A catheter needle with marking function

Abstract

The application discloses a detaining needle with a marking function, and belongs to the technical field of medical supplies, which is used for providing a more convenient-to-use detaining needle with a marking function, comprising a piercing part and a main body part, wherein the main body part is provided with an extension hose, one end of the extension hose is provided with a catheter assembly, and the other end is provided with an infusion tee joint; the catheter assembly comprises a guide connecting seat connected with the extension hose, one end of the guide connecting seat is provided with a sleeve, the outer side surface of the sleeve is provided with an outer positioning ring; the piercing part comprises a needle seat, one end of the needle seat is fixedly connected with a steel needle, the outer side surface of the steel needle is provided with an inner marking line; the infusion tee joint comprises a conical connector connected with the extension hose, and the outer side surface of the conical connector is provided with a marking area. According to the application, the marking area is arranged on the outer side of the large-size conical connector, and the time is recorded in the form of laser marking instead of handwriting, so that the paper label is omitted, the label is not easy to fall off and lose, handwriting is not needed, and it is more convenient to mark and check information.

Description

Technical Field

[0001] This application relates to the field of medical supplies technology, and in particular to an indwelling needle with a marking function. Background Technology

[0002] The use of indwelling needles can reduce the pain and fear of injections caused by repeated venous punctures in children, alleviate the anxiety of parents, facilitate clinical medication administration, and facilitate the emergency medication administration of critically ill patients. It can also reduce the workload of nurses and reduce the pain of children. Therefore, indwelling needles are widely used in clinical practice. When dealing with children, a special group, the length of time the indwelling needle is in place and the comfort of the children are the most important issues for nurses and parents.

[0003] In practice, there are no special requirements for the puncture depth of the indwelling needle cannula. It is generally chosen by the medical staff based on their experience. Although the foreign body rod produced by the soft cannula under the skin is not large, if it is inserted too deeply, the probability of the cannula contacting the blood vessel is greater, and the foreign body sensation is more obvious. If it is inserted too shallowly, the end of the cannula located in the vein is prone to sticking up and putting pressure on the blood vessel wall, which is also uncomfortable. Therefore, the discomfort caused by the indwelling needle cannula inserted into the skin cannot be well controlled every time.

[0004] Another problem is that indwelling needles cannot be used indefinitely; they need to be removed or replaced after a certain period of use. The current method is to hang or stick a label on the indwelling needle to determine the duration of use. However, the label is not only prone to rubbing against the patient's skin, causing more discomfort, but it is also easy to fall off, making it difficult for medical staff to determine whether to remove the indwelling needle. Utility Model Content

[0005] The purpose of this application is to provide an indwelling needle with a marking function that is easier to use.

[0006] To achieve the above objectives, this application provides an indwelling needle with marking function: comprising a puncture part and a main body, the main body having an extension tube, one end of which is provided with a catheter assembly and the other end with an infusion tee, the catheter assembly including a guide connector connected to the extension tube, one end of which has a sleeve, the outer surface of which has an outer positioning ring, the puncture part including a needle seat, one end of which is fixedly connected to a steel needle, the needle seat being adapted to be inserted into the guide connector, the steel needle being adapted to pass through the sleeve and the end of the steel needle extending outside the sleeve, the outer surface of which has an inner marking line, the extension tube being fitted with a sealing clamp between the catheter assembly and the infusion tee, the infusion tee including a conical connector connected to the extension tube, the outer surface of which has a marking area, the conical connector also having a forward injection end and an oblique injection end, the end of which is connected to a heparin cap, and the end of which is connected to an antibacterial cap, ensuring the safety and hygiene of the indwelling needle in the idle state.

[0007] As a preferred embodiment, the outer positioning ring is coaxial with the cannula, and the inner marking line is coaxial with the steel needle, which can help determine whether the puncture part and the catheter assembly are properly fitted.

[0008] As a preferred embodiment, the width of the outer positioning ring along the axial direction is greater than the width of the inner marking line along the axial direction. The outer positioning ring is used to define a comfortable insertion depth range for the cannula, and the inner marking line can be used to reflect whether the puncture part is properly inserted into the cannula assembly with the help of the outer positioning ring 212.

[0009] As a preferred embodiment, the outer positioning ring has a width of 2mm along the axial direction, and the inner marking line has a width of 0.25mm along the axial direction, which is neither too thick to affect the judgment accuracy, nor too thin to be easily seen.

[0010] As a preferred embodiment, the lower edge of the outer positioning ring is closer to the guide connector. The distance between the lower edge of the outer positioning ring and the guide connector is 5mm. This distance will prevent the end of the guide connector from getting too close to the skin puncture site, which would cause the tail end of the cannula to bend significantly, and will also prevent the cannula from tilting up at the head due to shallow insertion.

[0011] As a preferred embodiment, when the needle hub and the guide connector are inserted into place, the inner marking line is located between the upper and lower edges of the outer positioning ring. Within this range, it indicates that the puncture part has been properly fitted during assembly.

[0012] As a preferred embodiment, the guide connector has a clearance slot that extends through the inner and outer walls, and the side of the needle holder has a needle-holding handle that is suitable for engaging with the clearance slot to form a sliding pair. This can prevent the steel needle from rotating during puncture and reduce the probability of the sharp end of the steel needle causing damage to the inner wall of the blood vessel.

[0013] As a preferred option, the marking area is planar, suitable for laser marking, which will not fall off, will not increase the scraping or obstruction of the indwelling needle, and will not require handwriting, with clear and easy-to-observe characters.

[0014] As a preferred embodiment, the sealing clamp includes a bridging plate, one end of which is connected to a lower pressure plate via a first side plate. The lower pressure plate has a flow-stopping block on its surface facing the bridging plate, which is suitable for pressing the extension hose onto the bridging plate. The other end of the bridging plate is connected to a locking block via a second side plate, which is suitable for restricting the movable end of the lower pressure plate and maintaining the flow-stopping block pressing the extension hose.

[0015] As a preferred embodiment, the first side plate and the second side plate have through holes that penetrate the inner and outer surfaces for the extension hose to pass through. The outer surfaces of the first side plate and the second side plate are each provided with a groove that connects to the through hole. The extension hose slides into the through hole through the groove, which effectively reduces the probability of the sealing clamp falling off or being lost.

[0016] Compared with the prior art, the beneficial effects of this application are as follows:

[0017] (1) By setting an external positioning ring outside the cannula, it is convenient for medical staff to determine the most suitable insertion depth of the cannula. By setting an internal marking line structure outside the steel needle, it is convenient for assembly personnel or assembly machines to determine whether the puncture part and the catheter assembly are properly matched.

[0018] (2) By opening a marking area on the outside of the larger conical joint, the time is recorded by laser marking instead of handwritten labels. The time marking is clear, no paper labels are needed, it is not easy to fall off or be lost, and it will not increase the scratching or obstruction of the indwelling needle. No handwriting is required, making it more convenient to mark or view information. Attached Figure Description

[0019] Figure 1 This is a three-dimensional schematic diagram of the overall structure of the indwelling needle with marking function.

[0020] Figure 2 This is a first three-dimensional structural diagram of the main body of the indwelling needle with marking function.

[0021] Figure 3 This is a second three-dimensional structural diagram of the main body of the indwelling needle with marking function.

[0022] Figure 4 This is a three-dimensional structural diagram of the puncture site of the indwelling needle with marking function.

[0023] Figure 5 This is a three-dimensional structural diagram of the sealing clamp for the indwelling needle with marking function.

[0024] In the diagram: 1. Puncture section; 101. Steel needle; 102. Inner marking line; 103. Needle hub; 104. Needle holder; 2. Main body; 210. Catheter assembly; 211. Cannula; 212. Outer positioning ring; 213. Guide connector; 214. Displacement slot; 220. Extension tubing; 230. Infusion tee; 231. Conical connector; 232. Marking area; 233. Forward injection end; 234. Oblique injection end; 3. Heparin cap; 4. Antibacterial end cap; 5. Sealing clamp; 501. Bridging support plate; 502. Lower pressure plate; 503. First side plate; 504. Second side plate; 505. Flow stop block; 506. Slide groove; 507. Through-hole; 508. Locking block. Detailed Implementation

[0025] The present application will be further described below with reference to specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0026] In the description of this application, it should be noted that the directional terms such as "center", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", and "counterclockwise" indicate the orientation and positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. They should not be construed as limiting the specific protection scope of this application.

[0027] It should be noted that the terms "first," "second," etc., in the specification and claims of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0028] The terms “comprising” and “having”, and any variations thereof, in the specification and claims of this application are intended to cover non-exclusive inclusion, for example, a process, method, system, product, or device that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or device.

[0029] like Figure 1-5 The indwelling needle with marking function shown includes a puncture section 1 and a main body 2 that can cooperate with each other. The main body 2 has an extension tube 220, and a catheter assembly 210 is provided at one end of the extension tube 220. The catheter assembly 210, the extension tube 220, and the infusion tee 230 are integrated into one structure and are all made of transparent material. In order to facilitate the identification of the direction of the indwelling needle during use, the infusion tee 230 is usually made of a semi-transparent material with extension. The catheter assembly 210 includes a part connected to the extension tube 220. The guide connector 213 has a soft sleeve 211 at one end. The sleeve 211 is very thin, like a needle. The sleeve 211 is connected to the extension hose 220 through the guide connector 213. The outer side of the sleeve 211 has an outer positioning ring 212. The outer positioning ring 212 is coaxial with the sleeve 211 and is coated with transparent pigment. The pigment needs to have a relatively high adsorption strength and cannot detach from the surface of the sleeve 211. The pigment used to coat the outer positioning ring 212 cannot be black, but a light light color.

[0030] The puncture unit 1 includes a needle hub 103, which is inserted into a guide connector 213. The two are typically interference-fitted to maintain the stability of the needle hub 103 insertion. The guide connector 213 has a clearance slot 214 that extends through the inner and outer walls. The side of the needle hub 103 has a needle holder 104, which engages with the clearance slot 214 to form a sliding pair. A steel needle 101 is fixedly connected to one end of the needle hub 103, making it the main component for skin and vein puncture. The steel needle 101 needs to pass through the sheath. The end of the tube 211 and the steel needle 101 extends outside the tube 211, so that the steel needle 101 located inside the tube 211 can maintain the straightness of the tube 211, and the end of the steel needle 101 can make contact with the skin first to achieve puncture. The outer surface of the steel needle 101 has an inner marking line 102, which is also formed by coating with a pigment that is not easy to detach. The inner marking line 102 is also coaxial with the steel needle 101, but the transparency of the pigment does not need to be specified, and black is usually used directly.

[0031] It should be noted that the width of the outer positioning ring 212 along the axial direction is greater than the width of the inner marking line 102 along the axial direction. Specifically, the width of the outer positioning ring 212 along the axial direction is 2mm, and the width of the inner marking line 102 along the axial direction is 0.25mm. The inner marking line 102 is neither too thick to affect positioning accuracy, nor too thin to be clearly seen. The end of the outer positioning ring 212 closer to the guide connecting seat 213 is the lower edge, and naturally, the distance between the outer positioning ring 212 and the guide connecting seat 213 is... 3. The far end is the upper edge. The end of the guide connector 213 that is close to the outer positioning ring 212 is its upper end. The distance between the lower edge of the outer positioning ring 212 and the upper end of the guide connector 213 is 5mm. This is the minimum reserved distance for the cannula 211 not to be inserted below the skin. When the needle seat 103 and the guide connector 213 are inserted into place, the inner marking line 102 is located between the upper and lower edges of the outer positioning ring 212. This makes it easy to determine whether the puncture part 1 is inserted into place when it is assembled with the main body part 2.

[0032] The other end of the extension tubing 220 is provided with a translucent infusion tee 230. The infusion tee 230 includes a conical connector 231 connected to the extension tubing 220. The outer side of the conical connector 231 has a marking area 232. The outer side of the conical connector 231 is flat, but the marking area 232 is flat. Laser marking can be performed in the marking area 232. The marked information is the date when the indwelling needle was first used, which can be specified to the hour and minute of that day. The conical connector 231 also has a forward injection end 233 and an oblique injection end 234. The forward injection end 233 and the oblique injection end 234 are connected to the extension tubing 220 through the hollow chamber of the conical connector 231. The end of the forward injection end 233 is connected to a heparin cap 3, and the end of the oblique injection end 234 is connected to an antibacterial end cap 4. The specific structure and function of the heparin cap 3 and the antibacterial end cap 4 are prior art and are not part of the design points of this application, so they will not be described in detail here.

[0033] An extension hose 220 is fitted with a sealing clamp 5 between the catheter assembly 210 and the infusion tee 230. The sealing clamp 5 includes a straight bridging plate 501. One end of the bridging plate 501 is connected to a lower pressure plate 502 via a first side plate 503. The lower pressure plate 502 has a flow-stopping block 505 on its surface facing the bridging plate 501, which can press the extension hose 220 onto the bridging plate 501, thereby preventing the liquid in the extension hose 220 from continuing to flow. The other end of the bridging plate 501 is connected to a locking block 508 via a second side plate 504, which is used to restrict the movable end of the lower pressure plate 502. The upper end of the locking block 508 is inclined, and the lower end is flat. When the lower pressure plate 502 is pressed, the movable end can easily slide along the inclined surface into the lower end of the locking block 508. The first side plate 503 and the second side plate 504 have through holes 507 that penetrate the inner and outer surfaces, allowing the extension hose 220 to pass through. The outer surfaces of the first side plate 503 and the second side plate 504 are provided with grooves 506 that connect to the through holes 507. The extension hose 220 slides into the through holes 507 through the grooves 506. Since the diameter of the extension hose 220 is much larger than the grooves 506 when it is not compressed, it is not easy for the extension hose 220 to come out of the through holes 507 under non-human conditions after it slides into the through holes 507. Therefore, the structure of the grooves 506 that connect to the through holes 507 takes into account both the installation stability of the sealing clamp 5 and the ease of disassembly and assembly.

[0034] Working principle: When using the indwelling needle, first remove the plastic packaging bag and take out the needle. Use a laser marking machine to mark the current time on the marking area 232 of the conical connector 231. After marking the time, remove the antibacterial cap 4 and connect it to the infusion tubing, and perform air venting. Then, use a tourniquet to tie the patient's vein, making the vein at the puncture site bulge. Next, remove the protective sheaths from the cannula 211 and the steel needle 101, allowing the tip of the steel needle 101 to penetrate the skin and enter the vein. The soft cannula 211 will pierce the skin along with the steel needle 101 until... The skin tissue surrounding the cannula 211 is located between the upper and lower edges of the outer positioning ring 212. At this point, the cannula 211 is inserted into place. With one hand, press the guide connector 213 firmly onto the skin, and with the other hand, pinch the needle holder 104 to pull the needle hub 103 and the steel needle 101 out of the catheter assembly 210. Finally, use a medical transparent dressing to fix the guide connector 213 onto the skin and then release. Since the time marked on the indwelling needle is not easy to fall off or erase, it can remain stably for a long time, making it convenient for medical staff to judge the usage time of the indwelling needle and thus decide whether to remove or leave the indwelling needle.

[0035] The basic principles, main features, and advantages of this application have been described above. Those skilled in the art should understand that this application is not limited to the above embodiments. The embodiments and descriptions in the specification are merely the principles of this application. Various changes and modifications can be made to this application without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection claimed by this application is defined by the appended claims and their equivalents.

Claims

1. An indwelling needle with marking function, characterized in that: The device includes a puncture section (1) and a main body (2). The main body (2) has an extension tube (220). One end of the extension tube (220) is provided with a catheter assembly (210), and the other end is provided with an infusion tee (230). The catheter assembly (210) includes a guide connector (213) connected to the extension tube (220). One end of the guide connector (213) has a sleeve (211), and the outer surface of the sleeve (211) has an outer positioning ring (212). The puncture section (1) includes a needle seat (103). One end of the needle seat (103) is fixedly connected to a steel needle (101). The needle seat (103) is adapted to be inserted into the guide connector (213), and the steel needle (101) is adapted to pass through the sleeve (211). 211) The end of the steel needle (101) extends outside the cannula (211), the outer side of the steel needle (101) has an inner marking line (102), the extension tubing (220) is fitted with a sealing clamp (5) between the catheter assembly (210) and the infusion tee (230), the infusion tee (230) includes a conical connector (231) connected to the extension tubing (220), the outer side of the conical connector (231) has a marking area (232), the conical connector (231) also has a forward injection end (233) and an oblique injection end (234), the end of the forward injection end (233) is connected to a heparin cap (3), and the end of the oblique injection end (234) is connected to an antibacterial end cap (4).

2. The indwelling needle with marking function as described in claim 1, characterized in that: The outer positioning ring (212) is coaxial with the sleeve (211), and the inner marking line (102) is coaxial with the steel needle (101).

3. The indwelling needle with marking function as described in claim 2, characterized in that: The width of the outer positioning ring (212) along the axial direction is greater than the width of the inner marking line (102) along the axial direction.

4. The indwelling needle with marking function as described in claim 3, characterized in that: The outer positioning ring (212) has a width of 2 mm along the axial direction, and the inner marking line (102) has a width of 0.25 mm along the axial direction.

5. The indwelling needle with marking function as described in claim 4, characterized in that: The lower edge of the outer positioning ring (212) is closer to the guide connecting seat (213), and the distance between the lower edge of the outer positioning ring (212) and the guide connecting seat (213) is 5mm.

6. The indwelling needle with marking function as described in claim 5, characterized in that: When the needle seat (103) is inserted into the guide connector (213), the inner marking line (102) is located between the upper and lower edges of the outer positioning ring (212).

7. The indwelling needle with marking function as described in claim 6, characterized in that: The guide connector (213) has a relief slot (214) that runs through the inner and outer walls. The side of the needle holder (103) has a needle holding handle (104) that is suitable for engaging with the relief slot (214) to form a sliding pair.

8. The indwelling needle with marking function as described in any one of claims 1 to 6, characterized in that: The marking area (232) is a plane, and the marking area (232) is suitable for laser marking.

9. The indwelling needle with marking function as described in any one of claims 1 to 6, characterized in that: The sealing clamp (5) includes a bridging plate (501). One end of the bridging plate (501) is connected to a lower pressure plate (502) via a first side plate (503). The surface of the lower pressure plate (502) facing the bridging plate (501) has a flow-stopping block (505), which is suitable for pressing the extension hose (220) onto the bridging plate (501). The other end of the bridging plate (501) is connected to a locking block (508) via a second side plate (504), which is suitable for restricting the movable end of the lower pressure plate (502).

10. The indwelling needle with marking function as described in claim 9, characterized in that: The first side plate (503) and the second side plate (504) are provided with through holes (507) that penetrate the inner and outer surfaces for the extension hose (220) to pass through. The outer surfaces of the first side plate (503) and the second side plate (504) are provided with grooves (506) that communicate with the through holes (507). The extension hose (220) slides into the through holes (507) through the grooves (506).

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