CN111603224A - A visual subassembly and percutaneous kidney puncture system for percutaneous kidney puncture - Google Patents

Abstract

The present application provides a visualization assembly for percutaneous renal puncture, comprising: a hollow inner sheath; a COMS element disposed in the inner sheath for acquiring images; and a plurality of optical fibers arranged around the COMS element and arranged in the inner sheath, wherein the plurality of optical fibers are used for guiding light generated by an external light source to the periphery of the COMS element. In addition, the present application also provides a percutaneous renal puncture system including the visualization assembly. The visualization component for percutaneous kidney puncture and the percutaneous kidney puncture system provided by the invention adopt the digital CMOS element to collect images and combine the illumination optical fiber, so that the images formed in the whole puncture process are clearer, and the tissue and organ identification and resolution of an operator are more accurate. In addition, the invention does not need a fiber-optic camera converter, the cost of the COMS element is far lower than the cost of the existing fiber-optic imaging, so that the visualization component can become a disposable consumable, and the cross infection caused by repeated use is avoided.

Description

A visual subassembly and percutaneous kidney puncture system for percutaneous kidney puncture

Technical Field

The invention relates to the field of medical instruments, in particular to a visualization assembly for percutaneous nephrolithotomy and a percutaneous nephrolithotomy system.

Background

The traditional percutaneous renal puncture is conducted under the guidance of X-ray or B-ultrasonic, and has the disadvantages of poor positioning accuracy, low success rate and high complication rate. In addition, the dilation of the surgical channel during the puncturing process is a blind operation, that is, the use of imaging equipment such as X-ray or B-ultrasonic cannot completely ensure the correct position of the dilator in each dilation operation, which results in a certain loss rate of the surgical channel during the dilation process, and even the possibility of large bleeding due to the wrong dilation position. Meanwhile, imaging equipment such as X-ray and the like can bring potential radioactive hazards to patients and operators.

At present, the percutaneous nephroscopy of visual puncture is the latest worldwide minimally invasive urinary surgery type, and the basic working principle is that an imaging optical fiber is arranged in a puncture needle, an operator establishes a puncture channel between a body surface projection of a patient suffering from kidney and a target renal calyx by using the puncture needle, keeps a guide wire, selectively expands the percutaneous renal channel according to the operation requirement, and finally aims to keep a proper working channel so as to perform subsequent operation. The visual percutaneous nephroscopy has the greatest advantage of being visible in the whole process, so that an operator can be ensured to operate under the direct vision, and the damage to renal vessels and non-renal organs caused by errors is avoided.

However, the scheme of transmitting images by using optical fibers still has many disadvantages in the clinical application process. For example, in a light-guiding bundle of thousands of fibers, each fiber is an independent transmission unit, each fiber carrying a portion of an image for an eyepiece. Because of this, the small space between the optical fibers becomes the image transmission gap, so that the optical fiber image data often appears as a circular honeycomb grid picture (as shown in fig. 1), and even though the image processor can optimize the original image, the image displayed by the display is not clear enough. Particularly, if bleeding occurs during the puncture process, the displayed image is further blurred, and the subsequent operation of the operation is affected. In addition, the manufacturing process of the light guide bundle consisting of thousands of optical fibers in the puncture needle is complex and expensive, so the puncture needle must be sterilized and reused (cannot be used up and disposed of like disposable medical supplies), thereby increasing the risk of cross-infection. Moreover, due to the design problem of the puncture needle, only the outer sheath of the puncture needle can be reserved after the percutaneous kidney puncture is successful, the visible optical fiber is taken away, the expansion operation is not reliably monitored if the operation channel needs to be expanded subsequently, and the operation complication rate is increased inevitably due to blind channel expansion.

Based on the shortcomings of the prior art, there is a need for a new percutaneous nephroscope system for urology.

Disclosure of Invention

In view of the problems with the background art, the present invention provides a visualization assembly for percutaneous renal puncture, comprising:

a hollow inner sheath;

a COMS element disposed in the inner sheath for acquiring images; and

a plurality of optical fibers disposed around the COMS element disposed in the inner sheath, the plurality of optical fibers for conducting light generated by an external light source to the surroundings of the COMS element.

The visualization component for percutaneous kidney puncture provided by the invention adopts a digital CMOS element to collect images and combines with the lighting optical fiber, so that the images formed in the whole puncture process are clearer, and the tissue and organ identification and resolution of an operator are more accurate. In addition, the optical fiber image pickup converter is not needed, the cost of the COMS element is far lower than that of the existing optical fiber image pickup device, so that the visualization component for percutaneous renal puncture can be a disposable consumable, and the cross infection caused by repeated use is avoided.

In some embodiments of the invention, the cmos elements are square in transverse cross-section; the inner sheath is annular in transverse cross-section so that it can circumscribe the COMS element; the plurality of optical fibers are for filling a gap formed between the inner sheath and the COMS element.

In some embodiments of the present invention, the square transverse cross-section of the COMS elements has a diagonal length of 1.43 mm; the thickness of the sheath wall of the inner sheath is 0.1 mm.

The LED light source of the visualization component for percutaneous kidney puncture is positioned on the host, and a plurality of beams of optical fibers conduct the light source to the periphery of the COMS element, so that the problem that the diameter of the inner sheath has to be increased due to the fact that the LED light source is directly arranged in the inner sheath is avoided, the visualization component for percutaneous kidney puncture can be placed in a standard kidney puncture sheath, and the visualization component for percutaneous kidney puncture accords with a minimally invasive design core concept.

In some embodiments of the invention, the COMS element is disposed at a head end of the inner sheath; the plurality of optical fibers extending along a length of the inner sheath; the visualization assembly for percutaneous renal puncture further comprises: an image transmission line disposed in the inner sheath and extending along a length of the inner sheath, the image transmission line being connected to the COMS element; the bundles of optical fibers and the image transmission line are led out from the tail end of the inner sheath and are wrapped by an insulating material to form a cable for connecting with external equipment.

The multiple bundles of optical fibers and the image transmission line in the visualization assembly for percutaneous renal puncture are integrated into a cable, so that the wiring can be simplified, and the cable can be used for temporarily suspending subsequent surgical products, such as a fascia dilator and an outer sheath.

In addition, the present invention provides a percutaneous renal puncture system comprising:

a hollow puncture sheath with a puncture tip; and

any one of the visualization assemblies for percutaneous renal puncture described above that can be disposed on the puncture sheath;

the COMS element is capable of acquiring a full image of the procedure of percutaneously puncturing the kidney with the puncture sheath.

The percutaneous kidney puncture system provided by the invention can be directly used by matching a COMS element with a B-ultrasonic wave, and does not need to adopt X-rays like the prior art, so that potential radioactive hazards are reduced.

In some embodiments of the invention, a roughened surface is formed on the outer wall of the puncture sheath adjacent the puncture tip.

In some embodiments of the invention, the inner sheath and the puncture sheath are spaced apart such that a first channel is formed along a length of the puncture sheath, the percutaneous renal puncture system further comprising: a three-way connector having a three-way port, wherein a first port is adapted to removably connect with the puncture sheath, a second port is adapted to removably connect with the cable, and a third port is adapted to removably connect with an external liquid storage device to enable liquid to flow into the first passageway via the third port.

In some embodiments of the invention, the inner sheath is offset relative to the piercing sheath such that one side of the inner sheath and the piercing sheath conform and a first channel is formed between the inner sheath and the piercing sheath on the other side.

In the percutaneous renal puncture system according to the present invention, since the inner sheath is offset from the puncture sheath, when the first channel is used as a passage for a cleaning solution (saline), the cleaning solution (saline) can be flushed from one side of the puncture sheath having the first channel to the other side (i.e., unidirectional flushing) to avoid the influence of blood and tissue on the image acquired by the CMOS device as much as possible.

In some embodiments of the invention, the puncture sheath and the cable have the same diameter, and the percutaneous renal puncture system further comprises: the fascia dilator is sleeved on the cable step by step, the diameter of the fascia dilator is increased step by step, the diameter of the fascia dilator at the outermost layer is equivalent to the preset expansion diameter, and the fascia dilator at the innermost layer can slide to the puncture end of the puncture sheath along the cable; and a working channel sheath disposed on the outermost fascia dilator.

The fascia dilator in the percutaneous kidney puncture system provided by the invention can also dilate a working channel (a kidney wound) under a visible condition, so that an operator can observe the whole dilation process, and the injury to blood vessels or other tissues in the kidney is avoided.

In some embodiments of the invention, the percutaneous renal puncture system comprises an outer sheath capable of fitting over the puncture sheath, wherein upon removal of the puncture sheath, a second channel is formed between the inner sheath and the outer sheath; and a four-way connector having a four-way interface, wherein the fourth interface is configured to be removably coupled to the sheath, the fifth interface is configured to be removably coupled to the cable, the sixth interface is configured to be removably coupled to an external fluid storage device to enable fluid to flow into the second channel via the sixth interface, and the seventh interface is configured to enable the laser lithotripsy fiber to enter the second channel therethrough.

Drawings

FIG. 1 is an image of a prior art transmission using optical fibers;

FIG. 2 is a transverse cross-sectional view of a visualization assembly for percutaneous renal puncture provided in accordance with an embodiment of the present invention;

FIG. 3 is a side cross-sectional view of a visualization assembly for percutaneous renal puncture provided in accordance with an embodiment of the present invention;

FIG. 4 is an image taken using a visualization assembly for percutaneous renal puncture provided by the present invention;

FIG. 5 is a transverse cross-sectional view of a percutaneous renal puncture system (inner sheath and puncture sheath combination) provided in accordance with an embodiment of the present invention;

FIG. 6 is a side cross-sectional view of a percutaneous renal puncture system (inner sheath and puncture sheath combination) provided in accordance with an embodiment of the present invention;

FIG. 7 is a side cross-sectional view of a percutaneous renal puncture system (inner sheath and outer sheath combination) provided in accordance with an embodiment of the present invention;

figure 8 is a side cross-sectional view of a percutaneous renal puncture system (cable and fascia dilator combination) provided in accordance with an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the invention to those skilled in the art.

The invention aims to provide a method which can accurately identify tissue structures in a kidney in the process of percutaneous (skin) kidney puncture, channel establishment and/or channel expansion under the co-guidance of B ultrasonic and digital transmission processing images, and is convenient for the fine operation of subsequent operations.

First, as shown in fig. 2 and 3, an embodiment of the present invention provides a visualization assembly 1 for percutaneous renal puncture, comprising a hollow inner sheath 11, a COMS element 12, and a plurality of bundles of optical fibers 13. In particular, a COMS element 12 for acquiring images is arranged in a hollow inner sheath 11 and is connected to an external display device (for example a computer with a display). Multiple optical fibers 13 are disposed around the cmos element 12, and the multiple optical fibers 13 can transmit light generated by an external light source (e.g., an LED) to the surroundings of the cmos element 12 to fill light for the cmos element 12 to acquire an image.

Further, referring to fig. 2, the COMS element 12 has a square transverse cross-section, the inner sheath 11 has a circular transverse cross-section, and the inner sheath 11 just circumscribes the COMS element 12. The bundles of optical fibers 13 are intended to fill the approximately arcuate gap formed between the inner sheath 11 and the COMS element 12 (the number of specific optical fibers is not shown in fig. 2, but is indicated by the hatched area).

The kidney is an important organ of a human body and plays a role in excreting various substances such as water, inorganic salt, toxin and the like, and the kidney puncture requirement is different from the puncture of other tissues and organs: the kidney is fragile in nature and extremely rich in blood circulation, the renal cortex necessary for puncture is distributed over the great vessels, and the importance of minimally invasive intervention safety puncture is emphasized by the characteristics of various anatomies and functions.

The visualization component 1 for percutaneous renal puncture provided by the embodiment is to acquire all images during the renal puncture process, so as to prevent damage to renal tissues (especially blood vessels) or other important organs passing through, and therefore the maximum diameter of the visualization component for percutaneous renal puncture should be strictly limited.

In the present embodiment, the diagonal length of the square transverse cross-section of the COMS elements 12 is 1.43mm (4.29F). The thickness of the sheath wall of the inner sheath 11 is 0.1mm, and the material is medical 304 stainless steel. Thus, the maximum diameter of the visualization assembly 1 for percutaneous renal puncture is 1.43mm +0.1mm × 2-1.63 mm (4.89F). At the same time, as described above, bundles of optical fibers 13 for fill-in light are filled in the approximately arcuate gap formed between the inner sheath 11 and the COMS element 12, so that it does not lead to an increase in the diameter of the entire visualization assembly 1.

In this embodiment, the inner sheath 11 is in the shape of a long and narrow tube, the COMS element 12 is disposed at the head end (upper end as shown in fig. 3) of the inner sheath 11, and the plurality of optical fibers 13 extend along the length direction of the inner sheath 11 (from top to bottom as shown in fig. 3). An image transmission line 14 is connected to the COMS element 12 and extends along the length of the inner sheath 11 (in a top-down direction as shown in fig. 3). The bundles of optical fibers 13 and the image transmission line 14 are led out from the rear end (lower end as viewed in fig. 3) of the inner sheath 11, and are wrapped with an insulating, waterproof material to form a cable 15 for connection with an external device.

Referring to fig. 4, there is shown an image taken using the visualization assembly 1 for percutaneous renal puncture provided in the present embodiment, which image has a much greater definition than the image transmitted by optical fibers in the prior art shown in fig. 1.

Secondly, as shown in fig. 5 and 6, another aspect of the present invention provides a percutaneous renal puncture system 2, which comprises a puncture sheath 21 which is hollow and is provided with a puncture end 21a, and the visualization component 1 for percutaneous renal puncture which can be arranged in the puncture sheath 21. The puncture sheath 21 is located at the same end (the upper end as shown in fig. 6) as the COMS element 12 described above. Based on the above configuration, the COMS element 12 can acquire all images of the procedure of percutaneously puncturing the kidney with the puncture sheath 21, i.e. the operator percutaneously punctures the kidney with the puncture sheath 21 in a visible state, so as to avoid damaging blood vessels and other tissues. In the embodiment, the puncture sheath 21 is made of medical 304 stainless steel, the length is 250-300 mm, the cross section is annular, and the thickness is 0.115 mm. The piercing end 21a is formed as an inclined surface having an inclination angle of 20 ° to 30 °.

Further, a rough surface 21b is formed on the outer wall of the puncture sheath 21 adjacent to the puncture tip 21a, and the rough surface 21b extends 2 to 3cm in the longitudinal direction of the puncture sheath 21.

With the above configuration, the process of the puncturing end 21a puncturing the kidney percutaneously can be observed by the external display device, but the depth and direction of the puncturing end 21a punctured percutaneously after entering the human body from the skin cannot be known. The rough surface 21B can be used as a guide part of B-ultrasonic during the puncture process, thereby helping an operator to judge the depth and the direction of percutaneous puncture, and the B-ultrasonic can also display a distal organ.

As shown in connection with fig. 5, the inner sheath 11 and the puncture sheath 21 are arranged at intervals such that a first passage 22 is formed along the length direction of the puncture sheath 21. The percutaneous renal puncture system 2 also includes a three-way connector 23 having a three-way interface. Wherein the first port 231 is adapted to be detachably connected to the puncture sheath 21, the second port 232 is adapted to be detachably connected to the cable 15, and the third port 233 is adapted to be detachably connected to an external liquid storage device, so that liquid can flow into the first channel 22 via the third port 233.

Specifically, a fastening member (a threaded knob) is disposed on the first port 231, the first port 231 is sleeved on the puncture sheath 21, and the fastening member is rotated to fixedly connect the first port 231 and the puncture sheath. Similarly, the second port 232 is provided with a fastening member (a threaded knob for sleeving the second port 232 on the cable 15 and rotating the fastening member to fixedly connect the two, the three-way connector 23 and the fastening member provided thereon are made of plastic material, and preferably, a leakage-proof silica gel is filled between the first port 231 and the puncture sheath 21 and between the second port 232 and the cable 15.

With continued reference to FIG. 5, the inner sheath 11 is offset relative to the piercing sheath 21 such that one side of the inner sheath 11 is flush with the piercing sheath 21 and the other side of the inner sheath 11 and the piercing sheath 21 define therebetween the aforementioned first passage 22, the first passage 22 having a cross-section that approximates a crescent shape. The maximum width of the distance between the puncture sheath 21 and the inner sheath 11 is 0.15mm, and the diameter of the puncture sheath 21 is 1.63+0.15+0.115mm × 2 is 2.01mm (6.03F).

In operation, the operator uses the percutaneous renal puncture system 2 to perform percutaneous renal puncture, and the rough surface 21B at the front end of the puncture sheath 21 is a B-ultrasonic guide part, so that the puncture sheath penetrates into the target renal calyx under guidance. The COMS element 12 can make the operator avoid the blood vessel as much as possible in the visible state. When a hemorrhage or tissue debris occurs that obscures the COMS element 12 from its acquisition, saline may be infused through the first channel 22 to the front end of the puncture sheath 21, flushing the hemorrhage or tissue debris to ensure a clear view.

In addition, after the puncture process is completed, the operator can unscrew the fastener arranged on the second port 232, push the cable 15 forward, and then the cable 15 drives the inner sheath 11 to move forward, so that the operator can perform proper observation of the structure in the kidney.

Further, in order to limit the range of movement of the cable 15 with the inner sheath 11, a first recess or a first protrusion 231a is formed on the first interface 231, and a second recess or a second protrusion 15a complementary to the first recess or the first protrusion is formed on the cable 15. When the first recess or first projection 231a and the second recess or second projection 15a are combined with each other, the cable 15 reaches a maximum moving distance.

As shown in fig. 7, the percutaneous renal puncture system 2 further includes an outer sheath 26 capable of being sleeved on the puncture sheath 21 and a four-way connector 28 having a four-way interface. When the puncture sheath 21 is removed, a second channel 27 is formed between the inner sheath 11 and the outer sheath 26. In order to avoid the duplication of the interfaces with the three-way connector 23, the four interfaces of the four-way connector 28 are named as a fourth interface 281 to a seventh interface 284. The fourth port 281 is adapted to be detachably connected to the outer sheath 26, the fifth port 282 is adapted to be detachably connected to the cable 15, the sixth port 283 is adapted to be detachably connected to an external fluid storage device so that fluid can flow into the second channel 27 via the sixth port 283, and the seventh port 284 is adapted to allow the lithotripsy laser fiber to pass therethrough into the second channel 27. Similarly, the fourth interface 281 and the outer sheath 26, and the fifth interface 282 and the cable 15 are filled with silicone rubber which is impervious to leakage.

The cross section of the outer sheath 26 is annular and is made of medical 304 stainless steel with a thickness of 0.1 mm. The sheath 26 has a diameter of 2.21mm (6.63F) and a length of 200 to 250 mm.

In operation, when the puncture is successful, the operator detaches the three-way connector 23 without changing the combination of the inner sheath 11 and the puncture sheath 21. The outer sheath 26, which is fitted over the cable 15, is slid onto the puncture sheath 21 and then pushed into the working channel (into the puncture wound) under visualization. The stainless steel material ensures that there is less friction between the outer sheath 26 and the puncture sheath 21. After the outer sheath 26 reaches the desired position, the inner sheath 11 (containing the cable 15) and the puncture sheath 21 are withdrawn, leaving only the outer sheath 26. Further, the inner sheath 11 and the puncture sheath 21 are separated, and the inner sheath 11 is inserted back into the outer sheath 26, and the second passage 27 is actually formed at the position of the original puncture sheath 21 based on the above arrangement. The cable 15 and sheath 26 are connected by the four-way connector 28 described above.

The surgeon can insert the lithotripsy laser fiber into the second channel 27 through the seventh port 284 of the four-way connector, and then reach the inside of the kidney. When a hemorrhage or tissue fragment blocking the COMS element 12 from acquiring images occurs, saline may be infused through the second channel 27 to the front end of the inner sheath 11, flushing the hemorrhage or tissue fragment to ensure a clear view.

The embodiment is mainly suitable for percutaneous nephrostomy or percutaneous nephrolithotripsy with stones smaller than 2cm, not only ensures high frame definition of the visual field in the operation process, but also ensures the space utilization optimization (the diameter is minimum) in the inner sheath 11 and the outer sheath 26, thereby reducing the damage to the kidney structure in the puncture process.

Further, as shown in FIG. 8, embodiments of the present invention provide a percutaneous renal puncture system 2 in which the puncture sheath 21 and the cable 15 are the same diameter. The percutaneous renal puncture system 2 further includes at least one fascia dilator 24 a-24 n that can be progressively sleeved over the cable 15. The diameters of the fascia dilators 24a to 24n are gradually increased, and the diameter of the fascia dilator 24n at the outermost layer is equivalent to a preset target dilating diameter. The innermost fascia dilator 24a can be slid along the cable 15 to the piercing end 21a of the piercing sheath 21.

In operation, the kidney is again percutaneously punctured using the percutaneous renal puncture system 2 as described above, and then the fascia dilators 24 a-24 n are sequentially advanced under visualization (using the visualization assembly for percutaneous renal puncture described above) so that each of the fascia dilators 24 a-24 n is at a desired depth, gradually dilating the wound created by the puncture sheath 21 to a predetermined dilated diameter. In addition, the fascia dilator 24n on the outermost layer is provided with a working channel sheath 25, so that after the wound is dilated to a preset dilated diameter, all the fascia dilators 24a to 24n are removed, and the working channel sheath 25 is left to maintain the diameter of the wound. Finally, the outer sheath 26, which is placed over the cable 15, is slid onto the puncture sheath 21 and pushed into the working channel sheath 25 in a visible state.

The working channel sheath 25 may be made of a material that is easily torn, so that the working channel sheath 25 is torn and discarded after the outer sheath 26 is pushed into the working channel sheath 25 in a visible state.

To reduce bleeding complications during puncture and dilation, percutaneous nephropuncture and percutaneous nephrolithology have evolved from large channels (24-30F) to Standard-channels (Standard-track 24-26F), to micro-channels (Mini-track 16-18F), to ultra-small channels (ultra-track 11-13F), and finally to visualized tiny channels (Microperc 4.85F, MicroPCNL 8F). Since the maximum diameter of the nephroscope 1 provided by the present invention is 1.63mm (4.89F) and the diameter of the puncture sheath 21 is 2.01mm (6.03F), the working channel (renal wound) can be slightly expanded by using the above fascia dilators 24a to 24n, and the working channel can be maintained within the standard of the minimal channel (Microperc 4.85F, MicroPCNL 8F).

The embodiment is mainly suitable for percutaneous nephrolithotripsy with stones larger than 2cm, the expansion process is carried out in a completely visible process, the fascia dilators 24 a-24 n can be ensured to reach a proper insertion depth, the loss of a working channel is prevented, and the operation time is shortened.

Finally, it should be noted that the above examples are only used to illustrate the technical solutions of the present invention and are not limitative. Although the present invention has been described in detail with reference to the embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the spirit and scope of the invention as defined in the appended claims.

Claims (10)

1. Visualization assembly (1) for percutaneous renal puncture, characterized in that it comprises:

a hollow inner sheath (11);

a COMS element (12) disposed in the inner sheath (11) for acquiring images; and

a plurality of optical fibers (13) disposed around the COMS element (12) disposed in the inner sheath (11), the plurality of optical fibers (13) for conducting light generated by an external light source to the surroundings of the COMS element (12).

2. Visualization assembly (1) for percutaneous renal puncture according to claim 1, characterized in that:

the COMS elements (12) are square in transverse cross section;

the inner sheath (11) is annular in transverse cross-section, so that the inner sheath (11) can circumscribe the COMS element (12);

the plurality of optical fibers (13) is used for filling a gap formed between the inner sheath (11) and the COMS element (12).

3. Visualization assembly (1) for percutaneous renal puncture according to claim 2, characterized in that:

the square transverse section of the COMS element (12) has a diagonal length of 1.43 mm;

the thickness of the sheath wall of the inner sheath (11) is 0.1 mm.

4. Visualization assembly (1) for percutaneous renal puncture according to claim 1, characterized in that:

the COMS element (12) is arranged at the head end of the inner sheath (11);

the plurality of optical fibers (13) extending along the length direction of the inner sheath (11);

the visualization assembly (1) for percutaneous renal puncture further comprises:

an image transmission line (14) disposed in the inner sheath (11) and extending along a length direction of the inner sheath (11), the image transmission line (14) being connected to the COMS element (12);

the bundles of optical fibers (13) and the image transmission line (14) are led out from the tail end of the inner sheath (11) and are wrapped by an insulating material to form a cable (15) for connecting with external equipment.

5. Percutaneous renal puncture system (2), characterized in that it comprises:

a hollow puncture sheath (21) having a puncture tip (21 a); and

visualization assembly (1) for percutaneous renal puncture according to any one of claims 1 to 4, disposable within the puncture sheath (21);

the COMS element (12) is capable of acquiring a complete image of the percutaneous renal procedure with the puncture sheath (21).

6. Percutaneous renal puncture system (2) according to claim 5, wherein:

a roughened surface (21b) is formed on the outer wall of the piercing sheath (21) adjacent to the piercing end (21 a).

7. Percutaneous renal puncture system (2) according to claim 5, wherein the inner sheath (11) and the puncture sheath (21) are arranged at intervals such that a first channel (22) is formed along a length direction of the puncture sheath (21), the percutaneous renal puncture system (2) further comprising:

a three-way connector (23) having a three-way interface, wherein a first interface (231) is for detachable connection with the puncture sheath (21), a second interface (232) is for detachable connection with the cable (15), and a third interface (233) is for detachable connection with an external liquid storage device, such that liquid can flow into the first channel (22) via the third interface (233).

8. Percutaneous renal puncture system (2) according to claim 7, wherein:

the inner sheath (11) is offset relative to the puncture sheath (21) such that one side of the inner sheath (11) is flush with the puncture sheath (21) and a first channel (22) is formed between the inner sheath (11) and the puncture sheath (21) on the other side.

9. Percutaneous renal puncture system (2) according to claim 5, wherein the puncture sheath (21) and the cable (15) have the same diameter, the percutaneous renal puncture system (2) further comprising:

at least one fascia dilator (24 a-24 n) sleeved on the cable (15) step by step, the diameter of the fascia dilator (24 a-24 n) is increased step by step, the diameter of the fascia dilator (24n) at the outermost layer is equivalent to the preset expansion diameter, and the fascia dilator (24a) at the innermost layer can slide along the cable (15) to the puncture end (21a) of the puncture sheath (21); and

a working channel sheath (25) disposed over the outermost fascia dilator (24 n).

10. Percutaneous renal puncture system (2) according to any one of claims 5 to 9, comprising:

an outer sheath (26) capable of fitting over the puncture sheath (21) such that upon removal of the puncture sheath (21), a second channel (27) is formed between the inner sheath (11) and the outer sheath (26); and

a four-way connector (28) having a four-way interface, wherein a fourth interface (281) is adapted to be detachably connected to the outer sheath (26), a fifth interface (282) is adapted to be detachably connected to the cable (15), a sixth interface (283) is adapted to be detachably connected to an external fluid storage device to enable fluid to flow into the second channel (27) via the sixth interface (283), and a seventh interface (284) is adapted to enable a laser lithotripsy fiber to enter the second channel (27) therethrough.

Images