DE1598181B1 - DEVICE FOR TRANSFERRING SAMPLES OF A BODY FLUID OR OTHER FLOW CAPABLE MEDIUM FROM A DONOR, IN PARTICULAR BLOOD - Google Patents

Description

The sealing membrane would in turn become contaminated

Blood from the intermediate chamber into the container - The invention relates to a device to be guided.
Transferring samples of a body fluid, or neither is it in both embodiments

3 4

It is possible to insert a new collecting container into the dispenser between the limit stops without the valve being slidable from the wall so that the valve is open in the cannula holding position carried in one stop position of the intermediate chamber and closed in the other. tion, including the cannula, moves undesirably, and because of this design of the device, the punctured vein can be destroyed at the puncture or widened painfully without affecting the cannula on the removal side. partly after taking a sample of the body fluid or the like between the cannula parts, the object of the invention is to create the possible valve through longitudinal displacement of the one, a multitude of blood samples or cannula part relative to the other, who-samples of another body fluid or an i ° den, the container can be replaced without the flowable medium from one and the same fluid escaping in the meantime, and a new container point of the donor alternately connected to the device and in different ter in the simplest collection container, as this is opened again in the medi-way the valve,
Zinischen practice is desired, without a particular simplification results from the aforementioned abuses when replacing the 15, the preferred embodiment of the invention, with receptacles such. B. Loss of fluid, on which the displaceable cannula part of the delivery side step and in particular without the vein at the puncture site being impaired when changing the cannula part and the container is tapered at both ends and the valve is taken from a self-closing membrane; ie the cannula should exist when changing the cannula part which can be pierced unaffected by the end of this container facing it in the puncture site, this cannula remaining. In a known device (British patent specification closing member is displaceable in both directions. 662 135) for taking samples differently when a new Licher radioactive liquids are set up, one of which in each case is automatically and in the container is contained in the simplest way for each container of a sample bank, 25 the operator at the same time reopening the is a pierceable stopper for each of the container valve member.

ter provided, wherein the sample expediently opens after piercing in this embodiment

of the stopper are removed by means of a cannula, the receiving-side cannula part in the holder in a

can, the from container to container pivotable receiving-side chamber, which is through the valve in

is. This task to remove different 30 of the closed position from a discharge-side chamber

Samples from a large number of containers are available so the holder is separate. The

In contrast to the task of the invention, limit stops by working together a

from a constant body puncture point one that is firmly seated on the delivery-side cannula part

and the same donor samples of the same type, such as stop rings with the membrane on the one hand and the

Blood to be added to multiple sample containers. The other end wall of the discharge-side chamber

advises, therefore, the solution to be formed according to the invention on the other hand.

Task also not close. The handling of the container when changing

There is also a known plunger (Austria is also simplified by the fact that the holder to

French patent specification 85 208), which has an upper housing part that is open on the delivery side

holding part, a receiving tube and between this 40, which is the collecting container including the closure member

Tube and the container part receives a rotatable tap longitudinally displaceable.

Has closure, no suggestion to solve the The most common field of application of the invention Invention task. The use of such a blood sample collection. However, the ErHahns on the withdrawal cannula of the shut-off valve, it would also be possible to extract other flowable devices extremely cumbersome in terms of construction and 45 ger media from the body of a donor are used, expensive and also impractical for operation. z. B. spinal fluid or other body-farther is a device for taking blood in juices or liquids.

a vacuum container known, with a cannula In the following the invention is in execution

with one to the outside and one to the inside court examples explained in more detail on the basis of the drawings,

ended tip in the end wall of a container loading 50 and that shows

is fixed and with a plug made of elastic F i g. 1 is a side view of a device for

Material sealed vacuum container with multiple sampling of samples,

sem plug longitudinally against the inner needle tip. 2 enlarges a longitudinal section through the

can be pushed (see German utility model 1 880 847). upper part of the device,

Again, this device is only for removal 55 F i g. 3 is a plan view of the needle unit in FIG

a blood sample in one and the same negative pressure - exploded view,

container determined. After pulling out the cannula F i g. 4 to 6 cross-sections according to lines 4-4,

the container is in fact closed again from the stopper 5-5, 6-6 of FIG. 2,

closed, but not the cannula, so that it immediately- F i g. 7 shows a partial section through the valve in one

must be removed early from the vein and from 6 ° other embodiment, with the location of the parts

No further samples are taken from the same part of the body with the valve closed and dash-dotted lines at

men can be. open valve is shown,

The invention solves the problem posed in FIG. 8 a partial section through the valve in a

Device of the type mentioned in that the further embodiment, the position of the parts

cannula part on the discharge side from the intake side ⁶ 5 with the valve closed and dash-dotted with

the sleeve part is formed separately and is shown between the opened valve,

Cannula parts a valve is attached and that F i g. 9 to 12 cuts through a device that

one of the cannula parts in the holder in its longitudinal direction.

5 6

device for multiple withdrawals of blood samples shown tip 26 of the cannula 25 from the membrane 24, is pulled, this passage closes through the F i g. 3 shows the main parts of the device 10 for the self-sealing effect of the membrane 24 again, multiple taking of samples, mainly creating a valve, disassembled state. A conventional cap 33 is provided around the sterile tube 20 for intravenous injection can be used to obtain unity of the intravenous cannula 20. the prick the vein or other source of fluid Protective cap 33 is made of a plastic material will. Depending on the type of material to be removed, it is placed and surrounds the entire exposed area Other types of cannulas can also use cannula 20 for the medium. The open end of the protective cap 33 be det. For this description, the Ent- io fits on the front end 22 of the hollow hub 21 and would accept blood samples. The shaft is held on this by friction. The cap The end of the cannula 20 is with the front end 22 is easily removable by hand to the cannula 20 a conventional hollow hub 21 connected. Introduce this into the vein.

Bonding is achieved by conventional fasteners, all parts of the removal device 10 can

an epoxy resin or similar adhesive, for example, made of inexpensive material, e.g. B. the hub enough. made of plastic, the membrane made of a conventional one

In Fig. 3, the parts are shown at 11, the rubber material and the cannula from each for this belong to a valve 24 and with this common material for single use. These work. The valve itself is of a cost-effective construction and is very easy to manufacture sealing pierceable membrane 24 incorporated into 20 a valve assembly for single use one end of a hub-like housing 30 mounted suitably.

is. The associated parts are a sliding therein. In Figs. 1 and 9 to 12, the removal device is ύ

arranged double-sided cannula 25 and a device 10 in connection with a typical blood impact ring 28, which is shown near one end on the canister. To explain the inventions is attached. 25 dung is a common evacuated Sarnmel

F i g. 2 shows how the aforementioned parts of the discharge container 35 are connected to one another with the self-sealing, pierceable receiving device 10. As mentioned, the cannula 20 is shown in the front end holder 34 for this collection container. The 22 of the hollow hub 21 is attached. The coupling of the parts, which is open on both sides, can be arranged via threaded engagement between the cannula 25 is loosely or slidingly in a bore 41 30, the rear end 32 of the housing 30 and the housing 30. The self-sealing, the front end of the holder 34 are made. If pierceable membrane 24, which consists of a suitable the removal device with the cannula 20 such th elastomeric material that is connected to the holder 34, the tip 27 is inert medium, z. B. of natural double-sided cannula 25 within the holder or synthetic rubber or other polymeric 35-34. The receptacle 10 is then in ready-made materials with elastomeric properties, is on shaft for receiving a variety of blood-suitable ways, for example by epoxy resin E. Samples .

arranged at the front end 31 of the housing 30. 7 and 8 show two optional execution

Front end 31 has a cavity which forms a chamber 40 with shapes and arrangements of membrane 24. Instead of membrane 24. The front 40, the membrane 24 according to Fi g. 2 on the end face of the tip 26 of the cannula 25, which is open on both sides, has to fasten the housing 30, according to FIG. 7, which extends into the chamber 40 fens, which is indicated by the | as the chamber 40. The stop ring 28 delimits the epoxy resin E sealingly in the chamber 40 of the Ge ™ so that the displacement of the cannula 25 is stored within the 45 housing 30, with a widened head part of the chamber 40 when it extends the inner surface of the diaphragm of the pin outside of the housing 30 rests against its 24 during the forward movement or the bottom of the end face.

Chamber 40 touched during the backward movement. F i g. 8 shows a membrane 24 "that is completely

When the cannula 25 lies within the bore of the housing 30 corresponding to one of the chamber 40 and this corresponding distance is displaced, it does not penetrate beyond the 50. Here, too, epoxy resin E can act as the tip 26 of the membrane 24 (cf. FIGS. 7 and 8). The waterproofing can be used. The position of the double-sided material on the cannula 25 can be arranged in dash-dotted stop ring 28 from any suitable lines in FIGS. 7 and 8 or the cannula 25 can be formed after the membrane has been pierced. shown which position a valve in the open position

The front end 31 of the housing 30 is connected to the 55 development, while the fully extended rear end of the hollow hub 21 is connected and the lines dispossessed of a valve in the closed position, for example by the speaking position shown in FIG Membrane retracted epoxy resin E, sealed. When the housing 30 gener tip of the cannula 25 is shown. Also from being connected to the hub 21, the membrane F i g forms. 7 and 8 that the one described above as a partition which interrupts the stop ring 28 'corresponding to the continuous 60 NEN stop 28 from the channel in the removal device 10. malleable or castable material, such as epoxy resin, if the sliding cannula 25 is pushed inward over the length of the cannula 25 and the path of the chamber 40, its cannula pierces through the chamber 40. Tip 26 the membrane 24 and enters the passage Fi g. 1 shows the removal device 10 in FIG

in the front end 22 of the hub 21, creating a 65 connection with a double container 35 in continuous operation Canal from the tip 29 of the intra-finished state.

venous cannula 20 to the rear tip 27 FIGS. 9 to 12 explain the process steps in FIG

the double-sided cannula 25 is created. When taking multiple blood samples. '

In Fig. 9 are the individual parts immediately before the diameter of the bore 41 in the lower part 32 of the shown using the device. Housing 30, there is an air passage to the chimney Fig. 10 is the evacuated receiving tube 35 mer40. Fig. 12 also shows that when pushed forward and in contact with the rear pulling the tube 35 or the plug 36 from the Tip 27 of the sliding double-sided cannula 25 5 cannula 25 the tip 26 of the cannula the membrane 24 brought. The tip 27 penetrates the rubber stopper and leaves air under atmospheric pressure over the 36 of the manifold 35 a. Through which enters the chamber 40 at the inlet passage and thereby air penetrate into the stopper 36 occurring reaction force from the chamber 40 through the cannula 25 pushes out the cannula 25 is advanced in the housing 30 until it automatically removes any blood residues Front tip 26 drilled into membrane 24 can be removed. In addition, blood remains on the or and pierce it. In this position of the cannula 25 eliminated around the rear end of the cannula 25, is a continuous channel from the tip 29 when the cannula is withdrawn from the stopper 36 intravenous cannula 20 to the rear tip 27 of the will. It therefore stands for the next blood sample Cannula 25 is formed. The rear tip 27 is clean and in any case not with blood residues However, at this time there is still a clogged cannula 25 available within the stop 15, which always wiefens 36, and there has not yet been a puncture in the vein connected to the new receiving tubes 48. can be turned, thereby removing the

11 shows the tip 29 of the cannula 20 in the multiple blood samples in a significantly simplified manner. Vein is introduced, whereupon the collecting tube 35 in while after removing the one with the first its foremost position in the holder 34 advanced 20 sample-filled tube 35 the intravenous cannula 20 will. The rear tip 27 of the cannula penetrates the vein and remains in the vein, the membrane 24 is located 25 completely through the rubber stopper 36 and in the closed position and prevents any further damage evacuated receiving tube 35 a. Only now pour. The only thing the operator has to do if the continuous connection has to do with a new manifold in the holder 34 Blood flow from the vein 48 into the receptacle 25 and then as before by opening the tube 35. membrane 24 to take a new sample. This from FIG. 12 shows that after removal the process can be repeated any number of times until the desired amount of blood only the filled tube desired number of samples is present. ** ·· - "- 35 needs to be withdrawn in order to then the whole thing is a compact device against a new tube for taking the next 3 ° multiple sampling, the one with a pro-sample to replace. Namely, when the tube 35 connected ben container, a backflow-free and withdrawn and at the same time the rear end 27 of the listless blood withdrawal in any repetition Cannula 25 is pulled through the rubber stopper 36, allows. No difficult operation is enough the friction between the plug 36 and the rule must be followed and are not external Cannula 25 for withdrawing the cannula 25 from the 35 valves or other out-of-membrane 24 complicating the device. As soon as the tip 26 armors the membrane 24. The device can be used in sterile leaves, the flow is made available and maintained thanks to the self-sealing state Property of the membrane 24 interrupted. and can be made of cheap material, so that Since the diameter of the cannula 25 is smaller than that it can be disposed of after use.

For this 1 sheet of drawings ■ ': "

209 532/357

Claims (6)

1 2 claims: another fluid medium from one 1. Device for transferring samples from a donor, especially blood, from the body of the donor body fluid or another that flows into a collecting container with an elastic material consisting of a capable medium from a dispenser, in particular pierceable whose blood, from the body of the donor is provided in a 5 locking member, by means of one on each collection container, the one from the piercing side and one from the delivery side in its longitudinal bar existing elastic material over a cannula holder protruding and Closing member is provided, by means of a cannula part which is tapered at the outer end, wherein on the receiving side and one on the delivery side in their the delivery-side cannula part on the cannula holder so Is stored in the longitudinal direction via a cannula holder in front of io that when the container is brought up to protruding and tapered at the outer end for striking the holder, the closure member Cannula part, the delivery-side cannula part piercing and when the container is withdrawn is mounted on the cannula holder in such a way that it leads to the closure that closes again in the process the container emerges until it hits the limb. the holder pierces the closure member and i ₅ In a known device of the aforementioned type when the container is withdrawn from it (French patent 935 122), the upper when the closure member closes again, the end of an evacuated collecting container for a exits, characterized in that blood sample by means of a closure member made of elastic that the cannula part (25) on the delivery side is closed by the open material that cap- The cannula part (20) on the take-up side is overlapped in a manner that is separate and unique. Above the one membrane is formed and between the cannula parts (20, the end wall of the capsule is secured by a 25) a valve (24) is attached and that a shaped cannula holder has a closed intermediate the cannula parts in the holder (21) in its longitudinal chamber between the membrane and one of the direction in such a way between limit stops lumpy cannula-bearing part from the elastic is displaceable that the valve (24) is formed in the one material of the capsule, either The stop position is open and in the other is integral with the closure part or the capsule is closed. or by means of a separately and tightly closing 2. Apparatus according to claim 1, characterized in that this closure part is attached cup-shaped draws that the sliding cannula part of the part. By pressing the receiving side is the delivery-side cannula part (25) and on both 30 wall of the intermediate chamber is over this Ends (26, 27) is pointed, that the valve from the wall in the intermediate chamber protruding cannula of a self-closing membrane (24), pointed through the front membrane of the locking switch from the end facing her (26) of this member pushed through and into the frontal one Cannula part (25) can be pierced, and that the opening of the collecting container is inserted. At the Zuses The cannula part (25) when applied by withdrawing the cannula goes to the receiving-side the container closure member (36) in both Rieh- wall of the intermediate chamber in their original is displaceable. Position backwards and push the tip of the cannula into it 3. Apparatus according to claim 1 or 2, characterized back chamber, wherein the frontal membrane indicates that the cannula on the receiving side closes again. part (20) in the holder (21) in a receiving-side 40 Such a sampling device is used for blood samples Chamber (42) opens, which through the valve (24) for taking only one sample into and into the in the closed position from the same collecting container on the delivery side and cannot do so Chamber (40) of the holder is separated. used by one and the same vein of the 4. Apparatus according to claim 2 or 3, characterized in that donors consist of several blood samples in several, denotes, that the limit stops 45 alternately connected to the device collecting through Working one can be found on the dispensing container; because after removing the side cannula part (25) fixed stop container, blood would get into the when the rings (28) with the membrane (24) on the one hand and cannula enter evacuated chamber and this verder other end wall of the discharge side unclean, so that when you remove the Chamber (40) on the other hand are formed. 50 cannula unreliably contaminated blood into the 5. Device according to one of claims 1 to 4, would take new container. Besides, would characterized in that the outer diameter of the evacuated first container in the first-mentioned The knife of the cannula part (25) on the delivery side is no longer reduced when it is removed is considered to be the diameter of the bore of the closed and impurities from the surrounding area the holder (21) connected part (30), in 55 environment, which is also in the which this cannula part can be displaced lengthways in practice is inadmissible. On the other hand, if at the anist and with which he has an air-permeable channel whose embodiment of the known device of forms. filled container when removing the collecting container 6. Device according to one of claims 1 to 5, ters remains closed, would when replacing characterized in that the holder (21) to 60 of the container blood from the then free end of the cannula an open, preferably cylindrical, exit on the delivery side and pollute the environment, in particular Housing part (34) is formed, which the other also the closure membrane of the new, in the Collection container (35) including closure member (36) wall of the intermediate chamber inserted second accommodates longitudinally displaceable. Collecting container. When the