Surgery – Means for introducing or removing material from body for... – Treating material introduced into or removed from body...
Patent
1996-10-18
1998-11-10
Coggins, Wynn Wood
Surgery
Means for introducing or removing material from body for...
Treating material introduced into or removed from body...
604192, 604171, 128919, A61M 500
Patent
active
058336702
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
This invention relates to a protective device for protecting against needle-stick injury by a catheter assembly.
The invention has particular utility with catheter assemblies of the type used by blood banks and the invention will hereinafter be described with reference to such use. However, a catheter assembly, as the term is used herein, may also be used to infuse fluid.
Catheter assemblies of the type referred to above are generally composed of a needle, a needle mount, and a flexible conduit which leads to the blood collection bag. In many instances the catheter assembly is a so-called "wing catheter" and the needle mount includes a pair of laterally extending protrusions or wings.
In use, the medical practitioner manually grasps the needle mount during withdrawal of the needle from the donor and uses the other hand to apply a swab and pressure to the puncture wound. It is desirable to shield the needle as soon as possible with a view to minimising the possibility of needle-stick injury.
BACKGROUND ART
There have been many solutions proposed to the problems presented by needle-stick injury.
The most relevant prior art known to the applicant is WO 92/04063 in the name of Gianakos which discloses a construction including a ratchet and pawl arrangement, the ratchet 20 being disposed on a non-conventional needle mount or body 12.
DISCLOSURE OF THE INVENTION
This invention in one aspect resides broadly in a protective device for a conventional catheter assembly of the type used by blood banks and including a needle mount, a forwardly extending needle, and a rearwardly extending conduit, the protective device comprising: non-shielding position, and adapted to be forwardly displaced relative to the catheter assembly from the first non-shielding position to a second non-shielding position wherein the sleeve member is restrained relative to the catheter assembly, and adapted to be forwardly displaced relative to the catheter assembly from the second non-shielding position to a shielding position wherein the needle is shielded.
Preferably, the protective device comprises fixing means for fixing the sleeve member in the shielding position.
Preferably, the sleeve member is adapted to be single-handedly displaced from the second non-shielding position to the shielding position.
Preferably, the protective device comprises restraining means for restraining the sleeve member in the second non-shielding position against rearward displacement relative to the catheter assembly.
The restraining means may be disposed on the catheter assembly and adapted to selectively engage the sleeve member. However, it is preferred that the restraining means be disposed on the sleeve member and adapted to engage the catheter assembly.
Preferably, the fixing means and restraining means are cooperable with the needle mount of the catheter assembly to respectively fix and restrain the sleeve member. Alternatively, the fixing means and/or restraining means may cooperate with the conduit or needle to respectively fix and restrain the sleeve member.
The restraining means may include resilient barbs adapted to engage the needle mount, frictional engagement means, abutment means adapted to abut the needle mount, or releasable locking means selectively engageable with the needle mount.
The sleeve member may include a plurality of sub-members. Preferably, a pair of sub-members are hinged together about a longitudinally extending axis, the sub-members adapted to be closed and locked together about the conduit so that the sleeve member is slidably disposed on the conduit.
Preferably, the protective device comprises actuation means adapted to be manually engaged to longitudinally displace the sleeve member towards the shielding position.
In another aspect the invention resides broadly in a protective device and catheter assembly comprising: mount, a forwardly extending needle, and a rearwardly extending conduit; and
a protective device comprising a sleeve member adapted to be slidably supported on the conduit in a first non-shi
REFERENCES:
patent: 4417887 (1983-11-01), Koshi
patent: 4917243 (1990-04-01), Abrams et al.
patent: 5112313 (1992-05-01), Sallee
patent: 5120320 (1992-06-01), Fayngold
patent: 5376075 (1994-12-01), Haughton et al.
Dillon Jagmohanbir Singh
Mobbs William Leonard
Bednarek Michael D.
Blyveis Deborah
Coggins Wynn Wood
Noble House Group
Stockton LLP Kilpatrick
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