CN211633510U - A visual puncture endoscope - Google Patents

Abstract

The utility model belongs to the technical field of endoscopes, in particular to a visual puncture endoscope. Its technical scheme is: a visual puncture endoscope, comprising a hand-held end of the endoscope, a catheter is connected to the hand-held end of the endoscope, the other end of the catheter is sleeved with a puncture tube for piercing human tissue, and the puncture tube is A driving mechanism for pulling the puncture tube to move on the catheter is connected, and the driving mechanism is connected to the catheter; a light source assembly and a camera are respectively installed in one end of the catheter away from the hand-held end of the endoscope. The utility model provides a pierceable endoscope which can pierce deep human tissue for observation, and the puncture needle will not damage the surrounding tissue.

Description

A visual puncture endoscope

technical field

The utility model belongs to the technical field of endoscopes, in particular to a visual puncture endoscope.

Background technique

An endoscope is a commonly used medical device, which consists of a bendable part, a light source and a set of lenses. It enters the human body through the natural pores of the human body, or through a small incision made by surgery. When in use, the endoscope is introduced into the pre-examined organ, and changes in the relevant parts can be directly observed. The quality of the image directly affects the use effect of the endoscope, and also marks the development level of the endoscope technology. The earliest endoscopy was used for rectal examination. The doctor inserts a hard tube into the patient's anus and observes the lesions of the rectum with the help of the light of the candle. The diagnostic data that can be obtained by this method is limited, the patient is not only very painful, but also the risk of perforation is very high due to the hard instruments. Because of these shortcomings, endoscopy has continued to be applied and developed, and many different uses and types of instruments have been gradually designed.

The invention patent with the patent application number CN200810170666.6 discloses an attached observation puncture endoscope for percutaneous nephrolithotomy, which solves the problems of heavy bleeding, high surgical failure rate, Technical issues with low security. Including main mirror body, image transmission unit, lighting unit, eyepiece unit and puncture body, puncture body includes puncture needle and indwelling tube; puncture needle includes hollow outer tube; eyepiece unit includes eyepiece cover, relay lens, eyepiece lens and eyepiece glass The image transmission unit includes a multifilament image transmission rod arranged inside the hollow outer tube of the puncture needle; the illumination unit includes a beam chuck that can be connected to the main mirror body, and a beam interface that is arranged on the beam chuck and can be connected to an external light source , a light cone arranged in the beam interface, and a light-transmitting optical fiber bundle connected to the image-exiting surface of the multi-filament image-transmitting rod; the outer circumference of the imaging surface of the multi-filament image-transmitting rod is filled with black epoxy glue. It has the advantages of good surgical visibility, less bleeding, high surgical success rate, high safety, and no need for flushing.

The puncture needle is directly installed on the main mirror body of the above device, which is essentially a puncture device. The function of the common endoscope is mainly to observe the inner cavity or the inside of the incision, and the puncture needle does not have bendability, so it cannot be used to observe the condition of a specific part of the human body. Even if the above-mentioned puncture needle is used to puncture a deep part of the human body, the puncture needle will damage the passing human tissue during the movement process, and the operation is difficult.

Existing endoscopes cannot directly observe the inside of human tissue in deep parts. The conventional method is to first use a puncture with a flexible tube to puncture a specific site, then remove the puncture needle and observe the puncture site with an endoscope. This method is cumbersome to operate, and it is difficult for the endoscope to find the punctured incision.

Utility model content

In order to solve the above problems existing in the prior art, the purpose of the present invention is to provide a pierceable endoscope which can pierce deep human tissue for observation, and the puncture needle will not damage the surrounding tissue.

The technical scheme adopted by the utility model is:

A visual puncture endoscope, comprising a handheld end of the endoscope, a catheter connected to the handheld end of the endoscope; A driving mechanism for the tube to move on the catheter, the driving mechanism is connected to the catheter; a light source assembly and a camera are respectively installed in one end of the catheter away from the hand-held end of the endoscope.

Preferably, an outer tube is sleeved at one end of the catheter away from the hand-held end of the endoscope, and the puncture tube and the driving mechanism are arranged between the outer tube and the catheter.

Preferably, the angle between the end face of the end of the puncture tube extending out of the catheter and the axis of the puncture tube is 10°˜60°.

Preferably, the driving mechanism includes a micro motor, the micro motor is mounted on the catheter, the output shaft of the micro motor is connected with a lead screw, the lead screw is threadedly connected with a nut, and the nut is fixed to the puncture tube.

Preferably, the inner wall of the puncture tube is provided with a slider, the outer wall of the catheter is provided with a chute, and the slider is sleeved in the chute.

Preferably, the driving mechanism includes a spring, the spring is sleeved on the catheter, one end of the spring is fixed to the puncture tube, and the other end of the spring is fixed to the catheter; the puncture tube is connected with a pull wire for pulling the puncture tube.

Preferably, the catheter is provided with a pull wire hole, the pull wire extends into the catheter from the pull wire hole, and the end of the pull wire away from the puncture tube extends from the hand-held end of the endoscope.

Preferably, the number of the pulling wires is two, the two pulling wires are respectively arranged on both sides of the puncture tube, the number of pulling wire holes on the catheter is two, and the two pulling wires are respectively passed through one pulling wire hole.

Preferably, the conduit is further provided with an instrument channel for the instrument to pass through.

Preferably, a section of the catheter away from the hand-held end of the endoscope is filled with one of UV glue or epoxy glue.

The beneficial effects of the present utility model are:

1. When the catheter of the present invention moves to a certain position, the driving mechanism can push out the puncture tube, so that the puncture tube can accurately puncture the specific tissue. The puncture tube of the utility model is connected to the conventional endoscope catheter, so that the puncture tube can be carried into the deeper part, which facilitates accurate puncturing of the deeper part. During the puncture process, the light source component provides light, and the camera takes pictures of the puncture site, so that the medical staff can puncture in a visible environment to ensure the accuracy of the puncture. During the movement of the catheter, the driving mechanism can pull the puncture tube back to the catheter, so as to avoid damage to the surrounding tissue caused by the end of the puncture tube.

2. The outer tube can protect the puncture tube and the drive mechanism to avoid damage to the puncture tube or the drive mechanism. At the same time, the driving mechanism will not scratch the surrounding human tissue. There is a certain annular space between the outer tube and the catheter, and the puncture tube can move accurately in the space, so as to avoid the situation that the puncture tube is blocked by the surrounding human tissue and cannot move when the outer tube is not provided.

3. The inclination of the puncture tube is 10° to 60°, after the puncture tube is extended, the catheter can be moved for a certain distance, and the puncture tube can accurately puncture specific tissues. The inclination angle of the puncture tube is suitable, and the puncture accuracy and efficiency are higher. After the puncture tube is punctured, the camera can obtain the internal picture of the tissue, which is convenient for medical staff to observe and analyze the tissue lesions.

4. Due to the restriction of the catheter on the puncture tube, the puncture tube cannot be rotated with the lead screw as the axis of rotation. Therefore, when the micro-motor drives the lead screw to rotate, the nut will not rotate with the lead screw, but can only move linearly. When the nut moves linearly, the puncture tube moves with the nut, and the puncture tube can be retracted onto the catheter or extended out of the catheter for a certain distance. When the puncture tube is retracted, the catheter can move accurately, so as to avoid the situation that the puncture tube exposes the catheter and causes damage to the surrounding human tissue.

5. During the movement of the puncture tube, the slider on the puncture tube always slides in the chute on the catheter, so the movement of the puncture tube is more stable and avoids the situation that the puncture tube is stuck during the movement of the puncture tube. When the slider moves in the chute, the puncture tube will not be inclined during the movement process, which ensures the accurate position of the puncture tube after it is extended, and the puncture position can be accurately controlled.

6. The spring can push the puncture tube out, and the end of the puncture tube can extend out of the catheter for a certain distance, so that the puncture tube can accurately puncture the specific tissue. During the movement of the catheter, the pull wire can be pulled closer, the puncture tube moves backwards, the spring is compressed, and the end of the puncture tube can be retracted to the catheter, so as to avoid damage to the surrounding human tissue caused by the end of the puncture tube when the catheter moves. The other end of the pull wire extends to the hand-held end of the endoscope, which facilitates the control of the pull wire and ensures that the pull wire can pull the puncture tube to move smoothly.

7. When the pull wire passes through the pull wire hole, the pull wire can enter the catheter, and the other end of the pull wire protrudes from the hand-held end of the endoscope, which is convenient for pulling the pull wire. If the pull wire is in the catheter, when the pull wire is pulled, the pull wire will not cut the surrounding human tissue to ensure safety.

8. If the number of pulling wires is two, the puncture tube can be pulled from both sides to avoid the situation that the puncture tube is easy to tilt when pulling the puncture tube unilaterally. When the two pulling wires are pulled at the same time, the puncture tube can move smoothly, so that the puncture tube will not be stuck with the catheter, so that the puncture tube can be accurately pulled back to the catheter. After the puncture tube is pulled back smoothly, the catheter can move smoothly, and the puncture tube can avoid damage to the surrounding human tissue.

9. The instrument channel can be used for the passage of instruments, and it is convenient for the tool to obtain the human tissue at the target position through the instrument channel. After the instrument channel is set, the utility model can not only move the catheter to a certain position and observe the position, but also facilitate the acquisition of the tissue at the position, and the operation is convenient.

10. The section of the catheter away from the hand-held end of the endoscope is filled with UV glue or epoxy resin glue, so that the light source components and cameras in the catheter can be reliably fixed.

The beneficial effects of the present invention are not limited to this description. For better understanding, a more detailed description is given in the specific embodiment section.

Additional advantages, objects, and features of the present invention will be set forth in part in the following description, and in part will become apparent to those of ordinary skill in the art upon study of the following, or may be learned from practice of the present invention. informed. The objectives and other advantages of the invention may be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

Those skilled in the art will appreciate that the objects and advantages that can be achieved with the present invention are not limited to those specifically described above, and the above and other objects that can be achieved by the present invention will be more clearly understood from the following detailed description.

Description of drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained from these drawings without creative efforts.

Fig. 1 is the structural representation of the present utility model;

Fig. 2 is the structural representation of the catheter in the embodiment 1;

Fig. 3 is the partial enlarged view of A place in Fig. 2;

Fig. 4 is the structural representation of the catheter in embodiment 2;

Fig. 5 is a partial enlarged view at B in Fig. 4;

Figure 6 is a left side view of the catheter.

In the figure: 1-handheld end of endoscope; 2-catheter; 3-puncture tube; 4-drive mechanism; 5-outer tube; 21-light source assembly; 22-camera; 23-chute; 24-wire hole; 25 - Instrument channel; 31-slider; 41-miniature motor; 42-lead screw; 43-nut; 44-spring; 45-pull wire.

Detailed ways

The following describes in detail the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary, and are intended to be used to explain the present invention, but should not be construed as a limitation of the present invention.

In the description of the present invention, it should be understood that the terms "first" and "second" are only used for description purposes, and cannot be interpreted as indicating or implying relative importance or indicating the number of technical features indicated. . Thus, a feature defined as "first" or "second" may expressly or implicitly include one or more of that feature. In the description of the present invention, "plurality" means two or more, unless otherwise expressly and specifically defined.

In the present utility model, unless otherwise expressly specified and limited, the terms "installation", "connection", "connection", "fixed" and other terms should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection Connection, or integral connection; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

Example 1

As shown in FIGS. 1 , 2 and 6 , the visual puncture endoscope of this embodiment includes a hand-held end 1 of the endoscope. The hand-held end 1 of the endoscope is connected with a catheter 2 , and the other end of the catheter 2 is sleeved There is a puncture tube 3 for piercing human tissue, the puncture tube 3 is connected with a driving mechanism 4 for pulling the puncture tube 3 to move on the catheter 2, and the driving mechanism 4 is connected to the catheter 2; the catheter 2 is away from the endoscope handheld end 1 A light source assembly 21 and a camera 22 are installed in one end of the light source assembly 21 respectively.

When the catheter 2 of the present invention moves to a certain position, the driving mechanism 4 can push out the puncture tube 3, so that the puncture tube 3 can accurately puncture the specific tissue. The puncture tube 3 of the present invention is connected to the conventional endoscope catheter 2, so that the puncture tube 3 can be carried into the deeper part, which is convenient for accurate puncturing of the deeper part. In the process of puncturing, the light source assembly 21 provides light, and the camera 22 takes pictures of the puncturing site, so that the medical staff can puncture in a visible environment to ensure the accuracy of puncturing. During the movement of the catheter 2, the driving mechanism 4 can pull the puncture tube 3 back to the catheter 2, so as to prevent the end of the puncture tube 3 from causing damage to the surrounding tissue.

Further, an outer tube 5 is sleeved at one end of the catheter 2 away from the endoscope hand-held end 1 , and the puncture tube 3 and the driving mechanism 4 are arranged between the outer tube 5 and the catheter 2 . The outer tube 5 can protect the puncture tube 3 and the driving mechanism 4 to avoid damage to the puncture tube 3 or the driving mechanism 4 . At the same time, the driving mechanism 4 will not scratch the surrounding human tissue. There is a certain annular space between the outer tube 5 and the catheter 2, and the puncture tube 3 can move accurately in this space, avoiding the situation that the puncture tube 3 cannot move due to being blocked by the surrounding human tissue when the outer tube 5 is not provided.

Furthermore, the angle between the end face of the end of the puncture tube 3 extending out of the catheter 2 and the axis of the puncture tube 3 is 10°˜60°. The inclination angle of the puncture tube 3 is 10°˜60°, after the puncture tube 3 is extended, the catheter 2 can be moved for a certain distance, and the puncture tube 3 can accurately puncture the specific tissue. The inclination angle of the puncture tube 3 is suitable, and the puncture accuracy and efficiency are higher. After the puncture tube 3 is punctured, the camera 22 can obtain the internal picture of the tissue, which is convenient for medical staff to observe and analyze the tissue lesions.

Specifically, as shown in FIG. 3 , the driving mechanism 4 includes a micro motor 41 , the micro motor 41 is installed on the guide tube 2 , the output shaft of the micro motor 41 is connected with a lead screw 42 , and the lead screw 42 is threadedly connected with a nut 43 . 43 is fixed to the puncture tube 3 . Due to the restriction of the catheter 2 on the puncture tube 3, the puncture tube 3 cannot rotate with the lead screw 42 as the rotation axis. Therefore, when the micro-motor 41 drives the lead screw 42 to rotate, the nut 43 does not rotate with the lead screw 42, but can only move linearly. When the nut 43 moves linearly, the puncture tube 3 moves with the nut 43, and the puncture tube 3 can be retracted onto the catheter 2 or extended out of the catheter 2 for a certain distance. When the puncture tube 3 is retracted, the catheter 2 can move accurately, so as to avoid the situation where the puncture tube 3 exposes the catheter 2 and causes damage to the surrounding human tissue.

Furthermore, a sliding block 31 is provided on the inner wall of the puncture tube 3 , a sliding groove 23 is provided on the outer wall of the catheter 2 , and the sliding block 31 is sleeved in the sliding groove 23 . During the movement of the puncture tube 3, the slider 31 on the puncture tube 3 always slides in the chute 23 on the catheter 2, so that the puncture tube 3 moves more smoothly and avoids the situation that the puncture tube 3 gets stuck during the movement. When the slider 31 moves in the chute 23, the puncture tube 3 will not tilt during the movement process, which ensures the accurate position of the puncture tube 3 after it is extended, and the puncture position can be accurately controlled.

Furthermore, the conduit 2 is also provided with an instrument channel 25 for the instrument to pass through. The instrument channel 25 can be used for the passage of instruments, and it is convenient for the tool to obtain the human tissue at the target position through the instrument channel 25 . After the instrument channel 25 is provided, the utility model can not only move the catheter 2 to a certain position and observe the position, but also facilitate the acquisition of the tissue at the position, and the operation is convenient.

Furthermore, a section of the catheter 2 away from the hand-held end 1 of the endoscope is filled with one of UV glue or epoxy glue. A section of the catheter 2 away from the hand-held end 1 of the endoscope is filled with UV glue or epoxy resin, so that devices such as the light source assembly 21 and the camera 22 in the catheter 2 can be reliably fixed.

Example 2

As shown in FIGS. 1 , 4 and 6 , the visual puncture endoscope of this embodiment includes a hand-held end 1 of the endoscope. The hand-held end 1 of the endoscope is connected with a catheter 2 , and the other end of the catheter 2 is sleeved There is a puncture tube 3 for piercing human tissue, the puncture tube 3 is connected with a driving mechanism 4 for pulling the puncture tube 3 to move on the catheter 2, and the driving mechanism 4 is connected to the catheter 2; the catheter 2 is away from the endoscope handheld end 1 A light source assembly 21 and a camera 22 are installed in one end of the light source assembly 21 respectively.

When the catheter 2 of the present invention moves to a certain position, the driving mechanism 4 can push out the puncture tube 3, so that the puncture tube 3 can accurately puncture the specific tissue. The puncture tube 3 of the present invention is connected to the conventional endoscope catheter 2, so that the puncture tube 3 can be carried into the deeper part, which is convenient for accurate puncturing of the deeper part. In the process of puncturing, the light source assembly 21 provides light, and the camera 22 takes pictures of the puncturing site, so that the medical staff can puncture in a visible environment to ensure the accuracy of puncturing. During the movement of the catheter 2, the driving mechanism 4 can pull the puncture tube 3 back to the catheter 2, so as to prevent the end of the puncture tube 3 from causing damage to the surrounding tissue.

Further, an outer tube 5 is sleeved at one end of the catheter 2 away from the endoscope hand-held end 1 , and the puncture tube 3 and the driving mechanism 4 are arranged between the outer tube 5 and the catheter 2 . The outer tube 5 can protect the puncture tube 3 and the driving mechanism 4 to avoid damage to the puncture tube 3 or the driving mechanism 4 . At the same time, the driving mechanism 4 will not scratch the surrounding human tissue. There is a certain annular space between the outer tube 5 and the catheter 2, and the puncture tube 3 can move accurately in this space, avoiding the situation that the puncture tube 3 cannot move due to being blocked by the surrounding human tissue when the outer tube 5 is not provided.

Furthermore, the angle between the end face of the end of the puncture tube 3 extending out of the catheter 2 and the axis of the puncture tube 3 is 10°˜60°. The inclination angle of the puncture tube 3 is 10°˜60°, after the puncture tube 3 is extended, the catheter 2 can be moved for a certain distance, and the puncture tube 3 can accurately puncture the specific tissue. The inclination angle of the puncture tube 3 is suitable, and the puncture accuracy and efficiency are higher. After the puncture tube 3 is punctured, the camera 22 can obtain the internal picture of the tissue, which is convenient for medical staff to observe and analyze the tissue lesions.

Specifically, as shown in FIG. 5 , the driving mechanism 4 includes a spring 44 , the spring 44 is sleeved on the catheter 2 , one end of the spring 44 is fixed with the puncture tube 3 , and the other end of the spring 44 is fixed with the catheter 2 ; A pull wire 45 for pulling the puncture tube 3 is connected to it.

The spring 44 can push the puncture tube 3 out, so that the end of the puncture tube 3 can extend out of the catheter 2 for a certain distance, and the puncture tube 3 can accurately puncture a specific tissue. During the movement of the catheter 2, the pull wire 45 can be pulled closer, the puncture tube 3 moves backward, the spring 44 is compressed, and the end of the puncture tube 3 can be retracted to the catheter 2, so as to avoid the puncture tube 3 end when the catheter 2 moves. damage to surrounding human tissue. The other end of the pull wire 45 extends to the endoscope hand-held end 1 , which facilitates the control of the pull wire 45 and ensures that the pull wire 45 can pull the puncture tube 3 to move smoothly.

Further, the catheter 2 is provided with a pull wire hole 24 , the pull wire 45 extends into the catheter 2 from the pull wire hole 24 , and the end of the pull wire 45 away from the puncture tube 3 extends from the endoscope hand-held end 1 . When the pull wire 45 passes through the pull wire hole 24 , the pull wire 45 can enter the catheter 2 , and the other end of the pull wire 45 protrudes from the endoscope hand-held end 1 to facilitate pulling the pull wire 45 . If the pull wire 45 is in the catheter 2, when the pull wire 45 is pulled, the pull wire 45 will not cut the surrounding human tissue, thereby ensuring safety.

Further, the number of the pulling wires 45 is two, the two pulling wires 45 are respectively arranged on both sides of the puncture tube 3, the number of the pulling wire holes 24 on the catheter 2 is two, and the two pulling wires 45 pass through a pulling wire hole 24 respectively. Pass.

When the number of the pulling wires 45 is two, the puncture tube 3 can be pulled from both sides, so as to avoid the situation that the puncture tube 3 is easily inclined when the puncture tube 3 is pulled from one side. When the two pulling wires 45 are pulled at the same time, the puncture tube 3 can move smoothly, so that the puncture tube 3 will not be stuck with the catheter 2, so that the puncture tube 3 can be accurately pulled back to the catheter 2. After the puncture tube 3 is pulled back smoothly, the catheter 2 can move smoothly, and the puncture tube 3 can be prevented from causing damage to the surrounding human tissue.

Furthermore, the conduit 2 is also provided with an instrument channel 25 for the instrument to pass through. The instrument channel 25 can be used for the passage of instruments, and it is convenient for the tool to obtain the human tissue at the target position through the instrument channel 25 . After the instrument channel 25 is provided, the utility model can not only move the catheter 2 to a certain position and observe the position, but also facilitate the acquisition of the tissue at the position, and the operation is convenient.

Furthermore, a section of the catheter 2 away from the hand-held end 1 of the endoscope is filled with one of UV glue or epoxy glue. A section of the catheter 2 away from the hand-held end 1 of the endoscope is filled with UV glue or epoxy resin, so that the light source assembly 21 and the camera 22 and other devices in the catheter 2 can be reliably fixed.

The present utility model is not limited to the above-mentioned optional embodiments, anyone can draw other various forms of products under the inspiration of the present utility model, but no matter if any changes are made in its shape or structure, any product that falls into the present utility model The technical solutions within the scope defined by the claims all fall within the protection scope of the present invention.

Claims (10)

1. A visual puncture endoscope, characterized in that: the endoscope puncture device comprises an endoscope handheld end (1), wherein a catheter (2) is connected to the endoscope handheld end (1), a puncture tube (3) for puncturing human tissues is sleeved at the other end of the catheter (2), a driving mechanism (4) for pulling the puncture tube (3) to move on the catheter (2) is connected to the puncture tube (3), and the driving mechanism (4) is connected to the catheter (2); a light source component (21) and a camera (22) are respectively arranged in one end of the catheter (2) far away from the endoscope handheld end (1).

2. A visual puncture endoscope according to claim 1, characterized in that: one end cover that pipe (2) kept away from endoscope handheld end (1) is equipped with outer tube (5), and puncture pipe (3) and actuating mechanism (4) set up between outer tube (5) and pipe (2).

3. A visual puncture endoscope according to claim 1, characterized in that: the included angle between the end surface of one end of the puncture tube (3) extending out of the catheter (2) and the axis of the puncture tube (3) is 10-60 degrees.

4. A visual puncture endoscope according to any one of claims 1 to 3, characterized in that: the driving mechanism (4) comprises a micro motor (41), the micro motor (41) is installed on the catheter (2), an output shaft of the micro motor (41) is connected with a lead screw (42), the lead screw (42) is in threaded connection with a nut (43), and the nut (43) is fixed with the puncture tube (3).

5. A visual puncture endoscope according to claim 4, wherein: the inner wall of the puncture tube (3) is provided with a sliding block (31), the outer wall of the catheter (2) is provided with a sliding groove (23), and the sliding block (31) is sleeved in the sliding groove (23).

6. A visual puncture endoscope according to any one of claims 1 to 3, characterized in that: the driving mechanism (4) comprises a spring (44), the spring (44) is sleeved on the catheter (2), one end of the spring (44) is fixed with the puncture tube (3), and the other end of the spring (44) is fixed with the catheter (2); the puncture tube (3) is connected with a pull wire (45) for pulling the puncture tube (3).

7. A visual puncture endoscope according to claim 6, wherein: the endoscope is characterized in that a pull wire hole (24) is formed in the catheter (2), a pull wire (45) extends into the catheter (2) from the pull wire hole (24), and one end, far away from the puncture tube (3), of the pull wire (45) extends out of the endoscope handheld end (1).

8. A visual puncture endoscope according to claim 7, wherein: the number of the pull wires (45) is two, the two pull wires (45) are respectively arranged on two sides of the puncture tube (3), the number of the pull wire holes (24) on the catheter (2) is two, and the two pull wires (45) respectively penetrate through one pull wire hole (24).

9. A visual puncture endoscope according to claim 1, characterized in that: an instrument channel (25) for instruments to pass through is further arranged in the catheter (2).

10. A visual puncture endoscope according to any one of claims 1 to 3, characterized in that: one section of the guide tube (2) far away from the endoscope handheld end (1) is filled with one of UV glue or epoxy resin glue.

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