Working channel regulation and control type medical endoscope

Abstract

According to the working channel regulation and control type medical endoscope, a snooping assembly (112) is arranged in the area of an endoscope catheter head (11), an endoscope catheter (1) is provided with a working channel (10) penetrating through the head and the tail, the working channel regulation and control type medical endoscope further comprises a protruding body (2), the protruding body (2) is composed of a protruding body head (21), a protruding body middle part (22) and a protruding body connecting part (23), and the protruding body (2) is connected with the area of the endoscope catheter head (11) through the protruding body connecting part (23); the device further comprises an expandable body (24) arranged adjacent to the protruding body (2) or integrally connected with the protruding body (2), the size of an expandable body inner cavity (240) is increased after fluid is filled, and during use, external fluid enters the expandable body inner cavity through the fluid passage (15), so that an expandable body free part (242) which deforms and expands towards the area of the inner opening (101) of the working channel makes contact with and presses the functional tube wire (L), and the functional tube wire (L) is expanded. And the bending degree and / or the bending direction of the functional pipe wire extending out of the opening in the working channel are / is regulated and controlled.

Description

Technical Field

[0001] The utility model relates to a working channel regulating medical endoscope, belonging to the technical field of medical equipment products. Background Art

[0002] When used, existing medical endoscopes enter natural cavities or pathological sinus passages of living organisms to perform operations such as biopsy, tissue ablation, electroresection, laser lithotripsy, etc. Some waste materials are located in sinuses, appendix, renal calyx, etc. When the waste materials are crushed and extracted by the functional tube wire, the top of the functional tube wire needs to be aimed at the waste materials; for example, when the target stone is located in the renal calyx, the top of the laser fiber needs to be aimed at the stone to crush it into stone fragments, but some stones with tricky positions and angles often exceed the range of motion of the head of the ureteroscopic endoscope catheter. Functional tube wires such as laser fibers that enter through the working channel of the endoscope catheter cannot adjust the bending direction to align with the stone under visual conditions, and the lithotripsy operation cannot be effectively performed and normal tissue mucosa may be accidentally injured. Currently, there is no method to change the direction of the top of the functional tube wire in use to align with the stone and other waste materials for operation. Summary of the invention

[0003] The utility model relates to a working channel regulating medical endoscope, which uses the deformable performance of the free part of the expandable body to bend the functional tube wire in a visible state, so as to align with waste materials such as stones during the operation and perform clinical operations such as lithotripsy.

[0004] The purpose of the utility model is achieved as follows: a working channel controllable medical endoscope, wherein the head region of the endoscope catheter is provided with a peep assembly, the endoscope catheter is provided with a working channel running through the head and tail, the working channel is provided with an inner opening of the working channel that enters the body when in use and an outer opening of the working channel that is located outside the body, and also includes a protrusion, at least a part of the protrusion protrudes in a direction away from the top of the endoscope catheter head, the protrusion is composed of a protrusion head, a protrusion middle part, and a protrusion connecting part, and the protrusion is connected to the head region of the endoscope catheter through the protrusion connecting part; and also includes an expandable body that is arranged adjacent to or connected to the protrusion as a whole, the volume of the expandable body cavity increases after the fluid is filled into the expandable body cavity, so that the free part of the expandable body expands and deforms at least toward the inner opening region of the working channel; a fluid passage is provided on the endoscope catheter, and when in use, the fluid enters the expandable body cavity through the outer opening of the fluid passage, the fluid passage, and the inner opening of the fluid passage, so that the free part of the expandable body that is deformed and expanded toward the inner opening region of the working channel contacts and presses the functional tube wire, thereby regulating the bending degree and / or bending direction of the functional tube wire extending from the inner opening of the working channel.

[0005] The endoscope catheter can be used in conjunction with a sheath tube, and the top end of the endoscope catheter head can extend from an opening in the sheath tube when in use.

[0006] The protrusion has an inner side surface of the protrusion and an outer side surface of the protrusion. Preferably, the peripheral area of ​​the expandable body is sealed and connected to the inner side surface of the protrusion to form an expandable body cavity. Of course, the peripheral area of ​​the expandable body may also be partially sealed and connected to the outer side surface of the protrusion, such as the expandable body passes over the top of the protrusion head and is sealed and connected to the outer side surface of the protrusion.

[0007] The tail of the endoscope catheter can be connected to a handle for easy operation, and the handle is connected to a control rod which can control the bending direction and / or bending degree of the top end of the endoscope catheter head.

[0008] The expandable body is arranged adjacent to the protrusion, and the expandable body is an independent sac-like structure. Preferably, the sac-like expandable body is located on the inner side of the protrusion; the expandable body and the protrusion are connected as one body, and the expandable body can be an independent deformable component, and the peripheral area of ​​the expandable body is sealed and connected to the protrusion as a whole, and the expandable body and the protrusion together form the expandable body cavity, and the expandable body can also be a part on the protrusion that is easy to deform.

[0009] The top end area of ​​the endoscope catheter head may be the top end of the endoscope catheter head, or may be an adjacent area to the top end of the endoscope catheter head.

[0010] The external area of ​​the opening in the working channel can be adjusted after the expandable body expands and deforms, which means that the opening in the working channel is blocked to different degrees due to the different expansion degrees of the expandable body. When the perfusion fluid is injected from the working channel, the cross-sectional area of ​​the perfusion fluid flowing out of the opening in the working channel changes, resulting in obstruction of the outflow of the perfusion fluid, and the flow direction of the perfusion fluid will also change at the same time, which has the effect of regulating the outflow amount, flow rate and flow direction of the perfusion fluid.

[0011] The functional tube filaments extending from the opening in the working channel usually include various guide wires, ablation catheters, pressure sensing catheters / guide wires, therapeutic injection catheters, laser optical fibers, etc. In order to better play the role of the functional tube filaments, when the free part of the expandable body expands and deforms toward the space in front of the opening in the working channel, it can squeeze the functional tube filaments located in the working channel, so that the functional tube filaments protruding from the opening in the working channel are bent. If the functional tube filament is a laser lithotripsy optical fiber, the top of the bent optical fiber head is easier to touch the stones located on the side of the top of the endoscope catheter head, thereby successfully completing the subsequent lithotripsy operation.

[0012] During use, external fluid is injected into the fluid passage through the external opening of the fluid passage located outside the body, and then enters the inner cavity of the expandable body through the inner opening of the fluid passage. The fluid can directly enter the inner cavity of the expandable body through the inner opening of the fluid passage, or the fluid can first enter the internal passage of the protrusion and then enter the inner cavity of the expandable body.

[0013] The protrusion is integrated with the endoscope catheter or the two are connected in an easily detachable manner.

[0014] In order to ensure the compressive force of the expandable body on the functional tube, when the expandable body expands and deforms, the strength of the middle part of the protrusion should prevent it from deforming outward or only slightly deforming; the middle part of the protrusion can be made of hard material or a hard sheet can be embedded in the flexible material or reinforcing ribs can be set.

[0015] In order to avoid damaging human tissue during use, the protrusion head can be made of flexible materials according to clinical needs.

[0016] In order to facilitate passing through the narrow part of the natural cavity, at least the head of the protrusion is offset or bent toward the central axis of the endoscope catheter or the central axis of the working channel.

[0017] In order to facilitate the passage through the special structure at the connection between the bladder and the ureter - the Waldeyer sheath, one or more locally petal-shaped protrusions are connected to the head area of ​​the endoscopic catheter, and the petal-shaped protrusions can cleverly pick up the Waldeyer sheath tissue; when only one petal-shaped protrusion is provided, it is preferably provided at a position adjacent to the working channel of the endoscopic catheter; when two petal-shaped protrusions are provided, the two petal-shaped protrusions are preferably provided opposite to each other.

[0018] Furthermore, in order to be able to adjust the deformation direction of the free part of the expandable body, a partially petal-shaped protrusion is connected to the head area of ​​the endoscope catheter, and the protrusion connecting part is in a sleeve-like shape and is rotatably connected to the head of the endoscope catheter. The sleeve-like protrusion connecting part is provided with an annular groove open inwardly, and the annular groove is connected to the opening in the fluid passage of the endoscope catheter.

[0019] In order to save space and shorten the filling path of the fluid into the inner cavity of the expandable body, an extension portion extending toward the distal end is provided at the top of the endoscope catheter head. The inner opening of the fluid passage of the fluid passage on the endoscope catheter is located outside the extension portion, and a portion of the peripheral area of ​​the expandable body is sealed and connected to the extension portion.

[0020] To facilitate assembly, the protrusion connection part is connected to the endoscope catheter head in a sleeve shape, and the inner surface of the protrusion connection part is provided with continuous or intermittent ribs, and the area adjacent to the top of the endoscope catheter head is provided with continuous or intermittent grooves, and the ribs are embedded in the corresponding grooves during assembly; of course, the inner surface of the protrusion connection part can also be provided with grooves, and the corresponding area of ​​the endoscope catheter head can be provided with ribs, and the grooves and ribs cooperate with each other during assembly.

[0021] In order to facilitate the adsorption of foreign objects such as stones, a partially straight or curved protrusion is connected to the head area of ​​the endoscope catheter, and foreign objects such as stones can be adsorbed by the opening on the protrusion; when the working channel is connected to negative pressure, the opening on the protrusion with a diameter larger than the opening in the working channel becomes a negative pressure suction port, which can adsorb larger stones and move them, while the opening on the curved cylindrical protrusion bends to one side, which helps to adsorb foreign objects such as stones located on the side of the top end of the endoscope catheter head.

[0022] Furthermore, the opening on the protrusion is in a straight or curved trumpet shape so as to absorb large stones or other foreign matter.

[0023] In order to facilitate deformation and more flexible adsorption, a protrusion structure is provided with a plurality of wrinkles at the protrusion head and / or the middle part of the protrusion, and the average thickness of the wrinkles is equal to or less than the middle part of the protrusion.

[0024] In order to rotationally adjust and record the specific position of the expandable body before expansion, the protrusion connecting portion is in the shape of a sleeve and is rotatably connected to the endoscope catheter head. An indicator arrow is provided on the outer surface of the sleeve-shaped protrusion connecting portion, and scale lines and / or text marks are provided in the endoscope catheter head area below the indicator arrow; or scale lines and text marks are provided on the outer surface of the protrusion connecting portion and an indicator arrow is provided in the endoscope catheter head area.

[0025] In order to facilitate related operations under visualization, at least the middle portion of the protrusion, the head of the protrusion, and the expandable body are transparent and made of transparent materials.

[0026] Furthermore, in order to reduce the high heat generated when the laser is released during the lithotripsy operation, a small hole is provided on the expandable body. When the inner cavity of the expandable body is filled with liquid fluid to cause the free part of the expandable body to expand and deform to compress the functional tube filament such as the laser fiber to bend, the liquid in the inner cavity of the expandable body flows out through the small hole, thereby better reducing the local high temperature.

[0027] The beneficial effects of the utility model are:

[0028] 1. When the free part of the expandable body deforms and expands toward the opening area in the working channel, it contacts and compresses the functional tube wire, adjusts the bending degree and / or bending direction of the functional tube wire extending from the opening in the working channel, accurately aligns with foreign bodies such as stones under the premise of visualization, and performs other clinical operations such as lithotripsy.

[0029] 2. After the free part of the expandable body expands and deforms, the degree of blocking of the opening in the working channel varies according to the degree of expansion. When the perfusion fluid is injected from the working channel, the outflow cross-sectional area of ​​the perfusion fluid from the opening in the working channel changes, and the flow direction of the perfusion fluid will also change at the same time, which has the effect of regulating the outflow amount, flow rate and flow direction of the perfusion fluid.

[0030] 3. A through hole is set on the expandable body. When the inner cavity of the expandable body is filled with liquid fluid to cause the free part of the expandable body to expand and deform, the liquid fluid in the inner cavity of the expandable body will simultaneously and quickly flow out toward the top of the laser optical fiber, further reducing the local high temperature caused by the laser release.

[0031] 4. Add a hydrophilic coating to the outer surface of the protrusion, expandable body, and endoscopic catheter to significantly improve its lubrication performance, reduce the resistance through the natural cavity, and further reduce the mechanical damage to the mucosa and other body tissues caused by surgical operations.

[0032] 5. The protrusion has a flap-like or sheet-like structure, which is easy to pass through the narrow part of the natural cavity and also easy to pick open the special structure at the connection between the bladder and the ureter - the Waldeyer sheath, avoiding damage to the Waldeyer sheath tissue when forcing it through.

[0033] 6. After the free part of the expandable body expands significantly, it is easy to push open the natural cavity tissue at the narrow part and pass through the narrow natural cavity smoothly without damaging the human mucosa and other human tissues.

[0034] 7. At least the protrusion head is made of flexible material. When the soft protrusion head contacts the mucous membrane or other biological tissues in the body, it plays a buffering and protective role, ensuring the safety of operation.

[0035] 8. The protrusion connection part is in the shape of a sleeve and is rotatably connected to the endoscope catheter head. An indicator arrow is provided on the outer surface of the protrusion connection part, and scale lines and / or text marks are provided in the endoscope catheter head area to facilitate rotation adjustment and record the specific position of the free part of the expandable body before expansion.

[0036] 9. The inner surface of the protrusion connection part is provided with continuous or discontinuous ribs / grooves, and the endoscope catheter head area is provided with continuous or discontinuous grooves / ribs. During assembly, the ribs are directly embedded in the corresponding grooves, which is simple to operate and easy to assemble and disassemble.

[0037] 10. The opening on the protrusion is straight or curved like a trumpet, which can easily absorb larger stones or other foreign objects.

[0038] 11. The head of the protrusion is provided with a plurality of folds, the thickness of the folds is equal to or less than the middle part of the protrusion, so that it is easy to deform and more flexible to absorb stones or other foreign bodies of different sizes. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] The accompanying drawings which do not limit the present invention are as follows:

[0040] Figure 1A : A three-dimensional schematic diagram of Example 1

[0041] Figure 1B: Partial cutaway diagram of one state of Example 1

[0042] Figure 1C : Partial cutaway diagram of another state of Example 1

[0043] Figure 1D : A three-dimensional schematic diagram of Example 1 showing the expandable body structure

[0044] Figure 2A : Partial cutaway diagram of Example 2, the top of the endoscope catheter head is provided with an extension

[0045] Figure 2B : Partial cutaway diagram of Example 2, a portion of the protrusion is cylindrical

[0046] Figure 2C : Schematic diagram of the cross section of the protrusion and the expandable body in Example 2

[0047] Figure 2D : A three-dimensional schematic diagram of Example 2, in which a portion of the protrusion is cylindrical and connected to the endoscope catheter head

[0048] Figure 3A : Schematic diagram of the cutaway of embodiment 3

[0049] Figure 3B : A partial cutaway diagram of Example 3, with an arrow indicating the connection portion of the protrusion

[0050] Figure 3C : A partial cutaway diagram of Example 3, wherein the protrusion is provided with wrinkles

[0051] Figure 3D : A partial cross-sectional view of Example 3, in which the protrusion is partially bent

[0052] Figure 3E : A partial cutaway diagram of Example 3, in which the opening on the protrusion is horn-shaped

[0053] Figure 4A : A three-dimensional schematic diagram of Example 4

[0054] Figure 4B : Partial cutaway diagram of Example 4

[0055] Figure 4C : A three-dimensional schematic diagram of Example 4, wherein the free portion of the expandable body expands and deforms DETAILED DESCRIPTION

[0056] The embodiments of the present invention are not limited to the following:

[0057] Embodiment 1:

[0058] like Figures 1A-1DThe working channel controllable medical endoscope shown in the figure has an endoscope catheter 1 composed of a head 11, a middle part 12, and a tail 13. The head 11 area of ​​the endoscope catheter 1 is provided with a spying component 112. The endoscope catheter 1 is provided with a working channel 10 that runs through the head and tail. The working channel 10 is provided with an inner working channel opening 101 that enters the body when in use and an outer working channel opening 102 that is located outside the body. The working channel 10 of the endoscope catheter 1 is used for the passage of medical tools when in use, and provides guidance, protection and other corresponding functions for the medical tools located therein, such as various ablation catheters, guide wires, stone baskets, optical fibers, ultrasonic catheters, etc. The tail 13 of the endoscope catheter 1 is connected to a handle 14, and a sealing cap C is provided on the handle 14. Functional tube wires L such as laser optical fibers pass through the sealing cap C to enter the working channel 10. The handle 14 is also provided with a perfusion side branch 142, and the external perfusion side branch opening 143 is connected to the working channel 10 fluid. The perfusion fluid during laser lithotripsy enters the working channel 10 through the perfusion side branch opening 143. Figure 1A The outer opening 102 of the working channel of the endoscope catheter 1 is shown to be located on the handle 14, and the handle 14 is also provided with a control rod 141 for adjusting the bending degree and / or bending direction of the endoscope catheter head 11. The control rod 141 controls the bending member such as a snake bone (omitted in the figure) of the endoscope catheter head 11 through a pull line or the like; it also includes a protrusion 2 connected to the endoscope catheter head 11, at least a part of the protrusion 2 protrudes in a direction away from the top end 111 of the endoscope catheter head 1, and the protrusion 2 is composed of a protrusion head 21, a protrusion middle part 22, and a protrusion connecting part 23. The protrusion 2 is connected to the protrusion connecting part 23 is connected to the head 11 area of ​​the endoscopic catheter 1. In this embodiment, the protrusion 2 has an inner side surface 2a of the protrusion and an outer side surface 2b of the protrusion. The protrusion 2 partially extends and protrudes in a thin sheet-like manner in a direction away from the top 111 of the head of the endoscopic catheter 1. In order to facilitate the passage through the special structure of the connection between the bladder and the ureter - the Waldeyer sheath, at least the protrusion head 21 is offset or bent toward the central axis A0 of the endoscopic catheter or the central axis A1 of the working channel, and at least the protrusion head and the middle part of the protrusion are in a petal-like or sheet-like structure, so as to cleverly pick up the Waldeyer sheath tissue and allow the endoscopic catheter 1 to pass smoothly.

[0059] The head 11 region of the endoscope catheter 1 may be connected to one or more partially petal-shaped protrusions 2. When only one petal-shaped protrusion 2 is provided, it is preferably provided at a position adjacent to the working channel 10 of the endoscope catheter 1. When two petal-shaped protrusions 2 are provided, such as Figure 1D As shown, preferably, two petal-shaped protrusions 2 are arranged opposite to each other; when the protrusions 2 are partially petal-shaped, when the working channel 10 of the endoscope catheter 1 is connected to negative pressure, large stones S can be adsorbed at the opening 101 in the working channel, and when the endoscope catheter 1 moves to a specific area or moves outside the body, the large stones S cling to the inner side 2a of the protrusion, are stably adsorbed by the negative pressure and move synchronously with the endoscope catheter 1.

[0060] In order to change the bending degree and / or bending direction of the functional tube wire L extending from the opening 101 in the working channel, an expandable body 24 is also provided adjacent to or connected to the protrusion 2, such as Figure 1A , 1B As shown, in this scheme, the sheet-like expandable body 24 is sealed and connected to the inner side surface 2a of the protruding body through the peripheral area, forming an expandable body connecting portion 241 and an expandable body free portion 242. The expandable body free portion 242 and the inner side surface 2a of the protruding body together constitute an expandable body cavity 240. After the expandable body cavity 240 is filled with fluid, the volume increases, so that the expandable body free portion 242 of the expandable body 24 expands and deforms at least toward the opening 101 area in the working channel, and because the peripheral area of ​​the expandable body 24 is sealed and connected to the inner side surface 2a of the protruding body, it is ensured that there is no fluid leakage in the expandable body cavity 240; in order to inject fluid into the expandable body cavity 240 from outside the body, the endoscope catheter 1 is A fluid passage 15 is provided. When in use, fluid is injected through the fluid passage outer opening 152 on the fluid passage side branch 150 located outside the body. The fluid enters the expandable body cavity 240 through the fluid passage outer opening 152, the fluid passage 15, and the fluid passage inner opening 151, so that the free portion 242 of the expandable body 24 that is deformed and expanded toward the opening 101 in the working channel contacts and presses the functional tube wire L, thereby regulating the bending degree and / or bending direction of the functional tube wire L extending from the opening 101 in the working channel. The functional tube wire L extending from the opening 101 in the working channel generally includes various guide wires, ablation catheters, pressure sensing catheters / guide wires, injection catheters for treatment, laser optical fibers, etc. Figure 1A , 1B The middle expandable body 24 is in an unexpanded state, and the functional tube filament L is not bent.

[0061] When in use, the fluid enters the expandable body cavity 240 through the fluid passage outer opening 152, the fluid passage 15, and the fluid passage inner opening 151 located outside the body. The fluid may enter the expandable body cavity 240 directly through the fluid passage inner opening 151, or may first enter the expandable body cavity 240 through the protrusion inner passage 25 on the protrusion 2. Figure 1B , 1C Fluid is shown entering the expandable body inner cavity 240 through the protrusion internal passage 25.

[0062] like Figure 1B , 1C As shown, the top end 111 of the endoscope catheter 1 enters the renal pelvis K and the renal calyx K1, and the functional tube wire L (the functional tube wire in this solution is a laser optical fiber) also enters the renal calyx K1 through the endoscope catheter working channel 10 and breaks the stone S into stone fragments under visual conditions. In order to better break the stone, the top end L1 of the functional tube wire, that is, the top end of the laser optical fiber, should face the stone S during stone breaking. Figure 1BThe top L1 of the functional tube wire is not facing the stone S; when the top L1 of the laser fiber cannot face the stone S, under the premise of not moving the endoscope catheter 1, in order to make the functional tube wire L play a better role, Figure 1C As shown, fluid is filled into the expandable body cavity 240 from the outside through the fluid passage 15, and different fluid pressures drive the expandable body free portion 242 to expand and deform to different degrees toward the space in front of the opening 101 in the working channel, occupying the space in front of the opening 101 in the working channel to different degrees, and adjusting the fluid passing cross-sectional area of ​​the opening 101 in the working channel, forcing the functional tube filament L extending from the opening 101 in the working channel to bend to different degrees and / or in different directions, so as to meet the clinical needs of making the top L1 of the laser fiber face the stone S or other needs ( For example, after the expandable body free portion 242 expands and deforms, it clamps the stone S so that the stone is moved out of the body together with the endoscopic catheter 1). At this time, the bent top L1 of the laser fiber head is easier to touch the stone located in the renal pelvis K or the renal calyx K1, so that the subsequent lithotripsy operation can be successfully completed; when the expandable body free portion 242 bends the laser fiber L, the flow direction of the irrigation water flow in the endoscopic catheter 1 also changes due to the position occupied by the expandable body free portion 242. The irrigation water flows toward the top L1 of the laser fiber to better reduce the local high temperature caused by the release of the laser. Figure 1C The middle arrow indicates the direction of irrigation water flow.

[0063] After the expandable body free portion 242 expands and deforms, it regulates the cross-sectional area of ​​the opening 101 in the working channel that is available for the fluid to pass through, that is, the opening 101 in the working channel is blocked to different degrees according to the degree of expansion. When the perfusion fluid is injected from the working channel, the cross-sectional area of ​​the opening 101 in the working channel that is available for the fluid to pass through changes, and the outflow of the perfusion fluid from the opening 101 in the working channel is blocked, and the flow direction of the perfusion fluid will also change at the same time, which has the effect of regulating the outflow amount, flow rate and flow direction of the perfusion fluid.

[0064] The protrusion 2 is arranged adjacent to the expandable body 24, and the expandable body 24 may be an independent sac-like structure and at least part of the expandable body free portion 242 is located on the inner side surface 2a of the protrusion, that is, on the side close to the opening 101 in the working channel. The opening 151 in the fluid passage is connected with the inner cavity 240 of the expandable body. Due to the limiting effect of the protrusion 2, when the inner cavity 240 of the expandable body is filled with fluid, the expandable body 24 will expand toward the opening 101 in the working channel, contact and compress the functional tube wire (figure omitted); the protrusion 2 and the expandable body 24 are connected as a whole, which means that the expandable body 24 can be an independent component, and then be connected to the protrusion 2 partially by bonding, welding, etc. to form the expandable body cavity 240 (such as Figure 1A , 1B, 1C), the expandable body 24 and the protrusion 2 may be integrally formed, the expandable body 24 is an area on the protrusion 2 that is easily deformed, and this area forms an expandable body free portion 242, such as Figure 1D The expandable body 24 on the left is formed integrally with the protrusion 2, that is, the central area of ​​the protrusion 2 forms an expandable body free portion 242. Figure 1D The peripheral area of ​​the expandable body 24 on the right side is sealed and connected to the protrusion 2 as a whole, and the central area of ​​the expandable body 24 forms an expandable body free portion 242.

[0065] The protrusion 2 is integrated with the endoscope catheter 1 or the two are connected in an easily detachable manner. When the expandable body free portion 242 expands and deforms toward the opening 10 in the working channel, the strength of the middle portion 22 of the protrusion should prevent it from deforming outward or only slightly deforming, so as not to weaken the pressure of the expandable body free portion 242 on the laser optical fiber L. The middle portion 22 of the protrusion can be made of hard material or a hard sheet can be embedded in a flexible material or reinforcing ribs can be set (not shown); at least the middle portion 22 of the protrusion, the protrusion head 21, and the expandable body 24 are preferably made of transparent or translucent material. The protrusion head 21 can be made of a flexible material with good compliance, such as silicone rubber, latex, and thermoplastic elastomer, according to clinical needs, so as to avoid mechanical damage to the mucosa and other tissues in the body during use; further, a hydrophilic coating is added to the outer surface of the protrusion 2 and the expandable body 24, and hydrophilic polymer materials such as polyvinyl pyrrolidone, polyacrylamide, polyethylene glycol, and polyvinyl alcohol can be used. Composite antibacterial agents can also be added to the coating to enhance its lubrication properties, reduce contact resistance, and further reduce the mechanical damage to the mucosa and other tissues in the body caused by clinical operations.

[0066] The utility model covers hard and soft medical endoscopes, and the peeping component 112 refers to a combination of one or more of an electronic or optical endoscope component, a pressure sensor, a temperature sensor, a body fluid conductivity sensor, a pH sensor, an ultrasonic probe, etc.; when the protrusion 2 and the expandable body 24 are used, the function of the peeping component 112 is not interfered with or not significantly interfered with.

[0067] Embodiment 2:

[0068] like Figure 2AAs shown, in order to save space and shorten the filling path of the fluid into the expandable body cavity 240, the top end 111 of the head of the endoscopic catheter 1 is provided with an extension portion 113 extending toward the distal end, and the fluid passage inner opening 151 of the fluid passage 15 on the endoscopic catheter 1 is located outside the extension portion 113. In this embodiment, the expandable body 24 is sealed and connected with the extension portion 113 and the inner side surface 2a of the protrusion respectively to form the expandable body cavity 240, and the fluid passage inner opening 151 is located between the extension portion 113 and the protrusion 2. External fluid directly enters the expandable body cavity 240 through the fluid passage inner opening 151, causing the expandable body free portion 242 to expand and deform.

[0069] like Figure 2B , 2C As shown in 2D, the head 11 area of ​​the endoscope catheter 1 is connected to a protrusion 2 that is partially petal-shaped. The protrusion connection part 23 is sleeve-shaped and rotatably connected to the head 11 of the endoscope catheter. The sleeve-shaped protrusion connection part 23 is provided with an inwardly open circumferential groove 230, and the circumferential groove 230 is connected with the opening 151 in the fluid passage of the endoscope catheter 1; in this scheme, the protrusion 2 is provided with a protrusion internal passage 25, and the protrusion internal passage 25 has an upper protrusion internal passage opening 251 that communicates with the expandable body inner cavity 240 and a lower protrusion internal passage opening 252 that connects with the fluid passage internal opening 151, and the lower protrusion internal passage opening 252 stops at the open circumferential groove 230, that is, the external fluid enters the protrusion internal passage 25 through the fluid passage internal opening 151 on the fluid passage 15, the circumferential groove 230, and the lower protrusion internal passage opening 252, and then Then, the protrusion enters the expandable body cavity 240 through the opening 251 on the internal passage of the protrusion, causing the expandable body free portion 242 to expand and deform, and the inner surface of the sleeve-shaped protrusion connecting portion 23 is sealed and connected with the outer surface of the head 11 of the endoscope catheter 1, and the top 232 of the protrusion connecting portion is flush with the top 111 of the head of the endoscope catheter 1. When in use, the protrusion connecting portion 23 and the endoscope catheter head 11 can rotate relative to each other with unchanged axial displacement, that is, the top 232 of the protrusion connecting portion is still flush with the top 111 of the head of the endoscope catheter 1 during rotation, but the middle portion 22 of the protrusion and the protrusion head 21 can change their positions by circular rotation, so that the expandable body free portion 242 can expand in different directions, thereby forcing the functional tube filament L extending from the opening 101 in the working channel to bend in different directions, so as to meet the clinical demand that the top L1 of the laser optical fiber is facing the stone S (figure omitted).

[0070] Embodiment 3:

[0071] like Figure 3A , 3BAs shown, the protrusion connection part 23 is in the shape of a sleeve and is connected to the endoscope catheter head 11. The inner surface of the protrusion connection part 23 is provided with a continuous or discontinuous rib 233. The area of ​​the endoscope catheter head 11 adjacent to the head top 111 is provided with a continuous or discontinuous groove 114. When assembling, the rib 233 is embedded in the corresponding groove 114; of course, the inner surface of the protrusion connection part 23 can also be provided with a groove, and the corresponding area of ​​the endoscope catheter head 11 is provided with a rib, and the groove and the rib cooperate with each other during assembly; in this solution, the inner surface of the protrusion connection part 23 is provided with a rib 233, and a circumferential groove 230 is provided below the rib 233. When assembling, the rib 233 is embedded in the groove 114 provided on the outer surface of the endoscope catheter head 11, and the circumferential groove 230 is aligned with the inner opening of the fluid passage on the endoscope catheter 1 151 are connected correspondingly; in the present embodiment, the protrusion 2 is partially in the shape of a straight cylinder, but may also be in the shape of a curved cylinder. The cylindrical protrusion connecting portion 23 is connected to the endoscope catheter head 11 region. The diameter of the protrusion head 21 gradually decreases toward the distal end, so as to facilitate passage through a narrower position of a natural cavity. The protrusion head 21 is provided with an upper opening 210 on the protrusion, and foreign bodies such as stones S can be adsorbed by the upper opening 210 on the protrusion. When the working channel 10 of the endoscope catheter 1 is connected to negative pressure, the upper opening 210 on the protrusion, which has a diameter larger than the opening 101 in the working channel, becomes a negative pressure suction port, which can adsorb larger stones S and move the stones S, and the upper opening 210 on the curved cylinder can be bent to one side (not shown), which helps to adsorb stones S located on the side of the top end 111 of the head of the endoscope catheter 1.

[0072] Figure 3B The protrusion connection part 23 is shown in the figure as being in the shape of a sleeve and is rotatably connected to the endoscope catheter head 11. An indicator arrow 234 is provided on the outer surface of the sleeve-shaped protrusion connection part 23, and a scale line 115 and / or text mark is provided in the area of ​​the endoscope catheter head 11 below the indicator arrow 234, so as to facilitate rotation and adjustment of the corresponding position of the expandable body free part 242 before expansion. As shown in the figure, the indicator arrow 234 corresponds to the scale line of "number 2" on the endoscope catheter 1, and it can be seen that the expandable body 24 is in the opposite area of ​​the peeping component 112, that is, there is an opening 101 in the working channel between the expandable body 24 and the peeping component 112. When the expandable body free part 242 expands and deforms, the functional tube wire L will be bent in the direction of the peeping component 112. If it is necessary to bend the functional tube wire L in the direction away from the peeping component 112, the protrusion 2 needs to be rotated about 180°.

[0073] like Figure 3C , 3D As shown, the protrusion head 21 is provided with a plurality of folds 211, and the average thickness of the folds 211 is equal to or less than the middle portion 22 of the protrusion. The folded protrusion head 21 is easy to deform and can tightly absorb foreign bodies such as stones S of different shapes and sizes appearing in the vicinity of the opening 210 on the protrusion, thereby taking the stones S out of the body. Figure 3D The protrusion head 21 and the protrusion middle part 22 are bent and offset so as to absorb the stone S on the side of the top end 111 of the endoscope catheter 1; Figure 3E As shown, the diameter of the protrusion head 21 gradually increases toward the distal end, and the opening 210 on the protrusion can be in a straight or curved trumpet shape to absorb large stones S or other foreign matter. In this figure, the opening 210 on the protrusion is in a straight trumpet shape.

[0074] Embodiment 4:

[0075] like Figure 4A , 4B As shown, it also includes a sheath tube 3 used in conjunction with the endoscope catheter 1. When in use, the top end 111 of the head of the endoscope catheter 1 can extend from the sheath tube opening 301 of the sheath tube 3. When in use, the protrusion 2 and the expandable body 24 connected to the head 11 area of ​​the endoscope catheter 1 extend from the sheath tube opening 301 at the same time. In this solution, the protrusion connection part 23 of the protrusion 2 is tubular and rotatably sealed and connected to the endoscope catheter head 11. The middle part 22 of the protrusion gradually narrows toward the protrusion head 21 in a petal shape until the top end of the protrusion head 21 is a rounded arc shape, and the peripheral area of ​​the expandable body 24 is conformably sealed and connected to the protrusion 2; as shown Figure 4C As shown, after the expandable free portion 242 expands, it forces the functional tube filament L to bend toward the stone S, and the top end L1 of the functional tube filament faces the stone S, accurately breaking the stone S into stone fragments.

[0076] In order to reduce the local high temperature caused by the lithotripsy of functional tubes such as laser fibers, Figure 4C At least a small hole is provided on the free portion 242 of the expandable body. When the inner cavity 240 of the expandable body is filled with liquid fluid to make the free portion 242 of the expandable body expand and dilate, the fluid in the inner cavity 240 of the expandable body is released and flows out toward the bending direction of the functional tube wire L through the small hole on the free portion 242 of the expandable body, taking away part of the heat generated when the laser optical fiber releases the laser. The small hole can be formed by acupuncture or laser drilling, and the small hole is in a closed state when the free portion 242 of the expandable body does not expand significantly.

[0077] The positions of various tubes and components in the utility model are described as follows: the head portion is toward the distal end portion, and at least part of it enters the body when in use; the tail portion is toward the proximal end portion, and at least part of it is located outside the body when in use; the inner opening is the distal opening, and the outer opening is the proximal opening; "forward" is toward the distal direction, and "backward" is toward the proximal direction.

[0078] The medical endoscope of the utility model can be used for endoscopic medical operations in various natural cavities including the cardiovascular tract, respiratory tract, lacrimal duct, ear canal, reproductive tract, and digestive tract, or in the third spaces of a living body such as the thoracic cavity and abdominal cavity, and can also be used for medical operations on penetrating wounds, pathological sinus tracts, etc.; specifically, it can be made into a gastroscope, duodenoscope, bronchoscope, nasopharyngeal laryngoscope, ureteroscope, cystoscope, hysteroscope, colposcope, arthroscope, etc.

Claims

1. A working channel controllable medical endoscope, wherein a peep assembly (112) is provided in the head (11) region of an endoscope catheter (1), and the endoscope catheter (1) is provided with a working channel (10) running through the head and tail, wherein the working channel (10) has an inner working channel opening (101) for entering the body during use and an outer working channel opening (102) located outside the body, and is characterized in that: The apparatus also includes a protrusion (2), at least a portion of which protrudes in a direction away from the top end (111) of the head of the endoscope catheter (1), the protrusion (2) being composed of a protrusion head (21), a protrusion middle portion (22), and a protrusion connection portion (23), and the protrusion (2) being connected to the head (11) region of the endoscope catheter (1) via the protrusion connection portion (23); and also includes an expandable body (24) disposed adjacent to the protrusion (2) or connected to the protrusion (2) as a whole, wherein the volume of the expandable body cavity (240) increases after being filled with fluid, so that the free portion of the expandable body is (242) the region at least toward the opening (101) in the working channel expands and deforms; a fluid passage (15) is provided on the endoscope catheter (1), and when in use, external fluid enters the expandable body cavity (240) through the outer opening (152) of the fluid passage, the fluid passage (15), and the inner opening (151) of the fluid passage, so that the free portion (242) of the expandable body that is deformed and expanded toward the opening (101) in the working channel contacts and compresses the functional tube wire (L), thereby regulating the bending degree and / or bending direction of the functional tube wire (L) extending from the opening (101) in the working channel.

2. The working channel controllable medical endoscope according to claim 1, characterized in that: At least the protrusion head (21) is offset or bent toward the central axis (A0) of the endoscope catheter or the central axis (A1) of the working channel.

3. The working channel controllable medical endoscope according to claim 1, characterized in that: The head (11) region of the endoscope catheter (1) is connected to one or more protrusions (2) which are partially petal-shaped.

4. The working channel controllable medical endoscope according to claim 1, characterized in that: The head (11) region of the endoscope catheter (1) is connected to a protrusion (2) which is partially in the shape of a petal. The protrusion connection portion (23) is in the shape of a sleeve and is rotatably connected to the head (11) of the endoscope catheter. The sleeve-shaped protrusion connection portion (23) is provided with an inwardly open circumferential groove (230), and the circumferential groove (230) is connected to an opening (151) in the fluid passage of the endoscope catheter (1).

5. The working channel controllable medical endoscope according to claim 1, characterized in that: The top end (111) of the endoscope catheter (1) head is provided with an extension portion (113) extending toward the distal end, and the fluid passage inner opening (151) of the fluid passage (15) on the endoscope catheter (1) is located outside the extension portion (113).

6. The working channel controllable medical endoscope according to claim 1, characterized in that: The protrusion connection part (23) is connected to the endoscope catheter head (11) in a sleeve shape, and the inner surface of the protrusion connection part (23) is provided with continuous or discontinuous ribs (233), and the area of ​​the endoscope catheter head (11) adjacent to the head top (111) is provided with continuous or discontinuous grooves (114), and the ribs (233) are embedded in the corresponding grooves (114) during assembly; or the inner surface of the protrusion connection part (23) is provided with grooves and the area of ​​the endoscope catheter head (11) adjacent to the head top (111) is provided with ribs.

7. The working channel controllable medical endoscope according to claim 1, characterized in that: The endoscope catheter head (11) is connected to a partially straight or curved protrusion (2), and foreign matter such as stones (S) can be adsorbed by an opening (210) on the protrusion.

8. The working channel controllable medical endoscope according to claim 7, characterized in that: The opening (210) on the protrusion is in the shape of a straight or curved trumpet, so as to absorb large stones (S) or other foreign matter.

9. The working channel controllable medical endoscope according to claim 7, characterized in that: The protrusion head (21) and / or the protrusion middle part (22) are provided with a plurality of folds (211), and the average thickness of the folds (211) is equal to or smaller than that of the protrusion middle part (22).

10. The working channel controllable medical endoscope according to claim 1, characterized in that: A through hole is provided on the free part (242) of the expandable body. When the inner cavity of the expandable body is filled with liquid fluid to cause the free part (242) of the expandable body to expand and deform to compress the functional tube (L), the liquid in the inner cavity (240) of the expandable body flows out through the small hole.

11. The working channel controllable medical endoscope according to any one of claims 1 to 10, characterized in that: The protrusion connection part (23) is in the shape of a sleeve and is rotatably connected to the endoscope catheter head (11). An indication arrow (234) is provided on the outer surface of the sleeve-shaped protrusion connection part (23), and a scale line (115) and / or text mark is provided in the endoscope catheter head (11) area below the indication arrow (234); or scale lines and text mark are provided on the outer surface of the protrusion connection part (23) and an indication arrow is provided in the endoscope catheter head (11) area.

Images