Negative pressure stone basket and integrated endoscope catheter
By combining a negative pressure stone basket with an endoscopic catheter, continuous removal of stone fragments and efficient stone fragmentation are achieved, solving the problems of stone residue and high temperature and high pressure damage in traditional methods, and improving the safety and efficiency of laser lithotripsy of the urinary system.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-27
- Publication Date
- 2026-03-24
AI Technical Summary
Traditional lithotripsy baskets are difficult to open in confined spaces, making it impossible to effectively capture stone fragments. This leads to increased stone residue, postoperative infection, and recurrence risks. Furthermore, the laser lithotripsy process is time-consuming, and the risk of damage from high temperature and high pressure is difficult to avoid.
A negative pressure stone basket is designed, which is combined with an endoscope catheter to continuously remove stone debris through negative pressure suction and cooling flushing water flow. Negative pressure is connected to the working channel of the endoscope catheter, and cooling and flushing water flow is delivered through the gap of the endoscope sheath. The negative pressure stone basket has water inlet channels distributed around its circumference to achieve continuous discharge of stone powder and effective heat removal.
It improves lithotripsy efficiency, reduces surgical time, eliminates the risk of damage from high temperature and high pressure, significantly reduces the risk of residual stones, and shortens surgical time by 20%-50%.
Smart Images
Figure CN224023625U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a kind of negative pressure stone basket and integrated endoscope catheter, belong to medical instrument product technical field. BACKGROUND
[0002] Urinary system stone laser surgery is very common clinically, some poorly located original stones need to be moved to the area for facilitating the release of laser, and some broken stone clumps also need to be removed in time. The traditional technology usually uses a stone basket to grab, but in the narrow space of kidney calyx and ureter, the stone basket is often difficult to fully open, and the original stone and broken stone clumps cannot enter the small stone basket mesh. Even during the laser lithotripsy process, large-sized stone clumps are removed after being trapped by the traditional stone basket made of multiple wires, but there are still a large amount of stone debris remaining, with an average diameter of about 2mm. The stone basket is difficult to grab, and the water flow has no direction to follow for direct flushing, resulting in poor cleaning effect. Finally, the patient's own urine gradually expels the stone debris outside the body within several days after the operation. Clinical studies have shown that the residual stone debris or stone powder can significantly increase the risk of postoperative urinary tract infection and stone recurrence. In recent years, after the popularization of negative pressure technology, the negative pressure suction in the gap between the scope sheath and the working channel combined with the perfusion liquid vortex in the opening of the working channel can play a non-basket stone debris negative pressure suction and removal role. However, it takes a lot of time and effort to move the stone debris to the outside of the body, usually one piece of stone debris at a time, with a high operation frequency. To avoid excessive local temperature, the current method is to release the laser intermittently. The whole laser lithotripsy process is time-consuming, and it is difficult to completely avoid the high temperature and high pressure damage to the urinary system during the stone breaking process. SUMMARY
[0003] To achieve the purpose of continuous stone breaking without high temperature and high pressure risk, simultaneous suction of stone powder and efficient removal of stone debris, the utility model provides a negative pressure stone basket and a negative pressure stone basket integrated endoscope catheter. The stone can be broken in the negative pressure stone basket, the negative pressure is connected in the working channel of the endoscope catheter, the cooling and flushing water flow delivered through the gap between the scope sheath and the working channel enters the negative pressure stone basket through the water inlet channel distributed around the opening below the negative pressure stone basket, and the heat generated by the laser and the stone powder are continuously discharged to the outside of the body. Multiple stone debris with larger volume can be retained in the upper cavity of the negative pressure stone basket containing part and removed to the outside of the body at one time.
[0004] The utility model is implemented as follows:
[0005] A negative pressure stone basket, the main body is cylindrical, the inner cavity of the cylindrical negative pressure stone basket is provided with a negative pressure stone basket outer opening and a negative pressure stone basket inner opening, the negative pressure stone basket outer opening and the negative pressure stone basket connecting part are sleeved on the area adjacent to the top end of the endoscope catheter head, the negative pressure stone basket containing part protrudes from the top end of the endoscope catheter, the negative pressure stone basket inner opening is the external opening of the negative pressure stone basket containing part inner cavity, the exploring assembly of the endoscope catheter top end and the endoscope catheter working channel inner opening are located at the bottom of the negative pressure stone basket containing part inner cavity, a plurality of water inlet channels are arranged adjacent to the negative pressure stone basket inner opening, the plurality of water inlet channels are distributed along the circumference of the negative pressure stone basket inner opening, water flow can enter the water inlet channel through the water inlet channel outer port due to the negative pressure suction of the negative pressure stone basket containing part inner cavity, and then enter the negative pressure stone basket containing part inner cavity through the water inlet channel inner port; during laser lithotripsy, water enters the gap between the sheath and the endoscope catheter, the working channel of the endoscope catheter is connected to a negative pressure source, the negative pressure stone basket inner opening is close to or in contact with the target stone, the optical fiber is stretched out from the inner opening of the working channel of the endoscope catheter to touch or be adjacent to the target stone to release energy to break the stone, and the water flow is continuously introduced into the negative pressure stone basket containing part inner cavity through the water inlet channel due to the negative pressure suction source, so that the stone debris and the heat energy generated by the laser are discharged to the outside of the body through the working channel of the endoscope catheter along with the water flow.
[0006] The at least outer opening area of the negative pressure stone basket is flexible, which can better contact the surface of the stone and play a blocking role, thereby avoiding the escape of stone powder generated during laser lithotripsy.
[0007] The negative pressure stone basket is preferably transparent, which is convenient for image acquisition of the endoscope.
[0008] At least one of the outer surface and the inner surface of the negative pressure stone basket is attached with a hydrophilic coating, which can significantly reduce the friction between the negative pressure stone basket and the ureter, renal pelvis and calyx when they are in contact, thereby reducing mucosal damage; and the hydrophilic coating can also reduce the friction when the negative pressure stone basket moves in the sheath.
[0009] Further, the negative pressure stone basket inner opening is provided with an outward flared skirt, which makes the surface area of the negative pressure stone basket inner opening greater than the average transverse cross-sectional area of the negative pressure stone basket containing part inner cavity, so that the outward flared skirt can better prevent the escape of stone powder during lithotripsy and is conducive to the realization of immediate stone clearance.
[0010] In order to better expand and deform during use, the thickness of the outward flared skirt is lower than the thickness of the main body of the negative pressure stone basket, and / or a weak zone is arranged at the junction between the outward flared skirt and the main body of the negative pressure stone basket, the outward flared skirt can be smooth or wrinkled, and the wrinkled outward flared skirt is more easily attached to the stone.
[0011] In order to provide better cooling and flushing water flow, a plurality of water inlet channels are distributed along the circumference of the outward flared skirt, and / or a plurality of water inlet notches are arranged on the outward flared skirt, and the plurality of water inlet notches are distributed along the circumference of the outward flared skirt.
[0012] One optimization structure is that the water inlet channel is closer to the negative pressure stone basket inner opening than the water inlet channel outer opening, so that the water flow is closer to the lithotripsy position of the laser fiber.
[0013] Another optimization structure is that the negative pressure stone basket is provided with a circumferentially distributed continuous or intermittent weak belt below the water inlet channel, and the weak belt makes the part of the negative pressure stone basket containing portion, which is provided with the water inlet channel, easily expand outward or fold when stressed.
[0014] When a larger stone is moved using the negative pressure stone basket, the water inlet channel opening state is not conducive to the negative pressure effect, and the weak belt makes the part of the negative pressure stone basket containing portion, which is provided with the water inlet channel, expand outward or fold when stressed, i.e., when pressed by the stone, so that external water flow is difficult to enter the negative pressure stone basket containing portion inner cavity, and the stone will be subjected to greater negative pressure attraction.
[0015] In order to facilitate the initial movement of the stone during the operation, the upper part of the negative pressure stone basket containing portion is in a folded state, and the upper part of the folded negative pressure stone basket containing portion is provided with a circumferentially distributed water inlet channel, so that the negative pressure will not be weakened through the water inlet channel when the stone is initially adsorbed and moved.
[0016] In order to avoid that the larger stone fragments block the working channel inner opening or the working channel, a sheet-shaped transparent isolation body is further arranged in the negative pressure stone basket containing portion inner cavity, the isolation body separates the negative pressure stone basket containing portion inner cavity into a negative pressure stone basket containing portion upper cavity and a negative pressure stone basket containing portion lower cavity, the isolation body is provided with a fiber hole for the fiber to pass through and a plurality of interception holes, and the cross-sectional area of each interception hole is smaller than the surface area of the working channel inner opening of the matching endoscope catheter.
[0017] The fiber hole further extends a fiber guide tube, and the fiber guide tube is in a curved or straight shape, and the curved fiber guide tube can make the fiber bend and be more easily accessible to the stone located on the curved side.
[0018] The negative pressure stone basket inner opening is inclined to one side or curved to one side.
[0019] The above-mentioned negative pressure stone basket can be sleeved on the endoscope catheter during use, and another scheme is that the head top end portion of the endoscope catheter is pre-provided with the above-mentioned negative pressure stone basket.
[0020] The beneficial effects of the utility model are as follows:
[0021] 1. The negative pressure stone basket adsorbs the original target stone through the flexible inner opening area and moves the stone to a favorable lithotripsy position, such as from the lower calyx to the upper calyx, which is convenient to use and reduces the dependence on the operation space, and replaces the traditional stone net basket.
[0022] 2. During lithotripsy, the flexible inner opening area of the negative pressure stone basket partially covers the target stone, and then the laser fiber contacts or approaches the stone, which can continuously release laser energy. The negative pressure is accessed through the working channel of the endoscope catheter, and the cooling and flushing water flow in the sheath gap is transported through the water inlet channels around the inner opening of the negative pressure stone basket into the inner cavity of the negative pressure stone basket. The heat generated by the laser and the stone powder with a diameter of about 250 microns are continuously discharged to the outside of the body through the working channel, greatly improving the efficiency of lithotripsy, while the whole process is free of high-temperature water flow contacting the mucosa of the urinary tract, completely eliminating the risk of high-temperature damage during surgery.
[0023] 3. Due to the cooling and flushing water flow in the sheath gap, the transverse cross-sectional area of the sheath gap is larger than that of the working channel of the endoscope catheter, and the water supply capacity is superior. By setting a safe perfusion pressure, such as a perfusion pressure lower than 30 mmHg, the flow rate is adjusted by negative pressure, completely eliminating the risk of high pressure during laser lithotripsy, and saving surgical costs without pressure monitoring.
[0024] 4. Because the transverse cross-sectional area of the sheath gap is larger than that of the working channel of the endoscope catheter, the water supply capacity is sufficient, and smaller diameter sheath tubes can be selected for use with the endoscope catheter, significantly reducing the damage of the sheath tube to the urinary tract.
[0025] 5. During laser lithotripsy, multiple stone fragments with a diameter of about 2 mm can be retained in the upper cavity of the negative pressure stone basket, and then quickly removed to the outside of the body, greatly saving the operation time.
[0026] 6. The "internal collection" irrigation fluid flow mode "internally collects" the stone powder in the negative pressure stone basket, which helps to achieve immediate stone clearance and save operation time. The traditional "external placement" irrigation fluid flow mode scatters the stone powder everywhere, which is difficult to remove.
[0027] 7. The inner opening of the negative pressure stone basket is inclined to one side or bent to one side, which helps to fully contact and adsorb the stones that are located in a deviated position.
[0028] 8. The negative pressure stone basket has multiple specific structures to meet clinical needs: the extended skirt increases the contact area with the stone, better plays the role of blocking to avoid the escape of stone powder; multiple water inlet notches on the extended skirt ensure sufficient water flow; the water inlet channel direction is towards the inner opening of the negative pressure stone basket, making the water flow closer to the laser fiber lithotripsy area; the setting of the weak belt makes the area where the water inlet channel is opened easy to expand or fold, which is convenient for adsorption and movement of large volume stones.
[0029] 9. The upper part of the negative pressure stone basket is folded, and the water inlet channels are circumferentially distributed in the folded area. During use, the stone is first adsorbed and moved, and then the folded area is unfolded during laser lithotripsy to expose the water inlet channels.
[0030] 10. When the stone is located at a more deviated position, the curved optical fiber guide tube on the isolation body can drive the optical fiber to bend to the side of the stone.
[0031] 11. The negative pressure stone basket integrated endoscope catheter prepositions the negative pressure stone basket at the top end area of the head of the endoscope catheter, and is more convenient to use.
[0032] The negative pressure stone basket and the negative pressure stone basket integrated endoscope catheter make the urological laser lithotripsy surgery upgrade from intermittent laser release to continuous performance, and the stone powder is continuously removed, the average operation time is shortened by 20%-50% during in-vitro simulation, and the high temperature and high pressure risks during the operation are completely eliminated. BRIEF DESCRIPTION OF DRAWINGS
[0033] The drawings of the utility model are as follows, which are not limited to the utility model:
[0034] Figure 1A : Partial cutaway perspective view of the negative pressure stone basket, endoscope catheter and matched sheath of Example 1
[0035] Figure 1B : Partial cutaway view of the negative pressure stone basket entering the renal calyx of Example 1
[0036] Figure 1C : Perspective view of the negative pressure stone basket from one angle of Example 1
[0037] Figure 1D : Perspective view of the negative pressure stone basket from another angle of Example 1
[0038] Figure 2A : Partial cutaway perspective view of the negative pressure stone basket in the laser lithotripsy state of Example 2
[0039] Figure 2B : Cutaway perspective view of the negative pressure stone basket provided with a water inlet notch structure of Example 2
[0040] Figure 2C : Cutaway perspective view of the negative pressure stone basket provided with an outer expansion type skirt edge of Example 2
[0041] Figure 3A : Cutaway perspective view of the negative pressure stone basket provided with a weak belt of Example 3
[0042] Figure 3B : Partial cutaway perspective view of the negative pressure stone basket attracting the stone of Example 3
[0043] Figure 3C : Partial cutaway perspective view of the negative pressure stone basket attracting the stone in the upper folding state of the containing part of Example 3
[0044] Figure 4AFig. 4 is a partial cutaway perspective view of the embodiment 4 showing the lumen of the negative pressure stone basket housing having a spacer
[0045] Figure 4B Fig. 5 is a partial cutaway perspective view of the embodiment 4 showing the spacer extending out of the fiber optic guide tube
[0046] Figure 4C Fig. 6 is a perspective view of the embodiment 4 from another angle
[0047] Figure 5A Fig. 7 is a partial cutaway perspective view of the embodiment 5 showing the negative pressure stone basket inner opening angled to one side
[0048] Figure 5B Fig. 8 is a partial cutaway perspective view of the embodiment 5 showing the negative pressure stone basket inner opening curved to one side
[0049] Figure 5C Fig. 9 is a partial cutaway perspective view of the embodiment 5 showing the fiber optic guide tube curved
[0050] Each arrow in the above figures indicates the direction of water flow DETAILED DESCRIPTION
[0051] The embodiments of the present application are not limited to the following:
[0052] Embodiment 1
[0053] As Figures 1A-1DAs shown, the sheath 3 and the endoscope catheter 1 for urinary stone surgery, the elongated endoscope catheter 1 is provided with a probe assembly 112 and a working channel 10 through the head and tail, the working channel 10 is provided with a working channel inner opening 101 entering the body during use and a working channel outer opening 102 located outside the body, the working channel inner opening 101 is opened at the position of the top end 111 of the head of the endoscope catheter, the elongated endoscope catheter 1 includes a head 11, an intermediate part 12 and a tail 13, the probe assembly 112 on the endoscope catheter is usually arranged in the region adjacent to the top end 111 of the endoscope catheter, the probe assembly 112 usually includes a lens, an optical window and a pressure and temperature sensor, etc., the tail 13 of the endoscope catheter is connected with a handle H for the user to hold and operate, the handle H is hollow inside and continues with the working channel 10 of the endoscope catheter 1, the handle H is also provided with a working channel side branch H3 for the guide wire or optical fiber to pass through and a handle side branch H2 connected with a negative pressure suction device, the working channel outer opening 102 is located on the handle side branch H2, the handle H is also provided with a regulating body H1 for adjusting the bending degree and / or bending direction of the head 11 of the endoscope catheter 1; the sheath 3 is sleeved outside the endoscope catheter 1 during use, the hollow sheath 3 has a sheath lumen 30, the elongated sheath 3 includes a sheath head 31, a sheath intermediate part 32 and a sheath tail 33, the sheath 3 is provided with a sheath inner opening 301 entering the body during use and a sheath outer opening 302 located outside the body, the sheath 3 in this embodiment is also provided with a sheath side branch 34, the sheath side branch has a sheath side branch lumen 340, the sheath side branch 34 can be connected with an infusion device (not shown), when the sheath side branch 34 is connected with the infusion device, the external fluid can enter the sheath lumen 30 through the sheath side branch lumen 340, then pass through the gap 300 between the sheath and the endoscope catheter and finally enter the human body through the sheath inner opening 301, the sheath tail 33 is provided with a sealing plug C, the endoscope catheter 1 enters the sheath lumen 30 through the sealing plug C.
[0054] The endoscope catheter head 11 is sleeved with a negative pressure stone basket 2 with a cylindrical main body, the cylindrical negative pressure stone basket lumen 20 is provided with a negative pressure stone basket outer opening 202 and a negative pressure stone basket inner opening 201, the negative pressure stone basket outer opening 202 and the negative pressure stone basket connecting part 22 are sleeved in the region adjacent to the top end 111 of the endoscope catheter 1 head 11, the negative pressure stone basket containing part 21 protrudes out of the top end 111 of the endoscope catheter, the negative pressure stone basket inner opening 201 is the external opening of the negative pressure stone basket containing part lumen 210, the probe assembly 112 of the top end 111 of the endoscope catheter 1 and the working channel 10 inner opening 101 of the endoscope catheter 1 are located at the bottom of the negative pressure stone basket containing part lumen 210, a plurality of water inlet channels 211 are arranged adjacent to the negative pressure stone basket inner opening 201, the plurality of water inlet channels 211 are distributed along the circumference of the negative pressure stone basket inner opening 201, such as Figure 1BAs shown, water flow can enter the water inlet channel 211 through the water inlet channel outer opening 2112 due to the negative pressure in the negative pressure stone basket accommodating portion inner cavity 210, and then enter the negative pressure stone basket accommodating portion inner cavity 210 through the water inlet channel inner opening 2111; the negative pressure stone basket 2 can be made of optical grade silicone rubber and / or optical grade resin, and can be hard or flexible, or have a hard body but a flexible region around the negative pressure stone basket inner opening 201.
[0055] During laser lithotripsy, as shown, Figure 1B As shown, the stone S is located in a calyx K1 of the kidney K, the sheath tube 3 inserted into the renal pelvis KO is connected to the scope sheath gap 300, water is introduced into the gap, the working channel 10 of the endoscope catheter is connected to a negative pressure device (not shown), the negative pressure stone basket inner opening 201 is close to or in contact with the target stone S, the optical fiber L is extended from the working channel inner opening 101 of the endoscope catheter 1 to touch or be adjacent to the target stone S to release energy to break the stone S, and water flow is continuously introduced into the negative pressure stone basket accommodating portion inner cavity 210 through the water inlet channel 211 due to the negative pressure source, so that the stone powder S1 with a diameter of about 250 microns and the heat generated by the laser are continuously discharged to the outside of the body along with the water flow through the working channel 10 of the endoscope catheter, greatly improving the efficiency of stone crushing while avoiding high-temperature water flow contact with the mucosa of the urinary tract throughout the process, completely eliminating the risk of high-temperature damage during surgery.
[0056] The negative pressure stone basket inner opening 201 is provided with an outwardly extending skirt 212, preferably made of flexible material, which makes the surface area of the negative pressure stone basket inner opening 201 larger than the average transverse cross-sectional area of the negative pressure stone basket accommodating portion inner cavity 210, and is beneficial for outward deformation during use. The outwardly extending skirt 212 can be smooth or wrinkled (not shown), and the wrinkled outwardly extending skirt 212 is more easily attached to the stone S.
[0057] Even without the outwardly extending skirt 212, the negative pressure stone basket can move the original target stone S to a favorable position for stone crushing by adsorbing it through the flexible inner opening region, such as from the lower calyx to the upper calyx, which is convenient to use and reduces the dependence on the operation space, replacing the traditional stone net basket.
[0058] During stone crushing, the flexible inner opening region or the outwardly extending skirt 212 of the negative pressure stone basket covers the target stone locally, and then the laser fiber contacts or approaches the stone S, which can continuously release laser energy. The working channel 10 of the endoscope catheter is connected to a negative pressure source, the cooling and flushing water flow in the scope sheath gap 300 enters the negative pressure stone basket inner cavity 20 through the water inlet channel 211 distributed around the lower part of the negative pressure stone basket inner opening, and the heat generated by the laser and the stone powder with a diameter of about 250 microns are continuously discharged to the outside of the body through the working channel.
[0059] After the sealing plug C is opened, the negative pressure stone basket 2 can be removed from the sheath tube 3. The negative pressure stone basket 2 can be replaced or its inner cavity can be cleaned of stone debris before being placed back into the sheath tube 3.
[0060] The "inward-retracting" irrigation fluid flow mode of this utility model "retracts" the stone powder into the negative pressure stone basket, which helps to achieve stone removal at any time and saves surgical time. In contrast, the traditional "outward-releasing" irrigation fluid flow mode scatters the stone powder everywhere, making it difficult to remove.
[0061] Because the endoscope sheath gap 300 delivers cooling and flushing water, and the transverse cross-sectional area of the endoscope sheath gap 300 is larger than the transverse cross-sectional area of the endoscope catheter working channel 10, the water supply capacity is superior. By setting a safe irrigation pressure, such as setting a maximum irrigation pressure below 30 mmHg, the flow rate is adjusted by negative pressure, which completely eliminates the risk of high pressure in laser lithotripsy, eliminates the need for pressure monitoring, and greatly saves surgical costs.
[0062] Because the transverse cross-sectional area of the sheath gap 300 is larger than the transverse cross-sectional area of the working channel 10 of the endoscope catheter, the water supply capacity is sufficient. A smaller diameter sheath 3 can be selected to be used with the endoscope catheter 1, which significantly reduces the damage of the sheath 3 to the urinary tract.
[0063] Example 2:
[0064] like Figures 2A-2C As shown, the biggest difference from Example 1 is that, in order to improve the cooling and flushing efficiency of the water flow, the water inlet channel 211 is oriented towards the opening 201 inside the negative pressure stone basket, thereby inducing the water flow to be directed towards the opening 201 inside the negative pressure stone basket. That is, the position of the inner opening 2111 of the water inlet channel is closer to the opening 201 inside the negative pressure stone basket than the position of the outer opening 2112 of the water inlet channel, so that the water flow direction is directed towards or closer to the stone fragmentation position of the laser fiber L.
[0065] Multiple water inlet channels 211 are distributed around the outward-spreading skirt 212 to form a double-ring water inlet, increasing the total area of the water inlet and ensuring smooth water flow.
[0066] like Figure 2B As shown, another type of water inlet structure is that the outward-spreading skirt 212 is provided with multiple water inlet gaps 2120. The multiple water inlet gaps 2120 are distributed around the circumference of the outward-spreading skirt 212, which increases the total area of the water inlet while also preventing the stone powder S1 from escaping outward.
[0067] Figure 2C This shows a structure where the thickness of the outward-spreading skirt 212 is lower than the thickness of the main body of the negative pressure stone basket 2. This makes it easier for the outward-spreading skirt 212 to deform when it is close to the stone S, and better allows the opening 201 inside the negative pressure stone basket to be blocked by the stone S in the reverse direction, thus preventing the escape of the stone powder S1 (figure omitted).
[0068] Example 3:
[0069] As shown in Figure 3A , the water inlet channel 211 of the negative pressure stone basket 2 is provided with a continuous or intermittent weak zone 213 distributed circumferentially, and in this example, the weak zone 213 is a groove type. There is one circumferential groove type weak zone 213 on each of the inner and outer surfaces of the negative pressure stone basket 2. Figure 3B As shown in , the stone S is pressed against the inner opening 201 region of the negative pressure stone basket 2, and the inner opening 201 region of the negative pressure stone basket 2 deforms outward along the weak zone 213. The communication state of the water inlet channel 211 and the negative pressure stone basket inner cavity 20 is blocked by the stone S, and the negative pressure of the negative pressure stone basket inner cavity 20 can directly act on the stone S without being weakened by the water inlet channel 211, which is beneficial to the adsorption and movement of the stone S.
[0070] Figure 3C Another structure is shown, in which the upper part of the negative pressure stone basket containing part 21 is in a folded state, and the upper part 214 of the folded negative pressure stone basket containing part is provided with circumferentially distributed water inlet channels 211. In use, the stone S is first adsorbed and moved, and then the folded region 214 is unfolded to expose the circumferentially distributed multiple water inlet channels 211 during laser lithotripsy.
[0071] Example 4:
[0072] As shown in Figure 4A , in order to prevent the large stone debris S2 generated during the lithotripsy process from blocking the working channel inner opening 101, this example also includes a sheet-shaped transparent isolation body 215 located in the negative pressure stone basket containing part inner cavity 210. The isolation body 215 separates the negative pressure stone basket containing part inner cavity 210 into a negative pressure stone basket containing part upper cavity 2101 and a negative pressure stone basket containing part lower cavity 2102. The isolation body 215 is provided with a fiber hole 215L for the light fiber L to pass through and multiple interception holes 2150. The cross-sectional area of each interception hole 2150 is smaller than the surface area of the working channel inner opening 101 of the matching endoscope catheter. The large volume of stone debris S2 generated during laser lithotripsy, which is about 2 mm in diameter, can be retained in the negative pressure stone basket containing part upper cavity 2101 and removed from the body once and quickly, greatly saving the operation time.
[0073] As shown in Figure 4B , Figure 4C , in order to better guide and stabilize the work of the laser fiber L, the fiber hole 215L also extends a fiber guide tube 2151L. The fiber guide tube 2151L of this example is in a straight shape, and the laser fiber L extends out of the fiber guide tube upper opening 2152L.
[0074] Example 5:
[0075] As shown in Figure 5AAs shown, considering the clinical situation of the stone S position is more biased, the negative pressure stone basket opening 201 is difficult to fully contact and block the stone S, and it is also difficult to move the stone S by negative pressure, one of the solutions is to make the negative pressure stone basket opening 201 to be inclined to one side or bent to one side (such as Figure 5B ), which helps to fully contact and adsorb the stone S with the position deviated.
[0076] In order to make the laser fiber L bend to the stone S with the position deviated, as shown in Figure 5C , the fiber guide tube 2151L is curved, and the curved fiber guide tube 2151L can bend the fiber L, which is more easy to touch the stone S located on the curved side.
[0077] The negative pressure stone basket and the negative pressure stone basket integrated endoscope catheter of the utility model make the urinary system laser lithotripsy operation upgrade from intermittent laser release to continuous operation, and the stone powder is continuously removed, the average operation time is shortened by 20%-50% in the external simulation, and the high temperature and high pressure risk during the operation is completely eliminated.
[0078] The negative pressure stone basket and the negative pressure stone basket integrated endoscope catheter of the utility model can also be used for removing the stones, blood clots, secretions and pathological tissues in the biliary tract or other natural cavities.
Claims
1. A negative pressure calculus basket (2), the main body is cylindrical, the cylindrical negative pressure calculus basket inner cavity (20) is provided with a negative pressure calculus basket outer opening (202) and a negative pressure calculus basket inner opening (201), the negative pressure calculus basket outer opening (202) and the negative pressure calculus basket connecting part (22) are sleeved on the area adjacent to the top end (111) of the head (11) of the endoscope catheter (1), the negative pressure calculus basket containing part (21) projects out of the top end (111) of the endoscope catheter head, the negative pressure calculus basket inner opening (201) is the external opening of the negative pressure calculus basket containing part inner cavity (210), the exploring assembly (112) of the top end (111) of the endoscope catheter (1) and the inner opening (101) of the working channel (10) of the endoscope catheter (1) are located at the bottom of the negative pressure calculus basket containing part inner cavity (210), characterized in that: The negative pressure stone basket inner opening (201) is adjacent to a plurality of water inlet channels (211) which are distributed around the negative pressure stone basket inner opening (201). Water flow can enter the water inlet channel (211) through the water inlet channel outer opening (2112) due to the negative pressure suction of the negative pressure stone basket containing portion inner cavity (210), and then enter the negative pressure stone basket containing portion inner cavity (210) through the water inlet channel inner opening (2111). During laser lithotripsy, water enters the mirror sheath gap (300) between the sheath tube (3) and the endoscope catheter (1). The endoscope catheter working channel (10) is connected to a negative pressure, and the negative pressure stone basket inner opening (201) is close to or tightly attached to the target stone (S). The optical fiber (L) is stretched out from the endoscope catheter working channel inner opening (101) to touch or be adjacent to the target stone (S) to release energy to break the stone (S). Water flows continuously into the negative pressure stone basket containing portion inner cavity (210) through the water inlet channel (211) due to the negative pressure suction source, and the stone powder (S1) and the heat energy generated by the laser are discharged to the outside of the body through the endoscope catheter working channel (10) along with the water flow.
2. The negative pressure stone basket (2) according to claim 1, characterized in that: The negative pressure stone basket inner opening (201) is provided with an outward skirt (212), and the surface area of the negative pressure stone basket inner opening (201) is greater than the average transverse cross-sectional area of the negative pressure stone basket containing portion inner cavity (210).
3. The negative pressure stone basket (2) according to claim 1, characterized in that: The negative pressure stone basket inner opening (201) is provided with an outward skirt (212), and the plurality of water inlet channels (211) are distributed around the outward skirt (212), and / or the outward skirt (212) is provided with a plurality of water inlet notches (2120) which are distributed around the outward skirt (212).
4. The negative pressure stone basket (2) according to claim 1, characterized in that: The water inlet channel (211) is directed towards the negative pressure stone basket inner opening (201), that is, the water inlet channel inner opening (2111) is closer to the negative pressure stone basket inner opening (201) than the water inlet channel outer opening (2112), so that the water flow is closer to the stone breaking position of the laser optical fiber (L).
5. The negative pressure stone basket (2) according to claim 1, characterized in that: The negative pressure stone basket (2) is provided with a plurality of water inlet channels (211) below the negative pressure stone basket (2), and the plurality of water inlet channels (211) are distributed around the negative pressure stone basket (2).
6. The negative pressure stone basket (2) according to claim 1, characterized in that: The upper part of the negative pressure stone basket containing portion (21) is in a folded state, and the upper part of the folded negative pressure stone basket containing portion (214) is provided with a plurality of water inlet channels (211) which are distributed around the negative pressure stone basket containing portion (21).
7. The negative pressure stone basket (2) according to claim 1, characterized in that: It also includes a sheet-shaped transparent separator (215) located in the negative pressure stone basket containing portion inner cavity (210), which separates the negative pressure stone basket containing portion inner cavity (210) into a negative pressure stone basket containing portion upper cavity (2101) and a negative pressure stone basket containing portion lower cavity (2102). The separator (215) is provided with an optical fiber hole (215L) for the optical fiber (L) to pass through and a plurality of interception holes (2150), and the cross-sectional area of each interception hole (2150) is smaller than the surface area of the matching endoscope catheter working channel inner opening (101).
8. The negative pressure stone basket (2) according to claim 7, characterized in that: The optical fiber hole (215L) also extends out an optical fiber guide tube (2151L), which is curved or straight.
9. The negative pressure stone basket (2) according to claim 1, characterized in that: The negative pressure calculus basket inner opening (201) is inclined to one side or curved to one side.
10. Negative pressure stone basket integrated endoscopic catheter (1) characterized by: The endoscope catheter (1) head (11) top end (111) part is pre-installed with the negative pressure calculus basket (2) as claimed in claims 1-9.