CN213075810U

CN213075810U - Operation assembly for percutaneous nephrolithotomy

Info

Publication number: CN213075810U
Application number: CN202020691074.5U
Authority: CN
Inventors: 严航; 刘洛斌; 梅志华; 郑忠伟
Original assignee: Innovex Medical Co Ltd
Current assignee: Shanghai innova Medical Instrument Co.,Ltd.
Priority date: 2020-04-29
Filing date: 2020-04-29
Publication date: 2021-04-30
Anticipated expiration: 2030-04-29

Abstract

The utility model provides a surgical assembly for percutaneous nephrolithotomy, include: the sheath tube is fixedly connected with the sheath tube joint, the sheath tube joint is provided with first threads, the dilator is fixedly connected with the dilator joint, and the dilator joint is provided with second threads; the first thread and the second thread are mated such that: when the sheath tube is sleeved outside the dilator, the first thread can be in meshed connection with the second thread.

Description

Operation assembly for percutaneous nephrolithotomy

Technical Field

The utility model relates to the field of medical equipment, especially, relate to a surgical assembly of percutaneous nephroscope rubble calculus extraction art.

Background

Percutaneous nephrolithotripsy, also characterized as PCNL, is a modern, minimally invasive surgical technique for lithotripsy and lithotomy in vivo by passing a nephroscope through a percutaneous renal passage (a passage that passes percutaneously into the calyx of the renal pelvis).

In the prior art, a percutaneous nephrolithotomy needs to use a medical device dilator and a sheath tube to establish a percutaneous renal channel. The conventional PCNL procedure uses a telescoping structure between the dilator and sheath, with the dilator on the inner layer and the sheath on the outer layer.

However, the relative axial position of the two is usually not fixed, and therefore, during use, the operator is required to push the dilator with his palm to prevent the dilator tip from retracting into the sheath tube when encountering resistance. It is seen that it causes a problem of inconvenient operation.

SUMMERY OF THE UTILITY MODEL

The utility model provides an operation component for percutaneous nephrolithotomy to solve the problem of inconvenient operation.

According to a first aspect of the present invention, there is provided a surgical assembly for percutaneous nephrolithotomy, comprising: the sheath tube is fixedly connected with the sheath tube joint, the sheath tube joint is provided with first threads, the dilator is fixedly connected with the dilator joint, and the dilator joint is provided with second threads;

the first thread and the second thread are mated such that: when the sheath tube is sleeved outside the dilator, the first thread can be in meshed connection with the second thread.

Optionally, the expander joint comprises an expander joint body and a thread clamping ring connected to the expander joint body, the expander is fixedly connected to the expander joint body, the thread clamping ring is fixed relative to the expander joint body, the thread clamping ring can rotate relative to the expander joint body, and the second thread is arranged on the thread clamping ring.

Optionally, the surgical assembly for percutaneous nephrolithotomy further comprises a drainage tube capable of being placed into the sheath tube, a balloon is arranged outside the drainage tube, and an inner cavity of the balloon is communicated with an inner cavity of the drainage tube; one end of the drainage tube is provided with a Y-shaped joint;

the first interface of the Y-shaped joint is connected with the drainage tube;

the second interface of the Y-shaped joint is communicated with the first interface of the Y-shaped joint, so that: the medium for filling the balloon can enter the balloon through the second interface of the Y-shaped joint, the internal channel of the Y-shaped joint, the first interface of the Y-shaped joint and the inner cavity of the drainage tube in sequence;

the third interface of the Y-shaped joint is communicated with the first interface of the Y-shaped joint, so that: liquid required to be drained and drained can be discharged through the inner cavity of the drainage tube, the first interface of the Y-shaped joint, the internal channel of the Y-shaped joint and the third interface of the Y-shaped joint in sequence;

when the sheath tube is sleeved outside the drainage tube, the Y-shaped joint is positioned on one side of the sheath tube along the axial direction of the sheath tube.

Optionally, the sheath coupling includes the sheath coupling body and follows the axial of sheath pipe is located the handle is torn to at least two of one side of sheath coupling body, at least two tear the handle with the equal fixed connection of sheath coupling body in the outside of sheath pipe, first screw thread is located the sheath coupling body, the material that can the atress was torn is managed for the sheath.

Optionally, the surgical assembly for percutaneous nephrolithotomy further includes a negative pressure joint, the negative pressure joint includes a first tube body having a first channel and a second tube body having a second channel, the second tube body is connected to a side wall of the first tube body, and the second channel is capable of communicating with the first channel;

when the negative pressure joint is connected with the sheath tube, the first channel is communicated with the inner channel of the sheath tube, so that: a percutaneous nephroscope is capable of accessing the internal channel of the sheath through the first channel, the second channel communicating to the internal channel of the sheath through the first channel such that: under the action of negative pressure, crushed stones can enter the second channel through the inner channel of the sheath tube and the first channel.

Optionally, one end of the negative pressure joint, which is used for connecting the sheath tube, is provided with a third thread;

the first thread and the third thread are mated such that: when the negative pressure joint is connected with the sheath tube, the first thread can be meshed with the third thread.

Optionally, the third thread includes at least two thread segments distributed along the length direction of the first pipe body, and a sealing ring is arranged between two adjacent thread segments.

Optionally, the surgical assembly for percutaneous nephrolithotomy further includes a sealing cap capable of sealing an end of the first tube body not provided with the third thread, the sealing cap is connected with a retaining ring, and the retaining ring is assembled to the first tube body and/or the second tube body.

Optionally, the lateral wall of second body is equipped with the negative pressure and adjusts the mouth.

Optionally, the dilator has at least one channel therein;

if the number of channels in the dilator is at least two, then: the at least two channels comprise a guide wire channel for accessing a guide wire and a fiber channel for accessing an optical fiber;

if the number of channels in the dilator is one, then: the channel is a guidewire channel for accessing a guidewire.

Optionally, the dilator comprises at least one layer of tube wall;

if the number of the tube walls in the expander is at least two, the at least two layers of tube walls comprise a metal tube wall and a high polymer material tube wall, the high polymer material tube wall is positioned on the outer side of the metal tube wall, and a developing structure is arranged on the surface of the metal tube wall;

if the number of the tube walls in the expander is one layer, the tube wall of the layer comprises a high polymer material tube wall or a metal tube wall.

The utility model provides an among the operation subassembly of percutaneous nephrolithotomy lithotomy, can be through first screw thread and second screw thread interlock between sheath pipe and the expander, after the interlock, can be fixed along axial position between sheath pipe and the expander, and then, can prevent to take place the retrusion for the sheath pipe at the in-process expander of establishing the passageway, avoided because of situations such as unable expansion that the expander retrusion leads to.

In a further alternative, corresponding hardware is further provided for drainage of liquid such as urine after operation through the drainage tube, wherein in order to avoid the situation that the sheath tube cannot exit due to the drainage tube, the sheath tube can be configured to be of a material capable of being torn, and a corresponding handle is arranged for tearing.

Consider that clinical sometimes has the negative pressure to attract and reduce the kidney in pressure, clear away the demand of rubble, nevertheless need use other negative pressure to attract the product, can increase the step and the patient's economic burden of the exchange use apparatus in the art, so, the utility model discloses in the further alternative, still provide corresponding hardware for the negative pressure rubble through the negative pressure joint, simultaneously, still can play through threaded connection and be convenient for quick assembly and dismantlement, simplify positive effects such as processing step in the art, reduction patient's economic burden.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.

Fig. 1 is a first schematic structural view of an expander and a sheath according to an embodiment of the present invention;

fig. 2 is a schematic structural view of the dilator separated from the sheath according to an embodiment of the present invention;

fig. 3 is a schematic structural view of an assembled dilator and sheath according to an embodiment of the present invention;

fig. 4 is a schematic cross-sectional view of an expander and a sheath according to an embodiment of the present invention;

FIG. 5 is a schematic structural view of a drainage tube and a Y-shaped joint according to an embodiment of the present invention;

FIG. 6 is a schematic view of the structure of the drainage tube, the Y-shaped joint and the sheath tube according to an embodiment of the present invention;

fig. 7a is a partial structural view of a sheath according to an embodiment of the present invention;

fig. 7b is a schematic view of a partial structure of a sheath according to an embodiment of the present invention;

fig. 8a is a first schematic view of the channel distribution in the dilator according to an embodiment of the present invention;

fig. 8b is a schematic view showing the distribution of the channels in the dilator according to an embodiment of the present invention;

fig. 9a is a first schematic structural view of the wall of the dilator tube according to an embodiment of the present invention;

fig. 9b is a schematic structural view of the tube wall of the dilator according to an embodiment of the present invention;

fig. 10 is a first schematic structural view of a sheath tube and a negative pressure joint according to an embodiment of the present invention;

fig. 11 is a second schematic structural view of the sheath tube and the negative pressure joint according to an embodiment of the present invention;

fig. 12 is a schematic view of a partial structure of a negative pressure joint according to an embodiment of the present invention.

Description of reference numerals:

1-sheath tube;

2-a dilator;

201-metal tube wall;

202-high molecular material pipe wall;

3-expander joints;

301-expander joint body;

302-screw collar

4-a first thread;

5-sheath joint;

501-tearing off the handle;

502-a sheath fitting body;

6-anti-slip stripes;

7-a second thread;

8-balloon;

9-a drainage tube;

a 10-Y type linker;

11-a first interface;

12-a second interface;

13-a third interface;

14-a channel;

15-a circular table portion;

16-negative pressure joint;

1601-a first tubular body;

1602-a second tube;

1603 — first channel;

1604-a second channel;

17-anti-skid lines;

18-a sealing cap;

19-a retaining ring;

20-third screw thread

21-a negative pressure regulating port;

22-sealing ring.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

The terms "first," "second," "third," "fourth," and the like in the description and in the claims, as well as in the drawings, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

The technical solution of the present invention will be described in detail with specific examples. The following several specific embodiments may be combined with each other, and details of the same or similar concepts or processes may not be repeated in some embodiments.

Fig. 1 is a first schematic structural view of an expander and a sheath according to an embodiment of the present invention; fig. 2 is a schematic structural view of the dilator separated from the sheath according to an embodiment of the present invention; fig. 3 is a schematic structural view of an assembled dilator and sheath according to an embodiment of the present invention; fig. 4 is a schematic cross-sectional view of the dilator and the sheath according to an embodiment of the present invention.

Referring to fig. 1-4, a surgical assembly for percutaneous nephrolithotomy includes: the dilator comprises a dilator 2, a dilator joint 3, a sheath tube 1 and a sheath tube joint 5, wherein the sheath tube 1 is fixedly connected with the sheath tube joint 5, the sheath tube joint 5 is provided with a first thread 4, the dilator 2 is fixedly connected with the dilator joint 3, and the dilator joint 3 is provided with a second thread 7;

the first thread 4 and the second thread 7 are matched so that: when the sheath tube 1 is externally sleeved on the expander 2, the first threads 4 can be in snap connection with the second threads 7.

In one example, as shown in fig. 1 to 4, the first thread 4 may be an external thread and the second thread 7 may be an internal thread, and in other examples, the first thread 4 may be an internal thread and the second thread 7 may be an external thread.

In the scheme, the sheath tube and the dilator can be meshed through the first threads and the second threads, after meshing, the axial position between the sheath tube and the dilator can be fixed, and then the dilator can be prevented from moving backwards relative to the sheath tube in the process of establishing a channel, and the situations that the dilator cannot be expanded due to backward movement are avoided.

In contrast, in the related art, the conventional PCNL procedure uses a sleeve-type structure between the dilator and the sheath, the dilator is on the inner layer, the sheath is on the outer layer, and the axial relative positions of the dilator and the sheath cannot be completely fixed, so that the operator needs to push the dilator with his palm to prevent the dilator tip from retracting into the sheath when encountering resistance. Therefore, the expander joint and the sheath tube are respectively provided with the threads, the expander and the sheath tube can be locked by screwing the threads, and the axial relative positions of the expander and the sheath tube are completely limited, so that the situation that the tip end of the expander slides backwards when meeting a resistance is prevented.

In one embodiment, referring to fig. 4, the expander connector 3 includes an expander connector body 301 and a threaded collar 302 connected to the expander connector body 301, the expander 2 is fixedly connected to the expander connector body 301, the position of the threaded collar 302 is fixed relative to the expander connector body 301, the threaded collar 302 can rotate relative to the expander connector body 301, and the second thread 7 is provided on the threaded collar 302, and particularly, can be provided on the inner side of the threaded collar 302 in the radial direction.

Further, an annular groove may be formed outside the expander joint body 301, and the thread collar 302 may be provided with an annular protrusion, which may be inserted into the annular groove, thereby achieving relative rotation between the thread collar 302 and the expander joint body 301.

In a specific example, a sealing ring may be provided between the partial pipe sections of the second thread 7.

FIG. 5 is a schematic structural view of a drainage tube and a Y-shaped joint according to an embodiment of the present invention; fig. 6 is a schematic structural view of the drainage tube, the Y-shaped joint and the sheath tube according to an embodiment of the present invention.

Referring to fig. 5 and 6, the surgical assembly for percutaneous nephrolithotomy further includes a drainage tube 9 capable of being placed into the sheath tube, a balloon 8 is disposed outside the drainage tube 9, and an inner cavity of the balloon 8 is communicated with an inner cavity of the drainage tube 9; one end of the drainage tube 9 is provided with a Y-shaped joint 10;

the first interface 11 of the Y-shaped joint 10 is connected with the drainage tube 9;

the second port 12 of the Y-joint 10 communicates with the first port 11 of the Y-joint 10 so that: the medium for filling the balloon can enter the balloon 8 through the second interface 12 of the Y-shaped joint 10, the internal channel of the Y-shaped joint 10, the first interface 11 of the Y-shaped joint and the inner cavity of the drainage tube 9 in sequence;

the third port 13 of the Y-joint 10 communicates with the first port 11 of the Y-joint 10, so that: the liquid to be drained can be discharged through the inner cavity of the drainage tube 9, the first interface of the Y-shaped interface 10, the internal channel of the Y-shaped interface 10 and the third interface 13 of the Y-shaped interface 10 in sequence;

when the sheath tube 1 is sleeved outside the drainage tube 9, the Y-shaped joint 10 is positioned on one side of the sheath tube 1 along the axial direction of the sheath tube 1.

When laser lithotripsy or air pressure ballistic lithotripsy is adopted, water flow is generally used for filling so as to absorb heat generated by the laser lithotripsy and wash out the lithotripsy, but if the water flow or the water pressure is too large, higher intrarenal pressure is formed, and the condition of rupture of a kidney collection system and the like can be caused in severe cases. Therefore, the clinical operation needs to pump and drain water outside the body in time to flush out the calculi and reduce the intrarenal pressure while irrigating the calculi with water flow. Therefore, after the PCNL operation is finished, the drainage tube 9 (and the corresponding Y-shaped connector 10) can be left according to the patient condition after the operation to help the patient to discharge urine, and at this time, the drainage tube 9 needs to be inserted along the sheath channel. The drainage tube used in the PCNL operation can be a silica gel hose with a balloon at the head end capable of being filled with liquid, Y-shaped connectors are respectively arranged at the tail part of the drainage tube, and two connectors of the drainage tube are respectively used as a balloon filling connector and a drainage connector.

It can be seen that the sheath cannot be withdrawn after the drainage tube is placed in the human body, therefore, in one embodiment, destructive measures can be taken to tear and peel the sheath in two halves so that the sheath can be withdrawn from the human body, and further, the sheath can be made of a material capable of being torn by force, the sheath joint 5 comprises a sheath joint body 502 and at least two tearing handles 501 arranged on one side of the sheath joint body 502 along the axial direction of the sheath 1, and the at least two tearing handles 501 and the sheath joint body 502 are both fixedly connected to the outer side of the sheath 1.

Taking fig. 6 as an example, the sheath can be torn in the direction of the arrow shown in fig. 6, and is therefore also referred to as a tearable sheath or a peeling sheath. The special material of sheath pipe can guarantee that its body can be easily torn manually and peel off.

Meanwhile, in an example, the sheath joint body 502 may also be made of a material suitable for tearing, in another example, the sheath joint body 502 may include at least two body portions, the two body portions may be spliced to form the sheath joint body 502 and the first thread 4 thereon, after the sheath is torn, the two body portions of the sheath joint body 502 may also be separated, in yet another example, the sheath joint body 502 may be assembled to the sheath 1 and/or the tearing handle 501, and further, the sheath may be torn by detaching the sheath joint body 502.

In the in-service use process, can cut a breach at the sheath coupling, then tear sheath pipe along the shaft and peel off, and then, can solve the problem that sheath pipe can't withdraw from behind the drainage tube is kept somewhere in the PCNL operation. In the specific implementation process, the tearing handle 501 can be further provided with anti-slip stripes 6, so that the friction force of hand-held kneading is increased.

It is thus clear that in the above scheme of adopting the drainage tube, still provide corresponding hardware for the drainage of liquid such as postoperative urine through the drainage tube, wherein, in order to avoid causing the unable condition emergence of withdrawing of sheath pipe because of the drainage tube, still can configure the material that the sheath pipe can be torn into, and set up corresponding handle for the convenience is torn.

Fig. 7a is a partial structural view of a sheath according to an embodiment of the present invention; fig. 7b is a schematic view of a partial structure of the sheath according to an embodiment of the present invention.

Referring to fig. 7a and 7b, the head end of the sheath tube may form a circular truncated cone portion 15, which may also be understood as a small-taper expanding section formed by chamfering the head end of the sheath tube, and it may also be smoothly transited, and the circular truncated cone portion 15 may reduce the stepped insertion resistance formed when cooperating with the dilator, and further, may facilitate cooperating with the dilator, and may reduce the resistance to pushing when screwing into the human body, and reduce the trauma to the tissue.

Fig. 8a is a first schematic view of the channel distribution in the dilator according to an embodiment of the present invention; fig. 8b is a schematic view showing the distribution of the channels in the dilator according to an embodiment of the present invention.

Referring to fig. 8a and 8b, the dilator 2 has at least two channels 14 therein, through which a space is provided for the entrance and exit of instruments, so that the channels may be instrument channels, providing more options for surgical treatment, such as a guide wire channel for accessing a guide wire and a fiber channel for accessing an optical fiber. It is understood that the dilator 2 may be a multi-lumen tube, and in other embodiments, the dilator 2 may have only one channel therein, thereby forming a single lumen tube.

In a specific implementation process, if only one channel is provided, only one channel can be used for passing through a guiding instrument (such as a guide wire and the like), if a plurality of channels are provided, not only a cavity channel of the guiding instrument but also other instrument working channels can be reserved, and enough operation space is reserved for the working of other auxiliary medical instruments (such as optical fibers and the like), and further, when the number of the channels in the dilator is at least three, the dilator can also comprise other surgical instrument channels besides the above-mentioned guide wire channel and optical fiber channel.

In other examples, the at least two channels may also include a pressure input channel.

Fig. 9a is a first schematic structural view of the wall of the dilator tube according to an embodiment of the present invention; fig. 9b is a schematic structural diagram of the tube wall of the dilator according to an embodiment of the present invention.

The dilator 2 comprises at least one layer of tube wall; taking fig. 9a and 9b as an example, if the number of tube walls in the dilator 2 is at least two layers: the at least two layers of pipe walls may include, for example, a metal pipe wall 201 and a polymer pipe wall 202, where the polymer pipe wall 202 is located outside the metal pipe wall 201, and a developing structure may be disposed on a surface of the metal pipe wall 201. If the number of the tube walls in the expander 2 is one, the tube wall of the layer can be a high polymer material tube wall or a metal tube wall.

The developing structure can be understood as any structure capable of enhancing the developing effect under the action of ultrasonic waves or other detection equipment.

In a specific example, the developing structure may be formed by machining the surface of the pipe wall in various forms (grinding/sand blasting/reticulating/winding the pipe shape/external thread groove, etc.), and may include at least one of the following: sand blasting and polishing structure, ring groove structure, spiral groove structure, pit structure.

In addition, the metal pipe wall 201 may be a single layer or multiple layers, the same layer of pipe wall may have one or more developing structures, and different layers of pipe walls may have the same or at least partially different developing structures.

It can be seen that in the above scheme, the tube wall of the dilator may be a single layer, or may be a multi-layer composite material (i.e. having at least two layers of tube walls), and the design of the multi-layer composite material may be used to enhance the development effect of the dilator under ultrasonic waves.

Fig. 10 is a first schematic structural view of a sheath tube and a negative pressure joint according to an embodiment of the present invention; fig. 11 is a second schematic structural view of the sheath tube and the negative pressure joint according to an embodiment of the present invention; fig. 12 is a schematic view of a partial structure of a negative pressure joint according to an embodiment of the present invention.

Referring to fig. 10 to 12, the surgical assembly for percutaneous nephrolithotomy further includes a negative pressure connector 16, the negative pressure connector 16 includes a first tube 1601 having a first channel 1603 and a second tube 1602 having a second channel 1604, the second tube 1602 is connected to a side wall of the first tube 1601, and the second channel 1604 is capable of communicating with the first channel 1603.

When the negative pressure joint 16 is connected to the sheath 1, the first channel 1603 communicates with the internal channel of the sheath, so that: a percutaneous nephroscope can access the internal channel of the sheath through the first channel 1603, the second channel 1604 being communicated to the internal channel of the sheath 1 through the first channel 1603 such that: under the action of negative pressure, crushed stones can enter the second channel 1604 through the inner channel of the sheath 1 and the first channel 1603, and then can be discharged.

It can be seen that through the first channel 1603, it can be used to accommodate percutaneous nephroscope placement for lithotripsy of kidney stones and irrigation hydraulic irrigation; through the second channel 1604 of the side branch, a negative pressure calculus removing channel can be formed for connecting a negative pressure suction system to wash and discharge the crushed stone in the kidney.

In one embodiment, the end of the negative pressure connector 16 for connecting the sheath is provided with a third thread 20. The third thread 20 may be an internal thread as shown, or an external thread, which may be designed to match the configuration of the first thread.

The first thread 4 and the third thread 20 are matched so that: when the negative pressure connector 16 is connected to the sheath 1, the first thread 4 can be engaged with the third thread 20.

When the negative pressure suction gravel is needed, the single negative pressure joint and the sheath pipe joint can be quickly assembled in a threaded connection mode; after the negative pressure suction is finished, the negative pressure connector can be quickly detached by unscrewing the threads, and the negative pressure suction system is removed in time.

In a specific implementation process, the third thread 20 includes at least two thread segments distributed along the length direction of the first pipe body, and a sealing ring 22 is disposed between two adjacent thread segments, for example: when the number of the thread segments is two, the sealing ring 22 may be disposed between two thread segments, and the sealing ring 22 may be embedded in an annular cavity of the negative pressure connector 16 (e.g., an inner wall of the first tube 1601 thereof).

The sealing performance of the threaded connection can be ensured by the above sealing ring 22.

In a specific implementation, the surgical assembly for percutaneous nephrolithotomy further includes a sealing cap 18 capable of sealing an end of the first tube 1601 not provided with the third thread, the sealing cap 18 may be, for example, a rubber sealing cap, and sealing performance can be ensured by sealing connection (e.g., fastening, screwing) between the sealing cap and the negative pressure connector.

The sealing cap 18 can be connected with a retaining ring 19, the retaining ring 19 can be assembled on the first tube body 1601 and/or the second tube body 1602, and the retaining ring 19 can be placed in a ring groove of the tube body of the negative pressure joint, so that the sealing cap is fixed on the negative pressure joint and is not easy to lose.

Specifically, the middle of the sealing cap 18 is provided with a small hole with a diameter smaller than that of the percutaneous nephroscope body, and the gap between the sealing cap and the nephroscope body can be reduced by using the elasticity of rubber on the basis of passing through the percutaneous nephroscope, so that the sealing property is ensured.

In the specific implementation process, a negative pressure adjusting port 21 is disposed on the side wall of the second tube 1602. Furthermore, the air pressure in the channel can be controlled by adjusting the thumb pressing position, namely closing the size of the adjusting opening, so that the size of the negative pressure suction water flow is controlled.

In the specific implementation process, the outer side of the side wall of the second tube 1602 is also provided with anti-slip lines to enhance the finger holding feeling.

In consideration of the clinical requirements of reducing the intra-renal pressure and removing the crushed stones by negative pressure suction sometimes, but additional negative pressure suction products are needed, so that the step of exchanging and using instruments in the operation and the economic burden of a patient are increased, therefore, in the scheme, the negative pressure connector is introduced, corresponding hardware can be provided for the negative pressure crushed stones, and meanwhile, the positive effects of facilitating quick assembly and disassembly, simplifying the treatment steps in the operation, reducing the economic burden of the patient and the like can be achieved through threaded connection.

In summary, it can be seen that compared to the devices employed for conventional PCNL surgery: the utility model discloses or its alternative can possess following positive technological effect:

the combination of the dilator and the sheath tube used in the conventional PCNL operation is axially locked in a threaded connection mode, so that the situation that the tip end is blocked by the dilator to slide is avoided;

an independent negative pressure suction joint is added on the basis of the conventional PCNL operation, so that the selection of negative pressure suction lithotripsy is provided for clinic, the intra-renal pressure is reduced in time, and the operation risk is reduced. The joint is physically connected with a conventional PCNL surgical instrument in a threaded manner, so that the joint can be quickly assembled and disassembled, and the surgical time is greatly saved;

the sheath tube is provided with a tearing handle, so that the drainage tube can be easily peeled off to exit from the human body after being placed, and the restriction that the drainage tube cannot exit from the sheath tube due to the placement of the drainage tube in a ducted operation is avoided.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims

1. A surgical assembly for percutaneous nephrolithotomy, comprising: the sheath tube is fixedly connected with the sheath tube joint, the sheath tube joint is provided with first threads, the dilator is fixedly connected with the dilator joint, and the dilator joint is provided with second threads;

2. The percutaneous nephrolithotomy surgical assembly according to claim 1, wherein the dilator joint comprises a dilator joint body and a threaded collar connected to the dilator joint body, the dilator is fixedly connected to the dilator joint body, the position of the threaded collar is fixed relative to the dilator joint body, the threaded collar is rotatable relative to the dilator joint body, and the second thread is provided on the threaded collar.

3. The percutaneous nephrolithotomy surgical assembly according to claim 1, further comprising a drainage tube capable of being placed in the sheath tube, a balloon being provided outside the drainage tube, and an inner cavity of the balloon communicating with an inner cavity of the drainage tube; one end of the drainage tube is provided with a Y-shaped joint;

the first interface of the Y-shaped joint is connected with the drainage tube;

4. The percutaneous nephrolithotomy surgical assembly according to claim 3, wherein the sheath joint comprises a sheath joint body and at least two tearing handles arranged on one side of the sheath joint body along an axial direction of the sheath, the at least two tearing handles and the sheath joint body are both fixedly connected to an outer side of the sheath, the first thread is arranged on the sheath joint body, and the sheath is made of a material capable of being torn by force.

5. The percutaneous nephrolithotomy surgical assembly according to any one of claims 1 to 4, further comprising a negative pressure connector comprising a first tube having a first channel and a second tube having a second channel, the second tube being connected to a side wall of the first tube, and the second channel being connectable to the first channel;

6. The percutaneous nephrolithotomy surgical assembly according to claim 5, wherein one end of the negative pressure joint for connecting the sheath is provided with a third thread;

7. The percutaneous nephrolithotomy surgical assembly according to claim 6, wherein the third thread comprises at least two thread segments distributed along a length of the first tube, and a sealing ring is disposed between two adjacent thread segments.

8. The percutaneous nephrolithotomy surgical assembly according to claim 6, further comprising a sealing cap capable of closing an end of the first tube not provided with the third thread, the sealing cap being connected to a retaining ring, the retaining ring being assembled to the first tube and/or the second tube;

and a negative pressure adjusting port is formed in the side wall of the second pipe body.

9. The percutaneous nephrolithotomy surgical assembly according to any one of claims 1-3, wherein the dilator has at least one channel therein;

10. The percutaneous nephrolithotomy surgical assembly according to any one of claims 1-3, wherein the dilator comprises at least one layer of tube wall;

if the number of the tube walls in the dilator is at least two layers, then: the at least two layers of pipe walls comprise metal pipe walls and high polymer material pipe walls, the high polymer material pipe walls are positioned on the outer sides of the metal pipe walls, and developing structures are arranged on the surfaces of the metal pipe walls;

if the number of the tube walls in the expander is one layer, the tube wall of the layer is a high polymer material tube wall or a metal tube wall.