Dilation-suction integrated medical endoscope catheter

Abstract

The application discloses a medical endoscope catheter with expansion and suction functions. The endoscope catheter is provided with a working channel penetrating the head and tail of the endoscope catheter. A sheet-shaped isolation body divides the internal space of the working channel into an upper cavity of the isolation body and a lower cavity of the isolation body. A central hole for passing an optical fiber or a guide wire is arranged in the central region of the isolation body. A plurality of intercepting holes are arranged outside the central hole. A peeping assembly accommodating hole is arranged in the edge region of the isolation body. The peeping assembly is embedded in the accommodating hole or moves up and down along the accommodating hole. The endoscope catheter is further provided with a head capsule. The head capsule is sealingly connected to the outer surface of the endoscope catheter through a head capsule sealing portion. The free portion of the head capsule and the outer surface of the endoscope catheter covered by the free portion of the head capsule jointly form a head capsule internal cavity. A first fluid passage is arranged on the endoscope catheter. During use, fluid is injected through the external opening of the first fluid passage. The fluid enters the head capsule internal cavity through the internal opening of the first fluid passage, and drives the free portion of the head capsule to expand and deform.

Description

Technical Field

[0001] This invention relates to an integrated expansion and suction medical endoscope catheter, belonging to the field of medical device product technology. Background Technology

[0002] Existing medical endoscopic catheters are used to enter natural body cavities or pathological sinuses for procedures such as biopsies, tissue ablation, electrocautery, and laser lithotripsy. When encountering narrow natural cavities, the rigid tip of the catheter radially expands the cavity, inevitably damaging the mucosal tissue. Furthermore, waste materials such as secretions, blood clots, and stone fragments adhere to the mucosal surface and are difficult to remove. Some of these waste materials are even located in blind cavities such as the sinuses, appendix, and renal calyces. Removing these waste materials usually requires irrigation fluid combined with negative pressure suction, which is inflexible and covers a small area. This is particularly problematic in cases such as urinary tract stone surgery. During treatment, the recurrence rate of kidney stones is relatively high. One major reason for this high recurrence rate is that the stones are not completely removed during treatment. Many stone fragments smaller than 3mm remain in the patient's body. Currently, using negative pressure technology to suction small stone fragments or even stone powder out of the body is time-consuming and laborious. In addition, the surgical field of vision is poor, the operation frequency is extremely high, the operation is difficult and the efficiency is low. The overall process of laser lithotripsy is time-consuming and it is difficult to completely avoid the high temperature and high pressure damage to the urinary system during the lithotripsy process. Small stone fragments can also easily block the working channel of the endoscopic catheter, which can even lead to life-threatening situations in severe cases. Summary of the Invention

[0003] To avoid damaging mucosal tissue with medical endoscopic catheters and to ensure thorough cleaning of waste materials during endoscopic surgery by performing simultaneous flushing and suction under visualization, this invention provides an integrated expansion and suction medical endoscopic catheter. It can be safely inserted into the operating area through flexible expansion, and ensures unobstructed discharge of waste materials during flushing and suction under visualization.

[0004] This invention is implemented as follows:

[0005] This is an integrated dilatation and suction medical endoscope catheter. The catheter has a working channel extending from head to tail, with an internal opening for insertion into the body and at least one external opening located outside the body. A thin, sheet-like isolator divides the internal space of the working channel into an upper and lower cavity. The central region of the isolator has a central aperture for an optical fiber or guidewire to pass through, surrounded by multiple interception apertures. The edge region of the isolator has a probe assembly receiving aperture, in which the probe assembly is embedded or moves vertically along the aperture. It also includes a head capsule located at... The endoscope catheter tip is located near the top of the head. The head capsule is sealed to the outer surface of the endoscope catheter through a head capsule sealing part. The free part of the head capsule and the outer surface of the endoscope catheter covered by it together form the inner cavity of the head capsule. The endoscope catheter is provided with a first fluid passage. The first fluid passage has an inner opening that communicates with the inner cavity of the head capsule and an outer opening that communicates with external fluid. In use, fluid is injected through the outer opening of the first fluid passage located outside the body. The fluid enters the inner cavity of the head capsule through the inner opening of the first fluid passage, driving the free part of the head capsule to expand and deform.

[0006] Preferably, the separator is transparent.

[0007] A specific structure of the head capsule, wherein the free part of the head capsule has multiple outward fluid outlets on one side near the tip of the endoscope catheter.

[0008] To facilitate the flow of water into the upper cavity of the isolator, at least one inward-facing outlet is provided on the inner surface of the endoscopic catheter wall, which is covered by the free part of the head capsule.

[0009] To facilitate flushing, a second fluid passage is provided inside the endoscopic catheter wall, with the opening of the second fluid passage located at the tip of the endoscopic catheter.

[0010] To facilitate the up-and-down movement of the probing component for visualization of the operation, the probing component is connected to a non-fixed tubing that is either fixed in position or movable. The probing component is located at the distal end of the tubing, which is situated within a tubing channel inside the endoscopic catheter wall. The probing component extends from an opening in the tubing channel located at the bottom of the lower cavity of the isolator. The opening of the tubing channel is located on the endoscopic catheter operating handle, with a portion of the tubing located outside the opening of the tubing channel.

[0011] A positional relationship between the viewing component and the receiving hole, wherein the viewing component is embedded in the receiving hole but is not constrained by the receiving hole, and the viewing component can pass through the receiving hole to enter the upper cavity of the isolator or retract into the lower cavity of the isolator.

[0012] The specific structure of the isolator includes multiple slotted interception holes, which are radially distributed with the central hole as the origin. At least one slotted interception hole allows optical fibers to pass through.

[0013] To facilitate the guidance of optical fibers into the central hole or interception hole of the isolator, the isolator is funnel-shaped protruding into the lower cavity of the isolator or conical convex into the upper cavity of the isolator.

[0014] To allow the viewing component to pass freely through the receiving hole, at least the receiving hole area of ​​the isolator is flexible.

[0015] Preferably, at least one of the inner and outer surfaces of the endoscopic catheter is coated with a hydrophilic coating. After the hydrophilic coating is hydrated, it can significantly reduce the friction generated when the endoscopic catheter comes into contact with the mucosal tissue, thereby reducing mucosal damage.

[0016] The beneficial effects of this invention are:

[0017] 1. The working channel of the endoscopic catheter is connected to negative pressure, and water flows into the upper cavity of the isolator to continuously discharge waste materials to the outside of the body through the working channel. This improves efficiency and eliminates the risk of high temperature damage during surgery, integrating flushing, suction, isolation and removal of waste materials into a complete system solution.

[0018] 2. When this solution is applied to the field of laser lithotripsy of the urinary system, compared with traditional lithotripsy systems where a certain gap (generally 0.5-0.75mm) needs to be maintained between the endoscopic catheter and sheath to allow cooling and flushing water to carry stone fragments out of the body, this results in the need to use a larger diameter sheath or a smaller diameter endoscopic catheter. This increases the risk of damage to the human mucosa during insertion or reduces the cross-sectional area of ​​the endoscopic catheter's working channel. In this invention, the gap between the endoscopic catheter and sheath (the endoscope-sheath gap) is used to deliver water, while the working channel of the endoscopic catheter is used to aspirate the water and stone fragments out of the body. The endoscope-sheath gap only needs to be kept small, and the diameter of the endoscopic catheter's working channel is increased, further improving the stone removal efficiency.

[0019] 3. The head capsule can be filled with fluids such as liquids or gases. When the head capsule is filled with liquid, the free part of the head capsule deforms and expands, which can radially expand narrow natural cavities such as narrow urinary tracts, ureters, and renal calyxes. Compared with the radial rigid expansion during the axial advancement of traditional endoscopic catheters, the radial flexible expansion of the head capsule avoids shear damage to the mucosa of natural cavities. In addition, the increased pressure in the head capsule cavity will spray the liquid into the natural cavities through the outward liquid outlet, further expanding and lubricating the narrow parts of the natural cavities.

[0020] 4. After the free part of the head capsule is filled and expanded, it can seal the openings of natural cavities such as the sinus openings and renal calyx openings, preventing the irrigation fluid and harmful waste products from flowing out of the gaps between the head capsule and the natural cavity openings, thus eliminating or reducing the risk of waste products flowing out of the natural cavity openings and causing pollution and damage.

[0021] 5. The thin-film isolator divides the internal space of the endoscope catheter working channel into an upper isolator cavity and a lower isolator cavity. The isolator is also equipped with a central hole and an interception hole. The isolator blocks large-sized waste materials in the upper cavity, while smaller waste materials are carried out of the body by the water flow. This not only achieves high-efficiency flushing and suction functions, but also avoids clogging the endoscope catheter working channel, ensuring unobstructed operation. Different specifications of isolators can be configured, and the diameter of the central hole and interception hole on the isolator can be set according to actual needs to isolate waste materials of different sizes.

[0022] 6. The isolator in this solution is equipped with a viewing component receiving hole. The viewing component can be embedded in the receiving hole or move up and down through the receiving hole, realizing functions such as flushing and suction under direct visualization. Because the viewing component can move up and down through the receiving hole, when the viewing component is located in the lower cavity of the isolator, it can accurately guide the optical fiber or guide wire through the central hole or interception hole. When the viewing component is located in the area near the receiving hole, it can guide the upper cavity of the isolator to accurately contact the waste material for removal. When the viewing component is located in the area near the opening in the working channel, it can assist in observing the condition of the natural cavity.

[0023] 7. When treating ureteral stones, especially those that have fallen into the ureter within a week, the head of the cyst can be expanded to dilate the local ureter and relieve the stone from impaction. The working channel is opened to create negative pressure to adsorb the stone, and the stone can be removed from the ureter without the need for laser release. Attached Figure Description

[0024] The following figures are not limited to the present invention:

[0025] Figure 1A Example 1: Partial cross-sectional three-dimensional schematic diagram of the endoscopic catheter and its matching sheath.

[0026] Figure 1B Example 1 only shows a partial cross-sectional schematic diagram of the endoscopic catheter.

[0027] Figure 1C Example 1: A partial cross-sectional diagram of the head capsule before it expands.

[0028] Figure 1D Example 1: Schematic diagram of a partial cross-section of the head cystic mucosa.

[0029] Figure 1E Example 1: Schematic diagram of a partial cross-section of an optical fiber aligned with a kidney stone.

[0030] Figure 1F Example 1: A cross-sectional diagram showing the funnel-shaped insulator extending into the lower cavity of the insulator.

[0031] Figure 1G Example 1: A cross-sectional view of the isolator with a conical shape convex towards the upper cavity of the isolator.

[0032] Figure 2A Example 2: Schematic diagram of fiber optic alignment with a kidney stone

[0033] Figure 2B Example 2: Cross-sectional diagram of the broken stone

[0034] Figure 3A Example 3: Partial cross-sectional view of the viewing component located in the receiving hole.

[0035] Figure 3B Example 3: Partial cross-sectional schematic diagram of the probing component protruding from the opening in the working channel.

[0036] Figure 3C Example 3: A three-dimensional schematic diagram from one angle.

[0037] In the attached diagrams above, each arrow indicates the direction of water flow. Detailed Implementation

[0038] The embodiments of the present invention are not limited to those described below. The following embodiments are illustrated using urinary tract stone surgery as an example:

[0039] Example 1:

[0040] like Figure 1AAs shown, the dilatation and suction integrated medical endoscope catheter 1 has a long and thin endoscope catheter 1 with a working channel 10 extending from head to tail. The working channel 10 has an internal working channel opening 101 that enters the body during use and at least one external working channel opening 102 located outside the body. The internal working channel opening 101 is located at the top 111 of the endoscope catheter head. The long and thin endoscope catheter 1 includes a head 11, a middle part 12, and a tail 13. The tail 13 of the endoscope catheter is connected to a handle H for the user to operate and hold. The handle H is hollow inside and connected to the endoscope. The working channel 10 of the endoscope catheter 1 is continuous. The handle H is also provided with a working channel side branch H3 for guide wires or optical fibers to pass through and a handle side branch H2 for connecting a negative pressure suction device. The external opening 102 of the working channel is located on the handle side branch H2. The handle H is also provided with a regulating body H1 to adjust the degree and / or direction of bending of a part of the head 11 of the endoscope catheter 1. The working channel 10 of the endoscope catheter is used for the passage of medical instruments in use, providing guidance and protection for medical instruments such as various ablation catheters, guide wires, stone baskets, optical fibers, and ultrasound catheters located within it. Other corresponding functions; also includes a sheath 3 used in conjunction with the endoscope catheter 1. The sheath 3 is fitted over the endoscope catheter 1 during use. The hollow sheath 3 has an inner lumen (not shown in the figure). The elongated sheath 3 includes a sheath head 31, a middle portion 32, and a tail portion 33. The sheath 3 has an inner opening 301 for entering the body during use and an outer opening 302 located outside the body. When the endoscope catheter 1 and the sheath 3 are used together, the tip 111 of the endoscope catheter head passes through the inner lumen of the sheath and exits through the inner opening 301. In this embodiment... The tail end 33 of the sheath is also connected to a Y-shaped sheath connector 3a. The sheath connector 3a is provided with a sheath side branch 34, which can be connected to the infusion device (figure omitted). When the sheath side branch 34 is connected to the infusion device, external fluid can enter the sheath lumen through the inner lumen of the sheath side branch, and then enter the human body through the gap between the endoscopic catheter and the sheath. During use, various treatment and diagnostic instruments, such as various ablation catheters, biopsy forceps, balloon catheters, laser fibers, etc., can be placed in the working channel of the endoscopic catheter. After completing the stage operation, the waste material at the treatment site usually needs to be removed.

[0041] like Figure 1A-1EAs shown, the expansion and suction integrated medical endoscope catheter 1 in this embodiment has a working channel 10 extending from head to tail. The working channel 10 has an internal opening 101 that enters the body during use and at least one external opening 102 located outside the body. A thin-film-shaped isolator 2 divides the internal space of the working channel 10 into an upper isolator cavity 1001 and a lower isolator cavity 1002. The central region of the isolator 2 has a central hole 200 for an optical fiber L or guide wire to pass through. The outer part is provided with multiple interception holes 201. The edge area of ​​the isolator 2 is provided with a receiving hole 202 for the probing component 112. The probing component 112 is embedded in the receiving hole 202 or moves up and down along the receiving hole 202. It also includes a head capsule 4, which is located in the area near the top 111 of the endoscope catheter head 11. The head capsule 4 is sealed to the outer surface of the endoscope catheter 1 through a head capsule sealing part 41. The free part 42 of the head capsule and the outer surface 1112 of the endoscope catheter 1 covered by it together form the inner cavity 4 of the head capsule. 0. The endoscopic catheter 1 is provided with a first fluid passage 16. The first fluid passage 16 has an inner opening 161 communicating with the inner cavity 40 of the head capsule and an outer opening 162 communicating with the external fluid. The handle H is also provided with a side branch H4 of the first fluid passage. The outer opening 162 communicating with the external fluid is located on the side branch H4. During use, fluid is injected through the outer opening 162 of the first fluid passage located outside the body. The fluid enters the inner cavity 40 of the head capsule through the inner opening 161 of the first fluid passage, driving the free part 42 of the head capsule to expand and deform. In this embodiment, negative pressure is connected in the working channel of the endoscopic catheter. Cooling and flushing water is injected into the gap between the endoscopic catheter 1 and the sheath 3. After the water enters the human body, it enters the upper cavity of the isolator to continuously draw the heat generated by the laser and the stone fragments out of the body through the working channel, which improves the stone removal efficiency and eliminates the risk of high temperature damage during surgery. Compared with the traditional stone removal and lithotripsy system, the endoscopic catheter and sheath need to leave a certain gap (generally 0.5-0.5).The 75mm diameter of the endoscope sheath is used to facilitate the removal of stone fragments by cooling and flushing water. This necessitates either a larger diameter sheath or a smaller diameter endoscopic catheter, increasing the risk of damage to the mucous membranes during insertion or reducing the cross-sectional area of ​​the endoscopic catheter's working channel. This embodiment utilizes the gap between the endoscopic catheter and sheath (the sheath gap) to deliver water, while the working channel of the endoscopic catheter is used to aspirate the water and stone fragments out of the body. This allows for a smaller sheath gap and a larger working channel diameter, further improving the cleaning effect. For improved efficiency, the head capsule 4 is preferably made of a compliant flexible material such as silicone rubber, latex, or thermoplastic elastomer (non-compliant or semi-compliant materials can also be used). Furthermore, a hydrophilic coating can be added to the head capsule 4, the outer surface of the endoscopic catheter, and the outer surface of the sheath. This coating can be made of hydrophilic polymers such as polyvinylpyrrolidone, polyacrylamide, polyethylene glycol, or polyvinyl alcohol. A composite antibacterial agent can also be added to the coating to significantly improve its lubrication performance, reduce contact resistance, and further reduce mechanical damage to the mucosa and other internal tissues during surgery.

[0042] In this embodiment, the probing component 112 is connected to a non-fixed tubing 1121 that is either fixed in position or movable. The probing component 112 is located at the distal end 1121A of the tubing, which is partially enlarged. The tubing is located within the tubing channel 113 inside the wall of the endoscope catheter 1. The probing component 112 extends from the opening 1131 of the tubing channel located at the bottom of the lower cavity 1002 of the isolator. The external opening 1132 of the tubing channel is located on the operating handle H of the endoscope catheter 1. Part of the tubing 1121 is located outside the external opening 1132 of the tubing channel. Specifically, the tubing channel is the endoscope catheter. The working channel contains a hollow tube, or the tube channel can also be a hollow tube protruding into the working channel or the gap between the endoscope sheath and the endoscopic catheter wall. The probing component 112 and the receiving hole 202 have a positional relationship where the probing component 112 is embedded in the receiving hole 202 but not constrained by it. The probing component 112 can pass through the receiving hole 202 into the upper cavity 1001 of the isolator or retract into the lower cavity 1002 of the isolator. If there is a gap between the probing component 112 and the receiving hole 202, or if at least the receiving hole 202 area of ​​the isolator 2 is flexible, even if the probing component 112 and the receiving hole 202 are not completely confined, the probing component 112 can still pass through the receiving hole 202 into the upper cavity 1001 or retract into the lower cavity 1002 of the isolator. The two apertures 202 are in interference contact without gaps, and the flexible receiving aperture 202 also allows the probe component 112 to pass freely. Compared with the traditional probe component located near the tip 111 of the endoscope catheter, the isolator in this solution has a probe component receiving aperture. The probe component can be embedded in the receiving aperture or move up and down through the receiving aperture, realizing functions such as lithotripsy, lithotripsy collection, and lithotripsy suction under visualization. When the probe component is located in the lower cavity of the isolator, it can accurately guide the optical fiber through the central aperture or interceptor aperture. When the probe component is located in the area near the receiving aperture, it can guide the upper cavity of the isolator to make precise contact. The endoscopic catheter is used to facilitate lithotripsy and stone collection. When the endoscopic device is located near the opening of the working channel, it can help observe the condition of stones in the natural cavities and renal calyces and pelvis. In this embodiment, negative pressure can be used to adsorb the original stone through the opening of the working channel of the endoscopic catheter and move it to a position that is conducive to laser lithotripsy, such as moving the stone from the lower calyx of the kidney to the upper calyx of the kidney. This reduces the dependence on the operating space during lithotripsy and replaces the traditional stone basket. Larger stone fragments generated during laser lithotripsy can be retained in the upper cavity of the isolator and quickly moved out of the body in one go, which greatly saves surgical time.

[0043] In this embodiment, the isolator 2 is provided with multiple slotted interception holes 201. The slotted interception holes 201 are radially distributed with the central hole 200 as the origin. At least one slotted interception hole 201 allows the optical fiber L to pass through. Preferably, the isolator 2 is transparent; that is, the optical fiber L can pass through both the central hole 200 and the slotted interception holes 201, so as to perform laser lithotripsy more accurately. The slotted interception holes 201 are radially distributed, and the cross-sectional area of ​​each slotted interception hole is smaller than the cross-sectional area of ​​the opening inside the working channel of the endoscope catheter. Stone debris and other debris passing through the slotted interception holes will not block the working channel of the endoscope catheter. The system acts as a channel, allowing stones trapped in the upper cavity of the negative pressure basket to exit the body along with the basket. The isolator can be configured in different sizes, with the central hole and interception hole on the isolator having different diameters depending on actual needs. This allows for the isolation of stone fragments of varying sizes. For example, a large-diameter endoscopic catheter can be equipped with an isolator with a slightly larger interception hole. The isolator blocks larger stones in its upper cavity, while smaller stone fragments are carried out of the body by the water flow. This achieves efficient flushing and stone aspiration while preventing large stones from clogging the endoscopic catheter's working channel, ensuring unobstructed stone removal.

[0044] like Figure 1C As shown, when the integrated dilation and suction medical endoscope catheter 1 travels through a natural cavity and reaches a narrow point or a place where the catheter is difficult to travel, if it is directly forced forward through the natural cavity, such as the narrow point U0 of the ureter U, it will inevitably cause shear damage to the mucosa of the natural cavity tissue. In this figure, a stone S is embedded in the inner surface U1 of the mucosa tissue at the narrow point U0 of the ureter U. The opening 101 of the working channel of the endoscope catheter is still a certain distance away from the stone S. At this time, fluid is injected from outside the body through the first fluid passage 16 and the opening 161 of the first fluid passage into the head capsule. The cavity 40, with its expandable head capsule free portion 42, deforms and expands outward, radially widening narrow natural cavities such as the urethra, ureter, and renal calyx. Because the inner surface U1 of the expanded mucosa cannot quickly return to its original state, this allows the endoscopic catheter to advance close to the stone S. Compared to the rigid expansion during the axial movement of traditional endoscopic catheters, the radial flexible expansion of the head capsule 4 avoids shear damage to the mucosa of natural cavities during catheter advancement. The fluid injected into the head capsule cavity can be either liquid or gas; for example... Figure 1D As shown, fluid enters the cavity of the head capsule, expanding and deforming the free portion 42 of the head capsule, which then flexibly dilates the narrowed section U0 of the ureter. At this time, the specific location of the stone can be observed with the help of the probing component 112 at the receiving port, guiding the opening of the endoscopic catheter working channel to approach or adhere tightly to the stone S; as Figure 1EAs shown, after the head capsule's free portion radially and flexibly dilates the ureter U, the inner surface of the mucosal tissue U1 does not tightly encapsulate the stone S. The optical fiber L penetrates from the lower cavity 1002 of the isolator 2 through the central hole 200 into the upper cavity 1001 of the isolator until it approaches or touches the stone S, releasing energy to break the stone into fragments or powder. Smaller stone powder enters the lower cavity 1002 of the isolator through the grooved interception hole 201 with the water flow, while larger stone fragments are blocked by the isolator in the upper cavity 1001. 001, which can be withdrawn from the body along with the endoscopic catheter, at which point the water flow delivered through the gap between the endoscopic catheter and the sheath is continuously drawn into the upper cavity of the isolator due to negative pressure. Small stone fragments or even stone powder, as well as the heat energy generated by the laser, are continuously discharged to the outside of the body through the working channel 10 of the endoscopic catheter. This integrates laser lithotripsy, flushing, aspiration, and stone removal into a complete system, greatly improving lithotripsy efficiency while ensuring that there is no high-temperature water flow in contact with the urinary tract mucosa throughout the process, completely eliminating the risk of high-temperature damage during surgery.

[0045] like Figure 1F , 1G As shown, the isolator 2 is funnel-shaped and extends into the lower cavity 1002 of the isolator, or the isolator 2 is cone-shaped and convex into the upper cavity 1001 of the isolator; Figure 1F The isolator 2 is funnel-shaped and extends into the lower cavity 1002 of the isolator, which facilitates the guidance of the optical fiber L into the slot-shaped interception hole 201 and causes the optical fiber L to be deflected and protrude from the opening 101 in the working channel, making it easier to reach the stone S in the side position. At the same time, it also increases the volume of the upper cavity 1001 of the isolator to accommodate more stone fragments and improve the one-time removal efficiency. Figure 1G The structure of the isolator 2 is shown to be conical and convex toward the upper cavity 1001, which makes it easy for the guide fiber L to accurately pass through the central hole 200.

[0046] This invention covers medical endoscopes, both rigid and flexible, and the probing components refer to one or more of the following: electronic or optical endoscope components, pressure sensors, temperature sensors, body fluid conductivity sensors, pH sensors, and ultrasonic probes.

[0047] Example 2:

[0048] like Figure 2A , 2BAs shown, the difference from Embodiment 1 is that the free part of the head capsule has multiple outward-facing fluid outlets 401 on one side near the tip of the endoscope catheter. The inner cavity 40 of the head capsule is connected to the outside through the multiple outward-facing fluid outlets 401, that is, fluid can flow out into the natural cavity through the outward-facing fluid outlets 401. At this time, the increased pressure in the inner cavity of the head capsule will spray the fluid into the natural cavity through the outward-facing fluid outlets 401, further expanding and lubricating the narrow parts of the natural cavity. The flushing liquid and flushing material are sucked into the working channel 10 through the inner opening of the working channel of the endoscope catheter 1, and then discharged to the outside through the outer opening of the working channel. When in use, a negative pressure pipeline and related negative pressure suction device need to be connected to the outer opening of the working channel (figure not shown); Figure 2A As shown, when the dilatation-suction integrated medical endoscope catheter travels within a natural cavity (such as the ureter U) to a narrow point, fluid is injected from outside through the first fluid passage 16 and the opening 161 of the first fluid passage into the inner cavity 40 of the head capsule. The free portion 42 of the expandable head capsule deforms and expands outward, radially dilating the narrowed ureter. At this time, the opening of the working channel of the endoscope catheter is pressed tightly against the stone S, and the laser fiber L is aligned with the stone; Figure 2B As shown, the original stone in the ureter U is broken into stone fragments and powder by the energy released by the optical fiber. The slightly larger stone fragments S1 are blocked in the upper cavity 1001 of the isolator 2, while the smaller stone powder S2 is carried to the lower cavity 1002 of the isolator by the flushing fluid through the interception hole 201. The fluid, carrying the heat energy generated by the laser and the stone powder S2, is continuously discharged to the outside through the working channel 10 of the endoscopic catheter. When the tip of the endoscopic catheter enters the renal calyx, the free part of the head capsule expands and can block the opening of the renal calyx. During the flushing of the outward-facing fluid outlet and the negative pressure suction of the working channel, the many stone fragments in the renal calyx are difficult to escape from the blocked renal calyx opening to other areas of the renal pelvis, thus achieving thorough cleaning of stone fragments under visual guidance and eliminating the risk of stone fragment residue.

[0049] In this embodiment, at least one inward-facing liquid outlet 402 is provided on the inner surface 1111 of the endoscope catheter 1, which is covered by the head capsule free part 42. The first fluid passage 16 is connected to the endoscope catheter working channel 10 through multiple inward-facing liquid outlets. When liquid is injected into the first fluid passage, the liquid can be ejected from the inward-facing liquid outlet 402 and impact the opening 101 area inside the working channel, avoiding large stones, inflammatory secretions, etc. from blocking the opening 101 inside the working channel. It can also help increase the flow rate of irrigation water in the working channel 10 to improve flushing and cooling efficiency.

[0050] The head capsule cavity can be filled with fluids such as irrigation fluid, lubricants such as lubricants, and agents such as alfuzosin to increase the extensibility of the ureter. When filled with fluids such as irrigation fluid, it can expand the free part of the head capsule, irrigate and lubricate the natural cavities, and cool down during laser lithotripsy. When filled with lubricants such as lubricants, the lubricant flows out through the outward outlet on the expanded free part of the head capsule, which can lubricate the natural cavities, making it easier for the endoscopic catheter to pass through narrow areas and minimizing damage to tissues and mucous membranes. When filled with agents such as alfuzosin, it can relax smooth muscles, increase the extensibility of the ureter and other natural cavities, and facilitate the insertion of endoscopic catheters, sheaths, etc.

[0051] Example 3:

[0052] like Figures 3A-3C As shown, unlike the above embodiments, the endoscopic catheter 1 has a second fluid passage 15 inside its wall, and the opening 150 of the second fluid passage is located at the top 111 of the endoscopic catheter head. In this embodiment, as shown in Embodiment 1, cooling and flushing water can be injected into the gap (sheath gap) between the endoscopic catheter 1 and the sheath 3. After the water enters the human body, it enters the upper cavity of the isolator to continuously draw the heat generated by the laser and stone fragments out of the body through the working channel. Alternatively, only the second fluid passage 15 can be used to deliver cooling and flushing water, or the sheath gap and the second fluid passage can be used together to deliver liquid. When only the second fluid passage is used to deliver cooling and flushing water, the gap between the endoscopic catheter and the sheath is not used to deliver liquid. The sheath is only a sleeve outside the endoscopic catheter to assist the endoscopic catheter in smoothly entering the natural cavity. Of course, the sheath can also be used without the endoscopic catheter to complete the corresponding work. The working channel diameter of the endoscopic catheter is increased accordingly to further realize a large flow of stone suction channel, improve stone removal efficiency, and shorten operation time.

[0053] In this embodiment, the endoscope catheter 1 is provided with multiple second fluid passages 15 inside the tube wall. The second fluid passage opening 150 corresponding to each second fluid passage 15 is respectively opened at the top end 111 of the endoscope catheter head. It also includes a second fluid passage side branch H5 connected to the second fluid passage 15. The second fluid passage external opening 151 is located on the second fluid passage side branch H5. External water flows through the second fluid passage side branch H5 into multiple fluid passages 15 and then enters the human body through the second fluid passage internal opening 150. Finally, the water carrying stone fragments enters the upper cavity 1001 and lower cavity 1002 of the isolator through the working channel internal opening 101 due to negative pressure suction and is discharged from the body. The second fluid passage internal opening 150 and / or the inward liquid outlet 402 on the inner surface of the endoscope catheter wall can be opened upward on the inner surface of the endoscope catheter wall or inward at the top end of the endoscope catheter head. This structure can make the water flow direction be towards or closer to the stone fragmentation position of the laser fiber L, improving the cooling and flushing efficiency of the water flow. Figure 3A The diagram shows fluid injected into the inner cavity 40 of the head capsule, the free portion 42 of the head capsule expanding and deforming, the optical fiber L passing through the central hole 200 into the upper cavity 1001 of the isolator, and the probing assembly located at the receiving hole 202. Figure 3B The diagram shows fluid injected into the head capsule cavity 40, fiber L passing through the central hole 200 into the upper cavity 1001 of the isolator, and the probing assembly passing through the receiving hole 202 and extending through the upper cavity 1001 of the isolator to the opening 101 inside the working channel of the endoscope catheter. Figure 3C This is a three-dimensional schematic diagram showing another angle of the free portion 42 of the head capsule after it has expanded and deformed.

[0054] The expansion and suction integrated medical endoscope catheter of this invention can be used in endoscopic medical operations in various natural cavities, including the cardiovascular, respiratory, lacrimal, ear, reproductive, and digestive tracts, or in the third space of the body, such as the thoracic and abdominal cavities. It can also be used for medical operations such as opening wound tracts and pathological sinus tracts, and for clearing gallstones or other stones, blood clots, secretions, and pathological tissues from natural cavities. Specifically, it can be made into gastroscopes, duodenoscopes, bronchoscopes, nasopharyngoscopes, ureteroscopes, cystoscopes, hysteroscopes, colposcopes, arthroscopes, etc.

[0055] In this invention, the positions of various tubes and components are described as follows: the head is the distal end, which is at least partially inserted into the body during use; the tail is the proximal end, which is at least partially located outside the body during use; the inner opening is the distal opening, and the outer opening is the proximal opening; "forward" means towards the distal end, and "backward" means towards the proximal end; "upper side" means the direction close to the head, and "lower side" means the direction close to the tail.

Claims

1. An integrated dilatation and suction medical endoscope catheter, wherein the endoscope catheter (1) is provided with a working channel (10) extending from head to tail, the working channel (10) having an internal opening (101) for entering the body during use and at least one external opening (102) located outside the body, and a thin-sheet-shaped isolator (2) dividing the internal space of the working channel (10) into an upper isolator cavity (1001) and a lower isolator cavity (1002), characterized in that: The isolator (2) has a central hole (200) in its central region for an optical fiber (L) or guide wire (G) to pass through. Multiple intercepting holes (201) are provided outside the central hole (200). The isolator (2) has a retrieval hole (202) for a probing component (112) in its edge region. The probing component (112) is embedded in the retrieval hole (202) or moves up and down along the retrieval hole (202). It also includes a head capsule (4), located near the tip (111) of the endoscope catheter head (11). The head capsule (4) is sealed to the outer surface of the endoscope catheter (1) through a head capsule sealing part (41). The free part of the head capsule (42) and the outer surface (1112) of the endoscope catheter (1) covered by it together constitute the inner cavity (40) of the head capsule. The endoscope catheter (1) is provided with a first fluid passage (16). The first fluid passage (16) is provided with an inner opening (161) communicating with the inner cavity (40) of the head capsule and an outer opening (162) communicating with the external fluid. When in use, fluid is injected through the outer opening (162) of the first fluid passage located outside the body. The fluid enters the inner cavity (40) of the head capsule through the inner opening (161) of the first fluid passage, driving the free part of the head capsule (42) to expand and deform.

2. The dilatation-suction integrated medical endoscopic catheter according to claim 1, characterized in that: The head capsule free part has multiple outward liquid outlets (401) on one side near the tip (111) of the endoscope catheter.

3. The dilatation-suction integrated medical endoscopic catheter according to claim 1, characterized in that: At least one inward-facing outlet (402) is provided on the inner surface (1111) of the endoscopic catheter (1) which is covered by the free part (42) of the head capsule.

4. The dilatation-suction integrated medical endoscopic catheter according to claim 1, characterized in that: The endoscope catheter (1) has a second fluid passage (15) inside its wall, and the opening (150) of the second fluid passage is located at the top of the endoscope catheter head (111).

5. The dilatation-suction integrated medical endoscopic catheter according to claim 1, characterized in that: The probing assembly (112) is connected to a fixed or movable non-fixed tubing (1121). The tubing (1121) is located in the tubing channel (113) inside the wall of the endoscope catheter (1). The probing assembly (112) extends from the opening (1131) of the tubing channel located at the bottom of the lower cavity (1002) of the isolator. The opening (1132) of the tubing channel is located on the operating handle (H) of the endoscope catheter (1). Part of the tubing (1121) is located outside the opening (1132) of the tubing channel.

6. The dilatation-suction integrated medical endoscopic catheter according to claim 1, characterized in that: The probing component (112) is located at the distal end (1121A) of the conduit. The distal end (1121A) of the conduit is embedded in the receiving hole (202) but is not constrained by the receiving hole (202). The probing component (112) can pass through the receiving hole (202) to enter the upper cavity (1001) of the isolator or retract into the lower cavity (1002) of the isolator.

7. The dilatation-suction integrated medical endoscopic catheter according to claim 1, characterized in that: The isolator (2) is provided with multiple slotted interception holes (201), which are radially distributed with the central hole (200) as the origin. At least one slotted interception hole (201) allows the optical fiber (L) to pass through.

8. The dilatation-suction integrated medical endoscopic catheter according to claim 1, characterized in that: The isolator (2) is funnel-shaped and extends into the lower cavity (1002) of the isolator, or the isolator (2) is cone-shaped and protrudes into the upper cavity (1001) of the isolator.

9. The dilatation-suction integrated medical endoscopic catheter according to claim 1, characterized in that: The area of ​​at least the accommodating hole (202) of the isolator (2) is flexible.

10. The dilatation-suction integrated medical endoscopic catheter according to claim 1, characterized in that: The isolator (2) is transparent.

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