DE202005013182U1 - Needle holder for use in drawing venous blood from patient, has support elements, formed to needle holding part, which stabilizes same holding part within needle container - Google Patents

Abstract

Support elements, formed to a needle holding part (4), stabilizes the same holding part within a needle container (2). The needle holding part also has anchors (13) engaged to an unlocking mechanism (6) at the top of the needle container. Each anchor has a flexible lever (14a,14b) with a projection (15a,15b) at the upper end.

Description

The The invention relates to a cannula holder with a cannula container, with one releasably anchored from the inside of the cannula container the cannula holder fixed cannula holder for receiving a cannula and / or an adapter for attaching a cannula, wherein the cannula and / or the adapter from the outside through an opening in the cannula holder in the cannula holder is fastened. The cannula holder indicates a release mechanism for releasing the cannula and / or the adapter the use such that the needle holder after loosening the Anchoring with the cannula or the adapter falls into the cannula container.

such needle holder be in the medical care of patients in particular at the venous Blood collection used. It can both pre-evacuated blood collection tubes and piston-operated ones Blood collection tubes, eg. Pre-evacuated syringes, used on the cannula holder be plugged.

To the use of the needle holder the on the cannula holder applied cannula or disposed of the appropriate adapter for attaching a cannula become. This is for the staff responsible for collecting the blood is particularly dangerous, because there are always stab wounds with blood-contaminated needles comes.

Therefore Various safety cannula holders have been proposed at which the cannulas follow can be disposed of safely by using the contaminated ones needles taken after use in the cannula container of the needle holder which can be closed at least at one end.

Such a cannula holder is for example from the US 5,769,826 known, in which a cannula is integrally connected to a cannula holder, which is fixed under spring tension from the inside in the needle holder at one end of the cannula container. After use, the cannula holder on the cannula holder can be unlocked so that the cannula is retracted into the cannula holder after use and safely discarded. However, this cannula holder has the disadvantage that the cannula holder with the cannula permanently fixed therein must be fastened from inside the cannula holder. In practice, it is necessary to package completely prefabricated cannula container with already plugged sterile and deliver it for use. However, since different cannula holder with different needle types of cannulas are needed, separate needle holder must be manufactured for each needle type, shipped and stored at the blood collection sites. This is too expensive and expensive. In addition, due to the spring preload, there is the problem that the cannula is not securely fixed to the cannula holder and the cannula can pivot during use when punctured with respect to the central axis of the cannula holder. This makes it difficult for the blood-removing staff, for example, to safely hit the patient's vein.

From the US 5,810,775 a similar cannula holder is known in which along the outer wall of the cannula container, a second inner wall is provided which is slidably mounted in the cannula container and fixed at its front end by friction, a likewise spring-biased cannula holder. A cannula can be screwed into the cannula holder from the outside. After use, the rear end of the cannula holder is closed with a cap, whereby the second inner wall mounted in the cannula container is displaced forward, thereby releasing the cannula holder so that it drops together with the cannula into the interior of the cannula container. However, this triggering mechanism is not safe because, when introducing blood collection tubes into the cannula holder, it can happen that the inner wall is displaced and the cannula holder is already released while the cannula is still fixed in the arm of the patient. This is especially true in the case where several blood collection tubes are to be removed on the patient's arm. In addition, the front opening of the cannula holder is not closable, so that there is a risk that the cannula falls out after receiving in the cannula container forward again from the front opening or drips contaminated blood from the cannula through this opening.

Another cannula holder is known from WO 2005/039677 A1, which describes a cannula holder with a cannula holder fixed from the inside to the cannula holder, into which cannula can be inserted from the outside through an opening in a first end side of the cannula container. After use, the cannula holder can be unlocked by an externally actuated unlocking mechanism, so that the cannula holder with the attached cannula reliably falls into the cannula container of the cannula holder even without a spring bias. In this case, the unlocking mechanism can be formed by means of a slider so that after unlocking the cannula, the opening in the cannula holder for the passage of the cannula is closed at the same time. Although the cannula holder is locked directly to the cannula holder, it has been found in practice that, even with this cannula holder, the cannula is not fixed stably enough to the cannula holder and with respect to the center axis of the cannula holder can pivot.

task The present invention is therefore the, in WO 2005/039677 A1, returning to the same applicant cannula holder such to further develop that the cannula held in the cannula holder safely on the cannula holder is fixed.

These Task is according to the invention with the Characteristics of claim 1, in particular solved by at the cannula holder at least one support element for stabilizing the needle holder provided in the cannula container is. By such an additional supporting at the cannula holder the freedom of movement is attached to the cannula holder or cannula container cannula holder substantially restricted, so that the cannula is set much safer on the needle holder.

there it has proven particularly advantageous for the stability of the cannula, when the anchor for attaching the cannula holder to the cannula container and the support element each attack on an end face of the cannula container through which the cannula when using the needle holder protrudes.

there can be anchored by at least one mounting hole in the end face of the cannula container of pass through inside and be releasably anchored to the outside of the cannula container. In particular, the anchoring can penetrate from the inside out of the cannula container on the outside of the cannula container locked be, so that this latching is easily solvable from the outside and the needle holder in solving the latching by the unlocking mechanism into the interior of the cannula container is pressed.

In In this case, it is particularly advantageous if the support element on the inside of the cannula container, in particular its front side, supporting abuts, because thereby a counter support to the passing through the cannula container Locking is achieved. As a result, the cannula holder in the cannula container becomes particular securely fixed as long as the cannula holder at the cannula container or needle holder is fixed.

at a preferred embodiment of the cannula holder according to the invention are at least two anchors and / or at least two support elements at the cannula holder intended. Through a total of four anchoring or support points the cannula holder on the cane holder This results in a particularly stable attachment of the cannula holder.

To can the plurality of anchors and / or support elements around a receiving opening of cannula holder for the cannula and / or the adapter so that the cannula in particular in the direction of the passage axis, which in the axial direction of the central axis of the cannula holder is well stabilized.

there can preferably two anchors along a first line on opposite sides Sides of the receiving opening and two support elements be arranged along a second line on opposite sides of the receiving opening, wherein the lines intersect, for example, in the center of the receiving opening and in particular are arranged at right angles to each other. Thereby are Mounting or support elements in a 90 ° distance to each other provided so that the cannula stabilized well and safely in every direction.

The cannula holder can according to the invention a disc have, which corresponds in shape to the inner cross section of the cannula container, so that the disc is flush insertable into the cannula container and is movable in it. Through this disc-like structure of the cannula holder let the anchors according to the invention and support elements especially easy on the needle holder establish.

moreover can enter on the inside of the cannula container inwardly projecting projection, for example. In the form of a bead formed be such that the inner diameter of the cannula container in the region of the projection smaller than the outside diameter the disc of the cannula holder. This ensures that the needle holder after pressing the Unlocking mechanism then not from the needle holder fall out if previously forgotten, use the open side of the cannula holder with to close a cap. By this inventive projection on the inside of the cannula container, in particular in connection with the disc-like design of the needle holder, the safety of the cannula holder according to the invention can therefore be further increased.

Around to the cannula holder not just pre-evacuated vacuum tubes connect to be able to the cannula holder an adapter piece to syringes, evacuated blood collection tubes with airtight therein sliding piston or other provided with a connection system Extraction vessels to the needle holder to join. This adapter piece is preferably formed as a separate component, which on the cannula holder can be attached so that the cannula holder in a simple way flexible for Various blood vessels adaptable is.

According to one particularly preferred embodiment is the adapter piece at the cannula holder fixable or integrally formed with the cannula holder.

To can the adapter piece attachment projections having, which with openings in the cannula holder, preferably in the disc of the cannula holder, can be latched. That way you can For example, various adapters are provided in a blood collection set be, which still before using the needle holder with the needle holder be connected, so that the system due to this modular design a particularly big one flexibility having.

to Safety can be the adapter piece trained longer be as the projecting into the interior of the cannula container part of the cannula and / or of the adapter to puncture wounds when applying the adapter piece the needle holder to avoid.

Further Features, advantages and applications of the present Invention will become apparent from the following description of embodiments and the drawing. In this case, all described and / or illustrated Features for itself the subject of the present invention, also independent of their summary in the claims or their remittances.

It demonstrate:

1 a partial cross section through the cannula holder according to the invention;

2 the unlocking mechanism of the needle holder according to 1 in cross-section;

3 a plan view of the cannula holder according to the invention;

4 a first side view of the cannula holder according to the invention according to 3 ;

5 a second, opposite 4 rotated 90 ° side view of the needle holder according to 3 ;

6 a cross section through the cannula holder according to the invention along the line AA according to 3 ;

7 a plan view of the adapter piece according to the invention and

8th a cross section through the adapter piece along the line BB according to 7 ,

The in 1 illustrated cannula holder 1 has an elongated, cylindrical cannula container 2 for receiving a standard cannula 5 on. The cannula container 2 has on a first, in the representation lower end side a closable opening 3 , On the opposite front side can, as in 2 shown in detail, from the inside a cannula holder 4 detachable on the cannula container 2 or the needle holder 1 be determined. Into the cannula holder 4 is a standard cannula 5 screwed on, which, how out 2 visible, into the interior of the cannula container 2 projects through. This can be the cannula 5 through an opening in the cannula container 2 from the outside in the cannula holder 4 set, for example. Screwed in as usual.

For blood collection, the free end of the cannula 5 pierced into the vein of the patient and that in the cannula container 2 located end of the cannula 5 through the opening 3 an unillustrated blood collection tube or the like blood collection tube attached. After taking the blood, the blood vessel is withdrawn and the cannula 5 pulled out of the vein of the patient. The cannula holder 1 with the cannula 5 must now be disposed of. To exclude an injury from a needlestick, the cannula should 5 into the cannula container 2 be recorded.

This will be the opening 3 initially closed with a cap, not shown, which is simply plugged. Thereafter, an unlocking mechanism 6 operated, which at the second end face of the cannula container 2 attached and configured such that the cannula 5 after actuation of the unlocking mechanism 6 into the cannula container 2 falls. For this purpose, the unlocking mechanism 6 , as in 2 shown in the sectional drawing, two slides 7 . 8th on, which by one on the front side of the cannula container 2 trained lead 9 be held and guided. The lead 9 is on two opposite sides of the cannula container 2 formed and each has a serving as a guide groove 10 on. The in the grooves 10 guided slide 7 . 8th have beveled surfaces on their facing inner sides 11 . 12 , which at the anchorage 13 the cannula holder 4 attack.

The anchoring is by two flexible arms 14a and 14b formed, with the arms 14a . 14b from one side of the cannula holder 4 protrude and by one in the second end face of the cannula container 2 trained mounting holes are performed. On the from the cannula container 2 outstanding end of the arms 14a . 14b are each outwardly directed, wedge-shaped projections 15a . 15b formed, which with a laterally outwardly directed shoulder on the Außensei te of the cannula container 2 engage and taper towards its end.

The beveled surfaces 11 . 12 the slider 7 . 8th grab the wedge-shaped protrusions 15a . 15b the flexible arms 14a . 14b and push them inward when the sliders 7 . 8th be pushed together. This will be the wedge-shaped projections 15a . 15b on the outside of the cannula container 2 solved and the needle holder 4 due to the wedge-shaped formation of the projections 15a . 15b and the tapered surfaces adapted thereto 11 . 12 into the interior of the cannula container 2 pressed, with the slightly zusammenge pressed flexible arms 14a . 14b through the attachment openings in the cannula container 2 be pushed through.

The condition in which the cannula holder 4 with the screwed cannula 5 inside the cannula container 2 is included in is 1 shown.

To drop out of the cannula holder 4 with the cannula 5 to prevent, even if accidentally forgotten, the opening 3 of the cannula container 2 before triggering the unlocking mechanism 6 to close, is on the inner wall of the cannula container 2 a lead 16 formed in the form of a bead, the falling out of the cannula holder 1 from the cannula container 2 also with open opening 3 prevented. For this purpose, the needle holder 4 a disk 17 on, which in shape to the inner cross section of the cannula container 2 matches, making the disc flush with the cannula container 2 insertable and movable therein. The free inner diameter of the cannula container in the region of the bead-like projection 16 is smaller than the outer diameter of the disc 17 so that the cannula holder 4 not from the cannula container 4 fall out.

For inserting the needle holder 4 must the disc 17 with force over the bead 16 be pressed. However, this is possible without risk of injury because at this time the cannula 5 not yet in the needle holder 4 screwed. By pushing up the needle holder 4 become the projections 15a . 15b from the outside at the upper end side of the cannula container in the illustration 2 latched and before use of the needle holder 1 a cannula from the outside through a corresponding opening in the cannula container 2 into the cannula holder 1 fixed needle holder 4 screwed.

To the in the cannula holder 4 screwed cannula 5 in the cannula holder 1 to stabilize, are on the base in the disk-shaped cannula holder 4 in addition to anchoring 13 with the flexible arms 14a . 14b and the projections 15a . 15b support elements 18 . 19 provided, which of the disc 17 the cannula holder 4 in the same direction as the flexible arms 14a . 14b protrude. Both as anchoring 13 serving flexible arms 14a . 14b with the projections 15a . 15b as well as the support elements 18 . 19 are around a receiving opening 20 of the cannula holder 4 for screwing in the cannula 5 arranged around. The two anchorages are in the form of flexible arms 14a . 14b along a first line L1 on opposite sides of the receiving opening 20 and the two support elements 18 . 19 along a second line L2 also on opposite sides of the receiving opening 20 arranged. The lines L1 and L2 are arranged at right angles to each other and intersect at the center of the receiving opening 20 , which with the cannula axis in the receiving opening 20 screwed cannula coincides. By this arrangement of the flexible arms 14a . 14b for anchoring the needle holder 4 on the cannula holder 1 and the support elements 18 . 19 will be a particularly high stabilization of the cannula 5 reached.

These include, like the 90 ° rotated side views of the needle holder 4 according to the 4 and 5 show the flexible arms 14a . 14b with the projections 15a . 15b further away from the disc 17 the cannula holder 4 before than the support elements 18 . 19 , This will keep the wedge-shaped projections 15a . 15b the needle holder 4 in the locked state of a falling back of the needle holder 4 into the cannula container 2 down while the support elements 18 . 19 a displacement of the needle holder 4 towards the front of the cannula container 2 prevent at the the cannula holder 4 is fixed. This results in the cannula holder 4 im with the cannula container 2 latched state no more freedom of movement, leaving the cannula 5 overall is securely fixed.

Furthermore, in the disc 17 the cannula holder 4 openings 21 provided, in each case at the same distance between a support element 18 . 19 and a flexible arm 14a . 14b are arranged. Around the openings 21 is like the cut according to 6 along the line AA 3 to see the disc 17 strengthened.

The openings 21 at the cannula holder 4 serve the attachment of one in the 7 and 8th shown adapter piece 22 , which at the anchorage 13 opposite side of the disc 17 the cannula holder 4 can be set to syringes, evacuated blood collection tubes with a piston displaceable therein airtight or blood collection tubes provided with other connection systems on the cannula holder 1 to be able to connect. The adapter piece 22 can there be variably adapted to the appropriate connection system. This can be done in the adapter piece 22 corresponding grooves 23 or slots are formed with which the blood collection vessel to the adapter piece 22 can be securely connected. The in the 7 and 8th shown grooves 23 are merely exemplary and do not limit the subject invention.

To set the adapter piece 22 in the openings 21 the cannula holder 4 are on an upper flange 24 with which the adapter piece 22 at the cannula holder 4 can rest, mounting projections 25 provided in the openings 21 the cannula holder 4 are latched. As from the cross section of the adapter piece 22 according to 8th off along the BB line 7 can be seen, are the mounting projections 25 up from the flange 24 of the adapter piece 22 in front.

With the modular in the overall concept of the needle holder 1 insertable adapter piece 22 The cannula holder can be flexibly adapted to a variety of blood collection tubes and used in conjunction with these. Thus, according to the present invention, a cannula holder 1 proposed, which is universally suitable for all blood collection containers, a particularly safe, with one hand executable disposal of the needle holder 1 after use, allowing the cannula 5 safely in the cannula container 2 of the cannula holder 1 is recorded. Due to the cannula holder according to the invention 4 is the cannula 5 Also stabilized during use.

1

needle holder

2

needle container

3

opening

4

cannula holder

5

cannula

6

unlocking

7

pusher

8th

pusher

9

head Start

10

groove

11

beveled surface

12

beveled surface

13

anchoring

14a, b

more flexible poor

15a, b

head Start

16

Head Start, bead

17

disc

18

support element

19

support element

20

receiving opening

21

openings

22

adapter piece

23

groove

24

flange

25

fixing projection

L1

first line

L2

second line

Claims (13)

Needle holder with a cannula container ( 2 ), one with an anchorage ( 12 . 15a . 15b ) from the inside of the cannula container ( 2 ) releasably attached to the cannula holder ( 1 ) fixed cannula holder ( 4 ) for receiving a cannula ( 5 ) and / or an adapter for attaching a cannula, wherein the cannula ( 5 ) and / or the adapter from the outside through an opening in the needle holder ( 1 ) in the cannula holder ( 4 ) and with an unlocking mechanism ( 6 ) for releasing the cannula ( 5 ) and / or the adapter after use such that the cannula holder ( 4 ) after loosening an anchorage ( 13 . 15a . 15b ) with the cannula ( 5 ) or the adapter received in the cannula container ( 2 ), characterized in that at the cannula holder ( 4 ) at least one support element ( 18 . 19 ) for stabilizing the cannula holder ( 4 ) in the cannula container ( 2 ) is provided. Needle holder according to claim 1, characterized in that the anchoring ( 13 . 15a . 15b ) and the support element ( 18 . 19 ) on an end face of the cannula container ( 2 attack). Needle holder according to claim 1 or 2, characterized in that the anchoring ( 13 . 15a . 15b ) by at least one attachment opening in the end face of the cannula container ( 2 ) from the inside and on the outside of the cannula container ( 2 ) is releasably anchored. Cannula holder according to one of the preceding claims, characterized in that the supporting element ( 18 . 19 ) on the inside of the cannula container ( 2 ) abutting. Needle holder according to one of the preceding claims, characterized in that at least two anchorages ( 15a . 15b ) and / or at least two support elements ( 18 . 19 ) are provided. Cannula holder according to claim 5, characterized in that the anchors ( 15a . 15b ) and / or the support elements ( 18 . 19 ) around a receiving opening ( 20 ) for the cannula ( 5 ) and / or the adapter are arranged around. Cannula holder according to claim 6, characterized ge indicates that two anchorages ( 15a . 15b ) along a first line (L1) on opposite sides of the receiving opening ( 20 ) and two support elements ( 18 . 19 ) along a second line (L2) on opposite sides of the receiving opening ( 20 ), wherein the lines (L1, L2) preferably in the center of the receiving opening ( 20 ) are cut and arranged at right angles to each other. Needle holder according to one of the preceding claims, characterized in that the cannula holder ( 4 ) a disk ( 17 ), which in their shape to the inner cross section of the cannula container ( 2 ) corresponds. Needle holder according to one of the preceding claims, characterized in that on the inside of the cannula container ( 2 ) an inward projection ( 16 ) is trained. Needle holder according to one of the preceding claims, characterized in that the cannula holder ( 1 ) an adapter piece ( 22 ) to syringes, evacuated blood collection tubes with a hermetically displaceable ble piston therein or other provided with a connection system withdrawal vessels to the needle holder ( 1 ). Cannula holder according to claim 10, characterized in that the adapter piece ( 22 ) on the cannula holder ( 4 ) fixable or in one piece with the cannula holder ( 4 ) is trained. Cannula holder according to claim 10 or 11, characterized in that the adapter piece ( 22 ) Fastening projections ( 25 ), which with openings ( 21 ) in the cannula holder ( 4 ), preferably in the disc ( 17 ) of the cannula holder ( 4 ), are latched. Needle holder according to one of claims 10 to 12, characterized in that the adapter piece ( 22 ) is longer than that in the interior of the cannula container ( 2 ) protruding part of the cannula ( 5 ) and / or the adapter.