Water flow guiding type medical endoscope and guiding body

Abstract

A water flow guiding type medical endoscope and a guiding body are provided, an endoscope catheter head (11) is provided with a snooping assembly (112), an endoscope catheter (1) is provided with a working channel (10) penetrating through the head and the tail, the guiding body (2) is in a cap shape and is composed of a guiding body head (21), a guiding body middle portion (22) and a guiding body connecting portion (23), and the guiding body connecting portion (23) is connected with the guiding body head (21). The guide body connecting part (23) is connected with the endoscope catheter head top end (111) area; the inner space of the guiding body middle portion is a guiding body middle portion inner cavity (20), the guiding body head portion is provided with a guiding body head portion inner cavity (210) for containing a functional pipe wire (L) extending out of a working channel inner opening (101), and the functional pipe wire (L) firstly enters the guiding body head portion inner cavity (210) and then extends out of a guiding body head opening (2100) in the using process. Perfusate (D) sequentially flows out through the inner opening of the working channel, the inner cavity of the middle part of the guide body, the inner cavity of the head part of the guide body and the opening of the head part of the guide body.

Description

Technical Field

[0001] The utility model relates to a water flow-guided medical endoscope and a guide body, belonging to the technical field of medical equipment products. Background Art

[0002] When used, the existing medical endoscope enters the natural cavity or pathological sinus of the living body to perform operations such as biopsy, tissue ablation, electroresection, laser lithotripsy, etc. When performing operations such as laser lithotripsy that may generate local high temperature, the perfusion fluid flowing out of the endoscope working channel or other passages flows along the laser optical fiber to the area where the stone contacts the optical fiber to reduce the local high temperature. Since the perfusion fluid outlet is still several millimeters or tens of millimeters away from the high-temperature area, the perfusion fluid flow has no guidance, and only part of the water flow contacts the high-temperature area, the cooling effect is poor and a large amount of perfusion fluid is wasted; increasing the perfusion fluid perfusion pressure will have certain improvements, but high pressure will also cause lymph and / or venous reflux in the body, increasing the risk of infection; after the laser optical fiber extends from the top of the endoscope catheter head, the optical fiber is difficult to bend and cannot reach the lateral stones; when the stone is in a bad position, the filamentous stone basket of the prior art cannot be opened, and it is difficult to move the stone to a favorable position. Summary of the invention

[0003] The utility model provides a water flow guided medical endoscope and a guide body, which can visually and synchronously perform water flow guidance of the perfusion fluid, optical fiber bending guidance or negative pressure suction and stone displacement of the stones, significantly improving the cooling effect during laser lithotripsy, and achieving precise lithotripsy and efficient stone removal.

[0004] The purpose of the utility model is achieved in this way:

[0005] A water flow guided medical endoscope, wherein the head region of the endoscope catheter is provided with a spying 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 entering the body when in use and an outer opening of the working channel outside the body, and also includes a thin-walled guide body, the guide body is in a cap shape and is composed of a guide body head, a guide body middle portion, and a guide body connecting portion, the guide body middle portion and the guide body head extend in a direction away from the top end of the endoscope catheter head, and the guide body connecting portion is connected to the top end region of the endoscope catheter head; the internal space of the guide body middle portion is the guide body middle portion inner cavity, the guide body head has a guide body head inner cavity for accommodating a functional tube filament extending from the inner opening of the working channel, when in use, the functional tube filament first enters the guide body head inner cavity and then extends from the guide body head opening, and the perfusion fluid flows out sequentially through the inner opening of the working channel, the guide body middle portion inner cavity, the guide body head inner cavity, and the guide body head opening.

[0006] In order to facilitate the entry of functional tubes and wires such as laser optical fibers, a tapered transition is provided between the middle portion of the guide body and the guide body head, so as to assist the functional tubes and wires to enter the inner cavity of the guide body head.

[0007] In order not to affect the image quality, at least the middle part of the guide body and the head part of the guide body are transparent.

[0008] In order to protect the body's tissue mucosa, at least the guide head is easy to deform and is preferably made of flexible and elastic materials. After the functional tube wire is inserted into the inner cavity of the guide head, the inner surface of the guide head and the outer surface of the functional tube wire are in interference contact, tight fit, or with a gap.

[0009] In order to better cool and increase the area of ​​the negative pressure suction opening, a hood-like body or a cylindrical body is extended to the distal end of the guide body head; the hood-like body and the cylindrical body are smooth as a whole or have easily deformable stepped wrinkles; when in use, the rigid or easily deformable hood-like body covers the high-temperature center area of ​​the stone in the internal space of the hood-like body, ensuring that all or most of the irrigation fluid enters the internal space of the hood-like body; the opening of the cylindrical body is opposite to the high-temperature center area of ​​the stone, and the irrigation fluid is sprayed to the high-temperature center area of ​​the stone after being guided through the internal space of the cylindrical body; when the working channel of the endoscope catheter is connected to negative pressure, the hood-like body and the cylindrical body can be used to suck stones.

[0010] In order to connect well with the endoscope catheter, the guide body connecting part is connected to the endoscope catheter head in a sleeve shape, the inner surface of the guide body connecting part is provided with continuous or discontinuous ribs, and the area adjacent to the top of the endoscope catheter head is provided with continuous or discontinuous grooves. During assembly, the ribs are embedded in the corresponding grooves.

[0011] To further enhance the guiding effect, a sheet-shaped or block-shaped honeycomb body is connected to the head of the guide body, and a functional tube wire channel and multiple axial perfusion liquid channels and / or oblique perfusion liquid channels are provided on the honeycomb body; the top of the honeycomb body is directly facing the outside or a hood-shaped body or a cylindrical body is extended distally from the top of the honeycomb body; the honeycomb body can also prevent stone fragments from clogging the working channel of the endoscope catheter.

[0012] One functional structure is that the guide head is connected to a hollow flexible expansion body, the inner cavity of the expansion body is connected to the inner cavity of the guide head through a middle hole, and the top area of ​​the inner cavity of the expansion body is provided with multiple expansion body liquid outlet holes.

[0013] In order to complete the lithotripsy of stones located on the side of the top end of the endoscope catheter head, at least the inner cavity of the guide head is curved or a curved functional tube wire channel is provided on any one of the functional structures extending from the guide head, such as an expanded body, a hood-shaped body, and a cylindrical body, so that the passing functional tube wires are forced to bend in the same direction, so that the top end of the laser optical fiber is perpendicular or nearly perpendicular to the stone.

[0014] When the working channel of the endoscope catheter is centrally arranged, the guide body connecting part is in the shape of a sleeve and is rotatably connected to the endoscope catheter head, and the outer surface of the sleeve-shaped guide body connecting part has no indicator mark or is provided with an indicator mark; when the working channel of the endoscope catheter is eccentrically arranged, the middle part of the guide body and the guide body connecting part are independent components, and the middle part of the guide body is rotatably connected to the top end area of ​​the guide body connecting part through the connecting seat below, the outer surface of the connecting seat of the middle part of the guide body has no indicator mark or is provided with an indicator mark arrow, and the guide body connecting part area below the indicator arrow is provided with scale lines and / or text.

[0015] The guide body can be pre-combined with the endoscope catheter, or it can be used as an independent component or assembly. The thin-walled guide body is in a cap shape and is composed of a guide body head, a guide body middle part, and a guide body connecting part. The guide body middle part and the guide body head extend from the top end of the endoscope catheter head to the distal end, and the guide body connecting part is connected to the top end area of ​​the endoscope catheter head; the internal space of the guide body middle part is the guide body middle part inner cavity, and the guide body head has a guide body head inner cavity for accommodating a functional tube wire extending from an opening in the working channel. When in use, the functional tube wire first enters the guide body head inner cavity and then extends from the guide body head opening, and the perfusion liquid flows out sequentially through the opening in the working channel, the guide body middle part inner cavity, the guide body head inner cavity, and the guide body head opening; the guide body also includes one or more functional structures described above; the guide body connecting part and the endoscope catheter head are connected for easy disassembly.

[0016] The beneficial effects of the utility model are:

[0017] 1. During the operation, the perfusion fluid flow is guided under the premise of visualization to ensure that the perfusion fluid reaches the high-temperature area in the center of the stone.

[0018] 2. The perfusion liquid outlet structure with variable size increases the perfusion liquid injection rate.

[0019] 3. The functional structures of the guide head such as the hood-shaped body and the cylindrical body play a role in further guiding the water flow and increasing the irrigation area.

[0020] 4. When the working channel of the endoscope catheter is connected to negative pressure, the hood-shaped body and the cylinder-shaped body can be used to absorb larger stones, and the stones can be displaced and then crushed, or they can be directly removed from the body.

[0021] 5. When the working channel of the endoscope catheter is connected to negative pressure, the hood-shaped body and the cylindrical body are used in combination with the honeycomb body to avoid blockage of the working channel of the endoscope catheter during the process of adsorbing stones.

[0022] 6. The flexible expansion body connected to the head of the guide body avoids damaging the mucosa and provides a larger area for the perfusion fluid to act.

[0023] 7. The curved inner cavity of the guide head or the curved inner cavity of the expanded body makes the passing laser optical fiber bend in the same direction, which helps to vertically face stones with poor positioning of the top of the laser optical fiber. The synchronous guidance of the water flow ensures the cooling effect of the lithotripsy process.

[0024] 8. The transparent guide structure does not affect the acquisition of images during endoscopic surgery.

[0025] 9. The bending structure of the utility model cooperates with the rotatable design of the middle part of the guide body and the connecting part of the guide body to make the bending direction of the optical fiber adjustable, which better meets clinical needs.

[0026] 10. The guide body connection part and the endoscope catheter are easily disassembled, with lower manufacturing cost and more flexible use.

[0027] The utility model significantly optimizes the functional structure of the endoscope system, accurately guides the water flow of the perfusion fluid and enhances the perfusion efficiency, thereby minimizing and avoiding the risk of thermal damage to body tissues; combined with the bending regulation of the laser optical fiber, the lithotripsy operation is completed more thoroughly; the large-caliber negative pressure suction function replaces the traditional stone basket, so that stone fragments and various waste materials can be fully removed during the operation, eliminating the risk of residual stone fragments; greatly saving operation time, improving operation quality, and reducing treatment costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The accompanying drawings which do not limit the present invention are as follows:

[0029] Figure 1A : A three-dimensional schematic diagram of an endoscope catheter 1 of the prior art, in which a laser optical fiber L extends from an opening 101 in a working channel toward a stone S;

[0030] Figure 1B : Schematic diagram of laser lithotripsy cross section in the prior art, the arrow indicates the flow direction of the perfusion fluid D, and only part of the perfusion fluid D contacts the high-temperature central area T;

[0031] Figure 1C : A cross-sectional view of Example 1, in which the laser optical fiber L slightly extends from the inner cavity 210 of the guide head toward the stone S;

[0032] Figure 1D : A cross-sectional view of the application state of Example 1, wherein the arrow indicates the flow direction of the perfusion liquid D;

[0033] Figure 1E : A cross-sectional view of the flexible guide head 21 of Example 1, wherein the arrow indicates the flow direction of the perfusion liquid D;

[0034] Figure 2A : Schematic diagram of the cross-sectional structure of embodiment 2;

[0035] Figure 2B: A cross-sectional schematic diagram of the pressurized injection of the perfusion liquid D in Example 2;

[0036] Figure 2C : A cross-sectional schematic diagram of Example 2 after the pressurized injection of the perfusion liquid D is completed;

[0037] Figure 3A : A schematic cross-sectional view of a guide body connected to a cover-shaped body 211 of Example 3;

[0038] Figure 3B : A schematic cross-sectional view of a cover-shaped body 211 structure of Example 3;

[0039] Figure 3C : A schematic cross-sectional view of another cover-shaped body 211 structure of Embodiment 3, wherein the arrow indicates the direction of water flow;

[0040] Figure 4A : A schematic cross-sectional view of embodiment 4;

[0041] Figure 4B : A partial cutaway schematic diagram of Example 4;

[0042] Figure 5A : A partial cutaway schematic diagram of Example 5;

[0043] Figure 5B : A schematic cross-sectional structure diagram of another solution of the embodiment 5 series, in which the laser optical fiber L passes through the expanded body 213;

[0044] Figure 5C : A cross-sectional schematic diagram of the enlarged body 213 of Example 5 after being filled with the perfusion liquid D;

[0045] Figure 5D : A schematic cross-sectional view of the cover-shaped body 211 structure of the fifth embodiment;

[0046] Figure 5E : A partial cross-sectional schematic diagram of the cover-shaped body 211 of the embodiment 5 series for absorbing stone debris S1 and the like;

[0047] Fig. 6A : A partial cross-sectional schematic diagram of an enlarged body 213 with a curved optical fiber channel 2133 of Example 6;

[0048] Figure 6B : A cross-sectional schematic diagram of the laser optical fiber L of Example 6 passing through the curved optical fiber channel 2133 of the enlarged body 213 and being passively bent in the same direction;

[0049] Figure 6C : A cross-sectional schematic diagram of the expansion deformation after the inner cavity 2130 of the expandable body of Example 6 is filled with the perfusion fluid D;

[0050] Fig.6D: A three-dimensional schematic diagram of adjusting the bending direction of the laser optical fiber by rotating the guide body connecting portion 23 in the embodiment 6 series;

[0051] Fig. 6E : A three-dimensional schematic diagram of adjusting the bending direction of the laser optical fiber by rotating the middle portion 22 of the guide body in the sixth embodiment;

[0052] Fig. 6F : A cross-sectional schematic diagram of adjusting the bending direction of the laser optical fiber by rotating the middle portion 22 of the guide body in the sixth embodiment;

[0053] Figure 6G : A schematic cross-sectional view of another structure in the Example 6 series that forces the laser optical fiber L to bend passively by means of a bent guide head 21. DETAILED DESCRIPTION

[0054] The embodiments of the present invention are not limited to the following:

[0055] Embodiment 1:

[0056] like Figure 1AAs shown, in the medical endoscope of the prior art, the endoscope catheter 1 is 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 an optical fiber side branch 142 connected to the working channel 10 is also provided at the end of the handle 14. Functional tube wires L such as laser optical fibers pass through the sealing cap C and enter the working channel 10 via the optical fiber side branch 142. The handle 14 is also provided with a control mechanism for adjusting the bending degree of the endoscope catheter head 11 and / or a control rod 141 in the bending direction, the control rod 141 controls the bending member such as the snake bone of the endoscope catheter head 11 through the pulling wire or the like (the figure is omitted); when crushing stones, the laser optical fiber L extends at least several millimeters from the opening 101 in the working channel of the endoscope catheter, and the top L1 of the laser optical fiber contacts or is adjacent to the stone S, continuously releasing energy to cause the stone S to begin to break. When the perfusion fluid D is injected from the working channel 10, due to the presence of the functional tube wire L such as the optical fiber L, the outflow of the perfusion fluid from the opening 101 in the working channel is blocked, and the flow rate decreases. Experiments show that when the inner diameter of the working channel 10 is 1.2 mm, the perfusion pressure of 60 cm of water column can make the water flow out of the opening 101 in the working channel in the shape of a column, and when the laser optical fiber L with an outer diameter of 0.4 mm is inserted into the working channel 10, the water flow overflows from the opening 101 in the working channel in the shape of a water drop, resulting in poor water flow at the contact point or the vicinity of the laser optical fiber top L1 and the stone S. Even if pressurized perfusion is performed, such as Figure 1B As shown, only a part of the water flow out of the opening 101 in the working channel (indicated by the axial upward arrow) flows to the high-temperature central area T of the stone. A lot of water will also flow laterally in a path of several millimeters. The lateral water flow (indicated by the left and right arc arrows) cannot directly cool down the high-temperature central area T of the stone. This physical diversion phenomenon significantly reduces the cooling effect of the perfusion fluid D.

[0057] like Figure 1C , Figure 1DThe water flow guided medical endoscope of the utility model also includes a thin-walled guide body 2, which is in the shape of a cap and is composed of a guide body head 21, a guide body middle part 22, and a guide body connecting part 23. The guide body middle part 22 and the guide body head 21 extend from the endoscope catheter head top 111 to the distal end, and the guide body connecting part 23 is connected to the endoscope catheter head top 111 area; the internal space of the guide body middle part 22 is the guide body middle part inner cavity 20, and the guide body head 21 has a guide body for accommodating the functional tube wire L extending from the opening 101 in the working channel The inner cavity 210 of the head, when crushing stones, the laser optical fiber L first enters the inner cavity 210 of the guide body head and then extends from the opening 2100 of the guide body head, and the perfusion fluid D flows out in sequence through the opening 101 in the working channel, the inner cavity 20 of the middle part of the guide body, the inner cavity 210 of the guide body head, and the opening 2100 of the guide body head; different from the traditional lithotripsy without water flow guidance, the perfusion fluid D is guided by the guide body 2 to approach the high-temperature center area T of the opposite stone, and the perfusion fluid D flowing out from the opening 2100 of the guide body head can be fully used for local cooling without the flow loss of the perfusion fluid D diversion.

[0058] There is a tapered transition between the middle portion 22 of the guide body and the guide head 21, so that the laser optical fiber L or other auxiliary functional tubes and wires can easily enter the inner cavity 210 of the guide head. At least the middle portion 22 of the guide body and the guide head 21 are transparent, which is convenient for observing the peeping component 112.

[0059] The guide head 21 can be made of a rigid material that is not easily deformed, such as transparent medical resin polycarbonate, polystyrene, etc. After the laser optical fiber L is placed in the inner cavity 210 of the guide head, a gap should be left to facilitate the outflow of the perfusion liquid D, such as Figure 1D .

[0060] like Figure 1E A more favorable solution is that at least the guide head 21 is easy to deform, such as being made of low-hardness silicone rubber, latex, thermoplastic elastomer, etc. After the laser optical fiber L is placed in the inner cavity 210 of the guide head, the inner surface of the guide head 21 and the outer surface of the laser optical fiber L are in interference contact or close fit, or a very small gap may be left. After the perfusion fluid D is pressurized and perfused, the guide head 21 is pressurized and expanded, and the volume of the guide head inner cavity 210 increases. The perfusion fluid D in the guide head inner cavity 210 is also compressed by the elastic retraction force of the guide head 21. The perfusion fluid D after double pressurization is ejected at high speed through the pressure-expanded guide head opening 2100, which can quickly and accurately cool the high-temperature central area T of the stone, thereby effectively avoiding high-temperature damage.

[0061] Embodiment 2:

[0062] like Figures 2A-2CAs shown, at least the guide head 21 is easy to deform, the laser optical fiber L is placed in the inner cavity 210 of the guide head and partially protrudes, the inner surface of the guide head 21 and the outer surface of the functional tube filament L are in interference contact or close fit, when the perfusion liquid D is pressurized into the guide body 2, the high-pressure perfusion liquid D opens the originally closed guide head opening 2100, and the perfusion liquid D is ejected at high speed toward the high-temperature central area T of the stone (such as Figure 2B ), when the pressure of the perfusion liquid D decreases, the opening 2100 of the guide head returns to the state as Figure 2C In the closed state, the opening 2100 at the head of the guide body can change alternately in an irregular "open-closed-open-closed" water flow swinging manner, thereby increasing the flow rate and enlarging the action area of ​​the perfusion liquid D.

[0063] Embodiment 3:

[0064] like Figures 3A-3C The guide head 21 extends a cover-shaped body 211 toward the distal end, such as Figure 3A The main body of the hood-like body 211 is continuous and smooth, and the outer opening 2113 of the hood-like body is open to the distal end. When in use, the rigid or easily deformable hood-like body 211 covers the high-temperature central area T of the stone in the internal space 2110 of the hood-like body, ensuring that all or most of the perfusion fluid D enters the internal space 2110 of the hood-like body, and then flows to the high-temperature central area T of the stone through the outer opening 2113 of the hood-like body.

[0065] When negative pressure is connected to the working channel 10 of the endoscope catheter, the wide hood-like outer opening 2113 that is at least partially flexible can be used to absorb the stone S. A larger stone S can be absorbed on the hood-like outer opening 2113 and moved to a favorable position for laser lithotripsy, such as moving from the lower renal calyx to the upper renal calyx for lithotripsy.

[0066] like Figure 3B The cover-like body 211 is provided with an external opening, and the external opening of the cover-like body 211 refers to a plurality of notches 2111 and / or liquid outlet holes 2112 provided on the edge of the cover-like body 211; when in use, the cover-like body 211, which is easy to deform, covers the high-temperature central area T of the stone in the internal space 2110 of the cover-like body, ensuring that all or most of the perfusion liquid D enters the internal space 2110 of the cover-like body and then flows out from the edge notches 2111 and / or the liquid outlet holes 2112, thereby avoiding the phenomenon of poor water flow caused by the stone S seriously blocking the external opening 2113 of the cover-like body.

[0067] Further ideas such as Figure 3CThe main part of the cover-like body 211 is arranged to be a stepped fold shape that is easy to deform. After the stepped folded cover-like body 211 is deformed, it is easier to cover the high-temperature central area T of the stone in the internal space 2110 of the cover-like body, ensuring that all or most of the perfusion liquid D enters the internal space 2110 of the cover-like body. The easily deformable stepped folded cover-like outer opening 2113 is not easily seriously blocked by the stone S. The stepped folded cover-like body 211 may also be provided with an edge notch 2111 and / or a liquid outlet 2112 (figure omitted).

[0068] Embodiment 4:

[0069] like Figure 4A , Figure 4B The guide body head 21 extends a cylindrical body 212 to the distal end, and the cylindrical body 212 is smooth as a whole or has a stepped wrinkle shape that is easy to deform (figure omitted). When in use, the rigid or easily deformable cylindrical outer opening 2121 faces the high-temperature central area T of the stone, and the irrigation liquid D (figure omitted) is guided through the internal space 2120 of the cylindrical body and sprayed to the high-temperature central area T of the stone; the guide body connecting part 23 is in a sleeve shape and connected to the endoscope catheter head 11, and the inner surface of the guide body connecting part 23 is provided with continuous or discontinuous ribs 231, and the area adjacent to the top 111 of the endoscope catheter head 11 is provided with continuous or discontinuous grooves 113, and the ribs 231 are embedded in the corresponding grooves 113 during assembly; it is also possible that the inner surface of the guide body connecting part is provided with grooves, and the corresponding area of ​​the endoscope catheter head 11 is provided with ribs to cooperate with each other.

[0070] Embodiment 5:

[0071] Another series of schemes of the utility model are shown, such as Figure 5A , which is different from the above-mentioned embodiment, a block-shaped or sheet-shaped (figure omitted) honeycomb body 214 is connected to the guide head 21, and a functional tube wire channel 2140 and a plurality of axial perfusion liquid channels 2141 and / or oblique perfusion liquid channels 2142 are provided on the honeycomb body 214; the top of the honeycomb body 214 is directly facing outward, and when in use, the top of the honeycomb body 214 is directly facing the high-temperature central area T of the stone. When in use, the laser optical fiber L passes through the channel 2140, and the perfusion liquid D (figure omitted) is accurately guided through the axial perfusion liquid channel 2141 and / or the oblique perfusion liquid channel 2142, and the spraying area is uniform; and when negative pressure is connected to the working channel 10 of the endoscope catheter, the top of the honeycomb body 214 can be used to absorb the stone S, and the powdered stone debris can enter the working channel 10 through the axial perfusion liquid channel 2141 and / or the oblique perfusion liquid channel 2142 and be removed out of the body, and the larger stone S can be absorbed at the top of the honeycomb body 214, and then moved to a favorable position for laser lithotripsy.

[0072] Another guide body head 21 structure is as follows Figure 5BThe guide body head 21 extends to the distal end and is connected to a hollow flexible expansion body 213, the expansion body cavity 2130 is connected to the guide body head cavity 210 through the middle hole 2132, and the expansion body cavity 2130 is provided with a plurality of expansion body liquid outlet holes 2131 at the top area; Figure 5C When the perfusion fluid D is injected into the inner cavity 2130 of the expander body at a relatively high pressure of tens or hundreds of millimeters of mercury, the expander body 213 expands and deforms, and the elastic recoil force further increases the pressure of the perfusion fluid D in the inner cavity 2130 of the expander body. The high-pressure perfusion fluid D is ejected at a high speed from the multiple expander body outlet holes 2131 located in the top area of ​​the expander body 213, facing the high-temperature central area T of the stone. After the expander body 213 expands, the effective area of ​​the expander body outlet holes 2131 is synchronously increased, and the cooling area is also increased.

[0073] Figure 5D Another structure is shown, in which a hood-shaped body 211 or a cylindrical body 212 (not shown) is extended from the top of the honeycomb body 214 to the distal end. When negative pressure is applied, the hood-shaped outer opening 2113, which is wider than the inner opening 101 of the endoscope working channel, can absorb large-sized stones S, and move the stones S to a favorable position before laser lithotripsy. The absorbed stones S can also be directly brought out of the body with the endoscope catheter 1. The axial perfusion liquid channel 2141 and the oblique perfusion liquid channel 2142 of the honeycomb body 214 are smaller than the inner opening 101 of the endoscope working channel, thereby blocking stones S that may block the inner opening 101 of the endoscope working channel, and allowing powdered stone debris S2 (such as Figure 5E ) enters the working channel 10 and is cleared out of the body; Figure 5E The larger stone fragments S1 can be retained in the inner space 2110 of the hood due to negative pressure adsorption and brought out of the body along with the endoscopic catheter 1, replacing the traditional stone basket with a metal wire structure.

[0074] Embodiment 6:

[0075] When crushing stones, the best position of the top L1 of the laser fiber is to be able to face the stone S vertically; when the top L1 of the laser fiber cannot face the stone S vertically, at least the area of ​​the guide head 21 is bent to one side, such as Fig. 6A As shown, the expanded body 213 has a curved optical fiber channel 2133, and the curved optical fiber channel 2133 forces the laser optical fiber L passing through the optical fiber channel 2133 to bend in the same direction (such as Figure 6B ) to meet the clinical requirement of making the top L1 of the laser optical fiber face the stone S. The optical fiber channel 2133 and the transition area with the guide body head 21 can be made of relatively hard materials, while the other parts of the expanded body 213 can be made of flexible materials. When the perfusion liquid D enters the expanded body cavity 2130, the expanded body 213 can be expanded and deformed. After the expanded body 213 expands, the effective area of ​​the expanded body liquid outlet 2131 is synchronously increased, and the cooling area is also increased (such as Figure 6C); the guide body head 21 area is bent to one side, including the guide body head 21 itself being bent to one side, that is, the passing laser optical fiber L is forced to bend in the same direction through the curved guide body head inner cavity 210 (figure omitted), or a curved optical fiber channel is set on the functional structure extending from the guide body head 21, such as the expansion body 213, the cover body 211, and the cylindrical body 212.

[0076] Fig.6D As shown, in order to better adjust the bending direction of the laser optical fiber L, when the endoscope catheter working channel 10 is centrally set, the guide body connecting part 23 is in a sleeve-like shape and is rotatably connected to the endoscope catheter head 11. The guide body connecting part 23 rotates around the central axis A0 of the endoscope catheter, and an indicator mark is provided on the outer surface of the sleeve-like guide body connecting part 23. Specifically, an indicator arrow 234 with the same bending direction may be preferentially provided on the outer surface of the sleeve-like guide body connecting part 23, and a scale line 115 and text are provided in the endoscope catheter head 11 area below the indicator arrow 234, and the scale opposite to the indicator arrow 234 is the bending direction of the optical fiber L.

[0077] like Fig. 6E , Fig. 6F When the working channel 10 of the endoscope catheter is eccentrically set, the middle part 22 of the guide body and the connecting part 23 of the guide body are independent components, and the connecting seat 221 below the middle part 22 of the guide body and the top area 235 of the connecting part 23 of the guide body are rotatably connected, that is, the middle part 22 of the guide body and the guide head 21 rotate around the central axis A1 of the working channel of the endoscope catheter, and the outer surface of the connecting seat 221 of the middle part 22 of the guide body is provided with an indicator arrow 234, and the area of ​​the connecting part 23 of the guide body below the indicator arrow 234 is provided with a scale line 115 and text, and the scale opposite to the indicator arrow 234 is the bending direction of the optical fiber L.

[0078] Figure 6G A curved structure without an expansion body is shown, in which the middle portion 22 of the guide body is rotatably connected to the guide body head 21, and the laser optical fiber L is bent in the same direction as the inner cavity 210 of the curved guide body head. The perfusion liquid (figure omitted) flows out or is ejected through the gap between the laser optical fiber L and the opening 2100 of the guide body head. The arrow indicates that the direction of the water flow is in the same direction as the bending of the laser optical fiber. The synchronous guidance of the water flow ensures the cooling effect of the lithotripsy process. Under the same concept, the expansion body of the aforementioned embodiment can be directly mounted on the outside of the curved guide body head 21, and the gap between the laser optical fiber L and the opening 2100 of the guide body head is reduced or matched without a gap, while the inner cavity 220 of the middle portion of the guide body is connected to the inner cavity 2130 of the expansion body (figure omitted).

[0079] The guide body of the utility model can be an independent component or assembly, which is then connected to the endoscope catheter head 11 when used, or it can be pre-combined with the endoscope catheter head 11. The utility model covers medical hard endoscopes and soft 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.; the endoscope catheter head described in the utility model refers to the part or bendable part that protrudes out of the opening in the sheath during operation, and many types of endoscope catheters 1 can be provided with a component that actively or passively bends the endoscope catheter head 11 (not shown).

[0080] When the perfusion fluid flow is difficult to flush away waste matter adhering to the mucosal surface, the guide body 2 of the utility model and the expansion body connected to the guide body head 21 can be provided with brush-like protrusions in various directions (not shown) to help brush away the waste matter from the mucosa under the drive of the endoscopic catheter.

[0081] 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 enters the body when in use; the tail portion is toward the proximal end portion, and is usually at least partially 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.

[0082] The medical endoscope of the utility model significantly simplifies the operation steps, reduces the thermal damage to tissues in various thermal ablation operations, greatly saves operation time and reduces treatment costs; it 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 such as the chest cavity and abdominal cavity of a living body; it can also be used for medical operations on penetrating wounds, pathological sinus tracts, etc.; it can be specifically made into gastroscopes, duodenoscopes, bronchoscopes, nasopharyngeal endoscopes, ureteroscopes, cystoscopes, hysteroscopes, colposcopes, arthroscopes, etc.

Claims

1. A water flow guided medical endoscope, wherein a head (11) region of an endoscope catheter (1) is provided with a peep assembly (112), the endoscope catheter (1) is provided with a working channel (10) running through the head and tail, the working channel (10) being provided with an inner working channel opening (101) for entering the body during use and an outer working channel opening (102) for an outer portion of the body, characterized in that: The invention also comprises a thin-walled guide body (2), the guide body (2) being in the shape of a cap and being composed of a guide body head (21), a guide body middle part (22), and a guide body connecting part (23), the guide body middle part (22) and the guide body head (21) extending in a direction away from the top end (111) of the endoscope catheter head, and the guide body connecting part (23) being connected to the top end (111) of the endoscope catheter head; the internal space of the guide body middle part (22) is a guide body middle part inner cavity (20), and the guide body head (21) has a guide body head inner cavity (210) for accommodating a functional tube thread (L) extending from an opening (101) in a working channel; when in use, the functional tube thread (L) first enters the guide body head inner cavity (210) and then extends from the guide body head opening (2100), and the perfusion liquid (D) flows out in sequence through the working channel opening (101), the guide body middle part inner cavity (20), the guide body head inner cavity (210), and the guide body head opening (2100).

2. The water flow guided medical endoscope according to claim 1, characterized in that: There is a conical transition between the middle portion (22) of the guide body and the head portion (21) of the guide body, so that the functional tube thread (L) can easily enter the inner cavity (210) of the head portion of the guide body; and / or at least the middle portion (22) of the guide body and the head portion (21) of the guide body are transparent.

3. The water flow guided medical endoscope according to claim 1, characterized in that: At least the guide body head (21) is easy to deform, and after the functional tube wire (L) is placed in the inner cavity (210) of the guide body head, the inner surface of the guide body head (21) and the outer surface of the functional tube wire (L) are in any one of interference contact, tight fit, or a gap.

4. The water flow guided medical endoscope according to claim 1, characterized in that: The guide body head (21) extends a hood-shaped body (211) or a cylindrical body (212) toward the distal end; the hood-shaped body (211) or the cylindrical body (212) is smooth as a whole or has a stepped fold shape that is easy to deform; when in use, the rigid or easily deformable hood-shaped body (211) or the cylindrical body (212) covers the high-temperature central area (T) of the stone within the internal space (2110) of the hood-shaped body or the internal space (2120) of the cylindrical body, thereby ensuring that all or most of the perfusion fluid (D) reaches the high-temperature central area (T) of the stone after being guided.

5. The water flow guided medical endoscope according to claim 1, characterized in that: The guide body connection portion (23) is connected to the endoscope catheter head (11) in a sleeve shape, and the inner surface of the guide body connection portion (23) is provided with continuous or discontinuous ribs (231). The endoscope catheter head (11) is provided with a continuous or discontinuous groove (113) in an area adjacent to the top end (111) of the head, and the ribs (231) are embedded in the corresponding grooves (113) during assembly.

6. The water flow guided medical endoscope according to claim 1, characterized in that: The guide body head (21) is connected to a sheet-shaped or block-shaped honeycomb body (214); the honeycomb body (214) is provided with a functional tube wire channel (2140) and a plurality of axial perfusion liquid channels (2141) and / or oblique perfusion liquid channels (2142); the top of the honeycomb body (214) is directly facing outward or the top of the honeycomb body (214) extends a hood-shaped body (211) or a cylindrical body (212) toward the far end.

7. The water flow guided medical endoscope according to claim 1, characterized in that: The guide body head (21) is connected to a hollow flexible expansion body (213); the expansion body inner cavity (2130) is connected to the guide body head inner cavity (210) via a middle hole (2132); and a plurality of expansion body liquid outlet holes (2131) are provided in the top region of the expansion body inner cavity (2130).

8. The water flow guided medical endoscope according to any one of claims 1 to 7, characterized in that: At least the inner cavity (210) of the guide head is curved or a curved functional tube wire channel is provided on any one of the functional structures extending from the guide head (21), such as the expanded body (213), the hood-shaped body (211), and the cylindrical body (212), so as to force the functional tube wire (L) passing through to bend in the same direction.

9. The water flow guided medical endoscope according to claim 8, characterized in that: When the endoscope catheter working channel (10) is centrally arranged, the guide body connecting portion (23) is sleeve-shaped and rotatably connected to the endoscope catheter head (11), and the outer surface of the sleeve-shaped guide body connecting portion (23) has no indication mark or is provided with an indication mark; when the endoscope catheter working channel (10) is eccentrically arranged, the guide body middle portion (22) and the guide body connecting portion (23) are independent components, and the connecting seat (221) below the guide body middle portion (22) is rotatably connected to the top end region (235) of the guide body connecting portion (23), and the outer surface of the connecting seat (221) of the guide body middle portion (22) has no indication mark or is provided with an indication mark.

10. A guide body, used after being connected to an endoscope catheter (1), characterized in that: The thin-walled guide body (2) is in the shape of a cap and is composed of a guide body head (21), a guide body middle part (22), and a guide body connecting part (23). The guide body middle part (22) and the guide body head (21) extend in a direction away from the top end (111) of the endoscope catheter head, and the guide body connecting part (23) is connected to the top end (111) of the endoscope catheter head. The internal space of the guide body middle part (22) is the guide body middle part inner cavity (20), and the guide body head (21) has a guide for accommodating a functional tube wire (L) extending from an opening (101) in a working channel. The guide body comprises an inner cavity (210) of the guide body head. When in use, the functional tube (L) first enters the inner cavity (210) of the guide body head and then extends from the opening (2100) of the guide body head. The perfusion liquid (D) flows out in sequence through the inner opening (101) of the working channel, the inner cavity (20) of the middle part of the guide body, the inner cavity (210) of the guide body head, and the opening (2100) of the guide body head. The guide body can also be used in conjunction with a water flow-guided medical endoscope described in any one of claims 1 to 9. The guide body connecting portion (23) and the endoscope catheter head (11) are connected in a way that is easy to disassemble and install.

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