Surgery – Means for introducing or removing material from body for... – Treating material introduced into or removed from body...
Patent
1999-01-11
1999-10-26
Yasko, John D.
Surgery
Means for introducing or removing material from body for...
Treating material introduced into or removed from body...
604171, A61M 5178
Patent
active
059719591
ABSTRACT:
An automatic safety infusion catheter needle including: a trifurcate connector having a first and a second connecting sections coaxially aligned with each other; an infusion soft needle inserted on the first connecting section of the trifurcate connector; and a steel needle having a needle body slidably fitted in a sleeve and axially passed in the soft needle. The sleeve is connected with the second connecting section of the trifurcate connector. The holder body of the steel needle has a projecting post formed with an air guiding hole for exhausting the air outside and making the liquid medicine smoothly flow into the soft needle. An infusion catheter is serially connected with a third connecting section of the trifurcate connector for infusion of liquid medicine through the soft needle into the body of a patient. The steel needle is formed with a latching groove and at least one guiding rib is disposed on a lower edge of the latching groove. When pulling back the steel needle out of the sleeve, the guiding rib serves to outward expand the latching flange of bottom end of the sleeve, permitting the latching flange to smoothly latch with the latching groove of the steel needle so as to hide the needle body of the steel needle in the sleeve.
REFERENCES:
patent: 5830190 (1998-11-01), Howell
patent: 5833662 (1998-11-01), Stevens
patent: 5846227 (1998-12-01), Osterlind
patent: 5893844 (1999-04-01), Misawa
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