CN113289207A

CN113289207A - Curve drainage nephrostomy tube

Info

Publication number: CN113289207A
Application number: CN202110502093.8A
Authority: CN
Inventors: 蒋军辉; 程跃; 严泽军
Original assignee: Ningbo First Hospital
Current assignee: Ningbo First Hospital
Priority date: 2021-05-08
Filing date: 2021-05-08
Publication date: 2021-08-24

Abstract

The invention provides a curved drainage nephrostomy tube, which comprises a curved head; a balloon and an extension body, the bending head, the balloon and the extension body are integrally connected, the curved drainage nephrostomy tube has a guide passage adapted to pass through a guide to guide the curved drainage nephrostomy tube into a nephrostomy passage of a human body, the bending head is provided with a first inner channel and at least two drainage curve channels, each drainage curve channel is positioned outside the first inner channel, the balloon is provided with an inflation cavity and a second inner channel, the inflation cavity surrounds the outer part of the second inner channel, the drainage curve of the bending head is communicated with the second inner channel of the balloon, the extension body is provided with a third inner channel, a second internal channel of the balloon communicates with the third internal channel of the diffractive body, the first, second and third internal channels communicating to form the guide channel.

Description

Curve drainage nephrostomy tube

Technical Field

The invention relates to the field of medical appliance supplies, in particular to a curved drainage nephrostomy tube.

Background

Nephrostomy drainage is an operation for draining urine, pus, blood and the like and facilitating the formation of a sinus path by puncturing or cutting the parenchyma of the kidney and delivering a catheter into a renal pelvis. In nephrostomy drainage it is often necessary to use a nephrostomy tube which is placed in the nephrostomy passage for a predetermined time.

The prior art nephrostomy tube body has a passage with two symmetrical holes at the end, which are connected to the internal passage, and when the end is left in the renal pelvis, the fluid in the renal pelvis is delivered through the delivery path formed by the two holes and the passage.

As mentioned above, the drainage of the pyelostomy usually requires the drainage of urine, pus, blood, etc., which are much more concentrated than the normal body fluids, such as urine, and even have some small lumps, in which case, in practice, it is found that the existing fistulation tubes are often blocked, which causes inconvenience to both the doctor and the patient.

On the one hand, if the patient is not in timely contact with the blockage, the renal pressure may be too high, and complications may occur. Flushing or replacing the pipe is also a relatively cumbersome matter if it is frequently plugged.

On the other hand, for medical personnel, more energy and time are needed to observe and control, the situation of blockage is avoided, or the situation of blockage needs to be handled in time.

On the other hand, the existing nephrostomy tube, which has a straight end and a relatively small entrance aperture, i.e. only one through hole for guiding the entrance, is very limited, which is the root cause of the easy occurrence of blockage.

Disclosure of Invention

It is an object of the present invention to provide a curved drainage nephrostomy tube that directs fluid entry by extending the drainage path through curved drainage, thereby not being limited to an aperture drainage path.

It is an object of the present invention to provide a curved drainage tube for nephrostomy which allows fluid in the renal pelvis to enter the multi-directional drainage tube from all directions by means of open drainage, rather than being confined to one direction by an aperture.

An object of the present invention is to provide a curved drainage tube for nephrostomy, which is suitable for thick or viscous or small liquid by guiding liquid in an open drainage way, and is suitable for use after nephrostomy drainage operation.

An object of the present invention is to provide a curved drainage nephrostomy tube, wherein the curved drainage nephrostomy tube is provided with a plurality of drainage curves, and the plurality of drainage curves are arranged at intervals to reduce the occurrence of blockage by shunting.

An object of the present invention is to provide a curved drainage nephrostomy tube, wherein the curved drainage nephrostomy tube disperses accumulated liquid and particles by means of drainage with multiple guide walls, reducing the probability of liquid mixed with particles accumulating at one position, i.e. no or less complete blockage occurs.

It is an object of the present invention to provide a curved drainage nephrostomy tube that includes a curved head, the end of which is curved when the indwelling segment is placed in the body, without sharp points or protrusions, thereby reducing adverse irritation to the internal organs of the body.

It is an object of the present invention to provide a curved drainage nephrostomy tube that coordinates the functional requirements of both bending and diversion by designing the open position of the drainage curve and the direction of bending in conjunction with the internal segment.

It is an object of the present invention to provide a curved drainage nephrostomy tube, wherein in one embodiment it comprises an outer wall disposed at the outer end of the guide wall to prevent the outer end of the guide wall from directly contacting the intima of the body, so that the built-in section can be smoothly passed through the body passageway.

It is an object of the present invention to provide a curved drainage nephrostomy tube wherein the outer walls are arcuately shrouded outside the guide wall with a gap between adjacent outer walls to form a protective guide wall that tends to be circumferential in the event of liquid flow.

To achieve at least one of the above advantages, one aspect of the present invention provides an elbow drainage nephrostomy tube comprising:

a bending head; a balloon and an extension body, the bending head, the balloon and the extension body are integrally connected, the curved drainage nephrostomy tube has a guide passage adapted to pass through a guide to guide the curved drainage nephrostomy tube into a nephrostomy passage of a human body, the bending head is provided with a first inner channel and at least two drainage curve channels, each drainage curve channel is positioned outside the first inner channel, the balloon is provided with an inflation cavity and a second inner channel, the inflation cavity surrounds the outer part of the second inner channel, the drainage curve of the bending head is communicated with the second inner channel of the balloon, the extension body is provided with a third inner channel, a second internal channel of the balloon communicates with the third internal channel of the diffractive body, the first, second and third internal channels communicating to form the guide channel.

The curved drainage nephrostomy tube according to one embodiment, wherein the drainage curve has an opening communicating with the outside and a communicating hole communicating with the second inner channel of the balloon.

According to one embodiment, the curved drainage nephrostomy tube comprises a first tube body and a plurality of guide walls, wherein each guide wall is radially arranged on the outer side of the first tube body, and two adjacent guide walls form the drainage curve.

According to one embodiment, the curved drainage nephrostomy tube comprises a first tube body and a plurality of guide walls, wherein the guide walls are symmetrically distributed outside the first tube body.

The curved draining nephrostomy tube according to one embodiment, wherein said guide wall has at least one micropore communicating two adjacent said draining curves.

The curved drainage nephrostomy tube according to one embodiment, wherein the curved head end is tapered.

The curved drainage nephrostomy tube of an embodiment includes a positioning line disposed along the extension body.

The curved drainage nephrostomy tube according to one embodiment, wherein said curved head includes a protective wall disposed arcuately outside said guide wall, a gap being formed between adjacent ones of said walls, said gap communicating between the inside and outside spaces of said drainage curve.

According to one embodiment, the curved draining nephrostomy tube is characterized in that one of the draining curves is located at an inner curve of the bending head, and the other draining curve is located at an outer curve of the bending head.

The curved draining nephrostomy tube according to one embodiment, wherein the number of said guide walls is selected from 2, 3, 4, 5, 6 or 7.

Drawings

Fig. 1 is a perspective view illustrating a curved state of a curved drainage renal fistula according to a first embodiment of the present invention.

Fig. 2 is a schematic cross-sectional view of fig. 1.

Fig. 3 is a schematic view of a straightened state of a curved drainage nephrostomy tube insertion guide according to a first embodiment of the present invention.

Fig. 4 is a partially enlarged schematic view of a curved drainage nephrostomy tube according to a first embodiment of the present invention for explaining the structure of the curved head.

Fig. 5 is a schematic view of the inflated state of a curved drainage nephrostomy tube according to a first embodiment of the present invention.

Figure 6 is a schematic end view of a curved head of a curved drainage stoma tube according to a first embodiment of the invention.

Figures 7A-7E are schematic illustrations of the use of a curved drainage nephrostomy tube according to a first embodiment of the present invention.

Figures 8A-8E are a conduction curve modification of a curve conduction nephrostomy tube according to a first embodiment of the present invention.

Fig. 9A-9C are variations of the guard wall of the bending head according to the second embodiment of the invention.

Fig. 10 is a curved drainage nephrostomy tube according to a third embodiment of the invention.

Detailed Description

The following description is presented to disclose the invention so as to enable any person skilled in the art to practice the invention. The preferred embodiments in the following description are given by way of example only, and other obvious variations will occur to those skilled in the art. The basic principles of the invention, as defined in the following description, may be applied to other embodiments, variations, modifications, equivalents, and other technical solutions without departing from the spirit and scope of the invention.

It will be understood by those skilled in the art that in the present disclosure, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings for ease of description and simplicity of description, and do not indicate or imply that the referenced devices or components must be in a particular orientation, constructed and operated in a particular orientation, and thus the above terms are not to be construed as limiting the present invention.

It is understood that the terms "a" and "an" should be interpreted as meaning that a number of one element or element is one in one embodiment, while a number of other elements is one in another embodiment, and the terms "a" and "an" should not be interpreted as limiting the number.

References to "one embodiment," "an embodiment," "example embodiment," "various embodiments," "some embodiments," etc., indicate that the embodiment described herein may include a particular feature, structure, or characteristic, but every embodiment may not necessarily include the feature, structure, or characteristic. In addition, some embodiments may have some, all, or none of the features described for other embodiments.

Fig. 1 is a perspective view illustrating a curved state of a curved drainage renal fistula according to a first embodiment of the present invention. Fig. 2 is a schematic cross-sectional view of fig. 1. Fig. 3 is a schematic view of a straightened state of a curved drainage nephrostomy tube insertion guide according to a first embodiment of the present invention. Fig. 4 is a partially enlarged schematic view of a curved drainage nephrostomy tube according to a first embodiment of the present invention for explaining the structure of the curved head. Fig. 5 is a schematic view of the inflated state of a curved drainage nephrostomy tube according to a first embodiment of the present invention. Figure 6 is a schematic end view of a curved head of a curved drainage stoma tube according to a first embodiment of the invention. Figures 7A-7E are schematic illustrations of the use of a curved drainage nephrostomy tube according to a first embodiment of the present invention.

Referring to fig. 1 to 7E, the present invention provides a curved drainage nephrostomy tube 1, said curved drainage nephrostomy tube 1 being used in nephrostomy drainage surgery, by way of example and not limitation, by puncturing or cutting the renal parenchyma, passing said curved drainage nephrostomy tube into the renal pelvis, draining urine, pus, blood out of the renal pelvis.

For convenience of explanation, the direction of entry into the renal pelvis of a human body is defined as forward, and the direction of entry into the renal pelvis of a human body or outside the body is defined as backward.

The curved draining nephrostomy tube 1 has a curved state 100 in which the front end of the curved draining nephrostomy tube 1 is curved and a straightened state 200 in which the curved draining nephrostomy tube 1 is adapted to be straightened under the guiding action of a guide 2 in the curved state 100. That is, in use, when it is desired to place the curved drainage nephrostomy tube 1 into the renal pelvis via the urethra of the human body, the curved drainage nephrostomy tube 1 can be introduced into the renal pelvis via a fistulation channel formed by puncturing or cutting the renal parenchyma under the guidance of the guide 2, and after entering the renal pelvis of the human body, the guide 2 is withdrawn and the end of the curved drainage nephrostomy tube 1 is bent to return to the bent state 100. In other words, the front end of the curved drainage nephrostomy tube 1 is a change in bending elasticity, which is related to the morphological requirements of the body organ in use.

The guide 2 is exemplified but not limited to a guide wire, an inner core or a predetermined guide 2 made to fit the curved draining nephrostomy tube 1 of the present invention. In other words, in actual manufacturing, the shape and size of the guide 2 can be designed according to the size and shape of the curved draining nephrostomy tube 1, if the requirement is consistent with the existing guide wire or inner core, the guide can be carried out by using the existing guide wire or inner core, and if the requirement is inconsistent, the guide 2 matched with the curved draining nephrostomy tube 1 needs to be manufactured separately.

The curve drainage nephrostomy tube 1 comprises a bending head 11, a balloon 12 and an extension main body 13, wherein the bending head 11, the balloon 12 and the extension main body 13 are sequentially arranged in a linear manner. The bending head 11 is located in front of the balloon 12, and the extension body 13 is located behind the balloon 12. That is, in use, the bending head 11 is a portion which first enters the inside of the renal pelvis of the human body, and the extension body 13 is a portion which is close to the outside of the human body.

From the relative position relationship between the curved drainage nephrostomy tube 1 and the organs of the human body when in use, the bending head 11 is used for drainage arranged in the renal pelvis of the human body, the balloon 12 is used for being arranged at the outlet position of the renal pelvis of the human body to roughly fix the curved drainage nephrostomy tube 1, and the extension main body 13 is used for being arranged outside the renal pelvis of the human body and communicating with an external component. That is, in use, the drain tube and the balloon 12 are positioned within the renal pelvis, and the extension body 13 is positioned within the ureter and extends outside the human body. Examples of such external components are, but not limited to, urine bags, drainage tubes.

From the function of each part of the curved drainage nephrostomy tube 1, the bending head 11 is used for guiding liquid into the curved drainage nephrostomy tube 1, or the bending head 11 is used for guiding liquid in the renal pelvis of a human body outwards. The balloon 12 is used for fixing the curved drainage nephrostomy tube 1, or the balloon 12 is used for fixing the curved drainage nephrostomy tube 1 at the outlet position of the renal pelvis of a human body, and the extension main body 13 is used for conveying liquid entering the curved drainage nephrostomy tube 1 outwards, in other words, the extension main body 13 extends to the outside of the human body along a fistulization channel and conveys the liquid to the outside along the fistulization channel.

In one embodiment of the invention, the bending head 11, the balloon 12 and the extension body 13 are integrally connected. By way of example and not limitation, during the manufacture of the curved drainage nephrostomy tube 1, the curved drainage nephrostomy tube 1 is formed one or more times by means of a mold or by means of blow molding, injection molding or the like, and the curved head 11, the balloon 12 and the extension body 13 are thereby formed one or more times. In another embodiment of the invention, the bending head 11, the balloon 12 and the extension body 13 are detachably connected.

The bending head 11, the balloon 12 and the extension body 13 are substantially flexibly connected linearly. The bending head 11, the balloon 12 and the delivery end are arranged from inside to outside or from top to bottom in sequence.

In the bending state 100, the bending head 11 is bent, and in the straightening state 200, the bending head 11 is straightened under the guiding action of the guide 2. In other words, the straightening or bending of the bending head 11 is controlled by the action of the guide 2.

Further, 11 tip of bending head dwindles gradually, or longitudinal section be roughly trapezoidal limit for the pitch arc, promptly, the outer end is little, the inboard is big, perhaps semiellipse to be convenient for carry bend drainage nephrostomy tube gets into the passageway of making a fistula.

The curved drainage kidney fistulation tube 1 comprises a positioning line 18, and the positioning line 18 is used for positioning the position of the curved drainage kidney fistulation tube 1 in a human body and the depth of the curved drainage kidney fistulation tube entering the human body. The locating line 18 is imaged under monitoring light such as B-ultrasonic or X-ray. That is, the position and depth of the curved drainage fistula 1 can be determined by displaying the position of the positioning line 18 by means of B-ultrasonic imaging or X-ray imaging, so as to assist the operation, such as the catheterization operation of medical staff.

The positioning wire 18 extends along the extension body 13, and further, the positioning wire 18 is integrally disposed inside the extension body 13. By way of example and not limitation, during the manufacture of the curved drainage fistula 1, the extension body 13 is integrally formed, and the positioning wire 18 is preset inside the extension body 13. Further, the positioning wire 18 integrally extends along the extension body 13, the balloon 12, and the bending head 11. That is, the bending head 11, the balloon 12 and the extension body 13 all include a portion of the positioning wire 18 to facilitate the overall positioning and viewing of the curved draining nephrostomy tube 1 at the location inside the body.

Referring to fig. 2, the balloon 12 includes an outer wall 121 and an inner wall 122, the outer wall 121 and the inner wall 122 defining the inflation lumen 1201 therebetween. The inner wall 122 surrounds the second inner passage 1202. The plenum 1201 surrounds the exterior of the second inner passage 1202. Portions of the positioning wire 18 are integrally provided to the outer wall 121.

The curved drainage nephrostomy tube 1 has a guide channel 101, the guide channel 101 is located inside the curved drainage nephrostomy tube 1, and the guide channel 101 extends from the front end to the rear end of the curved drainage nephrostomy tube 1 so as to facilitate the passing of a guide 2.

The balloon 12 has an inflated state 1203 and an uninflated state 1204, and in the inflated state 1203 the balloon 12 is inflated such that the surface of the balloon 12 spherically protrudes over the surface of the extension body 13. In the uninflated state 1204, the balloon 12 is deflated and the surface of the balloon 12 and the surface of the extension body 13 are substantially congruent. That is, in the inflated state 1203, the balloon 12 forms a balloon protruding from the surface of the extension body 13.

The curved drainage nephrostomy tube 1 comprises an inflation port 14 and an inflation pipeline 15, wherein the inflation port 14 is communicated with the inflation pipeline 15, and the inflation pipeline 15 extends along the extension body 13 and is communicated with the balloon 12. The balloon 12 has an inflation cavity 1201, and the inflation tube 15 communicates with the inflation cavity 1201, so that the inflation cavity 1201 is inflated through the inflation port 14 and the inflation tube 15, that is, the balloon 12 forms an inflated balloon by means of inflation. In other words, inflation or deflation of the balloon 12 is controlled through the inflation interface 14 and the inflation conduit 15.

In one embodiment of the invention, the inflation tube 15 is integrally formed inside the wall of the curved drainage nephrostomy tube 1, i.e. the tube forming the inflation tube 15 is integrally connected to the inner wall of the curved drainage nephrostomy tube 1. In another embodiment of the present invention, the inflation pipe 15 is formed of a separate pipe and is embedded in the wall of the extension body 13. The inflation port 14 is provided at a position near the outside of the extension body 13.

The bending head 11 is provided with at least one drainage curve 1101, the drainage curve 1101 is provided with an opening 1001, the drainage curve 1101 is transversely communicated with an external space through the opening 1001, the drainage curve 1101 extends from the outer end to the rear end of the bending head 11 to a preset position, and the drainage curve 1101 is longitudinally communicated with the balloon 12. It is worth mentioning that since the bending head 11 is in the bending zone in the bending state 100, i.e. the flow-directing curve 1101 follows the bending form, the flow-directing curve 1101 forms a flow-directing curve, rather than a straight flow-directing. The curved drainage mode can reduce the probability of direct accumulation of particles such as blood clots to a certain extent because a linear plane or a bearing surface with a larger area is not formed. The opening 1001 of the flow-guiding curve 1101 extends along the bending head 11, i.e. opens in an elongate manner towards the outside.

It is also worth mentioning that by the way of the curve drainage of the bending head 11 of the present invention, the conveying path of the liquid is extended, and the effective area where the liquid can enter is enlarged, that is, the liquid can enter the inside of the bending head 11 from any node position of the drainage curve 1101, and is further conveyed, not limited to a single position of the small hole, thereby reducing the probability of the single position being blocked.

According to the embodiment of the present invention, the bending head 11 has a plurality of the flow-guiding curves 1101, and the plurality of flow-guiding curves 1101 are arranged in a predetermined layout. By way of example, but not limitation, the number of said flow-inducing curves 1101 is 2, 3, 5, 6, 7, 8 or more.

In this embodiment of the invention, the bending head 11 has six flow-guiding curves 1101, the six flow-guiding curves 1101 being arranged in a central symmetry.

Further, in this embodiment of the present invention, six said turning channels 1101 are evenly distributed, that is, the volume of six said turning channels 1101 is substantially the same. In another embodiment of the present invention, the volume of each of the flow-inducing curves 1101 is different, and preferably, the volume of each of the flow-inducing curves 1101 matches the bending direction of the bending head 11. By way of example and not limitation, the volume of the turning channel 1101 located inside the curve of the bending head 11 is larger, and the volume of the turning channel 1101 located outside the curve of the bending head 11 is smaller, i.e., the opening of the turning channel 1101 located inside the curve is larger than the opening of the turning channel 1101 located outside the curve.

With reference to fig. 2, 4, the bending head 11 has a first inner channel 1102, the first inner channel 1102 being used for guiding the guide 2 through. The first inner channel 1102 is located at a substantially central location of the bending head 11 and extends along the length of the bending head 11. The flow-directing bend 1101 is located outside the first inner passageway 1102. Further, the flow-inducing curved passage 1101 is circumferentially distributed around the first inner passage 1102.

Referring to FIG. 6, in this embodiment of the present invention, the outer ends of a plurality of said turning channels 1101 do not directly communicate with the exterior, that is, said turning channels 1101 communicate with the exterior in both the longitudinal and transverse directions. The ends of the guide walls 112 forming each of the flow-directing bends 1101 extend radially, and have a flow-dividing effect on the liquid entering at the ends and a substantial separation effect on bulk objects, such as blood clots.

In another embodiment of the invention, the exterior of said bending head 11 forms a closed conical shape. That is, the outer end surface of the flow-directing curve 1101 does not communicate with the outside. Thereby facilitating the entry of said bending head 11 into the stoma opening when straightened.

Referring to fig. 2, the balloon 12 has the inflation lumen 1201 and a second inner channel 1202, the inflation lumen 1201 surrounds the outside of the second inner channel to facilitate formation of a toroidal or balloon-like balloon. The inflation cavity 1201 is communicated with the inflation duct 15 so as to facilitate inflation of the inflation cavity 1201 through the inflation duct 15. The inflation interface 14 communicates with the inflation duct 15. That is, the inflation port 14, the inflation conduit 15 and the inflation lumen 1201 communicate to form an inflation channel 102. When the curved drainage nephrostomy tube 1 is used, after the balloon 12 enters a predetermined position of the renal pelvis of a human body, the inflation cavity 1201 is inflated by an inflation device through the inflation channel, so that the balloon 12 is expanded and fixed inside the renal pelvis of the human body, and hemostasis is pressed by the expanded balloon. The curved drainage kidney fistulation tube 1 further comprises an air valve 17, and the air valve 17 is detachably connected with the inflation interface 14 in a sealing mode. That is, when the balloon 12 is inflated, the gas valve 17 is sealed to the inflation port 14 such that the balloon 12 remains in the inflated state. The air valve 17 is used for connecting an inflating device to inflate the saccule or deflate the saccule.

The second inner channel 1202 of the balloon 12 communicates longitudinally between the bending head 11 and the extension body 13. Further, the second inner passage 1202 communicates the first inner passage 1102 of the bending head 11 and the flow-inducing curve 1101.

In other words, the second inner channel 1202 is used for passing the guide 2 and conveying the liquid. The second inner passage 1202 communicates with the first inner passage 1102 of the bending head 11 to form a part of the guide passage 101. The second inner channel 1202 and the flow-directing curve 1101 of the bending head 11 form part of the conveying channel 103.

When using the curved drainage nephrostomy tube 1, with the balloon 12 in the uninflated state 1204 and the bending head 11 in the straightened state 200 by the guide 2, the curved drainage nephrostomy tube 1 is guided by the guide 2 into the interior of the renal pelvis of the human body, and after the bending head 11 and the balloon 12 have reached the interior of the renal pelvis of the human body, the balloon 12 is inflated such that the balloon 12 remains in the inflated state 1203.

Referring to FIG. 2, the extension body 13 has a third internal passageway 1301, the third internal passageway 1301 being in longitudinal communication with the second internal passageway 1202. Integrally, the flow-directing curve 1101, the second inner passage 1202 and the third inner passage 1301 of the bending head 11 communicate with the delivery passage 103 integrally formed. The first inner passage 1102, the second inner passage 1202 and the third inner passage 1301 of the bending head 11 communicate to form the guide passage 101. That is, when guiding, the guide 2 passes through the third inner channel 1301, the second inner channel 1202 and the first inner channel 1102, thereby bringing the bending head 11 into the straightened state 200 and the entire curved draining nephrostomy tube 1 into a substantially straightened state for entering the interior of the renal pelvis of a human via a fistulation channel established at the time of a human surgery. When the drainage is used, the liquid in the renal pelvis of the human body can be conveyed to the outside through the drainage bend 1101, the second inner channel 1202 and the third inner channel 1301.

The extension body 13 is provided with a drain connection 16, which drain connection 16 is intended for connection to an external component. By way of example and not limitation, the drain interface 16 is connected to a drain or urine bag. The discharge port 16 is gradually increased from top to bottom, that is, the outer port is large and the inner side is small, thereby facilitating the sealed connection of external pipelines and devices.

Referring to fig. 1, the bending head 11 includes a first tube 111 and a guide wall 112, the guide wall 112 extends radially outward from the outer wall of the first tube 111 in the transverse direction to form the flow-guiding curve 1101, and the guide wall extends longitudinally along the outer portion of the first tube 111 in the longitudinal direction. That is, the guide wall 112 partitions the space outside the first pipe 111 to form the flow-directing curve 1101. The first tube 111 forms the first inner passage 1102. The outer side of the rear end of the guide wall 112 is connected to the balloon 12.

Referring to fig. 2 and 4, at least one communication hole 1002 is formed at the connecting position of the bending head 11 and the balloon 12, and the communication hole 1002 is communicated with a second channel 1202 of the balloon 12. Further, the connecting positions of the adjacent two guide walls and the balloon 12 form the communication hole 12. It should be noted that the communication hole 1002 is located at the top end of the balloon 12, and the communication hole 1002 is formed by the end of the guide wall 112, that is, in use, most of the liquid enters the communication hole 12 after entering the guide wall 12 by a gradual guiding function, so that the guide wall 112 has a certain gradual conveying and filtering function for the liquid at the position of the communication hole 12, and prevents a large volume of substance, such as blood clots, from directly reaching the communication hole 1002 to be blocked.

The bending head 11 includes a plurality of guide walls 112 symmetrically distributed on the outside of the first tube 111, respectively, so as to partition and form a plurality of flow guide curves 1101. The plurality of flow-inducing curved channels 1101 are each independently communicated with the second inner passage 1202. According to this embodiment of the present invention, the bending head 11 comprises 3 guide walls, 3 of the flow-directing curves 1101 are formed at intervals, and a first flow-directing curve, a second flow-directing curve, a third flow-directing curve, a fourth flow-directing curve, a fifth flow-directing curve and a sixth flow-directing curve are respectively arranged from the inside to the outside of the bending head. The 6 flow-inducing curved channels 1101 are each independently communicated with the second inner passage 1202.

It should be noted that, in an embodiment of the present invention, the first tube 111 and the plurality of guide walls 112 may be integrally formed at one time during the molding process, that is, the first tube 111 and the plurality of guide walls 112 are integrally connected at one time without any obvious interface or need of step-by-step molding, and in another embodiment, the first tube 111 may be formed first and then the plurality of guide walls 112 may be formed outside the first tube 111 during the molding process. Preferably in one piece. It should be noted that, in this embodiment of the present invention, the bending head 11 is described as forming 6 guide walls 112 and forming 6 isolated flow-directing curves 1101, but in other embodiments of the present invention, the bending head 11 may also form guide walls in number and arrangement, such as guide walls in number of 2, 3, 4, 5 and above, in an asymmetric arrangement extending longitudinally, and the present invention is not limited in this respect.

Further, according to the embodiment of the present invention, the bending head 11 includes at least one protection wall 113 disposed at the outer end of the guide wall 112 to prevent the end of the guide wall 112 from directly contacting the outside, for example, to prevent the flat end of the guide wall 112 from directly contacting the intima of the organ of the human body, which may cause an adverse stimulation reaction or damage the intima.

Preferably, the protective wall 113 is arcuately provided at an outer end of the guide wall 112. In other embodiments of the invention, the protective wall 113 may also be of other shapes.

According to this embodiment of the present invention, a plurality of the protection walls 113 are respectively provided at a plurality of the guide wall outer ends, that is, the number of the protection walls 113 and the number of the guide walls are matched. A gap 1130 is formed between two adjacent protective walls 113, and the gap 1130 communicates the flow-guiding curve 1101 with the external space. That is, each of the flow-inducing curves 1101 communicates with the external environment through the corresponding gap 1130.

A plurality of the protection walls 113 are arranged at intervals to form a substantially annular outer surface, that is, a relatively flat arc-shaped surface is integrally formed, instead of the stripe-shaped interval surface directly formed by the end surface of the guide wall. In other words, the stimulation of the guide wall is alleviated by the protective wall 113. The protective walls 113 are arcuately covered on the outside of the guide wall, and a gap 1130 is formed between adjacent protective walls 113, so that the protective guide wall is formed to be inclined toward the circumference in a state where liquid can pass through.

In one embodiment of the present invention, the protective wall 113 extends on both sides of the guide wall, i.e., forming a substantially T-shaped structure, and in another embodiment of the present invention, the protective wall 113 extends on one side of the guide wall in a single direction, i.e., the protective wall 113 and the guide wall form an L-shaped structure, and the present invention is not limited in this respect.

Referring to fig. 7A-7E, one of the procedures for using the curved drainage nephrostomy tube 1 of the present invention is: first, the curved drainage nephrostomy tube 1 is passed through by means of a guide 2, so that the curved drainage nephrostomy tube 1 is in the straightened state 200, i.e. such that the curved head 11 is straightened, after which the curved draining nephrostomy tube 1 is guided by the guide 2 to be inserted into the renal pelvis via the fistulation channel, and, during insertion, the positioning wire 18 can be positioned by imaging means, thereby determining the entering depth of the curved drainage nephrostomy tube 1, after the saccule 12 of the curved drainage nephrostomy tube 1 enters the renal pelvis of the human body, the balloon 12 is inflated by an inflating device, and after the balloon 12 is inflated by a predetermined gas to the inflated state, the guide 2 is then pulled out so that the curved draining nephrostomy tube 1 is in the curved state 100, i.e. the curved head 11 is naturally curved, and then the draining fluid comes out inside the renal pelvis. After the curved draining nephrostomy tube 1 is used, the guide 2 is inserted again, and the curved draining nephrostomy tube 1 is pulled out of the body by the guide 2.

Referring to fig. 8A, in this embodiment of the present invention, the curved drainage nephrostomy tube includes 2 guide walls 112 respectively disposed at both sides of the first tube 111, the two guide walls 112 form two drainage curves 1101, and the openings of the two drainage curves 1101 are the same in size. Further, the two flow-guiding curves 1101 are symmetrically distributed on both sides of the two guide walls 112 when viewed in cross section. The protection walls 113 are correspondingly arranged on the outer sides of the guide walls 112, the gap 1130 is formed between two adjacent protection walls 113, and the gap 1130 influences the size of the space region communicated with the outside.

Referring to fig. 8B, in this embodiment of the present invention, the curved drainage nephrostomy tube includes 4 guide walls 112, which are respectively disposed outside the first tube 111, and the 4 guide walls 112 form 4 drainage curves 1101, and the openings of the drainage curves 1101 have the same size. Further, from a cross-sectional view, 4 of the flow-guiding curves 1101 are distributed axisymmetrically with respect to the first pipe 111. The protection walls 113 are correspondingly arranged on the outer sides of the guide walls 112, the gap 1130 is formed between two adjacent protection walls 113, and the gap 1130 influences the size of the space region communicated with the outside.

Referring to fig. 8C, in this embodiment of the present invention, the curved draining nephrostomy tube includes 5 guiding walls 112, which are respectively disposed outside the first tube 111, and the 5 guiding walls 112 form 5 draining curves 1101, and the openings of the draining curves 1101 are the same in size. Further, when viewed in cross section, 5 of the flow-guiding curves 1101 are distributed symmetrically with respect to the center of the first pipe 111. The protection walls 113 are correspondingly arranged on the outer sides of the guide walls 112, the gap 1130 is formed between two adjacent protection walls 113, and the gap 1130 influences the size of the space region communicated with the outside.

Referring to fig. 8D, in this embodiment of the present invention, the curved drainage nephrostomy tube includes 3 of the guide walls 112, which are respectively disposed outside the first tube 111, and 3 of the guide walls 112 form 3 of the drainage curves 1101, which are respectively a first drainage curve 11011, a second drainage curve 11012, and a third drainage curve 11013. The openings 1101 of each of the flow-inducing curves are different in size. Further, the first flow-directing curve 11011 is located inside the curve, and the second flow-directing curve 11012 and the third flow-directing curve 11013 are located near the outside of the curve. In this embodiment of the invention, the opening 1001 of the first flow-directing curve 11011 is larger than the opening 1002 of the second flow-directing curve 11012, and the opening 1002 of the second flow-directing curve 11012 is larger than the opening 1002 of the third flow-directing curve 11013. That is, the size of the space communicating the flow-inducing curve 1101 with the outside is adjusted by adjusting the size of the space inside the flow-inducing curve 1101.

The protection walls 113 are correspondingly arranged on the outer sides of the guide walls 112, the gap 1130 is formed between two adjacent protection walls 113, and the gap 1130 influences the size of the space region communicated with the outside. Accordingly, the gap 1130 formed by the protective wall 113 of the first conduction curve 11011 is larger than the gap 1130 formed by the protective wall 113 of the second conduction curve 11012, and the gap 1130 formed by the protective wall 113 of the second conduction curve 11012 is larger than the gap 1130 formed by the protective wall 113 of the third conduction curve.

Referring to fig. 8E, in this embodiment of the present invention, the size of the area where the flow-inducing curve 1101 communicates with the outside is adjusted by adjusting the width of the protective wall 113 to adjust the size of the gap 1130 formed.

In this embodiment of the present invention, the curved draining nephrostomy tube includes 5 guiding walls 112, which are respectively disposed outside the first tube 111, 5 guiding walls 112 forming 5 draining curves 1101, the opening size of 1101 of each draining curve is the same, and the gap 1130 is different in size. Further, when viewed in cross section, 5 of the flow-guiding curves 1101 are distributed symmetrically with respect to the center of the first pipe 111. The protection walls 113 are correspondingly arranged on the outer sides of the guide walls 112, the gap 1130 is formed between two adjacent protection walls 113, and the gap 1130 influences the size of the space region communicated with the outside.

From right to left in the figure, corresponding to the inside and outside of the curve, respectively. The gap 1130 formed by the flow-directing curved pipe 1101 positioned on the inner side of the curved pipe is larger than the gap 1130 formed by the flow-directing curved pipe 1101 positioned on the outer side of the curved pipe, and the sizes of the gaps 1130 formed for the flow-directing curved pipes 1101 positioned on the upper and lower sides are the same. That is, clockwise from the right side, the first flow-directing curve, the second flow-directing curve, the third flow-directing curve, the fourth flow-directing curve, and the fifth flow-directing curve are defined, a gap 1130 formed by the first flow-directing curve is larger than a gap 1130 formed by the second flow-directing curve, a gap 1130 formed by the second flow-directing curve is larger than a gap 1130 formed by the third flow-directing curve, a gap 1130 formed by the second flow-directing curve and a gap 1130 formed by the fifth flow-directing curve are the same in size, and a gap 1130 formed by the third flow-directing curve and a gap 1130 formed by the fourth flow-directing curve are the same in size.

Fig. 9A-9B are variations of the guard wall of the bending head according to the second embodiment of the invention.

Referring to fig. 9A, in this embodiment of the present invention, the curved drainage nephrostomy tube includes 4 guide walls 112, which are respectively disposed outside the first tube 111, 4 guide walls 112 forming 4 drainage curves 1101, and openings 1001 of the drainage curves 1101 are the same in size. Further, from a cross-sectional view, 4 of the flow-guiding curves 1101 are distributed axisymmetrically with respect to the first pipe 111.

The protection walls 113 are correspondingly arranged on the outer sides of the guide walls 112, the gap 1130 is formed between two adjacent protection walls 113, and the gap 1130 influences the size of the space region communicated with the outside.

The protection wall 113 extends transversely or arcuately from the outside of the guide wall 112, and a plurality of the protection walls 113 extend in the same direction, for example, all extend arcuately in a counterclockwise direction or arcuately in a clockwise direction, so that a plurality of the gaps 1130 formed thereby have the same size.

Referring to fig. 9B, in this embodiment of the present invention, the curved drainage nephrostomy tube includes 4 guide walls 112, which are respectively disposed outside the first tube 111, and the 4 guide walls 112 form 4 drainage curves 1101, and the openings 1001 of the drainage curves 1101 are the same size. Further, from a cross-sectional view, 4 of the flow-guiding curves 1101 are distributed axisymmetrically with respect to the first pipe 111.

The protective wall 113 is provided on the outer side of each guide wall 112. And each of the protection walls 1130 extends unidirectionally, that is, the protection wall 113 extends to one side from the guide wall 112. And the extending directions of two adjacent protection walls 113 are opposite. Thereby forming different openings and gaps. Starting from the right, clockwise in fig. 9B, the first gap 1130 in the transverse direction is the same as the third gap 1130 in the symmetrical direction and is relatively small, and the second gap 1130 and the fourth gap 1130 in the longitudinal direction are the same and larger than the transverse gap.

Referring to fig. 9C, in this embodiment of the present invention, the curved drainage nephrostomy tube includes 4 guide walls 112, which are respectively disposed outside the first tube 111, 4 guide walls 112 forming 4 drainage curves 1101, and openings 1001 of the drainage curves 1101 are the same in size. In this embodiment of the invention, the protective wall 113 is not provided, i.e. the flow-guiding curve 1101 is directly connected to the outside via the opening 1001.

In this embodiment of the present invention, the guiding wall 112 of the bending head has at least one micro hole 1120, and the micro hole is connected to both sides of the guiding wall 112, that is, the micro hole 1120 is a through hole. The micro-holes 1120 communicate with two adjacent flow-guiding curves 1101.

It should be noted that, in this embodiment of the present invention, the plurality of micropores 1120 are arranged in a predetermined layout, and the plurality of micropores 1120 communicate with two adjacent drainage curves 1101, so that the gas and the liquid in the two drainage curves 1101 can be communicated, and therefore, the micropores 1120 further prevent the individual drainage curves 1101 from forming a closed space when the layout is blocked, that is, even if there is a blood clot in a local position, the liquid or the gas passing through the micropores 1120 will not adhere to the surface of the guide wall 112 firmly, thereby reducing the blocking situation for a long time.

In one embodiment of the present invention, the micro holes 1120 may be selectively formed on the guide walls 112, that is, not all of the guide walls 112 need to be formed with the micro holes 1120. The number and arrangement of the micro-holes 1120 are not limitations of the present invention.

The using effect tests of the common nephrostomy tube and the curve drainage nephrostomy tube of the invention are compared:

the bend drainage nephrostomy tube with the size and the model of 18F is manufactured in a 3D printing mode, and the bend drainage nephrostomy tube is compared with a common silica gel nephrostomy tube with the same model of 18F in a drainage test.

1. And (5) conducting drainage comparison by pure water.

Two bottles of 350ml of liquid water are respectively drained by a common silica gel nephrostomy tube of 22F and a curved drainage nephrostomy tube of 22F. The completion time of the drainage of a common silica gel nephrostomy tube of 22F is 30 seconds. The drainage completion time of the curved drainage nephrostomy tube is 32 seconds.

2. And (4) carrying out drainage comparison on the normal saline containing the blood clots.

50ml of blood was added to 50ml of normal saline, left to stand for 15 minutes, and the drainage test was started after the blood clot was formed.

The 22F silicone kidney fistulae were blocked by the blood clot within 5 seconds with little fluid drainage.

The 22F curved drainage nephrostomy tube drained 50ml of fluid in 26 seconds.

Through comparative tests, the external drainage renal fistula for operation disclosed by the invention has the same drainage effect with a common renal fistula of the same type when draining liquid, such as pure water. However, for the liquid containing blood coagulation, especially when the blood coagulation is more, the common silica gel nephrostomy tube is easy to be blocked, and the external drainage nephrostomy tube for operation of the invention has better drainage effect and can prevent the blockage to a certain extent. It should be noted that the curved head 11 of the curved drainage nephrostomy tube according to the present invention has a plurality of drainage curved channels 1101, and the guide wall forming the drainage curved channels 1101 extends radially outward, that is, drainage positions are formed on the entire circumference and at different heights of the curved head, and the guide wall 112 has a certain supporting function, and when a blood clot reaches the end face of the drainage sheet, the blood clot is blocked by the drainage surface, so that even if the blood clot occurs, all drainage areas of all the drainage curved channels 1101 will not be blocked, that is, the whole blockage phenomenon will not occur, while a normal nephrostomy tube is easily blocked by the blood clot due to only two small holes that can be entered.

It will be appreciated by persons skilled in the art that the embodiments of the invention described above and shown in the drawings are given by way of example only and are not limiting of the invention. The objects of the invention have been fully and effectively accomplished. The functional and structural principles of the present invention have been shown and described in the examples, and any variations or modifications of the embodiments of the present invention may be made without departing from the principles.

Claims

1. Bend drainage kidney fistulization pipe, its characterized in that includes:

2. The curved drainage nephrostomy tube of claim 1 wherein said drainage curve has an opening communicating with the outside and a communication hole communicating with said second internal channel of said balloon.

3. The curved flow-inducing nephrostomy tube of claim 1 including a first tube and a plurality of guide walls, each of said guide walls being disposed radially outwardly of said first tube, adjacent ones of said guide walls defining said flow-inducing curve.

4. The curved drainage nephrostomy tube of claim 1 including a first tube and a plurality of guide walls symmetrically disposed about an exterior of the first tube.

5. The curved draining nephrostomy tube of claim 4 wherein said guide wall has at least one aperture communicating between two adjacent said draining curves.

6. The curved draining nephrostomy tube of claim 1 wherein said curved head end is tapered.

7. The curved drainage nephrostomy tube of any one of claims 1-6 including a positioning line disposed along the extension body.

8. The curved drainage nephrostomy tube as claimed in any one of claims 1 to 6, wherein said curved head includes a protective wall disposed arcuately outwardly of said guide wall, a gap being defined between adjacent ones of said walls, said gap communicating between the interior and exterior of said drainage curve.

9. The curved draining nephrostomy tube of any one of claims 1 to 6, wherein one of said draining curves is located in an inner curve of said bending head and the other of said draining curves is located in an outer curve of said bending head.

10. The curved draining nephrostomy tube of claim 4 or 5 wherein the number of said guide walls is selected from 2, 3, 4, 5, 6 or 7.