DE1541102B2 - BLOOD COLLECTION DEVICE - Google Patents

Description

3 4

which has a blood collection container 10, part 51 of the sleeve 50 extends from the stop 52

in which blood is collected from a donor. over the weakening line 24 in the lower housing

The blood collection container 10 is provided with a lower section 21. The sleeve is attached over the cannula 40.

End strips 11 provided, through which a not ordered and encloses the same tightly and peelable

The support member shown can be plugged to the loading 5 bar.

To keep container below a dispenser, whereby the line of weakness 24 runs obliquely to

the blood by gravity flow in the container along the longitudinal axis of the feedthrough 29, the swelling

is collected. A lower end portion 12 of the container is substantially flat and around the whole

10 is provided with a centrally arranged passage circumference of the neck section 23 of the housing 20

13 provided, on which a flexible hose 14 ι ο runs and at their horizontal ends in horizontal

for connection to the interior of the container 10 len edge portions 33 and 34 (Fig. 2) ends. When Bre-

connected. A ball lock 15 of the perforations forms the line of weakness opposite

Guide 13 prevents normal cam surfaces 55 and 56 from escaping.

sometimes contained in the container 10 coagulation When using the blood preventive according to the invention By means of the tube 14, the ball 15 collecting device, the needle 37 is inserted into the vein 15 is inserted into the container 10 of a blood donor prior to blood collection, and the blood is shifted so that the blood in them can flow through the collection tube 19 into the blood collection. container transferred after the ball 15 from the end

The container 10 with connections 17 and 18 of the hose 14 has been removed. If the loading

provided for the subsequent supply of the blood. The 20 holder is filled with blood, the hose piece 14 '

Blood collection container 10 preferably has the temporarily locked, for example by clamping

Shape of a bag, which is made of soft polyvinyl with an arterial forceps, then the

chloride. Hose section 14 by knotting, clamping with

The cannula assembly 18 has a housing 20 of a metal ferrule, electronic seal with a bushing 29 in which the cable 25 or the like is sealed. The housing 20 for the cannula Noel 40 is arranged. The housing 20 has one is then grasped by the forefinger and upper hand Section 22 and a lower section 21, men the left hand on the wings 30 or 31 and which by a neck part with a separable thumb and forefinger of the right hand to the Line of weakness 24 releasably connected to each other wings 27 and 28 are placed. Then a are. The widened end 41 of the cannula 40 is applied in 30 finger pressure on the wings to the upper lower section 21 (Fig. 2) anchors and faces and lower housing section in opposite a pointed end for piercing which can rotate in directions as shown in FIG. 4 shown. The over the line of weakness 24 in the upper intercepting rotation of the upper and lower housing sections 22 extends. The end 41 of the cannula is separated in sections in the manner described 35 Sections along the score line 24 are shown enlarged for the purpose of wedging, and if continued, however, any suitable means, such as advancing the rotation, may act the opposite cracks or the like, the radially from the end of the cannula cam surfaces 55 and 56, which are opposite stand outwards and are inclined to fix the cannula on, with a cam effect on each other, lower section 21 of the housing 20 are suitable to the upper and lower housing section 21 be used. 40 or 22 along the longitudinal axis of the implementation

To push the central neck portion 23 of the housing 20 29 away from each other. When the two

has a much smaller diameter on housing sections rotated by 180 ° against each other

than the upper and lower housing sections 21 and are, the mutual displacement of the housing

22, in order to terminate the separation of the housing at the swelling sections by the cam action, and

45 these sections are then pulled apart

opposite directions on the pairs of one to expose the tip 42 of the cannula 40. the

lumpy attached wings 27, 28 and 30, 31 from the tip of the cannula 40 is then in the rubber stop

is practiced on the upper or lower housing from an evacuated sample tube, not shown

cut are formed. The two housings were inserted, the arterial forceps holding the tubing

Sections each have tapered end portions 26 and 25 50 14 'has been pinched off, and the blood is removed

on which the ends of the tube pieces 14 'from the needle 37 flows through the tube 14' and

14 and 14 are each attached, for example through cannula 40 into the trial tube. This creates a

A friction fit, heat seal, or solvent sterile blood sample obtained. The sample tube will be accurate

Sealing. The other end of the hose 14 'is provided with the same markings as that with an intravenous needle assembly 35 conventional 55 blood collection container 10 for the purpose of later mutual

Connected design. A sterility maintenance match when the blood is in the container 10

tende hood 36 sits removably on a needle 37. is fed to a patient.

The tubes 14, 14 ′, the cannula arrangement 18 during the manufacture of the cannula arrangement 18

and form the intravenous needle assembly 35 which is injected into the housing 20 via the cannula 40. Manifold for the drainage of blood from the 60 therefore pushes through the opposing forces

Venous system of a donor for blood collection - the cam surfaces 55 and 56 caused cam action

container 10. kung the housing stuck as a result of the spray

The implementation 29 has an enlarged eccentric section 21 and 22 apart and loosens the

Irish recess or shoulder on their upper cannula in the upper section 22 so that they come out End in the upper housing section 22. A 65 can be taken.

eccentric stop 52 of the sleeve 50 is still further in order to remove the cannula 40

Recess 53 is located and locks the sleeve to facilitate ter, the sleeve 50, over the cannula

30 in the upper housing section (FIG. 3). The main one tightly seated before the housing 20 is injected

puts. This makes it easier to remove the upper housing section, since the sleeve 50 is made of a self-lubricating material Material with a low coefficient of friction, such as nylon. the Cannula 40 can therefore easily be pushed out of sleeve 50. The sleeve 50 also serves to the Maintain sterility of the cannula 40 and prevent blood leakage by creating a tight Sealing at the line of weakness and thereby an escape of blood or impurities through to avoid the perforations of the line of weakness.

The eccentric shoulder 52 of the sleeve 50 is used to anchor the same and therefore the upper one End of the sleeve in the upper housing section 22, so that the sleeve with the upper housing section 22 is moved when the upper and lower housing sections are separated from each other by rotating. Furthermore, this anchoring of the sleeve enables the sleeve to be removed from the cannula, when the upper and lower housing sections are pulled apart, as best shown in FIG. 5 can be seen.

It is noted that although the line of weakness in the figures is at an angle of approximately 45 ° in is shown with respect to the longitudinal axis of the implementation 29, but this angle can be modified can. For example, by increasing the angle of the line of weakness with respect to the Longitudinal axis of the implementation 29 achieved by the mutual action of the cam surfaces 55 and 56 Longitudinal displacement of the housing sections can be increased. By reducing the angle the mechanical efficiency that can be achieved by the cam surfaces acting on one another can be increased will.

Furthermore, the line of weakness 24 in the preferred embodiment is essentially just shown with horizontal edge parts 33 and 34, but it also falls within the scope of present invention that the score line is completely flat or according to FIG. 6 at 24 'one continuous has a curved shape. As long as the score line is a substantially continuous curve or a substantially straight line, proper cam action of the cam surfaces is achieved. The neck portion 23 is shown with a circular cross-section, but a different one can also be used Cross-sectional shape are provided.

The housing 20 is preferably a unitary, pressed or injection-molded element made of hard, separable plastic, such as a polycarbonate or an acetate-butyrate-styrene copolymer. Other Plastics that can be used for the housing are styrene, acrylic resin derivatives and nylon. The sleeve 50 is preferably made of a self-lubricating plastic with a low coefficient of friction, so that the cannula 40 can be easily withdrawn from the sleeve. One for this one Purpose of particularly suitable material is nylon.

In the preferred exemplary embodiment, the line of weakness 24 is made up of alternating strips of material of the housing and empty spaces, it should be noted, however, that in Within the scope of the claims, other forms of lines of weakness can be used, for example by constricting the plastic in the area that is to be separated.

1 sheet of drawings

Claims (4)

1 2 For the sterile withdrawal of blood from the bloodstream claims: it is known to use an airtight closable res container to the outside, which has a connection for the 1. Blood collection device with a blood blood tap and a second connection for one collecting container, a subcutaneous needle, a 5 suction lifter (Swiss patent hollow, separable housing with an upper 222 068). It is also a blood collection device that is one piece a flexible hose, which known the training mentioned above, in which the Container connects to the upper end, one of two tubular halves of the artificial second Piece of tubing, which the lower end of the fabric housing, which accommodate the cannula, in the Bemit the subcutaneous needle connects, one in the region of the line of weakness against each other to the free housing stored cannula, which can be rotated with a result of the cannula (Frenchists End is attached in the lower section and see patent specification 1 337 136). With a pointed end it can be pulled out into the In the known arrangement is the Schwäoberen Section extends, and one on the housing line as the circumference in the housing arranged circumference located line of weakness, which formed Nete annular groove that transversely to the housing longitudinal Breaking the housing into an upper and an axis runs, and it has been shown that when a lower portion facilitated, thereby breaking such a housing assembly often characterized in that the line of weakness encountered difficulty when the cannula is exposed (24) runs obliquely to the longitudinal axis of the housing and 20 is intended to be placed in a sample tube for collecting a as a result, a sample of the donor's blood to be inserted when breaking on the housing opposite, lowing cam surfaces which together- The invention is based on the object that act to form the upper (22) and lower housing blood collection devices such that the sea section (21) in the longitudinal direction from one another to the housing receiving the cannula more effortlessly than separating, if the sections can be separated in opposite directions. th directions rotated with respect to one another. This is achieved according to the invention in that will. the line of weakness at an angle to the longitudinal axis of the housing 2. Blood collection device according to claim 1, runs and thereby marked when breaking on the housing formed by a pair of opposed opposing cam surfaces which are conjoining Wings (27, 28; 30, 31), which each work 30 together to the upper and lower Gehäuam to separate the upper and lower housing section from one another in the longitudinal direction, are ordered. . if the sections are in opposite directions 3. Ice collecting device according to claim 1, gene are rotated with respect to each other, characterized by a sleeve (50), which In a further embodiment of the invention are a surrounds part of the cannula (40) and has a 35 pair of opposing wings which End firmly attached to the upper housing section on each of the upper and lower housing sections. and with a second end they are detachable in the subordinate. Ren housing section is stored. According to one embodiment of the invention 4. Blood collection device according to claim 3, surrounds a sleeve part of the cannula and is with characterized in that the cannula is fixedly attached to the housing with one end and with a widened end in the lower section and a second end detachable in the lower section of the housing is firmly cast and stored with a pointed section. The end can be pulled out into the upper section. The cannula expediently protrudes with a and that the sleeve, which widened the cannula end, can be firmly inserted into the lower section surrounds, with her detachable two. 45 poured and stuck out with a pointed end End past the score line into the lower part into the upper section, and the sleeve which ren housing section protrudes. surrounds the cannula removably, protrudes with her removable second end beyond the score line into the lower housing section. The invention is explained in more detail, for example, with the aid of the figures. It shows F i g. 1 is a schematic view in which the blood collection device according to the invention with the im The invention relates to a blood collection housing mounted cannula is shown, Device with a blood collection container, a 55 Fig.2 a section through the separable subcutaneous tissue Needle, a hollow, separable housing along the line 2-2 in Fig.1, housing having an upper end and a lower end. FIG. 3 is a section along line 3-3 in End, a first piece of a bendable sly- F i g. 2, ches, which the container with the upper end Fig. 4 is a partially sectioned side view, connects, a second piece of tubing, which submerges the 60 in which the housing sections against each other End connects to the subcutaneous needle, rotates are and the opposing cam surfaces cannula stored in the housing, which interact with surfaces, F i g is attached to a first end in the lower section. 5 is a side view of the FIG. 1 illustrated and a pointed end can be pulled out in th device after the separation of the housing covers Upper section extends, and one on the housing 65 cuts and circumference of the weakening line, which the F i g. 6 is a partial side view of another embodiment Breaking the housing into an upper and a lower embodiment of the invention, lower section relieved. In Fig. 1 shows a blood collection device 9.