Retractable-needle cannula insertion set with refinements to bet

Details Retractable-needle cannula insertion set with refinements to bet Retractable-needle cannula insertion set with refinements to bet

1996-07-29

1997-12-30

Buiz, Michael Powell

Surgery

Means for introducing or removing material from body for...

Treating material introduced into or removed from body...

604198, A61M 550

Patent

active

057023670

ABSTRACT:
Leakage of blood from the insertion set, during and after safety-needle retraction, is suppressed by components that receive and retain flash blood for viewing--notwithstanding forces developed within the device in retraction. One preferred such system includes a flash chamber that moves with the retracting needle, within a hollow handle, carrying a relatively high flow-impedance element which allows air exhaust from the chamber into the handle to admit flash blood--but isolates blood in the chamber from retraction-generated increase in air pressure in the handle. Energy-absorbing components control or compensate for retraction speed, to provide quiet smooth retraction--while yet enabling use of ample retraction force to make retraction reliable. Among several energy absorbing systems disclosed is a preferred one that includes a viscous material introduced within the hollow handle to damp the retracting motion; and an injection port to facilitate introduction of the viscous material. Needle reuse, and concomitant risk of spreading disease, are avoided through components that deter needle redeployment--by deterring access to or forward motion of the needle, or trigger reengagement.

REFERENCES:
patent: Re34416 (1993-10-01), Lemieux
patent: 2737950 (1956-03-01), Berthiot
patent: 3589361 (1971-06-01), Loper et al.
patent: 3938513 (1976-02-01), Hargest
patent: 4391274 (1983-07-01), Kagan
patent: 4512766 (1985-04-01), Vailancourt
patent: 4676783 (1987-06-01), Jagger et al.
patent: 4682980 (1987-07-01), Suzuki
patent: 4747831 (1988-05-01), Kulli
patent: 4762516 (1988-08-01), Luther et al.
patent: 4772265 (1988-09-01), Walter
patent: 4781692 (1988-11-01), Jagger et al.
patent: 4828548 (1989-05-01), Walter
patent: 4832696 (1989-05-01), Luther et al.
patent: 4838869 (1989-06-01), Allard et al.
patent: 4900307 (1990-02-01), Kulli
patent: 4904242 (1990-02-01), Kulli
patent: 4909793 (1990-03-01), Vining et al.
patent: 4917671 (1990-04-01), Chang
patent: 4936830 (1990-06-01), Verlier
patent: 4950252 (1990-08-01), Luther et al.
patent: 4978343 (1990-12-01), Dysarz et al.
patent: 4978344 (1990-12-01), Dombrowski et al.
patent: 5013304 (1991-05-01), Russell et al.
patent: 5125414 (1992-06-01), Dysarz
patent: 5129884 (1992-07-01), Dysarz
patent: 5273540 (1993-12-01), Luther et al.
patent: 5330443 (1994-07-01), Powles et al.
patent: 5346480 (1994-09-01), Hess et al.
patent: 5395342 (1995-03-01), Yoon
patent: 5501671 (1996-03-01), Rosen et al.

Affiliated with

Also associated with

Rating

Retractable-needle cannula insertion set with refinements to bet does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Retractable-needle cannula insertion set with refinements to bet, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Retractable-needle cannula insertion set with refinements to bet will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-197568