endothelial cells from said digested product to produce an endothelial cell product; cell deposition means connectable to said isolation means for maintaining sterile conditions during reception of said endothelial cell product and for depositing said cells on the surface of a graft to be implanted in a patient and facilitating implantation of said endothelial graft into a patient.
摘要:
The invention is an endothelial cell procurement and deposition kit for collecting fat from a patient, processing said fat to produce an endothelial cell deposition product, and depositing said product on the surface of a graft, all under sterile conditions established and maintained within the components of said kit comprised of: fat collection means for collecting subcutaneous fat from a patient; digestion means connectable to said fat collection means to maintain sterility during reception of said fat and for retaining said fat under sterile conditions during rinsing and digestion to produce a digested product; endothelial cell isolation means connectable to said digestion means for maintaining sterile conditions during reception of said digested product and for separating and isolating microvessel endothelial cells from said digested product to produce an endothelial cell product; cell deposition means connectable to said isolation means for maintaining sterile conditions during reception of said endothelial cell product and for depositing said cells on the surface of a graft to be implanted in a patient and facilitating implantation of said endothelial graft into a patient.