Multifunctional injection seat auxiliary device

Abstract

The application discloses a multifunctional injection seat auxiliary device, which comprises a base, a measuring hole is formed in the base, when the base is pressed towards the skin and an injection seat is inserted into the measuring hole, a gap exists between the outer periphery of the injection seat and the hole wall of the measuring hole, a support is connected to the base, an injection needle group is installed on the support, the injection needle group is directed towards the measuring hole, a positioning member and a scale member are further included, during the process that the base is pressed towards the skin and the injection seat is inserted into the measuring hole, the injection seat is located on the movement path of the positioning member, the positioning member and the base have a distance change in the pressing direction of the base, the scale member is used for reflecting the distance change value, the device can accurately position the injection seat, measures and displays the implantation depth of the injection seat, and is not prone to slipping, meanwhile, the device has the functions of non-injury needle fixing and puncture fixing, and has high operation stability and safety, in addition, the device is small in size, simple in structure and easy to operate, and is suitable for injection seats of various sizes.

Description

Technical Field

[0001] The present invention belongs to the technical field of medical devices, and in particular relates to a multifunctional injection seat auxiliary device. Background Art

[0002] With the increasing multifunctionality of active implantable devices, many now also offer long-term drug delivery capabilities. For example, cochlear implants often feature a subcutaneous injection site and a drug reservoir. An external injection system connects to the site through the skin and replenishes the reservoir with medication, which is then actively or passively released to the target area to achieve a therapeutic effect.

[0003] However, the injection seat in this type of system can only perform the function of connecting the body and the outside world. Due to its small size, it is generally difficult to locate. The intravenous infusion port is a typical implantable drug delivery device with an injection seat. The drug delivery end of the catheter is placed in the target area through percutaneous puncture during surgery. The remaining catheter and injection seat are buried in the subcutaneous tissue and sutured to fix. Only a round protrusion can be felt on the patient's body surface. During treatment, the position is positioned from this point. A non-destructive needle is vertically punctured through the septum through the skin and into the fluid reservoir of the injection seat. The drug solution is accurately delivered to the target area where the catheter drug delivery end is located through the catheter. Clinically, during the needle insertion process, medical staff often need to use the thumb, index finger and middle finger of the non-dominant hand to simultaneously feel the position outline of the injection seat and pinch it to fix it. Then, they need to further feel the thickness of the skin tissue directly above to select a safety needle of appropriate length. The central part of the skin protrusion is selected, and the main hand holds the safety needle and vertically inserts it from the center of the three fingers, through the septum, and directly to the bottom of the injection seat. Since the injection seat is buried under the skin, it often slips during positioning operations. Moreover, since the operator holds the puncture tip in his other hand, the overall puncture operation is more troublesome and often slips, resulting in puncture failure. In addition, excessive pressure on the injection seat or positioning and pinching can also cause damage to the seat body and epithelial tissue. During the needle removal process, since the safety needle is perpendicular to the injection seat, the needle is inserted deeper and the needle is tightly combined with the base. A greater force is required to remove the needle, and the force and smoothness of the removal are difficult to control.

[0004] At present, with the development of technology, people are gradually optimizing the design of the implant device itself. For example, patent application No. 202210999263.2 discloses a magnetic fully implantable intravenous infusion port, including a magnetic port body device and a magnetic positioning device. The simulated insertion operation shows that the device has a one-time puncture success rate of up to 100%. However, the introduction of the magnetic device will make it impossible for patients to undergo magnetic resonance imaging, and magnetic resonance examinations are often very necessary for cancer patients. Patent application No. 202211280530.7 discloses an implantable intravenous drug delivery device and an implantable intravenous drug delivery system. The infusion port has a circuit board, an electromagnetic induction coil and a near-infrared LED lamp. The implanted near-infrared LED lamp can facilitate imaging through existing infrared imaging technology to achieve the positioning of multiple light sources, thereby providing medical staff with intuitive puncture guidance. However, this system is relatively complex, expensive and also has the problem of interference with magnetic resonance examinations. At present, there are also technical solutions for designing and optimizing non-destructive needles. Patent application number 202210948927.2 discloses a safe, non-invasive infusion port needle, comprising a syringe, a needle body, and a safety base. Patent application number 201910914454.2 discloses a self-locking safety needle for an infusion port. The optimized non-invasive needle has both puncture positioning and protection functions. However, since injection needles are Class III medical devices, the biosafety requirements of the improved non-invasive needle structure need to be improved.

[0005] In summary, the current traditional injection seat auxiliary device still has problems such as poor positioning accuracy, poor operational stability, and low safety during infusion, and the existing injection seat auxiliary device cannot improve the above problems at the same time. Summary of the Invention

[0006] To solve the above problems, the present invention provides the following technical solutions: a multifunctional injection seat auxiliary device, comprising a base, the base having a measuring hole formed therein, wherein when the base is pressed toward the skin and the injection seat is inserted into the measuring hole, a gap exists between the outer periphery of the injection seat and the wall of the measuring hole; a bracket is connected to the base, and an injection needle assembly is mounted on the bracket, with the injection needle assembly facing the measuring hole;

[0007] It also includes a positioning member and a scale member. When the base is pressed toward the skin and the injection seat is extended into the measuring hole, the injection seat is located on the movement path of the positioning member; and in the pressing direction of the base, the distance between the positioning member and the base changes; the scale member is used to reflect the distance change value.

[0008] Preferably, a sliding channel is provided in the bracket, and the positioning member is located in the sliding channel and is slidably connected to the sliding channel.

[0009] Preferably, the injection needle group includes a first syringe, a second syringe slidably connected to the first syringe, and a non-damageable needle passing through the first syringe and the second syringe, one end of the first syringe faces the measuring hole and is fixedly connected to the positioning member; the second syringe is provided with a fixing member for fixing the non-damageable needle at one end away from the first syringe.

[0010] Preferably, the first injection cylinder is provided with a funnel-shaped inner cylinder wall.

[0011] Preferably, a first elastic member is provided between the second injection cylinder and the bracket, and the first elastic member always applies thrust to the second injection cylinder and the bracket.

[0012] Preferably, the scale member is located on the outer wall of the first syringe, and the scale member includes an indicator rod and scale lines; the bracket includes a cover plate located above the positioning member, and the cover plate is provided with a notch for the indicator rod to pass through.

[0013] Preferably, the injection needle assembly is rotatably connected to the bracket, and a toggle rod is installed on the injection needle assembly.

[0014] Preferably, the bracket includes a cover plate located above the positioning member, a second elastic member is provided between the positioning member and the cover plate, and the second elastic member always applies a thrust to the cover plate and the positioning member away from each other.

[0015] Preferably, the bracket is provided with a buckle for fixing the injection needle assembly.

[0016] Preferably, the bracket is provided with a fixing ring for the fixing belt to pass through.

[0017] The beneficial effects of the present invention are:

[0018] The multifunctional injection seat auxiliary device can accurately locate the position of the injection seat, measure and display the embedding depth of the injection seat by setting components such as a base, a positioning part and a scale part, so that it is not easy to slip during the positioning operation, and the operation stability and safety are also high.

[0019] The multifunctional injection seat assist device offers multiple functions, including non-invasive needle fixation and puncture fixation, ensuring high insertion and removal success rates and improved injection stability. The device is also compact and can be fixed to the patient's body during infusion, ensuring excellent operational stability.

[0020] The multifunctional injection seat auxiliary device has a simple structure, is easy to operate and has a low cost; it is also suitable for injection seats of various sizes, without changing the existing widely used injection seats and non-destructive needle structures, and has high adaptability. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1This is a schematic diagram of the overall structure of a multifunctional injection seat auxiliary device according to a specific embodiment of the present invention;

[0022] Figure 2 This is a partial structural diagram of a multifunctional injection seat auxiliary device according to a specific embodiment of the present invention; wherein, Figure 2 A is a schematic diagram of the structure after the base, positioning cylinder and cover are fixed. Figure 2 B is the top view of the base. Figure 2 C is a top view of the cover plate;

[0023] Figure 3 This is a partial structural diagram of a multifunctional injection seat auxiliary device according to a specific embodiment of the present invention; wherein, Figure 3 A is a schematic diagram of the structure of the positioning member and the first injection cylinder, Figure 3 B is the top view of the positioning piece. Figure 3 C is a top view of the first syringe;

[0024] Figure 4 This is a structural diagram of an injection needle assembly of a multifunctional injection seat auxiliary device according to a specific embodiment of the present invention; wherein, Figure 4 A is a schematic diagram of the structure of the second syringe, Figure 4 B is a top view of the second syringe. Figure 4 C is the top view of the top plate, Figure 4 D is the side view of the fixed card seat. Figure 4 E is a schematic diagram of the structure of a non-damaged needle;

[0025] Figure 5 This is a schematic diagram of a multifunctional injection seat auxiliary device for measuring the implantation depth of an injection seat according to a specific embodiment of the present invention.

[0026] Figure 6 This is a schematic diagram of the use of the needle insertion and removal of the multifunctional injection seat auxiliary device according to a specific embodiment of the present invention. DETAILED DESCRIPTION

[0027] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0028] See also Figure 1 , is a multifunctional injection seat auxiliary device of the present invention, including a base 20, a bracket installed on the base 20, a positioning member 50 installed in the bracket, a scale member and an injection needle group 60 installed on the bracket.

[0029] The injection base 10 is implanted subcutaneously in the patient. The end of the injection base 10 closest to the skin contains a diaphragm 110. The diaphragm 110 and the housing of the injection base 10 form a hollow fluid reservoir 120. The non-invasive needle 90 can penetrate the diaphragm 110 and enter the fluid reservoir 120, thereby replenishing the drug solution from the outside to the inside of the body and performing drug therapy. Specifically, the diaphragm 110 is generally made of silicone, and the housing of the injection base 10 is made of a biocompatible, high-strength metal material such as pure titanium or a titanium alloy, or a biocompatible, high-strength polymer material such as PEEK.

[0030] like Figure 1 and Figure 2 As shown, in the multifunctional injection seat auxiliary device, the base 20 includes two rectangular rubber plates 220 and a hollow ring 210 installed between the two rubber plates 220. The inner ring wall of the hollow ring 210 forms a measuring hole. When the base 20 is pressed toward the skin and the injection seat 10 is inserted into the measuring hole, a gap exists between the outer periphery of the injection seat 10 and the hole wall of the measuring hole, thereby determining the specific position of the injection seat 10. The rubber plates 220 and the hollow ring 210 are both provided with a plurality of ventilation holes 240. Medical adhesive 230 is contained under the hollow ring 210 and the rubber plates 220. By pressing the rubber plates 220 and the medical adhesive, the multifunctional injection seat auxiliary device can be fixed to the patient's skin surface.

[0031] like Figure 1 and Figure 2 As shown, the bracket is fixed on the base 20, and the bracket includes a positioning cylinder 30 and a cover plate 40. The cover plate 40 is fixedly mounted on the positioning cylinder 30, and the injection needle group is passed through the cover plate 40 and faces the measuring hole. Specifically, the cover plate 40 is also annular. When the base 20 is pressed toward the skin and the injection seat 10 is extended into the measuring hole, the injection seat 20 is located on the movement path of the positioning member 50, and in the pressing direction of the base 20, the spacing between the positioning member 50 and the base 20 changes, and the scale member is used to reflect the spacing change value. The positioning member 50 is located in the positioning cylinder 30, and the positioning cylinder 30, the base 20, the cover plate 40, the positioning member 50 and the injection needle group 60 form a first cavity, thereby forming a sliding channel in the bracket, and the positioning member 50 is located in the sliding channel and is slidably connected to the sliding channel.

[0032] like Figure 1 、 Figure 3 as well as Figure 4 As shown, the injection needle assembly 60 includes a first syringe 610, a second syringe 620 that is mutually sleeved with the first syringe 610, and a non-damaging needle 90 that passes through the first syringe 610 and the second syringe 620. The first syringe 610 slides along the outer wall of the second syringe 620. One end of the first syringe 610 faces the measuring hole and is fixedly connected to the positioning member 50. Specifically, the positioning member 50 can be a hollow ring 510 (Figure 3 B), the first syringe 610 is positioned adjacent to one end of the injection seat 10 and the inner wall of the hollow ring 510. The upper end of the first syringe 610 is turned outward to form an outer edge 6104, while the lower end of the second syringe 620 is tapered inward to form an inner edge 6201. The outer edge 6104 is positioned above the inner edge 6201, and the two cooperate to prevent the first and second syringes 610 and 620 from falling out.

[0033] like Figure 1 、 Figures 4-6 As shown, a fixing member 730 for securing the non-injurious needle 90 is provided at the end of the second syringe 620 away from the first syringe 610. The non-injurious needle 90 includes a needle head 910, a needle tube 920, a needle body 930, needle wings 940, and a guide tube 950. A top plate 70 is fixedly mounted on the end of the second syringe 620 away from the first syringe 610, through which the non-injurious needle 90 passes. The top plate 70 includes a hollow ring 710 through which the non-injurious needle 90 passes, and the hollow ring 710 includes a notch 750. The hollow ring 710 is fixedly mounted on the second syringe 620. The first syringe 610, the second syringe 620, and the hollow ring 710 form a second cavity. The fixing member 730 is mounted on the side of the hollow ring 710 away from the notch 750. The fixing member 730 includes a slot 7301 and a latch 7302. The latch 7302 is located in the slot 7301 and moves relative to the slot 7301. When the non-invasive needle 90 needs to be fixed, the latch 7302 is moved leftward into the slot 7301 to effectively fix the non-invasive needle 90.

[0034] like Figure 1 and Figure 3 As shown, the first syringe 610 is provided with a funnel-shaped inner wall to limit the position of the intact needle 90. To enhance the limiting effect, a first elastic member 820 is provided between the second syringe 620 and the bracket. The first elastic member 820 constantly applies a thrust to the second syringe 620 and the bracket. Specifically, the first elastic member 820 can be a spring. The top plate 70 of the second syringe 620 is provided with a spring groove 740, and the cover plate 40 is provided with a spring groove 420. The first elastic member is installed between the spring groove 740 and the spring groove 420.

[0035] like Figure 1 and Figure 3As shown, the scale member is located on the outer wall of the first syringe 610 and includes an indicator rod 6101 and scale lines 6102 located below the indicator rod 6101. The bracket includes a cover plate 40 located above the positioning member 50. The indicator rod 6101 is located at the bottom of the cover plate 40, and the cover plate 40 is provided with a notch for the indicator rod 6101 to pass through. The starting zero mark of the scale line 6102 is flush with the end of the indicator rod 6101 closest to the cover plate 40. The scale lines 6102 are graduated from top to bottom with an accuracy of generally 1 mm. When the base 20 is pressed toward the skin and the injection seat 10 is inserted into the measuring hole, the injection seat 20 is located in the movement path of the positioning member 50. In the direction of the base 20 being pressed, the spacing between the positioning member 50 and the base 20 changes. At this time, the value of the scale line 6102 is read to determine the spacing change, thereby determining the implantation depth of the injection seat 10.

[0036] The first syringe 610 of the injection needle assembly 60 is rotatably connected to the cover plate 40 on the bracket. A toggle rod 6103 and a notch for the toggle rod 6103 are fixedly mounted on the injection needle assembly 60. Specifically, the notch includes a notch in the first syringe 610 and a notch in the second syringe 620. The toggle rod 6103 is located on the outer wall of the first syringe 610. The toggle rod 6103, the indicator rod 6101, and the scale lines 6102 are aligned along the length of the first syringe 610. When the toggle rod 6103 is toggled, the injection needle assembly 60 rotates about its axis, causing the indicator rod 6101 to be offset from the notch 440 in the cover plate 40. When the positioning member 50 abuts the bottom of the cover plate 40, the positioning member 50 cannot move upward.

[0037] To enhance the securing effect, a second elastic member 810 is disposed between the positioning member 50 and the cover plate 40. The second elastic member 810 constantly applies a force pushing the cover plate 40 and the positioning member 50 away from each other. Specifically, the second elastic member 810 can be a spring. The positioning member and the cover plate are respectively provided with a spring groove 520 and a spring groove 430. The second elastic member 810 is mounted between the spring groove 520 and the spring groove 430.

[0038] In order to further improve the puncture fixation effect, a buckle 330 is provided on the bracket for fixing the injection needle assembly 60. Figure 6 As shown, the clips 330 are mounted on both sides of the positioning cylinder 30 and can rotate in a direction perpendicular to the injection base 10. During needle insertion and infusion, when the end of the first syringe 620 away from the top plate 70 contacts the cover plate 40, the clips 330 away from the positioning cylinder 30 are rotated to the upper end of the top plate 70, thereby securing the top plate 70 with the intact needle 90 mounted thereon.

[0039] The positioning cylinder 30 of the support is further provided with a fixing ring 320 on both sides, and an elastic band can be inserted into the fixing ring 320, so as to further fix the multifunctional injection seat auxiliary device on the body of the patient, for example, the position of the arm.

[0040] The sizes of the components of the multifunctional injection seat auxiliary device are related. The sizes of the components will be described in detail below.

[0041] The inner diameter R2 of the hollow ring 210 of the base 20 is greater than the diameter R1 of the injection seat 10, the outer diameter R9 of the positioning member 50 is greater than the inner diameter R2 of the hollow ring 210 and less than the inner diameter R3 of the positioning cylinder 20, so as to ensure that the positioning member 50 is always located in the first cavity and can slide. Further, the outer diameter R6 of the hollow ring 210 of the base 20, the outer diameter R4 of the positioning cylinder 30, and the outer diameter R18 of the hollow ring 710 of the top plate 70 are equal. The outer diameter R7 of the cover plate 40 is equal to the inner diameter R3 of the positioning cylinder 30, the inner diameter R8 of the hollow ring 510 of the positioning member 50, the outer diameter R12 of the first injection cylinder 610 close to the positioning member 50, and the inner diameter R14 of the lower end of the second injection cylinder 620 are equal, the outer diameter R13 of the upper end of the first injection cylinder 610 is equal to the inner diameter R15 of the upper end of the second injection cylinder 620, the inner diameter R10 of the lower end of the first injection cylinder 610 is slightly greater than the outer diameter R20 of the needle tube 920 of the atraumatic needle 90, and the inner diameter R11 of the upper end of the first injection cylinder 610 is equal to the inner diameter R17 of the ring 710 of the top plate 70. In summary, the specific size relationship is as follows:

[0042] R4=R6=R18>R3=R7>R9>R2>R1>R16>R13=R15>R5=R8=R12=R14>R11=R17>R10>R20. Exemplarily, taking the sizes of the injection seat 10 and the atraumatic needle 90 as the reference, the sizes of the auxiliary device are: R10=1.1×R20, R11=R17=2.0×R20, R5=R8=R12=R14=2.2×R20, R13=R15=2.5×R20, R16=2.8×R20; R2=1.1×R1, R9=1.3×R1, R3=R7=1.5×R1, R4=R6=R18=2.0×R1.

[0043] The width W3 of the gap 750 of the hollow circular ring 710 of the top plate 70 is greater than the width W1 of the gap 440 of the cover plate 40, and the width W1 of the gap 440 of the cover plate 40 is greater than the width W2 of the indicating rod 6101 and the knob 6103, so as to ensure that the indicating rod 6101 can be moved upward out of the first cavity and achieve the indicating function when the depth of the injection seat 10 is measured. The width W4 of the lower end of the clamping groove 7301 of the fixed clamping seat 730 is slightly greater than the outer diameter R19 of the needle body 930 of the atraumatic needle 90, the width W5 of the upper section of the clamping groove 7301 of the fixed clamping seat 730 is slightly greater than the width W8 of the atraumatic needle 90 after the needle wing 940 is unfolded, the width W6 of the middle section of the clamping groove 7301 of the fixed clamping seat 730 is greater than the width W5 of the upper section of the clamping groove 7301 of the fixed clamping seat 730, the width W7 of the latch 7302 is greater than the width W5 of the upper section of the clamping groove 7301 of the fixed clamping seat 730 and less than the width W6 of the middle section of the clamping groove 7301 of the fixed clamping seat 730, so as to ensure that the atraumatic needle 90 can be placed in the middle section of the clamping groove 7301 of the fixed clamping seat 730, and the atraumatic needle 90 can be clamped and fixed after the latch 7302 is inserted. In summary, W3>W1>W2, W6>W7>W5>W8>W4>R19>R20. Exemplarily, taking the size of the atraumatic needle 90 as a reference, the size of the auxiliary device is: W2=R20, W1=1.3×R20, W3=1.5×R20, W4=1.2×R19, W5=1.5×W8, W7=2.0×W8, W6=2.5×W8.

[0044] The length L3 of the knob 6103 is greater than the length L1 of the gap 440 of the cover plate 40, and the length L1 of the gap 440 of the cover plate 40 is greater than the length L2 of the indicating rod 6101. In summary, L3>L1>L2. In addition, the knob 6103 should not affect the expansion and contraction of the first elastic member 820, that is, the sum of the length L3 of the knob 6103 and the outer radius R12 / 2 of the lower end of the first syringe 610 should be less than the radius of the second spring 820. Exemplarily, taking the size of the atraumatic needle 90 as a reference, the size of the auxiliary device is: L2=R20, L1=1.3×R20, L3=3.0×R20.

[0045] The distance H1 between the bottom surface of the cover plate 40 and the top surface of the base 20 is equal to the distance H3 between the upper end of the indicator rod 6101 and the bottom surface of the circular ring 510 of the positioning member 50, and is greater than the distance H2 between the bottom surface of the injection seat 10 and the skin. The first and second syringes 610 and 620 can slide over equal distances, i.e., H4 = H5. Before puncture, the distance H6 between the bottom surface of the hollow circular ring 710 of the top plate 70 and the needle tip 910 of the intact needle 90 is greater than the distance H7 between the bottom surface of the hollow circular ring 710 and the lower end of the middle transition section of the first syringe 610, and less than the distance H8 between the bottom surface of the hollow circular ring 710 and the lower end of the inner diameter R10 of the first syringe. After puncture, the distance H6 between the bottom of the hollow ring 710 and the needle tip 910 of the non-invasive needle 90 is greater than the distance H9 between the bottom of the hollow ring 710 and the septum 110, and less than the distance H10 between the bottom of the hollow ring 710 and the bottom of the injection seat 10. Overall, the first cavity is ensured to have sufficient height to accommodate the implanted injection seat 10. The non-invasive needle 90 is not exposed before puncture and is located in the middle of the fluid reservoir 120 after puncture, without problems such as incomplete puncture or excessive puncture. Specifically, H1 = H3 > H2, H4 = H5, H8 > H6 > H7, and H10 > H6 > H9.

[0046] like Figure 5 As shown, the main operating procedures of the multifunctional injection seat auxiliary device for positioning and measuring the implantation depth are as follows:

[0047] For ease of description, the spring 80 is not shown. Hold the multifunctional injection seat auxiliary device and place it on the skin surface near the injection seat 10, press the auxiliary device lightly and move the auxiliary device on the skin surface. When the auxiliary device is positioned on the injection seat 10, the injection seat 10 will lift the positioning member 50, thereby driving the positioning member 50 to move upward, and the indicator rod 6101 will be moved out of the first cavity through the notch 440 of the cover plate 40. At this time, the indicator rod 6101 can be observed from the outside, completing the positioning of the injection seat 10. After the positioning of the injection seat 10 is completed, the auxiliary device is preliminarily fixed to the patient's skin surface through the medical adhesive 230 on the bottom surface of the base 20. Specifically, an elastic band (not shown) can also be inserted into the fixing ring 320 on the positioning cylinder 30 and tied to the patient's body to improve the firmness of the fixation of the auxiliary device. Then, the auxiliary device is slowly pressed further, and the indicator rod 6101 gradually moves upward as the pressing progresses. When the indicator rod 6101 stops moving upward or the patient feels noticeable pain, the patient maintains the pressed state and reads the scale mark 6102. This value is the implantation depth of the injection socket 10. When the auxiliary device is released, the positioning member 50 returns to its initial state before the pressing due to the elastic force of the first elastic member 810.

[0048] like Figure 6 As shown, the main process of inserting and removing the needle in this application is as follows:.

[0049] After the auxiliary device is used to complete the positioning of the injection seat 10 and the measurement of the implantation depth, the automatic needle insertion and removal operations can be further performed. Figure 6 In the figure, for ease of description, the spring 80 is not shown. The non-damaging needle 90 is fixed on the fixed base 730 of the auxiliary device, and the needle head 910 and the needle tube 920 are located in the second cavity. The lower end of the needle head 910 is higher than the bottom surface of the positioning member 50 and lower than the lower end of the transition section in the middle of the first sliding cavity 610. After the non-damaging needle 90 is fixed, the toggle rod 6103 is rotated until the indicator rod 6101 is offset from the notch 440 on the cylindrical cover 40. At this time, the bottom surface of the positioning member 50 will not be able to move up when subjected to force, that is, it is stuck. Slowly press the pressing plate 720 of the top plate 70, and the needle tube 920 will move downward in the vertical direction along with the second sliding cavity 620, gradually piercing the diaphragm 110 of the injection seat 10 and reaching the liquid storage tank 120. When the second cavity is pressed to the point where it can no longer move downward, the puncture and needle insertion are completed. The buckle 330 on the positioning cylinder 30 is rotated to lock the top plate 70, preventing it from moving upward under the elastic force of the second elastic member 820, and the infusion from the outside to the inside of the body begins. When the infusion is completed, the buckle 330 on the positioning cylinder 30 is rotated to release the top plate 70. At this time, under the elastic force of the second spring 820, the top plate 70 will move upward, driving the non-invasive needle 90 upward, thereby completing the automatic needle removal process. After the needle removal is completed, the auxiliary device equipped with the non-invasive needle 90 can be removed from the patient's body, and the non-invasive needle 90 can be removed from the auxiliary device. The non-invasive needle 90 and the auxiliary device can be sorted and processed or recycled.

[0050] To test the effectiveness of the multifunctional injection seat assisting device, injection seats of varying sizes were implanted at varying depths under the skin of pigs in vitro. The device was used to measure the implantation depth of the injection seat and to perform needle insertion and removal procedures. The specific results of the measured implantation depth and first-pass success rate are as follows:

[0051]

[0052] The above experimental results show that the multifunctional injection seat auxiliary device of the present invention can accurately measure the implantation depth of the injection seat with a deviation of less than 0.5 mm, while also achieving a high first-pass success rate for needle insertion and removal. When the injection seat size is constant and the implantation depth is small, the first-pass success rate is as high as 100%. When the implantation depth is large, the first-pass success rate is greater than 95%. Furthermore, the first-pass success rate is also high when the injection seat size varies. Therefore, the multifunctional injection seat auxiliary device of the present invention has high positioning accuracy, good operational stability, high safety, and is adaptable to injection seats of various sizes.

[0053] Finally, it should be noted that the above preferred embodiments are merely intended to illustrate the technical solutions of the present application but not to limit the present application. Although the present application has been described in detail through the above preferred embodiments, those skilled in the art should understand that various modifications can be made in form and details without departing from the scope of the present application defined by the claims.

Claims

1. A multifunctional injection seat auxiliary device, characterized in that: The device comprises a base having a measuring hole formed therein. When the base is pressed toward the skin and the injection seat is inserted into the measuring hole, a gap exists between the outer periphery of the injection seat and the wall of the measuring hole. The base is connected to a bracket, and an injection needle assembly is mounted on the bracket, with the injection needle assembly facing the measuring hole. The device further comprises a positioning member and a scale member. When the base is pressed toward the skin and the injection seat is extended into the measuring hole, the injection seat is located on the movement path of the positioning member. In the pressing direction of the base, the distance between the positioning member and the base changes. The scale member is used to reflect the change in the distance. A sliding channel is provided in the bracket, and the positioning member is located in the sliding channel and is slidably connected to the sliding channel; the injection needle assembly includes a first syringe, a second syringe slidably connected to the first syringe, and a non-destructive needle passing through the first and second syringes, one end of the first syringe facing the measuring hole and fixedly connected to the positioning member; the second syringe is provided with a fixing member for fixing the non-destructive needle at one end away from the first syringe; A first elastic member is provided between the second injection cylinder and the bracket, and the first elastic member always applies a thrust to the second injection cylinder and the bracket; The scale member is located on the outer wall of the first injection cylinder, and the scale member includes an indicator rod and scale lines; the bracket includes a cover plate located above the positioning member, and the cover plate is provided with a notch for the indicator rod to pass through; A second elastic member is provided between the positioning member and the cover plate, and the second elastic member always applies a thrust to the cover plate and the positioning member to move away from each other.

2. A multifunctional injection seat auxiliary device according to claim 1, characterized in that: The first injection cylinder is provided with a funnel-shaped inner cylinder wall.

3. A multifunctional injection seat auxiliary device according to claim 1, characterized in that: The injection needle assembly is rotatably connected to the bracket, and a toggle rod is installed on the injection needle assembly.

4. A multifunctional injection seat auxiliary device according to claim 1, characterized in that: The bracket is provided with a buckle for fixing the injection needle assembly.

5. The multifunctional injection seat auxiliary device according to claim 1, characterized in that: The bracket is provided with a fixing ring for the fixing belt to pass through.

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