Endoscope device with clip capsule

Abstract

Endoscope device with slit capsule, comprising at least one elongated endoscope catheter, the endoscope catheter comprising a working channel extending through the head and tail; the endoscope catheter further comprising a skirt body and an inflatable and deformable slit capsule, the skirt body being connected by skirt body diaphragms and a plurality of circumferentially distributed skirt body keels, the skirt body keels being composed of a connecting portion and a free portion, the slit capsule being at least partially located in a slit between the skirt body and the outer surface of the head of the endoscope catheter; the inner cavity of the slit capsule being in communication with the outside through a slit capsule passage; when pressure fluid enters the inner cavity of the slit capsule through the slit capsule passage from the outside, the slit capsule is forced to expand, the free portion of the skirt body keel is pushed to expand radially outward, and the natural cavity is expanded from inside to outside.

Description

Technical Field

[0001] This utility model relates to an endoscope device with a slit capsule, belonging to the technical field of medical device products. Background Technology

[0002] Existing medical endoscopes are divided into rigid endoscopes (thin and long, not easily bent), flexible endoscopes (easily bendable), and combination endoscopes (rigid endoscopes with a flexible endoscope inside a rigid endoscope). Rigid endoscopes are easier to insert into natural cavities or pathological sinuses due to their greater strength. While flexible endoscopes have the disadvantage of being difficult to insert, their thinner and more flexible design allows for longer contact with natural cavities during operation with less damage than rigid endoscopes. For example, in transurethral laser urolithotomy, the procedure typically involves: 1. Inserting a rigid endoscope into the bladder and ureter through the urethra; 2. Inserting a guidewire into the renal pelvis through the working channel of the rigid endoscope; 3. Withdrawing the rigid endoscope, leaving only the guidewire in the urinary tract; 4. Inserting the ureteral sheath and its core through the guidewire; 5. Removing the ureteral sheath. 6. Insert the flexible endoscope into the ureteral sheath; the working channel at the end of the flexible endoscope is used for fiber optic lithotripsy, cooling and flushing, and stone retrieval. Inserting the flexible endoscope requires multiple steps and is cumbersome. Moreover, regardless of whether it is a rigid or flexible endoscope, when it is axially advanced in the natural cavity of the body, the hard edge of the endoscope component head is in continuous dynamic contact with the mucosa of the natural cavity, and shearing damage is difficult to avoid. When encountering narrow parts of the natural cavity, this shearing damage is more serious, which not only obstructs the movement but also causes mucosal tearing. The existing endoscope insertion process has weak or no safety protection measures. After shearing damage to the mucosa of the natural cavity, it is easy to cause secondary infection and functional impairment. Summary of the Invention

[0003] This invention provides an endoscope device with a slit sac. When a gaseous or liquid pressurized fluid enters the cavity of the slit sac from outside the body through the slit sac passage, the free part of the slit sac deforms under force, and the radial expansion pushes the free part of the skirt-shaped keel to extend outward. The natural cavity is gently expanded from the inside out, thereby playing a series of comprehensive roles such as relieving stone impaction, eliminating obstruction to movement, isolating the mucosa, and guiding water flow.

[0004] The purpose of this utility model is achieved as follows:

[0005] An endoscope device with a slit capsule includes at least one elongated endoscope catheter, with an optical component at the tip of the endoscope catheter head, and the endoscope catheter has a working channel running through the head and tail, the working channel having an internal opening that enters the body in the use state and an external opening that is located outside the body in the use state.

[0006] The endoscopic catheter also includes a skirt-shaped body and an expandable and deformable slit sac. The skirt-shaped body is composed of a skirt-shaped membrane that can expand radially outward under force and multiple circumferentially distributed skirt-shaped keels connected together. The skirt-shaped keels are composed of connecting parts and free parts. The connecting parts of the skirt-shaped keels are connected to the outer surface of the endoscopic catheter head, and the distal end of the free part of the skirt-shaped keel extends beyond the tip of the endoscopic catheter head. The slit sac is at least partially located in the slit between the skirt-shaped body and the outer surface of the endoscopic catheter head. The inner cavity of the slit sac is connected to the outside through the slit sac passage. The inner opening of the slit sac passage is connected to the inner cavity of the slit sac, and the outer opening of the slit sac passage is located outside the body. When pressurized fluid enters the inner cavity of the slit sac from outside the body along the slit sac passage, the slit sac expands under force and pushes the free part of the skirt-shaped keel to expand radially outward, thus expanding the natural cavity from the inside out.

[0007] The skirt-shaped membrane on the endoscopic catheter is attached to the skirt-shaped keel in one or more of the following ways: the skirt-shaped membrane is located on the inner or outer side of the free part of the skirt-shaped keel; the skirt-shaped membrane partially or completely covers the free part of the skirt-shaped keel; the skirt-shaped membrane covers the distal end of the free part of the skirt-shaped keel; the skirt-shaped membrane is pleated; the skirt-shaped membrane is made of elastic material; the skirt-shaped membrane completely covers the free part of the skirt-shaped keel and has multiple circumferentially distributed fluid outlets near the distal end of the free part of the skirt-shaped keel.

[0008] To meet different clinical needs, the skirt-shaped keel on the endoscopic catheter has one or more of the following structures: the distal end of the free part of the skirt-shaped keel is swollen; the distal end of the free part of the skirt-shaped keel is hook-shaped towards the central axis of the endoscopic catheter; the distal end of the free part of the skirt-shaped keel has spikes towards the central axis of the endoscopic catheter; the free part of the skirt-shaped keel is sheet-like; the free part of the skirt-shaped keel is columnar; the free part of the skirt-shaped keel is linear; the free part of the skirt-shaped keel is arched towards the central axis of the endoscopic catheter; the free part of the skirt-shaped keel is worm-like or serpentine; and multiple free parts of the skirt-shaped keel overlap and curve laterally.

[0009] The endoscope catheter has multiple free-floating skirt-shaped keel sections, which are connected to the outer surface of the endoscope catheter head via a ring-shaped skirt-shaped keel connecting part. The ring-shaped skirt-shaped keel connecting part and the outer surface of the endoscope catheter head are either fixedly connected, including threaded engagement, or axially adjustable.

[0010] The slit sac on the endoscopic catheter can take any of the following forms: the slit sac is a thin sleeve that is sealed to the outer surface of the endoscopic catheter head in the slit through the slit sac connector; the slit sac can expand under force; the free part of the slit sac forms a cavity between the slit sac and the outer surface of the endoscopic catheter head; or the slit sac is a ring-shaped bag fitted onto the outer surface of the endoscopic catheter head in the slit.

[0011] One convenient structure is that the endoscopic catheter is placed outside the body and the opening of the slit sac is connected to a hollow elastic dynamic sac. Squeezing the elastic dynamic sac can fill the cavity of the slit sac with fluid, causing the slit sac to expand. After the compression is released, the fluid in the cavity of the slit sac flows back to the cavity of the elastic dynamic sac.

[0012] To adsorb moving stones or other pathological tissues, the device also includes a concave disc-shaped aspirator used in conjunction with an endoscopic catheter. The concave disc-shaped aspirator has a concave disc-shaped aspirator port and a bottom opening. The bottom opening of the concave disc-shaped aspirator is connected to a sleeve or a push tube. The sleeve of the concave disc-shaped aspirator is used to fit over the tip of the endoscopic catheter. The push tube is mostly located inside the working channel of the endoscopic catheter and partially extends out of the external opening of the working channel of the endoscopic catheter. The external opening of the push tube is used to connect to negative pressure, and the internal opening of the push tube communicates with the internal cavity of the concave disc-shaped aspirator.

[0013] Furthermore, it also includes a sheath with an irrigation side branch used in conjunction with the endoscopic catheter. The sheath is fitted over the endoscopic catheter and consists of a sheath head, a sheath middle section, and a sheath tail. The sheath lumen has an internal opening for entering the body during use and an external opening for exiting the body during use. The irrigation side branch is located in the tail region of the sheath. When the irrigation side branch opening is connected to an external pressurized water flow, the water flow will enter the sheath gap through the internal lumen of the irrigation side branch. A hollow sealing plug is located at the tail of the sheath to seal the external opening of the sheath. The tip of the endoscopic catheter with a slit capsule enters the internal lumen of the sheath through the sealing plug and protrudes from the internal opening of the sheath.

[0014] One connection scheme is that the sealing plug is in the shape of a stepped tower, and the outer surface of the sealing plug is provided with multiple annular ridges of different outer diameters. The annular ridges near the bottom of the sealing plug have the largest outer diameter, and the outer diameter of the annular ridges gradually decreases from the top to the bottom, so that different interference fits can be applied to the endoscope catheter with the slit sac.

[0015] To reliably connect and disconnect the endoscopic catheter and sheath of this invention, a fastening mechanism is provided near the external opening of the sheath, which can be tightly connected to the tail of the endoscope body. In use, the tip of the endoscopic catheter with the slit sac protrudes from the opening inside the sheath, and the fastening mechanism is activated to tightly connect the sheath with the endoscopic catheter with the slit sac, achieving synchronous advance and retreat of the endoscopic catheter and the sheath. After reaching the target position, the fastening mechanism is released, and the endoscopic catheter with the slit sac can rotate freely or move back and forth inside the sheath.

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

[0017] 1. When this device encounters resistance during the advancement of the natural cavity, the expansion of the slit sac drives the skirt-like body to radially and gently expand the natural cavity in a loop shape based on visualization, which significantly reduces mucosal shear damage during axial advancement in the placement of the endoscope and sheath.

[0018] 2. When the device encounters a narrow passage during its advancement through the natural cavity, the expansion of the slit bladder drives the skirt-like body to radially and gently expand the natural cavity, eliminating the obstruction to the advancement of the device caused by the narrow passage.

[0019] 3. Endoscopic catheters and sheaths can be advanced simultaneously, reducing operational steps and improving efficiency.

[0020] 4. After natural cavities such as the ureter are dilated, the stones are no longer trapped. The concave disc-shaped suction body can attract the stones and move them out of the body. The position of the stones can be adjusted to facilitate their passage through the ureter.

[0021] 5. The concave disc-shaped aspirator can attract and move stones within the kidney, such as from the lower calyx to the upper calyx, to facilitate subsequent lithotripsy.

[0022] 6. The skirt-shaped membrane of this device completely covers the free part of the skirt-shaped body keel, and multiple circumferentially distributed fluid outlets are opened at the distal end of the free part of the skirt-shaped body keel. When the laser fiber acts on the stone, it will generate a local high temperature of several hundred degrees Celsius. The skirt-shaped body first isolates the stone from the ureteral mucosa. The stone fragmentation location is in the space above the tip of the endoscope catheter inside the skirt-shaped body. Cooling water flows through the sheath gap between the inner lumen of the sheath tube and the outer surface of the endoscope catheter into the ureteral lumen, and then flows out from the fluid outlet in the ureteral lumen area outside the skirt-shaped body to cool the high temperature at the center of the stone fragmentation. The heated hot water, along with the stone fragments, is sucked into the opening of the working channel by negative pressure, isolating it from the ureteral mucosa throughout the process, completely eliminating the risk of thermal damage.

[0023] 7. During the lithotripsy process, the negative pressure in the working channel of the endoscopic catheter and the action of the free part of the skirt-shaped body on the stone can prevent the stone from detaching from the optical fiber, so that the lithotripsy process does not need to be interrupted. Moreover, the stone fragments are well isolated and suctioned out through the working channel of the endoscopic catheter, thus achieving the ideal goal of immediate stone removal during the operation and no stone fragments remaining after the operation.

[0024] 8. The radially gentle, circular expansion at the junction of the ureter and bladder from the inside out avoids shear damage caused by axial advancement, protects the Valdère sheath, and minimizes the occurrence of postoperative vesicoureteral reflux.

[0025] It significantly reduces tissue damage, greatly saves surgical time, and lowers treatment costs. Attached Figure Description

[0026] The accompanying drawings are not limited to those of this utility model:

[0027] Figure 1A : Schematic diagram of the use of existing sheaths, sheath cores, and guidewires G;

[0028] Among them, 1A-1: the sheath 3, the sheath core 4, and the guide wire G are assembled together; 1A-2: the rigid endoscope part 12 is shown to be inserted into the guide wire G into the renal pelvis P; 1A-3: the sheath core 4 is inserted into the sheath and moves upward along the guide wire G;

[0029] Figure 1B : Schematic diagram of endoscopic catheter 1 entering the sheath in the prior art;

[0030] In 1B-1: Endoscopic catheter 1 enters sheath 3, and the flexible head portion 12 of endoscopic catheter 1 protrudes from the opening 311 inside the sheath; 1B-2: The head of the sheath is located near the junction of ureter U and renal pelvis P; 1B-3: The flexible head portion 12 of endoscopic catheter protrudes from the opening 311 inside the sheath and extends into the renal pelvis P.

[0031] Figure 1C Example 1: Schematic diagram of the endoscopic catheter, with a partial cross-section showing the endoscopic catheter tip covered with a slit-shaped sac 2;

[0032] Figure 1D Example 1: A three-dimensional schematic diagram from one perspective;

[0033] Figure 1E Example 1: Schematic diagram of the skirt-like body not unfolded;

[0034] Figure 1F Example 1: A schematic diagram showing a partial cross-section of the suture 10 and the skirt-like body of the suture cyst 2 before they unfold;

[0035] Figure 1G Example 1: A three-dimensional schematic diagram from one perspective of the skirt-like body in its undeployed state;

[0036] Figure 1H Example 1: The skirt-like body expands radially to dilate the ureter U, relieving the stone S from its impaction with the ureter U;

[0037] Figure 1I Example 1: A three-dimensional schematic diagram of the stone S after its impaction in the ureter U has been relieved;

[0038] Figure 1J Cross-sectional view of the sheath 3 in Example 1;

[0039] Figure 1K Example 1: Schematic diagram of the combined state of sheath 3 and endoscopic catheter 1;

[0040] Figure 1L Example 1: A three-dimensional schematic diagram showing the separation of the clamping arm T1 and the fastening knob T2;

[0041] Figure 2A : A partial cross-sectional schematic diagram of the concave disc-shaped attractor 7 adsorbing the stone S in Example 2;

[0042] Figure 2B : A three-dimensional schematic diagram of Example 2;

[0043] Figure 3A Example 3: A partial cross-sectional schematic diagram of the concave disc-shaped suction body 7 with a push tube 74 adsorbing the stone S;

[0044] Figure 3B Example 3: A partial cross-sectional view of the concave disc-shaped suction body 7 with push tube 74 near the stone S.

[0045] Figure 3C Example 3: A schematic diagram of the concave disc-shaped suction body 7 connected to the push tube 74 moving forward;

[0046] Figure 4A : A three-dimensional schematic diagram of Example 4;

[0047] Figure 4B Example 4: A three-dimensional schematic diagram of the skirt-like body 6 constraining the stone S;

[0048] Figure 4C Example 4: A three-dimensional schematic diagram of the connection structure between the skirt-shaped body 6 and the head of the endoscope catheter 1;

[0049] Figure 5A : A partial cross-sectional schematic diagram of the laser fiber K-shafting process in Example 5;

[0050] Figure 5B Example 5: A partial cross-sectional schematic diagram of the laser fiber K-shaft lithotripsy process from another perspective;

[0051] Figure 6A Example 6: A schematic cross-sectional view of a skirt-shaped body 6 structure;

[0052] Figure 6B : A cross-sectional schematic diagram of another skirt-shaped body 6 structure in Example 6;

[0053] Figure 6C : A partial three-dimensional schematic diagram of another skirt-shaped body 6 structure in Example 6;

[0054] Figure 7A : A cross-sectional schematic diagram of a suture cyst 2 structure according to Example 7;

[0055] Figure 7B : A cross-sectional schematic diagram of the sealing plug B structure in Example 7;

[0056] The arrows in the diagram indicate the direction of fluid flow. Detailed Implementation

[0057] The following are embodiments that are not limited to the present invention:

[0058] Example 1:

[0059] Existing endoscopic devices include at least one endoscopic catheter 1, which can be used independently or in conjunction with a sheath 3, such as... Figure 1A , 1B As shown, the slender and hollow sheath 3 includes a sheath head 32, a sheath middle section 33, and a sheath tail 34. The sheath has an inner opening 311 for insertion into the body during use, an outer opening 312 for external use, and a side branch opening 313. When the side branch opening 313 is connected to a negative pressure suction device (not shown), an adjustment knob 34a is usually provided on the side branch. The adjustment knob 34a adjusts the negative pressure by controlling whether the inner cavity 34b of the side branch is connected to the outside. A hollow elastic sealing plug B is provided in the outer opening 312. A slender sheath core 4 is placed in the inner cavity 31 of the sheath. The sheath core 4 includes a sheath core head 42, a sheath core middle section, and a sheath core tail 34. Part 43, sheath core tail 44, the inner cavity 41 of the sheath core is provided with an inner opening 411 and an outer opening 412. The outer opening 412 protrudes from the tail 34 of the sheath tube. The end of the tail 44 of the sheath core is located outside the inner cavity 31 of the sheath tube. The end of the tail 44 of the sheath core is provided with a buckle body 441. The buckle body 441 is buckled and connected to the receiving body 342 at the end of the tail 34 of the sheath tube. After the buckle connection, the sheath tube and the sheath core can move forward and backward synchronously. The head 42 of the sheath core is tapered and extends out from the inner opening 311 of the sheath tube. The top tip 321 of the head of the sheath tube 3 and the sharp edge 322 of the inner opening of the sheath tube 3 can be seen in the figure. The guide wire G passes through the inner cavity 41 of the sheath core and protrudes from the inner opening 411 of the sheath core.

[0060] The steps of existing transurethral renal stone surgery are as follows: 1. As Figure 1A -2. The rigid endoscope head 12 enters the bladder through the urethra and then the ureter U; 2. The guide wire G is inserted into the renal pelvis P along the working channel of the rigid endoscope; 3. The rigid endoscope is withdrawn, leaving only the guide wire G in the urinary tract; 4. If... Figure 1A -3, then insert the ureteral sheath 3 and its core 4 through the guidewire; 5. Remove the core from the ureteral guiding sheath (diagram omitted); 6. As Figure 1B -1, then insert the flexible endoscopic catheter 1 into the lumen 31 of the ureteral sheath. Figure 1B -2 shows that the sheath head 32 is located near the junction of the ureter U and renal pelvis P, and the inner opening 311 of the sheath faces the renal pelvis P; Figure 1B -3 shows the flexible endoscope catheter tip 12 protruding from the sheath opening 311 and extending into the renal pelvis P; the working channel 11 of the flexible endoscope catheter tip 12 is responsible for functions such as fiber optic lithotripsy, cooling flushing, and stone retrieval. When the sheath 3 is inserted, it is difficult to pass through when it encounters ureteral stenosis and / or bends, and forceful passage can easily lead to ureteral injury.

[0061] This utility model is as follows Figure 1C-1LAs shown, an endoscope device with a slit capsule includes at least one elongated endoscope catheter 1. The endoscope catheter 1 has an endoscope catheter head 12, an endoscope catheter middle section 13, and an endoscope catheter tail 14. An optical component 0 is provided on the top end 121 of the endoscope catheter head. The endoscope catheter 1 has a working channel 11 that runs through the head and tail. The working channel 11 has an inner opening 111 that enters the body in the use state and an outer opening 112 that is located outside the body in the use state. The endoscope catheter tail 14 is connected to an operating handle 15 for the user to operate the endoscope. The end of the operating handle 15 has an outer opening 112 of the working channel. The operating handle 15 has a power cord inlet and a data cord outlet (not shown) or is powered by a built-in battery (not shown) to a central processor (not shown) to transmit wireless image signals and communicate with the outside.

[0062] The biggest difference from existing technologies is that the endoscopic catheter 1 is also provided with a skirt-like body 6 and an expandable and deformable slit capsule 2. The skirt-like body 6 is composed of a skirt-like body membrane 62 that can expand radially outward under force and multiple circumferentially distributed skirt-like body ribs 61 (in this embodiment, there are 8 sheet-like ribs 61). The skirt-like body membrane 62 is preferably made of an elastic film, such as thin-walled silicone rubber, polyurethane, or thermoplastic elastomer, with a thickness of 0.01 mm to 0.5 mm. It is easily pulled or pushed by the skirt-like body ribs 61 and expands outward to deform. In this example, the skirt-like body The diaphragm 62 circumferentially covers the sheet-like skirt-shaped keel 61; each skirt-shaped keel 61 consists of a connecting part 611 and a free part 612. The skirt-shaped keel 61 can be made from sheet materials with good strength and toughness, such as stainless steel or titanium alloy, or it can be molded from polymer resins such as polyetheretherketone or polyphenylene thionine. The connecting part 611 of the skirt-shaped keel is connected to the outer surface of the endoscope catheter head 12 (e.g., by bonding, welding, riveting, or insertion). The distal end 6123 of the free part 612 of the skirt-shaped keel 61 extends beyond the endoscope. The endoscope catheter tip 121 has a slit sac 2 located within the slit 10 between the skirt-shaped body 6 and the outer surface of the endoscope catheter tip 12. The inner cavity 20 of the slit sac is connected to the outside through a slit sac passage 23 located within the endoscope catheter 1. The opening 231 of the slit sac passage 23 is connected to the inner cavity 20 of the slit sac, and the opening 232 of the slit sac passage 23 is located outside the body. In this example, the slit sac 2 is a thin sleeve, which is tightly connected to the outer surface of the endoscope catheter tip 12 through slit sac connecting portions 21 located at the front and rear ends. The connection is sealed, and the portion between the connecting parts 21 at the front and rear ends of the slit capsule is an expandable and deformable free portion 22 of the slit capsule. The free portion 22 of the slit capsule touches or is adjacent to the inner surface 6121 of the free portion of the skirt-shaped keel 61. When a gaseous or liquid pressurized fluid enters the inner cavity 20 of the slit capsule 2 from outside the body along the slit capsule passage 23, the free portion 22 of the slit capsule deforms under force, expanding radially and pushing the free portion 612 of the skirt-shaped keel 61 outward, that is, away from the central axis L of the endoscope catheter 1, expanding the natural cavity (such as...) from the inside out. Figure 1C, Figure 1D This example demonstrates how a skirt-shaped keel, which is more rigid than the ureter, gently pushes the ureter U from multiple points radially around its free end 6123, causing local dilation of the ureteral lumen N. This achieves an overall internal annular dilation effect. Because the overall dilation force is distributed in an annular pattern, the dilation force is more concentrated than that of traditional planar balloon dilation. After dilation, the ureteral lumen N is easily accessible for the endoscopic catheter 1 and the sheath 3 (if applicable). Figure 1A The ureter is advanced to a distal surgical position to eliminate or significantly reduce damage to the ureter; after the fluid filling of the cavity 20 of the suture sac is relieved, the free portion 22 of the suture sac and the free portion 612 of the skirt-shaped keel 61 return to their previous undeformed state. Figure 1E , Figure 1F , Figure 1G ).

[0063] In this example, the external opening 232 of the slit-bubble passage 23 is located on the endoscope catheter operating handle 15. The external opening 232 of the slit-bubble passage is connected to a hollow elastic power balloon 5. The elastic power balloon 5 is connected to the external opening 232 of the slit-bubble passage through an extension 51. The inner cavity 50 of the elastic power balloon can be filled with gas or liquid. The elastic power balloon 5 has a communication hole 52 that communicates with the external space. When the endoscope catheter 1 with the slit-bubble body of this invention is advanced in the ureteral lumen N, and encounters a narrow or tortuous section that makes it difficult to advance, the elastic power balloon 5 can be squeezed externally to fill the inner cavity 20 of the slit-bubble with fluid (air in this example), causing the free part 22 of the slit-bubble body to expand. The ureteral wall is subjected to local radial expansion from the inside out, eliminating the risk of mucosal shearing damage caused by axial advancement and relieving the obstruction to the advancement at the narrow section of the ureteral lumen N. The pressure is designed to facilitate the passage of the endoscope catheter 1; after the pressure is released, the fluid in the inner cavity 20 of the slit bladder flows back to the inner cavity 50 of the elastic dynamic bladder, and the free part 22 of the slit bladder returns to its pre-inflation shape; the elastic dynamic bladder 5 can be repeatedly squeezed or released with fingers, and the slit bladder 2 will simultaneously inflate or recover, making full use of the elastic dynamic bladder 5's own recovery ability, which is convenient to use; the connecting hole 52 on the elastic dynamic bladder 5 is particularly suitable for gas flow. When squeezed, the finger is pressed to close this connecting hole 52, and the gas in the elastic dynamic bladder 5 fills the inner cavity 20 of the slit bladder. After the free part 22 of the slit bladder expands for a certain period of time, the finger is released, and the elastic dynamic bladder 5's own recovery, plus the gas flowing out from the connecting hole 52, makes the free part 22 of the slit bladder recover faster; of course, an external syringe or other electronically controlled infusion device and negative pressure suction device can also be connected to control the elastic dynamic bladder 5.

[0064] The space 100 inside the skirt-shaped body 6, located above the tip 121 of the endoscope catheter, can isolate the ureteral mucosa, contain stones, prevent stone fragments from escaping, and guide the flow of cooling water.

[0065] The head of the endoscope catheter 1 of this utility model can be bent due to the built-in traction wire and snake bone component (not shown), and the bending operating rod 151 is located on the handle 15. Figure 1C ).

[0066] like Figure 1H , Figure 1I As shown, when a ureteral stone S is lodged in the ureter U, external fluid fills the cavity of the sac, causing the free portion 22 of the sac to expand. The wall of the ureter U is subjected to localized, gentle radial expansion from the inside out, allowing the stone S to be released from its lodged position and enter the space 100 above the tip 121 of the endoscope catheter inside the skirt-shaped body 6. At this time, external negative pressure is connected to the working channel of the endoscope catheter, i.e., the external negative pressure tube (not shown) is connected to the external opening of the working channel, which helps to adsorb the stone S and remove it from the ureter U, rather than requiring laser lithotripsy.

[0067] like Figure 1J , Figure 1K , Figure 1L As shown, the endoscopic device with a slit capsule also includes a matching sheath 3 with an irrigation side branch 341. The sheath 3 is located outside the endoscopic catheter 1 during use and has a sheath head 32, a sheath middle section 33, and a sheath tail 34. The sheath lumen 31 has an inner opening 311 for insertion into the body during use and an outer opening 312 for external insertion. The irrigation side branch 341 is located at the sheath tail 34 and has an irrigation side branch opening 3410. When the irrigation side branch opening 3410 is connected to an external pressurized water flow, the water flow will enter the sheath gap 301 through the irrigation side branch lumen 340. Figure 1K A hollow sealing plug B is located at the tail of the sheath 34 to block the external opening 312 of the sheath. The tip of the endoscopic catheter with the slit capsule enters the inner lumen 31 of the sheath through the sealing plug B and protrudes from the inner opening 311 of the sheath.

[0068] An endoscopic catheter with a slit-shaped sac has a fastening mechanism T located near the external opening 312 of the sheath, which can be tightly connected to the tail 14 of the endoscope body. In this embodiment, the fastening mechanism T consists of an arc-shaped thin-plate clamping arm T1 and a hollow fastening knob T2. The fastening knob T2 has a circular knob opening T22. The clamping arm T1 is configured as two pieces, and the clamping arm T1 is connected to the tail 34 of the sheath via a base T12. The fastening knob T2 has an internal thread T22. 1. After engaging with the external thread T11 of the clamping arm, the clamping arm T1 moves towards the axis L, clamping the endoscope catheter tail 14 located within the clamping arm so that the endoscope sheath can be advanced synchronously; in use, the tip of the endoscope catheter with the slit capsule is extended from the opening 311 inside the sheath, and the fastening mechanism T is activated to tightly connect the sheath 3 with the endoscope catheter 1 with the slit capsule, achieving synchronous advance and retreat of the endoscope catheter 1 and the sheath 3; after reaching the target position, the fastening mechanism T is released. Figure 1LWhen the two clamping arms T1 separate from the fastening knob T2, the clamping arms T1 release the clamping of the endoscope catheter tail 14. In this case, the endoscope sheath is no longer tightly closed, and the endoscope catheter with the clamping sac can rotate freely or move back and forth in the lumen 31 of the sheath.

[0069] Example 2:

[0070] like Figure 2A , Figure 2B As shown, in order to minimize the use of laser lithotripsy and completely eliminate the risks of high temperature, high pressure, and related physical damage during the laser lithotripsy process, the endoscopic device with a slit-shaped sac includes a concave disc-shaped suction body 7 in addition to the endoscopic catheter. The concave disc-shaped suction body 7 has a top suction port 71 and a bottom opening 72. The bottom opening 72 of the concave disc-shaped suction body is connected to a sleeve portion 73. The hollow sleeve portion 73 of the concave disc-shaped suction body is used to fit over the top 121 region of the endoscopic catheter tip. When the ureteral stone S enters the space 100 above the top 121 of the endoscopic catheter tip within the dilated skirt-shaped body 6, the top opening 71 of the concave disc-shaped suction body 7 contacts the stone S, and a portion of the stone S... The stone is drawn into the concave disc-shaped suction body 70. The concave disc-shaped suction body 7 can be made of materials such as silicone rubber or polyurethane through molding. At least the top inlet 71 area is easy to deform, fully contacting the surface of the stone S and improving the adsorption effect. Since the diameter of the stone S embedded in the ureter is usually 5-12 mm, the inner diameter of the top suction inlet 71 of the concave disc-shaped suction body 7, which is 1.5-5 mm, is sufficient to reliably adsorb the stone S. The stone is first moved into the sheath 3 or directly moved to the outside of the body with the endoscopic catheter 1. While dilating the ureter U, the stone S is adsorbed and removed. The dilation time on each segment of the ureter U is very short, which can be controlled between a few seconds and tens of seconds. The time is short and the dilation is circumferential radial from the inside to the outside, with minimal impact on the ureter U.

[0071] Example 3:

[0072] like Figure 3A (Adsorbed stone S) Figure 3B (near stone S) Figure 3CAs shown in (the concave disc-shaped suction body 7 is pushed to the distal end), the biggest difference between this example and Example 2 is that the concave disc-shaped suction body 7 is connected to a push tube 74. The push tube 74 is sleeved in the downward extension 721 of the concave disc-shaped suction body 7. The push tube 74 is partially located in the working channel of the endoscope catheter and partially extends out of the external opening of the working channel of the endoscope catheter. The external opening of the push tube 74 (not shown) is used to connect to negative pressure. The internal opening 741 of the push tube 74 is connected to the internal cavity 70 of the concave disc-shaped suction body. The push tube 74 can allow the concave disc-shaped suction body 7 to move back and forth without being constrained by the endoscope catheter 1, making it easier to contact the stone S. The rotation operation is more conducive to fully adhering to and adsorbing the surface of the stone S. The concave disc-shaped suction body 7 can be made into various opening shapes. In specific use, the appropriate specifications can be selected according to the observed surface characteristics of the stone morphology to further improve the adsorption and removal effect of the stone S.

[0073] Example 4:

[0074] like Figure 4A , Figure 4B , Figure 4C As shown, to increase the dilation efficiency of the skirt-shaped body 6 on the ureter U and the restraint of the stone S, the free part 612 of the skirt-shaped body keel 61 is arched and convex toward the central axis L of the endoscope catheter 1. The arched structure has better rigidity with the same wall thickness and length of the free part 612, and is less likely to yield due to reaction force when dilating the ureter U. The distal end 6123 of the free part 6123 of the skirt-shaped body keel is provided with a protrusion 6124 toward the central axis L of the endoscope catheter 1. The protrusion 6124 can penetrate the stone S to help lock the stone S and remove it through the sheath 3 or directly with the endoscope catheter 1.

[0075] In this example, there are multiple free parts 612 of the skirt-shaped keel, and the connecting part 611 of the skirt-shaped keel is connected to the outer surface of the endoscope catheter head 12 in a ring shape. That is, multiple free parts 612 of the skirt-shaped keel share a ring-shaped connecting part 611 of the skirt-shaped keel, which is more stably connected to the endoscope catheter head 12.

[0076] Figure 4C This shows that the skirt-shaped body 6 and the endoscope catheter head 12 are adjustablely connected. The annular skirt-shaped body keel connecting part 611 is provided with annular protrusions 6110. The annular protrusions 6110 can be embedded in the annular grooves 120 on the outer surface of the endoscope catheter head 12. In this example, five annular grooves 120 in different positions are provided to adjust the sleeve position of the skirt-shaped body 6, which facilitates individualized adjustment of the dilation force on the ureter U during clinical use.

[0077] Example 5:

[0078] like Figure 5A , Figure 5BAs shown, when intrarenal, intrabladder, or ureteral stones S require laser lithotripsy, water cooling and flushing of stone fragments S1 are essential processes. Existing technologies can cause high-temperature water flow damage to the urinary tract mucosa during this process, and poor reflux can also lead to high pressure risks. To completely eliminate these two risks and improve the removal effect on stone fragments S1, the skirt-shaped membrane 62 of this embodiment completely covers the free portion 612 of the skirt-shaped body keel, and multiple circumferentially distributed outlets 620 are opened near the distal end 6123 of the free portion of the skirt-shaped body keel. When the laser fiber K acts on the stone S, it generates localized high temperatures of several hundred degrees Celsius. The skirt-shaped body 6 first separates the stone S from the ureter U... With mucosal isolation, the lithotripsy site is located in the space 100 above the tip 121 of the endoscope catheter inside the skirt body 6. Cooling water (indicated by the arrow in the figure) enters the ureteral lumen N through the sheath gap 301 between the inner lumen of the sheath 3 and the outer surface of the endoscope catheter 1, and then flows out from the outlet 620 through the ureteral lumen area N0 outside the skirt body 6 to cool the high temperature at the center of the lithotripsy. The heated hot water, along with the stone fragments S1, is sucked into the working channel opening 111 by negative pressure, is isolated from the ureteral mucosa throughout the process, completely eliminating the risk of thermal damage (the upward and diagonal arrows in the figure indicate the direction of cold water flow, and the downward arrow indicates the direction of hot water flow).

[0079] During the lithotripsy process, the negative pressure in the working channel 11 of the endoscopic catheter and the action of the skirt-shaped free part 62 on the stone S can prevent the stone S from detaching from the optical fiber K, so that the lithotripsy process does not need to be interrupted. Moreover, the stone fragments S1 are well isolated and aspirated through the working channel 11 of the endoscopic catheter, thus achieving the ideal goal of immediate stone removal during the operation and no stone fragments S1 remaining after the operation.

[0080] Example 6:

[0081] like Figure 6A The skirt-shaped keel free portion 612 is shown to be sheet-like, and the skirt-shaped membrane 62 is located on the outer side 6121 of the skirt-shaped keel free portion 612, which is bonded or welded together. The skirt-shaped membrane 62 partially covers the skirt-shaped keel free portion 612, exposing multiple keel gaps 6125. This design reduces the amount of material used while ensuring the integrated movement of the skirt-shaped keel free portion 612.

[0082] Figure 6B Another structure is shown, in which the free part 612 of the skirt-shaped body keel is columnar, the distal end 6123 is enlarged, and the skirt-shaped body membrane 62 covers the enlarged distal end 6123 of the free part of the skirt-shaped body keel. This structure can contact a larger area of ​​ureteral mucosa and reduce the risk of compression injury.

[0083] Figure 6CAnother structure is shown, in which the skirt-shaped membrane 62 is pleated and can unfold as the free portion 612 of the skirt-shaped body keel expands, even if it is made of an inelastic membrane material. At the same time, in this example, the distal end 6123 of the free portion of the skirt-shaped body keel is hooked toward the central axis of the endoscope catheter 1, which helps to restrain the contacting stones.

[0084] Example 7:

[0085] like Figure 7A As shown, unlike the previous embodiment, the slit bladder 2 is an integral ring-shaped sleeve fitted onto the outer surface of the endoscope catheter head 12 in the slit 10. The entire slit bladder 2 is expandable. The inner cavity 20 of the slit bladder is connected to a connecting tube 211. The connecting tube 211 is inserted into the passage 23 of the slit bladder. When filled, fluid enters the inner cavity 20 of the slit bladder from the passage 23 of the slit bladder through the inner cavity 2110 of the connecting tube in the direction of the arrow.

[0086] Figure 7B This paper presents another connection scheme between an endoscope catheter 1 and a sheath 3 with a slit-shaped capsule. The two are connected by a hollow sealing plug B, which is stepped and tower-shaped. The endoscope catheter 1 passes through the sealing plug B and enters the tail 34 of the sheath. The tail 34 of the sheath is connected to an irrigation side branch 341. The outer surface of the sealing plug B has multiple annular ridges B1 with different outer diameters. The annular ridge B1 near the bottom B2 of the sealing plug B has the largest outer diameter, and the outer diameter of the annular ridge B1 gradually decreases from the top B3. This structure adjusts the bonding strength between the endoscope catheter 1 and the sheath 3 by adjusting the interference contact degree of the stepped arrangement. The inner surface of the sealing plug B has multiple annular recesses B0 to reduce the friction with the outer surface of the endoscope catheter 1, making it easier for the endoscope catheter 1 to pass through the sealing plug B under the premise of sealed contact.

[0087] The various tubes described in this utility model are positioned as follows: the head is the distal end, which is inserted into the body during use; the tail is the proximal end, which is usually 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.

[0088] This utility model's endoscopic device with a slit capsule effectively relieves stone impaction, performs minimally invasive or even non-invasive stone removal, minimizes the risk of high temperature and high pressure damage during laser treatment, saves surgical time, and reduces treatment costs. It can be used for medical procedures in various natural cavities, including the respiratory tract, ear canal, lacrimal duct, reproductive tract, and digestive tract, or in the third space such as the thoracic cavity and abdominal cavity of living organisms. It can also be used for medical procedures involving blood vessels, penetrating wounds, and pathological sinuses.

Claims

1. An endoscope device having a slit capsule, comprising at least one elongated endoscope catheter (1), an optical component (0) being provided on the top end (121) of the endoscope catheter (1), the endoscope catheter (1) having a working channel (11) extending through the head and tail, the working channel (11) having an internal opening (111) for entering the body in the use state and an external opening (112) for being located outside the body in the use state; Its features are: The endoscopic catheter (1) is also provided with a skirt-shaped body (6) and an expandable and deformable slit sac (2). The skirt-shaped body (6) is composed of a skirt-shaped body membrane (62) that can expand radially outward after being stressed and a plurality of circumferentially distributed skirt-shaped body keels (61). The skirt-shaped body keels (61) are composed of a connecting part (611) and a free part (612). The connecting part (611) of the skirt-shaped body keel is connected to the outer surface of the head of the endoscopic catheter (12). The distal end (6123) of the free part of the skirt-shaped body keel (61) extends beyond the tip (121) of the head of the endoscopic catheter. The slit sac (2) is at least partially located in the skirt-shaped body. (6) Inside the gap (10) between the endoscope catheter head (12) and the outer surface; the inner cavity (20) of the gap cyst is connected to the outside through the gap cyst passage (23), the inner opening (231) of the gap cyst passage (23) is connected to the inner cavity (20) of the gap cyst, and the outer opening (232) of the gap cyst passage (23) is located outside the body; when the pressure fluid enters the inner cavity (20) of the gap cyst from outside the body along the gap cyst passage (23), the gap cyst (2) expands under force and pushes the free part (612) of the skirt-shaped body keel (61) to expand radially outward, expanding the natural cavity from the inside out.

2. The endoscopic device with a slit capsule according to claim 1, characterized in that, The skirt-shaped membrane (62) on the endoscope catheter (1) is attached to the skirt-shaped keel (61) in one or more of the following ways: the skirt-shaped membrane (62) is located on the inner side (6121) or outer side (6122) of the free part (612) of the skirt-shaped keel; the skirt-shaped membrane (62) partially or completely covers the free part (612) of the skirt-shaped keel; the skirt-shaped membrane (62) covers the distal end (6123) of the free part (6123) of the skirt-shaped keel; the skirt-shaped membrane (62) is pleated; the skirt-shaped membrane (62) is made of elastic material; the skirt-shaped membrane (62) completely covers the free part (612) of the skirt-shaped keel and has multiple circumferentially distributed outlets (620) near the distal end (6123) of the free part (6123) of the skirt-shaped keel.

3. The endoscopic device with a slit capsule according to claim 1, characterized in that, The skirt-shaped keel (61) on the endoscope catheter (1) has one or more of the following structures: the distal end (6123) of the free part of the skirt-shaped keel is enlarged; the distal end (6123) of the free part of the skirt-shaped keel is hooked toward the central axis (L) of the endoscope catheter (1); the distal end (6123) of the free part of the skirt-shaped keel is provided with a spike (6124) toward the central axis (L) of the endoscope catheter (1); the free part (612) of the skirt-shaped keel is sheet-like; the free part (612) of the skirt-shaped keel is columnar; the free part (612) of the skirt-shaped keel is linear; the free part (612) of the skirt-shaped keel is arched and convex toward the central axis (L) of the endoscope catheter (1); the free part (612) of the skirt-shaped keel is worm-like or serpentine; and multiple free parts (612) of the skirt-shaped keel are laterally curved and overlap each other.

4. The endoscopic device with a slit capsule according to claim 1, characterized in that, The endoscope catheter (1) has multiple skirt-shaped keel free parts (612), which are connected to the outer surface of the endoscope catheter head (12) through a ring-shaped skirt-shaped keel connecting part (611); the ring-shaped skirt-shaped keel connecting part (611) and the outer surface of the endoscope catheter head (12) are a fixed connection including threaded engagement or an axially adjustable connection.

5. The endoscopic device with a slit capsule according to claim 1, characterized in that, The slit sac (2) on the endoscope catheter (1) has any of the following forms: the slit sac (2) is a thin sleeve that is sealed to the outer surface of the endoscope catheter head (12) in the slit (10) through the slit sac connector (21) and can expand under force to form a slit sac cavity (20) between the slit sac free part (22) and the outer surface of the endoscope catheter head (12); the slit sac (2) is a ring bag that is fitted onto the outer surface of the endoscope catheter head (12) in the slit (10).

6. The endoscopic device with a slit capsule according to claim 1, characterized in that, The endoscopic catheter (1) is placed outside the slit capsule passage (23) with an external opening (232) connected to a hollow elastic dynamic capsule (5). Squeezing the elastic dynamic capsule (5) can fill the fluid inside into the cavity (20) of the slit capsule, causing the slit capsule (2) to expand. After the squeezing is released, the fluid in the cavity (20) of the slit capsule flows back to the cavity (50) of the elastic dynamic capsule.

7. The endoscopic device with a slit capsule according to claim 1, characterized in that, It also includes a concave disc-shaped suction body (7) used in conjunction with the endoscope catheter (1). The concave disc-shaped suction body (7) has a concave disc-shaped suction port (71) and a concave disc-shaped suction body bottom opening (72). The bottom opening (72) of the concave disc-shaped suction body is connected to a sleeve part (73) or a push tube (74). The sleeve part (73) of the concave disc-shaped suction body is used to fit over the top end (121) area of ​​the endoscope catheter head. The push tube (74) is partially located inside the endoscope catheter working channel (11) and partially extends out of the endoscope catheter working channel external opening (112). The external opening of the push tube (74) is used to connect to negative pressure. The internal opening (741) of the push tube (74) is connected to the internal cavity (70) of the concave disc-shaped suction body.

8. The endoscopic device with a slit capsule according to claim 1, characterized in that, It also includes a sheath (3) with an irrigation side branch (341) for use with the endoscope catheter (1). The sheath (3) is fitted over the endoscope catheter (1) and consists of a sheath head (32), a sheath middle section (33), and a sheath tail (34). The sheath lumen (31) has an inner opening (311) for entering the body during use and an outer opening (312) for being outside the body during use. The irrigation side branch (341) is located in the sheath. In the tail (34) region, when the infusion side branch opening (3410) is connected to the external pressure water flow, the water flow will enter the sheath gap (301) through the infusion side branch inner cavity (340). A hollow sealing plug (B) is located at the tail (34) of the sheath tube to block the outer opening (312) of the sheath tube. The tip (121) of the endoscope catheter with the slit capsule enters the inner cavity (31) of the sheath tube through the sealing plug (B) and protrudes from the inner opening (311) of the sheath tube.

9. The endoscopic device with a slit capsule according to claim 8, characterized in that, The sealing plug (B) is in the shape of a stepped tower. The outer surface of the sealing plug (B) is provided with multiple annular ridges (B1) with different outer diameters. The annular ridge (B1) near the bottom (B2) of the sealing plug has the largest outer diameter. The outer diameter of the annular ridge (B1) gradually decreases from the top (B3) to the top. It can be used to act on the endoscope catheter (1) with the slit sac to different degrees.

10. The endoscopic device with a slit capsule according to claim 8, characterized in that, A fastening mechanism (T) is provided in the area adjacent to the external opening (312) of the sheath, which can be tightly connected to the tail (14) of the endoscope body. When in use, the tip (121) of the endoscope catheter with the slit sac is extended from the internal opening (311) of the sheath, and the fastening mechanism (T) is activated to tightly connect the sheath (3) with the endoscope catheter (1) with the slit sac, so as to realize the synchronous advance and retreat of the endoscope catheter (1) and the sheath (3). After reaching the target position, the fastening mechanism (T) is released, and the endoscope catheter (1) with the slit sac can rotate freely or move back and forth in the inner cavity (31) of the sheath.

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