Piercing device

Abstract

The present application provides a kind of puncture device, easy to use, simple operation.The puncture device includes needle sheath and guide wire, the puncture assembly includes needle sheath and guide wire, wherein the needle sheath is cylindrical, the front end of the needle sheath is provided with hollow cone, the cone is used as needle tip, the conical wall of the cone is provided with opening;The guide wire is arranged in the needle sheath, and the front end of the guide wire is provided with plug, the plug can be matched with the opening on the cone and close the opening, the plug is elastic, the plug can pass through the opening after elastic deformation.

Description

Technical Field

[0001] This invention relates to the field of medical devices, and more specifically, to a puncture device. Background Technology

[0002] Kidney stones are a common and frequently occurring disease in urology. Percutaneous nephrolithotomy (PCNL) is an important method for treating kidney stones. The most crucial surgical step during PCNL is creating a renal fistula using a renal biopsy device, and this is also where surgical complications are most likely to occur.

[0003] Existing puncture devices include a cylindrical outer sheath, a core rod inserted within the sheath, and a guide wire. The core rod has a tapered needle tip at its front end, which extends beyond the front end of the sheath to facilitate insertion into the designated patient site. In use, the fitted outer sheath and core rod are inserted into the designated site, the core rod is removed, and the guide wire is inserted from the outer sheath into the designated site. The outer sheath is then removed, creating a channel within the patient's body. If channel enlargement is required, a fascial reamer with a larger diameter than the outer sheath is placed over the guide wire and inserted into the designated site. This reamer is then removed, and an even larger diameter fascial reamer is placed over the guide wire and inserted into the designated site. This process is repeated until a channel of sufficient size is formed. These existing puncture devices require multiple insertion and removal actions, making the operation cumbersome. Summary of the Invention

[0004] The main objective of this invention is to overcome at least one of the defects of the prior art and provide a puncture device that is convenient to use and simple to operate.

[0005] According to one aspect of the present invention, a puncture device includes a needle sheath and a guide wire. The puncture assembly includes a needle sheath and a guide wire, wherein the needle sheath is cylindrical, and the front end of the needle sheath is provided with a hollow cone, the cone serving as a needle tip, and an opening is provided on the cone wall; the guide wire is inserted into the needle sheath, and the front end of the guide wire is provided with a plug, the plug being able to engage with and close the opening on the cone, the plug being elastic, and after elastic deformation, the plug being able to pass through the opening.

[0006] According to some embodiments of the present invention, the plug is disposed on the side of the guidewire.

[0007] According to some embodiments of the present invention, a groove is provided between the plug and the guide wire; or the top surface of the plug is a plane perpendicular to the guide wire.

[0008] According to some embodiments of the present invention, the outer surface of the front end of the plug is a smooth transition surface; the plug is made of a soft material, such as rubber.

[0009] According to some embodiments of the present invention, a guide slide is provided inside the cone below the plug, the guide slide having a starting end and an ending end, the ending end being connected to the lower edge of the opening, and the starting end being higher than the ending end in the axial direction along the needle sheath.

[0010] According to some embodiments of the present invention, the section from the guide slide to the front end of the cone is a solid structure.

[0011] According to some embodiments of the present invention, the puncture assembly further includes a support rod that passes through the needle sheath, wherein the sum of the cross-sectional areas of the support rod and the guide wire is less than the cross-sectional area of ​​the needle sheath, thereby forming a medium channel within the needle sheath.

[0012] According to some embodiments of the present invention, a negative pressure device is also included, which includes a negative pressure tube and a sealing joint, the sealing joint being installed at the rear end of the needle sheath; one end of the negative pressure tube is connected to the sealing joint, and the other end of the negative pressure tube is connected to a negative pressure source, thereby enabling the medium channel inside the needle sheath to communicate with the negative pressure tube; a through hole is provided on the conical wall of the cone.

[0013] According to some embodiments of the present invention, a hole-expanding assembly is also included, the hole-expanding assembly comprising at least one hole-expanding tube with progressively increasing diameters, each hole-expanding tube having a hollow frustum-shaped guide portion at its front end, the diameter of the hole-expanding tube with the smallest diameter being larger than the diameter of the needle sheath.

[0014] According to some embodiments of the present invention, an airbag is provided around the outside of the at least one expanding tube with the largest diameter.

[0015] As can be seen from the above technical solution, the advantages and positive effects of the present invention are as follows:

[0016] The puncture device proposed in this invention may consist only of a needle sheath and a guidewire disposed within the needle sheath. The front end of the needle sheath has a hollow cone serving as a needle tip, and the cone wall has an opening. The front end of the guidewire has a plug that can seal the opening. In use, the plug at the front end of the guidewire is aligned with the opening on the needle tip of the needle sheath to prevent soft tissue from entering the needle sheath during the insertion into the designated site of the patient. After the designated site is punctured, when the needle sheath is removed, the plug at the front end of the guidewire deforms under force, allowing it to pass through the opening and remain in the designated site.

[0017] The puncture device proposed in this invention features a guidewire with a plug and a needle sheath with a needle tip and an opening. The plug and opening work together to allow for easy insertion into the patient's designated site. The elastic deformation of the plug through the opening secures the guidewire in place at the designated site. This puncture device requires only a single insertion to place the guidewire at the desired location. Therefore, the puncture device proposed in this invention is convenient to use and simple to operate. Attached Figure Description

[0018] Various objects, features, and advantages of the invention will become more apparent from the following detailed description of preferred embodiments of the invention, taken in conjunction with the accompanying drawings. The drawings are merely illustrative of the invention and are not necessarily drawn to scale. In the drawings, the same reference numerals always denote the same or similar parts. Wherein:

[0019] Figure 1 This is a three-dimensional structural schematic diagram of an embodiment of the puncture device of the present invention;

[0020] Figure 2 This is a partially enlarged view of the puncture component in an embodiment of the puncture device of the present invention;

[0021] Figure 3 This is a three-dimensional exploded view of the puncture component in an embodiment of the puncture device of the present invention;

[0022] Figure 4 yes Figure 3 Enlarged view of section A;

[0023] Figure 5 A three-dimensional structural diagram of the plug in the puncture assembly is shown, viewed from one angle.

[0024] Figure 6 A three-dimensional structural diagram of the plug in the puncture assembly, viewed from another angle;

[0025] Figure 7 A cross-sectional schematic diagram of the needle sheath and cone in the puncture assembly is shown;

[0026] Figure 8 A schematic diagram of the pore-expanding assembly with an airbag in this invention is shown. Detailed Implementation

[0027] Typical embodiments embodying the features and advantages of the present invention will be described in detail in the following description. It should be understood that the present invention can have various variations in different embodiments without departing from the scope of the present invention, and the description and drawings therein are for illustrative purposes only and not intended to limit the present invention.

[0028] In the following description of various exemplary embodiments of the invention, reference is made to the accompanying drawings, which form part of the invention, and in which different exemplary structures, systems, and steps that can implement various aspects of the invention are shown by way of example. It should be understood that other specific solutions to components, structures, exemplary devices, systems, and steps may be used, and structural and functional modifications may be made without departing from the scope of the invention. When describing the elements / components / etc. described and / or illustrated herein, the terms "comprising," "including," and "having" are used to mean an open-ended inclusion and that additional elements / components / etc. may exist in addition to those listed.

[0029] Relative terms such as “down” or “bottom” and “up” or “top” may be used herein to describe the relationship of one element to another, as illustrated in the figures. It should be understood that relative terms are intended to include different orientations of the device beyond those shown in the figures. For example, if a device in one of the figures is flipped, an element described as “down” or “bottom” of another element will be oriented “up” or “top” of that element. Thus, the exemplary term “down” can include both “down” and “up” orientations, and the term “bottom” can include both “bottom” and “top” orientations, depending on the specific orientation of the figure. Similarly, if a device in one of the figures is flipped, an element described as “down” or “bottom” of another element will be oriented “up” or “top” of that element. Thus, the exemplary term “bottom” or “below” can include both “up” and “down” orientations.

[0030] like Figure 1 As shown, an embodiment of the puncture device provided by the present invention includes a puncture component 100 and a reaming component 200. In some other embodiments, such as when the physician is experienced enough to form a sufficiently large pore in one go, or when only the sample needs to be obtained without reaming, the puncture device may include only the puncture component 100 and not the reaming component 200.

[0031] like Figure 2 , Figure 3 and Figure 4 As shown, the puncture assembly 100 includes a needle sheath 1, a guide wire 2, and a support rod 3. The needle sheath 1 is cylindrical, and its front end has a hollow cone 11. The maximum diameter of the cone 11 is the same as the diameter of the needle sheath 1. The cone 11 and the needle sheath 1 are smoothly and fixedly connected together, or the two are integrally formed. The cone 11 can be used as a needle tip to facilitate easy and effortless insertion into the patient's soft tissue.

[0032] like Figure 4As shown, the hollow cone 11 has an opening 110 on its cone wall, which is adjacent to the needle sheath 1. The cone 11 has a through hole 113 on its cone wall, which can be located opposite the opening 110, but is not limited to this.

[0033] The guidewire 2 is inserted into the needle sheath 1, and the front end of the guidewire 2 is provided with a plug 21. The plug 21 is elastic, for example, the plug 21 can be made of rubber material. The outer surface of the front end of the plug 21 is a smooth transition surface, which can effectively prevent damage to human tissue. The plug 21 can cooperate with and close the opening 110 on the cone 11. After elastic deformation, the plug 21 can pass through the opening 110.

[0034] The support rod 3 can be a slender rod that passes through the needle sheath 1. One side of the support rod 3 abuts against the inner wall of the needle sheath 1, and the other side abuts against the guide wire 2, thereby making the plug 21 at the front end of the guide wire 2 more firmly seal the opening 110. Of course, in some other embodiments, for example, when the rigidity of the front part of the guide wire 2 is large, the puncture assembly 100 may not include the support rod 3. In this case, the plug 21 at the front end of the guide wire 2 can still firmly seal the opening 110.

[0035] The sum of the cross-sectional area of ​​the support rod 3 and the cross-sectional area of ​​the guide wire 2 is less than the cross-sectional area of ​​the needle sheath 1, thereby forming a medium channel in the needle sheath 1 for the flow of fluid media such as liquids or gases.

[0036] like Figure 5 and Figure 6 As shown, in one embodiment, the plug 21 is disposed on the side of the guide wire 2, and a groove 210 is provided between the plug 21 and the guide wire 2; in another embodiment, the top surface of the plug 21 is a plane 211 perpendicular to the guide wire 2. When a reaming operation is required, the front end of the reaming tube can be inserted into the groove 210 or abut against the plane 211, thereby preventing the reaming tube from being over-inserted and damaging human tissue.

[0037] See Figure 7 The cone 11 has a guide slide 111 located below the plug 21. The guide slide 111 has a starting end and a ending end. The ending end is connected to the lower edge of the opening 110, and the starting end can be on the cone 11 opposite the ending end. Along the axial direction of the needle sheath 1, the starting end is higher than the ending end. The guide slide 111 can be arc-shaped. The area enclosed by the guide slide 111 and the tip of the cone 11 can be made into a solid structure. This facilitates manufacturing and strengthens the tip of the cone 11, making it less prone to deformation during puncture.

[0038] Furthermore, such as Figure 1As shown, the puncture device of the present invention may further include a negative pressure device 4, which includes a negative pressure tube 41 and a sealing connector 42. The negative pressure tube 41 may be a transparent tube made of transparent plastic or the like for easy observation. One end of the negative pressure tube 41 is connected to the sealing connector 42, and the other end is connected to a negative pressure source 43. The sealing connector 42 is installed at the rear end of the needle sheath 1, thereby connecting the medium channel inside the needle sheath 1 with the negative pressure tube 41.

[0039] The following describes the use of the puncture device of the present invention using a renal biopsy as an example. The plug 21 at the tip of the guidewire 2 is aligned with the opening 110 on the cone 11 of the needle sheath 1, which serves as the needle tip, and the two are inserted into the patient's soft tissue. Simultaneously, the negative pressure device is activated. When urine is observed in the negative pressure tube 41, it indicates that the needle tip of the needle sheath 1 has reached the designated site, such as the renal pelvis, and the puncture can be stopped. Therefore, the puncture device of the present invention, through the setting of the negative pressure device, can accurately determine whether the needle tip of the needle sheath 1 has reached the designated site, effectively preventing over-puncture and damage. When the needle tip of the needle sheath 1 has reached the designated site, during the process of pulling the needle sheath 1 outward, the plug 21 at the tip of the guidewire 2 deforms under force, passing through the opening 110, and can remain in the patient's body for subsequent use.

[0040] like Figure 1 As shown, the reaming assembly 200 in the puncture device of the present invention includes at least one reaming tube 5 with progressively increasing diameters. Figure 1 Five expanding tubes 5 are shown. In practical applications, the number of expanding tubes 5 can be appropriately determined according to the required channel diameter, such as 1, 2, 3, 8, etc. Among these expanding tubes 5, the diameter of the smallest expanding tube 5 is larger than the diameter of the needle sheath 1. The structure of the expanding tube 5 is similar to that of the needle sheath 1, including a round tube with a hollow frustum-shaped guide portion 51 at the front end of the round tube.

[0041] When a hole enlargement operation is required, after the needle sheath 1 is pulled out, insert the smaller diameter enlargement tube 5 along the guide wire 2 until the guide part 51 at the front end of the enlargement tube 5 is inserted into the groove 210 of the plug 21 or abuts against the plane 211 of the plug 21. Then remove the smaller diameter enlargement tube 5, insert the slightly larger diameter enlargement tube 5, and pull it out. Repeat this process of replacing the enlargement tube 5 with increasingly larger diameter tubes until a sufficiently large hole is obtained.

[0042] like Figure 8 As shown, in the reaming assembly 200 of this invention, an airbag 6 is arranged around the outside of the reaming tube 5 with the largest diameter. The airbag 6 can be connected to an inflation device. After the reaming operation is completed, air is inflated into the airbag 6. The increased volume of the airbag 6 will compress the soft tissue 300 around the orifice, which helps to reduce tissue bleeding and also helps to prevent the puncture device from accidentally dislodging.

[0043] The specific application of the puncture device of this invention can be as a renal puncture device, for example, to safely establish a renal access for lithotripsy and stone removal. The cone 11 used as the needle tip has a through hole 113 on its side, and a negative pressure device 4 verifies whether the needle tip has correctly entered the renal pelvis. After puncturing into the renal pelvis, the needle sheath 1 is withdrawn, and the plug 21 (rubber soft tip) at the front end of the guidewire 2 can deform, facilitating the withdrawal of the needle sheath 1. Simultaneously, during subsequent expansion of the renal access, the plug 21 can prevent penetration of the contralateral renal tissue, thus avoiding excessively deep puncture. After the guidewire 2 is placed, the dilator tube 5 gradually expands the diameter of the renal access; an air balloon 6 is attached to the outside of the last dilator tube 5 to fix the access and prevent bleeding and dislodgement of the working access. Using the puncture device of this invention simplifies the surgical procedure and increases the safety of the surgical operation.

[0044] The exemplary embodiments of the puncture device and variable frequency ultrasound-assisted processing device proposed in this invention have been described and / or illustrated in detail above. However, the embodiments of this invention are not limited to the specific embodiments described herein; rather, components of each embodiment may be used independently and separately from other components described herein. Each component of one embodiment may also be used in combination with other components of other embodiments. In the description of this specification, the terms "one embodiment," "some embodiments," "other embodiments," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the claims. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

Claims

1. A lancing device, comprising: The puncture assembly comprises a needle sheath and a guide wire, wherein the needle sheath is cylindrical, the front end of the needle sheath is provided with a hollow cone serving as a needle tip, and the cone wall of the cone is provided with an opening; the guide wire is arranged in the needle sheath, and the front end of the guide wire is provided with a plug capable of cooperating with the opening on the cone and closing the opening, the plug is elastic, and the plug can pass through the opening after elastic deformation; the puncture assembly further comprises a support rod arranged in the needle sheath, the plug at the front end of the guide wire is matched with the opening on the needle tip of the needle sheath during use, and soft tissue is prevented from entering the needle sheath during puncture into a specified part of a patient; when the needle sheath is removed after puncture into the specified part, the plug at the front end of the guide wire is deformed under stress, and then can pass through the opening and be left in the specified part.

2. The lancing device of claim 1, wherein, The plug is arranged on the side of the guide wire.

3. The lancing device of claim 2, wherein the lancet is configured to be moved from the first position to the second position by a user. A groove is arranged between the plug and the guide wire; or the top end surface of the plug is a plane perpendicular to the guide wire.

4. The lancing device of claim 1, wherein the lancet is configured to be inserted into the skin of a user to a depth of about 0.1 mm to about 1.5 mm. The front end surface of the plug is a smooth transition surface; and the plug is made of rubber material.

5. The lancing device of claim 1, wherein the lancet is configured to be inserted into the skin of a user to a depth of about 0.1 mm to about 1.5 mm. A guide slide is arranged inside the cone below the plug, the guide slide has a starting end and an end, the end is connected to the lower edge of the opening, and the starting end is higher than the end in the axial direction of the needle sheath.

6. The lancing device of claim 5, wherein the lancet is configured to be moved from the first position to the second position by a user. The front end of the cone from the guide slide is a solid structure.

7. The lancing device of claim 1, wherein the lancet is configured to be inserted into the skin of a user to a depth of about 0.1 mm to about 1.5 mm. The sum of the cross-sectional areas of the support rod and the guide wire is less than the cross-sectional area of the needle sheath, so that a medium channel is formed in the needle sheath.

8. The lancing device of any one of claims 1-7, wherein, A negative pressure device is further included, which comprises a negative pressure tube and a sealing joint, the sealing joint is mounted to the rear end of the needle sheath; one end of the negative pressure tube is connected to the sealing joint, the other end of the negative pressure tube is in communication with a negative pressure source, so that the medium channel in the needle sheath is in communication with the negative pressure tube; and a through hole is arranged on the cone wall of the cone.

9. The lancing device of any one of claims 1-7, wherein, A reaming assembly is further included, which comprises at least one reaming tube with increasing diameters in sequence, the front end of each reaming tube has a hollow conical frustum-shaped guide part, and the diameter of the reaming tube with the smallest diameter is greater than the diameter of the needle sheath.

10. The lancing device of claim 9, wherein the lancet is configured to be moved from the first position to the second position by a user. The outer surface of the reaming tube with the largest diameter among the at least one reaming tube is surrounded by an air bag.

Images