Percutaneous kidney minimally invasive expansion device

Abstract

The utility model provides a percutaneous kidney minimally invasive expansion device. The percutaneous kidney minimally invasive expansion device comprises an expansion sheathing canal and an expansion assembly arranged in the expansion sheathing canal. The expansion sheath tube comprises a variable-diameter section and an equal-diameter section, the variable-diameter section is located at the first end of the expansion sheath tube, the variable-diameter section can deform and expand in the radial direction, and the outer diameter of the equal-diameter section is kept unchanged; the expansion assembly comprises an expansion rod, a fixed seat and a rotating seat. Radial expansion can be directly carried out on the variable-diameter section of the expansion sheath tube through the expansion rod in the expansion assembly, and the defects that due to the fact that dilators of different specifications are sequentially arranged for expansion, operation efficiency is reduced, operation channels are lost, kidney parenchyma is prone to being torn due to repeated expansion, and great blood vessels are damaged are overcome. Meanwhile, through the arrangement of the rotating seat, the fixed seat and the like, the expansion rod can be switched to be unfolded or folded, and the operation is very convenient, fast and reliable.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of percutaneous nephrolithotomy, especially to a percutaneous nephrolithotomy dilation device. BACKGROUND

[0002] Percutaneous nephrolithotomy is a procedure that establishes a channel from the skin to the kidney in the waist, inserts a nephroscope into the kidney through the channel, and uses laser, ultrasound, and other stone crushing tools to crush and remove kidney stones. The most critical step in percutaneous nephrolithotomy is the establishment of a percutaneous nephrolithotomy channel, which directly affects the success of the operation. Currently, puncture channel dilation mostly uses puncture components, and some use balloon dilation. Puncture components are the most widely used. Some dilation devices in the prior art can dilate and establish a channel.

[0003] For example, a percutaneous nephrolithotomy dilation kit (publication number CN220442688U) in the prior art includes a dilation sheath and multiple dilators. The dilation sheath has a circumferentially expandable expandable section. The dilators have expansion sections with increasing diameters. The expansion sections of the dilators are inserted into the dilation sheath one by one, and the expansion sections drive the expandable section to expand circumferentially to establish a surgical channel. This scheme uses a dilation sheath with an expandable section and multiple dilators to expand the expandable section circumferentially to establish a surgical channel, meeting the needs of the operation.

[0004] However, this method involves multiple dilations with different types of dilators, which causes relatively large damage to the kidney, has the risk of channel loss during dilation, and may damage larger blood vessels, so further improvement is needed. UTILITY MODEL CONTENT

[0005] The utility model aims to provide a scheme that can directly adjust the dilation degree of the dilation sheath without the need for multiple insertions of different types of dilators to address the deficiencies in the background technology.

[0006] In order to achieve the above object, the utility model provides a kind of percutaneous kidney minimally invasive dilation device, including dilation sheath and the dilation assembly being arranged in the dilation sheath;The dilation sheath includes variable diameter section and equal diameter section, the variable diameter section is located at the first end of the dilation sheath, the variable diameter section can be deformed and expand along radial direction, and the equal diameter section keeps constant in outer diameter;The dilation assembly includes expansion rod, fixed seat and rotating seat, the fixed seat and the rotating seat are both arranged in the equal diameter section, the expansion rod is provided with multiple, the first end of the expansion rod extends to the variable diameter section, the second end of the expansion rod is movably connected with the fixed seat and the rotating seat, the expansion rod is arranged in parallel with the central axis of the dilation sheath, and when the rotating seat rotates relative to the fixed seat, the distance between the expansion rod and the central axis of the dilation sheath can be increased or reduced.

[0007] Further, the fixed seat is provided with a first guide groove, the rotating seat is provided with a second guide groove, the first guide groove and the second guide groove are both arranged one-to-one corresponding to the expansion rod, the second end of the expansion rod is simultaneously inserted into the corresponding first guide groove and second guide groove and movably connected, the first guide groove is arranged along the radial direction of the dilation sheath, and the second guide groove has an inclination angle relative to the radial direction of the dilation sheath.

[0008] Further, the central positions of the fixed seat and the rotating seat are both provided with through holes, the first guide groove and the second guide groove are both located at the outer ring position of the through hole and are separated from the through hole.

[0009] Further, the expansion rod is provided with eight, and is annularly and symmetrically distributed relative to the central axis of the dilation sheath, the first guide groove is annularly and symmetrically distributed relative to the central axis of the dilation sheath, and the second guide groove is rotationally and symmetrically distributed relative to the central axis of the dilation sheath.

[0010] Further, a predetermined spacing is provided between the fixed seat and the rotating seat.

[0011] Further, the expansion rod is provided with a first limiting block and a second limiting block, the first limiting block is located at the first side of the fixed seat, and the second limiting block is located at the second side of the rotating seat.

[0012] Further, a connecting pipe that can relatively rotate is arranged inside the equal diameter section, the first end of the connecting pipe is fixedly connected with the rotating seat, and the second end of the connecting pipe extends to the outside of the second end of the dilation sheath.

[0013] Further, the second end of the connecting pipe is provided with a hand wheel, and the outer surface of the hand wheel is provided with anti-skid lines.

[0014] The above scheme of the utility model has the following beneficial effects:

[0015] The percutaneous kidney minimally invasive dilation device provided by the utility model can directly radially dilate the variable diameter section of the dilation sheath tube through the dilation rod in the dilation assembly, avoids the use of dilation devices of different specifications to be sequentially placed for dilation, reduces the operation efficiency, reduces the risk of operation channel loss, and reduces the risk of tearing the kidney parenchyma and damaging large blood vessels caused by multiple dilations, significantly improves the percutaneous kidney puncture operation quality, and through the setting of the rotating seat and the fixing seat, the dilation rod is also very convenient to switch and control when being unfolded or folded;

[0016] Other beneficial effects of the utility model will be described in detail in the following specific embodiment part. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a whole structure schematic view of the utility model;

[0018] Figure 2 It is an inside structure schematic view of the dilation sheath tube of the utility model;

[0019] Figure 3 It is a dilation assembly schematic view of the utility model;

[0020] Figure 4 It is a rotating seat schematic view of the utility model;

[0021] Figure 5 It is a dilation rod unfolded schematic view of the utility model.

[0022] Reference signs:

[0023] 1, dilation sheath tube; 2, dilation rod; 3, fixing seat; 4, rotating seat; 5, first guide groove; 6, second guide groove; 7, through hole; 8, first limiting block; 9, second limiting block; 10, connecting pipe; 11, hand wheel. DETAILED DESCRIPTION

[0024] In order to make the technical problems, technical schemes and advantages of the utility model clearer, the following will be described in detail in combination with the drawings and specific embodiments. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor belong to the protection scope of the utility model. In addition, the technical features involved in the different embodiments of the utility model described below can be combined with each other as long as they do not conflict with each other.

[0025] In the description of the utility model, it needs to explain, the term "center", "upper", "lower", "left", "right", "vertical", "horizontal", "internal", "external" and so on indicate the orientation or position relation is based on the orientation or position relation shown in the drawing, only for the convenience of describing the utility model and simplifying the description, and cannot indicate or imply that the indicated device or element must have a particular orientation, a particular orientation and operation, therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0026] In the description of the utility model, it needs to explain, unless otherwise expressly provided and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be locking connection, or detachable connection, or integrally connected, it can be mechanical connection, or electrical connection, it can be directly connected, or indirectly connected through intermediate medium, it can be the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0027] As Figure 1 , Figure 2 The embodiment of the utility model provides a kind of percutaneous renal minimally invasive dilatation device, including dilatation sheath tube 1 and the dilatation assembly being arranged in dilatation sheath tube 1. Wherein, dilatation sheath tube 1 includes variable diameter section and equal diameter section, variable diameter section is located at the first end (puncture end) of dilatation sheath tube 1, it is set as the form of a certain taper and can be deformed along radial expansion, it can be guaranteed by the material used. The outer diameter of equal diameter section remains unchanged during the operation process, and is equal to the maximum inner diameter of variable diameter section. That is, the outer surface of the entire dilatation sheath tube 1 adopts relatively smooth transition.

[0028] It has been mentioned in the background art that the outer diameter of the variable diameter section needs to be gradually enlarged during percutaneous nephrolithotomy surgery, therefore the dilatation assembly in the embodiment includes dilatation rod 2, fixed seat 3 and rotating seat 4. Wherein, fixed seat 3 and rotating seat 4 are both arranged in the equal diameter section of dilatation sheath tube 1, preferably close to the dilatation section. Multiple dilatation rods 2 are arranged, the first end of dilatation rod 2 extends to the variable diameter section, and the second end is movably connected with fixed seat 3 and rotating seat 4. Wherein, dilatation rod 2 is arranged in parallel with the central axis of dilatation sheath tube 1, when rotating seat 4 rotates relative to fixed seat 3, the distance between dilatation rod 2 and the central axis of dilatation sheath tube 1 can be increased or decreased, so that dilatation rod 2 expands to contact the variable diameter section and deforms to expand radially, or dilatation rod 2 is retracted, and the variable diameter section elastically resets to contract radially.

[0029] Meanwhile as Figure 3 , Figure 4 and Figure 5As shown, the fixed seat 3 is provided with a first guide slot 5, and the rotating seat 4 is provided with a second guide slot 6. The first guide slot 5 and the second guide slot 6 are both provided in one-to-one correspondence with the expansion rods 2, the second ends of the expansion rods 2 are inserted into the corresponding first guide slot 5 and second guide slot 6, and the expansion rods 2 can move along the first guide slot 5 and the second guide slot 6. In addition, the first guide slot 5 is arranged along the radial direction of the expansion sheath 1, and the second guide slot 6 has an inclination angle relative to the radial direction of the expansion sheath 1. Therefore, when the rotating seat 4 rotates relative to the fixed seat 3, the expansion rods 2 are simultaneously limited by the first guide slot 5 and the second guide slot 6, and will move along the first guide slot 5, that is, move along the radial direction of the expansion sheath 1, so as to change the distance relative to the central axis of the expansion sheath 1, so that the diameter of the variable diameter section expands or shrinks. For details, please refer to the description of the first embodiment. Figure 5 .

[0030] As described above, by arranging the expansion assembly, the rotating seat 4 can be directly adjusted during the percutaneous renal puncture process, so that the expansion sheath 1 directly expands radially, without the need to rely on different specifications of dilators to be sequentially inserted for expansion, thereby avoiding a series of problems caused by multiple expansions.

[0031] It should be noted that the center positions of the fixed seat 3 and the rotating seat 4 in the embodiment are both provided with through holes 7, and the first guide slot 5 and the second guide slot 6 are both located at the outer ring position of the through hole 7 and do not communicate with the through hole 7. The through hole 7 is used for the passage of the guide wire, so as to be guided by the guide wire during the percutaneous renal puncture process, thereby avoiding the problem that the guide wire cannot be guided or the guide wire enters the two guide slots. Since the expansion rods 2 are limited by the first guide slot 5 and the second guide slot 6, the expansion rods 2 will not be retracted to hinder the passage of the guide wire.

[0032] As a preferred embodiment, the expansion rods 2 are arranged in eight in the embodiment, and are arranged in annular symmetry relative to the central axis of the expansion sheath 1, and the first guide slot 5 is also arranged in annular symmetry, and the second guide slot 6 is not arranged along the radial direction, so it can be regarded as rotational symmetry.

[0033] It should be noted that, in order to avoid the expansion rods 2 from being inclined and to keep parallel to the central axis of the expansion sheath 1, the fixed seat 3 and the rotating seat 4 are arranged with a certain spacing in the embodiment, so that the expansion rods 2 are kept parallel by means of two-point limiting. In addition, the first guide slot 5 and the second guide slot 6 are both arranged with a certain depth in the embodiment, that is, the fixed seat 3 and the rotating seat 4 are arranged with a certain thickness, so as to further ensure that the expansion rods 2 are parallel. In addition, in order to avoid the axial displacement of the expansion rods 2, the first limiting block 8 and the second limiting block 9 are arranged on the expansion rods 2 in the embodiment, the first limiting block 8 is located on the first side of the fixed seat 3, the second limiting block 9 is located on the second side of the rotating seat 4, and the sizes of the first limiting block 8 and the second limiting block 9 are both greater than the width of the corresponding guide slot, so as to limit the axial displacement of the expansion rods 2. The limiting block can be in the form of a nut, and the expansion rods 2 are provided with threads, etc.

[0034] Since the rotating seat 4 is close to the first end of the expansion sheath tube 1, in order to facilitate the rotation control of the rotating seat 4, a connecting pipe 10 is further arranged in the embodiment, the connecting pipe 10 is located in the constant diameter section, the first end of the connecting pipe 10 is fixedly connected with the rotating seat 4, and the second end of the connecting pipe 10 extends to the outside of the second end of the expansion sheath tube 1, and a hand wheel 11 or the like can be further arranged to facilitate the rotation of the connecting pipe 10 and the rotating seat 4 by hand holding the hand wheel 11. The surface of the hand wheel 11 can be further provided with anti-skid lines or the like.

[0035] It should be noted that, in order to enable the rotating seat 4 to be kept after being rotated to a preset position, a bearing with damping or other rotating support structure can be arranged at a preset position of the connecting pipe 10 or between the rotating seat 4 and the expansion sheath tube in the embodiment, and a person skilled in the art can flexibly select based on actual size, cost and the like.

[0036] In summary, the percutaneous kidney minimally invasive expansion device provided in the embodiment can directly expand the variable diameter section of the expansion sheath tube 1 through the expansion rod 2 in the expansion assembly, avoids the reduction of surgical efficiency, the risk of loss of surgical channel, and the disadvantages of easy tearing of kidney parenchyma and damage to large blood vessels caused by placing expansion devices of different specifications in sequence, significantly improves the quality of percutaneous kidney puncture surgery, and through the arrangement of the rotating seat 4, the fixed seat 3 and the like, the expansion and contraction switching and control of the expansion rod 2 are also very convenient and reliable.

[0037] The technical features of the above embodiments can be combined arbitrarily, and in order to make the description simple, all possible combinations of the technical features in the above embodiments are not described, but as long as the combination of the technical features does not exist contradictory, it should be considered as the scope of the description.

[0038] The above embodiments only express several implementation manners of the application, the description is more specific and detailed, but it should not be understood as a limitation on the scope of the application. It should be noted that, for those skilled in the art, without departing from the concept of the application, a number of modifications and improvements can be made, which are all within the protection scope of the application. Therefore, the protection scope of the application should be subject to the appended claims.

Claims

1. A percutaneous renal minimally invasive dilation device, characterized by, The dilating sheath comprises a dilating sheath and a dilating assembly arranged in the dilating sheath. The dilating sheath comprises a variable diameter section and a constant diameter section, the variable diameter section is located at the first end of the dilating sheath, the variable diameter section can be deformed to expand radially, and the outer diameter of the constant diameter section remains unchanged. The dilating assembly comprises a dilating rod, a fixed seat and a rotating seat, the fixed seat and the rotating seat are arranged in the constant diameter section, the dilating rod is provided in plurality, the first end of the dilating rod extends to the variable diameter section, the second end of the dilating rod is movably connected with the fixed seat and the rotating seat, the dilating rod is arranged in parallel with the central axis of the dilating sheath, and when the rotating seat rotates relative to the fixed seat, the distance between the dilating rod and the central axis of the dilating sheath can be increased or decreased.

2. The percutaneous renal minimally invasive dilation device according to claim 1, wherein, The fixed seat is provided with a first guide groove, the rotating seat is provided with a second guide groove, the first guide groove and the second guide groove are arranged one-to-one corresponding to the dilating rod, the second end of the dilating rod is simultaneously inserted into the corresponding first guide groove and second guide groove and movably connected, the first guide groove is arranged along the radial direction of the dilating sheath, and the second guide groove has an inclination angle relative to the radial direction of the dilating sheath.

3. The percutaneous renal minimally invasive dilation device, according to claim 2, wherein, The central positions of the fixed seat and the rotating seat are provided with through holes, the first guide groove and the second guide groove are located at the outer ring positions of the through holes and are separated from the through holes.

4. The percutaneous renal minimally invasive dilation device, according to claim 2, wherein, The dilating rod is provided in eight and is arranged in annular symmetry relative to the central axis of the dilating sheath, the first guide groove is arranged in annular symmetry relative to the central axis of the dilating sheath, and the second guide groove is arranged in rotational symmetry relative to the central axis of the dilating sheath.

5. The percutaneous renal minimally invasive dilation device, as recited in claim 1, wherein, A predetermined distance is arranged between the fixed seat and the rotating seat.

6. The percutaneous renal minimally invasive dilation device, according to claim 1, wherein, The dilating rod is provided with a first limiting block and a second limiting block, the first limiting block is located at the first side of the fixed seat, and the second limiting block is located at the second side of the rotating seat.

7. The percutaneous renal minimally invasive dilation device, according to claim 1, wherein, A rotatable connecting pipe is arranged inside the constant diameter section, the first end of the connecting pipe is fixedly connected with the rotating seat, and the second end of the connecting pipe extends to the outside of the second end of the dilating sheath.

8. The percutaneous renal minimally invasive dilation device, according to claim 7, wherein, A hand wheel is arranged at the second end of the connecting pipe, and an anti-skid pattern is arranged on the outer surface of the hand wheel.

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