Pulmonary artery inner balloon biopsy catheter

Abstract

The invention provides a balloon biopsy catheter in a pulmonary artery, and belongs to the technical field of balloon biopsy catheters. Comprising a catheter body, a working channel opening is formed in the end of one side of the catheter body, an air bag ventilation connecting opening is formed in the end of the side, close to the working channel opening, of the catheter body, a freezing probe body is installed in the catheter body, and a needle core body is installed in the freezing probe body. By arranging the limiting storage mechanism, the catheter body can pass through a zigzag path of a pulmonary artery, and the inflatable air bag body and the air bag inner bag which are installed at the end of one side of the catheter body are inflated after reaching an occupying lesion position, so that the end part of the catheter body can be quickly fixed; therefore, the position of the end of the catheter body is kept stable in the operation process, the freezing probe body and the needle core body are used in cooperation with the balloon catheter, and biopsy sampling is conducted after the air bag body and the air bag inner bag are fixed.

Description

Technical Field

[0001] The invention relates to the technical field of balloon biopsy catheters, and in particular to an intrapulmonary artery balloon biopsy catheter. Background Art

[0002] For a long time, endocardial biopsy forceps have been commonly used biopsy tools in clinical practice. They are mainly used to sample lesions in the endocardium. However, these traditional tools have obvious limitations for lesions in the pulmonary arteries. With the development of interventional cardiology and intravascular interventional technology, there is an increasing demand for more accurate and safe intrapulmonary artery biopsy technology. In addition, intravascular ultrasound technology is an important technology in cardiovascular interventional treatment. It uses catheter technology to send a miniature ultrasound probe into the vascular cavity, display cross-sectional images of the blood vessels, and provide in vivo images of the vascular cavity.

[0003] When using the existing endocardial biopsy forceps, since the endocardial biopsy forceps are designed mainly for the endocardium, their rigid or semi-rigid clamp bodies are not suitable for operation in the curved pulmonary artery, and it is difficult to reach the target position. In addition, the sampling window of the endocardial biopsy forceps is small, and the sampling amount is limited, which may lead to inaccurate pathological analysis. In addition, the endocardial biopsy forceps cannot be stably fixed in the pulmonary artery during sampling, which may lead to inaccurate sampling or damage to the blood vessel wall. The percutaneous pulmonary biopsy needle also has some disadvantages when in use. First, it is difficult to operate, requires precise positioning, and has high technical requirements for doctors. In addition, the sampling amount is limited, and it may be difficult to accurately control the sampling position due to the linear motion of the needle tip, and because the sampling direction is difficult to control, it may increase the risk of vascular perforation and bleeding. Therefore, the present application provides a pulmonary artery balloon biopsy catheter to meet the needs. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide an intrapulmonary artery balloon biopsy catheter. By setting a limiting storage mechanism, not only can the catheter body pass through the tortuous path of the pulmonary artery, but also an inflatable balloon body and an inner balloon of the balloon installed at the end of one side of the catheter body are inflated after reaching the position of the space-occupying lesion, thereby quickly fixing the end of the catheter body, so that the end of the catheter body can maintain a stable position during the operation. The space for temporary storage of samples formed by the inflation of the balloon body and the inner balloon of the balloon can be used to temporarily store the samples obtained by the needle core body. The above settings can solve the problems of limited sampling amount and poor sampling stability.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0006] A pulmonary artery balloon biopsy catheter comprises a catheter body, one side end of the catheter body is provided with a working channel opening, the side end of the catheter body close to the working channel opening is provided with an airbag ventilation connection port, a cryoprobe body is installed in the catheter body, and a needle core body is installed in the cryoprobe body; a limit storage mechanism, the limit storage mechanism is used to limit the side end of the catheter body away from the working channel opening and temporarily store samples obtained from the end of the needle core body, and the limit storage mechanism is connected to the catheter body.

[0007] Optionally, the limit storage mechanism includes a catheter end mounted on the catheter body, the outer wall of the catheter end is fixedly connected to the airbag body, three airbag inner bags are equidistantly arranged in a ring inside the airbag body, three limit skeletons are equidistantly arranged in a ring on the outer wall of the catheter end, the top of the airbag body is fixedly connected to the first end piece, and the bottom of the airbag body is fixedly connected to the second end piece.

[0008] Optionally, the limiting skeleton and the inner balloon of the airbag are distributed in a staggered manner on the outer wall of the catheter end, and the airbag body, the first end piece and the second end piece are integrally constructed.

[0009] Optionally, the airbag body and the airbag inner bag are integrally constructed, the cavities inside the airbag body and the airbag inner bag are connected, the side of the airbag inner bag close to the catheter end is fixedly connected to the outer wall of the catheter end, and the top and bottom side ends of the airbag body are respectively fixedly connected to the side ends of the catheter end.

[0010] Optionally, a first groove is provided on the side of the catheter body away from the working channel opening, three first grooves are equidistantly provided in an annular manner on the catheter end, a second groove is provided in the middle of the catheter end, and five second grooves are equidistantly provided in an annular manner on the second end piece.

[0011] Optionally, a limiting plate is installed on the catheter body close to the first groove, and a limiting ring is fixedly connected to the bottom of the limiting plate, and the inner diameter of the limiting ring is equal to the outer diameter of the catheter end.

[0012] Optionally, the limiting plate is provided with second lightweight grooves in an annular shape and at equal intervals, the limiting plate and the limiting ring are integrally formed, and the limiting plate is made of plastic material.

[0013] Optionally, the outer wall of the limiting plate is wrapped with a transparent rubber film, and the outer wall edges of the limiting plate and the limiting ring are both arc-shaped.

[0014] Optionally, a third slot is provided on the limiting frame, the third slot is narrow at the top and wide at the bottom, a guide plate is fixedly connected to the limiting frame close to the third slot, and first lightweight slots are equidistantly provided on the guide plate.

[0015] Optionally, a first weakened groove is formed on the top of the limiting piece, a second weakened groove is formed on the top of the limiting piece, and a third weakened groove is formed on the top of the limiting frame.

[0016] Compared with the prior art, the present invention has at least the following beneficial effects:

[0017] In the above scheme, by setting a limit storage mechanism, not only can the catheter body pass through the tortuous path of the pulmonary artery, but also an inflatable balloon body and an inner balloon installed at the end of one side of the catheter body are inflated after reaching the position of the space-occupying lesion, thereby quickly fixing the end of the catheter body, so that the end of the catheter body can maintain a stable position during the operation, and the freezing probe body and the needle core body are used in conjunction with the balloon catheter to perform biopsy after the balloon body and the inner balloon are fixed. The needle core body can take samples while freezing the tissue, reducing the risk of bleeding and improving the quality of the samples. After the samples are taken using the freezing probe body and the needle core body, the samples taken by the needle core body are temporarily stored in the space for temporary storage formed by the inflation of the balloon body and the inner balloon of the balloon by the components in the limit storage mechanism. The freezing probe body and the needle core body are repeatedly operated to take samples, and multiple samples can be taken at one time. Finally, the multiple samples are taken out and tested together with the catheter body and the balloon body. The coordinated use of the structures enables the device to achieve sufficient and multiple sampling of the pulmonary vascular space-occupying lesions. The device combines the medical device field of intravascular ultrasound technology, intracavitary imaging technology and cryobiopsy technology, and can establish a tunnel inside the pulmonary artery space-occupying lesions. The device can also be used in conjunction with an intravascular ultrasound probe and a protective brush for accurate diagnosis and real-time tissue evaluation of space-occupying lesions in the pulmonary artery.

[0018] By arranging an airbag body and an inner airbag bag in the position limiting storage mechanism, since the airbag body, the inner airbag bag and the catheter body are made of a rubber material with good flexibility, it is ensured that they can pass through the tortuosity of the blood vessel smoothly, and the airbag body and the inner airbag bag have sufficient strength to ensure that they can expand evenly after inflation to adapt to different blood vessel diameters. The inflated airbag body and the inner airbag bag can well limit the end of the catheter body after inflation, so that the end of the catheter body on one side close to the sampling point has better stability during the biopsy operation. The coordinated use of the structures effectively makes the use effect of the position limiting storage mechanism better, and the structure is simple and easy to use.

[0019] By providing a limiting skeleton and a guide piece in the limiting storage mechanism, after the catheter body is placed in the desired position and the airbag body and the inner bag of the airbag are inflated, the limiting skeleton is unfolded with the expansion of the inner bag of the airbag, and then the freezing probe body and the needle core body in the catheter body are operated to make the end of the needle core body perform sampling operation. After one sampling is completed, the obtained sample is temporarily stored between the limiting skeleton and the outer wall of the airbag inner bag and the catheter end on both sides. There are three such temporary storage cavities in total. After repeatedly operating the freezing probe body and the needle core body for three samplings, the end of the needle core body passes through the third groove body and moves along the guide of the guide piece to the limiting skeleton away from the wider side of the third groove body. When the needle core body reaches the end of the narrower side of the third groove body, the guide pieces on both sides of the needle core body slightly squeeze the needle core body, and then the needle core body is pulled to scrape the sample obtained at the end of the needle core body from its end, so that the sample is temporarily stored between the inner wall of the limiting skeleton and the outer wall of the airbag inner bag on both sides of the needle core body. The third slot body is in the shape of a non-through limiting skeleton on the limiting skeleton, so that the limiting skeleton and the side of the airbag inner bag away from the third slot body and the outer wall of the catheter end can form a temporary storage cavity closed on three sides. The limiting skeleton is fixedly connected with a guide plate close to the third slot body. The guide plate is an arc-shaped structure recessed toward the center position of the catheter end. The third slot body cooperates with the use of the guide plate to further quickly place the sample in the temporary storage space formed by the inner wall of the limiting skeleton and the outer wall of the airbag inner bag. The first lightweight grooves are equidistantly opened on the guide plate to enhance the deformability of the guide plate and reduce the mass of the guide plate. Then the air in the airbag body and the airbag inner bag is released, and the airbag inner bag and the limiting skeleton are close to the catheter end, so that the taken sample is stably placed between the airbag inner bag and the limiting skeleton. The device can obtain multiple samples at a time when sampling, and then use the detection of multiple samples to further ensure the accuracy of sample detection. The coordinated use of the structures effectively makes the use of the limiting storage mechanism better, and the structure is simple and easy to use.

[0020] By providing a limiting plate and a limiting ring in the limiting storage mechanism, when the airbag body and the inner balloon are expanded, the limiting ring slides from the outer wall of the airbag body along the outer wall of the first end plate toward the limiting plate, and the limiting plate is completely curved due to the extrusion force. After being separated from the airbag body, the inner balloon and the airbag body are fully unfolded, and the limiting skeleton in the airbag body is unfolded and used together with the inner balloon, and the bent limiting plate contacts and squeezes the inner wall of the blood vessel, so that the limiting plate bent into an arc structure, together with the airbag body and the inner balloon, can make the end of the catheter body more stably limited to a specific working position. After use, the airbag body and the inner balloon are retracted onto the outer wall of the catheter end, and the limiting plate rebounds to cause the limiting ring sleeve arranged on the airbag body to limit the airbag body, the inner balloon and the limiting frame, so that the airbag body, the inner balloon and the limiting frame are more stably retracted onto the catheter end, thereby facilitating the end portion of the catheter body close to the catheter end to move in a tortuous blood vessel, and the coordinated use of the structures effectively makes the use of the limiting storage mechanism better, and the structure is simple and easy to use.

[0021] By providing a first slot body and a second slot body in the limit storage mechanism, not only can the first slot body and the second slot body be used in combination, the end of the needle core body can pass through different first slot bodies and second slot bodies to obtain different sampling angles, and thus the needle core body can be sampled more flexibly according to the specific usage conditions on site, and the coordinated use of the structures effectively makes the use effect of the limit storage mechanism better, and the structure is simple and easy to use.

[0022] In summary, the device can not only coordinate the use of the limited storage mechanism and the various components therein, but also can coordinate the existing intravascular ultrasound technology and intracavitary imaging technology through the catheter body, and can more accurately anchor the biopsy tool to the position of the space-occupying lesion in the pulmonary artery, establish a sampling tunnel, and improve the accuracy of sampling. With the use of the 1.1.mm freezing probe body, sampling can be performed while freezing the tissue, reducing tissue elasticity and movement, and further improving the quality and accuracy of the biopsy sample. And after the tunnel is established, multiple samplings are performed to obtain more sufficient tissue samples to meet the needs of pathological analysis. And during the sampling process, the airbag body and the airbag inner balloon fix the end of the catheter body, effectively reducing the movement of the catheter in the blood vessel, reducing the risk of vascular damage and postoperative complications. The use of the freezing probe in the catheter tunnel reduces the risk of bleeding, and the structure of the device is simple, convenient and quick to use, and the production cost of the device is low, and the practicality is good, which is easy to promote and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings, which are incorporated herein and constitute a part of the specification, illustrate embodiments of the invention and, together with the description, further serve to explain the principles of the invention and to enable those skilled in the relevant art to make and use the invention.

[0024] Figure 1 This is a schematic diagram of the three-dimensional structure of the pulmonary artery balloon biopsy catheter;

[0025] Figure 2 It is a schematic diagram of the enlarged structure of the catheter end;

[0026] Figure 3 It is a schematic diagram of a three-dimensional enlarged cross-section of the airbag body;

[0027] Figure 4 for Figure 3 The enlarged structural diagram at A in the middle;

[0028] Figure 5 It is a schematic diagram of the three-dimensional enlarged structure of the airbag body and the limiting piece;

[0029] Figure 6 It is a schematic diagram of the first-person perspective stereoscopic magnification structure of the limiting piece and the limiting frame;

[0030] Figure 7 for Figure 6 The enlarged structural diagram at B in the middle;

[0031] Figure 8 for Figure 6 The enlarged structural diagram at C in the middle;

[0032] Fig. 9 It is a schematic diagram of the structure of the limiting piece and the limiting frame cooperating with the second viewing angle stereoscopic amplification;

[0033] Fig.10 It is a schematic diagram of the enlarged cross-section structure of the airbag body and the airbag inner bag.

[0034] Reference numerals:

[0035] 1. Catheter body; 2. Working channel opening; 3. Airbag ventilation connection port; 4. Cryoprobe body; 5. Needle core body; 6. First groove; 7. Catheter end; 8. First groove body; 9. Second groove; 10. Airbag body; 11. Airbag inner bag; 12. Limiting skeleton; 13. First end piece; 14. Second end piece; 15. Second groove body; 16. Third groove body; 17. Guide piece; 18. First lightweight groove; 19. Limiting ring; 20. Limiting piece; 21. Second lightweight groove; 22. First weakened groove; 23. Second weakened groove; 24. Third weakened groove.

[0036] As shown in the figure, in order to clearly implement the structure of the embodiment of the present invention, specific structures and devices are marked in the figure, but this is only for illustrative purposes and is not intended to limit the present invention to the specific structure, device and environment. According to specific needs, ordinary technicians in this field can adjust or modify these devices and environments. DETAILED DESCRIPTION

[0037] The following is a detailed description of a pulmonary artery balloon biopsy catheter provided by the present invention in conjunction with the accompanying drawings and specific embodiments. At the same time, it is explained here that in order to make the embodiments more detailed, the following embodiments are the best and preferred embodiments, and those skilled in the art may also adopt other alternatives to implement some known technologies; and the accompanying drawings are only for more specific description of the embodiments, and are not intended to specifically limit the present invention.

[0038] It should be noted that the references to "one embodiment", "embodiment", "exemplary embodiment", "some embodiments" and the like in the specification indicate that the embodiments described may include specific features, structures or characteristics, but not every embodiment may include the specific features, structures or characteristics. In addition, when describing specific features, structures or characteristics in conjunction with an embodiment, it should be within the knowledge of technicians in the relevant field whether or not such features, structures or characteristics are explicitly described in conjunction with other embodiments.

[0039] In general, a term can be understood, at least in part, from its use in context. For example, depending, at least in part, on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in the singular sense, or can be used to describe a combination of features, structures, or characteristics in the plural sense. Additionally, the term "based on" can be understood as not necessarily intended to convey an exclusive set of factors, but can instead, depending, at least in part, on the context, allow for the presence of other factors that are not necessarily explicitly described.

[0040] It will be understood that the meanings of “on,” “over,” and “above” in the present invention should be interpreted in the broadest manner, so that “on” not only means “directly on” something, but also includes the meaning of being “on” something with intervening features or layers therebetween, and “on” or “over” not only means “on” or “above” something, but also includes the meaning of being “on” or “above” something with no intervening features or layers therebetween.

[0041] Additionally, spatially relative terms such as "under," "beneath," "lower," "above," "upper," and the like may be used herein for descriptive convenience to describe the relationship of one element or feature to another element or features, as shown in the accompanying drawings. Spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the accompanying drawings. The device may be oriented in other ways, and the spatially relative descriptors used herein may be similarly interpreted accordingly.

[0042] like Figure 1 and Figure 2 As shown, an embodiment of the present invention provides an intrapulmonary artery balloon biopsy catheter, comprising a catheter body 1, one side end of the catheter body 1 is provided with a working channel port 2, the side end of the catheter body 1 close to the working channel port 2 is provided with an airbag ventilation connection port 3, a cryoprobe body 4 is installed in the catheter body 1, and a needle core body 5 is installed in the cryoprobe body 4; a limit storage mechanism, the limit storage mechanism is used to limit the side end of the catheter body 1 away from the working channel port 2 and temporarily store the sample obtained from the end of the needle core body 5, the limit storage mechanism is connected to the catheter body 1, the limit storage mechanism includes a catheter tip 7 installed on the catheter body 1, and the catheter tip 7 is installed on the catheter body 1. The outer wall of 7 is fixedly connected with a balloon body 10, and three balloon inner balloons 11 are equidistantly arranged in a ring inside the balloon body 10. The cryoprobe body 4 is a 1.1 mm cryoprobe. The catheter body 1 can pass through the tortuous path of the pulmonary artery through the limit storage mechanism. Then, an inflatable balloon body 10 and balloon inner balloon 11 installed at the end of one side of the catheter body 1 reach the position of the space-occupying lesion and are inflated, so that the end of the catheter body 1 can be quickly fixed, so that the end of the catheter body 1 can maintain a stable position during the operation, and the cryoprobe body 4 and the needle core body 5 are used in conjunction with the balloon catheter, and biopsy is performed after the balloon body 10 and the balloon inner balloon 11 are fixed.

[0043] The needle core body 5 can take samples while freezing the tissue, reducing the risk of bleeding and improving the quality of the samples. After the samples are taken using the freezing probe body 4 and the needle core body 5, the samples taken by the needle core body 5 are temporarily stored in the space for temporary storage of samples formed by the inflation of the balloon body 10 and the inner balloon 11 of the balloon. The freezing probe body 4 and the needle core body 5 are repeatedly operated to take samples, so that multiple samples can be taken at one time. Finally, the multiple samples are taken out and tested together with the catheter body 1 and the balloon body 10. The coordinated use of the structures enables the device to achieve sufficient and multiple sampling of the space-occupying lesions in the pulmonary blood vessels, and is used in conjunction with the intravascular ultrasound probe to perform morphological evaluation of the space-occupying lesions before and after biopsy through ultrasound imaging technology, providing a more accurate description of the lesions. At the same time, a protective brush is used in combination with bedside ROSE technology to perform rapid and real-time diagnosis of the space-occupying lesions in the pulmonary blood vessels. The above-mentioned ultrasound probe, protective brush, freezing probe body 4 and needle core body 5 are all existing mature technologies, so their working principles and specific structures are not described in detail here. The specific working principle of the above-mentioned limit storage mechanism is described in detail below.

[0044] The airbag body 10 and the airbag inner bag 11 are made of a rubber material with good flexibility to ensure that they can pass through the tortuosity of the blood vessel smoothly, and the airbag body 10 and the airbag inner bag 11 have sufficient strength to ensure that they can expand evenly after inflation to adapt to different blood vessel diameters. The above-mentioned cryoprobe body 4 and needle core body 5 are fully disinfected and cleaned before use to ensure hygiene and reduce the risk of cross infection.

[0045] like Figures 2 to 10 As shown, the position-limiting storage mechanism includes a catheter tip 7 mounted on a catheter body 1, the catheter body 1 and the catheter tip 7 are integrally formed, an airbag body 10 is fixedly connected to the outer wall of the catheter tip 7, three airbag inner bags 11 are equidistantly arranged in an annular manner in the airbag body 10, the airbag body 10 and the airbag inner bags 11 are integrally formed, and the cavities in the airbag body 10 and the airbag inner bags 11 are connected as shown in FIG. Fig.10 As shown, one side of the airbag inner bag 11 close to the catheter end 7 is fixedly connected to the outer wall of the catheter end 7, the top and bottom side ends of the airbag body 10 are respectively fixedly connected to the side ends of the catheter end 7, and the outer wall of the catheter end 7 is annularly equidistantly installed with three limiting skeletons 12, one side end of the limiting skeleton 12 is fixedly connected to the outer wall of the catheter end 7, and the two side outer walls of the limiting skeleton 12 are fixedly connected to the side walls of the airbag inner bag 11, and the limiting skeleton 12 and the airbag inner bag 11 are staggeredly distributed on the outer wall of the catheter end 7 as shown in FIG. Fig.10 shown.

[0046] The catheter body 1 is placed at a desired position and the airbag body 10 and the airbag inner bag 11 are inflated, and the limiting frame 12 is expanded along with the expansion of the airbag inner bag 11, and then the cryoprobe body 4 and the needle core body 5 in the catheter body 1 are operated to make the end of the needle core body 5 perform a sampling operation. After one sampling is completed, the sample is temporarily stored between the limiting frame 12 and the cavity formed by the airbag inner bag 11 on both sides and the outer wall of the catheter tip 7. Figure 4 and Fig.10 As shown, there are three such temporary storage cavities in total. After repeatedly operating the freezing probe body 4 and the needle core body 5 for three samplings, the air in the airbag body 10 and the airbag inner bag 11 is released, and the airbag inner bag 11 and the limiting frame 12 are close to the catheter end 7. At this time, the sample taken is stably placed between the airbag inner bag 11 and the limiting frame 12, and then the catheter body 1 is taken out, and the airbag body 10 and the airbag inner bag 11 are inflated again, and tweezers are used to take out multiple samples temporarily stored between the airbag inner bag 11 and the limiting frame 12 for testing. The device utilizes the coordinated use of structures not only to quickly limit the sampling during sampling, so that the device has better stability during sampling, but also to obtain multiple samples at one time, and then use the detection of multiple samples to further ensure the accuracy of sample detection, and the device has a simple structure, is relatively convenient and quick to use, and has good practicality, which is easy to promote and use.

[0047] Among them, the top of the airbag body 10 is fixedly connected with a first end piece 13, and the bottom of the airbag body 10 is fixedly connected with a second end piece 14. The airbag body 10, the first end piece 13 and the second end piece 14 are integrally formed. The integral structure formed by the airbag body 10, the first end piece 13 and the second end piece 14 has an elliptical cross section when the airbag body 10 and the airbag inner bag 11 are inflated, so that the entire appearance of the device is smoother when in use. Three first grooves 8 are equidistantly provided on the catheter end 7, and five second grooves 15 are equidistantly provided on the second end piece 14. By using the first groove 8 and the second groove 15 in coordination, the end of the needle core body 5 can pass through different first grooves 8 and second grooves 15 to obtain different sampling angles, so that the needle core body 5 can be more flexibly sampled according to the specific use conditions on site. And the coordinated use between the structures further makes the use effect of the limit storage mechanism better, and the structure is simple, and it is more convenient and quick to use.

[0048] like Figures 3 to 10 As shown, the catheter body 1 is provided with a limiting plate 20 near the first groove 6, and the bottom of the limiting plate 20 is fixedly connected to the limiting ring 19, and the inner diameter of the limiting ring 19 is equal to the outer diameter of the catheter end 7. When the airbag body 10 and the airbag inner bag 11 are inflated, the limiting plate 20 is bent and located at the top of the airbag body 10, and the limiting ring 19 is located at the end of the top of the airbag body 10. Figure 3 When the airbag body 10 and the airbag inner bag 11 are not inflated, the airbag inner bag 11 and the limiting frame 12 are folded on the outer wall of the catheter tip 7, the limiting piece 20 approaches a straight line, and the limiting ring 19 is sleeved on the outer wall of the airbag body 10. This is the natural state of the limiting piece 20 and the limiting ring 19 without being affected by external forces.

[0049] Therefore, when in use, by utilizing the expansion of the airbag body 10 and the inner balloon 11, the limiting ring 19 can slide from the outer wall of the airbag body 10 along the outer wall of the first end piece 13 toward the limiting piece 20, and the limiting piece 20 is completely arc-shaped due to the influence of the extrusion force, so that the inner balloon 11 and the airbag body 10 can be fully unfolded, and the limiting skeleton 12 can be unfolded and used together, and the bent limiting piece 20 contacts and squeezes the inner wall of the blood vessel, so that the limiting piece 20 bent into an arc-shaped structure can be used in conjunction with the airbag body 10 and the inner balloon 11 to make the end of the catheter body 1 more stably limited to a specific working position.

[0050] After use, the airbag body 10 and the airbag inner bag 11 are folded on the outer wall of the catheter tip 7, and the limiting piece 20 rebounds to cause the limiting ring 19 to be sleeved on the airbag body 10 to limit the airbag body 10, the airbag inner bag 11 and the limiting frame 12, so that the airbag body 10, the airbag inner bag 11 and the limiting frame 12 can be more stably folded on the catheter tip 7. In addition, the limiting frame 12 is close to a straight line in the initial state, that is, when the airbag body 10 and the airbag inner bag 11 are not inflated, so that it is more convenient to sleeve the limiting piece 20 on the airbag body 10 in a natural state, so that the end of the catheter body 1 close to the catheter tip 7 can move in a tortuous blood vessel. The coordinated use of the structures further improves the use effect of the limiting storage mechanism, and the structure is simple, which is more convenient and quick to use.

[0051] Among them, a second groove 9 is provided in the middle of the catheter tip 7, and a first groove 6 is provided on the side of the catheter body 1 away from the working channel opening 2, so that the airbag body 10 and the airbag inner bag 11 can be folded inside when not in use, so that the limiting piece 20 can be folded inside when not in use, so that the outer wall of the catheter body 1 is smoother as a whole, which is convenient for the use and operation of the catheter body 1. The limiting piece 20 is annularly equidistantly provided with second lightweight grooves 21, so that the deformation ability of the limiting piece 20 is better, and the weight of the limiting piece 20 is lighter. The limiting piece 20 and the limiting ring 19 are integrally constructed. The structural connection has better stability. The limiting plate 20 is made of plastic material. The cost of plastic material is low and the plastic material itself has good deformation ability. The outer wall of the limiting plate 20 is wrapped with a transparent rubber film. The outer wall edges of the limiting plate 20 and the limiting ring 19 are both arc-shaped, so that the limiting plate 20 does not contact the inner wall of the blood vessel. The relatively smooth and soft rubber film is used to contact the blood vessel to prevent the limiting plate 20 from scratching the inner wall of the blood vessel when squeezing the blood vessel. The arc shape has no obvious edges and corners, which further prevents the problem of scratching the inner wall of the blood vessel when the limiting plate 20 contacts the inner wall of the blood vessel.

[0052] A first weakening groove 22 is provided on the top of the limiting piece 20, and a second weakening groove 23 is provided on the top of the limiting piece 20. The setting of the first weakening groove 22 and the second weakening groove 23 makes it easier for the limiting piece 20 to bend and deform from these two points when subjected to external force, thereby further enhancing the deformation ability of the limiting piece 20. A third weakening groove 24 is provided on the top of the limiting frame 12, so that the limiting frame 12 can first deform from the third weakening groove 24 when subjected to external force, so that when the airbag inner bag 11 expands, the limiting frame 12 can be driven to unfold more quickly. A third groove body 16 is provided on the limiting frame 12, and the third groove body 16 is narrow at the top and wide at the bottom. The third groove body 16 on the limiting frame 12 is in the shape of a non-through limiting frame 12, so that the limiting frame 12 and the side of the airbag inner bag 11 away from the third groove body 16 and the outer wall of the catheter end 7 can form a temporary storage cavity closed on three sides, and the third groove body 16 The design is convenient for limiting and guiding the end of the needle core body 5, and its narrow top and wide bottom shape further enhances the guiding effect of the third groove 16 on the end of the needle core body 5, so that the sample obtained at the end of the needle core body 5 can be quickly placed in the temporary storage space formed by the inner wall of the limiting skeleton 12 and the outer wall of the inner bag 11 of the airbag. The limiting skeleton 12 is fixedly connected with a guide piece 17 near the third groove 16. The guide piece 17 is an arc-shaped structure recessed toward the center position of the catheter end 7. The third groove 16 cooperates with the use of the guide piece 17 to further enable the sample to be quickly placed in the temporary storage space formed by the inner wall of the limiting skeleton 12 and the outer wall of the inner bag 11 of the airbag. The first lightweight grooves 18 are equidistantly provided on the guide piece 17, which enhances the deformability of the guide piece 17 and reduces the mass of the guide piece 17. The device further makes the use effect of the limiting storage mechanism better through the coordinated use of the structures, and has a simple structure and is relatively convenient and quick to use.

[0053] The workflow of the technical solution provided by the present invention is as follows:

[0054] First, the limiting ring 19 is sleeved on the balloon body 10, so that the limiting plate 20 is close to a straight line and retracted in the first groove 6, and the balloon body 10 and the balloon inner balloon 11 as well as the limiting frame 12 and the various components therein are retracted in the second groove 9. At this time, the entire outer wall structure of the device is relatively smooth; then the catheter body 1 is passed through the tortuous path of the pulmonary artery, and then an inflatable balloon body 10 and the balloon inner balloon 11 installed at the end of one side of the catheter body 1 reach the position of the space-occupying lesion and are inflated to quickly fix the end of the catheter body 1, so that the end of the catheter body 1 maintains a stable position during the operation, and the limiting frame 12 is expanded as the balloon inner balloon 11 expands and then the freezing probe body 4 and the needle core body 5 are used in conjunction with the balloon catheter, and a biopsy is performed after the balloon body 10 and the balloon inner balloon 11 are fixed.

[0055] During the biopsy sampling process, the end of the needle core body 5 performs a sampling operation. After one sampling is completed, the end of the needle core body 5 passes through the third groove 16 and moves along the guide of the guide piece 17 toward the limiting frame 12 away from the wider side of the third groove 16. When the needle core body 5 reaches the end of the narrower side of the third groove 16, the guide pieces 17 on both sides of the needle core body 5 slightly squeeze the needle core body 5, and then the needle core body 5 is pulled to scrape the sample obtained from the end of the needle core body 5 from its end and temporarily store it between the inner wall of the limiting frame 12 and the outer wall of the airbag inner bag 11 on both sides thereof. Figure 4 and Fig.10 As shown, there are three cavities formed by the inner wall of the limiting skeleton 12 and the outer wall of the airbag inner bag 11 on both sides thereof. After the medical staff repeatedly operate the freezing probe body 4 and the needle core body 5 to take samples three times and place the samples in the three temporary storage cavities respectively, the air in the airbag body 10 and the airbag inner bag 11 is released, and the airbag inner bag 11 and the limiting skeleton 12 are close to the catheter end 7. At this time, the taken sample is stably placed between the airbag inner bag 11 and the limiting skeleton 12, and then the catheter body 1 is taken out, and the airbag body 10 and the airbag inner bag 11 are inflated again, and tweezers are used to take out multiple samples temporarily stored between the airbag inner bag 11 and the limiting skeleton 12 for testing. The device utilizes the coordinated use of structures not only to quickly limit the sampling, so that the device has better stability during sampling, but also to obtain multiple samples at one time, and then use the detection of multiple samples to further ensure the accuracy of sample detection.

[0056] In addition, during the sampling process at the end of the needle core body 5, the first groove body 8 and the second groove body 15 are used in combination, so that the end of the needle core body 5 passes through different first groove bodies 8 and second groove bodies 15 to obtain different sampling angles, thereby enabling the needle core body 5 to perform sampling more flexibly according to the specific use conditions on site. When the airbag body 10 and the airbag inner bag 11 are inflated, the limiting piece 20 is bent and located at the top of the airbag body 10, and the limiting ring 19 is located at the end of the top of the airbag body 10. Figure 3 shown.

[0057] When the airbag body 10 and the inner bag 11 are not inflated, the inner bag 11 and the limiting frame 12 are folded on the outer wall of the catheter tip 7, the limiting plate 20 is close to a straight line, and the limiting ring 19 is sleeved on the outer wall of the airbag body 10. When in use, the limiting ring 19 can slide from the outer wall of the airbag body 10 along the outer wall of the first end plate 13 toward the limiting plate 20 by utilizing the expansion of the airbag body 10 and the inner bag 11. The limiting plate 20 is completely arc-shaped due to the influence of the extrusion force, so that the inner bag 11 and the airbag body 10 can be fully unfolded, and the limiting frame 12 can be unfolded and used together, and the bent limiting plate 20 contacts and squeezes the inner wall of the blood vessel, so that the limiting plate 20 bent into an arc-shaped structure can cooperate with the airbag body 10 and the inner bag 11 to make the end of the catheter body 1 more stably limited to a specific working position. After use, the airbag body 10 and the inner bag 11 are retracted on the outer wall of the catheter terminal 7, and the limiting plate 20 rebounds to cause the limiting ring 19 to be sleeved on the airbag body 10 to limit the airbag body 10, the inner bag 11 and the limiting frame 12, so that the airbag body 10, the inner bag 11 and the limiting frame 12 are more stably retracted on the catheter terminal 7, so that the end of the catheter body 1 close to the catheter terminal 7 is convenient for moving in the tortuous blood vessel.

[0058] Among them, the limiting piece 20 is provided with a second lightweight groove 21 at equal intervals in an annular shape, so that the limiting piece 20 has better deformation ability and lighter weight. The limiting piece 20 and the limiting ring 19 are integrally formed, and the stability of the integral structure connection is better. The limiting piece 20 is made of plastic material, the cost of plastic material is low, and the plastic material itself has good deformation ability. The outer wall of the limiting piece 20 is wrapped with a transparent rubber film, and the outer wall edges of the limiting piece 20 and the limiting ring 19 are both arc-shaped, so that the limiting piece 20 does not contact the inner wall of the blood vessel, and uses a relatively smooth and soft rubber film to contact the blood vessel to prevent the limiting piece 20 from scratching the inner wall of the blood vessel when squeezing the blood vessel, and the arc The shape has no obvious edges and corners, which further prevents the problem of scratching the inner wall of the blood vessel when the limiting plate 20 contacts the inner wall of the blood vessel. A first weakening groove 22 is provided on the top of the limiting plate 20, and a second weakening groove 23 is provided on the top of the limiting plate 20. The setting of the first weakening groove 22 and the second weakening groove 23 makes it easier for the limiting plate 20 to bend and deform from these two points under the action of external force, thereby further enhancing the deformation ability of the limiting plate 20. A third weakening groove 24 is provided on the top of the limiting frame 12, so that the limiting frame 12 can be deformed first from the third weakening groove 24 under the action of external force, so that the limiting frame 12 can be driven to unfold faster when the airbag inner bag 11 expands.

[0059] The limiting frame 12 is provided with a third slot 16, which is narrow at the top and wide at the bottom. The design of the third slot 16 is convenient for limiting and guiding the end of the needle core body 5, and its narrow top and wide bottom further enhance the guiding effect of the third slot 16 on the end of the needle core body 5, so that the sample obtained at the end of the needle core body 5 can be quickly placed in the temporary storage space formed by the inner wall of the limiting frame 12 and the outer wall of the airbag inner bag 11. The limiting frame 12 is fixedly connected with a guide piece 17 near the third slot 16, and the guide piece 17 is directed to the end of the catheter. The arc-shaped structure is concave in the direction of the center position of the head 7, and the third groove body 16 is used in conjunction with the guide piece 17, so that the sample can be quickly placed in the temporary storage space formed by the inner wall of the limiting frame 12 and the outer wall of the airbag inner bag 11. The guide piece 17 is evenly spaced with a first lightweight groove 18, which enhances the deformability of the guide piece 17 and reduces the mass of the guide piece 17. The device further improves the use effect of the limiting storage mechanism through the coordinated use of the structures, and the structure is simple, it is more convenient and quick to use, and the device has good practicality.

[0060] The present invention covers any substitution, modification, equivalent method and scheme made on the essence and scope of the present invention. In order to make the public have a thorough understanding of the present invention, specific details are described in detail in the following preferred embodiments of the present invention, but those skilled in the art can fully understand the present invention without the description of these details. In addition, in order to avoid unnecessary confusion about the essence of the present invention, well-known methods, processes, procedures, components and circuits are not described in detail.

[0061] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A pulmonary artery balloon biopsy catheter, characterized in that: It comprises a catheter body, one end of which is provided with a working channel opening, one end of which is close to the working channel opening is provided with an airbag ventilation connection port, a cryoprobe body is installed in the catheter body, and a needle core body is installed in the cryoprobe body; The position limiting storage mechanism is used to limit the end of the catheter body away from the working channel opening and temporarily store the sample obtained from the end of the needle core body. The position limiting storage mechanism is connected to the catheter body.

2. The intrapulmonary artery balloon biopsy catheter according to claim 1, characterized in that: The limit storage mechanism includes a catheter end mounted on the catheter body, the outer wall of the catheter end is fixedly connected to the airbag body, three airbag inner bags are equidistantly arranged in a ring inside the airbag body, three limit skeletons are equidistantly arranged in a ring on the outer wall of the catheter end, the top of the airbag body is fixedly connected to the first end piece, and the bottom of the airbag body is fixedly connected to the second end piece.

3. The pulmonary artery balloon biopsy catheter according to claim 2, characterized in that: The limiting skeleton and the inner balloon are distributed on the outer wall of the catheter end in a staggered manner, and the balloon body, the first end piece and the second end piece are integrally constructed.

4. The pulmonary artery balloon biopsy catheter according to claim 2, characterized in that: The airbag body and the airbag inner bag are integrally constructed, the cavities inside the airbag body and the airbag inner bag are connected, the side of the airbag inner bag close to the catheter end is fixedly connected to the outer wall of the catheter end, and the top and bottom side ends of the airbag body are fixedly connected to the side ends of the catheter end respectively.

5. The intrapulmonary artery balloon biopsy catheter according to claim 2, characterized in that: A first groove is provided on one side of the catheter body away from the working channel opening, three first grooves are equidistantly provided in a ring on the catheter end, a second groove is provided in the middle of the catheter end, and five second grooves are equidistantly provided in a ring on the second end piece.

6. The pulmonary artery balloon biopsy catheter according to claim 5, characterized in that: A limiting plate is installed on the catheter body close to the first groove, and a limiting ring is fixedly connected to the bottom of the limiting plate. The inner diameter of the limiting ring is equal to the outer diameter of the catheter end.

7. The intrapulmonary artery balloon biopsy catheter according to claim 6, characterized in that: The limiting plate is provided with second lightweight grooves in an annular manner and at equal intervals. The limiting plate and the limiting ring are integrally formed, and the limiting plate is made of plastic material.

8. The pulmonary artery balloon biopsy catheter according to claim 6, characterized in that: The outer wall of the limiting plate is wrapped with a transparent rubber film, and the outer wall edges of the limiting plate and the limiting ring are both arc-shaped.

9. The pulmonary artery balloon biopsy catheter according to claim 2, characterized in that: The limiting frame is provided with a third slot body, which is narrow at the top and wide at the bottom. The limiting frame is fixedly connected with a guide piece close to the third slot body, and the guide piece is provided with first lightweight slots at equal intervals.

10. The pulmonary artery balloon biopsy catheter according to claim 6, characterized in that: A first weakened groove is formed on the top of the limiting piece, a second weakened groove is formed on the top of the limiting piece, and a third weakened groove is formed on the top of the limiting frame.

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