CN216317512U

CN216317512U - Medical catheter probe, medical catheter, medical device and system

Info

Publication number: CN216317512U
Application number: CN202122756148.6U
Authority: CN
Inventors: 王雄伟; 经历
Original assignee: Microport Urocare Shanghai Co Ltd
Current assignee: Microport Urocare Shanghai Co Ltd
Priority date: 2021-11-11
Filing date: 2021-11-11
Publication date: 2022-04-19
Anticipated expiration: 2031-11-11

Abstract

The utility model provides a medical catheter probe, a medical catheter, a medical device and a system, wherein the medical catheter probe comprises a fixed seat, an imaging module and a transparent body; the imaging module is arranged on the end face of the fixed seat; the transparent body is arranged on the fixed seat, the transparent body extends outwards from the end face of the fixed seat, and the far end of the transparent body exceeds the imaging module; an appliance channel which penetrates through the fixed seat and the transparent body is formed on the medical catheter probe. The medical catheter probe is connected to the far end of the catheter mechanism to form a medical catheter, the medical catheter is used in an ERCP operation and replaces perspective to provide a direct-view field for an operator, so that intubation operation is guided, intubation difficulty is reduced, and radiation is prevented from damaging doctors and patients.

Description

Medical catheter probe, medical catheter, medical device and system

Technical Field

The utility model relates to the technical field of medical instruments, in particular to a medical catheter probe, a medical catheter, a medical device and a medical system.

Background

Endoscopic Retrograde Cholangiopancreatography (ERCP) is a cholangiopancreatography procedure that has been developed for many years. When ERCP operation is performed, an operator firstly reaches the duodenal papilla through the oral cavity, the esophagus and the stomach, then inserts an instrument through an instrument channel of the duodenal endoscope, leads the instrument to reach a target lumen through the duodenal papilla under the assistance of fluoroscopy, the target lumen is a pancreatic duct or a bile duct, finally injects contrast medium to observe the pathological change condition inside the pancreatic duct or the bile duct, and performs corresponding treatment, wherein the corresponding treatment comprises the steps of placing a drainage tube and a bracket, breaking stone and fetching stone, performing stenosis dilatation and the like.

In the process of leading the instrument to enter the bile duct or the pancreatic duct, because the duodenal papilla has various shapes and the internal sphincter is easy to shrink when meeting mechanical stimulation, thereby covering the shared segment of the bile duct and the pancreatic duct, the difficulty of directly inserting the instrument by an operator is higher, and the repeated insertion can cause inflammation or other complications. Therefore, in practice, the operator usually inserts a guide wire from the instrument channel of the duodenoscope, then inserts the guide wire into the target lumen with the aid of fluoroscopy, and finally inserts the instrument into the target lumen along the guide wire. During the insertion of the guide wire, the operator usually obtains the bending angle of the guide wire relative to the duodenum through fluoroscopy, however, the operation of the guide wire passing through the duodenal papilla and into the target lumen becomes the most difficult point of ERCP due to the fact that the internal structure of the duodenal papilla is easily blocked by the sphincter and cannot be seen clearly, and the resistance caused by contraction of the sphincter is increased, which results in a greatly prolonged operation time and also easily causes postoperative complications such as bleeding, perforation, pancreatitis and the like.

In addition, the existing ERCP operation needs to be performed under the assistance of fluoroscopy, the fluoroscopy brings radiation problems, certain potential safety hazards are brought to an operator and a patient, in addition, the dependence on the fluoroscopy also causes that the ERCP needs to be in a special ERCP room, the popularization of the ERCP operation is limited, the patient needs to wait in line for the ERCP room to perform the operation, and the waiting time of the patient after being hospitalized is prolonged.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a medical catheter probe, a medical catheter, a medical device and a medical system, aiming at executing ERCP operation without depending on perspective and reducing intubation difficulty.

In order to achieve the purpose, the utility model provides a transparent imaging device which comprises a fixed seat, an imaging module and a transparent body; the imaging module is arranged on the end face of the fixed seat; the transparent body is arranged on the fixed seat, the transparent body extends outwards from the end face of the fixed seat, and the far end of the transparent body exceeds the imaging module; an appliance channel which penetrates through the fixed seat and the transparent body is formed on the medical catheter probe.

Optionally, the transparent body extends along the circumferential direction of the fixed seat and covers at least part of the circumference of the fixed seat.

Optionally, the distance from the outer surface of the transparent body to the axis of the fixed seat gradually decreases along the direction from the proximal end to the distal end.

Optionally, the axis of the portion of the instrument channel in the mount is offset from the axis of the mount.

Optionally, the transparent body is a circumferential closing piece, and the distal end of the transparent body is provided with an opening which forms an outlet of the instrument channel on the transparent body;

the opening and the fixed seat are coaxially arranged; alternatively, the first and second electrodes may be,

the axial line of the opening is inclined relative to the axial line of the fixed seat, the distance from the closest point of the opening to the axial line of the part of the instrument channel in the fixed seat is smaller than the distance from the closest point of the opening to the axial line of the fixed seat, and the closest point of the opening refers to the point where the distance from the opening to the far end face of the fixed seat is the smallest.

Optionally, the imaging module comprises a camera and a light source, and the light source is arranged on the periphery of the camera; the transparent body is provided with a transparent hole, and the light source and/or the camera are/is positioned on the inner side of the projection line of the transparent hole in the axial projection of the medical catheter.

Optionally, in the axial direction of the fixing seat, the distance from the distal end of the transparent body to the imaging module is 1-2 mm.

Optionally, the shore hardness of the transparent body is 70D-80D.

Optionally, the medical catheter probe further comprises a joint part, the joint part is sleeved on the outer peripheral surface of the fixed seat, and the proximal end of the transparent body is connected with the distal end of the joint part.

Optionally, the distance from the proximal end of the joint part to the distal end of the transparent body is 5 mm-10 mm.

To achieve the above object, the present invention also provides a medical catheter including a tube mechanism and the medical catheter probe as described in any one of the preceding items; the tube mechanism is provided with a first channel which extends in an axial direction in a penetrating manner, the fixing seat is connected to the far end of the tube mechanism, and the first channel is communicated with the instrument channel.

Optionally, the medical catheter further comprises a cable, a distal end of the cable being connected to the imaging module; the pipe mechanism is also provided with a second channel which extends in an axial through manner, and the second channel is isolated from the first channel; the cable is arranged in the second channel in a penetrating mode; and/or the presence of a gas in the gas,

the pipe mechanism is provided with a third channel which extends in an axial through manner, the third channel is isolated from the first channel, and the third channel is used for penetrating a bending control pull rope.

In order to achieve the above object, the present invention further provides a medical device, which comprises a handle and the medical catheter as described above, wherein the handle is connected to the proximal end of the tube mechanism, and the handle is provided with an introduction channel communicated with the first channel.

In order to achieve the above object, the present invention further provides a medical system, which includes, for example, an image processing device, an image display device and a medical catheter as described above, wherein the image processing device is communicatively connected to the imaging module and is configured to receive and process the image acquired by the imaging module, and the image display device is communicatively connected to the image processing device and is configured to display the image.

Compared with the prior art, the medical catheter probe, the medical catheter, the medical device and the medical system have the following advantages:

the medical catheter probe comprises a fixed seat, an imaging module and a transparent body; the imaging module is arranged on the end face of the fixed seat; the transparent body is arranged on the fixed seat, the transparent body extends outwards from the end face of the fixed seat, and the far end of the transparent body exceeds the imaging module; an appliance channel which penetrates through the fixed seat and the transparent body is formed on the probe of the medical catheter. The medical catheter probe is connected to the distal end of a tube mechanism and forms a medical catheter which can be used for executing ERCP operation, and in the actual use process, when the distal end of a duodenoscope reaches the duodenal papilla, the distal end of the medical catheter is guided into the body along an instrument channel of the duodenoscope and is inserted into a target lumen through the duodenal papilla, and finally, the instrument is inserted into the target lumen along a first channel of the medical catheter. In the process of inserting the distal end of the medical catheter into a target lumen, after the distal end of the medical catheter extends out of an instrument channel of a duodenoscope, the imaging module can shoot images inside duodenum and provide a visual field for directly viewing a papilla of the duodenum, and because the distal end of the transparent body exceeds the imaging module, even if the distal end of the medical catheter abuts against tissue, the distal end of the transparent body abuts against the tissue, so that a certain distance exists between the imaging module and the tissue to ensure that the imaging module can still normally image, and an operator can conveniently control the medical catheter to find and pass through the papilla of the duodenum. And when the imaging module is used for imaging, because the tissue reflects light and the passage does not reflect light, the area corresponding to the tissue on the image is brighter and the area corresponding to the passage is darker, so that an operator can guide the distal end of the medical catheter to move to a dark place (namely along the passage) according to the brightness of the image, smoothly pass through the common section of the duodenal papilla, the pancreatic duct and the bile duct and enter a target lumen, the target lumen is the pancreatic duct or the bile duct, in addition, after the distal end of the medical catheter is inserted into the lumen, the imaging module images the internal environment in the lumen, and the operator can observe the wall of the lumen and judge whether the lumen is the target lumen. That is to say, when the medical catheter with the medical catheter probe is used for performing the ERCP operation, the internal environment can be clearly observed without depending on perspective, so that the intubation process is simpler, repeated intubation is avoided, the operation time of the ERCP is shortened, the injury to doctors and patients due to radiation is avoided, the ERCP operation can be performed in a common consulting room, the waiting time of the patients after hospital admission is reduced, and the mobility of hospital beds is improved.

Drawings

The drawings are included to provide a better understanding of the utility model and are not to be construed as unduly limiting the utility model. Wherein:

FIG. 1 is a schematic structural view of a medical catheter according to an embodiment of the present invention;

FIG. 2a is a schematic structural view of a fixing base of a medical catheter according to an embodiment of the present invention, in which a second mounting through hole is spaced from a first mounting through hole;

FIG. 2b is a schematic structural view of a fixing base of a medical catheter provided in accordance with an embodiment of the utility model, wherein a second mounting through hole is arranged next to a first mounting through hole;

FIG. 3a is a schematic structural view of a tube mechanism of a medical catheter in accordance with an embodiment of the present invention, showing a third channel;

FIG. 3b is a schematic structural view of a tube mechanism of a medical catheter in accordance with an embodiment of the present invention, showing two third channels;

FIG. 3c is a schematic structural view of a tubing set of a medical catheter in accordance with an embodiment of the present invention showing four third channels;

FIG. 4a is a schematic view of a medical catheter transparency according to an embodiment of the present invention, shown attached to the distal end of a junction;

FIG. 4b is a schematic view of a transparency of a medical catheter according to an embodiment of the present invention, shown attached to a distal end of a joint, and in a different orientation than FIG. 4 a;

fig. 5 is a schematic view of a transparent body of a medical catheter according to a second embodiment of the present invention, wherein the transparent body is connected to the distal end of the junction;

FIG. 6 is a schematic view of a transparent body of a medical catheter according to a third embodiment of the present invention, wherein the transparent body is connected to the distal end of the junction;

FIG. 7 is a schematic view of a transparency of a medical catheter according to a fourth embodiment of the utility model, the transparency being attached to a distal end of a joint;

FIG. 8 is a schematic view of a transparency of a medical catheter according to a fifth embodiment of the present invention, the transparency being attached to a distal end of a joint;

fig. 9 is a schematic structural diagram of a medical device according to an embodiment of the present invention.

[ reference numerals are described below ]:

1-a medical catheter;

10-tube mechanism, 11-first channel, 12-second channel, 13-third channel;

20-medical catheter probe, 100-fixing base, 111-first mounting through hole, 112-second mounting through hole, 113-first sub-instrument channel, 200-imaging module, 210-camera, 220-light source, 300-transparent body, 310-opening, 311-farthest point, 312-closest point, 320-transparent hole, 301-first curved surface, 302-second curved surface, 303-first plane, 304-second plane, 400-bending control pull rope and 500-joint part;

2-handle, 2 a-bending control mechanism.

Detailed Description

The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The utility model is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It should be noted that the drawings provided in the present embodiment are only for illustrating the basic idea of the present invention, and the components related to the present invention are only shown in the drawings rather than drawn according to the number, shape and size of the components in actual implementation, and the type, quantity and proportion of the components in actual implementation may be changed freely, and the layout of the components may be more complicated.

Furthermore, each of the embodiments described below has one or more technical features, and thus, the use of the technical features of any one embodiment does not necessarily mean that all of the technical features of any one embodiment are implemented at the same time or that only some or all of the technical features of different embodiments are implemented separately. In other words, those skilled in the art can selectively implement some or all of the features of any embodiment or combinations of some or all of the features of multiple embodiments according to the disclosure of the present invention and according to design specifications or implementation requirements, thereby increasing the flexibility in implementing the utility model.

As used in this specification, the singular forms "a", "an" and "the" include plural referents, and the plural forms "a plurality" includes more than two referents unless the content clearly dictates otherwise. As used in this specification, the term "or" is generally employed in its sense including "and/or" unless the content clearly dictates otherwise, and the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either fixedly connected, detachably connected, or integrally connected. Either mechanically or electrically. Either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

As used herein, the terms "proximal" and "distal" refer to the relative orientation, relative position, and orientation of elements or actions with respect to one another from the perspective of a clinician using the medical device, and although "proximal" and "distal" are not intended to be limiting, the term "proximal" generally refers to the end of the medical device that is closer to the clinician during normal operation, and the term "distal" generally refers to the end that is first introduced into a patient.

To further clarify the objects, advantages and features of the present invention, a more particular description of the utility model will be rendered by reference to the appended drawings. It is to be noted that the drawings are in a very simplified form and are not to precise scale, which is merely for the purpose of facilitating and distinctly claiming the embodiments of the present invention. The same or similar reference numbers in the drawings identify the same or similar elements.

Fig. 1 shows a schematic structural view of a medical catheter 1 according to an embodiment of the present invention. Referring to fig. 1, the medical catheter 1 includes a tube mechanism 10 and a medical catheter probe 20. The tube means 10 is provided with a first channel 11 (as indicated in fig. 3a, 3b and 3 c) extending axially through it. The catheter probe 20 is coaxially connected to the distal end of the tube mechanism 10 and includes a holder 100, an imaging module 200, and a transparent body 300. The imaging module 200 is disposed on the distal end surface of the fixing base 100. The transparent body 300 is disposed on the fixing base 100, the transparent body 300 extends outward from the distal end face of the fixing base 100, and the distal end of the transparent body 300 exceeds the imaging module 200, that is, the distal end of the transparent body 300 has a certain distance from the distal end of the imaging module 200 in the axial direction of the tube mechanism 10. In addition, the medical catheter probe 20 is further formed with an instrument channel penetrating through the fixing base 100 and the transparent body 300, that is, the instrument channel includes a first sub-instrument channel 113 (as shown in fig. 2 a) located on the fixing base 100 and a second sub-instrument channel (not shown) located on the transparent body 300. The proximal end of the instrument channel communicates with the distal end of the first channel 11. The imaging module 200 is located at the periphery of the exit of the instrument channel on the fixation head 100.

The medical catheter 1 can be applied to ERCP operation, and the specific using process is as follows: the duodenoscope is first passed from the mouth through the esophagus and stomach to the duodenal papilla. Then the medical catheter 1 passes through the instrument channel of the duodenoscope and reaches the papilla of the duodenum, then the imaging module 200 is used for providing a visual field for directly viewing the papilla of the duodenum, an image is obtained, the image is processed by an external image processing device and then displayed by an image display device, so that an operator continues to push the medical catheter 1 according to the guidance of the image, the medical catheter 1 passes through the papilla of the duodenum and reaches a target lumen after passing through a common segment of a pancreatic duct and a bile duct, and the target lumen is a pancreatic duct or a bile duct. Finally, the instrument is delivered into the target lumen through the first channel 11 of the medical catheter 1 and the instrument channel. The instruments include but are not limited to biopsy forceps, an incision knife, a choledochoscope, etc., in addition, in the actual working process, a guide wire, a laser fiber, etc. can be sent into a target lumen by using the first channel 11 and the instrument channel, and water sending and suction operations can be executed through the first channel 11 and the instrument channel.

After the medical catheter 1 provided by the embodiment of the utility model extends out of the duodenum, the imaging module 200 can always and effectively acquire an in-vivo image because the distal end of the transparent body 300 protrudes out of the imaging module 200, and even if the distal end of the medical catheter 1 abuts against tissue (such as sphincter or a vessel wall) during operation, the distal end of the transparent body 300 abuts against the tissue, so that the imaging module 200 and the tissue are isolated, and a certain distance is still provided between the imaging module 200 and the tissue, thereby allowing the imaging module 200 to continue to focus and acquire images. Meanwhile, the imaging module 200 is disposed at the distal end of the tube mechanism 10, so that the imaging module 200 provides a direct view of the duodenal papilla, and the operator can conveniently control the medical catheter 1 to find and pass through the duodenal papilla. Furthermore, there is a change in brightness in the image collected by the imaging module 200 to show the position of the tissue and the passage, and specifically, the imaging module 200 may include a camera 210 and a light source 220, the light source 220 is, for example, an LED lamp bead or an optical fiber, which is used to provide light, and the camera 210 is, for example, a CMOS camera or a CCD camera. When an image is acquired, when a part of light provided by the light source 220 irradiates on a tissue, the part of light is received by the camera 210 after being returned by the tissue, so that an area corresponding to the tissue on the image is brighter, and a part of light is transmitted along a passage, the part of light is not reflected, and is not acquired by the camera 210, so that the area corresponding to the passage on the image is darker, and therefore, an operator can push the medical catheter 1 according to the image, so that the medical catheter 1 moves towards a dark place, particularly at a bifurcation of a pancreatic duct and a bile duct, the operator searches for an inlet of a branch lumen (a pancreatic duct or a bile duct) according to the light and shade indication of the image and smoothly enters the branch lumen, the occurrence of the situation that the distal end of the medical catheter 1 is poked into the tissue is reduced, and further the stimulation on the tissue is reduced. And when the medical catheter 1 enters a branch lumen, the imaging module 200 can also collect images in the branch lumen, so that an operator can observe the tube wall according to the images and judge whether the branch lumen is a target lumen. That is to say, the medical catheter 1 provided by the embodiment of the present invention collects an image of an environment in a patient body through the imaging module 200 and provides a direct-view field instead of a perspective view, so that an operator performs a cannula inserting operation under a completely visible condition, thereby avoiding blind insertion, further avoiding postoperative complications caused by the fact that the medical catheter 1 pokes tissues and an entered lumen exits and is repeatedly inserted instead of a target lumen due to the blind insertion, and further shortening an operation time. In addition, the medical catheter 1 can also avoid the injury of radiation to doctors and patients during fluoroscopy, improve the willingness of doctors and patients to adopt ERCP operation, enable the ERCP operation to be carried out in a common consulting room without waiting for a special ERCP operating room, reduce the waiting time of the patients after hospitalization, and is beneficial to the popularization of the ERCP operation.

The detailed structure of the medical catheter 10 will be described next.

Referring to fig. 2a and 2b, the fixing base 100 is provided with a first mounting through hole 111, a second mounting through hole 112 and the first sub-instrument channel 113 of the instrument channel, which extend axially through the fixing base and are isolated from each other. Preferably, the first sub-instrument channel 113 is aligned with the first mounting hole 111 in a radial direction of the fixing base 100, specifically, when viewed in an axial projection of the fixing base 100, a center point of the first sub-instrument channel 113 and a center point of the first mounting hole 111 are located on the same diameter. The first mounting through holes 111 are used for mounting the camera 210, the number of the second mounting through holes 112 is at least one, and the second mounting through holes 112 are located at the periphery of the first mounting through holes 111, when the number of the second mounting through holes 112 is more than two, for example, two, the two second mounting through holes 112 are symmetrically arranged at two opposite sides of the first mounting through holes 111, and each of the second mounting through holes 112 is used for mounting one of the light sources 220, so that the two opposite sides of the camera 210 have substantially the same brightness. The specific arrangement of the second mounting hole 112 and the first mounting hole 111 may be set according to the size of the light source 220, for example, when the size of the light source 220 is larger, the second mounting hole 112 may be spaced apart from the first mounting hole 111 (as shown in fig. 2 a), so that the cross section of the second mounting hole 112 may be larger, and when the size of the light source 220 is smaller, the second mounting hole 112 may be disposed next to the first mounting hole 111 (as shown in fig. 2 b).

The first sub instrument channel 113 is part of the instrument channel, such that the first sub instrument channel 113 is in communication with the first channel 11, and preferably the first sub instrument channel 113 is coaxially disposed with the first channel 11. In addition, the radial dimension of the tube mechanism 100 should be as small as possible, so that on the mount 100, the axis of the first sub-instrument channel 113 is offset from the axis of the mount 100, and thus the axis of the first channel 11 is offset from the axis of the tube mechanism 10. Here, the meaning of offset means misalignment.

Referring to fig. 3a, 3b and 3c, the imaging module 200 is connected to an external device by a wire (for example, the camera 210 and the light source 220 are connected to an external power source by a wire, and the camera 210 is connected to the image processing apparatus by a wire), so the medical catheter further includes a cable 230, the number of the cable 230 is at least two, for example, the distal ends of at least two cables 230 are respectively connected to the camera 210 and the light source 220. And, the pipe mechanism 10 is further provided with a second passage 12 extending through the pipe mechanism in the axial direction thereof, and the second passage 12 is used for communicating with the first mounting through hole 111 and the second mounting through hole 112 and for passing the cable 230 therethrough. Still further, the tube mechanism 10 can be controlled to bend, so the medical catheter 1 can further include a bending control pulling rope 400, a distal end of the bending control pulling rope 400 can be connected with a distal end of the tube mechanism 10, the tube mechanism 10 is further provided with a third channel 13 which is isolated from the first channel 11 and the second channel 12 and extends through the tube mechanism 10 in the axial direction, and the third channel 13 is used for penetrating through the bending control pulling rope 400. In the embodiment of the present invention, the number of the bending control pulling ropes 400 is not limited, generally, one bending control pulling rope 400 can perform unidirectional bending control on the medical catheter 1, and a plurality of bending control pulling ropes 400 can perform multidirectional bending control on the medical catheter 1. The number of the third channels 13 corresponds to the number of the bending control ropes 400, for example, as shown in fig. 3a, one third channel 13 is disposed on the pipe mechanism 10, or as shown in fig. 3b, two third channels 13 are disposed on the pipe mechanism 10, or as shown in fig. 3c, four third channels 13 are disposed on the pipe mechanism 10.

The transparent body 300 may extend along the circumference of the fixing base 100 and cover at least a part of the circumference of the fixing base 100. In some embodiments, the transparent body 300 may extend 360 ° continuously along the circumference of the fixing base 100, so that the transparent body 300 completely surrounds the fixing base 100 in the circumference direction to form a circumferential enclosure, thereby completely surrounding the imaging module 200 in the circumference direction, which may be referred to as a full-enclosure design. Alternatively, in other embodiments, the transparent body 300 extends along the circumferential direction of the fixing base 100, and the extending range is less than 360 °, for example, 150 °, 180 °, or 270 ° in the circumferential direction, that is, the transparent body 300 does not completely surround the fixing base 100 in the circumferential direction, so as to not completely surround the imaging module 200 in the circumferential direction, which may be referred to as an open design.

Whether the transparent body 300 is designed in a fully enclosed manner or in an open manner, it is preferable that the distance from the outer surface of the transparent body 300 to the axis of the fixing base 100 is gradually reduced from the proximal end to the distal end, that is, the transparent body 300 has a tapered shape or a shape similar to a tapered shape. In this manner, the transparency 300 can function as a guide during insertion of the medical catheter 1, facilitating rapid passage through the duodenal papilla and travel within the lumen. Further, the hardness of the transparent body 300 should be suitable, when the distal end of the medical catheter 1 pokes tissue, if the hardness is too high, the transparent body 300 will cause a large stimulation to the tissue, and if the hardness is too low, the transparent body 300 will deform under the compression of the tissue, and will not play a role in isolating the tissue from the imaging module 200. Preferably, the transparent body 3310 has a Shore hardness of 70D-80D.

It will be appreciated that after the medical catheter 1 is inserted into the target lumen, an instrument (e.g., an incision knife, a choledochoscope, etc.) will extend through the first channel 11 and the instrument channel and be inserted into the target lumen, and thus, the transparent body 300 should not be disposed to obstruct the instrument. In view of this, as shown in fig. 4a to 8, an opening 310 may be disposed on the transparent body 300, and the opening 310 constitutes an outlet of the instrument channel on the transparent body 300, that is, the opening 310 is an outlet of the second sub-instrument channel. Typically, the distal end of the transparency 300 is an open end, i.e., the distal end of the transparency 300 forms the opening 310.

And, in the axial direction of the tube mechanism 10, the distance from the far end of the transparent body 300 to the far end of the imaging module 200 needs to be reasonably set, in other words, the distance from the far end of the transparent body 300 to the far end of the imaging module 200 should be within a reasonable range. This is because too large or too small of a distance affects the quality of the acquired image. In detail, the imaging module 200 needs to collect an image through the transparent body 300 in a part of the orientation, and can directly collect an image without passing through the transparent body 300 in another part of the orientation, for example, the orientation of the opening 310. When the image is reflected, the definition of the region of the image corresponding to the transparent body 300 is reduced compared with the definition of the region corresponding to the opening 310, so that if the distance that the distal end of the transparent body 300 protrudes from the imaging module 200 is too large, the region with lower definition in the image is too large, and the region with higher definition is too small, thereby affecting the overall definition of the image. If the distance that the distal end of the transparent body 300 protrudes from the imaging module 200 is too small, once the distal end of the medical catheter 1 abuts against the tissue, the distance between the imaging module 200 and the tissue is too close to be beneficial for the camera 110 to focus, so that the acquired image is unclear. Preferably, in the axial direction of the pipe mechanism 10, the distance from the distal end of the transparent body 300 to the distal end of the imaging module 200 is 1mm to 2 mm. It should be understood that the distal end of the transparent body 300 refers to the location on the transparent body 300 where the point of greatest axial distance to the distal end face of the mount 100 is located.

Specific modes of the transparent body 300 will be described below by way of example.

Referring to fig. 4a and 4b, in the first embodiment of the utility model, the transparent body 300 is designed to be completely enclosed, and an axis of the opening 310 formed at the distal end of the transparent body 300 is inclined with respect to an axis of the fixing base 100. The opening 310 has a farthest point 311 and a closest point 312, the farthest point 311 is the point of the transparent body 300 having the largest distance to the distal end face of the fixing base 100, in other words, the farthest point 311 is located at the distal end of the transparent body 300. The closest point is the point where the distance from the opening 310 to the distal end surface of the fixing base 100 is the smallest. The closest point 312 is less distant from the axis of the first sub instrument channel 113 than the axis of the holder 100. In this manner, the instrument can be smoothly passed through the second sub-instrument channel and into the target lumen from the opening 310.

And, observe the said medical conduit 1 in the direction of the proximal end to the distal end, the said image module 200 is at least partially covered by the said transparent body 300, its advantage is that can reduce the body fluid entering the inside of the said transparent body 300 as far as possible, and then reduce the body fluid to the pollution of the said lens 210, reduce the negative influence to image acquisition. Moreover, the arrangement is such that the instrument channel is located on one side of the camera 210 to facilitate better viewing of the operation of the instrument.

Fig. 5 shows a schematic structural diagram of a transparent body 300 provided in the second embodiment of the utility model, and as shown in fig. 5, the present embodiment is different from the first embodiment in that a plane where the opening 310 is located (the plane is a distal end face of the transparent body 300) is parallel to the distal end face of the fixing base 100, and an axis of the opening 310 coincides with an axis of the fixing base 100. Compared with the first embodiment, the present embodiment further has an advantage that, when viewed in a radial direction, the opening 310 is closer to the camera 210, so that the camera 210 can acquire image information of more regions through the opening 310, thereby increasing the area of the region with higher definition on the image and decreasing the area of the region with lower definition to provide better intubation guidance for an operator. At the same time, at least a portion of the first sub-instrument channel 113 is still not covered by the transparent body 300, so that the instrument can still pass through the second sub-instrument channel after passing through the first sub-instrument channel 113, and extend out of the opening 310 after passing straight or slightly bent.

Fig. 6 shows a schematic structural diagram of the protective structure 300 provided in the third embodiment of the present invention. As shown in fig. 6, the present embodiment is different from the first embodiment in that a transparent body 300 is provided with a through hole 320, and in the axial projection of the medical catheter 1, the light source 220 and/or the camera 210 are located inside the projection line of the through hole 320. This reduces light reflected by the transparent body and reduces image ghosting.

In this embodiment, the transparent hole 320 includes a first sub-transparent hole 321 and a second sub-transparent hole 322 that are isolated from each other, and in an axial projection of the medical catheter 1, the camera 310 is located inside a projection line of the first sub-transparent hole 321, and one light source 220 is located inside a projection line of the second sub-transparent hole 322. It will be appreciated that in alternative embodiments, the first sub through hole and the second sub through hole may also communicate (not shown in the figures).

Fig. 7 shows a schematic structural diagram of the protective structure 300 provided in the fourth embodiment of the present invention. As shown in fig. 7, in the present embodiment, the transparent body 300 is designed to be open, and the position of the outer edge of the fixing base 100 corresponding to the first sub-instrument channel 113 is not covered by the transparent body 300.

Fig. 8 shows a schematic structural diagram of a protective structure 300 according to a fifth embodiment of the present invention, and as shown in fig. 8, in this embodiment, the transparent body 300 is also designed to be open, and a position of the outer edge of the fixing base 100 corresponding to the first mounting through hole 111 is not covered by the transparent body 300.

In addition, in order to improve the protection of the transparent body 300 against the light source 220 and reduce the pollution of body fluid to the light source 220, the transparent body 300 includes a first curved surface 301, a second curved surface 302, a first flat surface 303 and a second flat surface 304 which are connected with each other, the distal end of the first curved surface 301 extends along the axial direction of the fixing base 100, so that the distal end of the first curved surface 301 constitutes the distal end of the transparent body 300, and the first curved surface 301 further extends along the circumferential direction of the fixing base 100 to cover the region of the outer edge of the fixing base 100 corresponding to the first sub-instrument channel 113. Taking the example that the imaging module 200 includes more than two light sources 220, the number of the second curved surfaces 302 is two, and the two second curved surfaces are respectively connected to two circumferential sides of the first curved surface 301, and the axial length of the second curved surface 302 is smaller than the axial maximum length of the first curved surface 301. The second curved surface 302 extends along the circumferential direction of the fixing base 100 and covers the area of the outer edge of the fixing base 100 corresponding to the second mounting through hole 112. The first plane 303 is connected to the second curved surface 302 and covers the light source 220, and the second plane 304 may be parallel to the axis of the fixing base 100 and connected to the first plane 303 and the first curved surface 301.

In addition, with continued reference to fig. 4a to 8, the medical catheter probe 20 further includes a joint portion 500, and the transparent body 300 is connected to the fixing base 100 through the joint portion 500. The joint part 500 and the transparent body 300 can be an integrally formed structure, and the transparent body 300 is connected to the distal end of the joint part 500. At least a part of the segments of the engaging portion 500 are annular structures, and the engaging portion 500 is sleeved on the outer circumferential surface of the fixing base 100, and preferably, the proximal end of the engaging portion 500 further extends axially and exceeds the proximal end surface of the fixing base 100 so as to be connected with the distal end outer circumferential surface of the tube mechanism 10. The joint part 500 may be connected to the outer circumferential surface of the fixing base 100 by hot melting or gluing.

Hereinafter, for the sake of simplicity, the structure formed by the bonding part 500 and the transparent body 300 is referred to as a shield structure. In the embodiment of the present invention, the axial length of the protective structure (i.e., the length from the proximal end of the joint 500 to the distal end of the transparent body 300) may be 5-10mm, preferably 5-7mm, because if the axial length of the protective structure is too large, the welding point of the cutting wire of the cutting knife must be delayed when an instrument, particularly the cutting knife, enters the pancreatic duct or the bile duct through the instrument channel, so that the distal end of the medical catheter can only maintain a straight state and can not control bending, and the angle of the cutting knife is reduced. The inner diameter of the joint part 500 is set to be generally 2mm to 2.7mm according to the outer diameter of the pipe mechanism 10, and the inner diameter of the transparent body 300 is 1mm to 2 mm. In some embodiments, the inner diameter of the transparent body 300 can decrease in the proximal to distal direction and can have a maximum inner diameter less than or equal to the outer diameter of the mounting base 100 and a minimum inner diameter of 1mm to 1.5mm, or the transparent body 300 can have a uniform inner diameter throughout its axial direction and an inner diameter less than the outer diameter of the mounting base 100, which is done to facilitate assembly of the shield structure to the distal end of the tube mechanism 10 and to ensure that the position of the transparent body 300 is accurate. It should be noted that, when the transparent body 300 is an open design, the inner contour of the cross-section of the transparent body 300 at any position (for example, the contour of the second sub-instrument channel) may at least partially lie on a circle, and the diameter of the circle is the inner diameter of the transparent body 300 at that position.

When assembling the medical catheter 1, firstly, the camera 210 and the light source 220 of the imaging module 200 are mounted on the fixing base 100, and the bending control rope 400 is inserted into the third channel 13, and the distal end of the bending control rope 400 is connected with the catheter mechanism 10. The cable 230 is then threaded through the second channel 12 and the first 113 sub-instrument channel 113 and the first channel 11 are aligned (i.e., the first 113 sub-instrument channel 113 and the first channel 11 are coaxially disposed 113), followed by connecting the anchor block 100 and the tube mechanism 10. The anchor 100 may be attached to the distal end of the tube mechanism 10 by a metal tube, or both may be directly bonded. Subsequently, the transparent body 300 is assembled by fitting the proximal end of the joint 500 over the outer peripheral surface of the fixing base 100 and the outer peripheral surface of the distal end of the tube mechanism 110, aligning the inlet of the second sub-instrument channel with the outlet of the first sub-instrument channel 113, and then connecting the joint 500 to the outer peripheral surface of the fixing base 100 and/or the outer peripheral surface of the distal end of the tube mechanism 10 by any suitable means. Since the inner diameter of at least a portion of the segments of the transparent body 300 is smaller than the outer diameter of the fixing base 100, when the distal end surface of the fixing base 100 abuts against the inner wall of the transparent body 300, so that the protection structure cannot move relative to the tube mechanism 10 in the distal-to-proximal direction, it can be determined that the protection structure is assembled in place, and after the assembly is completed, the transparent body 300 at least partially protrudes from the distal end surface of the fixing base 100.

Further, as shown in fig. 9, the embodiment of the present invention further provides a medical device, which includes a handle 2 and the medical catheter 1 as described above, wherein the handle 2 is connected to the proximal end of the tube mechanism 10, and an introduction channel (not shown in the figure) communicating with the first channel 11 is further provided on the handle 2.

When the medical catheter 1 can be controlled to bend, the handle 2 can be further provided with a bending control mechanism 2a, and the bending control mechanism 2a is connected with the proximal end of the bending control pull rope 400 and is used for providing a control force to the bending control pull rope 400 to control the distal end of the medical catheter 1 to bend or unbend.

Still further, an embodiment of the present invention further provides a medical system, where the medical system includes the medical catheter, an image processing device (not shown in the figure) and an image display device (not shown in the figure), the image processing device is in communication connection with the imaging module 200, specifically, the camera 210, to receive and process the image acquired by the camera, and the image display device is in communication connection with the image processing device to receive and display the processed image.

Although the present invention is disclosed above, it is not limited thereto. Various modifications and alterations of this invention may be made by those skilled in the art without departing from the spirit and scope of this invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims

1. A medical catheter probe is characterized by comprising a fixed seat, an imaging module and a transparent body; the imaging module is arranged on the end face of the fixed seat; the transparent body is arranged on the fixed seat, the transparent body extends outwards from the end face of the fixed seat, and the far end of the transparent body exceeds the imaging module; an appliance channel which penetrates through the fixed seat and the transparent body is formed on the medical catheter probe.

2. The catheter probe of claim 1, wherein the transparent body extends circumferentially of the holder and covers at least a portion of a perimeter of the holder.

3. A medical catheter probe according to claim 1, wherein the distance from the outer surface of the transparent body to the axis of the holder decreases gradually in a direction from the proximal end to the distal end.

4. The medical catheter probe of claim 1, wherein an axis of the portion of the instrument channel in the anchor block is offset from an axis of the anchor block.

5. The medical catheter probe as claimed in claim 4, wherein the transparent body is a circumferential closure and the distal end of the transparent body has an opening constituting an outlet of the instrument channel on the transparent body;

6. The medical catheter probe of claim 1, wherein the imaging module comprises a camera and a light source, the light source being disposed at a periphery of the camera; the transparent body is provided with a transparent hole, and the light source and/or the camera are/is positioned on the inner side of the projection line of the transparent hole in the axial projection of the medical catheter.

7. The medical catheter probe as claimed in claim 1, wherein the distance from the distal end of the transparent body to the imaging module is 1-2 mm in the axial direction of the fixing base.

8. The medical catheter probe of claim 1, wherein the transparent body has a shore hardness of 70D to 80D.

9. The medical catheter probe as claimed in claim 1, further comprising a joint part sleeved on the outer peripheral surface of the fixing base, wherein the proximal end of the transparent body is connected with the distal end of the joint part.

10. The medical catheter probe of claim 9, wherein the distance from the proximal end of the junction to the distal end of the transparent body is 5mm to 10 mm.

11. A medical catheter, comprising a tube means and a medical catheter probe according to any of claims 1-10; the tube mechanism is provided with a first channel which extends in an axial direction in a penetrating manner, the fixing seat is connected to the far end of the tube mechanism, and the first channel is communicated with the instrument channel.

12. The medical catheter of claim 11, further comprising a cable, a distal end of the cable being connected to the imaging module; the pipe mechanism is also provided with a second channel which extends in an axial through manner, and the second channel is isolated from the first channel; the cable is arranged in the second channel in a penetrating mode; and/or the presence of a gas in the gas,

13. A medical device comprising a handle and a medical catheter as claimed in claim 11 or 12, said handle being connected to the proximal end of said tube means and said handle being provided with an introduction passage communicating with said first passage.

14. A medical system comprising, for example, an image processing device communicatively coupled to the imaging module for receiving and processing images acquired by the imaging module, an image display device communicatively coupled to the image processing device for displaying images, and a medical catheter according to any one of claims 11 or 12.