Surgery – Means for introducing or removing material from body for... – Treating material introduced into or removed from body...
Patent
1994-05-27
1995-11-21
Hirsch, Paul J.
Surgery
Means for introducing or removing material from body for...
Treating material introduced into or removed from body...
128DIG26, 604177, A61M 3900, A61M 2502
Patent
active
054682282
DESCRIPTION:
BRIEF SUMMARY
This invention relates to devices for intravenous infusion of fluids such as by drip-feed, anaesthesia and the like or sampling of blood, and more particularly relates to an intravenous cannula connector and fixation device.
A problem with administering intravenous medicinal fluids such as drip-feed and anaesthetic through tubing from a syringe or reservoir is that of cutaneous fixation of an intravenous cannula and this problem is aggravated by uncooperative patients or children, who can be very restless.
A disadvantage of standard intravenous cannulae is that they are not easy to secure to the skin because of the small surface: contact area of the device available for fixing by the use of adhesive tape and dressing and it is often necessary to use several pieces of adhesive tape. Furthermore, intravenous cannulae, when left in situ for long periods can cause pressure points on the skin.
A disadvantage of winged cannulae is that, whilst they have wings on the cannula itself to improve the surface contact and fixation with the skin, they are bulky ungainly and can be awkward to insert. They usually require a syringe to be attached in a rigid, inflexible manner, often perpendicular to the skin. This has the disadvantages that firstly, a syringe attached in a rigid, perpendicular manner is at risk of catching on drapes, bedding, etc. when a limb is moved and this can result in the entire device becoming dislodged; and secondly, a syringe attached in this manner can be difficult to detach from the cannula with one hand without dislodging the cannula.
A disadvantage of winged needle devices is that the portion remaining in the patient is a needle, not a cannula, and thus prone to migrate out of the vein into which it has been inserted.
A disadvantage of spigot-fit connections is that there is a risk of the cannula becoming disconnected from its spigotted connection. Screw-on, "luer-lock" type connections can be awkward to apply to a cannula in an uncooperative patient.
It is the object of this invention to provide an intravenous cannula connector which at least partly alleviates one or more of the foregoing problems and/or disadvantages.
According to the invention, there is provided an intravenous cannula connector for fixing an intravenous cannula in position on the skin after intravenous insertion of the cannula to leave an end portion of the cannula extending externally, the cannula connector having a body portion adapted at one end to couple to the end portion of the cannula to then provide for fluid flow to or from the cannula via the cannula connector, the cannula connector having, extending from the body portion at opposite sides thereof, respective wings which extend forwardly of the body portion beyond said end of the body portion to permit the cannula connector, when coupled to the cannula, to be affixed to the skin by a single piece of adhesive tape which extends over the wings and/or cannula to hold them substantially flat against the skin. Structure may be provided on the cannula connector wings, to improve the quality of attachment of a spigot connection to the cannula, to reduce the likelihood of disconnection.
The body may have one end thereto formed into a spigot, luer lock or the like for placement thereon of the cannula. The other end may be connected either to an intravenous giving set, or to any one of a number of standard intravenous or syringe attachments, such as a three-way tap, a non-return injection valve, or a plain luer attachment or the like, with or without a length of flexible tubing between the connector and the attachment. The wings may be flexible. Preferably the wings arc so set forward relative to the body as to in use of the connector be disposed in the same plane on either side of the body of the connector to leave a space therebetween for accommodating the cannula. The body and wing, when attached to the cannula, may together provide a large surface area in use in contact with the skin, which will not only facilitate fixation with adhesive tape, but will also assist in r
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