In-vivo image acquisition device with guiding structure, system and preparation method

Abstract

The present application provides an in vivo image acquisition device, system and preparation method with a guiding structure, including a catheter housing, having a collection component placement cavity and a guide wire guiding cavity that do not interfere with each other; an image acquisition component, which is arranged at the distal end of the collection component placement cavity, for acquiring tissue images outside the catheter housing and generating image signals, and a cable connecting opening is arranged at the proximal end of the collection component placement cavity; the guide wire guiding cavity is provided with a first opening at the distal end of the catheter housing, and a second opening connected to the first opening is arranged on the side wall of the catheter housing, and a blocking side wall is arranged on the proximal side of the second opening, and the blocking side wall is integrally formed with the outer side wall of the catheter housing and is relatively inclined. The structural optimization of the catheter housing is used to achieve rapid positioning in conjunction with the guide wire, and the compactness of the structure is ensured. The structure can simplify the processing process and effectively utilize the material of the device itself to achieve the guidance and limitation of the guide wire.

Description

Technical Field

[0001] The present invention relates to a medical device, and in particular to an in-vivo image acquisition device with a guiding structure, a system and a preparation method. Background Art

[0002] During surgery, many situations require the insertion of instruments into the patient's body through natural or artificial openings. For example, inserting a needle in a biopsy (to collect a sample), inserting a catheter in brachytherapy (to place radioactive seeds), or in other targeted treatments such as cryotherapy or laser therapy.

[0003] With the advancement of science and technology, the application of ultrasound in the medical field has been continuously developing, serving more clinical diagnosis and treatment. Among them, ultrasound guidance technology is developed on the basis of ultrasound imaging. Under the monitoring or guidance of real-time ultrasound, biopsy, fluid extraction, puncture, injection of drugs, blood transfusion and other operations can be completed, which can avoid certain surgical operations and achieve the same effect as surgical operations.

[0004] Ultrasound-guided minimally invasive intervention is a new trend in pain treatment. It uses ultrasound to guide precise punctures at the painful site, and then slowly injects drugs to block the conduction pathway of pain, interrupt the vicious cycle of pain, or improve blood circulation around nerves. This treatment method is fast-acting and highly controllable. However, due to the complexity of human body channels, it is necessary to guide the ultrasound probe to the specified position through a positioning guidewire. However, when guiding the guidewire, an additional guide channel dedicated to the guidewire needs to be set on the ultrasound probe. The guidewire channel setting will complicate the overall structure of the ultrasound detection device, and since the overall outer diameter of the ultrasound detection device is small, the processing of the ultrasound detection device including the guidewire channel will also be difficult. Summary of the invention

[0005] The technical solution of the present invention is implemented as follows: an in vivo image acquisition device with a guiding structure, comprising:

[0006] A catheter housing, wherein the catheter housing has a collection component placement cavity and a guidewire guiding cavity that do not interfere with each other;

[0007] An image acquisition component is disposed at the distal end of the acquisition component placement cavity, and is used to acquire an image of tissue outside the catheter housing and generate an image signal. A cable communication opening is provided at the proximal end of the acquisition component placement cavity;

[0008] The guidewire guiding cavity is provided with a first opening at the distal end of the catheter housing, and a second opening connected to the first opening is provided on the side wall of the catheter housing, and a blocking side wall is provided on the proximal side of the second opening. The blocking side wall is integrally formed with the outer side wall of the catheter housing and is relatively inclined.

[0009] Furthermore, the image acquisition component includes a single-board ultrasonic observation part, and the single-board ultrasonic observation part is fixed to the far end of the acquisition component placement cavity by an adhesive.

[0010] Furthermore, the proximal end of the single-board ultrasonic observation portion is electrically connected to one end of a signal transmission cable, and the other end of the signal transmission cable passes through the cable communication opening for electrical connection to the ultrasonic connector.

[0011] Furthermore, the blocking side wall is obtained by partially cutting the outer side wall of the catheter housing and then bending it inwards.

[0012] Furthermore, the catheter housing is made of a polymer material, and the blocking side wall is formed by thermoplastic molding so that it is bent relative to the outer side wall of the catheter housing.

[0013] Furthermore, the length of the blocking side wall is greater than the inner diameter of the guide wire guiding cavity.

[0014] Furthermore, the distal end of the blocking side wall abuts against the inner wall of the guidewire guiding cavity.

[0015] Furthermore, it also includes a wire escape groove that penetrates the outer wall of the catheter housing and communicates with the guidewire guide cavity, the width of the wire escape groove is smaller than the inner diameter of the guidewire guide cavity, and the wire escape groove is respectively connected to the first opening and the second opening.

[0016] In addition, an in-vivo image acquisition system is also provided, comprising an ultrasonic connector and the in-vivo image acquisition device with the guiding structure as described above.

[0017] In addition, a method for preparing a catheter housing of the in vivo image acquisition device having a guide structure as described above is also provided, comprising:

[0018] A polymer material column structure is manufactured, wherein the main structure has two cavities arranged in parallel up and down, and the upper cavity is used as a collection component placement cavity;

[0019] Partially cut a sheet from the lower side of the outer wall of the columnar structure corresponding to the lower cavity, wherein the proximal boundary of the sheet is connected to the outer wall of the columnar structure, and the remaining boundaries are relatively separated from the outer wall of the columnar structure;

[0020] The sheet is bent inwardly, and a second opening appears on the outer wall of the column structure at a corresponding position before the sheet is bent;

[0021] After thermoplastic shaping, the sheet is kept relatively tilted with the column structure, so that the sheet becomes a blocking side wall, and the cavity of the lower cavity far from the blocking side wall becomes a guide wire guiding cavity.

[0022] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art:

[0023] (1) The structural optimization of the catheter housing enables rapid positioning with the guide wire while ensuring the compactness of the structure. This structure can simplify the processing process and effectively utilize the material of the device itself to achieve the guidance and limitation of the guide wire.

[0024] (2) There is no need to additionally set up a blocking side wall and consider bonding it to the guide wire guiding cavity. The blocking side wall in the embodiment of the present application only needs to be a part of the outer wall and is pressed inward to form the corresponding side wall, thereby saving additional materials and eliminating complicated processes.

[0025] (3) The raw materials and steps required for the entire process are simple and convenient, but can achieve the same effects as other more complex guidewire-guided image acquisition devices. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Attached Figure 1 This is a schematic diagram of the overall external structure of an embodiment of the present application;

[0027] Attached Figure 2 for Figure 1 A cross-sectional view along the axial direction;

[0028] Attached Figure 3 for Figure 1 Cross-section view perpendicular to the axial direction.

[0029] The specific reference numerals of the present application are as follows:

[0030] Catheter housing 1, acquisition component placement cavity 11, cable communication opening, guidewire guiding cavity 12, first opening 121, second opening 122, blocking side wall 123, wire escape groove 13, image acquisition component 2, single-board ultrasonic observation part 21, adhesive 22, signal transmission cable 23, flexible shaft 24, ultrasonic connector 3. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0032] Embodiment 1:

[0033] In the present embodiment, an in vivo image acquisition device with a guiding structure is provided, which utilizes the structural optimization of the catheter shell to achieve rapid positioning in conjunction with a guide wire while ensuring the compactness of the structure. This structure can simplify the processing process and effectively utilize the material of the device itself to achieve guiding and limiting the guide wire.

[0034] Specifically, it includes a catheter housing 1. Preferably, the catheter housing 1 has a cylindrical outer contour. The material of the catheter housing 1 is preferably a biocompatible polymer material. Its cylindrical outer contour is convenient for integral molding and processing. It only needs to be formed by an ordinary cylindrical injection mold. It can also be other overall outer contours close to a cylinder, which are formed by integral molding. Inside it, specifically, the catheter housing 1 has a collection component placement cavity 11 and a guide wire guiding cavity 12 that do not interfere with each other; the mutual non-interference here means that the central axes of the two cavities do not cross. Preferably, the central axes of the collection component placement cavity 11 and the guide wire guiding cavity 12 are both straight and parallel to each other, so it is more conducive to the opening of the cavity on a smaller in-vivo image acquisition device. The molding of the cavity can be molding during injection molding or forming the main body first, and then molding by drilling. Since the central axes of the cavities are all straight lines, it is easier to process. The arrangement of the collection component placement cavity 11 and the guide wire guiding cavity 12 that do not interfere with each other ensures the stability of signal transmission and reduces the interference of the guide wire on the image acquisition component.

[0035] In the present embodiment, an image acquisition component 2 is further provided in the acquisition component placement cavity 11, specifically, it is arranged at the distal end of the acquisition component placement cavity 11, and is used to obtain the external tissue image of the catheter shell 1 and generate an image signal. A cable connecting opening is provided at the proximal end of the acquisition component placement cavity 11, so that the image acquisition component 2 can transmit the collected tissue image to an external image display device through a signal transmission cable 23, and can transmit electrical energy or sound wave energy through the signal transmission cable 23. Preferably, in the present embodiment, the image acquisition component 2 is preferably an acoustic wave detection component, specifically including a single-board ultrasonic observation part 21, and the single-board ultrasonic observation part 21 is fixed to the distal end of the acquisition component placement cavity 11 by an adhesive 22, so the collected image is an image generated by ultrasonic reflection, and the specific imaging principle is not repeated here.

[0036] Further preferably, the proximal end of the single-board ultrasonic observation portion 21 is electrically connected to one end of a signal transmission cable 23, and the other end of the signal transmission cable 23 passes through a cable connecting opening for electrical connection to an ultrasonic connector 3, and the ultrasonic connector 3 is used to connect to an external device to generate ultrasonic energy, so that the image acquisition component 2 generates ultrasonic waves, and after collecting corresponding images, transmits them to an external display device. Specifically, the display device is used to receive image signals, which may include non-volatile computer-readable media, and the non-volatile computer-readable media contains instructions, which, when executed, enable one or more processors to use image signals to image and display tissues located at corresponding positions of the object.

[0037] In this embodiment, the guidewire guiding cavity 12 is provided with a first opening 121 at the distal end of the catheter housing 1, and a second opening 122 connected to the first opening 121 is provided on the side wall of the catheter housing 1, and a blocking side wall 123 is provided on the proximal side of the second opening 122. The blocking side wall 123 is integrally formed with the outer side wall of the catheter housing 1 and is relatively inclined. When in use, the guidewire first passes through the human body channel to enter the tissue position to be observed, and then the first opening 121 of the in vivo image acquisition device of this embodiment is aligned with the tail of the guidewire. Through the guidance of the guidewire guiding cavity 12, the catheter housing 1 moves forward along the direction of the guidewire. When the tail of the guidewire hits the blocking side wall 123, since the blocking side wall 123 has an inclined angle and the second opening 122 is on the outer side wall of the catheter housing 1, the tail of the guidewire will slide down along the blocking side wall 123 and out of the second opening 122, so the guidewire guiding cavity 12 will not be unable to accommodate the guidewire due to excessive length. Preferably, the plane angle of the second opening 122 of the blocking side wall 123 is 30°-80°. Since the blocking side wall 123 is integrally formed with the outer side wall of the catheter housing 1, when manufacturing the catheter housing 1, there is no need to additionally set up a blocking side wall 123 and consider bonding it to the guide wire guiding cavity 12. The blocking side wall 123 in the embodiment of the present application only needs to be a part of the outer side wall, which is pressed inward to form the corresponding side wall.

[0038] And further preferably, the blocking side wall 123 is obtained by partially cutting the outer wall of the catheter housing 1 and bending it inward, that is, the catheter housing 1 before cutting is a tubular structure with a complete outer wall and two cavities, and after the outer wall is partially cut, the second opening 122 is formed at the cutting position, and the outer wall slice bent inward forms the blocking side wall 123. In order to make the obtained blocking side wall 123 inclined, the length of the cut blocking side wall 123 portion is greater than the inner diameter of the guide wire guiding cavity 12, and the width is less than the inner diameter of the guide wire guiding cavity 12. Preferably, the catheter housing 1 is a polymer material, and the blocking side wall 123 is formed by thermoplastic molding so that it is bent relative to the outer wall of the catheter housing 1. And after bending, the preferred bending degree is that the distal end of the blocking side wall 123 abuts against the inner wall of the guide wire guiding cavity 12, ensuring that the guide wire will not enter other gaps.

[0039] In this embodiment, a wire escape groove 13 is also included, which penetrates the outer wall of the catheter housing 1 and is connected to the guide wire guide cavity 12. The width of the wire escape groove 13 is smaller than the inner diameter of the guide wire guide cavity 12. The wire escape groove 13 is respectively connected to the first opening 121 and the second opening 122. The setting of the wire escape groove 13 allows the wire to be removed along the side wall of the catheter housing 1 without returning to the original path from the first opening. The wire only needs to be pulled toward the wire escape groove 13. Here, the outer diameter of the wire should be smaller than the inner diameter of the guide wire guide cavity 12, and larger than the width of the wire escape groove 13, and the minimum inner diameter of the wire when compressed is smaller than the width of the wire escape groove 13. The specific width of the wire escape groove 13 is designed accordingly according to the outer diameter and material of the guide wire actually used.

[0040] On the other hand, the present embodiment also provides an in-vivo image acquisition system, including an ultrasonic connector 3 and the above-mentioned in-vivo image acquisition device with a guiding structure, the proximal end of the single-board ultrasonic observation part 21 is electrically connected to one end of a signal transmission cable 23, and the other end of the signal transmission cable 23 passes through the cable connecting opening for electrical connection with the ultrasonic connector 3 to realize the transmission of ultrasonic energy and the transmission of image signals.

[0041] Embodiment 2:

[0042] In this embodiment, a method for preparing a catheter housing of the in vivo image acquisition device with a guide structure in Embodiment 1 is also provided, which specifically includes:

[0043] S1: A polymer material column structure is manufactured, wherein the main structure has two cavities arranged in parallel up and down, and the upper cavity is used as a collection component placement cavity;

[0044] Since the two cavities are arranged in parallel up and down, and the preferred axis is a straight line, a hole can be drilled in a polymer cylinder after it is obtained to obtain two parallel cavities without the need to open a complex bending cavity as in the prior art. In other methods, the two cavities can also be directly formed by mold injection molding, and the mold structure corresponding to the straight cavity is also relatively simple.

[0045] In this step, the inner diameters of the two parallel cavities are selected according to actual needs, wherein the size of the upper cavity meets the size for installing the image acquisition component, and the size of the lower cavity is slightly larger than the outer diameter of the matching wire.

[0046] S2: Partially cut a sheet from the lower side of the outer wall of the columnar structure corresponding to the lower cavity, wherein the proximal boundary of the sheet is connected to the outer wall of the columnar structure, and the remaining boundaries are relatively separated from the outer wall of the columnar structure;

[0047] This step is used to generate the material of the blocking side wall, which is a part of the outer wall. When it is pressed inward, the corresponding side wall is formed, and no additional material or additional structure is required to form a blocking side wall. Moreover, since it is integrally formed, it is more stable than the blocking side wall set in other ways. The original catheter housing before cutting is a tube structure with a complete outer wall and two cavities. After the outer wall is partially cut, a second opening is formed at the cut, and the outer wall slice bent inward forms the blocking side wall. In order to make the obtained blocking side wall inclined, the length of the cut blocking side wall portion is greater than the inner diameter of the guide wire guiding cavity, and the width is less than the inner diameter of the guide wire guiding cavity.

[0048] S3: The sheet is bent inwardly, and a second opening appears on the outer wall of the column structure at a corresponding position before the sheet is bent;

[0049] S4: After thermoplastic shaping, the sheet is kept tilted relative to the column structure, so that the sheet becomes a blocking side wall, and the lower cavity at the far side of the blocking side wall becomes a guide wire guiding cavity.

[0050] During cutting, specifically, the distal end of the blocking side wall is not cut off, so that it remains connected to the catheter housing 1 to form an integrated structure, and the proximal end and the side are cut open and then bent inside. The raw materials and steps required for the whole process are simple and convenient, but can achieve the effect that other more complex guidewire-guided image acquisition devices can achieve.

[0051] The scheme of the present application is not limited to the method steps in the above-mentioned embodiments. The order of the steps can be appropriately adjusted according to the actual operational requirements of technical personnel in this field. The order of the steps does not limit the scheme of the method in the embodiments of the present application.

[0052] According to the above embodiments, the beneficial effects of the present application are as follows:

[0053] (1) The structural optimization of the catheter housing enables rapid positioning with the guide wire while ensuring the compactness of the structure. This structure can simplify the processing process and effectively utilize the material of the device itself to achieve the guidance and limitation of the guide wire.

[0054] (2) There is no need to additionally set up a blocking side wall and consider bonding it to the guide wire guiding cavity. The blocking side wall in the embodiment of the present application only needs to be a part of the outer wall and is pressed inward to form the corresponding side wall, thereby saving additional materials and eliminating complicated processes.

[0055] (3) The raw materials and steps required for the entire process are simple and convenient, but can achieve the same effects as other more complex guidewire-guided image acquisition devices.

[0056] The "one embodiment" or "embodiment" referred to herein refers to a specific feature, structure or characteristic that may be included in at least one implementation of the present application. In the description of the present application, it should be understood that the terms "upper", "lower", "top", "bottom" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0057] As mentioned above, we have described the present invention in full accordance with the purpose of the present invention, but the present invention is not limited to the above embodiments and implementation methods, and the features of the embodiments can be combined with each other without contradiction. Practitioners in the relevant technical field can make different changes and implementations within the scope permitted by the technical concept of the present invention.

Claims

1. An in vivo image acquisition device with a guiding structure, characterized in that: include: A catheter housing (1), the catheter housing (1) comprising a collection component placement cavity (11) and a guidewire guiding cavity (12) which do not interfere with each other; An image acquisition component (2) is arranged at the distal end of the acquisition component placement cavity (11) and is used to acquire an image of tissue outside the catheter housing (1) and generate an image signal. A cable communication opening is provided at the proximal end of the acquisition component placement cavity (11); The guidewire guiding cavity (12) is provided with a first opening (121) at the distal end of the catheter housing (1), and a second opening (122) communicating with the first opening (121) is provided on the side wall of the catheter housing (1), and a blocking side wall (123) is provided on the proximal side of the second opening (122), wherein the blocking side wall (123) is integrally formed with the outer side wall of the catheter housing (1) and is arranged relatively inclined; The blocking side wall (123) is obtained by partially cutting the outer wall of the catheter housing (1) and then bending it inwards; The distal end of the blocking side wall (123) abuts against the inner wall of the guide wire guiding cavity (12); It also includes a wire detachment slot (13) which penetrates the outer wall of the catheter housing (1) and communicates with the guide wire guiding cavity (12); the width of the wire detachment slot (13) is smaller than the inner diameter of the guide wire guiding cavity (12); and the wire detachment slot (13) is respectively communicated with the first opening (121) and the second opening (122).

2. The in-vivo image acquisition device with a guiding structure according to claim 1, characterized in that: The image acquisition component (2) comprises a single-board ultrasonic observation portion (21), and the single-board ultrasonic observation portion (21) is fixed to the distal end of the acquisition component placement cavity (11) by means of an adhesive (22).

3. The in-vivo image acquisition device with a guiding structure according to claim 2, characterized in that: The proximal end of the single-board ultrasonic observation part (21) is electrically connected to one end of a signal transmission cable (23), and the other end of the signal transmission cable (23) passes through the cable communication opening for electrical connection to the ultrasonic connector (3).

4. The in-vivo image acquisition device with a guiding structure according to claim 3, characterized in that: The catheter housing (1) is made of a polymer material, and the blocking side wall (123) is formed by thermoplastic molding so that it is bent relative to the outer side wall of the catheter housing (1).

5. The in-vivo image acquisition device with a guiding structure according to claim 4, characterized in that: The length of the blocking side wall (123) is greater than the inner diameter of the guide wire guiding cavity (12).

6. An in vivo image acquisition system, characterized in that: It comprises an ultrasonic connector (3) and an in-vivo image acquisition device with a guiding structure as claimed in any one of claims 1 to 5.

7. The in vivo image acquisition system according to claim 6, characterized in that: The method for preparing a catheter housing comprises: A polymer material column structure is manufactured, wherein the main structure has two cavities arranged in parallel up and down, and the upper cavity is used as a collection component placement cavity; Partially cut a sheet from the lower side of the outer wall of the columnar structure corresponding to the lower cavity, wherein the proximal boundary of the sheet is connected to the outer wall of the columnar structure, and the remaining boundaries are relatively separated from the outer wall of the columnar structure; The sheet is bent inwardly, and a second opening appears on the outer wall of the column structure at a corresponding position before the sheet is bent; After thermoplastic shaping, the sheet is kept relatively tilted with the column structure, so that the sheet becomes a blocking side wall, and the cavity of the lower cavity far from the blocking side wall becomes a guide wire guiding cavity.

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