FR2778094A1 - Syringe for blood withdrawal - Google Patents

Abstract

The syringe for withdrawing blood comprises a sleeve with a needle at its two ends. The sleeve comprises a bottom (110) with an outlet orifice. A guide and locking piece carrying the needle in the sleeve has two lugs each housed in a runner. The sleeve bottom has a truncated conical section the small base of which carries the needle outlet orifice. The other end of the sleeve carries two curved tongues (130,131) preventing the placing of the syringe on this end.

Description

The present invention relates to a blood collection device

  comprising a sleeve provided with a needle with two ends, the first end of which is intended to be punctured in the vein and the second end of which to perforate the stopper of the vacuum tube placed in the sleeve, the sleeve having a bottom with an outlet orifice and for guiding the first end and two guide and locking slides each having two locking positions, a guide and locking piece carrying the needle in the sleeve having two pins each housed in a slide,

  accessible from outside the sleeve to pass my-

  only the needle from its retracted position, set back in the sleeve, in its position of use for which

  the needle has come out of the sleeve, the slide having a par-

  longitudinal tie corresponding substantially to the movement that

  must perform the needle to pass from its retracted position

  ted in its position of use and ending at each ex-

  end by a locking extension, transverse by

  relative to the sliding direction corresponding to each

  one of the two needle positions.

  Such a sampling device is already known

  according to document FR-92 00 680.

  Although this device is satisfactory, it is desirable to perfect it to make it even easier to use and above all to reduce the risk of bites.

for the operator.

  To this end, the invention relates to a device of the type defined above, characterized in that the sleeve has

  a truncated cone-shaped bottom with a small base

  carries the needle outlet, forming a part

  tie, and the other end of the sleeve has two legs

  curved preventing the installation of the device on this end

  moth. The curved tabs of the sleeve do not, in any case, allow to place the sampling device in position

  vertical by pressing on these legs because they are

  kill a totally unstable surface for such a posi-

  tion. This avoids the risk that by inattention the operator places the sampling device upright,

  the needle turned upwards, and risking that the operator might prick on the needle thus protruding and in a position which is hardly visible.5 The shape of the bottom of the sleeve, which is in a truncated cone, presents the advantage of not interfering with the angle according to the-

  which the sampling device is stuck in the vein, while guaranteeing excellent holding of the needle over a great length and, moreover, allowing for the same length of sleeve body (cylindrical part)

  pull the needle to a shorter length than if the bottom were flat, which allows the needle to stay well inside the sleeve and thus exclude practically any risk of accidental puncture on the rear end of

the needle.

  The slides, which open at the rear end

  of the sleeve at the legs, facilitate the manufacturing

tion and mounting of the device.

  In fact, it is not then necessary to carry out

  separate the guide piece, insert it in the

  sleeve then put in place the gripping lugs.

  As elsewhere, the passages corresponding to the sil-

  gripping lugs owl, made in the curved tabs at the rear of the sleeve, this does not weaken the

room at this level.

  It is particularly interesting for facili-

  ter gripping that the pins of the guide piece are each provided with a large surface head and rounded shape.

  This large surface and the rounded shape allow-

  the operator tries to place his thumb, for example,

  his index finger on the head of the two lugs, diametrically opposed

  to advance the guide piece first and then, once the sample has been taken, to return the needle to

inside the sleeve.

  Particularly advantageously, the guide piece is in the form of a disc with an enlarged outer edge, carrying, in its center, an elongated hub receiving the needle and having on its front surface, two stabilizing lips, arranged in a substantially axial plane. perpendicular to the plane of the pins and, on the rear face, pins intended

  to be planted in the membrane of the sampling tube.

  A very simple solution, to prevent the guide piece from being accidentally extracted from the

  sleeve, consists in extending the slide by an extension slide having a width decreasing from the rear towards the front of the part to form a narrow outlet prohibiting the penetration back of the lug once it has past the narrowest point between the end of the

  smooth extension and entry into the guide and locking slide. Advantageously, the truncated cone has

concave curvature.

  This facilitates the tilting of the pre-

  lifting for the bite while reinforcing, by this geometry-

  sort, the position of the bearing receiving the needle.

  Particularly interesting, for

  put the operator to identify the orientation of the needle (its bevel), since the assembly formed by the sleeve and the guide piece are in a fixed relative orientation relative to the general axis, consists in providing the surface in truncated cone of orientation bosses, which can be recognized by touch, without it being necessary to carry, moreover, indications on the syringe to define its orientation and

especially that of the needle.

  The present invention will be described below

  in more detail using the accompanying drawings in the-

  which: - Figure 1 is a side view of a body of the sampling device according to the invention, - Figure 2 is a sectional view along II-II of Figure 1, - Figure 3 is a view of enlarged scale of part III of Figure 2, - Figure 4 is a sectional view along IV-IV of Figure 3, - Figure 5 is a front view of the body of the syringe device according to Figure 1, - Figure 6 is a rear view of the guide piece, - Figure 7 is a front view of the guide piece, - Figure 8 is a side view of the. guide piece provided with the needle, - Figure 9 is an axial section corresponding to Figure 8, - Figure 10 is a side view of the guide piece, - Figure 11 is an axial section view of the guide piece along the plane of Figure 10, - Figure 12 is an axial section of the guide piece of Figure 10, along a plane perpendicular to the section plane of Figure 11, - Figure 13A is a axial section view of a device

  according to the invention, the needle being in posi-

  tion retracted, - Figure 13B is a perspective view of the device in the position of Figure 13A, - Figure 14A is a view similar to that of Figure 13A, but from the outside and turned 90 around the longitudinal axis, - Figure 14B is a view similar to that of Figure 13B, but whose sampling device has rotated 90 around its axis, - Figure 15A is a sectional view similar to that of Figure 13A but the needle being in the extended position, - Figure 15B is a perspective view corresponding to the position shown in Figure 15A, - Figure 16A is a side view of the device, the needle being in the active position, - Figure 16B is a perspective view similar to that

  of FIG. 15B, but whose body of the pre-

  lift was rotated around its 90 axis.

  According to Figures 1, 2 and 13A, the invention

  identifies a blood collection device. This device consists of a sleeve 100 receiving a part 200 carrying a needle 210, one end 211 of which is intended to prick the

  patient and the other end 212 pierces a sample tube

  vement 300 under vacuum. This tube 300 is placed in the sleeve and is connected to the end 212 of the needle, once the needle is planted in the vein. According to FIG. 1, the sleeve 100 has a bottom 110 with an outlet orifice 111 forming a guide bearing and needle outlet. Sleeve 100 body

  (Figure 2) is provided with two diametrically op- posable 120 slides.

  placed and only one of which appears in the sectional view of FIG. 2. This guide and locking slide consists of a longitudinal branch 120a terminated at the front end, on the bottom side 110, by a housing for

  120b locking and, at its rear end, by a housing

  120c locking ment. The locking housing 120b is used to lock the part 200 in the front position, that is to say when the needle has come out of the bottom 110 of the

  sleeve and allows removal and a position of ver-

  rear rusting, in which the guide piece is

  manually towed; it is then locked in position

  retraction, once the sample has been taken.

  The guide and locking slide 120 is

  extends backwards via an entry slide 121 and

  plugging towards the rear end of the sleeve.

  At this rear end, the sleeve carries two

  legs 130, 131 of symmetrical shape, ending in ex-

  curved hoppers not allowing in any case to place the sampling device in a vertical position, on the two legs 130, 131. The curvature and, more generally, the shape

  of these legs is such that they cannot in any case form

  sea a bearing surface for the position described above.

  The input slide 121 (and the diametre slide

  trally opposite associated with the other guide slide and

  lock) opens at the rear as shown in the figure

  gure 5, in the tab by an orifice 122, 123 having the shape of the section of the pins carried by the guide piece as

this will be described later.

  At the front, the bearing 111 has, like the

  be the section of FIG. 4, a shape with ribs 11la

  intended to guide the needle while compensating

  manufacturing tolerances, inevitable since the

  sleeve is a molded plastic part.

  FIG. 3, which is part III on an enlarged scale of FIG. 2, clearly shows the frustoconical shape of the bottom 110, ending with the bearing 111. This view in

  section also shows bosses 112 distributed over a line

  gne (see Figure 5) which define by touch the orientation of the sleeve of the sampling device. As the orientation of the needle is fixed relative to the sleeve, this allows

  know the orientation of the needle, i.e. the situation

  tion of the bevel of the needle, without having to look at my-

precise needle.

  The input slide 121 and its diametric slide

  Lely opposite have a width decreasing from the inlet 122 towards the outlet, that is to say the junction 124 with the slide 120 for guiding and locking at an angle x. At junction 124, there is a narrowed passage point preventing the lug of the guide piece from coming back relative to the width of the slide 120 in the entry slide 121 once past the passage point narrow 124, so as to prevent non-destructive disassembly of the sampling device, but on the contrary, retain the

  guide piece and especially the needle used for a pre-

  raised, trapped inside the sleeve 100.

  The structure of the guide piece 200 will be

  written below in more detail, using the figures

6 to 12.

  The guide piece 200 is in the form of a disc 201 terminated by an enlarged peripheral edge 202 serving to support and guide this piece 200 inside

  of the sleeve. The disc 201 carries, in two diametric positions

  trally opposite, two pins 203, 204, intended to protrude

  slides 120 to be used for gripping.

  The disc 201 also carries two guide legs.

  dage 205, 206, diametrically opposite, intended to come to rest at the end of the race against the inner surface of the frustoconical bottom 110. Finally, in its center, the disc 201

  carries a hub 207 which receives the needle. This hub is rela-

  long enough to hold the needle securely. On the rear face, the disc 101 has spikes 208 intended to be planted in the membrane of the sampling tube and solidari-5 ser or retain the sampling tube with respect to the part

guide 200.

  Figures 6, 7, 8, 9, 10 and 11 show clearly-

  ment the identical shape of the lugs 203, 204 and consisting of a rod 2031 (2041) and a large diameter head 2032 (2042, 2041), this head has, in plan view (Figure 8), a shape elliptical, giving it a large surface facilitating gripping in delicate conditions of use,

  like for example with a gloved hand of a rubber glove-

  cabbage. This shape of the rod 2031, 2042 and of the head 2032, 2042 corresponds to the section of the passages 122, 123 (FIG. 5) at the exit of the entry slides 121 in the legs 130, 131. FIGS. 13A-16B show different views and positions of the parts of the sampling device. So the

  Figures 13A-13B show the sampling device in posi-

  tion neutralized, the needle 210 being again or again retracted inside its bearing 111. This locking position appears in particular in Figure 14A showing

  the lug 203 in the locking passage 120c of the neck

smooth 120.

  FIGS. 15A-16B show the sampling device in the active position, the needle being removed from the bottom of the sleeve and the guide piece being locked in its front position. The collection tube 300 is also

represented.

Claims (6)

R E V E N D I C A T I 0 N S   1) Blood collection device comprising a sleeve fitted with a needle at two ends (211, 212), the first end (211) of which is intended to be inserted into the vein and the second (212) of which is to perforate the plug of the tube vacuum placed in the sleeve, the sleeve having a bottom (110) with an outlet opening (111) and for guiding the first end (211) and two guide and   lock (120) each having two positions of ver-   rusting (120a, 120c), a piece of guide and   rusting (200) carrying the needle in the sleeve (100) having two pins (203, 204) each housed in a slide (120), accessible from the outside of the sleeve (100) for manually passing the needle from its retracted position, set back in the sleeve, in its position of use for which the needle has come out of the sleeve, the slide (120) having a longitudinal part corresponding substantially to the   movement that the needle must make to pass from its po-   position retracted to its position of use and ending at each end by a locking extension,   transverse to the sliding direction cor-   corresponding to each of the two positions of the needle, characterized in that the sleeve has a bottom (100) in the form of a truncated cone whose small base comprises the outlet orifice (111) of the needle, forming a bearing, and the other end of the sleeve   two curved legs (130, 131) preventing the installation of the device positive on this end.   2) Sampling device according to claim 1, characterized in that the slides (120) are extended rearward, each by an input slide (121) opening at the end of the sleeve (100) at the legs (130, 131) for the passage of the pins (203, 204) of the guide piece (200) of the needle (210) during the first installation of this   guide piece with needle.   3) Sampling device according to claim 2, characterized in that   the pins (203, 204) of the guide piece (200) are moved   each, of a head (2031, 2041) of large surface and rounded shape. 4) Sampling device according to claim 1, characterized in that the guide piece (200) is in the form of a disc (201) on board   outer (202) enlarged, carrying, in its center, a hub   length (207) receiving the needle (210) and having on its front surface, two stabilizing lips (205, 206), arranged in a substantially axial plane perpendicular to the plane of the lugs (203, 204) and, on the rear face , spikes (208)   intended to be planted in the membrane of the sample tube   is lying. ) Sampling device according to claim 2, characterized in that each inlet slide (121) has a width decreasing from the rear of the sleeve towards the front to form an outlet   narrow opening into the guide and glass slide   rusting (120) corresponding and preventing the return in the opposite direction of the lug from this guide slide   (120) towards the entry slide (121).   6) Sampling device according to claim 1, characterized in that the truncated cone (110) forming the bottom at the front of the sleeve   (100) has a concave curved shape.   7) Sampling device according to claim 1, characterized in that the outer surface of the truncated cone (110) is provided with   orientation bosses (112), perceptible to the touch.   8) Sampling device according to claim 1, characterized in that the bearing constituted by the outlet orifice (111) of   the needle (210) produced at the end of the truncated cone (110) of the sleeve (100) has internal, axial ribs (illa).