| 摘要 |
THIS INVENTION RELATES TO A NOVEL CARTRIDGE - NEEDLE UNIT HAVING A RETRACTABLE NEEDLE FOR USE WITH DISPOSABLE OR REUSABLE HOLDERS TO FORM SAFETY SYRINGES. THE CARTRIDGE - NEEDLE UNIT COMPRISES A CARTRIDGE ( 10 ) COMPRISING A HOLLOW BODY ( 14 ), A SEPTUM ( 18 ) AT THE DISTAL END OF THE BODY ( 14 ), MENAS ( 16 ) FOR RETAINING THE SEPTUM ( 18 ), AND A PLUNGER ( 20 ), AXIALLY AND RECIPROCALLY SLIDABLE THROUGH THE INTEROIR OF THE BODY ( 14 ); A NEEDLE ( 22 ) CAPABLE OF BEING RETRACTED WITHIN THE CARTRIDGE ( 10 ); A HUB ( 24 ) COMPRISING A SLEEVE ( 26 ) ADAPTED TO BE SNAPPED ON THE DISTAL END OF THE CARTRIDGE ( 10 ); MEANS ( 28, 30, 32 ) FOR RETAINING THE NEEDLE ( 22 ) WITHIN THE HUB ( 24 ) DURING AN INJECTION; AND MEANS ( 28, 30 ) FOR RELEASING THE NEEDLE ( 22 ) FROM THE HUB ( 24 ) AFTER THE INJECTION COMPRISING AN ELEMENT ( 30 ) ATTACHED TO THE NEEDLE ( 22 ), AND HAVING A DIAMETER GREATER THAN SAID NEEDLE, CAPABLE OF PASSING THROUGH THE SEPTUM ( 18 ).THE RETRACTABLE CARTRIDGE - NEEDLE UNIT EXHIBITS IMROVED RELIABILITY, REDUCES THE TENDENCY FOR BODY FLUIDS AND / OR MEDICATION TO REMAIN IN AN UNPROTECTED AREA UPON RETRACTION OF THE NEEDLE AND VIRTUALLY ELIMINATES THE POSSIBILITY THAT THE NEEDLE CAN BE RELEASED INTO THE PATIENT.
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