FR2725611A1 - Extraction and protection sleeve for catheter needle - Google Patents

Abstract

The sleeve has a body (2) of the same length as the needle (1a) in which slides the extractor (3). One end of the tube has a fixing for the catheter and the other end is open for the passage of the extractor. The extractor removes the needle using gripper arms (3c) with a coupling to the tube body, a manipulation guide and a stop w.r.t. the tube.

Description

DH PROTECTION HT DEVICE
DHXTRACTION FOR STERIBL DS PUNCTION
DZ BIOLOGICAL LIQUIDS
The present invention relates to a protection and extraction device for equipment for puncturing biological liquids.

 Puncture materials have a hollow rod used to dilate a vein or artery, to remove biological fluids from them, or to introduce liquids into them. The placement in the patient's body is done using a needle, called a puncture needle. When the puncture material is placed in the patient's body, the puncture needle should be removed from the catheter and stored in a container for destruction. The instant the needle is withdrawn, the end of the needle is bare and a risk of accidental puncture appears and persists until the needle is stored before destruction. With this risk of accidental puncture, there is a danger of contamination of personnel handling the puncture needle.

 Traditionally, two techniques exist to mitigate this risk.

 The first protective technique consists in fixing a cap on the bare end of the needle, but practice shows that the gesture of covering the end of the needle induces risks of accidental punctures. Staff also do not always have time to cap the tip of the needle, and therefore the risk persists.

 The second technique of protection against accidental punctures consists in associating with the tip disposed at the non-pointed end of the needle a protective sleeve of length at least equal to that of the needle. The protective sleeve is associated with the end of the catheter located either outside or between the needle and the body of the catheter. Once the puncture has been performed, the needle is withdrawn by sliding the endpiece linked to the non-pointed end of the needle into the protective sleeve, until the entire needle is caught in the sleeve. This protective sleeve is then dissociated from the catheter and stored before destruction.

 This second protection technique has the disadvantage of being impractical to use. Indeed, the presence of the protective sleeve placed on the catheter considerably increases the total length of the device for placing the catheter on the patient's body, which is detrimental to the effectiveness of the manipulator's gesture. In addition, such devices require the creation of several new machining parts, which considerably increases the price of the device.

 The present invention provides automatic protection against the risks of accidental punctures by the puncture needle, and the dangers of contamination which result therefrom.

 The present invention initially serves as a device for protecting the catheter when it is new and placed in its packaging. This system replaces the cap which is systematically placed on these devices to protect the new needle.

 When using a catheter, whatever its type and brand, the manipulator removes the new device (which can adapt to all existing models on the market, without having to modify them) as it does with the current caps, and works freely with the catheter, without any discomfort in its handling. When he has to make the gesture of removing the blood-stained needle from the patient's body, he again grasps the protective device by presenting it by the end opposite to that which served to protect the new catheter.

 The new catheter protection (1) consists of a cylindrical body (2) in which slides an extractor (3) for needle puncture material.

 As soon as the manipulator has grasped the new device (2), he presses on the guide (3a) to remove the extractor (3) from the body of the device. As soon as the rear part of the needle (la) is grasped by the extractor (3c), the manipulator pushes back the extractor (3), which triggers the ejection of the needle (la) from the body of the catheter, needle, which is immediately trapped in the body of the protection device (2), without being able to come out or come into contact with the skin of the manipulator.

 The gesture is extremely simple, and does not affect the efficiency of the manipulator. Quite the contrary, the fact of extracting the puncture needle safely eliminates the apprehension of the manipulator of pricking, and thus improves the efficiency of his gesture.

 The present invention is described without limitation in the attached diagrams. I1 are several variants of the new device, which allow it to be built using simple manufacturing techniques, all as effective as each other.

 The advantage of this new device is that it can adapt to all existing puncture equipment devices on the market today, that it is extremely simple, and that therefore all manipulators can use it without any difficulty. On the other hand, this new device requires only one more piece than for the manufacture of the materials on which it will be placed. Indeed, it consists of a maximum of 2 parts, but removes one which is the cap of current devices.

 A manufacturing variant allows this device (2 + 3) to be produced in one piece, which considerably reduces the price, and does not add any part to the design of catheters as they are produced today.

 A solution also studied makes it possible to transform this device into original packaging, and consequently to further reduce the cost of puncture equipment.

 In any case, the invention will be clearly understood with the aid of the description which follows, with reference to the appended schematic drawings showing by way of nonlimiting examples, several embodiments of this new device.

FIGS. 1, 2 and 3 are views in longitudinal sections of the phases of use,
FIGS. 4, 5, 6, 7 and 8 are longitudinal sections constituting alternative embodiments of the part 2,
FIGS. 9 are perspectives showing alternative embodiments of the part 3,
FIGS. 10, 11 and 12 are sectional and perspective views of an alternative embodiment of the complete device in one piece,
Figure 13 is a longitudinal section showing the possibility of using the device 2 as packaging
FIG. 1 represents a new catheter (1) placed in the protection device (2) serving in the initial phase of the cap. The end (2a) of the body (2) is preformed to adapt to all types of catheters, in the same way as the fixing of (1) on any cap existing on the market. The length of the body of (2) is slightly greater than the length of the catheter (1), so as to place it in the body (2) with the extractor (3). Likewise, the internal diameter of the body (3) is slightly greater than the external periphery of the catheter (1).

 Figure 2 shows the principle of extraction of the catheter (1) by the extractor (3).

As soon as the user begins to withdraw the needle (la) from the body (lb) of the catheter (1), the manipulator resumes the device (2), pushes back with a finger which presses on the guide (3a) the extractor ( 3c) outside the body (2). The guide (3a) slides in a rectilinear reservation (2c) of the body (2). The extraction system (3c) opens, providing a larger opening than the outer periphery of the catheter (la). When the manipulator has positioned the extractor (3c) on the head of (la), it pushes back the extractor (3) in the body (2), which has the effect of closing the jaws (3c) of the 'extractor (3), and thus to trap the catheter (la) in the extractor (3). By continuing to push the extractor (3) back into the body (2), the catheter (la) enters the protection device (2).

 Figures 3 show the needle (la) of the catheter (1) fully retracted into the protection device (2). The catheter (1) is also shown with its 2 parts; the sheath (lb) which remains in the patient's body, and the needle (la) which must be removed and protected.

 Figures 4 show a variant on the extractor manufacturing system (3). In this variant, the extractor (3) is connected to the body (2) by an elastic type system (4) or spring, fixed to the extractor (3) by a fixing (3d), and to the body (2) by a fixing (2b). The guide (3a) of the extractor (3) slides in a reservation (2c) of the body of (2) comprising a baffle (2d) which allows the guide (3a) of the extractor (3) to remain in a position given, without retreating into the body of (2) under the effect of the tension of the system (4). After entering the needle (la) under the same conditions as those mentioned in the previous paragraph, the user slightly rotates the guide (3a) in the reservation (2c, 2d), which will allow the guide to move back into the reservation (2c), thus trapping the entire needle (la) in the body (2). The advantage of this variant is to create tension between the body (2) and the extractor (3) , which allows the extractor to automatically trap the needle (la) in the body (2), and thus reduce the gestures of the manipulator to simplify the gestures. FIG. 4B shows a top view of the position of the reservation (2c, 2d) which makes it possible to create a baffle to block the guide (3a).

 Figures 5 show a variant of the locking system of the extractor (3) in the body (2). The inner body of (2) has teeth (2e) which will come into contact with the teeth of (3e). The teeth have an inclination such that it will be impossible for the extractor (3) to come out of the body (2).

 Figures 6 show a variant of the locking system of the extractor (3) in the tube (2). The internal body of (2) has an inclined shape (2f) which will serve as a locking system for the extractor (3). The inclination of (2f) will allow a blockage such that it will be very difficult for the extractor (3) to come out of the body of (2).

 Figures 7 show a variant of the system described in Figure 4. The reservations (2c and 2d) made on the body (2) are replaced by a pawl (2g), placed on the body (2), which keeps in position l 'extractor (3). To bring the needle (la) into the body (2), simply press the pawl (2g). the elastic device (4) will immediately roll back the extractor (3), which will be placed at the bottom of (2).

 Figures 8 show a variant of the system described in Figure 3. Only a lug (2h) placed in the body of (2) allows the end of travel to the extractor (3) to be blocked at the bottom of (2) .

 Figures 9 show variants of the lamella device (3c) of the extractor (3). The device comprises a tube (3b) which slides in (2) and a grip system (3c) which can be simplified in the form of a standard jaw (3f), of a standard gripping vee (3g) forming a hook , two clamping arms (3h) or standard pin strips (3i). These four variants have the advantage of freeing up a view of the catheter for the user, and thus of improving the precision of his gestures.

 FIG. 10 shows a variant of manufacturing the parts (2) and (3), produced in a single injected part, which considerably reduces the manufacturing costs. The link (5) which connects the body (2) to the extractor (3) can also serve as an aid to the automatic extraction of the needle (la) as does the device (4).

 Figure 11 shows in exploded view the protection with the body (2) closed by clips (2h), and the extractor (3) placed in the waiting position. The link (5) can also serve as a spring. According to certain manufacturing methods, it is possible to manufacture the parts (2) and (3) connected by (5) without the need for these clips.

 FIG. 12 shows in exploded view the catheter (1) placed in the protection (2).

 Figure 13 shows a possibility of using the protective device (2) as original packaging. The envelope (6) can be produced with an inexpensive film, and very simple to manufacture. It is possible to grip the body of (2) firmly, to create an opening in (5) without coming into contact with the catheter (1). By sliding (6) on the body (2), it is possible to present the catheter (1) to the manipulator who will grasp it in a sterile environment, without any contact with the outside. The advantage of this variant is that it overall reduces the number of parts necessary for the manufacture and packaging of the catheter, also reduces the costs of manufacturing the catheter and its packaging, while providing effective protection to the user. .

 As is clear from the above, the present invention provides an improvement over the prior art, because this new protective device makes it possible to eliminate the risks of accidental punctures and the dangers of contamination which result therefrom, incurred during implantation of a peripheral catheter.

 An extremely important advantage is that it does not in any way modify the existing puncture equipment, and that it can be manufactured independently, and contributed to reducing overall the cost of manufacturing the catheter with its packaging.

 The concept of the new product goes in the direction of improving the working conditions of the personnel who handle the puncture equipment, because this new device protects from the origin to the end of the use of the catheter the needle, and trivializes thus the protection of the catheter, which becomes a reflex of use for the manipulator. The present invention thus falls within the framework of integrated security, while seeking the most economical manufacturing costs.

Claims (8)

RKVEND I CAT IONS  1- Protective tip and automatic extraction of puncture needle for peripheral catheter, characterized in that it comprises:  - a hollow body (2) of length at least equal to that of the puncture needle (la) in which partially slides an extractor (3), one end (2a) of which is formed with a fixing system for the new catheter (1), and the other end of which is free for the passage of the gripping arms (3c) of the extractor (3),  - an extractor (3), intended to extract the used needle (la) using the gripping arms 13c), equipped with a connection system (4) with the body (2), with a guide ( 3a) handling and a locking device (3e) relative to the body (2).  2- automatic protection and extraction tip according to claim 1, characterized in that one end has an inner shape (2a) complementary to the outer shape (lb) of the catheter body (1), so as to allow an interlocking partial of the body (lb) of the new catheter (l) when it is engaged in the fixation system (2a).  3- automatic protection and extraction tip according to claim 1, characterized in that the body (2) has a guide system (2c, 2d) which can be straight or in the form of a bayonet, allowing the extractor (3 ) to be guided and wedged by means of the guide device 13a).  4- automatic protection and extraction tip according to claim 1, characterized in that the extractor (3) has gripping arms of the type flat plates (3c) or spikes (3i !, jaws (3f), vé gripping (3g) or clamping arm (3h), all flexible, can open when it protrudes clearly from the end of the body (2), closing by forming a hook on the needle (la) of the catheter , and re-entering with the needle (la) of the catheter entirely in the body (2), without being able to come out, thanks to the non-return devices type teeth (2e), clamping cone (2f) or lug (2h) placed on the body (2), which retain the non-return device type teeth (3e) placed on the extractor (3).  5- automatic protection and extraction tip according to claim 1, characterized in that the extractor (3) can be provided with an automatic withdrawal device (4), acting as a spring or elastic, itself even equipped with fixing means (3d) on the extractor and (2b) on the body (2)  6- automatic protection and extraction tip according to claim 1, characterized in that the body (2) can be provided with a ratchet device (2g) allowing, thanks to the automatic removal device (4), to make automatically retract the extractor (3! into the body (2)  7- Automatic protection and extraction tip according to claim 1, characterized in that the body (2) and the extractor (3) can be interconnected via the link (5) which can act as type automatic withdrawal device (4),  8- Automatic protection and extraction tip according to claim 1 and 8, characterized in that the body (2) can open lengthwise and close again via the clips (2h)