Search Images Maps Play YouTube News Gmail Drive More »
Sign in
Screen reader users: click this link for accessible mode. Accessible mode has the same essential features but works better with your reader.

Patents

  1. Advanced Patent Search
Publication numberUS2590895 A
Publication typeGrant
Publication dateApr 1, 1952
Filing dateNov 21, 1949
Priority dateNov 21, 1949
Publication numberUS 2590895 A, US 2590895A, US-A-2590895, US2590895 A, US2590895A
InventorsScarpellino Louis A
Original AssigneeScarpellino Louis A
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Myelographic needle
US 2590895 A
Images(1)
Previous page
Next page
Description  (OCR text may contain errors)

A ril 1, 1952 A. SCARPELLINO MYELOGRAPHIC NEEDLE I n renter Louis A. Scalpel/1'00 Filed Nov. 21, 1949 m zrlnllllil.

Patented Apr. 1, 1952 UNITED STATES PATENT OFFICE MY ELOGRAPHIC NEEDLE Louis A. Scarpellino, Kansas City, Mo. Application November 21, 1949, Serial No. 128,590

3 Claims.

This invention comprises novel and useful improvements in a myelographic needle and more specifically pertains to an improved construction of needle for puncturing the spinal column and injecting heavy contrast media asfor example of radium opaque nature for study of the spinal canal, and the subsequent withdrawal of the contrast media therefrom.

The primary object of this invention is to provide an improved spinal puncture needle for more effectively inserting and withdrawing contrast media into and from the spinal canal.

A very important object of the invention is to provide in a needle of the character set forth in the preceding paragraphs, improved means for discharging and withdrawing a fluid medium into and from the spinal canal for examination and study of the same, which will more satisfactorily insure that all of the inserted or injected material will be effectively withdrawn.

The objects of the invention are attained chiefly by providing a puncture needle having a beveled open lower end, together with an additional opening, or port in the wall of the needle on the side opposite the beveled open end, to provide an additional means to insure easy insertion and substantially complete withdrawal of the injected fluid medium from the spinal canal.

A still further feature of the invention resides in the provision of a spinal injection needle as set forth in the preceding paragraph, wherein the supplemental opening in the wall of the needle has its upper edge lying substantially in the same lateral plane extending transversely of the needle and perpendicular to the longitudinal axis thereof as that containing the upper edge of the beveled open end of the needle.

These, together with various ancillary features and objects of the invention which will later become apparent as the following description proceeds, are attained by the present invention, a preferred embodiment of which is illustrated by way of example only in the accompanying drawings, wherein: I

Figure l is a perspective view of a myelographic needle in accordance with the principles of this invention;

Figure 2 is a vertical central longitudinal sectional view through the needle shown in Figure l, a part of the needle shank being broken away;

Figure 3 is a fragmentary vertical central longitudinal sectional view similar to Figure 2 but showing the stylet partially withdrawn; and

Figure 4 is a vertical transverse sectional view taken substantially upon the plane of the section line 4-4 of Figure 3.

Referring now more specifically to the accompanying drawings, wherein like numerals designate similar parts throughout the various views, it will be seen that the principles of the invention may be conveniently embodied in a spinal puncture needle consisting of an elongated tubular or sleeve-like shank H] which in accordance with conventional practice is of uniform diameter throughout its length and of circular crosssection, this shank at one end being integrally or rigidly attached to a body portion 12 of a conventional design. At its other end, the shank H! is formed with a point which is provided by sever-- ing the shaft by a plane which is inclined at an acute angle to the longitudinal axis of the shaft, thus providing an elliptical beveled opening it which is inclined to the axis of the shaft, and which thus has a lower sharp point IS, the lower edge of the shank sloping upwardly from this point to an upper edge I8.

Customary needles incorporate the foregoing construction together with a stylet having a rodlike plunger member 20* which is slid'able within the tubular shaft l0 and a continuation of the 5 bore of the same which is formed in the body portion 12, the lower end of this plunger member likewise being beveled as at 22 and lying in a plane which is parallel to that forming the beveled lower portion M of the shaft H1.

The stylet, by its presence in the needle serves to impart rigidity to the latter to facilitate its insertion into the spinal canal. Upon removal of the stylet from the needle, the customary heavy contrast media or fluid, which may be of a radium opaque nature or the like, may be readily introduced into the spinal canal for radiographic study and may be subsequently withdrawn.

However, it has been found that in operating the conventional needle, it has been heretofore difiicult if not impossible to substantially completely withdraw the injected contrast media. It frequently happens however, that the opening in the needle becomes clogged by the impingement therein of contiguous structures and tissues in the spinal column, thus seriously interfering with the effective withdrawal and/or recovery of the injected heavy media.

In order to more effectively perform the intended function of withdrawing the contrast media when the necessity for the injection of the same has been terminated, the present invention comprises the addition of an auxiliary or supplementary orifice or opening 26 which is disposed in that side of the shaft H] which is opposite the beveled opening 14.

The positioning of this auxiliary opening is end M of the needle, the needle will open into the supernatant spinal fluid which by virtue of its lighter specific gravity will lie above the heavy contrast media, so that the spinal fluid will be withdrawn with or prior to withdrawal of the contrast media. This is particularly undesirable for a number of reasons, and therefore it is essential that the upper end of the opening 28 shall lie not higher than and preferably will lie in the same horizontal transverse plane as the upper edge l8 of the beveled end l4, this transverse plane being perpendicular to the longitudinal axis of the shaft 10.

The doubled-holed needle has the advantage that when once properly inserted into the spinal canal, the auxiliary hole or opening provides a means which will insure that if thefirst aperture becomes clogged as aforesaid, the auxiliary opening'will satisfactorily function to permit the-recovery of the injected heavy'media, without drawing off the less dense spinal fluid which will be disposed at a level above the injected media in the dural sac.

From the foregoing, the construction and operation of the invention will be readily understood together with the advantages arising therefrom, and further explanation is believed to be unnecessary. However, since numerous modifications and changes will readily occur to those skilled in the artafter consideration of the foregoing specification and accompanying drawings, it is not desired to limit theinvention to the exact construction shown and described, but all suitable modifications and equivalents may be resorted to, falling within the scope of the appended claims.

Having described the invention, what is claimed as new is:

1. A spinal puncture needle comprising a hollow shaft having an open end terminating in a beveled point whose lower edge lies in a plane inclined at an acute angle to the longitudinal aXis of the shaft, said shaft having an opening through its wall into the interior of the shaft in the region of the beveled point, and. means for causing a flow of fluid through said beveled point, opening and interior of the shaft, the upper portion of the opening and of the beveled point lying in the same transverse plane through the shaft.

2. A spinal puncture needle comprising a hollow shaft having an open end terminating in a beveled point whose lower edge lies in a plane inclined at an acute angle to the longitudinal axis of the shaft, said shaft having an opening through its wall into the interior of the shaft in the region of the beveled point, and means for causing a flow of fluid through said beveled point, opening and interior of the shaft, the upper portion of the opening and of the beveled point lying in the same transverse plane through the shaft which is perpendicular to the longitudinal axis of the shaft.

3. The combination of claim 1 wherein said last means comprises a stylet slidable in said shaft, and extending from the end thereof opposite the beveled point, a knob on the extending end of said stylet.

LOUIS A. SCARPELLINO.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US938951 *Apr 30, 1909Nov 2, 1909Frederic D BellHypodermic syringe.
US964950 *Mar 16, 1908Jul 19, 1910Charles J TagliabueHypodermic syringe.
US1527291 *Jul 9, 1923Feb 24, 1925Guillermo ZorraquinSafety-pressure-indicating needle
US2159217 *Nov 5, 1937May 23, 1939Cook Lab IncControllable transfer element for multiple ampules
US2389355 *Jan 27, 1943Nov 20, 1945Althea D KesslerSurgical needle
DE446818C *Jul 19, 1923Jul 11, 1927Hermann Weyl DrNadelfoermige Kanuele
FR453877A * Title not available
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2748769 *Feb 24, 1953Jun 5, 1956Jennie HuberHypodermic needle
US2828744 *Feb 13, 1956Apr 1, 1958Mansbach Alvin AFlexible needle for use in intravenous therapy
US2836180 *Aug 31, 1954May 27, 1958Charles C ChappleFluid conduit and flow control apparatus
US3101084 *May 8, 1962Aug 20, 1963Hamilton Clark HSyringe
US3920001 *Jun 10, 1974Nov 18, 1975Donald W EdwardsAspirator device
US3955558 *Nov 4, 1974May 11, 1976Medcom, Inc.Instrument for spinal taps
US3961622 *Sep 9, 1975Jun 8, 1976Edwards Donald WAspirator method
US4134402 *Jul 5, 1977Jan 16, 1979Mahurkar Sakharam DDouble lumen hemodialysis catheter
US4543087 *Nov 14, 1983Sep 24, 1985Quinton Instrument CompanyDouble lumen catheter tip
US4568329 *Oct 1, 1984Feb 4, 1986Mahurkar Sakharam DDouble lumen catheter
US4583968 *Aug 15, 1984Apr 22, 1986Mahurkar Sakharam DSmooth bore double lumen catheter
US4623327 *Feb 12, 1985Nov 18, 1986Mahurkar Sakharam DMethod and apparatus for using dual-lumen catheters for extracorporeal treatment
US4692141 *Jan 29, 1986Sep 8, 1987Mahurkar Sakharam DDouble lumen catheter
US4770652 *Jul 18, 1986Sep 13, 1988Mahurkar Sakharam DMethod and apparatus for using dual-lumen catheters for extracorporeal treatment
US4808155 *Sep 16, 1987Feb 28, 1989Mahurkar Sakharam DSimple double lumen catheter
US5026350 *May 26, 1989Jun 25, 1991Hakko Electric Machine Works Co., Ltd.Set of double needles for injecting liquid medicine
US5195526 *Dec 26, 1990Mar 23, 1993Michelson Gary KSpinal marker needle
US5197951 *Feb 27, 1986Mar 30, 1993Mahurkar Sakharam DSimple double lumen catheter
US5221255 *Oct 16, 1991Jun 22, 1993Mahurkar Sakharam DReinforced multiple lumen catheter
US5320110 *Mar 30, 1993Jun 14, 1994Wang Ko PPleural biopsy syringe-needles
US5364387 *Aug 2, 1993Nov 15, 1994Becton, Dickinson And CompanyDrug access assembly for vials and ampules
US5374245 *Apr 28, 1993Dec 20, 1994Mahurkar; Sakharam D.Reinforced multiple-lumen catheter and apparatus and method for making the same
US5690642 *Jan 18, 1996Nov 25, 1997Cook IncorporatedRapid exchange stent delivery balloon catheter
US5716348 *Oct 19, 1995Feb 10, 1998Meridian Medical Technologies, Inc.Anti-coring needle
US5797869 *Jun 7, 1995Aug 25, 1998Vas-Cath IncorporatedMultiple lumen catheter
US6206849Aug 25, 1998Mar 27, 2001Vas-Cath IncorporatedMultiple lumen catheter
US7229429Mar 27, 2001Jun 12, 2007Vas-Cath Inc.Multiple lumen catheter
US7569035Nov 2, 2001Aug 4, 2009Meridian Medical Technologies, Inc.Automatic injector with anti-coring needle
US8540686Mar 2, 2005Sep 24, 2013Covidien AgBlunt tip vial access cannula
WO1997014461A1 *Oct 10, 1996Apr 24, 1997Survival TechnologyAnti-coring needle
Classifications
U.S. Classification600/431, 604/272
International ClassificationA61B17/34
Cooperative ClassificationA61B17/3401
European ClassificationA61B17/34B