Surgery – Means for introducing or removing material from body for... – Treating material introduced into or removed from body...
Patent
1990-12-04
1992-10-06
Rosenbaum, C. Fred
Surgery
Means for introducing or removing material from body for...
Treating material introduced into or removed from body...
604198, 604263, A61M 532
Patent
active
051527510
ABSTRACT:
A manually operated needle-shielding safety device attachable to a standard hypodermic needle and syringe medical apparatus (42). By forward directed thumb or finger stroke upon a proximally projecting pushrod (128) slidably operable within a pushrod channel (82) positioned parallel to and radially removed from the primary syringe barrel plunger (44), the elongated shield (148) is pushed from a housing (66) mounted at the base of the hypodermic needle and syringe apparatus (42), rotated longitudinally from an inverted position, and advanced to the distal end of the syringe apparatus (42) against resistance from a rubber band (64) or integral expansion spring (244). The distal portion of the shield (148) surmounts the tip of the needle (54) and the needle (54) enters the shield (148) laterally through an opening in the shield face (154). The operator then releases thumb or finger pressure upon the pushrod (128) and the enclosed forward end of the shield (148) is pulled rearward by the rubber band (64) or integral expansion spring (244) to surround and safely contain the needle (54) tip.
The device can be deployed quickly, surely, and conveniently at the user's option immediately after the injection process, with one hand, without the need to shift finger grip upon the hypodermic apparatus (42), and without interfering with the user's concentration upon other important medical tasks. The invention can be used with most currently manufactured needle and syringe devices and does not require modification of existing needle designs, needle hub designs including luer connection designs and low-dose minimum "dead space" designs, needle cementing processes and equipment, fluid chamber designs, and fluid chamber piston engines.
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Rosenbaum C. Fred
Smith Chalin
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