A port-of-care puncture positioning device

Abstract

This invention relates to the field of infusion devices, specifically a port-of-care puncture and positioning device. The device includes a positioning cylinder with a vertically penetrating clearance notch on its side wall. A conical sleeve composed of several positioning claws is connected to the bottom of the positioning cylinder. The smaller diameter end of the conical sleeve is connected to the positioning cylinder. The positioning claws are plastic and have gaps between them. A positioning ferrule is slidably connected to the outer wall of the positioning cylinder, which slides onto and engages the positioning claws. Multiple sets of limiting protrusions are arranged from top to bottom on the positioning claws on both sides, with the distance between two adjacent limiting protrusions being greater than the width of the positioning ferrule. This invention solves the problem of poor stability in existing port-of-care puncture and positioning devices.

Description

Technical Field

[0001] This invention relates to the field of infusion devices, and more specifically to a port-of-care puncture and positioning device. Background Technology

[0002] An infusion port, also known as an implantable drug delivery device or implantable intravenous infusion system, is a small medical device used for long-term or repeated intravenous infusion therapy. For example... Figure 1 As shown, it typically consists of an infusion port 1 and a catheter 11 connected to a blood vessel 4. The infusion port 1 is usually implanted under the skin 3, located in the arm or chest wall, while the catheter 11 extends to a central vein, allowing medication to be delivered directly into the circulatory system. Figure 2 As shown, the infusion port 1 includes a reservoir 12. The top of the reservoir 12 is sealed by a silicone or special rubber diaphragm 13 that can be repeatedly punctured thousands of times without being easily damaged. During infusion, a special butterfly-wing atraumatic needle 2 is inserted vertically into the center of the diaphragm 13 until the resistance is felt to disappear, which indicates that the needle has penetrated the diaphragm 13 and entered the infusion port 1. At this time, the prepared infusion bag or infusion bottle can be connected to the butterfly-wing atraumatic needle 2 through the infusion tube to start the infusion.

[0003] Combination Figure 3 As shown, currently in clinical practice, during puncture, medical staff need to first locate the infusion port 1, then use one hand to pinch the infusion port 1 from under the skin and keep it protruding from the skin surface 3, while the other hand performs the puncture. Because the infusion port is embedded under the skin, and due to the retraction of the fat layer after pinching, especially in obese patients with a thick fat layer, it is difficult for medical staff to pinch the infusion port 1 with one hand and keep it stably protruding from the skin surface. Therefore, the operation is difficult when performed by a single person. Clinically, multiple people usually work together to complete the puncture, but this method is labor-intensive and adds to the burden of the already heavy medical work.

[0004] To address the aforementioned issues, a port-a-cath puncture positioning device (Publication No. CN110507878B, Publication Date 2021.05.28) has been disclosed in the prior art. This device places a frustum-shaped positioning cylinder over the skin to be punctured. Pressing down on a pressure bar on the positioning cylinder causes it to be pressed down further. Utilizing the structural feature that the diameter of the end of the positioning cylinder in contact with the skin is larger than the diameter of the end furthest from the skin, the covered skin bulges upwards when pressed down, facilitating subsequent puncture. However, this device still has certain problems in practical application: By pressing the cylinder down on the skin, the skin covered by the cylinder is squeezed upwards and bulges. If a greater upward bulge is required, especially if the patient gains weight during the port-a-cath implantation process, resulting in increased fat layer, the cylinder needs to be pushed deeper into the skin, leading to severe pressure marks and even pressure injuries. Summary of the Invention

[0005] The present invention aims to provide a solution to the problem that existing port-of-care puncture positioning devices, which simply compress the skin by vertical downward pressure, can easily lead to severe skin indentations.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A positioning device for infusion port puncture includes a positioning cylinder with a vertical through-hole on its side wall. A conical sleeve consisting of several positioning claws is connected to the bottom of the positioning cylinder. The small-diameter end of the conical sleeve is connected to the positioning cylinder. The positioning claws are plastic and have gaps between them. A positioning hoops are slidably connected to the outer wall of the positioning cylinder. The positioning hoops are used to slide onto the positioning claws and hold them in place. Multiple sets of limiting protrusions are provided on the positioning claws on both sides from top to bottom. The distance between two adjacent limiting protrusions is greater than the width of the positioning hoops.

[0008] Preferably, as an improvement, the positioning cylinder is provided with a conduit connector avoidance area, and the positioning claw includes a long positioning claw and a short positioning claw, with the short positioning claw being located in the conduit connector avoidance area.

[0009] Preferably, as an improvement, the positioning cylinder is provided with a conduit connector avoidance area, and the conduit connector avoidance area is not provided with positioning claws.

[0010] Preferably, as an improvement, the positioning cylinder is provided with a conduit connector avoidance area, and the spacing between the positioning claws in the conduit connector avoidance area is greater than the spacing between the positioning claws in other areas of the positioning cylinder.

[0011] Preferably, as an improvement, a butterfly wing limiting ring is provided inside the positioning cylinder. The inner wall of the butterfly wing limiting ring is provided with a limiting groove for limiting the butterfly wing of the non-damaging needle. The butterfly wing limiting ring is also provided with a vertical clearance notch. The butterfly wing limiting ring is detachably connected to the positioning cylinder.

[0012] Preferably, as an improvement, the butterfly wing limiting ring is circumferentially fixed with at least three connecting ropes, the side wall of the positioning cylinder is provided with rope holes, the other end of the connecting rope passes through the rope holes, and the connecting rope is fixed to the positioning cylinder by the rope head fixed at the free end. The inner edge of the top of the positioning slip ring is provided with an annular cutting blade, which can contact the rope head.

[0013] Preferably, as an improvement, the bottom of the butterfly wing limiting ring is connected to a conical padding tube, the bottom center of the padding tube has a puncture hole, the connection between the padding tube and the butterfly wing limiting ring is provided with a first annular easy-tear line, and the sides of the padding tube are provided with a second vertical easy-tear line. The first easy-tear line can separate the padding tube and the butterfly wing limiting ring, and the second easy-tear line can divide the side wall of the padding tube into two pieces. An adhesive layer is provided on the outer wall of the padding tube, and release paper is covered on the adhesive layer.

[0014] Preferably, as an improvement, an adhesive layer is also provided on the inner wall of the pad cylinder, and release paper is also covered on the adhesive layer.

[0015] The principles and beneficial effects of this solution are as follows:

[0016] 1. In practical application, the conical sleeve is placed over the skin at the infusion port with the sleeve facing downwards. Utilizing the principle that the diameter of the bottom of the conical sleeve is larger than the diameter of the top, pressing down on the sleeve compresses the skin, causing the covered skin to bulge, thus making the infusion port bulge through the skin. Furthermore, by pressing the positioning slip ring down onto the positioning claws, the gap between the claws allows them to converge towards the center under the action of the slip ring. This grips the infusion port circumferentially through the skin, further enhancing its bulge. Compared to simply relying on the conical sleeve to compress the skin, this design combines the compression of the conical sleeve and the gripping force of the positioning claws for easier port placement, eliminating the need for excessive pressure perpendicular to the skin and effectively reducing indentations caused by vertical force. In addition, this solution uses a plastic positioning claw. When the positioning slip ring clamps the positioning claw, the plasticity of the positioning claw makes it tend to unfold and reset outward. This tendency makes the positioning claw and the positioning slip ring tightly abut against each other, thereby achieving a balance of forces, and ultimately enabling the positioning claw to stably grip the infusion port seat.

[0017] 2. This design incorporates multiple sets of limiting protrusions on the positioning claw from top to bottom. These protrusions act as limiting elements for the positioning slide, further enhancing the stability of the positioning claw. Because the positioning claw is plastic, applying greater pressure to the positioning slide forces it through the limiting protrusions. The multiple sets of protrusions allow for precise selection of the positioning slide's depth based on the patient's fat layer thickness, making it widely applicable. Patients with thicker fat layers require lower pressure on the positioning slide, resulting in greater claw retraction, more fat gripping, and greater gripping force, thus ensuring the stability of the infusion port. The increased resistance as the positioning slide passes through the limiting protrusions serves as a warning signal, helping the operator determine the correct depth of the positioning slide and facilitating operation. In summary, this design, with its limiting protrusions, positioning slide, and plastic positioning claw, achieves two functions: limiting the positioning claw's position and providing a warning signal to medical staff to determine the positioning slide's location.

[0018] 3. Because the infusion port is connected to a catheter, the catheter connector may obstruct the positioning claws. Specifically, the catheter connector may elevate the positioning claws subcutaneously, preventing them from descending to the same level as other positioning claws. This could cause the device to tilt, potentially affecting subsequent punctures. Therefore, this design incorporates a catheter connector avoidance zone to minimize obstruction of the catheter connector and address the aforementioned issue. For example, the avoidance zone may not include positioning claws to avoid the catheter connector, or short positioning claws may be used to prevent them from being elevated by the catheter connector, thus ensuring the overall levelness of the device.

[0019] 4. During actual puncture, medical personnel pinch the wings of the butterfly-shaped abrasive needle to perform the puncture. After releasing the needle, the wings unfold to a horizontal position due to their own plasticity, facilitating subsequent fixation to the skin. After the puncture is completed, this device needs to be removed for subsequent fixation of the butterfly-shaped abrasive needle. To prevent the butterfly-shaped abrasive needle from loosening due to pulling or touching during removal, this device incorporates a butterfly-shaped limiting ring inside the positioning cylinder. After the puncture is completed, the wings of the butterfly-shaped abrasive needle are pressed against the limiting groove of the limiting ring, confining it within the limiting sleeve. The limiting ring is then separated from the positioning cylinder before removing the positioning cylinder. This process secures the butterfly-shaped abrasive needle and effectively prevents collisions or pulling during removal of the positioning cylinder.

[0020] 5. In this solution, the connecting rope is threaded through the positioning cylinder, and the butterfly wing limiting ring is installed inside the positioning cylinder using the rope end as a limit. After piercing, when removing the positioning cylinder, the positioning slip ring must first be slid upwards to reset. As the positioning slip ring slides upwards, its cutting edge cuts the rope end, thus severing the connecting rope and separating the butterfly wing limiting ring from the positioning cylinder. This solution utilizes the necessary action of removing the positioning cylinder—sliding the positioning slip ring upwards—to cut the rope end and complete the separation of the butterfly wing limiting ring from the positioning cylinder, eliminating the need for an additional separation action and making the operation more convenient.

[0021] 6. This design connects to a padding tube below the butterfly-wing restraint ring. A puncture hole at the bottom of the padding tube serves as a guide during puncture. The padding tube features a specially designed first and second easy-tear lines. After the positioning cylinder is removed, tearing along the first easy-tear line separates the butterfly-wing restraint ring from the padding tube. Tearing along the second easy-tear line divides the tube wall in two. These two halves are then adhered to the skin via an adhesive layer, serving as padding between the skin and the butterfly wing, preventing direct contact between the butterfly wing and the skin and improving patient comfort. This design, with its padding tube and butterfly-wing restraint ring, ingeniously restrains the butterfly wing during puncture and transforms into butterfly-wing padding after puncture.

[0022] Based on this, since the butterfly-wing atraumatic needle has a certain length, after puncture in patients with thin fat layers, there is still a certain distance between the butterfly wing and the skin, which needs to be filled with gauze. Currently, the gauze is placed on the skin and then attached with medical tape, which is quite troublesome. This solution also sets an adhesive layer on the inner wall of the pad tube. After the pad tube deforms and is attached to the skin, the gauze can be directly attached to the adhesive layer on the inner wall of the pad tube, which is quick and convenient, and does not require additional medical tape or other tools. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of a subcutaneous infusion port.

[0024] Figure 2 This is a schematic diagram of the infusion port structure.

[0025] Figure 3 This is a schematic diagram of the procedure for port-a-cath insertion.

[0026] Figure 4 This is a schematic diagram of the structure of Embodiment 1 of the present invention.

[0027] Figure 5 This is a schematic diagram of the structure of Embodiment 2 of the present invention.

[0028] Figure 6 This is a partial cross-sectional view of Embodiment 5 of the present invention.

[0029] Figure 7 This is a partial cross-sectional view of Embodiment 6 of the present invention.

[0030] Figure 8 This is a schematic diagram of the structure of the pad cylinder in Embodiment 6 of the present invention.

[0031] Figure 9 This is a schematic diagram of the unfolded pad cylinder in Embodiment 6 of the present invention.

[0032] Figure 10 This is a schematic diagram of the positioning slip ring in Embodiment 8 of the present invention.

[0033] Figure 11 This is a schematic diagram of the positioning slip ring in Embodiment 9 of the present invention.

[0034] Figure 12 This is a partial structural diagram of the positioning slip ring in Embodiment 9 of the present invention. Detailed Implementation

[0035] The following detailed description illustrates the specific implementation method:

[0036] The reference numerals in the accompanying drawings include: infusion port 1, catheter 11, reservoir 12, diaphragm 13, butterfly-wing non-traumatic needle 2, skin 3, blood vessel 4, positioning cylinder 5, clearance notch 51, positioning claw 6, limiting protrusion 61, long positioning claw 62, short positioning claw 63, positioning slide ring 7, connecting plate 71, sliding pin 72, arc groove 73, butterfly-wing limiting ring 8, limiting groove 81, connecting rope 82, rope end 83, cutting blade 84, padding cylinder 9, puncture hole 91, first easy-tear line 92.

[0037] Example 1:

[0038] like Figure 4 As shown, an infusion port puncture positioning device includes a positioning cylinder 5, with a vertical through-hole 51 on the side wall of the positioning cylinder 5. The bottom of the positioning cylinder 5 is connected to a conical sleeve formed by several positioning claws 6, with gaps between the positioning claws 6. The small-diameter end of the conical sleeve is connected to the positioning cylinder 5. The positioning cylinder 5 and the positioning claws 6 are made of medical plastic and are integrally molded.

[0039] A positioning slide band 7 is slidably connected to the outer wall of the positioning cylinder 5. The positioning slide band 7 is also made of medical plastic. The positioning slide band 7 is used to slide onto the positioning claw 6 and hold the positioning claw 6. Multiple sets of limiting protrusions 61 are integrally formed from top to bottom on both sides of the positioning claw 6. In this embodiment, there are 2 sets. The limiting protrusions 61 on the same horizontal line constitute a set. In this embodiment, there are two limiting protrusions 61 in a set. The two limiting protrusions 61 in a set are symmetrically arranged on the left and right sides of the conical sleeve. The distance between two adjacent limiting protrusions 61 is greater than the width of the positioning slide band 7.

[0040] This embodiment uses an arm-shaped infusion port as an example to illustrate the working principle of this solution:

[0041] In practical application, first locate the infusion port. Place the positioning device, with the conical sleeve facing down, over the infusion port 1. The lower end of the positioning claw 6 should press firmly against the skin 3. Press the positioning device downwards. Because the diameter of the bottom of the conical sleeve is larger than the diameter of the top, the downward pressure of the conical sleeve compresses the skin 3, causing the covered skin 3 to bulge. This, in turn, causes the infusion port 1 to bulge through the skin 3. The positioning claw 6 has a certain thickness and hardness to ensure it does not flip outwards during the downward pressure. Then, press the positioning slide 7 down onto the positioning claw 6. Because there is a gap between the positioning claws 6, after the positioning slide 7 slides onto the positioning claw 6, the positioning claw 6 can retract inwards, thereby gripping the skin 3 around the infusion port 1 circumferentially, making it bulge better and be stably fixed. When the positioning slide 7 is pressed down to the limiting protrusion 61, greater force is required to allow the positioning slide 7 to pass through the limiting protrusion 61. After passing through, the positioning slide 7 is fixed on the positioning claw 6 by the upper and lower positioning protrusions, resulting in better stability. By squeezing and pressing the skin through both the conical sleeve and the positioning claw 6, the infusion port 1 can be positioned more stably. This method is especially suitable for obese patients.

[0042] In practical application, the positioning slide 7 can be pressed down to which set of limiting protrusions 61 based on the thickness of the patient's fat layer. The thicker the fat layer, the thicker the skin 3 needs to be grasped, and the greater the elasticity of the skin 3, the tighter the grip needs to be. Therefore, for patients with thicker fat layers, the positioning slide 7 needs to be pressed down further. Since the resistance is greater when passing through the limiting protrusions 61, more force is required. Medical staff can use this as a signal to determine which set of limiting protrusions 61 the positioning slide 7 has been pressed down to. In practical application, the number of limiting protrusions 61 can also be set as needed.

[0043] After the infusion port 1 is fixed, select a suitable butterfly-wing atraumatic needle 2. The width of the butterfly-wing needle 2 after unfolding should be smaller than the inner diameter of the positioning cylinder 5 to facilitate removal of the positioning cylinder 5 after puncture. During puncture, hold the butterfly-wing atraumatic needle 2 and insert it vertically into the infusion port 1. Stop puncture when you feel the resistance disappear. Successful blood aspiration indicates a successful puncture. After puncture, press down on the butterfly-wing atraumatic needle 2 with one hand and slide the positioning clamp 7 upwards and back to its original position with the other hand. The positioning claw 6 will unfold and return to its original position under its own plasticity, releasing the protruding skin 3. Then, insert the tubing of the butterfly-wing atraumatic needle 2 into the positioning clamp 7 through the clearance notch 51. At this point, the positioning device can be removed from the skin 3. During removal, keep pressing down on the butterfly-wing atraumatic needle 2. After removal, the butterfly-wing atraumatic needle 2 can be fixed to the skin 3. Since the inner diameter of the positioning cylinder 5 is smaller than the width of the butterfly wing undamaged needle 2 when the butterfly wing is unfolded, the butterfly wing undamaged needle 2 will not be touched during the removal process.

[0044] Example 2:

[0045] like Figure 5 As shown, the difference between this embodiment and Embodiment 1 is that the positioning cylinder 5 is divided into a catheter connector avoidance area, and the positioning claw 6 includes a long positioning claw 62 and a short positioning claw 63, with the short positioning claw 63 located in the catheter connector avoidance area. When using this embodiment, it is important to ensure that the area of ​​the short positioning claw 63 is located at the position of the catheter connector on the infusion port 1 (the catheter 11 of the infusion port 1 connects to the central vein along the arm vein, and the position of the catheter connector can be determined by medical personnel). The purpose of this arrangement is that, since the infusion port 1 is connected to the catheter 11, the connector portion of the catheter 11 may subcutaneously elevate the positioning claw 6, preventing it from descending to the same horizontal position as other positioning claws 6, which could cause the device to tilt and potentially affect subsequent punctures. In this embodiment, the short positioning claw 63 is located on the skin 3 at the catheter connector site, effectively preventing it from being elevated by the catheter connector, thus keeping the device as horizontal as possible.

[0046] Example 3:

[0047] The difference between this embodiment and Embodiment 1 is that the positioning cylinder 5 is divided into a conduit connector avoidance area, and the conduit connector avoidance area is not equipped with positioning claws 6. In actual use, the area without positioning claws 6 is aligned with the position of the conduit connector. In this embodiment, the positioning claws 6 are not set at the position of the conduit connector, which can directly avoid the influence of the conduit connector on the positioning claws 6, thereby making the device as horizontal as possible. Since the area of ​​the conduit connector is small, in actual use only a small part of the area is not equipped with positioning claws 6, which will not affect the overall balance of the device.

[0048] Example 4:

[0049] The difference between this embodiment and Embodiment 1 is that the positioning cylinder 5 is divided into a conduit connector avoidance zone. The spacing of the positioning claws 6 in the conduit connector avoidance zone is greater than the spacing of the positioning claws 6 in other areas of the positioning cylinder 5, and the spacing of the positioning claws 6 in the conduit connector avoidance zone is greater than the diameter of the conduit connector. In practical applications, the area with the larger spacing of the positioning claws 6 is aligned with the position of the conduit connector, and the spacing of the positioning claws 6 in that area is aligned with the conduit connector. This effectively avoids the conduit connector obstructing the positioning claws 6, allowing the device to remain as horizontal as possible.

[0050] Example 5:

[0051] Combination Figure 6As shown, the difference between this embodiment and Embodiment 1 is that a butterfly wing limiting ring 8 is provided inside the positioning cylinder 5. The butterfly wing limiting ring 8 is located at the bottom of the positioning cylinder 5. A limiting groove 81 for limiting the butterfly wing of the butterfly wing non-traumatic needle 2 is opened on the inner wall of the butterfly wing limiting ring 8. A vertical clearance notch 51 is also opened on the butterfly wing limiting ring 8. The butterfly wing limiting ring 8 is also made of medical plastic. The butterfly wing limiting ring 8 is detachably connected to the positioning cylinder 5. Specifically, at least three connecting ropes 82 are circumferentially glued to the butterfly wing limiting ring 8. In this embodiment, there are four connecting ropes 82. The four connecting ropes 82 are evenly distributed and are made of plastic strips. Four rope holes are correspondingly opened on the side wall of the positioning cylinder 5. The other ends of the four connecting ropes 82 pass through the four rope holes respectively. One end of the connecting rope 82 that passes out of the positioning cylinder 5 is glued to a rope head 83. The rope head 83 is a plastic head. The connecting rope 82 is fixed to the positioning cylinder 5 through the rope head 83. A ring-shaped cutting blade 84 is glued to the inner edge of the top of the positioning slip ring 7. The cutting blade 84 can contact the rope end 83 and cut the rope end 83. The length of the connecting rope 82 does not need to be too long; it is sufficient to leave a gap of 0.5-1 cm between the butterfly wing limiting ring 8 and the positioning cylinder 5. In this embodiment, the positioning slip ring 7 is initially located below the rope end 83.

[0052] During puncture, pinch the wing of the butterfly-wing non-traumatic needle 2 and puncture. After the puncture is complete, press the wing firmly into the limiting groove 81 on the butterfly-wing limiting ring 8 to temporarily fix the wing. Press down on the butterfly-wing non-traumatic needle 2 with one hand, and slide the positioning slip ring 7 with the other hand to release the positioning claw 6. When the positioning slip ring 7 slides upward, its top cutting edge 84 cuts the rope end 83, the connecting rope 82 breaks, and the butterfly-wing limiting ring 8 separates from the positioning cylinder 5. This avoids touching the butterfly-wing non-traumatic needle 2 when removing the positioning cylinder 5. Before removing the positioning cylinder 5, first pass the tube of the butterfly-wing non-traumatic needle 2 through the avoidance notch 51 into the positioning slip ring 7 to avoid the tube obstructing the positioning slip ring 7. After the positioning cylinder 5 is removed, remove the butterfly-wing limiting ring 8 from the butterfly-wing non-traumatic needle 2. The butterfly-wing non-traumatic needle 2 unfolds, fixing the butterfly-wing non-traumatic needle 2 to the skin 3. By fixing the butterfly wing portion when removing the positioning cylinder 5 using the butterfly wing limiting ring 8, not only can the butterfly wing non-damaging needle 2 be stabilized when removing the positioning cylinder 5, but this solution can also be applied to butterfly wing non-damaging needles 2 with a butterfly wing width greater than the inner diameter of the positioning cylinder 5. Even if the butterfly wing portion is pinched during puncture when using a butterfly wing non-damaging needle 2 with a butterfly wing width greater than the inner diameter of the positioning cylinder 5, it will not affect the puncture. After puncture, the butterfly wing portion is restricted by the butterfly wing limiting ring 8, which will not affect the removal of the positioning cylinder 5. It has a wide range of applications.

[0053] Example 6:

[0054] Combination Figure 7 , Figure 8 and Figure 9As shown, the difference between this embodiment and embodiment 5 is that a conical padding tube 9 is connected to the bottom of the butterfly wing limiting ring 8. The top of the padding tube 9 is glued to the butterfly wing limiting ring 8. A puncture hole 91 is opened in the center of the bottom of the padding tube 9. A first annular easy-tear line 92 is provided at the connection between the padding tube 9 and the butterfly wing limiting ring 8. A second vertical easy-tear line is provided on both sides of the padding tube 9. The padding tube 9 and the butterfly wing limiting ring 8 can be separated by the first easy-tear line 92. The side wall of the padding tube 9 can be divided into two pieces by the second easy-tear line. An adhesive layer is provided on the outer wall of the padding tube 9. Release paper is covered on the adhesive layer. The padding tube 9 can be made of plastic film, gauze, etc.

[0055] Based on Example 5, after the positioning cylinder 5 is removed, it can be torn along the first easy-tear line 92 to separate the butterfly wing limiting ring 8 and the padding cylinder 9. Then, it can be torn along the second easy-tear line to divide the cylinder wall of the padding cylinder 9 into two fan-shaped pieces. These two pieces are then attached to the patient's skin 3 with an adhesive layer. This padding can be placed under the butterfly wing when fixing the butterfly wing non-traumatic needle 2, avoiding direct contact between the butterfly wing and the patient's skin 3, thus providing greater comfort.

[0056] Example 7:

[0057] The difference between this embodiment and embodiment 6 is that an adhesive layer is also provided on the inner wall of the pad cylinder 9, and release paper is also covered on the adhesive layer.

[0058] Because the butterfly-wing atraumatic needle 2 has a certain length, after puncture in patients with thin fat layers, there is still a certain distance between the butterfly wing part and the skin 3, which needs to be filled with gauze. Currently, the gauze is placed on the skin 3 and then attached with medical tape, which is quite troublesome. In this solution, an adhesive layer is also set on the inner wall of the padding tube 9. After the padding tube 9 is deformed and attached to the skin 3, the gauze can be directly attached to the adhesive layer on the inner wall of the padding tube 9, which is quick and convenient, and does not require additional medical tape or other tools.

[0059] Example 8:

[0060] Combination Figure 10 As shown, the difference between this embodiment and Embodiment 1 is that the positioning slide 7 also has an avoidance notch 51, and the avoidance notch 51 on it is radially aligned with the avoidance notch 51 on the positioning cylinder 5. The positioning slide 7 is made of medical plastic with a certain thickness and hardness, which does not affect its overall rigidity and can meet the requirements of compressing the positioning claw 6. Moreover, the width of the avoidance notch 51 on the positioning slide 7 is smaller than the width of the positioning claw 6, so as to prevent the positioning claw 6 from passing through the avoidance notch 51 and the compression of the positioning claw 6 is not affected.

[0061] Example 9:

[0062] Combination Figure 11 and Figure 12As shown, the difference between this embodiment and embodiment 8 is that a connecting plate 71 is provided outside the clearance notch 51 on the positioning slide band 7. One end of the connecting plate 71 is rotatably connected to the positioning slide band 7 on one side of the clearance notch 51. An arc-shaped groove 73 is opened on the outer wall of the positioning slide band 7 on the other side of the clearance notch 51. The top of the arc-shaped groove 73 is sealed and the bottom is open. A sliding pin 72 is fixed to the other end of the connecting plate 71. The sliding pin 72 is slidably connected in the arc-shaped groove 73. The sliding pin 72 needs to be subjected to a certain external force to slide in the arc-shaped groove 73.

[0063] In this embodiment, during the puncture process, the connecting plate 71 is in a position Figure 11 The state shown is such that the positioning slide 7's clearance notch 51 is connected to the connecting plate 71, thereby improving the overall structural strength of the positioning slide 7. Because the top of the arc-shaped groove 73 is sealed, during the downward pressing of the positioning slide 7, the connecting plate 71 is pressed against the top of the arc-shaped groove 73 by the upward reaction force of the positioning claw 6, preventing the connecting plate 71 from falling out of the arc-shaped groove 73. When the positioning slide 7 is slid upward after puncture, because the butterfly-wing non-damaging needle 2 is manually pressed down, the guide tube on it can exert a downward reaction force on the connecting plate 71, causing the sliding pin 72 to slide along the arc-shaped groove 73. This causes the connecting plate 71 to rotate downward, opening the clearance notch 51, allowing the positioning cylinder to be directly removed without having to pass the guide tube through. In practical applications, in other embodiments, the connecting plate 71 can also be manually rotated downward to open the clearance notch 51.

[0064] The above descriptions are merely embodiments of the present invention, and common knowledge such as specific technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solutions of the present invention, and these should also be considered within the scope of protection of the present invention. These modifications and improvements will not affect the effectiveness of the implementation of the present invention or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A device for positioning and puncturing an infusion port, characterized in that: The system includes a positioning cylinder with a vertical through-hole notch on its side wall. A conical sleeve composed of several positioning claws connects to the bottom of the positioning cylinder. The smaller diameter end of the conical sleeve connects to the positioning cylinder. The positioning claws are plastic and have gaps between them. A positioning slidable ring is slidably connected to the outer wall of the positioning cylinder, used to slide onto and hold the positioning claws. Multiple sets of limiting protrusions are arranged from top to bottom on the positioning claws on both sides, with the distance between two adjacent limiting protrusions being greater than the width of the positioning slid. A butterfly wing limiting ring is installed inside the positioning cylinder. The inner wall of the butterfly wing limiting ring has a limiting groove for limiting the butterfly wing without damaging the needle. The butterfly wing limiting ring also has a vertical clearance notch. The butterfly wing limiting ring is detachably connected to the positioning cylinder. At least three connecting ropes are fixed circumferentially to the butterfly wing limiting ring. The side wall of the positioning cylinder has rope holes. The other end of the connecting rope passes through the rope holes. The connecting rope is fixed to the positioning cylinder by the rope head fixed at the free end. The inner edge of the top of the positioning slide hoop is provided with an annular cutting blade that can contact the rope head.

2. The infusion port puncture and positioning device according to claim 1, characterized in that: The positioning cylinder is provided with a conduit connector avoidance area, and the positioning claw includes a long positioning claw and a short positioning claw, with the short positioning claw located in the conduit connector avoidance area.

3. The infusion port puncture and positioning device according to claim 1, characterized in that: The positioning cylinder is provided with a guide tube connector avoidance area, and the guide tube connector avoidance area is not provided with positioning claws.

4. The infusion port puncture and positioning device according to claim 1, characterized in that: The positioning cylinder is provided with a conduit connector avoidance area, and the spacing between the positioning claws in the conduit connector avoidance area is greater than the spacing between the positioning claws in other areas of the positioning cylinder.

5. A port-of-care puncture and positioning device according to any one of claims 1-4, characterized in that: The bottom of the butterfly wing limiting ring is connected to a conical padding tube. A puncture hole is opened in the center of the bottom of the padding tube. A first annular easy-tear line is provided at the connection between the padding tube and the butterfly wing limiting ring. A second vertical easy-tear line is provided on both sides of the padding tube. The padding tube and the butterfly wing limiting ring can be separated by the first easy-tear line. The side wall of the padding tube can be divided into two pieces by the second easy-tear line. An adhesive layer is provided on the outer wall of the padding tube, and release paper is covered on the adhesive layer.

6. The infusion port puncture and positioning device according to claim 5, characterized in that: An adhesive layer is also provided on the inner wall of the padding cylinder, and release paper is also covered on the adhesive layer.

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