Tube placing device for medical built-in tube

Abstract

The utility model belongs to the technical field of medical instruments, and particularly relates to a medical built-in tube indwelling device which comprises an outer tube, a snake bone tube arranged at the front end of the outer tube, an adjusting rope used for driving the snake bone tube to bend, and an adjusting guide wheel used for driving the adjusting rope to stretch out and draw back. The adjusting guide wheel is rotationally arranged in the outer pipe through a fixed shaft of a rotating shaft perpendicular to the outer pipe; the device further comprises a push rod which extends into the outer pipe and is used for driving the adjusting guide wheel to rotate. During use, the outer pipe is held by hand, the rear end of the push rod is pushed forwards, the push rod drives the adjusting guide wheel to rotate towards one side and drives the adjusting rope to contract, and the snake bone pipe is bent towards one side to change the direction; when the rear end of the push rod is pulled backwards, the push rod can drive the adjusting guide wheel to rotate in the opposite direction and drive the adjusting rope to extend and reset, then the snake bone pipe is bent in the opposite direction to change the direction and reset, medical staff can conveniently guide the direction of the built-in pipe when placing the built-in pipe into the body of a patient, operation is easy, and practicability is high. The structural size is small.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, and particularly relates to a catheterization device for a medical internal catheter. Background Art

[0002] Endoscopes are widely used in industries, medical fields, pipelines, explosion-proof and other fields for detecting abnormal conditions. For example, they are used for detecting the inside of small-diameter cavities. In particular, in the medical industry, endoscopes with front ends that can be adjusted to turn at multiple angles are often used to detect the inside of cavities such as the human lungs, gastrointestinal tract, or esophagus, so as to facilitate doctors to take accurate treatment measures. In addition, in some cases, medical staff also need to insert a gastrointestinal nutrition tube into the corresponding position of the gastrointestinal tract. However, since the front end of the nutrition tube cannot be adjusted in angle after being inserted a certain length, it is impossible to continue moving forward. At this time, an endoscope needs to be inserted into the nutrition tube to assist in adjusting the angle of the front end of the nutrition tube. However, the existing angle adjustment structures of current endoscopes have problems such as complex structures, large volumes, and high manufacturing costs of the adjustment structures. Therefore, we have specifically developed a catheterization device for a medical internal catheter. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a catheterization device for a medical internal catheter to solve the problems raised in the background art.

[0004] To achieve the above purpose, the utility model provides the following technical solution: A catheterization device for a medical internal catheter, the device includes an outer tube, a snake bone tube provided at the front end of the outer tube, an adjustment cable for driving the snake bone tube to bend, and an adjustment guide wheel for driving the adjustment cable to stretch and retract; the adjustment guide wheel is rotatably arranged in the outer tube through a rotating shaft perpendicular to the outer tube; the device further includes a push rod extending into the outer tube and used for driving the adjustment guide wheel to rotate. [[ID=1,7]]

[0005] In the catheterization device for a medical internal catheter of the utility model, two adjustment cables are provided and are oppositely arranged on both sides of the snake bone tube. One of the adjustment cables bypasses the guide wheel and is connected to the outer tube, and the other adjustment cable is connected to the push rod.

[0006] In the catheterization device for a medical internal catheter of the utility model, the push rod is in sliding fit with the circumferential side wall of the adjustment guide wheel. When the push rod moves axially back and forth, it drives the adjustment guide wheel to rotate back and forth, realizing the telescopic adjustment of the two adjustment cables.

[0007] For the catheter placement device of the medical internal catheter described in the present utility model, wherein a fixing frame which is in interference fit with the inner wall thereof is arranged inside the outer tube, a rotating shaft of the adjusting guide wheel is arranged on the fixing frame, an insertion hose connected to the fixing frame is arranged at the front end of the outer tube, the snake bone tube is arranged at the front end of the insertion hose, and the corresponding adjusting cable is connected to the outer tube through the fixing frame.

[0008] For the catheter placement device of the medical internal catheter described in the present utility model, wherein the rear end of the push rod extends out of the rear end of the outer tube.

[0009] For the catheter placement device of the medical internal catheter described in the present utility model, wherein the push rod is coaxially arranged with the outer tube, and a guiding assembly for guiding the push rod is further arranged inside the outer tube.

[0010] For the catheter placement device of the medical internal catheter described in the present utility model, wherein the guiding assembly includes a rod core bushing coaxially sleeved on the push rod, the rod core bushing is located at the rear side of the adjusting guide wheel and is in interference fit with the inner wall of the outer tube, and the inner wall of the rod core bushing is in sliding fit with the push rod.

[0011] For the catheter placement device of the medical internal catheter described in the present utility model, wherein a stop member is arranged on the side wall of the push rod at the rear side of the rod core bushing, the guiding assembly further includes a guiding tube for axially guiding the stop member, and the guiding tube is connected to the rear end of the rod core bushing.

[0012] For the catheter placement device of the medical internal catheter described in the present utility model, wherein the rear end of the guiding tube extends out of the rear end of the outer tube, a plug is detachably arranged inside the rear end of the guiding tube, a movable through hole adapted to the push rod is arranged on the plug, the rear end of the push rod passes through the movable through hole and is provided with an operating handle, and the operating handle is detachably connected to the push rod.

[0013] In addition, the present utility model can provide an operating method for the catheter placement device of the medical internal catheter, and the method includes the following steps;

[0014] Hold the outer tube by hand;

[0015] Push the rear end of the push rod forward, drive the adjusting guide wheel to rotate towards one side through the push rod and drive the adjusting cable to contract, so as to realize that the snake bone tube bends and changes direction towards one side;

[0016] Pull the rear end of the push rod backward, drive the adjusting guide wheel to rotate towards the other side through the push rod and drive the adjusting cable to extend and reset, so as to realize that the snake bone tube bends and changes direction towards the other side and resets.

[0017] Compared with the prior art, the beneficial effects of the present utility model are as follows: simple structure, small size, lower cost, and more convenient operation; when in use, hold the outer tube by hand and push the rear end of the push rod forward. The push rod drives the adjusting guide wheel to rotate to one side and drives the adjusting cable to contract, so as to bend the snake bone tube to one side and change the direction; when pulling the rear end of the push rod backward, the push rod can drive the adjusting guide wheel to rotate in the opposite direction and drive the adjusting cable to extend and reset, thereby realizing the bending of the snake bone tube in the opposite direction to change the direction and reset, which is convenient for medical staff to guide the direction of the built-in tube when inserting the built-in tube into the patient's body. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0019] Figure 1 The external view of the present invention.

[0020] Figure 2 The internal structure diagram of the present invention.

[0021] Figure 3 For Figure 2 partial structure diagram.

[0022] Figure 4 For Figure 2 partial structure diagram.

[0023] Figure 5 The overall structure diagram of the fixing bracket of the present invention in the figure. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] The terms "first", "second", "third", "fourth", etc. in the specification, claims and drawings of the present utility model are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally further include steps or units not listed, or may optionally further include other steps or units inherent to these processes, methods, products or devices.

[0025] The mention of "embodiment" in this text means that the specific features, structures or characteristics described in connection with the embodiment may be included in at least one embodiment of the present utility model. The occurrence of this phrase at various positions in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0026] "Plurality" means two or more. "And / or" describes the association relationship of associated objects and indicates that there can be three relationships. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. The character " / " generally represents an "or" relationship between the associated objects before and after.

[0027] Moreover, terms indicating directions such as "upper, lower, left, right, upper end, lower end, longitudinal" etc. are all referenced based on the posture position of the device or equipment described in this solution during normal use.

[0028] In order to make the objectives, 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. Obviously, the described embodiments are partial embodiments of the present utility model, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts fall within the protection scope of the present utility model.

[0029] This embodiment discloses as Figures 1 to 5The catheter placement device for the medical internal catheter shown, which device includes an outer tube 10, a snake bone tube 20 coaxially arranged at the front end of the outer tube 10, an adjustment cable 30 for driving the snake bone tube 20 to bend, and an adjustment guide wheel 40 for driving the adjustment cable 30 to stretch and contract; the adjustment cable 30 is generally a flexible steel wire, and of course it can also be a nylon rope. The adjustment guide wheel 40 is rotatably arranged in the outer tube 10 by a fixed-axis rotation through a rotating shaft 41 perpendicular to the outer tube 10; further, the device also includes a push rod 50 with its front end extending into the outer tube 10 and used for driving the adjustment guide wheel 40 to rotate. The driving method can be that the push rod 50 is directly attached to the circumferential side wall of the adjustment guide wheel 40, and when the push rod 50 moves back and forth, it can drive the adjustment guide wheel 40 to rotate; in addition, the driving method can also be that the push rod 50 is attached to the circumferential side wall of the rotating shaft of the adjustment guide wheel 40, and this setting method can also achieve driving the adjustment guide wheel 40 to rotate when the push rod 50 moves back and forth; the overall structure of the device is simple, small in size, and lower in cost. Compared with the defect that the traditional snake bone tube 20 orientation adjustment scheme uses multiple adjustment handles, resulting in complex operation and easy operation errors, this device only has one operating component - the push rod 50, and only needs to push the push rod 50 back and forth to achieve adjustment, making the operation more convenient; specifically in use, hold the outer tube 10, push the rear end of the push rod 50 forward, drive the adjustment guide wheel 40 to rotate to one side through the push rod 50 and drive the adjustment cable 30 to contract, so as to realize the bending of the front end of the snake bone tube 20 to one side to change the direction; and when pulling the rear end of the push rod 50 backward, the adjustment guide wheel 40 can be driven by the push rod 50 to rotate in the opposite direction and drive the adjustment cable 30 to extend and reset, thereby realizing the bending of the snake bone tube 20 to the opposite side to change the direction and reset, and further facilitating the medical staff to guide the direction of the internal catheter when placing the internal catheter into the patient's body.

[0030] In this embodiment, there are two adjustment cables 30 and they are arranged oppositely on both sides of the snake bone tube 20. One adjustment cable 30 is connected to the outer tube 10 after bypassing the circumferential side wall of the guide wheel, and the other adjustment cable is directly connected to the push rod 50. Thus, when the push rod 50 moves forward, it drives the adjustment guide wheel 40 to drive the corresponding adjustment cable 30 to contract through the push rod 50, making the front end of the snake bone tube 20 bend to one side. At the same time, the adjustment cable 30 on the other side of the snake bone tube 20 moves forward, avoiding the conflict between the movements of the two adjustment cables 30; when the push rod 50 moves backward, the adjustment cable 30 corresponding to the adjustment guide wheel 40 resets and extends, and the other adjustment cable 30 directly connected to the push rod 50 is pulled backward by the push rod 50, thereby making the snake bone tube 20 bend to the other side, realizing that only one operating part - the push rod 50 can complete the change of the snake bone tube 20 in two directions, and there is no risk of operating the wrong handle for the medical staff during operation.

[0031] In this embodiment, it is preferable that the push rod 50 is in sliding contact with the circumferential side wall of the adjusting guide wheel 40. When the push rod 50 reciprocates back and forth, the adjusting guide wheel 40 is driven to rotate reciprocally through the frictional force between the two, so as to realize the telescopic adjustment of the two adjusting cables 30. Further, in order to prevent the push rod 50 and the adjusting guide wheel 40 from slipping with the adjusting cable 30, the adjusting cable 30 can be placed between the push rod 50 and the guide wheel, and the frictional force between the adjusting cable 30 and the adjusting guide is increased through the extrusion force between the two, thereby ensuring the synchronous movement of the adjusting guide wheel 40 and the adjusting cable 30. In addition, an annular positioning groove adapted to the adjusting cable 30 can be provided on the side wall of the adjusting guide wheel 40 to prevent the adjusting cable 30 from shifting.

[0032] Further, a step 51 communicating with its front end face is recessed on the front end side wall of the push rod 50. An avoidance groove 52 for avoiding the adjusting cable 30 connected to the adjusting guide wheel 40 is provided on the side wall of the step 51 parallel to the axis of the push rod 50. A channel 53 penetrating through the rear end of the push rod 50 is provided on the side wall of the step 51 perpendicular to the axis of the push rod 50. The front end of the channel 53 is directly communicated with the avoidance groove 52. The channel 53 and the avoidance groove 52 together form a wiring channel for the connection wire of the camera to pass through, so as to facilitate installation and assembly.

[0033] In this embodiment, a fixing frame 60 which is in interference fit with the inner wall is provided inside the outer tube 10. The rotating shaft of the adjusting guide wheel 40 is arranged on the fixing frame 60. An insertion hose 70 connected to the fixing frame 60 is provided at the front end of the outer tube 10. The rear end of the insertion hose 70 extends into the outer tube 10 and is coaxially fixed on the fixing frame 60. The snake bone tube 20 is arranged at the front end of the insertion hose 70. The adjusting cable 30 is connected to the snake bone tube 20 through a channel 71 in the inner wall of the insertion hose 70. The inner cavity 72 of the insertion hose 70 is used for installing the camera and its connection wire. The adjusting cable 30 corresponding to the adjusting guide wheel 40 is fixed to the outer tube 10 through the fixing frame 60, so that the insertion hose 70, the mounting frame and the push rod 50 can be taken out from the front end of the outer tube 10 during installation and disassembly, which can greatly reduce the assembly difficulty and further increase the production efficiency.

[0034] In this embodiment, the rear end of the push rod 50 extends out of the rear end of the outer tube 10 to facilitate the forward and backward pushing operation of the operator.

[0035] In this embodiment, the push rod 50 is coaxially arranged with the outer tube 10. A guiding assembly 80 for guiding the push rod 50 is further provided inside the outer tube 10 to ensure the stability of the push rod 50 during the reciprocating movement back and forth. Specifically, the guiding assembly 80 includes a rod core bushing 81 coaxially sleeved on the push rod 50. The rod core bushing 81 is located at the rear side of the adjusting guide wheel 40 and is in interference fit with the inner wall of the outer tube 10, playing a role of positioning and preventing movement. The inner wall of the rod core bushing 81 is in sliding fit with the push rod 50 to provide a smooth guide for the reciprocating movement of the push rod 50 back and forth; further, the rod core bushing 81 is integrally provided with the fixing frame 60. The front ends of the rod core bushing 81 and the fixing frame 60 are both cylindrical. The rear end of the fixing frame 60 is two connecting arms parallel to each other, and the two connecting arms connect the rod core bushing 81; among them, in order to facilitate the lead-out of the connecting wire of the camera from the outer tube and avoid conflicts with the installation of the push rod, a lead-out tube 120 is provided at a position corresponding to the two connecting arms on the outer side wall of the outer tube. The lead-out tube 120 radially penetrates the inner cavity of the outer tube.

[0036] In this embodiment, a stop member 54 is provided on the side wall of the push rod 50 at the rear side of the rod core bushing 81. Preferably, the stop member 54 is of an annular structure. Further, the guiding assembly 80 further includes a guiding tube 82 for axially guiding the stop member 54. The guiding tube 82 is connected to the rear end of the rod core bushing 81. The guiding tube 82 is coaxially sleeved on the outer side wall of the rear end of the rod core bushing 81. An annular step 811 adapted to the guiding tube 82 is recessed on the outer side wall of the rear end of the rod core bushing 81. After being assembled in place, the fixing frame 60, the rod core bushing 81, and the guiding tube 82 form a cylindrical structural member. The outer side wall of the cylindrical structural member is in close fit with the inner wall of the outer tube 10. By providing the guiding outer tube 10, the running stability of the stop member 54 can be effectively ensured.

[0037] In this embodiment, the rear end of the guiding tube 82 extends out of the rear end of the outer tube 10. A plug 90 is detachably provided inside the rear end of the guiding tube 82. Specifically, the plug 90 is threadedly connected to the guiding tube 82. An activity through hole 91 adapted to the push rod 50 is provided on the plug 90 to further play a role of guiding and limiting the rear end of the push rod 50. The rear end of the push rod 50 passes through the activity through hole 91 and is provided with an operation handle 100. The operation handle 100 is in a circular ring shape and is detachably connected to the push rod 50 to facilitate the pushing and pulling operations of medical staff; in addition, an outer sleeve 110 is coaxially and fixedly sleeved on the outer side wall of the outer tube 10. An annular groove 111 is circumferentially provided on the outer side wall of the outer sleeve to facilitate the medical staff to hold and grasp.

[0038] In addition, this embodiment also provides an operation method of this device. The method includes the following steps;

[0039] Hold the outer tube 10;

[0040] Push the rear end of the push rod 50 forward, drive the adjusting guide wheel 40 to rotate to one side through the push rod 50 and drive the adjusting cable 30 to contract, so as to realize the bending and direction change of the snake bone tube 20 to one side;

[0041] Pull the rear end of the push rod 50 backward, drive the adjusting guide wheel 40 to rotate to the other side through the push rod 50 and drive the adjusting cable 30 to extend and reset, so as to realize the bending and direction change of the snake bone tube 20 to the other side and reset.

[0042] It should be understood that those of ordinary skill in the art can make improvements or transformations according to the above description, and all such improvements and transformations should fall within the protection scope of the appended claims of the present utility model.

Claims

1. A catheterization device for a medical internal catheter, characterized in that, The device includes an outer tube, a snake bone tube provided at the front end of the outer tube, an adjustment cable for driving the bending of the snake bone tube, and an adjustment guide wheel for driving the telescopic movement of the adjustment cable; the adjustment guide wheel is rotatably arranged in the outer tube through a rotating shaft perpendicular to the outer tube; the device further includes a push rod extending into the outer tube and for driving the rotation of the adjustment guide wheel.

2. The catheter placement device for the medical internal catheter according to claim 1, wherein, There are two adjustment cables which are oppositely arranged on both sides of the snake bone tube. One adjustment cable bypasses the guide wheel and is connected to the outer tube, and the other adjustment cable is connected to the push rod.

3. The catheter placement device for the medical internal catheter according to claim 2, characterized in that, The push rod is in sliding fit with the circumferential side wall of the adjustment guide wheel. When the push rod moves axially back and forth, it drives the adjustment guide wheel to rotate back and forth, realizing the telescopic adjustment of the two adjustment cables.

4. The catheter placement device for the medical internal catheter according to claim 2, characterized in that, A fixing frame in interference fit with the inner wall of the outer tube is provided in the outer tube. The rotating shaft of the adjustment guide wheel is arranged on the fixing frame. An insertion hose connected to the fixing frame is provided at the front end of the outer tube. The snake bone tube is arranged at the front end of the insertion hose. The corresponding adjustment cable is connected to the outer tube through the fixing frame.

5. The catheter placement device for the medical indwelling tube according to claim 4, characterized in that, The rear end of the push rod extends out of the rear end of the outer tube.

6. The catheter placement device for the medical internal catheter according to claim 5, characterized in that, The push rod is coaxially arranged with the outer tube. A guiding component for guiding the push rod is further provided in the outer tube.

7. The catheter placement device for the medical internal catheter according to claim 6, wherein, The guiding component includes a rod core bushing coaxially sleeved on the push rod. The rod core bushing is located at the rear side of the adjustment guide wheel and is in interference fit with the inner wall of the outer tube. The inner wall of the rod core bushing is in sliding fit with the push rod.

8. The catheter placement device for the medical internal catheter according to claim 7, characterized in that, A stop member is provided on the side wall of the push rod at the rear side of the rod core bushing. The guiding component further includes a guiding tube for axially guiding the stop member. The guiding tube is connected to the rear end of the rod core bushing.

9. The catheter placement device for the medical internal catheter according to claim 8, characterized in that, The rear end of the guiding tube extends out of the rear end of the outer tube. A plug is detachably arranged in the rear end of the guiding tube. An activity through hole adapted to the push rod is provided on the plug. The rear end of the push rod passes through the activity through hole and is provided with an operation handle. The operation handle is detachably connected to the push rod.

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