Washing and sucking integrated medical endoscope

Abstract

A covering body (2) and a flushing and sucking integrated medical endoscope, the covering body (2) is composed of a covering body head (21), a covering body expandable portion (22) and a covering body sleeving portion (23), the covering body (2) sleeves at least a partial area of the head (11) of an endoscope catheter (1), and after the covering body (2) is sleeved, an inner opening (101) of a working channel of the endoscope catheter (1) and a snooping assembly (112) can still play corresponding roles. A dynamic interlayer (200) is formed between the outer surface of the endoscope catheter (1) and the expandable portion (22) of the covering body, during use, flushing fluid (D) enters the dynamic interlayer (200) and then flows out through a fluid outlet (201) of the dynamic interlayer, and the flushing fluid (D) after in-vivo tissue flushing and flushed waste materials (P) are sucked into the working channel (10) through an inner opening (101) of the working channel of the endoscope catheter. And then the air is discharged out of the body through the working channel outer opening (102).

Description

TECHNICAL FIELD

[0001] The present application relates to a flush-suction integrated medical endoscope, belonging to the technical field of medical devices. BACKGROUND

[0002] The existing medical endoscope is used to enter the natural cavity or pathological sinus of a living body, and perform operations such as biopsy, tissue ablation, electrocision, and laser lithotripsy. There are a large number of waste substances such as secretions, blood clots, and stone debris in the local area. Some waste substances adhere to the surface of the tissue and are difficult to clean. Some waste substances are located in the nasal sinus, appendix, kidney calyx, and the like. The cleaning of waste substances usually requires the use of a flushing liquid and a negative pressure suction. The operation is usually intermittent. The liquid outlet of the endoscope head is difficult to reach the blind end of the cavity. The liquid outlet into the body is usually fixed with the position of the endoscope catheter head. Many flushing operations are performed under non-visual conditions, which has the defects of poor flushing flexibility and small flushing area. SUMMARY

[0003] The present application provides a flush-suction integrated medical endoscope, which can visually synchronize flushing and suction, and is helpful to completely clean the waste substances in the endoscope operation process.

[0004] The purpose of the present application is achieved by a flush-suction integrated medical endoscope. The endoscope catheter head region is provided with a peeping assembly. The endoscope catheter is provided with a working channel penetrating the head and tail. The working channel is provided with a working channel inner opening entering the body during use and a working channel outer opening outside the body. The top end of the endoscope catheter head can be stretched out of the sheath inner opening of the sheath tube used with the endoscope catheter. The present application further comprises a hollow sheath. The sheath is composed of a sheath head, a sheath inflatable part, and a sheath sleeve part. The sheath is sleeved on the outside of the endoscope catheter and wraps at least part of the region of the endoscope catheter. The gap between the outer surface of the endoscope catheter and the sheath inflatable part is a dynamic interlayer. The gap between the sheath tube and the outer surface of the endoscope catheter is a static interlayer. During use, the external liquid entering the static interlayer first enters the dynamic interlayer through the dynamic interlayer liquid inlet directly formed or participated by the sheath sleeve part, and then flows out through the dynamic interlayer liquid outlet. The flushing liquid and waste substances after flushing the body tissue are sucked into the working channel through the endoscope catheter working channel inner opening, and then discharged to the outside of the body through the working channel outer opening.

[0005] In order to ensure the smooth flow of the flushing liquid, the total area of the dynamic interlayer liquid inlet is greater than the total area of the dynamic interlayer liquid outlet before the deformation and expansion of the sheath inflatable part.

[0006] In order to better fill and expand, the outer surface and / or inner surface of the sheath inflatable part is provided with a hydrophilic coating with lubricating effect.

[0007] Further, the endoscope catheter is provided with a connection structure with the covering body, including one or more of the following: intermittent or continuous grooves on the outer surface of the middle part of the endoscope catheter, annular or local recesses on the head of the endoscope catheter, external threads on the head of the endoscope catheter, a slightly reduced assembly section on the outer diameter of the head of the endoscope catheter, intermittent or continuous barrier platforms annularly distributed below the head of the endoscope catheter.

[0008] The head of the covering body and the inflatable part of the covering body are integrally formed as one component; or the head of the covering body and the inflatable part of the covering body are independently formed as two components, which are then tightly connected as one.

[0009] The sleeve joint part of the covering body is provided with one or more of the following structures: annular inward protruding ribs, thin-walled parts for connecting with the inflatable part of the covering body, notches for becoming dynamic sandwich liquid inlets after being attached to the endoscope catheter, through holes for directly becoming dynamic sandwich liquid inlets without being attached to the endoscope catheter.

[0010] The sheath tail is provided with a ring-shaped elastic sealing body, which is in interference contact with the outer surface of the endoscope catheter in relative motion, so as to seal the static sandwich layer from external liquid; or the inner surface of the sheath tail in a local area is tightly attached to the outer surface of the endoscope catheter, so that the endoscope catheter and the sheath can move relative to each other while sealing the external liquid.

[0011] The inflatable part of the covering body has one or more of the following structures and forms: uneven wall thickness, phased differences in wall thickness, intermittent or continuous thread line distribution of inward protruding and / or outward protruding protruding ribs, corrugated undulations.

[0012] It also includes a protruding suction body and / or a protruding blocking body arranged at the top end area of the head of the endoscope catheter or the head of the covering body, which is straight or curved.

[0013] In order to increase the cleaning effect of the waste adhering to the surface of the tissue, the head of the covering body and / or the inflatable part of the covering body is provided with one or more structures of brush-like protruding bodies, convex points, particles and spines.

[0014] The dynamic sandwich liquid outlet is arranged at the inflatable part of the covering body and / or the head of the covering body; the head of the covering body is directly provided with a dynamic sandwich liquid outlet and / or a dynamic sandwich liquid outlet is formed by the annular head part of the covering body being attached to the outer surface of the head of the endoscope catheter.

[0015] The head of the covering body is provided with a tubular embedding section which can be embedded into the opening of the working channel of the endoscope catheter, and the tubular embedding section is used for fixing the head of the covering body.

[0016] Further, the sheath head is provided with a tubular embedding segment which can be embedded into the opening of the working channel of the endoscope catheter, and the distal end of the tubular embedding segment is further provided with a hollow root segment, and after assembly, a gap is formed at the top end of the head of the endoscope catheter.

[0017] The sheath can be used as an independent product, and the sheath is composed of a sheath head, a sheath inflatable part and a sheath joint part. The sheath is jointed to at least part of the area of the head of the endoscope catheter. After the sheath is jointed, the working channel opening and the exploring assembly of the endoscope catheter can still play corresponding roles. A dynamic interlayer is formed between the outer surface of the endoscope catheter and the sheath inflatable part. During use, the flushing liquid first enters the dynamic interlayer and then flows out through the liquid outlet of the dynamic interlayer. After flushing the tissues in the body, the flushing liquid and the waste materials flushed away are sucked into the working channel through the working channel opening of the endoscope catheter, and then are discharged to the outside of the body through the outer opening of the working channel.

[0018] The sheath can be used as an independent product, and the sheath is composed of a sheath head, a sheath inflatable part and a sheath joint part. The sheath is jointed to at least part of the area of the head of the endoscope catheter. After the sheath is jointed, the working channel opening and the exploring assembly of the endoscope catheter can still play corresponding roles. A dynamic interlayer is formed between the outer surface of the endoscope catheter and the sheath inflatable part. During use, the flushing liquid first enters the dynamic interlayer and then flows out through the liquid outlet of the dynamic interlayer. After flushing the tissues in the body, the flushing liquid and the waste materials flushed away are sucked into the working channel through the working channel opening of the endoscope catheter, and then are discharged to the outside of the body through the outer opening of the working channel.

[0019] The sheath head is slidably jointed to the outside of the endoscope catheter. When the endoscope catheter is static, the sheath head can be axially displaced under the driving of the flushing liquid.

[0020] The sheath joint part and / or the sheath head and the endoscope catheter are connected in a detachable manner.

[0021] The beneficial effects of the present application are as follows:

[0022] 1. Precise flushing and negative pressure suction can be performed under the premise of intraoperative visualization, and the effect is significantly better than blind flushing.

[0023] 2. The sheath which expands in a wave or peristaltic manner can radially press the mucosa of natural cavities or other tissues in the body in real time, has a deep massage effect, can promote lymphatic and venous return, and improves local blood supply.

[0024] 3. When the water flow is difficult to wash off the waste adhering to the mucosa surface, the axial brush-like protrusions on the sheath and the radial brush-like protrusions are used to brush off the waste from the mucosa under the driving of the endoscope catheter.

[0025] 4. The thin-walled sheath made of elastic material can rapidly fill and expand while the wall thickness decreases. Even if each dynamic interlayer outlet has flushing liquid sprayed, the flushing liquid entering the dynamic interlayer is greater than the amount of liquid sprayed, and the sheath inflatable part will significantly fill and expand, while the volume of the dynamic interlayer increases, causing the flow channel to widen, and the flushing liquid flow to significantly increase.

[0026] 5. After expansion, due to the existence of elastic restoring force of the sheath inflatable part and the uneven flow of flushing liquid in the dynamic interlayer, the expansion state of the filled sheath inflatable part continuously changes under a certain pressure, showing a fluctuating or peristaltic shape, which drives the dynamic interlayer outlet to continuously change the liquid outlet direction within a certain range, increases the flushing area directly touched by the flushing liquid, and improves the flushing effect.

[0027] 6. The distal end of the forward deformed sheath inflatable part drives the dynamic interlayer outlet to synchronously protrude forward, achieving the effect of close-to-dynamic flushing that is difficult to achieve in the prior art.

[0028] 7. The elastic restoring force of the expanded sheath inflatable part further improves the flushing pressure in the dynamic interlayer, increases the flushing liquid flow rate of the dynamic interlayer outlet, and further improves the flushing effect.

[0029] 8. The flushing liquid flows out through the axial outlet, the inclined outlet, and the radial outlet, increases the flushing area, eliminates flushing dead angles, and can fully flush the waste in the natural cavities such as the external auditory canal, the nasal cavity, the vagina, and other surgical areas.

[0030] 9. A hydrophilic coating is added to at least the outer surface of the sheath head and / or the sheath inflatable part, which significantly improves the lubrication performance of the sheath part covering the endoscope catheter, reduces the contact resistance, further reduces the mechanical damage to the mucosa and other tissues in the body during the operation, and is more beneficial to the deformation and expansion of the sheath inflatable part during the fluctuation or peristalsis.

[0031] 10. Higher pressure flushing liquid enters the dynamic interlayer, and when the sheath inflatable part fills and expands, it can drive the dynamic interlayer outlet to protrude forward, causing the flushing area to continuously change while the radial brush-like protrusions continuously move, increasing the brushing area, and achieving a dynamic brushing effect without moving the endoscope catheter.

[0032] 11. The inflatable part of the covering body can block the natural cavity openings such as the external auditory canal opening and the anus opening after inflation, so as to avoid the direct flow of the flushing liquid and harmful waste from the gap between the covering body and the natural cavity openings, eliminate or reduce the risk of pollution and damage to the local skin caused by the flow of waste to the outside of the natural cavity, and reduce the burden of treatment and care.

[0033] 12. The flexible tubular covering body head protruding suction body can make the waste enter the inner cavity of the protruding suction body through the protruding suction body inlet, and then enter the working channel, so as to realize the effect of flexible close-to-precision suction. The protruding suction body can also be set in a curved shape with different angles according to different application scenarios, so as to better eliminate the possible in-vivo suction dead angle.

[0034] 13. The protruding blocking body can prevent the flushed waste from flowing upwards along the natural cavity and remaining in the body, such as preventing fecal debris in the anal canal cavity from being flushed into the rectal ampulla, and preventing inflammatory substances in the vagina from being flushed into the uterus through the cervical opening.

[0035] 14. In combination with the negative pressure suction in the working channel, the "flushing and suction integration" and "flushing, brushing and suction integration" functions of the endoscope system are coupled, the ideal function of dynamic integration is realized, and the treatment efficiency of the endoscope system is improved.

[0036] 15. The covering body covering the endoscope catheter can be used as disposable consumables, and the endoscope catheter can be reused after sterilization, which greatly saves the comprehensive cost.

[0037] 16. The design of the gap at the top end of the endoscope catheter head allows the flushing liquid to enter the gap and then be ejected, ensuring the stability of the flushing water flow.

[0038] 17. The gap structure at the top end of the endoscope catheter head allows the flexible covering body head to deform towards the gap when it hits the mucosa or other biological tissues in the body, thereby providing a buffer protection and ensuring the safety of the operation.

[0039] 18. The hollow brush-shaped protruding body cavity can pass through the flushing liquid, and the brushing and flushing are highly integrated during use, which is more conducive to cleaning the waste, especially the waste in the mucosal folds.

[0040] 19. By adjusting the pressure of the flushing liquid to drive the covering body head to reciprocate axially in the head region of the endoscope catheter, the flushing and brushing actions can be applied to the in-vivo tissues at different spatial positions without moving the endoscope catheter, and the suction of the waste through the opening in the working channel of the endoscope catheter can be observed, so as to further adjust the movement degree of the covering body head, and realize more dynamic and precise "flushing, brushing and suction" operation.

[0041] The present application significantly simplifies the endoscope system operation steps, reduces tissue damage, and fully removes various waste materials immediately during the operation; achieves immediate stone removal during the urinary stone operation, eliminates the risk of stone debris residue; fully removes ablation materials, pus, blood clots, infectious materials, etc. immediately during the operation, greatly saves the operation time, improves the operation quality, and reduces the treatment cost. BRIEF DESCRIPTION OF DRAWINGS

[0042] The drawings accompanying the present application are as follows:

[0043] FIG. 1A : Example 1, a stereoscopic schematic diagram, the endoscope catheter 1 is inserted into the sheath 3 and penetrates out, and the covering body 2 is partially cut open

[0044] FIG. 1B : Example 1, a cross-sectional schematic diagram of the endoscope catheter 1 and the sheath 3, and the arrow indicates the liquid flow direction during use FIG. 1C : Example 1, a cross-sectional view, the arrow indicates the liquid flow direction during use, and the dashed line shows the liquid flow path

[0045] FIG. 1D : Example 1, a cross-sectional view of entering the ear canal

[0046] FIG. 1E : Example 1, a cross-sectional view of the inflatable part 22 of the covering body entering the ear canal

[0047] FIG. 1F : Example 1, a partially cut open structural schematic diagram

[0048] FIG. 1G : Example 1, a stereoscopic schematic diagram of one scheme

[0049] FIG. 1H : Example 1, a component exploded schematic diagram of one scheme, the covering body 2 is cut open to show

[0050] FIG. 1I : Example 1, a partially cut open structural schematic diagram of another scheme

[0051] FIG. 2A : Example 2, a partially cut open structural schematic diagram

[0052] FIG. 2B : Example 2, a schematic diagram of the covering body after being inflated

[0053] FIG. 2C : Example 2, a partially cut open schematic diagram of the inflatable part 22 of the covering body in the inflated state

[0054] FIG. 2D : Example 2, a partially cut open schematic diagram of using a blocking balloon 24

[0055] FIG. 2E Partial cutaway view of another occlusion balloon 25 of Example 2

[0056] FIG. 3A Perspective view of the insertion of the sheath 2 into the vagina of Example 3

[0057] FIG. 3B Partial cutaway view of the sheath 2 of Example 3

[0058] FIG. 3C Partial cutaway view of the sheath 2 of Example 3

[0059] FIG. 4A Perspective view of Example 4

[0060] FIG. 4B Partial cutaway view of Example 4

[0061] FIG. 4C Use of Example 4 to clear a stone fragment P4 from a calyx K2

[0062] FIG. 4D Two different sheath head components 21e, 21f of Example 4

[0063] FIG. 5A Partial cutaway view of Example 5

[0064] FIG. 5B Cross-sectional view of Example 5

[0065] FIG. 5C Partial cutaway view of another configuration of Example 5

[0066] FIG. 5D Partial cutaway view of yet another configuration of Example 5

[0067] FIG. 5E Partial cutaway view of yet another configuration of Example 5

[0068] FIG. 5F Partial cutaway view of yet another configuration of Example 5

[0069] FIG. 5G Partial cutaway exploded view of a new configuration of Example 5

[0070] FIG. 5H Partial cutaway assembled view of a new configuration of Example 5

[0071] FIG. 5I Partial cutaway exploded view of another new configuration of Example 5

[0072] FIG. 5J : another new structure of embodiment 5, partially cutaway component assembly view

[0073] FIG. 5K : yet another new structure of embodiment 5, partially cutaway component exploded view

[0074] FIG. 6A : embodiment 6, partially cutaway view

[0075] FIG. 6B : embodiment 6, component exploded view, partially cutaway showing covering 2

[0076] FIG. 6C : another structure of embodiment 6, partially cutaway view

[0077] FIG. 7A : embodiment 7, covering 2 cutaway view, dynamic interlayer 200 not inflated

[0078] FIG. 7B : embodiment 7, covering 2 cutaway view, dynamic interlayer 200 inflated, driving covering head 21 to slide toward endoscope catheter head tip 111, arrow indicates direction of covering head 21 movement

[0079] FIG. 7C : embodiment 7, covering 2 cutaway view, dynamic interlayer 200 significantly inflated, driving covering head 21 to slide to a position closer to endoscope catheter head tip 111

[0080] FIG. 7D : perspective view showing a structure without annular barrier station 117

[0081] FIG. 7E : perspective view of one embodiment of embodiment 7, showing axial brush-like protrusions 212 and radial brush-like protrusions 222 DETAILED DESCRIPTION

[0082] The following are examples of embodiments that are not limiting of the present invention:

[0083] Embodiment 1:

[0084] As FIGS. 1A-1IAs shown, an integrated flushing and suction medical endoscope, 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 peeping component 112, and 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 of the external part. The working channel 10 of the endoscope catheter 1 is used for passing medical tools when in use, and provides guidance and 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. In this example, the tail 13 of the endoscope catheter is provided with a tail expansion area 132, and various endoscope-related electrical components can be integrated here. The information obtained by the peeping component 112 is connected to an external display and control device (omitted in the figure) through the connecting line 131 of the tail 13 of the endoscope catheter; a hollow sheath 3, including a sheath head 31, a sheath middle part 32, a sheath tail 33, and a sheath lumen 30 ( FIG. 1H (as shown) is provided with an inner sheath opening 301 and an outer sheath opening 302 for entering the body when in use. When in use, the top of the head 11 of the endoscope catheter 1 extends from the inner sheath opening 301 inserted into the body. In this example, the tail 33 of the sheath is connected with a sheath handle 34 for easy operation by the user; when in use, various treatment and diagnostic instruments can be placed in the working channel 10 of the endoscope catheter 1, such as various ablation catheters, biopsy forceps, airbag catheters, laser optical fibers, etc. After completing the stage operation, it is usually necessary to remove the waste material P at the treatment position. The existing technology is to insert a flushing tube through the working channel 10 or spray flushing liquid from the flushing channel on the endoscope catheter 1, and then the working channel 10 is sucked and discharged to the outside of the body through a negative pressure device.

[0085] In order to remove inflammatory secretions, ablation products, blood clots, stone fragments, various tissue clumps and other waste materials P from the natural cavity or other treatment position in the body to the outside of the body during the use of the endoscopic catheter 1, and to achieve the effect that is difficult to achieve with the existing technology, the present invention designs a hollow covering body 2, the covering body 2 is in the shape of a thin sleeve, and the covering body 2 is composed of a covering body head 21, a covering body expandable part 22, and a covering body sleeve part 23, preferably a transparent or translucent material, and the covering body expandable part 22 is preferably a flexible material with good compliance such as silicone rubber, latex, thermoplastic The cover is made of a flexible elastic body (the expandable part 22 of the covering can also be made of non-compliant or semi-compliant materials); when in use, the covering 2 is sleeved on the outside of the endoscope catheter 1 and wraps at least part of the area of ​​the endoscope catheter head 11. In this example, the covering sleeve part 23 is provided with a plurality of notches on the inner wall, which become the dynamic interlayer liquid inlet 202 after being fitted with the endoscope catheter 1. A through hole can also be provided to directly become the dynamic interlayer liquid inlet 202 without being fitted with the endoscope catheter 1 (not shown); the thin-walled covering expandable part 22 connecting part 221 is connected to the annular part by bonding, welding, etc. The thin-walled portion 232 of the covering sleeve portion 23 is connected as a whole; the annular covering sleeve portion 23 is sleeved and fixed on the outer surface of the endoscope catheter 1, so that the endoscope catheter 1 can drive the covering 2 to move synchronously; after the covering 2 is sleeved, the opening 101 in the working channel of the endoscope catheter 1 and the peeping component 112 are still exposed to the outside, and the gap between the outer surface area of ​​the covered endoscope catheter 1 and the expandable portion 22 of the covering constitutes a dynamic interlayer 200, while the gap between the sheath 3 and the outer surface of the endoscope catheter 1 constitutes a static interlayer 300; the sheath tail 33 is provided with The ring-shaped elastic sealing body S1 is in interference contact with the outer surface of the endoscope catheter 1 during relative movement, so that the static interlayer 300 is sealed to the outside (the elastic sealing body S1 can also be omitted, and the local sheath lumen is reduced so that the outer surface of the endoscope catheter 1 and the sheath can move relative to each other while being sealed to the external liquid, which is not shown in the figure). When in use, the external liquid, i.e., the flushing liquid, enters the static interlayer 300 through the opening 3002 of the hollow sheath side branch 3001 on the sheath tail 33. The flushing liquid entering the static interlayer 300 first passes through the dynamic interlayer liquid inlet 202 on the covering body sleeve 23 ( FIG. 1C The liquid enters the dynamic interlayer 200 and then passes through the dynamic interlayer outlet 201 ( FIG. 1CThe local enlarged view shows that the dynamic interlayer outflow port 201 has at least three types: axial outflow port 201a, oblique outflow port 201b and radial outflow port 201c, which can spray or flow forward, and each type of dynamic interlayer outflow port 201 meets different clinical flushing requirements. The specific angle of the dynamic interlayer outflow port 201 can be adjusted within a certain range when initially set. The liquid and flushing materials after flushing are sucked into the working channel 10 through the inner opening 101 of the working channel of the endoscope catheter 1 and then discharged to the outside of the body through the outer opening 102 of the working channel. When in use, the negative pressure pipeline and related negative pressure suction device (not shown) need to be connected to the outer opening 102 of the working channel. In order to remove the waste material P that may be adhered to the mucosa, when the water flow is difficult to flush out, the axial brush-shaped protruding body 212 of the covering body head 21 is used to brush off the waste material P from the mucosa.

[0086] As FIG. 1D The covering body inflatable part 22 of the present application can be partially covered in the external auditory canal E, and the tip 111 of the endoscope catheter head is adjacent to the tympanic membrane T. When the pressure of the flushing liquid is small, the flushing liquid flows out through the axial outflow port 201a, the oblique outflow port 201b and the radial outflow port 201c, and the pus P1 in the external auditory canal E is flushed out under visual conditions. The axial brush-shaped protruding body 212 can also be used to brush the pus P1 into the flushing liquid, and the pus P1 enters the working channel 10 and is sucked to the outside of the body by negative pressure. Because the pressure of the flushing liquid is small, the covering body inflatable part 22 does not deform or only slightly expands outward.

[0087] As FIG. 1EWhen the external flushing liquid D enters the dynamic interlayer 200 with a large pressure, the thin-walled expandable portion 22 of the covering body made of elastic material is rapidly filled and expanded while the wall thickness is reduced. The test shows that: even if the flushing liquid D is ejected from each dynamic interlayer outlet 201, the expandable portion 22 of the covering body will be significantly filled and expanded, and at the same time, the volume of the dynamic interlayer 200 will be increased, resulting in a widened flow channel and a significant increase in the flow rate of the flushing liquid D. After expansion, due to the elastic restoring force of the expandable portion 22 of the covering body and the uneven flow of the flushing liquid in the dynamic interlayer 200, the expansion state of the expandable portion 22 of the covering body after filling will continue to change under a certain pressure, and the covering body The expandable portion 22 is in a fluctuating or peristaltic shape, driving the liquid outlet direction of the dynamic interlayer liquid outlet 201 to continuously change within a certain range, increasing the area of ​​the flushing area that the flushing liquid can directly reach, and improving the flushing effect; the far end of the expandable portion 22 of the covering body that is deformed forward drives the dynamic interlayer liquid outlet 201 to extend forward synchronously, achieving the effect of close dynamic flushing that is difficult to achieve with the existing technology; the elastic restoring force of the expandable portion 22 of the covering body after expansion further increases the flushing pressure in the dynamic interlayer 200, increases the flushing liquid flow rate of the dynamic interlayer liquid outlet 201, and thus further improves the flushing effect. The arrows in the figure indicate the flow direction of the flushing liquid, and the dotted line The inflatable portion 22 of the covering body can block the opening of the external auditory canal E after being filled and expanded, thereby preventing the rinsing liquid D and pus P1 from flowing directly out of the gap between the covering body 2 and the external auditory canal E, eliminating or reducing the operation of cleaning the pus P1 to flow to the facial skin, saving treatment and nursing time; the drape 2 that expands in an undulating or peristaltic manner can radially press the natural cavity mucosa or other body tissues in real time, play a deep massage role, promote lymphatic and venous return, and improve local blood supply; the covering body head 21 is provided with a tubular embedded section 211 that passes through the upper and lower parts, and is embedded in the opening 101 of the working channel of the endoscope catheter 1 to insert the covering body head 21 It is fixedly connected to the endoscope catheter head 11, and the covering head 21, especially the tubular embedded section 211, can be made of a relatively hard material to ensure that it is not easy to fall out from the opening 101 in the working channel of the endoscope catheter. The covering head 21 is tightly attached to the top 111 of the endoscope catheter 1 head, and the part of the peeping component 112 is hollowed out or at least transparent; the distal end of the expandable part 22 of the covering is connected to the edge of the covering head 21 by bonding, welding, etc. (the specific connection boundary line is omitted in the figure); the covering head 21 can also be made of elastic material, and the tubular embedded section 211 is embedded in the hard working channel opening 101 by interference fit and is not easy to fall out.

[0088] Since the expandable portion 22 of the covering is flexible, the portion of the covering head 21 covering the top end 111 of the endoscope catheter head is also flexible, and the endoscope catheter 1 is flexibly covered when entering the body, significantly reducing the mechanical damage of the relatively rigid endoscope catheter 1, especially the endoscope catheter head 11, to the mucosa and other tissues in the body.

[0089] Further, the hydrophilic coating layer can be applied to at least the outer surface of the sheath head 21 and / or the sheath inflatable part 22. The hydrophilic polymer material such as polyvinylpyrrolidone, polyacrylamide, polyethylene glycol, polyvinyl alcohol, and the like can be used. The composite antibacterial agent can also be added to the coating layer to significantly improve the lubricating performance of the sheath 2 covering the endoscope catheter 1 part, reduce the contact resistance, further reduce the mechanical damage of the operation to the mucosa and other internal tissues, and be more beneficial to the deformation and swelling process of the sheath inflatable part 22. The inner surface of the sheath inflatable part 22 also has a hydrophilic coating layer, which is also helpful for the rapid filling of the flushing liquid D.

[0090] FIG. 1F The sheath inflatable part 22 is shown from another perspective after being filled with the flushing liquid D. The wall thickness of the sheath inflatable part 22 is thinned, and the dynamic sandwich outlet 201 is located forward.

[0091] FIG. 1G A sheath 2 structure different from the above-mentioned illustration is shown. Specifically, a plurality of axially brush-shaped protrusions 212 extending to the distal end are arranged around the edge of the sheath head 21, and a plurality of radially brush-shaped protrusions 222 are arranged around the distal end of the sheath inflatable part 22, i.e., the area adjacent to the sheath head 21. When the radially brush-shaped protrusions 222 are in close proximity to the dynamic sandwich outlet 201, such as a distance of less than 1 mm or even less than 0.2 mm, the flushing liquid D with high pressure enters the dynamic sandwich 200, and the sheath inflatable part 22 is filled and swells, which can drive the dynamic sandwich outlet 201 to protrude forward, so that the flushing area is constantly changing, and the position of the radially brush-shaped protrusions 222 is constantly moving, which has a better brushing effect. Combined with the negative pressure suction in the working channel 10, the endoscope system realizes the "flushing, brushing, and suction integration" and is an ideal function of dynamic integration, which improves the treatment efficiency of the endoscope system and greatly saves the cost.

[0092] FIG. 1H The annular sheath sleeve part 23 is shown with inward protruding ribs 231. In use, the sheath 2 is connected with the endoscope catheter 1 by embedding the protruding ribs 231 of the sheath sleeve part 23 into the grooves 121 on the outer surface of the middle part 12 of the endoscope catheter. The two are easily separated. However, when the two are located in the sheath lumen 30, the outer surface of the annular sheath sleeve part 23 is in close contact with the inner wall of the sheath, and the sheath sleeve part 23 cannot be separated when the endoscope catheter 1 moves in the sheath lumen 30. When the endoscope catheter 1 is free from the sheath 3, the annular sheath sleeve part 23 can be easily removed from the endoscope catheter 1 by applying force axially on the outer surface. Different from the foregoing scheme, the sheath head 21 is provided with a hollow area 213, and the exploring assembly 112 of the head top end 111 of the endoscope catheter 1 is located in the hollow area 213. In this case, the sheath head 21 can be made of non-transparent material.

[0093] FIG. 1I A solution is shown: in order to more accurately suction waste substance P in surgery, especially when the waste substance P is far away from the opening 101 in the working channel of the endoscope catheter 1, a flexible tubular sheath head probe suction body 214 is arranged on the sheath head 21, the waste substance P enters the probe suction body lumen 2140 through the probe suction body inlet 2141, and then enters the working channel 10, realizing the effect of flexible close proximity accurate suction, the sheath head probe suction body 214 can also be arranged in a curved shape with different angles according to different application scenarios (not shown), and the possible in-vivo suction dead angle can be better eliminated.

[0094] The present application covers medical endoscope hard and soft scopes, the said exploring assembly 112 refers to one or a combination of electronic or optical endoscope assembly, pressure sensor, temperature sensor, body fluid conductivity sensor, pH sensor, ultrasonic probe, etc.; the head of the endoscope catheter in the present application refers to the part of the opening in the sheath tube or the bendable part in the working state, many kinds of endoscope catheter 1 can be provided with a member for actively or passively bending the endoscope catheter head 11 (not shown), the sheath 2 is sleeved on at least part of the endoscope catheter 1 head 11, which means that the entire sheath 2 is sleeved on the endoscope catheter 1 head 11, or the sheath sleeving part 23 is located on the middle part 12 of the endoscope catheter 1, and the sheath inflatable part 22 is sleeved on the endoscope catheter 1 head 11; the said exploring assembly 112 is still exposed to the outside, which means that even if the sheath head 21 wraps the endoscope catheter 1 head top end 111, the exploring assembly 112 position still needs to be left out or covered with light-transmitting material, so that the function of the exploring assembly 112 is "exposed" and not disturbed or not significantly disturbed, and when the exploring assembly 112 contains an ultrasonic probe or a non-visible light probe, the sheath head 21 does not interfere with its function; the sheath sleeving part 23 can be displaced synchronously with the endoscope catheter 1 after being connected with the endoscope catheter 1; the said static interlayer 300 refers to the internal gap volume being stable like in a static state when the endoscope catheter 1 passes through the sheath tube 3, whether the endoscope catheter 1 is stationary or moving; the said dynamic interlayer 200 refers to the interlayer volume increasing due to the outward expansion and expansion of the sheath inflatable part 22 when liquid enters, and decreasing due to the retraction of the sheath inflatable part 22, and the volume of the dynamic interlayer 200 will change dynamically in use.

[0095] The total preset area of the dynamic sandwich liquid inlet 202 is greater than the total preset area of the dynamic sandwich liquid outlet 201. This design is to increase the pressure difference between the inside of the dynamic sandwich 200 and the outside of the dynamic sandwich liquid outlet 201, and to improve the flow rate of the liquid flowing out of the dynamic sandwich liquid outlet 201, so as to fully exert the flushing and flushing effect of the liquid. There is a situation that even if the total preset area of the dynamic sandwich liquid inlet 202 is smaller than the total area of the dynamic sandwich liquid outlet 201, the dynamic sandwich 200 is relatively long, especially the part of the dynamic sandwich 200 extending from the sheath inner opening 301 is relatively long, the resistance in the dynamic sandwich 200 is relatively large, and the liquid is easy to drive the expandable part 22 of the covering body to expand outwardly, and the elastic recovery force generated can increase the pressure difference between the inside of the dynamic sandwich 200 and the outside of the dynamic sandwich liquid outlet 201. Another situation is that due to the fact that the head top end 111 of the endoscope catheter 1 is easy to be squeezed and filled by the body tissue, the dynamic sandwich liquid outlet 201 cannot be fully opened, resulting in that the actual total area of the dynamic sandwich liquid outlet 201 is smaller than the total preset area of the dynamic sandwich liquid inlet 202. In actual use, even if the area of a single dynamic sandwich liquid outlet 201 is very small, such as 0.1㎜ 2 When the dynamic sandwich liquid outlet 201 is arranged on the expandable part 22 of the covering body, the area of the dynamic sandwich liquid outlet 201 will also instantaneously increase in the expanded state, and the liquid injection direction will also change constantly, thereby achieving the effect of increasing the flushing area. When placed in a relatively spacious space such as a bladder, a renal pelvis, an intestinal tract, and other natural cavities with different shapes, the expandable part 22 of the covering body will exhibit peristalsis or undulation and irregular movement, constantly squeezing and expanding the mucosa of the natural cavity, improving local blood supply, promoting venous and lymphatic return, and also changing the liquid outlet direction and liquid flow rate of the dynamic sandwich liquid outlet 201, thereby increasing the flushing area.

[0096] Example 2

[0097] As shown in FIGS. 2A-2E , the application scenario of this example is an anorectal endoscopic operation, the sheath inner opening 301 is located in the vicinity of the anal opening A0, and the endoscope catheter 1 with the covering body 2 enters the anal canal cavity A30, as shown in FIG. 2A , the head 11 of the endoscope catheter enters the rectal ampulla A2, and the un-filled expandable part 22 of the covering body contacts the anal canal wall A3 and is adjacent to the fecal debris P2 in the anal sinus A1. A plurality of radial liquid outlets 201c of the dynamic sandwich of the covering body are arranged in the region of the expandable part 22 of the covering body, and a plurality of axial liquid outlets 201a are arranged adjacent to the head 21 region of the covering body FIG. 2B); when the flushing is started, the flushing liquid D enters the dynamic interlayer 200, the volume of the expandable part 22 of the coating body is increased, the anal canal wall A3 is radially extruded, the anal canal cavity A30 is expanded, the fecal debris P2 and other waste materials in the anal canal wall A3 and the anal sinus A1 are fully exposed, the flushing liquid D is sprayed from each radial liquid outlet 201c, combined with the negative pressure suction in the working channel 10, the patient's body position is adjusted during operation so that the anal orifice A0 is upward, the fecal debris P2 and the like are flushed to the rectal ampulla A2 and then sucked into the working channel 10, and the axial liquid outlet 201a can clean the intestinal wall around the rectal ampulla A2; FIG. 2C An expanded state of the expandable part 22 of the coating body is shown, and the flexible extrusion and massage of the anal canal wall A3 by the undulating or peristaltic expandable part 22 promotes lymphatic venous return, improves arterial blood supply, and helps to relieve hemorrhoids; the fecal debris P2 and harmful waste materials in the anal sinus A1 are fully removed, which can prevent and treat diseases such as anal sinusitis and anal fissure.

[0098] In order to fully and accurately flush the anal canal cavity A30, avoid too much flushing liquid D from entering the rectal ampulla A2, FIG. 2D A plugging scheme is shown, using a protruding plugging body to plug the area below the rectal ampulla A2, in this example, the protruding plugging body is an independent plugging sac 24 that can be inflated after being filled with fluid, the hollow independent plugging sac fluid delivery pipe 241 is protruded through the inner opening 101 in the working channel of the endoscope catheter, gas or liquid is filled into the independent plugging sac lumen 240, the independent plugging sac 24 is inflated and expanded to seal with the intestinal wall at the rectal ampulla A2, the fecal debris P2 in the anal canal cavity A30 below the independent plugging sac 24 is flushed and sucked into the working channel 10, and then removed to the outside of the body through the outer opening 102 of the working channel without being flushed into the rectal ampulla A2 and retained in the body.

[0099] FIG. 2EAnother outreaching occlusion body structure is shown, specifically a contiguous occlusion balloon 25 that is outreached distally from the sheath head 21, the contiguous occlusion balloon 25 is connected to the sheath head 21 by a contiguous occlusion balloon middle section 253 that serves as a support, the contiguous occlusion balloon middle section 253 is provided with a window 252, when negative pressure suction is activated, fecal debris P2 enters the working channel inner opening 101 via the window 252, the hollow contiguous occlusion balloon fluid delivery tube 251 distal end penetrates the endoscope working channel 10 via the working channel inner opening 101 and terminates at the contiguous occlusion balloon 25, the contiguous occlusion balloon fluid delivery tube inner opening 2512 is in communication with the contiguous occlusion balloon inner cavity 250, the contiguous occlusion balloon fluid delivery tube proximal end opening 2511 is located outside the endoscope catheter tail 13, the gap between the contiguous occlusion balloon fluid delivery tube 251 and the working channel 10 is filled with a sealing plug S2, the endoscope catheter working channel outer opening 102 is provided on the hollow tail side branch 133, in use, fluid can be injected into the contiguous occlusion balloon inner cavity 250 via the contiguous occlusion balloon fluid delivery tube proximal end opening 2511 to make it distend and swell, the increased volume of the contiguous occlusion balloon 25 can occlude the area below the rectal ampulla A2 (not shown).

[0100] Example 3:

[0101] As FIGS. 3A-3C An application scheme of the endoscope system of the present application in the vagina N2 is shown, external flushing fluid D enters the dynamic sandwich 200 from the hollow sheath side branch 3001 opening 3002 on the sheath tail 33, making the sheath inflatable part 22 distend and swell to dilate the vagina N2, making the vaginal folds N3 shallower, the flushing fluid D flow washes off the inflammatory substances P3 on the vaginal mucosa, to avoid the inflammatory substances P3 retrograde into the uterine cavity N4 via the cervical os N0, another outreaching occlusion body structure is shown, a flexible cervical occlusion cap 26 that is outreached distally from the sheath head 21, the cervical occlusion cap 26 is mushroom head-shaped and connected to the sheath head 21 by a cervical occlusion cap neck 261, the tubular cervical occlusion cap neck 261 is provided with an occlusion cap neck opening 2611, the occlusion cap neck opening 2611 is in communication with the endoscope catheter working channel inner opening 101 through an occlusion cap neck inner cavity 2610; in use, the cervical occlusion cap 26 is first brought into abutment with the cervix N1 under vision, the cervical os N0 is occluded, then the flushing fluid D is released, the inflammatory substances P3 that have fallen off the vaginal mucosa are sucked into the endoscope catheter working channel 10 via the occlusion cap neck opening 2611 under negative pressure suction and then removed to the outside of the body, FIG. 3CIt is shown that the flushing liquid D fills and expands the expandable part 22 of the covering body protruding from the opening 301 in the sheath, and is also provided with a large number of radial liquid outlets 201c for flushing the vagina N2. The flexible cervical sealing cap 26 protruding from the distal end of the covering head 21 is provided with a depression, which can wrap around the cervical opening, and the inflammatory substance P3 is attracted to the outside of the body through the narrow and long opening 2611 of the neck of the cervical sealing cap.

[0102] Example 4:

[0103] like FIGS. 4A-4D The present invention is applied to the urinary system, and is used for endoscopic laser lithotripsy. The endoscopic catheter 1 passes through the slender sheath 3 that can enter the ureter and enters the renal pelvis K1. The laser fiber (omitted in the figure) passing through the working channel 10 of the endoscopic catheter visually breaks up the larger stones into a large number of stone fragments P4. The working channel 10 is simultaneously flushed with physiological saline, which flows through the static interlayer 300 from the opening 3002 of the sheath side branch 3001 to the outside of the body, taking away the heat generated by the laser work and some stone fragments P4. At this time, the covering body 2 can be removed. Combined with the endoscopic catheter 1, when it is time to clean the stone debris P4, the endoscopic catheter 1 is withdrawn from the sheath 3 and the drape 2 is placed on it. The endoscopic catheter 1 and the drape 2 then enter the renal pelvis K1 and calyx K2 for operation. In this case, the direction of the fluid changes, and the external flushing fluid enters the dynamic interlayer 200 through the static interlayer 300 and the dynamic interlayer liquid inlet 202 from the sheath side branch opening 3002. The expandable part 22 of the drape is filled and expanded. In order to control the expansion degree of different parts and the rhythm of fluctuation or peristalsis after expansion, FIG. 4B The annular protruding rib 223 protruding from the inner surface of the drape expandable portion 22 is shown. A plurality of annular protruding ribs 223 can be provided, and the protruding degrees can be set to different levels, so as to easily drive the drape expandable portion 22 to fill and expand in stages. FIG. 4C The expanded portion 22 of the covering has two expansion stages within the renal pelvis K1. The first expansion stage is adjacent to the top of the endoscope catheter head. After expansion, the renal calyx opening K0 is directly blocked. During the three-in-one process of flushing with water through the dynamic interlayer outlet 201, brushing off by the axial brush-like protrusion 212, and negative pressure suction by the working channel 10, the numerous stone fragments P4 within the renal calyx K2 are difficult to escape from the blocked renal calyx opening K0 to the renal pelvis K1, thereby achieving full cleaning of the stone fragments P4 under visual inspection and eliminating the risk of residual stone fragments P4.

[0104] FIG. 4AThe endoscope working channel outer opening 102 is shown on the endoscope catheter handle 14, and the endoscope catheter handle 14 is also provided with a control rod 141 for adjusting the bending of the endoscope catheter head 11. The bending member (not shown) of the endoscope catheter head 11 is controlled by pulling the wire, and the sheath tail 33 is provided with a detachable external sealing body S3. The endoscope catheter 1 passes through the external sealing body S3 and enters the sheath lumen. When the covering body 2 needs to be installed, the endoscope catheter 1 is mostly withdrawn from the external sealing body S3, the external sealing body S3 is separated from the sheath outer opening, and then the covering body 2 is sleeved on the endoscope catheter head 11. After the endoscope catheter head 11 enters the sheath lumen, the external sealing body S3 is assembled on the sheath outer opening.

[0105] When the sheath 3 with an outer diameter of 14 Fr and an inner diameter of 12 Fr is used to enter the ureter U, the outer diameter of the endoscope catheter 1 is 8.6 Fr, and the cross-sectional area of the static layer 300 is much smaller than that of the dynamic layer 200 after the inflatable part 22 of the covering body is inflated (after inflation in the renal pelvis K1, the cross-sectional area of the dynamic layer 200 can be tens of times larger than that of the static layer). The flow resistance generated by the flushing fluid channel area is significantly reduced, ensuring the flushing effect.

[0106] In the prior art, the flushing liquid D flows out through the working channel inner opening 101, and the powdered stone debris (about 250 μm) can be sucked out of the body by negative pressure through the static layer 300, but the stone debris P4 with a size of about 1 mm cannot enter the narrow static layer 300. In the present application, the stone debris P4 with a size of about 1 mm can be easily sucked into the relatively wide endoscope catheter working channel 10 (the inner diameter is usually greater than 1 mm), and the stone removal effect is significantly better than that of the prior art for removing stone debris P4 from the static layer 300.

[0107] FIG. 4D The left side shows a thin-walled short tubular covering body head component 21e, and the wall thickness can be preferably set between 0.1 mm and 0.65 mm in specific applications. The inflatable part 22 of the covering body is bonded or welded to the outer surface of the short tubular covering body head component 21e through the connecting section 224, and the dynamic layer outlet 201 is provided on the inflatable part 22 of the covering body. The right side shows another thin-walled folded short tubular covering body head component 21f, and the inflatable part 22 of the covering body is clamped between the folded part of the folded short tubular covering body head component 21f through the connecting section 224. The dynamic layer outlet 201 can pass through the folded short tubular covering body head component 21f.

[0108] In specific use, the bending angle of the endoscope catheter head 11 and the suction pressure can be adjusted according to the position of the stone debris P4 on the basis of visualization, and the "flushing, suctioning and brushing" integration can completely clean the stone debris in the renal calyx. The present application is also applicable to the removal of waste materials such as inflammatory substances and ablation products in various blind end cavities such as sinuses and appendixes.

[0109] In the present application, in order to make the inflatable part 22 of the covering body swell in a wave or irregular peristalsis or preset stage of significant expansion, the inflatable part of the covering body has structural and morphological characteristics such as corrugated undulations, uneven wall thickness, phased differences in wall thickness, intermittent or continuous thread distribution, and protrusions, which can protrude inward and / or outward.

[0110] Example 5:

[0111] As FIG. 5A , FIG. 5B Unlike the previous examples, the covering body head part 21 is a separate covering body head part 21a, which is circumferentially sealed to the distal end of the inflatable part 22 of the covering body. The tubular embedded segment 211 at the distal end of the covering body head part 21a has a hollow root segment 215, and the inner opening 2150 of the root segment is located on the upper surface of the separate covering body head part 21a. Since the root segment 215 of the covering body head part 21a has a larger outer diameter, it will not enter the working channel 10 of the endoscope catheter, forming a top end gap 203 at the top end of the endoscope catheter head 11. The flushing liquid can enter the top end gap 203 and then be sprayed out, ensuring the stability of the flushing water flow. When the flexible covering body head part 21 hits the mucosa or other biological tissues in the body, the flexible separate covering body head part 21a can deform towards the top end gap 203, providing a buffer protection effect and ensuring the safety of the operation. This scheme shows a hollow axial brush-shaped protruding body 212, the inner cavity 2120 of which can pass through the flushing liquid. The brush and flushing are highly integrated during use, which is more conducive to cleaning waste materials, especially waste materials in mucosal folds. The concept of synchronous spraying of flushing liquid can also be applied to radial brush-shaped protruding bodies and oblique brush-shaped protruding bodies (not shown). The dynamic interlayer axial liquid outlet 201a, oblique liquid outlet 201b, and radial liquid outlet 201c of this example are all arranged on the separate covering body head part 21a.

[0112] FIG. 5C Another structure is shown, in which the top end 111 of the endoscope catheter head is connected to a tubular endoscope catheter head protruding suction body 113. Radial suction holes 1130 can be formed in the side wall of the endoscope catheter head protruding suction body 113. During use, waste materials enter the inner opening 101 of the working channel of the endoscope catheter through the inner opening 1131 and radial suction holes 1130 of the endoscope catheter head protruding suction body 113, avoiding blockage of the suction port and ensuring smooth negative pressure suction. The protruding suction body 113 can also be curved (not shown), which is convenient for suctioning waste materials located laterally at the top end of the endoscope head.

[0113] FIG. 5DAnother structure is shown, specifically the pipe-shaped covering head upward extension segment 216 is connected to the covering head 21, the pipe-shaped covering head upward extension segment 216 has a larger internal space, a larger suction opening, i.e. the covering head upward extension segment opening 2160, which increases the suction area; the endoscope catheter head 11 has an annular recess 114 on the outer surface, and the covering head 21 has a covering head inward protruding rib 217 embedded in the annular recess 114, which connects the covering head 21 and the area near the top end 111 of the endoscope catheter head 11, so that the covering head 21 will not be separated from the endoscope catheter head 11 when the covering inflatable part 22 is filled and inflated. FIG. 1I The covering head 21 has a larger internal space, a larger suction opening, i.e. the covering head upward extension segment opening 2160, which increases the suction area; the endoscope catheter head 11 has an annular recess 114 on the outer surface, and the covering head 21 has a covering head inward protruding rib 217 embedded in the annular recess 114, which connects the covering head 21 and the area near the top end 111 of the endoscope catheter head 11, so that the covering head 21 will not be separated from the endoscope catheter head 11 when the covering inflatable part 22 is filled and inflated.

[0114] FIG. 5E The structure shown is that the covering head 21 is annular, the covering head inward protruding rib 217 is embedded in the annular recess 114 on the outer surface of the endoscope catheter head 11, and the inward protruding rib 217 can be continuous or discontinuous, and the covering inflatable part 22 is connected to the covering head 21, which does not affect the working channel opening 101 in the top end 111 of the endoscope catheter head and the working of the exploring assembly 112, and the field of view and image clarity are not disturbed.

[0115] FIG. 5F The further scheme shown is that the endoscope catheter head 11 is provided with multiple annular recesses 114 in stages, and the covering head 21 can be assembled in the corresponding annular recess 114 according to the needs, which is used to adjust the distance between the dynamic sandwich axial liquid outlet 201a, the oblique liquid outlet 201b, the radial liquid outlet 201c and the top end 111 of the endoscope catheter head, so as to more accurately flush, which can be adjusted multiple times in one operation.

[0116] FIG. 5G A ring-shaped covering head component 21b with a cross-section in the shape of "L" is shown, the covering inflatable part 22 is connected to the ring-shaped covering head component 21b through the connecting segment 224, and the ring-shaped covering head component 21b is made of relatively hard material, while the covering inflatable part connecting segment 224 is made of flexible material to wrap the outer edge of the ring-shaped covering head component 21b, avoiding possible mechanical damage during use; the top end of the endoscope catheter head 11 is provided with a fitting segment 115 with a slightly reduced outer diameter, and the ring-shaped covering head component 21b is tightly fitted outside the endoscope catheter head fitting segment 115, and the stepped endoscope catheter head fitting segment lower edge 1151 can limit the downward displacement of the ring-shaped covering head component 21b; FIG. 5HThe state of the ring-shaped coating head part 21b assembled with the endoscope catheter head 11 is shown; the ring-shaped coating head part 21b can also be in a rectangular, arc-shaped or other shape in cross section, and can be entirely fitted in the endoscope catheter head top end 111 region.

[0117] FIG. 5I Another overall ring-shaped partial internal protrusion coating head part 21c is shown, which is provided with a plurality of internal protrusion segments 218, and the endoscope catheter head 11 is provided with a plurality of edge notches 116 extending to the edge of the head top end 111; as FIG. 5J The internal protrusion segments 218 of the partial internal protrusion coating head part 21c are embedded in the endoscope catheter edge notches 116 during assembly to tightly connect; the ring-shaped partial internal protrusion coating head part 21c is also provided with an inward notch 2180, which is fitted with the outer surface of the endoscope catheter head 11 after assembly, and the gap between them forms a dynamic sandwich axial liquid outlet 201a; the coating inflatable part 22 is integrated with the partial internal protrusion coating head part 21c by bonding or welding through the connecting segment 224, and the partial internal protrusion coating head part 21c of the present scheme can be made of relatively flexible material; FIG. 5J The state of the partial internal protrusion coating head part 21c assembled with the endoscope catheter head 11 is shown.

[0118] FIG. 5K Another overall hat-shaped coating head part 21d is shown, which is provided with a tubular embedded segment 211 that passes through from top to bottom, which is inserted into the endoscope catheter working channel 10 during use, and the coating inflatable part 22 is integrated with the edge part of the hat-shaped coating head part 21d by bonding or welding through the connecting segment 224, or can be made by secondary forming (including pre-forming the hat-shaped coating head part 21d as an insert when molding the coating inflatable part 22).

[0119] Example 6:

[0120] As FIGS. 6A-6CThe biggest difference between the embodiment and the previous embodiment is that the covering body 2 is directly used with the endoscope catheter 1 without the need of the integrated medical endoscope with the sheath 3 to form the flushing liquid passage. The endoscope catheter 1 is provided with a head 11 area of a viewing assembly 112. The endoscope catheter 1 is provided with a working channel 10 extending through the head and tail. The working channel 10 is provided with a working channel inner opening 101 entering the body during use and a working channel outer opening 102 outside the body. The covering body 2 is hollow and is composed of a covering body head 21, a covering body inflatable part 22 and a covering body sleeve part 23. The covering body 2 is sleeved on the outside of the endoscope catheter 1 and wraps at least part of the area of the endoscope catheter head 11. The endoscope catheter working channel inner opening 101 and the viewing assembly 112 are still exposed to the outside. The gap between the outer surface of the endoscope catheter 1 and the covering body inflatable part 22 is a dynamic interlayer 200. The endoscope catheter 1 is provided with an interlayer side branch 1003 in addition to the working channel 10. The liquid inlet channel 100 in the interlayer side branch 1003 is provided with a liquid inlet channel outer opening 1002 and a liquid inlet channel inner opening 1001. The liquid inlet channel inner opening 1001 inside the endoscope catheter 1 is in communication with the dynamic interlayer 200. During use, the external liquid enters the dynamic interlayer 200 from the liquid inlet channel outer opening 1002, the liquid inlet channel 100, the liquid inlet channel inner opening 1001 and then flows out from the dynamic interlayer outlet 201 of the covering body head 21 at the distal end. The flushing liquid D and the waste materials flushed away after flushing the body tissues are sucked into the working channel 10 through the endoscope catheter working channel inner opening 101 and then discharged to the outside of the body through the working channel outer opening 102. The arrow indicates the liquid flow direction. As shown in FIG. 6B The component exploded view shows that the covering body inner cavity 220 at least accommodates the endoscope catheter head 11. The covering body sleeve part 23 and the endoscope catheter 1 are connected in an external sealing and easily detachable manner. The external sealing means that after the connection, the liquid inlet channel 100 of the endoscope catheter 1 in communication with the outside is in communication with the dynamic interlayer 200. The liquid entering the liquid inlet channel 100 from the outside of the body can only enter the dynamic interlayer 200 and cannot directly flow to other places. The easily detachable and easily mountable connection can use the covering body 2 as a disposable product to avoid cross infection and the influence of repeated disinfection on the function of the covering body. As shown in FIG. 6C The covering body 2 and the endoscope catheter 1 can also be tightly connected as a whole. The covering body sleeve part 23 is directly bonded or welded to the outer surface of the endoscope catheter 1 so that the liquid inlet channel inner opening 1001 inside the endoscope catheter 1 is in communication with the dynamic interlayer 200. The whole is disposable to completely eliminate the risk of infection caused by repeated use due to disinfection failure.

[0121] Embodiment 7:

[0122] As shown in FIG. 7AAs shown, the dynamic sandwich 200 is not filled, and the difference between this example and the previous one is that the head of the coating body is in contact with the head 11 of the endoscope catheter, and the relative position is easy to change. Specifically, a "L"-shaped overall annular coating body head component 21b is shown, and the annular coating body head component 21b is sleeved on the head 11 of the endoscope catheter, leaving a circumferential gap 118 between the outer surface of the head 11 of the endoscope catheter and the annular coating body head component 21b. An annular intermittent or continuous barrier platform 117 is arranged below the top end 111 of the head of the endoscope catheter, and the barrier platform 117 ensures that the annular coating body head component 21b does not come off the top end 111 of the head of the endoscope catheter during use. When the dynamic sandwich 200 is filled, the circumferential gap 118 can also spray the flushing liquid. Due to the existence of the circumferential gap 118, when the dynamic sandwich 200 is filled with the flushing liquid D, the pressure in the dynamic sandwich 200 increases, and the annular coating body head component 21b is driven to slide towards the top end 111 of the head of the endoscope catheter. The arrow indicates the moving direction of the coating body head, FIG. 7B When the dynamic sandwich 200 is filled with the flushing liquid D, the pressure in the dynamic sandwich 200 increases, and the annular coating body head component 21b is driven to slide towards the top end 111 of the head of the endoscope catheter. The arrow indicates the moving direction of the coating body head, FIG. 7C As shown, the dynamic sandwich 200 is significantly filled, and the annular coating body head component 21b is driven to slide to a position closer to the top end 111 of the head of the endoscope catheter. At the same time, the coating body inflatable part 22 expands outward and forward, and the positions of various types of dynamic sandwich liquid outlets 201 move forward with the annular coating body head component 21b. The outlet angles of the oblique liquid outlets 201b and the radial liquid outlets 201c also change with the expansion state of the coating body inflatable part 22, and the sprayed flushing liquid D can flush more areas. The radial liquid outlets 201c also change to oblique liquid outlets due to the change of the outlet angle. The barrier platform 117 ensures that the annular coating body head component 21b does not come off the top end 111 of the head of the endoscope catheter during use, which means that the annular coating body head component 21b can break through the barrier platform 117 when installed, and the pressure of the flushing liquid D entering the dynamic sandwich 200 during use is controlled within a certain range. The force driving the annular coating body head component 21b to move forward does not break through the barrier platform 117.

[0123] FIG. 7D As shown, the endoscope catheter 1 does not have a barrier platform, and the annular coating body head component 21b can be ensured not to come off the top end 111 of the head of the endoscope catheter during use by controlling the pressure in the dynamic sandwich 200, setting the material hardness of the coating body inflatable part 22, and setting the axial length of the coating body inflatable part 22.

[0124] FIG. 7EIt is shown that the coating body 2 is also provided with axial brush-shaped protrusions 212 and radial brush-shaped protrusions 222, especially the radial brush-shaped protrusions 222 change the spatial position when the coating body inflatable part 22 is inflated, so that it can act on a larger area, and the position of the dynamic interlayer outflow port 201 also changes synchronously, combined with the negative pressure suction in the working channel of the endoscope catheter, the flushing, brushing and suction are combined efficiently, and the waste is completely removed.

[0125] The scheme of the embodiment makes the endoscope system be affected by the pressure of the flushing liquid in use, the coating body head 21 can reciprocate axially in the area of the endoscope catheter head 11, in the case that the endoscope catheter 1 does not move, the flushing and brushing actions can act on the in-vivo tissue at different spatial positions, and the waste being sucked through the opening 101 in the working channel of the endoscope catheter can be observed, so that the movement degree of the coating body head 21 is further adjusted, and more dynamic and accurate flushing, brushing and suction operations are realized.

[0126] The inflation of the coating body inflatable part 22 described in the application refers to the inflation of the dynamic interlayer 200, the increase of the internal pressure of the dynamic interlayer 200 causes the coating body thin-walled inflatable part 22 to expand outward, the volume is increased, the internal space of the dynamic interlayer 200 is also increased synchronously with the inflation of the coating body inflatable part 22, and the inflation of the coating body inflatable part 22 and the inflation of the dynamic interlayer 200 are the same concept; the coating body head part refers to an independently formed part as the coating body head 21, the connection between various forms of the coating body head part and the area of the endoscope catheter head 11 can be threaded connection, specifically, the coating body head part is provided with internal thread lines, and is installed on the corresponding threaded matching structure of the endoscope catheter head 11 area by rotation; the coating body head part can also be connected to the endoscope catheter head 11 area through a detachable buckle; the coating body head 21 can be integrally formed with the coating body inflatable part 22 as one part; the coating body head 21, the coating body inflatable part 22 and the coating body sleeve joint part 23 can also be integrally formed as one part; in addition to the brush-shaped protrusions, the coating body inflatable part 22 can also be made of multiple protrusions, particles, spines and other structures that can play a role in stripping the waste adhering to the body tissue (not shown in the figure).

[0127] The position of each pipe body and part in the application is described as follows: the head is towards the distal end, which is used to enter the body in use; the tail is towards the proximal end, which is at least partially located outside the body in use; the internal opening is the distal end opening, and the external opening is the proximal end opening; the “forward” is towards the distal end, and the “backward” is towards the proximal end.

[0128] The medical endoscope of the present application can simplify the operation steps, reduce tissue damage, greatly save operation time and reduce treatment cost, and can be used for endoscopic medical operation in various natural cavities including cardiovascular system, respiratory tract, tear duct, ear canal, reproductive tract, digestive tract and the like, or in the third space of the chest cavity, abdominal cavity and the like of living body, and can also be used for medical operation in wound channel of penetrating wound, pathological sinus tract and the like, and can be specifically made into gastroscope, duodenoscope, bronchoscope, nasopharyngolaryngoscope, ureteroscope, cystoscope, hysteroscope, colposcope, arthroscope and the like.

Claims

1. A combined jet and endoscope medical endoscope, the head (11) region of the endoscope catheter (1) is provided with a viewing assembly (112), the endoscope catheter (1) is provided with a working channel (10) penetrating the head and tail, the working channel (10) is provided with a working channel inner opening (101) entering the body during use and a working channel outer opening (102) in the extracorporeal part, the top end (111) of the endoscope catheter (1) can be stretched out of the sheath inner opening (301) of the sheath tube (3) matched with the endoscope catheter (1) during use, characterized in that: The invention also includes a hollow covering body (2), the covering body (2) is composed of a covering body head (21), a covering body expandable portion (22), and a covering body sleeve portion (23), the covering body (2) is sleeved on the outside of the endoscope catheter (1) and wraps at least a part of the area of ​​the endoscope catheter (1), the gap between the outer surface of the endoscope catheter (1) and the covering body expandable portion (22) is a dynamic interlayer (200), and the gap between the sheath (3) and the outer surface of the endoscope catheter (1) is a static interlayer (300), when in use, the external liquid entering the static interlayer (300) first enters the dynamic interlayer (200) through the dynamic interlayer liquid inlet (202) directly formed by or participated in the formation of the covering body sleeve portion (23), and then flows out through the dynamic interlayer liquid outlet (201). The flushing liquid (D) and waste materials (P) after flushing the tissue in the body are sucked into the working channel (10) through the inner opening (101) of the working channel of the endoscope catheter, and then discharged to the outside of the body through the outer opening (102) of the working channel.

2. The flush-and-suction integrated medical endoscope according to claim 1, characterized by: The preset total area of ​​the dynamic interlayer liquid inlet (202) is greater than the preset total area of ​​the dynamic interlayer liquid outlet (201) before the expandable portion (22) of the covering body is deformed and expanded.

3. The integrated suction and irrigation medical endoscope of claim 1, wherein: The covering head (21) can be slidably sleeved on the outside of the endoscope catheter (1). When the endoscope catheter (1) is stationary, the covering head (21) can be displaced axially along the endoscope catheter (1) under the drive of the flushing liquid (D).

4. The integrated suction and irrigation medical endoscope of claim 1, wherein: The outer surface and / or inner surface of the expandable portion (22) of the covering body is provided with a hydrophilic coating with a lubricating effect.

5. The integrated suction and irrigation medical endoscope of claim 1, wherein: The endoscope catheter (1) is provided with a connection structure with the covering body (2), which includes one or more of the following methods: a discontinuous or continuous groove (121) on the outer surface of the middle part (12) of the endoscope catheter, an annular depression (114) or a partial depression of the endoscope catheter head (11), an external thread of the endoscope catheter head (11), an assembly section (115) with a slightly reduced outer diameter of the circumference downward from the top end (111) of the endoscope catheter head, and a discontinuous or continuous barrier (117) distributed in an annular manner below the top end (111) of the endoscope catheter head.

6. The integrated suction and irrigation medical endoscope of claim 1, wherein: The covering body head (21) and the covering body expandable portion (22) of the covering body (2) are an integrally formed component; or the covering body head (21) and the covering body expandable portion (22) of the covering body (2) are each independently formed components, and the two are then tightly connected into one.

7. The integrated suction and irrigation medical endoscope of claim 1, wherein: The covering body sleeve portion (23) is provided with one or more of the following structures: a ring-shaped inward protruding rib (231), a thin-walled portion (232) for connecting with the covering body expandable portion (22), a notch that becomes a dynamic interlayer liquid inlet (202) after being fitted with the endoscope catheter (1), and a through hole that directly becomes a dynamic interlayer liquid inlet (202) without fitting with the endoscope catheter (1).

8. The integrated suction and irrigation medical endoscope of claim 1, wherein: The tail part (33) of the sheath is provided with a ring-shaped elastic sealing body (S1), which is in interference contact with the outer surface of the endoscope catheter (1) in relative motion, so as to seal the static interlayer (300) from external liquid; or the inner surface of the sheath (3) in the local area of the tail part (33) is closely combined with the outer surface of the endoscope catheter (1), so that the endoscope catheter (1) and the sheath (3) can move relative to each other while being sealed from external liquid.

9. The integrated suction and irrigation medical endoscope of claim 1, wherein: The expandable part (22) of the sheath has one or more of the following structures and forms: uneven wall thickness, phased difference in wall thickness, intermittent or continuous thread line distribution, inwardly protruding and / or outwardly protruding protruding ribs, and corrugated undulations.

10. The integrated suction and irrigation medical endoscope of claim 1, wherein: The endoscope catheter (1) is further provided with a protruding suction body and / or a protruding sealing body arranged in the top end (111) area of the head part or the head part (21) of the sheath, which is straight or curved.

11. The integrated suction and irrigation medical endoscope of claim 1, wherein: The head part (21) and / or the expandable part (22) of the sheath is provided with one or more structures of brush-like protrusions, bumps, particles, and spines.

12. The integrated suction and irrigation medical endoscope of claim 1, wherein: The dynamic interlayer outlet (201) is arranged in the expandable part (22) and / or the head part (21) of the sheath; the head part (21) is directly provided with the dynamic interlayer outlet (201) and / or forms the dynamic interlayer outlet (201) by being combined with the outer surface of the endoscope catheter head (11) through the inward notch (2180) of the annular head part component (21c).

13. The integrated suction and irrigation medical endoscope of claim 1, wherein: The head part (21) of the sheath is provided with a tubular embedded segment (211) which can be embedded into the inner opening (101) of the working channel of the endoscope catheter, and the tubular embedded segment (211) is used for fixing the head part (21) of the sheath.

14. The integrated suction and irrigation medical endoscope of claim 1, wherein: The head part (21) of the sheath is provided with a tubular embedded segment (211) which can be embedded into the inner opening (101) of the working channel of the endoscope catheter, and the distal end of the tubular embedded segment (211) is further provided with a hollow root segment (215), which forms a top end gap (203) of the endoscope catheter head (11) after assembly.

15. A sheath (2) for fitting over an endoscope catheter (1), characterized in that: The sheath (2) is composed of a head part (21), an expandable part (22), and a sleeve joint part (23), and is sleeved on at least part of the head part (11) of the endoscope catheter (1). After the sheath (2) is sleeved, the inner opening (101) of the working channel of the endoscope catheter (1) and the exploring assembly (112) can still play corresponding roles, and a dynamic interlayer (200) is formed between the outer surface of the endoscope catheter (1) and the expandable part (22) of the sheath. During use, the flushing liquid (D) first enters the dynamic interlayer (200) and then flows out through the dynamic interlayer outlet (201). After flushing the body tissue, the flushing liquid (D) and the waste materials (P) are sucked into the working channel (10) through the inner opening (101) of the working channel of the endoscope catheter, and then discharged to the outside of the body through the outer opening (102) of the working channel.

16. A combined irrigation and aspiration medical endoscope, the endoscope catheter (1) being provided with a head (11) region in which a viewing assembly (112) is located, the endoscope catheter (1) being provided with a working channel (10) extending through the head and tail, the working channel (10) being provided with an internal opening (101) into the body when in use and an external opening (102) outside the body, characterised in that: The application also comprises a hollow covering body (2) which is composed of a covering head (21), an expandable covering body (22) and a covering sleeve (23). The covering body (2) is sleeved on the endoscope catheter (1) and covers at least a part of the endoscope catheter head (11). The gap between the outer surface of the endoscope catheter (1) and the expandable covering body (22) is a dynamic interlayer (200). The endoscope catheter (1) is also provided with an external liquid inlet channel (100) which is in communication with the dynamic interlayer (200). During use, the flushing liquid (D) enters the dynamic interlayer (200) through the liquid inlet channel (100) and then flows out from the dynamic interlayer outlet (201). The flushing liquid (D) and the waste material (P) after flushing the body tissue are sucked into the working channel (10) through the working channel inner opening (101) and then discharged to the outside of the body through the working channel outer opening (102).

17. The combined suction and irrigation medical endoscope according to claim 16, wherein: The covering head (21) is slidably sleeved on the endoscope catheter (1). When the endoscope catheter (1) is static, the covering head (21) can be axially displaced along the endoscope catheter (1) under the driving of the flushing liquid (D).

18. The combined suction and irrigation medical endoscope according to claim 16, wherein: The covering sleeve (23) and / or the covering head (21) and the endoscope catheter (1) are connected in a detachable manner.

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