CN220110206U - Multifunctional injection seat auxiliary device - Google Patents

Abstract

The utility model discloses a multifunctional injection seat auxiliary device; the skin-friendly injection device comprises a base, wherein a measuring hole is formed in the base, and when the base is pressed towards the skin and an injection seat stretches into the measuring hole, a gap exists between the periphery of the injection seat and the hole wall of the measuring hole; the base is connected with a bracket, the bracket is provided with an injection needle set, and the injection needle set faces the measuring hole; the injection seat is positioned on the movement path of the positioning piece in the process that the base is pressed towards the skin and the injection seat extends into the measuring hole; in the pressing direction of the base, the distance between the positioning piece and the base is changed; the scale piece is used for reflecting the distance change value; the device can accurately position the injection seat, measure and display the implantation depth of the injection seat, and is not easy to cause slipping; meanwhile, the device has the functions of fixing a non-damaged needle, fixing a puncture and the like, and has high operation stability and safety; in addition, the size is small and exquisite, the structure is simple, the operation is easy, is applicable to the injection seat of multiple size.

Description

Multifunctional injection seat auxiliary device

Technical Field

The utility model belongs to the technical field of medical appliances, and particularly relates to a multifunctional injection seat auxiliary device.

Background

Currently, with the development of multiple functions of active implantation instruments, more active implants also have a function of long-term administration, for example, an administration cochlear implant is often equipped with a subcutaneous injection seat and a drug storage bin. The external injection system passes through the skin to be connected with the injection seat and supplements the medicine liquid in the medicine storage bin, and the medicine liquid in the medicine storage bin is actively or passively released to the target area so as to realize the treatment effect.

However, the injection seat in such a system can only perform the function of in vivo/in vitro communication, and is generally difficult to position due to its small size. The intravenous port is a typical implantable drug delivery device with an injection site, where the drug delivery end of the catheter is percutaneously pierced into the target area by surgery, and the remaining catheter and injection site are buried in the subcutaneous tissue and sutured secured, with a circular protrusion only being palpable to the patient's body surface. From there, the atraumatic needle is positioned, penetrated through the septum and into the reservoir of the injection seat, and the liquid medicine is accurately delivered to the target area where the administration end of the catheter is located through the catheter. Clinically, in the process of inserting the needle, medical staff often needs to use the thumb, the index finger and the middle finger of a non-dominant hand to simultaneously sense the position outline of the injection seat and pinch and fix the injection seat, further sense the thickness of skin tissue right above to select a safety needle with proper length, select the central part of the skin bulge, and the dominant hand-held safety needle vertically pierces from the center of the three fingers, penetrates through the diaphragm and directly reaches the bottom of the injection seat. Because the injection seat is buried under the skin, slipping often occurs during positioning operation, and because the other hand of an operator holds the puncture end head, the whole puncture operation is more troublesome, the phenomenon of slipping often occurs, and puncture failure is caused. In addition, excessive force applied to the injection seat for pressing or positioning and kneading can cause damage to the seat body and the epithelial tissue. In the process of pulling out the needle, as the safety needle is perpendicular to the injection seat, the insertion distance of the needle head is deeper, the needle head is tightly combined with the base, the needle head can be pulled out with great force, and the pulling-out force and the stability are not easy to control.

With the development of technology, the implant device itself is gradually designed optimally. For example, patent application number 202210999263.2 discloses a magnetic fully implantable intravenous infusion port, which comprises a magnetic port body device and a magnetic positioning device, and the simulated insertion operation shows that the success rate of one puncture of the device can reach 100%. However, the introduction of magnetic means will prevent the patient from performing a magnetic resonance examination, which is often very necessary for oncology patients. Patent application number 202211280530.7 discloses an implantable intravenous administration device and implantable intravenous administration system, and the transfusion harbor has circuit board, electromagnetic induction coil and near infrared LED lamp, implants near infrared LED lamp and can conveniently image through current infrared imaging technique, realizes the location to a plurality of light emitting sources to provide audio-visual puncture guide for medical personnel. However, the system is relatively complex, expensive and also suffers from magnetic resonance examination interference. At present, there are also technical solutions for optimizing the design of atraumatic needles. Patent application number 202210948927.2 discloses a safe and harmless transfusion port needle, which comprises a needle cylinder, a needle body and a safe base. Patent application number 201910914454.2 discloses a self-locking safety needle for an infusion port, and an optimized atraumatic needle has the functions of puncture positioning and protection. However, since the injection needle is three types of medical devices, the biosafety requirements of the improved intact needle overall structure are in need of improvement.

In summary, the conventional injection seat auxiliary device has the problems of poor positioning accuracy, poor operation stability and low safety during infusion, and the conventional injection seat auxiliary device cannot improve the problems.

Disclosure of Invention

In order to solve the problems, the technical scheme of the utility model is as follows: the multifunctional injection seat auxiliary device comprises a base, wherein a measuring hole is formed in the base, and when the base is pressed towards the skin and the injection seat stretches into the measuring hole, a gap exists between the periphery of the injection seat and the hole wall of the measuring hole; the base is connected with a bracket, the bracket is provided with an injection needle set, and the injection needle set faces the measuring hole;

the injection seat is positioned on the movement path of the positioning piece in the process that the base is pressed towards the skin and the injection seat extends into the measuring hole; in the pressing direction of the base, the distance between the positioning piece and the base is changed; the scale piece is used for reflecting the distance change value.

Preferably, a sliding channel is arranged in the bracket, and the positioning piece is positioned in the sliding channel and is in sliding connection with the sliding channel.

Preferably, the injection needle group comprises a first injection cylinder, a second injection cylinder which is in sliding sleeve joint with the first injection cylinder, and a nondestructive needle which penetrates through the first injection cylinder and the second injection cylinder, wherein one end of the first injection cylinder faces to the measuring hole and is fixedly connected with the positioning piece; one end of the second injection cylinder far away from the first injection cylinder is provided with a fixing piece for fixing the atraumatic needle.

Preferably, a funnel-shaped inner cylinder wall is arranged in the first injection cylinder.

Preferably, a first elastic piece is arranged between the two injection barrels and the bracket, and the first elastic piece always applies thrust to the second injection barrels and the bracket.

Preferably, the scale piece is positioned on the outer wall of the first injection cylinder, and comprises an indication rod and scale marks; the support comprises a cover plate positioned above the positioning piece, and a notch for the indication rod to pass through is formed in the cover plate.

Preferably, the injection needle group is rotatably connected with the bracket, and the toggle rod is arranged on the injection needle group.

Preferably, the support comprises a cover plate positioned above the positioning piece, a second elastic piece is arranged between the positioning piece and the cover plate, and the second elastic piece always applies thrust force for the cover plate and the positioning piece to deviate from each other.

Preferably, the bracket is provided with a buckle for fixing the injection needle set.

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

The utility model has the beneficial effects that:

this multi-functional injection seat auxiliary device is through setting up parts such as base, setting element and scale spare, can the accurate positioning injection seat the position, measures and shows injection seat implantation degree of depth to be difficult for appearing the slippage problem when location operation, operating stability and security are also higher.

The multifunctional injection seat auxiliary device has the functions of fixing the atraumatic needle, fixing the puncture and the like, has high success rate of inserting and extracting the needle, and improves the injection operation stability. Meanwhile, the device has small size, can be fixed on the body part of a patient during transfusion, and has better operation stability.

The multifunctional injection seat auxiliary device has simple structure, easy operation and lower cost; meanwhile, the injection seat is also suitable for injection seats with various sizes, the existing widely applied injection seat and the atraumatic needle structure do not need to be changed, and the adaptability is high.

Drawings

FIG. 1 is a schematic view of the overall structure of a multifunctional injection seat auxiliary device according to an embodiment of the present utility model;

FIG. 2 is a schematic view of a structure of a base, a positioning cylinder and a cover plate of a multifunctional injection seat auxiliary device according to an embodiment of the utility model;

FIG. 3 is a top view of a base of a multi-functional injection seat assist device according to an embodiment of the present utility model;

FIG. 4 is a top view of a cover plate of a multi-functional injection seat accessory device according to an embodiment of the present utility model;

FIG. 5 is a schematic view of the positioning member and the first syringe in the multifunctional injection seat auxiliary device according to an embodiment of the present utility model;

FIG. 6 is a top view of a positioning member of the multi-functional injection seat assist device according to an embodiment of the present utility model;

FIG. 7 is a top view of a first syringe of the multi-functional injection seat assist device according to an embodiment of the present utility model;

FIG. 8 is a schematic view of a structure of a second syringe in the needle set of the multifunctional injection seat auxiliary device according to an embodiment of the present utility model;

FIG. 9 is a top view of a second syringe in the needle set of the multi-functional injection seat assist device according to an embodiment of the present utility model;

FIG. 10 is a top view of a top plate of an injection needle set of a multi-functional injection seat assist device according to an embodiment of the present utility model;

FIG. 11 is a side view of a retaining clip in an injection needle set of a multi-functional injection seat attachment device according to an embodiment of the present utility model;

FIG. 12 is a schematic view showing the structure of a atraumatic needle in the needle set of the multifunctional injection seat auxiliary device according to an embodiment of the present utility model;

FIG. 13 is a schematic view of a multifunctional injection seat assist device for determining injection seat implantation depth according to an embodiment of the present utility model.

Fig. 14 is a schematic view illustrating the use of the insertion and extraction pins of the multifunctional injection seat auxiliary device according to an embodiment of the present utility model.

Detailed Description

Preferred embodiments of the present utility model will be described in detail below with reference to the accompanying drawings.

Referring to fig. 1, the multifunctional injection seat auxiliary device of the present utility model comprises a base 20, a bracket mounted on the base 20, a positioning member 50 mounted in the bracket, a scale member and an injection needle set 60 mounted on the bracket.

The injection seat 10 is implanted under the skin of a patient, one end of the injection seat 10 close to the skin is provided with a diaphragm 110, and the diaphragm 110 and the shell of the injection seat 10 form a hollow liquid storage groove 120. The atraumatic needle 90 can penetrate the membrane 110 into the reservoir 120, thereby achieving the effect of replenishing the medical fluid from outside the body to inside the body and performing the medical treatment. Specifically, the membrane 110 is generally made of silica gel, and the shell material of the injection seat 10 is a metal material with good biocompatibility and high strength, such as pure titanium, titanium alloy, etc., or a high-strength polymer material with good biocompatibility, such as PEEK, etc., may be used.

As shown in fig. 1 and 2-4, in the multifunctional injection seat auxiliary device, the base 20 includes two rectangular rubber plates 220 and a hollow circular ring 210 installed between the two rubber plates 220, and an inner circumferential wall of the hollow circular ring 210 forms a measuring hole. When the base 20 is pressed towards the skin and the injection seat 10 extends into the measuring hole, a gap exists between the periphery of the injection seat 10 and the wall of the measuring hole, so that the specific position of the injection seat 10 is determined. The rubber plate 220 and the hollow circular ring 210 are provided with a plurality of ventilation holes 240, the hollow circular ring 210 and the rubber plate 220 are provided with medical adhesive 230, and the multifunctional injection seat auxiliary device can be fixed on the skin surface of a patient by pressing the rubber plate 220 and the medical adhesive.

As shown in fig. 1, 2-4, the bracket is fixed on the base 20, the bracket comprises a positioning cylinder 30 and a cover plate 40, the cover plate 40 is fixedly installed on the positioning cylinder 30, and the injection needle group penetrates through the cover plate 40 and faces the measuring hole. Specifically, the cover 40 is also annular. In the process that the base 20 is pressed towards the skin and the injection seat 10 extends into the measuring hole, the injection seat 20 is located on the moving path of the positioning piece 50, and in the pressing direction of the base 20, the distance between the positioning piece 50 and the base 20 changes, and the scale piece is used for reflecting the distance change value. The positioning member 50 is located in the positioning cylinder 30, and the positioning cylinder 30, the base 20, the cover 40, the positioning member 50 and the injection needle set 60 form a first cavity, so that a sliding channel is formed in the bracket, and the positioning member 50 is located in the sliding channel and is slidably connected with the sliding channel.

As shown in fig. 1 and 5-12, the injection needle set 60 includes a first syringe 610, a second syringe 620 sleeved with the first syringe 610, and an atraumatic needle 90 passing through the first syringe 610 and the second syringe 620, wherein the first syringe 610 slides along the outer cylinder wall of the second syringe 620, and one end of the first syringe 610 faces the measuring hole and is fixedly connected with the positioning member 50. Specifically, the positioning member 50 may be a hollow circular ring 510 (shown in fig. 6), and an end of the first syringe 610 near the injection seat 10 and an inner wall of the hollow circular ring 510. The upper end of the first syringe 610 is turned outward to form an outer edge 6104, the lower end of the second syringe 620 is turned inward to form an inner edge 6201, the outer edge 6104 is located above the inner edge 6201, and the two parts cooperate to prevent the first syringe 610 and the second syringe 620 from being easily separated.

As shown in fig. 1 and 8-14, the end of the second syringe 620 remote from the first syringe 610 is provided with a fixing member 730 for fixing the atraumatic needle 90. Atraumatic needle 90 includes a needle 910, a needle cannula 920, a needle body 930, wings 940, and a catheter 950. The second syringe 620 has a top plate 70 fixedly mounted on an end thereof remote from the first syringe 610 for passing the atraumatic needle 90 therethrough, the top plate 70 including a hollow annular ring 710 for passing the atraumatic needle 90 therethrough, the hollow annular ring 710 having a notch 750 therein. The hollow circular ring 710 is fixedly mounted on the second syringe 620, and the first syringe 610, the second syringe 620 and the hollow circular ring 710 form a second cavity. The mount 730 is mounted on the side of the hollow ring 710 remote from the gap 750. The fixing member 730 includes a catching groove 7301 and a catching pin 7302, the catching pin 7302 is located in the catching groove 7301, and the catching pin 7302 moves relative to the catching groove 7301. When the atraumatic needle 90 needs to be fixed, the latch 7302 is moved leftwards into the catch slot 7301, thereby effectively fixing the atraumatic needle 90.

As shown in fig. 1 and 5-7, a funnel-shaped inner cylinder wall is provided in the first syringe 610 to limit the atraumatic needle 90. In order to improve the limiting effect, a first elastic member 820 is disposed between the second syringe 620 and the bracket, and the first elastic member 820 always applies a pushing force to the second syringe 620 and the bracket. Specifically, the first elastic member 820 may be a spring, the top plate 70 of the second syringe 620 is provided with a spring groove 740, the cover plate 40 is provided with a spring groove 420, and the first elastic member is installed between the spring groove 740 and the spring groove 420.

As shown in fig. 1 and 5-7, a scale is positioned on the outer wall of the first syringe 610, and the scale comprises an indication rod 6101 and a scale line 6102 positioned below the indication rod 6101; the bracket comprises a cover plate 40 positioned above the positioning piece 50, the indicating rod 6101 is positioned at the bottom of the cover plate 40, and a notch for the indicating rod 6101 to pass through is arranged on the cover plate 40. The initial zero scale of the scale line 6102 is flush with the end of the indication rod 6101 near the cover 40, and the scale of the scale line 6102 is from top to bottom, and the accuracy is generally 1mm. When the base 20 is pressed towards the skin and the injection seat 10 extends into the measuring hole, the injection seat 20 is located on the moving path of the positioning member 50, and in the pressing direction of the base 20, the distance between the positioning member 50 and the base 20 changes, and at this time, the distance change is determined by reading the value of the scale line 6102, so as to determine the implantation depth of the injection seat 10.

The first syringe 610 of the injection needle set 60 is rotatably connected with the cover plate 40 on the bracket, and the injection needle set 60 is fixedly provided with a toggle lever 6103 and a notch for the toggle lever 6103 to pass through. Specifically, the notch includes a notch located on the first syringe 610 and a notch located on the second syringe 620. The toggle lever 6103 is disposed on the outer wall of the first syringe 610, and the toggle lever 6103, the indicating lever 6101, and the scale line 6102 are arranged along the length direction of the first syringe 610. When the toggle lever 6103 is toggled, the injection needle set 60 can rotate around the axis thereof, so that the indication lever 6101 is staggered from the notch 440 on the cover 40, and when the positioning member 50 abuts against the bottom of the cover 40, the positioning member 50 cannot move upwards.

In order to enhance the fixing effect, a second elastic member 810 is disposed between the positioning member 50 and the cover 40, and the second elastic member 810 always applies a pushing force to the cover 40 and the positioning member 50. Specifically, the second elastic member 810 may be a spring, and the positioning member and the cover plate are respectively provided with a spring groove 520 and a spring groove 430, and the second elastic member 810 is installed between the spring groove 520 and the spring groove 430.

To further enhance the puncture fixation, the holder is provided with a catch 330 for fixing the needle set 60. As shown in fig. 6, the stoppers 330 are installed at both sides of the positioning cylinder 30, and the stoppers 330 are rotatable in a direction perpendicular to the injection seat 10. When the needle insertion infusion is performed, the end of the first syringe 620 away from the top plate 70 is brought into contact with the cover plate 40, and the end of the buckle 330 away from the positioning cylinder 30 is rotated to the upper end of the top plate 70, so that the top plate 70 with the atraumatic needle 90 is fixedly mounted.

The fixing rings 320 are respectively provided at both sides of the positioning cylinder 30 of the bracket, and elastic bands can be inserted into the fixing rings 320, so that the multifunctional injection seat auxiliary device is further fixed on the patient's body, for example, at the arm position.

There is a certain correlation between the dimensions of the various components of the multi-functional injection seat auxiliary device. The dimensions of the various components will be described in detail below.

The inner diameter R2 of the hollow circular ring 210 of the base 20 is larger than the diameter R1 of the injection seat 10, and the outer diameter R9 of the positioning member 50 is larger than the inner diameter R2 of the hollow circular ring 210 and smaller than the inner diameter R3 of the positioning cylinder 20, so that the positioning member 50 is ensured to be always located in the first cavity and capable of sliding. Further, the outer diameter R6 of the hollow circular ring 210 of the base 20, the outer diameter R4 of the positioning cylinder 30, and the outer diameter R18 of the hollow circular 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 circular ring 510 of the positioning piece 50, the outer diameter R12 of one end of the first injection cylinder 610 close to the positioning piece 50, 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 larger than the outer diameter R20 of the needle tube 920 of the nondestructive 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 circular ring 710 of the top plate 70. Comprehensively, the specific dimensional relationships are as follows:

r4=r6=r18 > r3=r7 > r9> r2> r1> r16> r13=r15 > r5=r8=r12=r14 > r11=r17 > r10> r20. Illustratively, taking the dimensions of the injection seat 10 and the atraumatic needle 90 as a reference, the dimensions 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.

The width W3 of the notch 750 of the hollow circular ring 710 of the top plate 70 is greater than the width W1 of the notch 440 of the cover plate 40, and the width W1 of the notch 440 of the cover plate 40 is greater than the widths W2 of the indication lever 6101 and the toggle lever 6103, so as to ensure that the indication lever 6101 can move up out of the first cavity and realize the indication function when the burial depth of the injection seat 10 is measured. The width W4 of the lower end of the clamping groove 7301 of the fixing clamping seat 730 is slightly larger than the outer diameter R19 of the needle body 930 of the nondestructive needle 90, the width W5 of the upper section of the clamping groove 7301 of the fixing clamping seat 730 is slightly larger than the width W8 of the unfolded needle wing 940 of the nondestructive needle 90, the width W6 of the middle section of the clamping groove 7301 of the fixing clamping seat 730 is larger than the width W5 of the upper section of the clamping groove 7301 of the fixing clamping seat 730, the width W7 of the bolt 7302 is larger than the width W5 of the upper section of the clamping groove 7301 of the fixing clamping seat 730 and smaller than the width W6 of the middle section of the clamping groove 7301 of the fixing clamping seat 730, the nondestructive needle 90 can be placed in the clamping groove 7301 of the fixing clamping seat 730, and the nondestructive needle 90 can be clamped and fixed after the bolt 7302 is inserted. Comprehensively, W3> W1> W2, W6> W7> W5> W8> W4> R19> R20. Illustratively, with reference to the size of atraumatic needle 90, the auxiliary device is sized: 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.

The length L3 of the toggle lever 6103 is greater than the length L1 of the notch 440 of the barrel cover 40, and the length L1 of the notch 440 of the barrel cover 40 is greater than the length L2 of the indicating lever 6101. Comprehensively, L3> L1> L2. In addition, the lever 6103 should not affect the expansion and contraction of the first elastic member 820, i.e. the sum of the length L3 of the lever 6103 and the outer radius R12/2 of the lower end of the first syringe 610 is smaller than the radius of the second spring 820. Illustratively, with reference to the size of atraumatic needle 90, the auxiliary device is sized: l2=r20, l1=1.3×r20, l3=3.0×r20.

The distance H1 between the bottom surface of the cover 40 and the top surface of the base 20 is equal to the distance H3 between the upper end of the indication lever 6101 and the bottom surface of the 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 syringe 610 and the second syringe 620 are slidable an equal distance, i.e., h4=h5. Before the needle insertion, the distance H6 between the bottom surface of the hollow circular ring 710 of the top plate 70 and the needle 910 of the atraumatic 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 smaller 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 the insertion needle is pierced, the distance H6 between the bottom surface of the hollow circular ring 710 and the needle tip 910 of the atraumatic needle 90 is greater than the distance H9 between the bottom surface of the hollow circular ring 710 and the septum 110 and less than the distance H10 between the bottom surface of the hollow circular ring 710 and the bottom surface of the injection seat 10. Overall, the first cavity is ensured to have a sufficient height to accommodate the implanted injection site 10 without exposing the atraumatic needle 90 prior to penetration and to be positioned in the middle of the reservoir 120 after penetration without problems such as non-penetration or excessive penetration. Specifically, h1=h3 > H2, h4=h5, H8> H6> H7, H10> H6> H9.

As shown in fig. 13, the main operation flow of the positioning and the implantation depth measurement of the multifunctional injection seat auxiliary device is as follows:

for ease of description, the spring 80 is not shown. The multi-function injection site accessory is held and placed on the skin surface adjacent the injection site 10, pressing the accessory slightly and moving the accessory over the skin surface. When the auxiliary device is positioned to the injection seat 10, the injection seat 10 will jack up the positioning member 50, thereby driving the positioning member 50 to move upwards, the indication rod 6101 will be moved out of the first cavity through the notch 440 of the cover 40, and at this time, the indication rod 6101 can be observed from the outside, so as to complete the positioning of the injection seat 10. After the injection seat 10 is positioned, the auxiliary device is primarily fixed to the skin surface of the patient by the medical adhesive 230 on the bottom surface of the base 20. Specifically, elastic bands (not shown) may be inserted into the fixing rings 320 of the positioning cylinder 30 and tied to the patient's body to enhance the fixing firmness of the auxiliary device. Then, the auxiliary device is further pressed slowly, the indication lever 6101 will move up gradually along with the pressing process, and when the indication lever 6101 does not move up any more or the patient feels obvious pain, the pressing state is maintained and the scale on the scale line 6102 is read, and the value is the implantation depth of the injection seat 10. The positioning member 50 is restored to the original state before being pressed by the elastic force of the first elastic member 810 when the auxiliary device is released.

As shown in fig. 14, the main flow of the insertion and extraction of the present utility model is as follows:

after the positioning of the injection seat 10 and the implantation depth measurement are completed using the auxiliary device, automatic needle insertion and needle extraction operations may be further performed. In fig. 6, the spring 80 is not shown for convenience of description. The atraumatic needle 90 is secured to a mounting hub 730 of the auxiliary device with the needle 910 and needle cannula 920 positioned in the second cavity, the lower end of the needle 910 being higher than the bottom surface of the positioning member 50 and lower than the lower end of the middle transition section of the first sliding chamber 610. After the atraumatic needle 90 is fixed, the toggle 6103 is rotated until the indication lever 6101 is staggered from the notch 440 on the cylinder cover 40, and the bottom surface of the positioning member 50 cannot move upwards when being stressed, i.e. is blocked. The needle tube 920 moves downward in the vertical direction along with the second sliding chamber 620 by slowly pressing the pressing plate 720 of the top plate 70, and gradually pierces the membrane 110 of the injection seat 10 to reach the reservoir 120. When the second cavity is pressed, the puncture needle can not move downwards continuously. The clip 330 on the positioning cylinder 30 is rotated to lock the top plate 70 so that it cannot move upward under the elastic force of the second elastic member 820, and the infusion from outside the body to inside the body is started. When the transfusion is finished, the buckle 330 on the positioning cylinder 30 is rotated to release the top plate 70, and at this time, under the action of the elastic force of the second spring 820, the top plate 70 moves upwards and drives the atraumatic needle 90 to move upwards, so as to realize the automatic needle pulling process. After the needle is pulled out, the auxiliary device with the atraumatic needle 90 can be removed from the patient, the atraumatic needle 90 can be removed from the auxiliary device, and the atraumatic needle 90 and the auxiliary device can be classified for treatment or recovery.

In order to test the use effect of the multifunctional injection seat auxiliary device, injection seats with different sizes are implanted at different depths under the pigskin of an in-vitro experiment, the implantation depth of the injection seat is measured by using the multifunctional injection seat auxiliary device, and operations such as inserting and extracting are performed. The specific results of the obtained actual measurement value of the implantation depth and the primary success rate are as follows:

according to the experimental result, the multifunctional injection seat auxiliary device can accurately measure the implantation depth of the injection seat, the deviation is within 0.5mm, and meanwhile, the one-time success rate of inserting and extracting the needle is high. When the size of the injection seat is fixed, the one-time success rate is up to 100% when the implantation depth is smaller, and the one-time success rate is greater than 95% when the implantation depth is larger. Meanwhile, when the size of the injection seat is changed, the one-time success rate is also higher. Therefore, the multifunctional injection seat auxiliary device has the advantages of high positioning accuracy, good operation stability and high safety, and can be suitable for injection seats with various sizes.

Finally, it is noted that the above-mentioned preferred embodiments are only intended to illustrate rather than limit the utility model, and that, although the utility model has been described in detail by means of the above-mentioned preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the scope of the utility model as defined by the appended claims.

Claims (10)

1. The multifunctional injection seat auxiliary device is characterized by comprising a base, wherein a measuring hole is formed in the base, and when the base is pressed towards the skin and the injection seat extends into the measuring hole, a gap exists between the periphery of the injection seat and the hole wall of the measuring hole; the base is connected with a bracket, the bracket is provided with an injection needle set, and the injection needle set faces the measuring hole;

the injection seat is positioned on the movement path of the positioning piece in the process that the base is pressed towards the skin and the injection seat extends into the measuring hole; in the pressing direction of the base, the distance between the positioning piece and the base is changed; the scale piece is used for reflecting the distance change value.

2. The multi-purpose injection seat auxiliary device according to claim 1, wherein a sliding channel is arranged in the bracket, and the positioning piece is positioned in the sliding channel and is in sliding connection with the sliding channel.

3. The multifunctional injection seat auxiliary device according to claim 2, wherein the injection needle group comprises a first injection cylinder, a second injection cylinder which is in sliding sleeve connection with the first injection cylinder, and a nondestructive needle which penetrates through the first injection cylinder and the second injection cylinder, wherein one end of the first injection cylinder faces to the measuring hole and is fixedly connected with the positioning piece; one end of the second injection cylinder far away from the first injection cylinder is provided with a fixing piece for fixing the atraumatic needle.

4. A multi-function injection seat assist device as recited in claim 3 wherein said first syringe has a funnel-shaped inner barrel wall disposed therein.

5. A multi-functional injection seat auxiliary device according to claim 3, wherein a first elastic member is arranged between the second injection cylinder and the bracket, and the first elastic member always applies thrust to the second injection cylinder and the bracket.

6. A multi-function injection seat auxiliary device according to claim 3, wherein the scale member is located on the outer wall of the first syringe, the scale member comprising an indicator rod and scale marks; the support comprises a cover plate positioned above the positioning piece, and a notch for the indication rod to pass through is formed in the cover plate.

7. The multi-purpose injection seat auxiliary device according to claim 6, wherein the injection needle set is rotatably connected with the bracket, and a toggle rod is mounted on the injection needle set.

8. The multifunctional injection seat auxiliary device according to claim 2, wherein the bracket comprises a cover plate positioned above the positioning piece, a second elastic piece is arranged between the positioning piece and the cover plate, and the second elastic piece always applies a pushing force for the cover plate and the positioning piece to deviate from each other.

9. The multi-functional injection seat auxiliary device according to claim 1, wherein a buckle for fixing the injection needle set is provided on the bracket.

10. The multi-purpose injection seat auxiliary device according to claim 1, wherein a fixing ring for passing a fixing belt is provided on the bracket.