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Publication numberUS3774606 A
Publication typeGrant
Publication date27 Nov 1973
Filing date7 Mar 1972
Priority date7 Mar 1972
Publication numberUS 3774606 A, US 3774606A, US-A-3774606, US3774606 A, US3774606A
InventorsNorton W
Original AssigneeBard Inc C R
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Adjustable needle hub
US 3774606 A
An intravenous needle and catheter (or cannula) combination wherein the needle passes through the catheter, when assembled for venipuncture, the needle hub being formed distally in a plurality of steps adapted to support Luer lugs on the catheter hub in different positions, permitting determination of the distance the needle bevel tip projects beyond the catheter tip.
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Description  (OCR text may contain errors)

United States Patent [1 1 1 Norton [451 Nov. 27, 1973 ADJUSTABLE NEEDLE HUB William J. Norton, 170 Maple Ave., Berkeley Heights, NJ.

Assignee: C. R. Bard, lnc., Murray Hill, NJ.

Filed: Mar. 7, 1972 Appl. No.: 232,546


US. Cl. 128/2l4.4, 128/221 A61m 05/00 Field of Search 128/214.4, 221, 347, 128/348 References Cited UNITED STATES PATENTS 3,406,687 10/1968 Moyer 128/221 3,506,007 4/1970 Henkin 128/2l4.4 X 1,248,492 12/1917 Hill 3,459,183 8/1969 Ring et al. 128/214.4

Primary ExaminerDalton L. Truluck Attorney-W. Saxton Seward and Chester E. Martine, Jr.

[57] ABSTRACT 2 Claims, 7 Drawing Figures 23 22 l5 l9 I6 20 l5 l8 l3 ADJUSTABLE NEEDLE HUB In an intravenous needle and catheter set of the type wherein the needle is within the catheter, as illustrated by Gauthier and Massa U.S. Pat. No. 3,094,122 and Braun U.S. Pat. No. 3,348,544, for example, it has been found that accurate control of the catheter length cannot practically be assured under normal manufacturing conditions, so that uniform projection of the needle bevel from the tapered distal end of the catheter is difficult to achieve. While some deviation from the optimum projection can be tolerated, a simple means to compensate for abnormalities is desirable and the present invention constitutes such a means. It also provides the user with a possibility of varying the needle tip projection as may be desired in special situations, not necessarily related to variations of catheter length. The adjustment is effected by providing the distal face of the needle hub with a plurality (shown as three) of pairs of diametrically opposite steps located at different distances axially from the needle tip. The catheter hub is normally provided with Luer locking lugs projecting from its proximal rim and the steps are located to stop the lugs, axially, in positions such that the needle tip will project varying distances from the catheter tip.

Hill U.S. Pat. No. 1,248,492 shows a pointed needle with a tubular cannula slidable thereon and means, in the form of a bayonet joint, for securing the cannula in retracted position to expose the needle point or in extended position-to cover the needle point entirely. Henkin U.S. Pat. No. 3,506,007 shows a catheter-needle combination in which the catheter hub has a keyway to receive a key on the needle hub when the needle is advanced, the catheter hub surface stopping the needle in retracted position when the key is not in register with the keyway. Neither of these patented devices is intended or adapted to serve the purposes of the present invention.

A practical embodiment of the invention is shown in the accompanying drawing wherein:

FIGS. 1, 2 and 3 represent side elevations of the needle and catheter assembly, portions of the hubs being broken away and in section, showing three different adjusted positions of the parts;

FIG. 4 represents a distal face view of the needle hub;

FIG. Srepresents an axial section on the line VV of FIG. 4

FIG. 6 represents an axial section on the line VIVI of FIG. 4

FIG. 7 represents an axial section on the line VII- VII of FIG. 4 and An intravenous set is shown as comprising the catheter (or cannula) 10, the shaft 11 of which has a tapered distal tip 12 and is cemented in, or molded integrally with an adapter hub 13. The proximal (open) end 14 of the hub is annular and is provided with diarnmetrically oppositely projecting Luer lugs 15 each extending arcuately no more than 60 and preferably somewhat less.

The needle 16 is of customary form with beveled cutting point 17 and is fixed at 18 in the slightly tapered distal end portion 19 of a hub 20. At the base of the portion 19 the hub extends radially outward and is bounded by an annular rim 21, within which the distally facing surface is partially flat, 23, indicated at 22, and partially stepped as shown at 22, 23' and 24, 24'. Each of the steps 23, 23' and 24, 24 is arcuate, extending around the margin of the flat surface 22 through an are of no more than 60, the pairs of steps 23, 23 and 24, 24' being disposed diametrically opposite each other and a stop 25 extending inward from the rim 21 at a point between an end of a step 24 and the adjacent flat surface 22.

In the manufacture of I.V. sets of the character described it is customary to mount a group of needles in a jig with their proximal ends positioned against a stop, the bevels being ground on the distal ends in a highly accurate machine operation, and the needles being then mounted in hubs 20 with their ends seated in a recess and fixed, as indicated at 18, by cementing or the like, the distance from the hub to the beveled tip 17 being uniform within established tolerances. The catheters 10, however, being of flexible plastic material and tapered by various methods, including grinding, molding and/or drawing characteristically show greater variations in length. For purposes of illustration, the catheters 10 in FIGS. 1, 2 and 3 are shown as being identical, the one in FIG. 2 having its beveled tip located at the point which is generally preferred, close to but slightly proximal of the heel of the bevel 17. This catheter, having optimal length, has its hub seated on the middle step 23, 23'. When the same catheter has its hub on the lower step 22, its tip is spaced too far from the bevel, as shown in FIG. 1, and when it is on the upper step 24, 24 its tip covers the heel of the bevel (FIG. 3) which is also undesirable.

Assuming, however, that a number of catheters are made and found to vary slightly in length, it will be evident that those slightly longer than the one shown can have their hubs seated as in FIG. 1 so that their tips will be acceptably close to the needle bevel, while those slightly shorter than the one shown can have their hubs seated on the upper step 24, 24' also in an acceptable relation to the needle. The range of tolerances in this critical dimension (catheter length) can thus be greatly enlarged with consequent reduction in the percentage In effecting venipuncture with a needle and catheter.

set of the type disclosed herein the forces acting on the device are largely axial, so thatthere is little likelihood of the catheter hub being displaced from its adjusted position by rotation with respect to the needle. The frictional engagement of the needle in the catheter thus suffices to hold the parts reliably in their desired relative orientation.

While a three-step arrangement is shown and described, it will be understood that two steps or more than three steps could be provided, if desired. The reference to lugs 15 as being Luer lugs is intended to indicate generally a type of radially projecting lug, without limitation to those which could actually constitute a Luer lock.

It will be understood that various changes may be made in the form, construction and arrangement of the several parts without departing from the spirit and scope of the invention and hence I do not intend to be limited to the details shown or described herein except as the same are included in the claims or may be required by disclosures of the prior art.

What I claim is:

1. An intravenous needle and catheter set wherein a needle element is located within a catheter element with its point projecting from the distal end of the catheter element, comprising a needle fixed in a needle hub and a catheter fixed to a catheter hub, said needle hub facing annular channel and said plurality of surfaces being disposed in said channel. 4

2. An intravenous needle and catheter set according to claim 1 wherein the catheter hub is provided with a pair of diametrically oppositely disposed lugs each having a proximally-facing surface extending through an arc no greater than each of said plurality of surfaces.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US1248492 *10 Apr 19174 Dec 1917A D HaskellParacentesis needle or trocar.
US3406687 *23 Jun 196622 Oct 1968Resiflex LabGuide and positioning means for a needle
US3459183 *20 May 19665 Aug 1969Voys Inc LeCatheter placement unit with anesthetic
US3506007 *24 Jul 196714 Apr 1970Henkin Melvyn LaneCatheter-needle
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3976070 *25 Feb 197524 Aug 1976Mark DumontNeedle reinforcing means for small gauge hypodermic needles
US4027669 *12 Apr 19767 Jun 1977American Hospital Supply CorporationDestructible Luer lock syringe and method of destructing same
US4874375 *13 Apr 198717 Oct 1989Ellison Arthur ETissue retractor
US5649939 *5 May 199422 Jul 1997Reddick; Eddie J.Laparoscopic suture introducer
US5676675 *28 Apr 199414 Oct 1997Grice; O. DrewLaparo-suture needle and method for use thereof
US5928198 *7 Aug 199727 Jul 1999Smiths Industries Public Limited CompanyMedical tube assemblies
US790980224 Apr 200322 Mar 2011Imp B.V.Device for inserting a drain and handle for such a device
EP0045849A1 *8 Jul 198117 Feb 1982Intermedicat GmbHPermanent intravenous catheter
EP0258566A2 *2 Jul 19879 Mar 1988B. Braun Melsungen AGHypodermic puncture needle
EP0258566A3 *2 Jul 198712 Oct 1988B. Braun Melsungen AgHypodermic puncture needle
EP0659447A2 *19 Dec 199428 Jun 1995Wilson-Cook Medical Inc.Gastrointestinal needle mechanism
EP0659447A3 *19 Dec 199413 Sep 1995Wilson Cook Medical IncGastrointestinal needle mechanism.
WO1985000100A1 *30 May 198417 Jan 1985Project UImproved endometrial cytologic sampling apparatus and method
U.S. Classification604/165.1
International ClassificationA61M25/06
Cooperative ClassificationA61M25/0606
European ClassificationA61M25/06C