Disposable clamping seat type puncture guide device

Abstract

The disposable clamping seat type puncture guiding device comprises a support body and two guiding seats, the support body is detachably arranged on a shell of a vascular ultrasonic probe, and the support body is located at the detection end of the vascular ultrasonic probe; the two guide seats are symmetrically arranged on the support body, puncture needle grooves used for guiding puncture needles to enter are formed in the guide seats, puncture guide inlets are formed in the insertion ends of the puncture needle grooves and are round holes, and the support body is made of transparent polycarbonate. The puncture needle has the advantages that the guide seat can guide the puncture needle, so that the puncture needle can puncture at a proper angle; the polycarbonate can greatly reduce the mass of the stent body, and is convenient for medical staff to operate for a long time.

Description

Technical Field

[0001] The invention relates to the technical field of medical devices, in particular to a disposable cartridge-type puncture introducer. Background Art

[0002] Ultrasound-guided vascular puncture can be divided into long-axis and short-axis according to the vascular section. The long axis refers to the longitudinal section of the blood vessel displayed on the ultrasound image, while the short axis refers to the cross-section of the blood vessel. Generally speaking, the long axis is generally an in-plane method, and the short axis is generally an out-of-plane method. In actual applications, when facing the puncture of ultra-fine blood vessels, the in-plane method is more popular with operators because it can continuously observe the puncture needle trajectory. However, the main shortcoming of the long-axis in-plane method is that if the angle between the ultrasound probe and the puncture needle changes slightly, the needle will deviate from the ultrasound section and lose the image. Therefore, in order to improve the accuracy of the puncture needle relative to the ultrasound section, users expect a device that can guide the needle insertion to match the ultrasound section while magnetically navigating to guide the needle insertion angle.

[0003] At the same time, in some cases, the operator needs two needles at different angles to puncture the target at the same time, or two needles of different models need to operate on the same target area at different angles at the same time. A guide that can insert needles on both sides of the ultrasound probe can achieve this. In addition, the guide can be assembled and combined at any time to adapt to different types of puncture needles.

[0004] However, in actual clinical applications, the operation of metal fixed puncture stents is very inflexible, and there is no way to adjust the angle after the needle is inserted. The user can only withdraw the needle and try again. During the puncture of superficial blood vessels or tissues, the weight of the metal stent plus the probe forces the operator to continuously exert force to stabilize the probe in the air, which is not only tiring but also prone to operation failure.

[0005] Finally, in some special patients, such as those with loose epidermis, loose subcutaneous fat, reduced elastic fibers in the venous lining, and thickening of the lining leading to reduced venous elasticity, the existing stents are difficult to tighten and fix the skin during puncture, and are also unable to apply appropriate pressure, unable to fill the blood vessels on both sides of the target segment, making puncture inconvenient. Summary of the invention

[0006] In view of the above requirements, the present invention proposes a disposable cartridge-type puncture guide to solve the problems of simultaneous puncture of multiple points, puncture angle, equipment weight, stable needle insertion operation surface, etc. in ultrasound-guided puncture.

[0007] In order to achieve the above purpose, the technical solution of the present invention is a disposable cartridge-type puncture guide, including a bracket body and two guide seats, the bracket body is detachably arranged on the outer shell of the vascular ultrasound probe, and the bracket body is located at the detection end of the vascular ultrasound probe; the two guide seats are symmetrically arranged on the bracket body, and a puncture needle groove for guiding the puncture needle to enter is arranged on the guide seat, and a puncture guide entrance is arranged at the insertion end of the puncture needle groove, and the puncture guide entrance is a circular hole. The material of the bracket body is transparent polycarbonate.

[0008] The technical solution of this embodiment can guide the puncture needle by setting the structure of the guide seat, and cooperate with the vascular ultrasound probe to make the puncture needle puncture at a suitable position and at an appropriate angle. At the same time, the guide seat is a detachable connection, and a suitable guide seat can be selected as needed to match puncture needles of different specifications; the adjustable conical cavity structure of the bracket body can be adapted to vascular ultrasound probes of various specifications, and the universality is higher; the protrusion structure is set on the bonding plate, the pressure per unit area can be reduced, and the comfort is improved. At the same time, when the bonding plate is fitted to the patient's skin, the skin between the bonding plates can be tightened to facilitate puncture. The bonding plate is provided with a convex block, and the convex block is engaged with the snap block to connect the bracket body to the vascular ultrasound probe; by setting the structure of the guide member, the puncture needle is fitted with the guide member, and the puncture angle can be adjusted by adjusting the angle of the guide member, which is more practical.

[0009] Preferably, the bracket body is provided with a conical cavity for wrapping the detection end of the vascular ultrasound probe, and the size of the conical cavity of the bracket body is adjustable, and the size of the conical cavity matches the vascular ultrasound probe. The adjustable conical cavity can be used with vascular ultrasound probes of various specifications, and has strong applicability.

[0010] Preferably, the bracket body comprises a plurality of bracket plates, each two adjacent bracket plates are movably connected, the plurality of bracket plates enclose a conical cavity, an adjustment mechanism for adjusting the size of the conical cavity is arranged on the bracket plates, the conical cavity is formed by enclosing the bracket plates, and the size of the conical cavity can be adjusted by adjusting the bracket plates.

[0011] Preferably, the adjustment mechanism includes a locking stud, which is rotatably connected to the bracket plate and threadedly connected to two bracket plates adjacent to the bracket plate. The threads at both ends of the locking stud are opposite. The adjustment mechanism can be locked during adjustment, and the movable distance between the two adjacent bracket plates will not change after adjustment, which is convenient for adjusting the bracket body to the optimal size.

[0012] Preferably, the bracket body further comprises two fitting plates for being closely attached to the skin, the two fitting plates being symmetrically arranged on the bracket body, the symmetry axes of the fitting plates being perpendicular to the symmetry axes of the guide seats, a plurality of protrusions being arranged on the upper surfaces of the fitting plates, a fixing plate being arranged on the lower surfaces of the fitting plates, a protrusion being arranged on the fixing plate for cooperating with the locking block on the vascular ultrasound probe, the fitting plates being used to fit with the skin of the patient near the puncture area, the protrusions being able to increase the contact area and being able to make the patient's skin taut when fitting to facilitate puncture, the protrusion on the fixing plate being engaged with the locking block and fitting tightly to achieve the connection between the bracket body and the vascular ultrasound probe.

[0013] Preferably, the guide seat is made of transparent polycarbonate or resin containing NdFeB magnetic powder. Polycarbonate is light in texture, which can greatly reduce the problem of traditional metal bracket increasing the weight of the probe and is convenient for long-term operation. The guide seat made of transparent polycarbonate can directly adjust the angle of the puncture needle manually through observation, and is convenient for observing the blood return of the cannula needle; the guide seat made of resin containing NdFeB magnetic powder can magnetize the puncture needle, and the magnetization direction of the puncture needle is basically consistent with the needle insertion direction, so the puncture needle obtains the highest magnetic performance in the needle insertion direction. While receiving the magnetic direction of the puncture needle, the vascular ultrasound probe can display the expected path direction of the puncture needle in a dotted line on the external display screen, which is more intuitive.

[0014] Preferably, a card block is provided on the guide seat, and the guide seat and the bracket body are clamped together by the card block. The guide seat is fixed by clamping, and is a detachable connection. A suitable guide seat is selected for installation as needed. At the same time, two guide seats are provided, which are located on both sides of the bracket body, so that puncture at two points can be achieved at the same time.

[0015] Preferably, the end of the guide seat away from the vascular ultrasound probe is tilted upward and forms an inclination angle β with the horizontal plane, and the inclination angle β ranges from 13° to 20°. Due to the existence of the inclination angle β, when the guide seat fits the patient's skin, the skin between the two guide seats will be tightened to facilitate puncture. For surface blood vessel puncture, the puncture needle groove of the guide seat can locate and clamp the target blood vessel, so that the puncture section of the target blood vessel is filled with blood flow, which is convenient for puncture.

[0016] Preferably, a guide member for guiding the puncture needle is arranged inside the puncture needle slot, and the angle of the guide member can be adjusted by an adjusting member. The puncture needle fits the guide member, and the angle of the guide member can be adjusted to achieve adjustment of the angle of the puncture needle.

[0017] Preferably, the adjusting member comprises an adjusting stud and an eccentric wheel. The adjusting stud is threadedly connected to the guide seat. The eccentric wheel is located in the puncture needle groove and connected to the adjusting stud. The outer circular end surface of the eccentric wheel supports the guide member. The adjusting stud rotates to drive the eccentric wheel to rotate. The distance between the center of the eccentric wheel and the guide member changes. The guide member rotates around the hinge point, thereby realizing the adjustment of the guide member angle and further realizing the angle adjustment of the puncture needle.

[0018] Compared with the prior art, the present invention has the following beneficial effects: The technical solution of the present invention can guide the puncture needle by setting the structure of the guide seat, and cooperate with the vascular ultrasound probe to make the puncture needle puncture at a suitable position and at a proper angle. At the same time, the guide seat is a detachable connection, and a suitable guide seat can be selected as needed to match puncture needles of different specifications; the adjustable conical cavity structure of the bracket body can be adapted to vascular ultrasound probes of various specifications, and the universality is higher; the protrusion structure is set on the bonding plate, the pressure per unit area can be reduced, and the comfort is improved. At the same time, when the bonding plate is fitted to the patient's skin, the skin between the bonding plates can be tightened to facilitate puncture, and a convex block is set on the bonding plate, and the convex block is engaged with the snap block to connect the bracket body to the vascular ultrasound probe; by setting the structure of the guide member, the puncture needle is fitted with the guide member, and the puncture angle can be adjusted by adjusting the angle of the guide member, which is more practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional schematic diagram of the cooperation between the disposable cartridge-type puncture introducer and the vascular ultrasound probe; Figure 2 This is a partial enlarged schematic diagram of the vascular ultrasound probe; Figure 3 It is a three-dimensional schematic diagram of a disposable cartridge-type puncture introducer; Figure 4 It is a schematic diagram of the main view of a disposable cartridge-type puncture introducer; Figure 5 It is a side view schematic diagram of a disposable cartridge-type puncture introducer; Figure 6 It is a three-dimensional schematic diagram of a guide seat of a disposable cartridge-type puncture introducer; Figure 7 This is a schematic diagram of the separation of the guide seat and the stent body of the disposable cartridge-type puncture introducer; Figure 8 This is an enlarged schematic diagram of the connection between the guide seat and the stent body of the disposable cartridge-type puncture introducer; Fig. 9 It is a top view schematic diagram of the opening of the stent body of the disposable cartridge-type puncture introducer when being adjusted; Fig.10It is a partially cutaway three-dimensional schematic diagram of a guide seat of a disposable cartridge-type puncture introducer; Among them: 1-vascular ultrasound probe, 11-clamping block, 2-bracket body, 21-corner piece, 22-middle piece 1, 23-middle piece 2, 24-locking stud, 25-clip slot, 3-guide seat, 3A-guide seat 1, 3B-guide seat 2, 31-puncture needle slot, 32-puncture guide entrance, β-tilt angle, 34-clip block, 35-guide piece, 36-adjusting piece, 37-adjusting stud, 38-eccentric wheel, 4-fitting plate, 41-protrusion, 42-fixing plate, 43-bump. DETAILED DESCRIPTION

[0020] The following will be combined with the attached embodiment of the present invention Figure 1-10 , the technical solutions in the embodiments of the present invention are described in detail. Example 1

[0021] like Figure 1-6 As shown, the present invention is a disposable cartridge-type puncture guide, comprising a support body 2 and two guide seats 3. The support body 2 is installed on the detection end of the vascular ultrasound probe 1, and then attached to the patient's skin together with the vascular ultrasound probe 1. After the puncture needle is magnetized through the existing device, it is guided by the guide seat 3 and enters the patient's body. In conjunction with the vascular ultrasound probe 1, the entire puncture process can be efficiently completed.

[0022] like Figure 1 and Figure 2 As shown, the vascular ultrasound probe 1 is an existing mature technology. The detection end of the vascular ultrasound probe 1 is in a flat strip shape. The two shorter sides of the vascular ultrasound probe 1 are narrow sides, which are located on the left and right sides respectively, and the two longer sides of the vascular ultrasound probe 1 are wide sides, which are located on the front and back ends respectively.

[0023] Preferably, a snap-fit ​​block 11 is formed on the outer shell of the vascular ultrasound probe 1 and is used to snap-fit ​​with the support body 2 to assist in the connection between the support body 2 and the vascular ultrasound probe 1 .

[0024] like Figure 3-5 As shown, the material of the bracket body 2 is transparent polycarbonate. Compared with the traditional metal bracket, polycarbonate is light in texture and can greatly reduce the weight of the bracket body 2, which is convenient for relevant personnel to operate for a long time. The transparent material is convenient for directly observing the angle of the puncture needle and the blood return after the puncture. At the same time, the material has a certain elastic deformation ability, which is convenient for completing the connection with the relevant structure through its own elastic deformation.

[0025] In this embodiment 1, the bracket body 2 is concave to form a conical cavity, the specifications of the conical cavity match the detection end of the vascular ultrasound probe 1, and the bracket body 2 wraps the detection end of the vascular ultrasound probe 1 from top to bottom through the conical cavity, and the bracket body 2 is stuck on the outer shell of the vascular ultrasound probe 1.

[0026] like Figure 3-5 As shown, the two guide seats 3 are symmetrical to each other, installed on the bracket body 2, and close to the narrow side of the vascular ultrasound probe 1. The guide seat 3 and the bracket body 2 are an integral structure. The guide seat 3 is made of transparent polycarbonate. After the puncture is completed, the completion of the puncture can be judged by directly observing the blood return.

[0027] like Figure 6 As shown, the preferred cross-section of the guide seat 3 is a right-angled trapezoid, the plane where the longer base of the right-angled trapezoid is located is the upper surface, the plane where the shorter base is located is the lower surface, the plane where the hypotenuse is located is the outer surface, and the plane where the high side is located is the inner surface, and the inner surface of the guide seat 3 is in contact with the bracket body 2.

[0028] In this embodiment 1, a puncture needle groove 31 is provided on the guide seat 3, and the puncture needle groove 31 is parallel to the wide side of the vascular ultrasound probe 1. The puncture needle groove 31 extends inward from the upper surface of the guide seat 3. The puncture needle groove 31 is a deep groove and is inclined. The two ports of the puncture needle groove 31 respectively penetrate the upper surface and the outer surface of the guide seat 3.

[0029] In this embodiment 1, the insertion end of the puncture needle slot 31 is located on the outer surface of the guide seat 3, and the insertion end is chamfered to form a circular recessed hole, which is the puncture guide entrance 32, so that the puncture needle can enter the puncture needle slot 31 through the puncture guide entrance 32.

[0030] In the present embodiment 1, the other end of the puncture needle slot 31 is the outlet end of the puncture needle, and the outlet end is located on the upper surface of the guide seat 3 and close to the bracket body 2 .

[0031] In the present embodiment 1, the puncture needle slot 31 is inclined, and the wall surface where the puncture needle slot 31 and the puncture needle are in contact is arc-shaped. When the puncture needle performs puncture, it contacts the arc-shaped wall surface and performs puncture at the angle limited by the inclination of the puncture needle slot 31. It can be understood that: the puncture needle slot 31 is regarded as a whole, which is inclined at a certain angle, and then embedded from the outermost end of the guide seat 3 into the inside of the guide seat 3, and the embedding depth is sufficient, so that both ends of the puncture needle slot 31 meet the above requirements.

[0032] In the present embodiment 1, since the guide seat 3 and the support body 2 are an integral structure and are made of the same material, the relevant operator can slightly adjust the puncture angle through experience and observation to efficiently complete the puncture process.

[0033] In this embodiment 1, when puncturing, the puncture needle enters the puncture needle slot 31 from the puncture guide entrance 32, and then extends from the exit end of the puncture needle slot 31 to enter the target puncture area. After the puncture is completed, the device can be removed as a whole, and the puncture needle slot 31 will not block the puncture needle.

[0034] In this embodiment 1, since the guide seat 3 is symmetrically arranged, according to certain special disease conditions, puncture can be performed from both sides simultaneously to meet the relevant treatment needs.

[0035] Preferably, the puncture needle slot 31 of the guide seat 3 has different diameter specifications to be suitable for puncture needles of different specifications.

[0036] like Figure 4 As shown, the upper surface of the guide seat 3 tilts upward from the side away from the vascular ultrasound probe 1. At this time, an angle is formed between the upper surface of the guide seat 3 and the horizontal plane. The angle is the tilt angle β of the guide seat 3. The tilt angle β is an acute angle and its range is 13°-20°.

[0037] In this embodiment 1, when puncturing, due to the existence of the inclination angle β, when the guide seat 3 is in contact with the patient's skin, the skin between the two guide seats 3, that is, the skin in the target puncture area is tightened, which facilitates the completion of the puncture.

[0038] Preferably, for some surface blood vessel punctures, since the puncture needle groove 31 extends inward from the surface of the guide seat 3, the target blood vessel can be clamped by the puncture needle groove 31 and compressed. While positioning the target blood vessel, the target blood vessel can also be filled with blood, thereby facilitating the puncture.

[0039] like Figure 3-5 As shown, the support body 2 also includes two bonding plates 4, which are symmetrically connected to the support body 2, and the bonding plates 4 are close to the wide side of the vascular ultrasound probe 1. The bonding plates 4 and the support body 2 are an integrated structure. The bonding plates 4 are used to fit the patient's skin, and when external force is applied to the patient's skin, the skin between the bonding plates 4 can be tightened. This part of the skin is located within the cavity projection range of the support body 2, that is, within the detection end projection range of the vascular ultrasound probe 1, which is the target puncture area. After the skin is tightened, it is convenient for puncture.

[0040] In this embodiment 1, a plurality of protrusions 41 are provided on the upper surface of the fitting plate 4. When in use, the protrusions 41 fit against the patient's skin to increase the contact area with the patient's skin, thereby improving the stability of the vascular ultrasound probe 1 and reducing the pressure per unit area and dispersing the weight of the vascular ultrasound probe 1. The friction between the probe and the skin can also be increased to reduce skin sliding, thereby making the skin tight and facilitating puncture.

[0041] Preferably, the protrusion 41 is in the shape of a quadrangular pyramid, which can increase friction while closely contacting the patient's skin, preventing slipping caused by oily skin, and making it impossible to tighten the skin between the two laminating plates 4. In addition, the processing difficulty of the quadrangular pyramid is relatively low.

[0042] like Figure 5 As shown, an integrated fixing plate 42 is provided on the lower surface of the bonding plate 4 , and a bump 43 is protruded outwardly from one side of the fixing plate 42 facing the vascular ultrasound probe 1 .

[0043] In this embodiment 1, the support body 2 is sleeved on the detection end of the vascular ultrasound probe 1 from top to bottom. Since the fixing plate 42 and the support body 2 are an integrated structure and made of the same material, the fixing plate 42 has a certain elastic deformation ability. The protrusion 43 of the fixing plate 42 is initially located above the locking block 11 and gradually approaches the locking block 11 to fit therewith. Then the fixing plate 42 deforms outward, and the protrusion 43 also moves outward. After the protrusion 43 passes over the locking block 11, the fixing plate 42 returns to its original state. At this time, the protrusion 43 is located below the locking block 11 and fits tightly therewith, thereby assisting in fixing the support body 2 and improving stability.

[0044] The method of using the disposable cartridge-type puncture introducer of this embodiment is as follows: First, apply coupling agent to the end of the vascular ultrasound probe 1, and then wrap it with a film, take out a suitable bracket body 2, and clamp it on the end of the vascular ultrasound probe 1 from top to bottom, ensuring that the protrusion 43 is located below the clamping block 11 and fits tightly therewith, and then fit the vascular ultrasound probe 1 with the bracket body 2 installed on the area to be punctured, so that the guide seat 3 and the bonding plate 4 on the bracket body 2 press the patient's skin and make the skin in the puncture area tight.

[0045] Then the puncture needle enters the puncture needle slot 31 through the puncture guide entrance 32, fits the arc-shaped wall of the puncture needle slot 31, extends from the outlet end of the puncture needle slot 31, enters the human body for puncture, and observes the image wirelessly transmitted by the vascular ultrasound probe 1 on the external screen to assist in completing the entire puncture process. After the puncture is completed, the vascular ultrasound probe 1 can be directly removed together with the main body 2. Since the specifications of the puncture needle slot 31 match those of the puncture needle, the puncture needle slot 31 will not become an obstacle, affecting the puncture needle and causing it to deviate, etc. Finally, the bracket body 2 and the film are removed and discarded, and the coupling agent on the vascular ultrasound probe 1 is cleaned and disinfected for next use. Example 2

[0046] like Figure 7 and Figure 8As shown, in this embodiment, based on the embodiment 1, the guide seat 3 and the bracket body 2 are detachably connected, a block 34 is formed on the guide seat 3, and the block 34 is flush with the inner surface of the guide seat 3. A matching slot 25 is provided on the bracket body 2. The guide seat 3 is inserted into the slot 25 through the block 34 and is clamped on the bracket body 2 from top to bottom.

[0047] In the second embodiment, the block 34 and the slot 25 are in interference fit. After the block 34 is inserted into the slot 25, it will not fall off easily due to the friction.

[0048] Preferably, the guide seat 3 is provided with two materials, namely the guide seat 1 3A and the guide seat 2 3B, wherein the guide seat 1 3A is made of transparent polycarbonate, and the guide seat 2 3B is made of a mixture of neodymium iron boron magnetic powder and resin.

[0049] Preferably, the guide seat 3A made of transparent polycarbonate can directly judge the completion of puncture by observing the blood return, and can also directly observe and manually adjust the insertion angle of the puncture needle. This guide seat 3 is suitable for puncture within 5 cm below the skin.

[0050] Preferably, the guide seat 2B made of a mixture of NdFeB magnetic powder and resin can be used to magnetize the puncture needle. The puncture needle enters the puncture needle slot 31 from the puncture guide entrance 32, and then extends from the exit end of the puncture needle slot 31. During this process, the puncture needle is magnetized, and the magnetization direction is the same as the puncture direction, so the puncture needle obtains the highest magnetic performance in the needle insertion direction. There is no need to magnetize the puncture needle in advance through an external device. While receiving the magnetic direction of the puncture needle, the vascular ultrasound probe 1 will display the expected path direction of the puncture needle in a dotted line on the external display screen, which is more intuitive and suitable for punctures above 5 cm below the skin. It can effectively reduce errors and improve the accuracy of puncture.

[0051] In this embodiment 2, the above two types of guide seats 3 are selected for use according to the patient's puncture site and their respective characteristics. Each guide seat 3 is also provided with multiple specifications according to the model of the puncture needle. The puncture needle slots 31 of guide seats 3 of different specifications can adapt to the diameters of puncture needles of different models, and guide seats 3 of different specifications fully cover the models of existing puncture needles.

[0052] In the second embodiment, a guide member 35 may be installed inside the puncture needle slot 31 , and the guide member 35 fits the puncture needle. By adjusting the angle of the guide member 35 , the angle of the puncture needle can be adjusted.

[0053] like Fig.10As shown, the guide member 35 is plate-shaped, and its upper wall is arc-shaped and fits with the puncture needle. The back of the guide member 35 is flat, and the guide member 35 is hinged in the puncture needle slot 31. Specifically, the hinge axis is parallel to the narrow side of the vascular ultrasound probe 1, installed inside the guide seat 3, and the hinge axis passes through the puncture needle slot 31, and one end of the guide member 35 is rotatably connected to the hinge axis.

[0054] In this embodiment 2, the guide member 35 can rotate around the hinge point in the puncture needle slot 31. It should be noted that during the rotation of the guide member 35, the end away from the hinge point is always located in the puncture needle slot 31, so as to avoid the end of the guide member 35 protruding from the edge of the puncture needle slot 35 when the guide member 35 is fitted to the patient's puncture site, squeezing the patient and causing discomfort.

[0055] In this embodiment 2, the guide member 35 is adjusted in angle by the adjusting member 36. The adjusting member 36 includes an adjusting stud 37 and an eccentric wheel 38. The adjusting stud 37 is threadedly connected to the guide seat 3. One end of the adjusting stud 37 extends into the puncture needle groove 31 and is fixedly connected to the eccentric wheel 38. The other end of the adjusting stud 37 is located outside the guide seat 3.

[0056] Preferably, the outer circular end surface of the eccentric wheel 38 holds up the guide member 35 , that is, the eccentric wheel 38 is in contact with the back of the guide member 35 , and the eccentric wheel 38 is away from one end of the hinge point of the guide member 35 .

[0057] In the second embodiment, the rotation of the eccentric wheel 38 will drive the angle of the guide member 35 to change, thereby adjusting the insertion angle of the puncture needle. Specifically, since the eccentric wheel 38 is not concentric with the adjustment stud 37, when the adjustment stud 37 is rotated, the eccentric wheel 38 rotates together with it. At this time, the distance between the center of the eccentric wheel 38 and the guide member 35 changes all the time, and the guide member 35 rotates around the hinge point as the distance changes, thereby adjusting the angle of the guide member 35. It should be noted that the contact part between the eccentric wheel 38 and the guide member 35 is located at the end of the guide member 35 away from the hinge point, so that the angle of the guide member 35 can be changed.

[0058] In the second embodiment, since the guide member 35 is only fitted with the eccentric wheel 38 and is not fixed, after the angle of the guide member 35 is adjusted by the adjusting member 36, the guide member 35 can still continue to change its angle to the maximum limit. The adjusting member 36 adjusts the angle of the guide member 35, which is equivalent to changing the angle adjustment range of the guide member 35. The lower limit of the angle adjustment range is the required angle. When in use, since the puncture needle needs to fit the guide member 35 during puncture, some external force will be applied to the guide member 35, and the guide member 35 will remain in contact with the eccentric wheel 38 to perform puncture at the required angle.

[0059] Preferably, the guide member 35 and the puncture needle slot 31 can be set to an interference fit, and the friction can be increased so that the guide member 35 remains stationary after adjustment. At this time, it should be noted that when adjusting the guide member 35, it needs to be precise and not over-adjusted. Once it is over-adjusted and needs to be adjusted back, the guide member 35 will be fixed here and cannot be automatically adjusted back. A little external force needs to be applied to make the guide member 35 return to fit the eccentric wheel 38.

[0060] Preferably, since the guide member 35 is hinged, a torsion spring can be installed on the hinge shaft of the guide member 35. Through the action of the torsion spring, the guide member 35 is subjected to external force and is always in contact with the eccentric wheel 38. In this way, after the angle of the guide member 35 is adjusted by the adjusting member 36, the guide member 35 will not automatically rotate around the hinge shaft, and it can also support callback. When the guide member 35 is over-adjusted and called back, it will automatically callback and always keep in contact with the eccentric wheel 38. However, this method requires a higher manufacturing process.

[0061] In this embodiment 2, the eccentric wheel 38 is fixedly connected to the adjusting stud 37, and the adjusting stud 37 is connected by a thread. When the adjusting stud 37 rotates, it will move forward one end of the stroke. Therefore, the eccentric wheel 38 also needs to have a certain stroke distance in the puncture needle slot 31, that is, the thickness of the eccentric wheel 38 is smaller than the distance between the two sides of the puncture needle slot 31.

[0062] In this embodiment 2, the adjusting member 36 adjusts the angle of the guide member 35 by changing the distance between the center of the eccentric wheel 38 and the guide member 35, and the eccentric wheel 38 rotates half a circle to change the distance between it and the guide member 35 from the minimum to the maximum range. Therefore, the forward stroke of the adjusting stud 37 after rotating half a circle is equal to the movable distance of the eccentric wheel 38 between the puncture needle slots 31.

[0063] For example, initially, one end face of the eccentric wheel 38 is in contact with one side of the puncture needle slot 31, and the distance between the other end face of the eccentric wheel 38 and the other side of the puncture needle slot 31 is h, so the travel of the adjusting stud 37 after rotating half a circle is also h.

[0064] In the second embodiment, the angle of the guide member 35 can be adjusted by rotating the adjusting screw 37 . When the adjustment transition needs to be adjusted back, it is only necessary to rotate the adjusting screw 37 in the reverse direction.

[0065] Preferably, the outer surface of the guide seat 3 is provided with commonly used puncture angle scale lines, and when adjusting the angle of the guide member 35, the scale lines can be directly observed to assist in the adjustment. Example 3

[0066] like Fig. 9As shown, in this embodiment, based on the embodiment 2, the size of the conical cavity of the support body 2 can be adjusted according to the specifications of the detection end of the vascular ultrasound probe 1 to be suitable for vascular ultrasound probes 1 of various specifications.

[0067] In this embodiment 3, the bracket body 2 includes multiple bracket plates, and the bracket plates are of three types, including four corner pieces 21, two middle pieces 1 22 and two middle pieces 23, wherein: the guide seat 3 is installed on the middle piece 1 22, and the bonding plate 4 is installed on the middle piece 23.

[0068] In this embodiment 3, every two adjacent bracket plates are movably connected, specifically: four corner pieces 21 are respectively located at four corners, two middle pieces 1 22 are respectively located at two narrow sides of the vascular ultrasound probe 1, and two middle pieces 23 are respectively located at two wide sides of the vascular ultrasound probe 1. Both ends of the middle pieces 1 22 and 23 are fixed with protruding guide columns, and both ends of the corner piece 21 are provided with guide grooves matching therewith, and the guide columns are inserted into the guide grooves. The corner pieces 21, the middle pieces 1 22 and the middle pieces 2 23 are movably connected through the cooperation of the guide columns and the guide grooves.

[0069] In this embodiment 3, the bracket body 2 is surrounded by a plurality of bracket plates to form a conical cavity, and an adjustment mechanism for adjusting the size of the conical cavity is arranged on the bracket plates. The movable distance of the bracket plates can be adjusted by the adjustment mechanism, thereby realizing the adjustment of the size of the conical cavity. Specifically, the adjustment mechanism is to form a fixed block on the middle piece 1 22 and the middle piece 2 23, and the middle rotation of the locking stud 24 is connected to the fixed block. The locking stud 24 is threadedly connected to the two adjacent corner pieces 21. A locking block can be formed by protruding on the two adjacent corner pieces 21, and the locking stud 24 is threadedly connected to the locking block, thereby realizing a threaded connection with the corner piece 21.

[0070] In this embodiment 3, the threads at both ends of the locking stud 24 are opposite, so when the locking stud 24 rotates, it can drive the corner pieces 21 at both ends to move relative or toward each other at the same time, and it should be noted that the locking studs 24 are all installed at the lower part of the bracket body 2, so the locking studs 24 will not affect the normal operation of other structures, especially for the middle piece 22, the locking studs 24 will not block the puncture needle slot 31 and the puncture guide entrance 32.

[0071] In the present embodiment 3, four adjustment mechanisms may be provided, and two of them are parallel to each other. In this case, the parallel adjustment mechanisms need to be adjusted at the same time, otherwise they cannot be adjusted normally and may even be damaged.

[0072] Preferably, the number of adjustment mechanisms can be reduced to two, and the bracket plates parallel to each other can be adjusted by one adjustment mechanism, which can reduce trouble and make operation more convenient.

[0073] Preferably, when the movable distance of the bracket plates is adjusted by the locking studs 24, the maximum sliding distance between two adjacent bracket plates does not exceed the length of the guide column, so the two adjacent bracket plates will not slip off and always remain connected.

[0074] Preferably, for the middle piece 22, the corner pieces 21 at both ends move relative to or toward each other at the same time, which can ensure that the position of the guide seat 3 remains unchanged. In this way, when the puncture needle passes through the puncture needle slot 31 for puncture, the puncture needle is always located within the projection range of the detection end of the vascular ultrasound probe 1, and the puncture needle image display will not deviate.

[0075] In this embodiment 3, since the size of the conical space of the bracket body 2 is adjustable and cannot be fixed only by snapping, the bracket body 2 needs to be fitted with the snapping block 11 through the protrusion 43 on the fixing plate 42 to achieve the fixation of the bracket body 2 and the vascular ultrasound probe 1.

[0076] Preferably, for the middle piece 23, the corner pieces 21 at both ends move relative to or toward each other at the same time, so that the bonding plate 4 is always located in the middle position, so that the fixing plate 42 on its lower surface is also located in the middle and will not be biased to one side, ensuring that the protrusion 43 on the fixing plate 42 can fit with the locking block 11 on the vascular ultrasound probe 1, fix the bracket body 2, improve its stability, and thereby improve the puncture stability and success rate.

[0077] Preferably, both ends of the locking stud 24 extend out of the corner pieces 21, and a dovetail is provided at one end thereof for easy manual operation. The locking stud 24 is rotated to drive the corner pieces 21 on both sides to move.

[0078] In this embodiment 3, the method for adjusting the size of the conical space of the bracket body 2 is: first, preliminarily adjust the two locking studs 24 according to the specifications of the detection end of the vascular ultrasound probe 1, so that the conical space of the bracket body 2 is slightly larger than the detection end of the vascular ultrasound probe 1, and then put the bracket body 1 on the detection end of the vascular ultrasound probe 1, and ensure that the protrusion 43 is located below the locking block 11, that is, the upper surface of the protrusion 43 is opposite to the upper surface of the locking block 11.

[0079] Furthermore, the distance between adjacent bracket plates is further reduced by locking the studs 24, and the conical space enclosed by the bracket plates gradually becomes smaller. During this process, the bracket plates need to fit the detection end of the vascular ultrasound probe 1, and due to the conical space, the bracket plates will also move upward until the upper surface of the protrusion 43 fits tightly with the lower surface of the locking block 11. At this time, the conical space of the bracket body 2 is adjusted, and the protrusion 43 and the locking block 11 fit tightly with each other, so that the bracket body 2 and the vascular ultrasound probe 1 are clamped and fixed.

[0080] In the present embodiment 3, the conical space of the support body 2 matches the detection end of the vascular ultrasound probe 1 , and the support body 2 and the detection end of the vascular ultrasound probe 1 are tightly fitted.

[0081] The above embodiments are only for illustrating the technical idea of ​​the present invention, and cannot be used to limit the protection scope of the present invention. Any changes made on the basis of the technical solution in accordance with the technical idea proposed by the present invention shall fall within the protection scope of the present invention.

Claims

1. A disposable cartridge-type puncture introducer, characterized in that: The invention comprises a support body (2) and two guide seats (3); the support body (2) is detachably arranged on the outer shell of the vascular ultrasound probe (1); the support body (2) is located at the detection end of the vascular ultrasound probe (1); the two guide seats (3) are symmetrically arranged on the support body (2); a puncture needle slot (31) for guiding the puncture needle to enter is arranged on the guide seat (3); a puncture guide entrance (32) is arranged at the insertion end of the puncture needle slot (31); the puncture guide entrance (32) is a circular hole; the support body (2) is made of transparent polycarbonate.

2. The disposable cartridge-type puncture introducer according to claim 1, characterized in that: The support body (2) is provided with a conical cavity for wrapping the detection end of the vascular ultrasound probe (1), and the size of the conical cavity of the support body (2) is adjustable.

3. The disposable cartridge-type puncture introducer according to claim 2, characterized in that: The support body (2) comprises a plurality of support plates, each two adjacent support plates are movably connected, the plurality of support plates enclose a conical cavity, and an adjustment mechanism for adjusting the size of the conical cavity is arranged on the support plates.

4. The disposable cartridge-type puncture introducer according to claim 3, characterized in that: The adjustment mechanism comprises a locking stud (24), which is rotatably connected to the bracket plate and is threadedly connected to two bracket plates adjacent to the bracket plate, and the threads at both ends of the locking stud (24) are opposite.

5. The disposable cartridge-type puncture introducer according to claim 1, characterized in that: The support body (2) further comprises two bonding plates (4) for closely contacting the skin, the two bonding plates (4) being symmetrically arranged on the support body (2), the symmetry axes of the bonding plates (4) being perpendicular to the symmetry axes of the guide seat (3), a plurality of protrusions (41) being arranged on the upper surface of the bonding plates (4), a fixing plate (42) being arranged on the lower surface of the bonding plates (4), and a protrusion (43) being arranged on the fixing plate (42) for cooperating with a snap-fit ​​block (11) on the vascular ultrasound probe (1).

6. The disposable cartridge-type puncture introducer according to claim 1, characterized in that: The guide seat (3) is made of transparent polycarbonate or resin containing neodymium iron boron magnetic powder.

7. The disposable cartridge-type puncture introducer according to claim 1, characterized in that: A clamping block (34) is provided on the guide seat (3), and the guide seat (3) and the bracket body (2) are clamped together via the clamping block (34).

8. The disposable cartridge-type puncture introducer according to claim 1, characterized in that: The end of the guide seat (3) away from the vascular ultrasound probe (1) is tilted upwards and forms an inclination angle β with the horizontal plane. The inclination angle β is in the range of 13°-20°.

9. The disposable cartridge-type puncture introducer according to claim 1, characterized in that: A guide member (35) for guiding the puncture needle is disposed inside the puncture needle slot (31), and the angle of the guide member (35) can be adjusted by an adjustment member (36).

10. The disposable cartridge-type puncture introducer according to claim 9, characterized in that: The adjusting member (36) comprises an adjusting stud (37) and an eccentric wheel (38), wherein the adjusting stud (37) is threadedly connected to the guide seat (3), the eccentric wheel (38) is located in the puncture needle groove (31) and connected to the adjusting stud (37), and the outer circular end surface of the eccentric wheel (38) supports the guide member (35).

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