CN211796353U - A catheter and endoscopic device - Google Patents

Abstract

The utility model relates to the field of medical instruments, in particular to a catheter and an endoscopic device. A conduit includes a pipe body and a reinforcement layer. The pipe body includes a first segment and a second segment; both the first segment and the second segment are provided with at least one functional channel, and the functional channel in the first segment communicates with the functional channel in the second segment correspondingly . The reinforcement layer covers the outer peripheral surface of the pipe body, and the reinforcement layer covering the outer periphery of the first segment and the first segment together form the body segment, and the reinforcement layer covering the outer periphery of the second segment and the second segment together form an active segment. The stiffness of the body segment is greater than the stiffness of the active segment. The catheter can be bent and deflected under the action of external force, thereby meeting the visual diagnosis requirements of endoscopic equipment; meanwhile, the structure of the pipe body is simple, the manufacturing difficulty is low, and the internal space of the catheter is saved.

Description

A catheter and endoscopic device

technical field

The utility model relates to the field of medical instruments, in particular to a catheter and an endoscopic device.

Background technique

In minimally invasive surgery, slender instruments such as catheters are usually used to pass through the natural path of the patient to reach the lesion site for diagnosis and treatment. Since surgery requires high precision and judgment, its visualization is particularly important. Therefore, slender endoscopic equipment Or catheter is an essential auxiliary device.

Due to its many functions, conventional gastrointestinal endoscopes need to provide working channels for the entry and exit of medical instruments in addition to the requirements of liquid (gas) entry and exit, data transmission, lighting, and direction deflection. For the deflection of the distal end in four directions, up, down, left, and right, the deflected part of the distal end needs to be made into a bendable snake bone, and four slidable stainless steel wires are placed in the snake bone. The most distal end is fixedly connected, and the proximal end is fixed with the wheel on the handle. By rotating the wheel, the steel wire slides and drives the distal snake bone to bend, so as to achieve the purpose of distal deflection of the endoscope. It needs to be riveted between them, and the cross section of the snake bone needs to be perforated to install the traction wire, which makes it difficult to make the outer diameter smaller, and the structure is complicated and takes up space.

Utility model content

The purpose of the present utility model is to provide a catheter and endoscopic equipment, which can be bent and deflected under the action of external force, thereby meeting the visual diagnosis requirements of the endoscopic equipment; at the same time, the structure of the pipe body is simple, and its manufacturing difficulty is low. And it is beneficial to save the inner space of the conduit.

The embodiment of the present utility model is realized in this way:

In a first aspect, the embodiment provides a catheter, which includes a pipe body and a reinforcement layer;

The pipe body includes a first segment and a second segment; both the first segment and the second segment are provided with at least one functional channel, and the functional channel in the first segment communicates with the functional channel in the second segment correspondingly ;

The reinforcement layer covers the outer peripheral surface of the pipe body, and the reinforcement layer covering the outer periphery of the first segment and the first segment together form the body segment, and the reinforcement layer covering the outer periphery of the second segment and the second segment together form an activity segment;

The stiffness of the body segment is greater than the stiffness of the active segment.

In an optional embodiment, the reinforcing layer includes a first outer layer and a second outer layer sequentially arranged from the inside to the outside along the radial direction of the pipe body;

The second outer layer includes a first segment corresponding to the outer periphery of the first segment, and a second segment corresponding to the outer periphery of the second segment.

In an alternative embodiment, the stiffness of the first subsection is greater than the stiffness of the second subsection.

In an alternative embodiment, the first subsection and the second subsection overlap at the junction of the first segment and the second segment.

In an optional embodiment, the first outer layer is a metal woven mesh;

The second outer layer is made of polymer material.

In an optional embodiment, at least two wire passages for the steering wires to pass through are provided in the first section and in the second section, and the two wire passages in the first section are connected to the second section. The two wire body channels in the interior are connected in a one-to-one correspondence.

In an alternative embodiment, the inner diameter of the wire body channel is smaller than the inner diameter of the functional channel.

In an alternative embodiment, the first segment and the second segment are made in one piece.

In an optional embodiment, the first segment and the second segment are made in separate parts, and the stiffness of the first segment is greater than that of the second segment.

In a second aspect, the embodiment provides an endoscopic device, which includes a functional end, a handle and the above-mentioned catheter; the functional end is connected to the distal end of the movable segment, and the handle is connected to the proximal end of the body segment;

The functional end includes a camera and a plurality of connection channels, and the plurality of connection channels are connected to the line channel and the function channel in one-to-one correspondence;

The handle includes a handle body, a runner, a cable and at least two control wires; the runner is rotatably connected to the handle body; one end of the two control wires is connected to the runner and is located on both sides of the runner respectively. The other end of the line is connected with the corresponding connection channel after passing through the line body channel; the cable is connected with the camera through the function channel.

The beneficial effects of the embodiments of the present utility model include:

The conduit includes a pipe body and a reinforcement layer. The pipe body and the reinforcing layer covering the outer periphery of the pipe together form a body section and a movable section, and the rigidity of the body section is greater than that of the movable section. Furthermore, when the catheter is acted by an external force, the movable section of the catheter will be bent and deformed relative to the body section under the action of the external force, so that the movable section of the catheter has a certain bending deformation ability, so that the catheter can be used in the endoscopic device when the catheter is used. , through the action of external force to bend the movable section, the angle of the movable section can be adjusted.

In addition, the pipe body also includes a functional channel running through the body section and the movable section along the extension direction of the pipe body. The functional channel is used for equipment such as cables or guide wires to pass through for visualization or other functions.

To sum up, compared with the way of realizing bending through the snake-bone structure in the prior art, the catheter can make the rigidity of the main body segment and the movable segment inconsistent, and at the same time, the functional channel for realizing the visualization function of the endoscopic device is provided in the body of the catheter. Further, the structure of the catheter can be simplified, and at the same time, the outer diameter of the catheter can be reduced, and the inner space of the catheter can be saved, so as to increase the inner diameter of the functional channel.

Description of drawings

In order to illustrate the technical solutions of the embodiments of the present invention more clearly, the accompanying drawings that need to be used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention. Therefore, it should not be regarded as a limitation of the scope. For those of ordinary skill in the art, other related drawings can also be obtained from these drawings without any creative effort.

1 is a schematic structural diagram of a catheter in an embodiment of the present invention;

2 is a schematic diagram of the arrangement of a wire body channel and a functional channel in an embodiment of the present invention;

3 is a schematic diagram of the connection between the catheter and the handle in the embodiment of the present invention.

Icon: 100-catheter; 110-tube body; 120-reinforced layer; 111-first segment; 112-second segment; 130-functional channel; 140-body segment; 150-active segment; 121-first outer segment layer; 122-second outer layer; 123-first subsection; 124-second subsection; 160-wire body channel; 210-functional end; 220-handle; 221-handle body; Manipulate the line.

Detailed ways

In order to make the purposes, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. The embodiments described above are a part of the embodiments of the present invention, but not all of the embodiments. The components of the embodiments of the invention generally described and illustrated in the drawings herein may be arranged and designed in a variety of different configurations.

Accordingly, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

It should be noted that like numerals and letters refer to like items in the following figures, so once an item is defined in one figure, it does not require further definition and explanation in subsequent figures.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner" and "outer" The orientation or positional relationship indicated by etc. is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that is usually placed when the utility model product is used, only for the convenience of describing the present utility model and simplifying the description, not Indicates or implies that the referred device or element must have a particular orientation, be constructed and operate in a particular orientation, and therefore should not be construed as a limitation of the present invention. Furthermore, the terms "first", "second", "third", etc. are only used to differentiate the description and should not be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical" and the like do not imply that a component is required to be absolutely horizontal or overhang, but rather may be slightly inclined. For example, "horizontal" only means that its direction is more horizontal than "vertical", it does not mean that the structure must be completely horizontal, but can be slightly inclined.

In the description of the present invention, it should also be noted that, unless otherwise expressly specified and limited, the terms "arrangement", "installation", "connection" and "connection" should be understood in a broad sense, for example, it may be a fixed connection It can also be a detachable connection or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or the internal communication between the two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations.

In minimally invasive surgery, slender instruments such as catheters are usually used to pass through the natural path of the patient to reach the lesion site for diagnosis and treatment. Since the operation requires high precision and judgment, its visualization is particularly important. Therefore, slender endoscopic equipment Or catheter is an essential auxiliary device.

Due to its many functions, conventional gastrointestinal endoscopes need to provide a working channel for the entry and exit of medical instruments in addition to the requirements of liquid (gas) entry and exit, data transmission, illumination and direction deflection, making it difficult to achieve a relatively large outer diameter. Small, generally more than 5mm, which cannot be directly used for visual diagnosis and treatment operations for small natural cavities such as bile duct or pancreatic duct.

Usually, when examining smaller cavities such as the bile duct or pancreatic duct, a duodenal endoscope is first inserted into the duodenal papilla through the digestive tract, and then a guide wire is inserted through the working channel of the endoscope. The guide wire is used to guide the insertion of various slender medical instruments, and X-rays are used to determine the internal conditions of these cavities and adjust the position of the guide wire and slender instruments. On the one hand, the intuitiveness is poor, especially when entering the bile duct branches , the operation is difficult and requires doctors to have rich experience. On the other hand, the radiation brought by X-rays also brings great risks to doctors and patients.

In order to achieve the deflection in four directions of the distal end, up, down, left and right, the conventional endoscope needs to make the distal deflection part into a bendable snake bone, and put four slidable stainless steel wires in the snake bone. The most distal end is fixedly connected with the most distal end of the snake bone, and the proximal end is fixed with the wheel on the handle. By rotating the wheel, the wire slides and drives the distal snake bone to bend, so as to achieve the purpose of the distal end of the endoscope deflecting. This design structure requires riveting between the snake bones, and the cross section of the snake bones needs to be perforated to install the traction wire. The single-sided wall thickness is usually more than 1mm, and the space required by other functions is at least 3mm. The above diameter space (according to the current state of the art, the clamp channel needs at least 2mm diameter space, the optical lens needs at least 1mm diameter space, plus lighting, injection, etc.), its outer diameter is difficult to be less than 5mm, and the process is also more complicated.

To sum up, in the prior art, the catheter of the endoscopic device has problems such as complicated manufacturing process and excessively large outer diameter of the catheter.

Based on the above reasons, the catheter and the endoscopic device provided in this embodiment can effectively alleviate the technical problem. Specifically, please refer to FIG. 1-FIG. 2, FIG. 1 shows the structure of the catheter in the embodiment of the present invention, and FIG. 2 shows the structure of the wire body channel and the functional channel in the embodiment of the present invention; this embodiment provides a A conduit 100 includes a pipe body 110 and a reinforcing layer 120 .

The pipe body 110 includes a first segment 111 and a second segment 112; both the first segment 111 and the second segment 112 are provided with at least one functional channel 130, and the functional channel 130 in the first segment 111 and the The functional channels 130 in the second segment 112 correspond to each other.

The reinforcement layer 120 covers the outer peripheral surface of the pipe body 110 , and the reinforcement layer 120 covering the outer periphery of the first segment 111 and the first segment 111 together form the body segment 140 , and the reinforcement layer covering the outer periphery of the second segment 112 forms the body segment 140 . The layer 120 and the second segment 112 together form the active segment 150; the stiffness of the body segment 140 is greater than the stiffness of the active segment 150.

It should be noted that, when the pipe body 110 is provided, the pipe body 110 may be made of PEBAX (polyether block polyamide), PU (polyurethane material) and silica gel, and its Shore stiffness may be 25D-40D.

The working principle of the catheter 100 is:

The conduit 100 includes a pipe body 110 and a reinforcing layer 120 . The pipe body 110 and the reinforcing layer 120 covering the outer periphery of the pipe body 110 together form a body section 140 and a movable section 150 , and the rigidity of the body section 140 is greater than that of the movable section 150 . Furthermore, when the catheter 100 is acted by an external force, the movable section 150 of the catheter 100 will be bent and deformed relative to the body section 140 under the action of the external force, so that the movable section 150 of the catheter 100 has a certain bending deformation ability, and thus can be endoscopically deformed. When the device adopts the catheter 100, the movable section 150 can be bent by the action of external force, so that the angle of the movable section 150 can be adjusted.

In addition, the tube body 110 further includes a functional channel 130 penetrating the body section 140 and the movable section 150 along the extending direction of the tube body 110 . The functional channel 130 is used for the passage of equipment such as cables or guide wires, so as to facilitate visualization or other functions.

To sum up, compared with the way in the prior art to achieve bending through the serpentine structure, the catheter 100 makes the rigidity of the body section 140 and the movable section 150 inconsistent, and at the same time, the visualization of the endoscopic device is realized by being arranged in the tube body 110 The functional functional channel 130 can further simplify the structure of the catheter 100 , and can help reduce the outer diameter of the catheter 100 and save the inner space of the catheter 100 to increase the inner diameter of the functional channel 130 .

Further, based on the above-mentioned conduit 100 , when the reinforcement layer 120 is provided, the reinforcement layer 120 may include a first outer layer 121 and a second outer layer 122 sequentially arranged from the inside to the outside along the radial direction of the pipe body 110 . Since the reinforcement layer 120 covers the outer peripheral surface of the pipe body 110 , the outer peripheral surfaces of the first segment 111 and the second segment 112 of the pipe body 110 are both covered with the first outer layer 121 and the second outer layer 122 . The first outer layer 121 of the outer peripheral surface of the first segment 111 and the second segment 112 is continuous; and the second outer layer 122 includes a first sub-section 123 corresponding to the outer periphery of the first segment 111, and a corresponding The second subsection 124 of the outer periphery of the second section 112 ; the stiffness of the first subsection 123 is greater than that of the second subsection 124 .

Through the above-mentioned arrangement of the reinforcing layer 120 , the part of the second outer layer 122 clad outside the first segment 111 and the second segment 112 is divided into the first segment 123 and the second segment 124 , and the first segment 123 and the second segment 124 are divided into The stiffness of the first subsection 123 is greater than the stiffness of the second subsection 124 , so that under the action of the second outer layer 122 , the stiffness of the body section 140 formed by the first subsection 111 and the first subsection 123 can be made greater than that of the second subsection 123 . The stiffness of the movable section 150 formed by the segment 112 and the second segment 124 together. As a result, under the action of external force, the movable section 150 of the catheter 100 will be bent and deformed relative to the body section 140, thereby meeting the requirements of use.

In addition, since the stiffness of the first subsection 123 and the second subsection 124 are different, in order to increase the stiffness of the connection between the movable section 150 and the body section 140, the first subsection 123 and the second subsection 124 are in the first subsection 123 and the second subsection 124. The junction of the segment 111 and the second segment 112 overlaps.

In addition, in the embodiment of the present invention, when the first outer layer 121 and the second outer layer 122 are arranged, the first outer layer 121 and the second outer layer 122 are arranged in order from the inside to the outside along the radial direction of the pipe body 110 . The first outer layer 121 can be made of metal woven mesh; and the second outer layer 122 can be made of polymer materials such as Pebax (polyether block polyamide) or PA (polyamide).

Further, in this embodiment, by adopting the above-mentioned structure of the catheter 100 , the outer diameter of the pipe body 110 can be made smaller than or equal to 3.5 mm, and the outer diameter of the body section 140 can be made smaller than or equal to 4 mm. It should be noted that when the outer diameter of the tube body 110 is 3.5 mm and the outer diameter of the body section 140 is 4 mm, the difference between the body section 140 and the tube body 110 is that the outer peripheral surface of the body section 140 is covered with reinforcement Therefore, under this condition, the thickness of the reinforcing layer 120 covering the first segment 111 and forming the body segment 140 together with the first segment 111 is 0.5 mm. Such an arrangement can effectively reduce the outer diameter of the catheter 100 and save the inner space of the catheter 100 , thereby increasing the inner diameter of the functional channel 130 .

In this embodiment, at least two wire passages 160 for the manipulation wires 223 to pass through are provided in the first segment 111 and in the second segment 112 , and the two wire passages 160 in the first segment 111 and The two wire channels 160 in the second segment 112 are connected in a one-to-one correspondence. And when the wire body channel 160 and the functional channel 130 are arranged, the inner diameter of the wire body channel 160 is smaller than the inner diameter of the functional channel 130 . In order to further save the inner space of the tube body 110 , the inner diameter of the wire body channel 160 can be adapted to the outer diameter of the manipulation wire 223 .

In the process of setting the wire body channel 160, it should be noted that when the wire body channel 160 and the function channel 130 are set on the body segment 140 and the movable segment 150, the wire body channel 160 on the body segment 140 and the movable segment 150 and the function The channels 130 correspond and have parallel axes.

In addition, when the wire body channel 160 is provided, since the function of the wire body channel 160 is to allow the manipulation wire 223 to pass through, and the function of the manipulation wire 223 is to drive the movable segment 150 to bend, in order to enable the movable segment 150 to pass between the two manipulation wires 223 Therefore, when the two wire passages 160 of the same group of control wires 223 are arranged and installed, the two wire passages 160 are symmetrically arranged corresponding to the central axis of the pipe body 110 .

It should be noted that when arranging the wire body channel 160, the function of the wire body channel 160 is to pass the manipulation wire 223 that drives the bending of the movable section 150, and in the process of use, in order to meet the use requirements of the endoscopic device, it is necessary to The movable section 150 can drive the movable section 150 to bend in four directions relative to the body section 140, and the four directions are perpendicular to each other. Therefore, in this embodiment, four wire channels 160 are set on the tube body 110 as an example. , and the four wire body passages 160 are arranged at intervals around the central axis of the tube body 110 in sequence.

In other embodiments of the present invention, when the wire body channel 160 is not provided in the tube body 110 , the manipulation wire 223 may be arranged outside the catheter 100 .

Further, based on the above-mentioned catheter 100, when the pipe body 110 is arranged, the first segment 111 and the second segment 112 in the pipe body 110 can be made in one piece or in a separate manner.

In this embodiment, a split-type manufacturing method is adopted. At this time, in order to make the rigidity of the body segment 140 greater than that of the movable segment 150, the rigidity of the first segment 111 can be made greater than that of the second segment 112. .

Therefore, it can be seen from the above content that in this embodiment, in order to make the rigidity of the main body section 140 greater than that of the movable section 150, the first section 111 and the second section 112 are made in separate parts, and The way of making the stiffness of the first segment 111 greater than the stiffness of the second segment 112 , while the stiffness of the first segment 123 is greater than that of the second segment 124 when the second outer layer 122 is provided. In addition, in order to improve the connection strength of the connection between the body segment 140 and the movable segment 150 , when the reinforcement layer 120 is provided, the first subsection 123 and the second subsection 124 can be overlapped at the connection between the movable segment 150 and the body segment 140 . , to further increase the stiffness of its joints.

It should be noted that, in other embodiments of the present invention, the first segment 111 and the second segment 112 are made in a split manner, and the stiffness of the first segment 111 is greater than that of the second segment 112 In the manner of stiffness, the stiffness of the first sub-section 123 of the second outer layer 122 may be the same as the stiffness of the second sub-section 124 .

In addition, when the first segment 111 and the second segment 112 are fabricated in one piece, the stiffness of the first segment 111 may also be greater than that of the second segment 112 .

Based on the above-mentioned catheter 100, please refer to FIG. 1-FIG. 3, FIG. 2 shows the structure of the catheter and the handle in the embodiment of the present invention; the present invention also provides an endoscopic device, which includes a functional end 210, a handle 220 and the catheter 100 described above.

The functional end 210 is connected to the distal end of the movable segment 150 , and the handle 220 is connected to the proximal end of the body segment 140 .

The functional end 210 includes a camera and a plurality of connection channels, and the plurality of connection channels are in a one-to-one correspondence with the wire channel 160 and the functional channel 130 .

The handle 220 includes a handle body 221, a turning wheel 222, a cable and at least two manipulation wires 223; the turning wheel 222 is rotatably connected to the handle body 221; one end of the two manipulation wires 223 is connected to the turning wheel 222, and is located at the turning wheel 222 respectively. On both sides of the wheel 222 , the other ends of the two manipulation wires 223 pass through the wire body channel 160 and then connect to the corresponding connection channel; the cable passes through the functional channel 130 and is electrically connected to the camera.

Further, in this embodiment, the handle 220 may include two runners 222 and four manipulation wires 223, and each runner 222 is correspondingly connected to two manipulation wires 223; the tube body 110 is provided with four wire bodies For the channel 160, the four wire channels 160 are respectively for one manipulation wire 223 to pass through; and the functional end 210 is provided with four connection channels corresponding to the wire channels 160 one-to-one.

Thus, one end of the four manipulation wires 223 is respectively connected with the corresponding runner 222 , and the other ends of the four manipulation wires 223 pass through the wire body channel 160 on the tube body 110 correspondingly and then connect with the corresponding connection channel on the functional end 210 .

Then, by turning the wheel 222 on the handle 220, the functional end 210 can be driven to squeeze the movable segment 150, thereby causing the movable segment 150 to deform and bend, so as to change the direction of the functional end 210 through the bending of the movable segment 150, thereby adjusting the camera's orientation. Video recording direction to meet the diagnostic requirements of visualization of endoscopic equipment.

100 type, for those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims (10)

1. A catheter, characterized by:

the catheter comprises a tube body and a reinforcing layer;

the pipe body comprises a first section and a second section; at least one functional channel is arranged in each of the first section and the second section, and the functional channel in the first section is correspondingly communicated with the functional channel in the second section;

the reinforcing layer is coated on the outer peripheral surface of the pipe body, the reinforcing layer coated on the outer periphery of the first section and the first section form a body section together, and the reinforcing layer coated on the outer periphery of the second section and the second section form a movable section together;

the stiffness of the body section is greater than the stiffness of the active section.

2. The catheter of claim 1, wherein:

the reinforcing layer comprises a first outer layer and a second outer layer;

the second outer layer comprises a first subsection and a second subsection, the first subsection is correspondingly located on the periphery of the first subsection, and the second subsection is correspondingly located on the periphery of the second subsection.

3. The catheter of claim 2, wherein:

the stiffness of the first subsection is greater than the stiffness of the second subsection.

4. The catheter of claim 2, wherein:

the first and second sections overlap at a junction of the first segment and the second segment.

5. The catheter of claim 2, wherein:

the first outer layer is a metal mesh grid;

the second outer layer is made of a high polymer material.

6. The catheter of claim 1, wherein:

the first section and the second section are at least internally provided with two line body channels for the control lines to pass through, and the two line body channels in the first section are communicated with the two line body channels in the second section in a one-to-one correspondence manner.

7. The catheter of claim 6, wherein:

the inner diameter of the wire body channel is smaller than that of the function channel.

8. The catheter of any one of claims 2-7, wherein:

the first section and the second section are integrally formed.

9. The catheter of any one of claims 1-7, wherein:

the first section and the second section are made in a split mode, and the rigidity of the first section is larger than that of the second section.

10. An endoscopic apparatus, characterized by:

the endoscopic apparatus comprising a functional end, a handle and a catheter according to any of claims 1-9; the functional end is connected with the far end of the movable section, and the handle is connected with the near end of the body section;

the function end comprises a camera and a plurality of connecting channels, and the connecting channels are communicated with the line body channel and the function channel in a one-to-one correspondence manner;

the handle comprises a handle body, a rotating wheel, a cable and at least two control wires; the rotating wheel is rotatably connected with the handle body; one ends of the two control wires are connected with the rotating wheel and are respectively positioned at two sides of the rotating wheel, and the other ends of the two control wires penetrate through the wire body channel and are connected with the corresponding connecting channels; the cable penetrates through the functional channel and is connected with the camera.

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