Puncture needle anti-dropping fixing sleeve

Abstract

The utility model discloses a puncture needle anti -drop fixing sleeve relates to medical instrument technical field, including retaining member, and fixed part has arc reinforcing strip and is fixed in the arc reinforcing strip both end part side wall's flat iron wire no.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, specifically to a puncture needle anti-dislodgement fixation sleeve. Background Technology

[0002] Hemodialysis is a treatment that uses an artificial device to replace kidney function, primarily used for patients with acute and chronic renal failure, drug poisoning, and other conditions. It involves drawing blood from the patient's body and passing it through a dialyzer that utilizes a semi-permeable membrane. The dialyzer's membrane facilitates the transport of toxins and water, removing excess water and toxins from the blood, correcting electrolyte and acid-base imbalances, and then returning the purified blood to the body to partially replace the diseased kidneys and achieve therapeutic goals.

[0003] During hemodialysis, nursing staff perform arteriovenous fistula punctures. We use adhesive tape to secure it in a U-shape, but the needle can slip due to sweating, tape not sticking, or accidental pulling on the tubing (e.g., unconscious tugging during sleep or friction from clothing). Sometimes, even after the needle slips out, the tape remains in its original position. Once the needle dislodges, a second puncture is required. This second puncture can easily lead to scarring of the vessel wall, potentially causing long-term fistula stenosis or occlusion (such as aneurysmal dilation); it can also cause acute blood loss (a single slippage can result in 50-100ml of bleeding) and may induce hypotension. Utility Model Content

[0004] The purpose of this invention is to provide a puncture needle anti-dislodgement fixation sleeve to solve the problems mentioned in the background art.

[0005] To solve the above technical problems, this utility model provides the following technical solution: a puncture needle anti-dislodgement fixing sleeve, including a fixing member, the fixing member having an arc-shaped reinforcing strip and two flat iron wires fixed to the side walls at both ends of the arc-shaped reinforcing strip, the arc-shaped reinforcing strip and the two flat iron wires forming a U-shaped deformable structure with the opening facing downward, the U-shaped deformable structure being used to clamp the tail of the puncture needle seat and the connection point of the tubing; The flat iron wire has a flat retaining plate fixedly connected to its bottom wall. The retaining plate extends laterally and then bends horizontally to extend along the longitudinal direction. A gap is left between the two retaining plates. The retaining plate is fixed to the side wall of the end away from the first flat wire, and the end of the second flat wire is connected to a binding plate. One of the binding plates has an adhesive on its outer wall, and the adhesive is adhered to the outer wall of the other binding plate.

[0006] In a further embodiment, when the two flat wires are pressed together, the distance between the two flat wires is reduced, thereby reducing the opening of the U-shaped deformable structure.

[0007] In a further embodiment, the sidewall of the flat wire one facing the flat wire two is a blocking sidewall, which is used to abut against the puncture needle handle.

[0008] In a further embodiment, an adhesive patch is fixedly provided on the bottom wall of the fixation patch, and the adhesive patch extends laterally along the bottom wall of the fixation patch to form an expanded structure. Both the fixation patch and the adhesive patch are U-shaped structures.

[0009] In a further embodiment, the outer wall of the flat iron wire is covered with a gasket.

[0010] Compared with the prior art, the beneficial effects of this utility model are: This utility model is a puncture needle anti-dislodgement fixing sleeve, which can conveniently fix the puncture needle without the need for adhesive tape to stick to the skin, avoiding the needle tip from falling off due to factors such as sweating or non-stickiness of adhesive tape; at the same time, it limits the needle seat handle to prevent the needle tip from being pulled out of the blood vessel cavity due to external force collision or pulling of the tubing. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the main structure of the puncture needle in an embodiment of the present utility model; Figure 2 This is a schematic diagram of the main structure of an embodiment of the present utility model; Figure 3 This is a partial structural diagram of the main structure of an embodiment of the present utility model; Figure 4 This is a schematic diagram of the partial structural deformation of the main structure in an embodiment of this utility model.

[0012] In the diagram: 1. Fixation plate; 2. Adhesive plate; 3. Gasket; 4. Restraint plate; 5. Flat wire one; 6. Arc-shaped reinforcing strip; 7. Flat wire two. Detailed Implementation

[0013] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0014] This embodiment provides a puncture needle anti-dislodgement fixation sleeve, such as... Figure 1 , Figure 2 and Figure 3As shown, the device includes a retaining element. The retaining element has an arc-shaped reinforcing strip 6 and flat iron wires 5 fixed to the sidewalls at both ends of the arc-shaped reinforcing strip 6. A flat retaining plate 1 is fixedly connected to the bottom wall of the flat iron wire 5. The retaining plate 1 extends laterally and then bends horizontally to extend along the longitudinal direction. A second flat iron wire 7 is fixed to the sidewall of the retaining plate 1 away from the first flat iron wire 5. A restraining plate 4 is connected to the end of the second flat iron wire 7. One restraining plate 4 has an adhesive backing on its outer wall, and the adhesive is bonded to the outer wall of the other restraining plate 4. This structure can surround the puncture site and retain the puncture needle to prevent it from dislodging.

[0015] Specifically, the puncture needle used clinically consists of a needle tip, a needle hub with a pinch handle, and an external thin flexible tube connected to the tail of the needle hub. During insertion, the medical staff holds the needle by the pinch handle and inserts it at a 30°-45° angle, ensuring the bevel of the needle tip is fully inside the blood vessel. After puncture, slow aspiration reveals dark red blood; subsequent injection of 0.9% sodium chloride solution without resistance confirms the needle tip's position. It is important to note that clinically, the preferred puncture site is usually at the radial artery-cephalic vein anastomosis in the forearm, approximately 3-5 cm above the joint, within the cephalic vein's course. This site has ample blood flow (200-500 ml / min), fewer complications, and a long service life (5-10 years).

[0016] After the injection, medical staff need to fix the position of the puncture needle, such as... Figure 1 As shown, the arc-shaped reinforcing strip 6 and two flat iron wires 5 form a U-shaped deformable structure with the opening facing downwards. A gap is left between the two retaining pieces 1. Medical personnel pinch the arc-shaped reinforcing strip 6, align the opening of the entire U-shaped deformable structure with the junction of the puncture needle hub and the tubing, and insert the puncture needle hub into the tubing junction from the opening, placing it in the upper part of the U-shaped deformable structure. This operation involves inserting the puncture needle hub into the U-shaped deformable structure from top to bottom, rather than lifting the needle hub. The U-shaped deformable structure is inserted from below the junction of the puncture needle hub and the tubing, preventing the needle hub from being lifted too high during fixation, which could cause the needle tip to puncture the intima, leading to vasospasm, bleeding, or thrombosis.

[0017] Here, the height of the flat iron wire 5 is set at 8-10mm. When the connection between the puncture needle hub and the tubing is placed in the upper part of the U-shaped deformable structure, the entire puncture needle will be in an inclined state, but not in a vertical state. This state is conducive to keeping the needle tip and the blood vessel lumen at an inclined angle, reducing the cutting force on the blood vessel wall and reducing the probability of intimal damage.

[0018] Then, medical staff placed their thumbs and index fingers on the two flat wires—one on each side of the other, facing away from each other—and followed the instructions as follows: Figure 4The forces applied in opposite directions, as indicated by arrows A and A1, compress the two flat wires 5 together. The two flat wires 5 bend and deform at the point of force application, reducing the distance between them and thus the opening of the U-shaped deformable structure. This allows the junction of the puncture needle hub and the tubing to be contained within the bottom wall of the arc-shaped reinforcing strip 6. Simultaneously, the sidewall of flat wire 5 facing flat wire 7 is designated as a blocking sidewall, such as... Figure 1 As shown, after the puncture needle is matched with the U-shaped deformable structure, the blocking sidewall is used to abut against the puncture needle handle to prevent the puncture needle from sliding out of the U-shaped deformable structure with the narrowed opening.

[0019] Finally, the medical staff will bend the two flat iron wires 27 against the skin to form an arc structure, and wrap the two restraint pieces 4 around the skin at the puncture site. Depending on the thickness of the puncture site, the adhesive on the outer wall of one restraint piece 4 will be attached to the outer wall of the other restraint piece 4. After attachment, the skin should be kept free from pressure. At this point, the fixation work after the puncture needle is inserted is completed.

[0020] At the same time, such as Figure 2 As shown, an adhesive patch 2 is fixedly provided on the bottom wall of the retaining plate 1. The adhesive patch 2 extends laterally along the bottom wall of the retaining plate 1 to form an expanded structure. Both the retaining plate 1 and the adhesive patch 2 are U-shaped structures. Figure 2 It can be clearly seen that the width of patch 2 is significantly wider than that of fixation patch 1. Here, patch 2 is made of medical-grade silicone (platinum silicone), which is not easy to slip when in contact with the skin. Medical-grade silicone is soft and skin-friendly, with moderate elasticity, and is close to human skin, so it can better fit the skin. There is basically no relative slippage between the silicone material and the skin, but rather adhesion. This characteristic allows the silicone to maintain good stability after contact with the skin and is not easy to slip. It can minimize the risk of the tube being pulled by external force, causing the overall structure to slip and the puncture needle to slip off.

[0021] In summary, the above structure secures the puncture needle without the need for adhesive tape to adhere to the skin, avoiding needle detachment due to sweating or the tape not sticking. Simultaneously, it limits the position of the needle hub handle, preventing the needle from being pulled out of the blood vessel due to external force or impact pulling the tubing.

[0022] It should be added that both flat iron wire 1 (5) and flat iron wire 2 (7) are made of annealed iron wire. Through a high-temperature annealing process, the internal structure is relaxed, work hardening is eliminated, and flexibility is significantly improved. They are easy to bend and not easily broken, making them suitable for scenarios requiring repeated shaping. Using these iron wires facilitates easy bending operations for medical personnel in clinical settings.

[0023] Here, the retaining plate 1 extends laterally and then bends horizontally to extend along the longitudinal direction, as shown. Figure 1As shown, the two fixation pieces 1 form a U-shaped structure when viewed from above, except that they are disconnected at the two flat wires at position 5, so that the two fixation pieces 1 are located on both sides of the puncture needle. The purpose of this design is to deviate the fixation pieces 1 from the needle insertion position, so as to avoid the fixation pieces 1 being too close to the needle insertion position, and to avoid compressing the fistula and affecting the blood flow of the fistula.

[0024] In addition, to prevent the narrow flat wire 27 from causing pain when bent and contacting the patient's skin, a gasket 3 is wrapped around the outer wall of the flat wire 27. Figure 2 As shown, the pad 3 has a sponge embedded inside, which is wrapped around the flat wire 2 7. Medical staff bend the flat wire 2 7 according to the thickness of the puncture site. The pad 3 bends synchronously with the bend of the flat wire 2 7 and is applied to the epidermis of the puncture site, separating the skin from the flat wire 2 7 and improving comfort. Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A puncture needle anti-dislodgement fixing sleeve, characterized in that, include: The retaining member has an arc-shaped reinforcing strip (6) and two flat iron wires (5) fixed to the side walls at both ends of the arc-shaped reinforcing strip (6). The arc-shaped reinforcing strip (6) and the two flat iron wires (5) form a U-shaped deformable structure with the opening facing downward. The U-shaped deformable structure is used to clamp the tail of the puncture needle seat and the connection of the tubing. The flat iron wire (5) has a flat structure retaining plate (1) fixedly connected to its bottom wall. The retaining plate (1) extends laterally and then bends horizontally to extend along the longitudinal direction. There is a gap between the two retaining plates (1). The retaining plate (1) is fixed with a flat wire two (7) on the side wall away from the flat wire one (5). The end of the flat wire two (7) is connected to a binding plate (4). One of the binding plates (4) has an adhesive on its outer wall and the adhesive is bonded to the outer wall of the other binding plate (4).

2. The puncture needle anti-dislodgement fixing sleeve according to claim 1, characterized in that, When the two flat iron wires (5) are squeezed together, the distance between the two flat iron wires (5) is reduced, thereby reducing the opening of the U-shaped deformable structure.

3. The puncture needle anti-dislodgement fixing sleeve according to claim 1, characterized in that, The side wall of the flat wire one (5) facing the flat wire two (7) is a blocking side wall, which is used to abut against the puncture needle handle.

4. The puncture needle anti-dislodgement fixing sleeve according to claim 1, characterized in that, The bottom wall of the fixation piece (1) is fixed with an adhesive patch (2), which extends laterally along the bottom wall of the fixation piece (1) to form an expanded structure. Both the fixation piece (1) and the adhesive patch (2) are U-shaped structures.

5. The puncture needle anti-dislodgement fixing sleeve according to claim 3, characterized in that, The outer wall of the flat iron wire 2 (7) is covered with a gasket (3).

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