CN113599671B

CN113599671B - Guidable catheter for operation

Info

Publication number: CN113599671B
Application number: CN202110502139.6A
Authority: CN
Inventors: 严泽军; 程跃; 蒋军辉
Original assignee: Ningbo First Hospital
Current assignee: Jiangsu Beihuan Biological Technology Co ltd
Priority date: 2021-05-08
Filing date: 2021-05-08
Publication date: 2023-02-03
Anticipated expiration: 2041-05-08
Also published as: CN113599671A

Abstract

The invention provides a guidable surgical catheter, which comprises a front catheter section, a rear catheter section, a bending part and a guide channel, a guide outlet, at least one drainage groove and at least one guide inlet, wherein the front catheter section is provided with a connecting end and an opposite end, the drainage groove is arranged on an outer surface of the front catheter section in an opening mode and extends from the position of the guide inlet towards the end of the front catheter section so as to allow fluid in front of and at the side of the catheter to be guided to extend, the drainage groove is guided to the guide inlet and then moves to the guide outlet along the guide channel towards the rear catheter section, and at least one part of the front catheter section close to the end is arranged to be bent to form the bending part.

Description

Guidable catheter for operation

Technical Field

The invention relates to the field of medical instruments, in particular to a guidable catheter for surgery.

Background

Catheterization is widely used in clinical applications, requiring insertion of a urinary catheter into the bladder to direct urine through the catheter to the outside of the body. A catheter 1P of the type that is currently available is shown in fig. 1, and has a balloon 10P and at least one side drainage opening 20P formed near the end. When the catheter 1P is inserted into the proper position and inflated towards the balloon 10P, the balloon 10P can provide hemostasis by compression and a certain fixation to reduce bleeding from the patient and reduce the possibility of the catheter 1P slipping out. The catheter 1P is a hollow tube to form a drainage channel 30P, wherein the side drainage opening 20P is located at one side of the drainage channel 30P and communicates with the drainage channel 30P to drain the urine in the bladder to the drainage channel 30P and then to the outside of the body.

A problem exists in that the patient may become fouled in the body after surgery, and the catheter 1P will be rendered inoperable once the fouling blocks the side drainage openings 20P with the urine flow. Designing the side drainage apertures 20P to be larger in caliber is a possible solution. However, the fact that the end of the catheter 1P extends into the bladder, if the length of the end of the catheter 1P is too long, may irritate the bladder wall, which undoubtedly limits the size of the end of the catheter 1P, and also limits the size of the side drainage openings 20P in a variable way, so that the side drainage openings 20P cannot be opened larger without increasing the irritation of the bladder.

Disclosure of Invention

It is an object of the present invention to provide a surgical guidable catheter which is capable of draining urine in the bladder while minimizing the occurrence of clogging problems caused by foreign matter such as blood stasis.

It is another object of the present invention to provide a surgical guidable catheter wherein the portion of the catheter extending into the bladder can be designed to be as long as possible, providing more points for urine to flow in while not irritating the bladder.

It is another object of the present invention to provide a surgical guidable catheter that provides increased location inflow for urine so that when some locations become blocked, other locations can also function as a urinary catheter, thereby reducing the chance of an overall blockage.

It is another object of the present invention to provide a surgical guidable catheter that reduces the chance of congestion at the catheter inlet by splitting the congestion.

It is another object of the present invention to provide a surgical guidable catheter wherein the catheter is capable of minimizing bulk extravasation while delivering minimized extravasation into the body to reduce the chance of clogging of the catheter.

According to one aspect of the present invention, there is provided a guidable surgical catheter, wherein the guidable surgical catheter comprises a front catheter section, a rear catheter section, a curved section, and a guide channel, a guide outlet, at least one drainage groove, and at least one guide inlet, wherein the front catheter section has a connecting end and an opposite end, the connecting end of the front catheter section extends to the rear catheter section, wherein the guide channel is formed on the rear catheter section and is respectively communicated with the guide inlet and the guide outlet, the drainage groove is opened on an outer surface of the front catheter section and extends from the guide inlet to the end of the front catheter section to allow fluid guiding in front and lateral directions of the catheter to extend from the guide inlet, the drainage groove is guided to the guide inlet and then moves along the guide channel to the guide outlet toward the rear catheter section, and wherein at least a portion of the front catheter section close to the end is configured to be curved to form the curved section.

According to one embodiment of the invention, the number of the drainage slots is plural and arranged at intervals, at least part of at least one of the drainage slots being located at the bend to provide a curved flow-guiding region.

According to one embodiment of the invention said drainage grooves are arranged at a predetermined distance from said end of said front catheter section to allow said end of said front catheter section to be arranged closed.

According to an embodiment of the invention said drainage groove of said catheter is arranged such that said drainage inlet position extends linearly along the extension of said catheter towards said end of said catheter.

According to an embodiment of the invention, the drainage groove of the catheter is arranged to extend from the drainage inlet position towards the end of the catheter spirally along the extension direction of the catheter.

According to an embodiment of the invention, the rear catheter section has an extended end and an opposite initial end, the extended end is connected to the connecting end of the front catheter section, the diversion outlet is located at the initial end, the diversion inlets are multiple and arranged at the extended end, each diversion inlet corresponds to one drainage groove and is located in the extending direction of the drainage groove.

According to an embodiment of the invention, the front catheter section comprises a support column and at least two extending wings, the extending wings extend outwards from the peripheral sides of the support column, and one drainage groove is formed between two adjacent extending wings, and at least one flow guide inlet is arranged on the support column of the front catheter section to communicate the drainage groove with the flow guide channel.

According to one embodiment of the invention, the catheter has a start end, an opposite end and a guide channel extending between the start end and the end, wherein the guide channel allows insertion of a guide for guiding the catheter.

According to an embodiment of the invention, said catheter further comprises a balloon and a balloon having a gas channel, said balloon being arranged at said rear section of said catheter, said flow guide inlet being arranged close to said end of said front section of said catheter relative to said balloon, wherein said balloon is arranged in communication with said gas channel to allow inflation of said balloon by means of said gas channel.

<xnotran> , , , , , , , , , , , , , , , , , , , , , </xnotran> An irrigation inlet and an irrigation outlet, said irrigation channel communicating with said irrigation inlet and said irrigation outlet respectively, said irrigation outlet being disposed at said starting end of said rear catheter section, said irrigation inlet being disposed at said support post of said front catheter section and being disposed at a backside of said bending section to allow irrigation in other directions away from the direction of bending of said catheter, wherein the length of said drainage groove at said backside of said bending section is set longer than the length of said drainage groove at other positions, wherein said front catheter section comprises a support post and at least two extension wings, said extension wings extending from a peripheral side of said support post and one said drainage groove being formed between two adjacent said extension wings, at least one said drainage inlet being disposed at said support post of said front catheter section to conduct said drainage groove and said drainage channel wherein said catheter has a plurality of grooves and said grooves being disposed at said extension wings to communicate two adjacent said drainage grooves, wherein said extension wings comprise an extension sidewall and an extension peripheral wall, said extension sidewall extending outwardly from said support post, said extension sidewall extending between said extension wings, said extension wings being configured such that the cross-sectional area of said extension wings is reduced relative to the cross-sectional area of said catheter extending peripheral wall when said small-shaped catheter block is exposed to a small-type blood.

Drawings

Fig. 1 is a schematic view of a current urinary catheter application.

Fig. 2A is a schematic view of a surgical guidable catheter according to a preferred embodiment of the present invention.

Fig. 2B is a schematic view of another state of the surgical guidable catheter according to the above-described preferred embodiment of the present invention.

Fig. 3A to 3E are schematic views illustrating the application of a urinary catheter kit including the surgical guidable catheter according to a preferred embodiment of the present invention.

Fig. 4A is a schematic view of the surgical guidable catheter according to another preferred embodiment of the present invention.

Fig. 4B is a schematic view of another state of the surgical guidable catheter according to the above-described preferred embodiment of the present invention.

Fig. 5 is a schematic view of the surgical guidable catheter according to another preferred embodiment of the present invention.

Fig. 6A is a schematic view of the surgical guidable catheter according to another preferred embodiment of the present invention.

Fig. 6B-6C are schematic views of the surgical guidable catheter according to the above preferred embodiment of the present invention.

Fig. 7 is a schematic view of the surgical guidable catheter according to another preferred embodiment of the present invention.

Fig. 8 is a schematic view of the surgical guidable catheter according to another preferred embodiment of the present invention.

Fig. 9 is a schematic view of the surgical guidable catheter according to another preferred embodiment of the present invention.

Fig. 10 is a schematic view of the surgical guidable catheter according to another preferred embodiment of the present invention.

Fig. 11 is a schematic view of the surgical guidable catheter according to another preferred embodiment of the present invention.

Fig. 12 is a laboratory representation of the surgical guidable catheter and a conventional catheter according to a preferred embodiment of the present invention.

Fig. 13 is an experimental schematic view of the surgical guidable catheter and a conventional catheter according to the above preferred embodiment of the present invention.

Detailed Description

The following description is provided 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 "at least one" or "one or more," i.e., that a quantity of one element may be one in one embodiment, while a quantity of another element may be plural in other embodiments, and the terms "a" and "an" should not be interpreted as limiting the quantity.

Referring to fig. 2A to 3E, a surgical guidable catheter 1 and a catheterization kit 1000 according to a preferred embodiment of the present invention are illustrated. The surgical guidable catheter 1 is suitable for catheterization, and is particularly suitable for application in situations where catheterization is required for postoperative bleeding of a patient, and for the sake of brevity, the "surgical guidable catheter" is simply referred to as the "catheter". The catheter 1 can reduce the problem of clogging during catheterization and can also reduce irritation of the bladder. The urinary catheter kit 1000 comprises the urinary catheter 1 and at least one guide member 2, wherein the guide member 2 may be a guide wire or an inner core or the like, and is adapted to guide the urinary catheter 1 into the body, although it is understood that the urinary catheter 1 may be directly catheterized in some application scenarios.

In detail, the catheter 1 comprises a front catheter section 10 and a rear catheter section 20, wherein the front catheter section 10 is connected to the rear catheter section 20, the front catheter section 10 is suitable for being inserted into the bladder, and the rear catheter section 20 is suitable for guiding urine from the bladder to the outside.

The urinary catheter 1 has at least one drainage groove 100, a guide channel 200 and a guide channel 300, wherein the drainage groove 100 is used for draining the urine in the bladder to the guide channel 300 of the urinary catheter 1, and wherein the guide channel 200 is used for at least one guide member 2 to pass through.

The drainage groove 100 is arranged on the front catheter section 10, and the diversion channel 300 is arranged on the rear catheter section 20. The urinary catheter 1 has at least one flow guiding inlet 110, wherein the flow guiding inlet 110 is arranged in the front catheter section 10, and urine enters the flow guiding channel 300 after passing through the flow guiding inlet 110.

The guide channel 200 is provided in the front catheter section 10 and the rear catheter section 20, the guide channel 200 is adapted to accommodate the guide member 2, wherein the guide member 2 can be an inner core or a guide wire to feed the catheter 1 to a predetermined position via the guide member 2. It is understood that the guide channel 200 may be independent of the guide channel 300, or that the guide channel 300 forms at least part of the guide channel 200 at the position of the rear catheter section 20.

Further, the guide 2 extends through the catheter 1 when the guide 2 guides the catheter 1 into the body. The front catheter section 10 has a tip 101 and a connecting end 102, wherein the tip 101 is the tip of the catheter 1 and the connecting end 102 is adapted to be connected to the rear catheter section 20. In this embodiment, the guide channel 200 is closed at the position of the end 101 of the front section of the catheter 10, and in use, the end 101 of the front section of the catheter 10 can be cut away to expose the guide channel 200. Alternatively, a needle-like sharp object is used to puncture the end 101 of the front section 10 of the catheter to expose the guide channel 200. It is of course understood that in another embodiment of the invention, said guide channel 200 may directly pass through said front catheter section 10 and said rear catheter section 20 of said catheter 1, i.e. said guide channel 200 may be directly visible at said end 101 of said front catheter section 10. In addition, when the guide member 2 is removed, the guide passage 200 may also play a role in guiding flow.

Further, the front catheter section 10 has an outer surface 103, wherein at least a portion of the outer surface 103 is recessed inwardly to form the drainage groove 100, and the drainage groove 100 extends in the radial direction of the catheter 1 and to the connection between the front catheter section 10 and the rear catheter section 20 to communicate with the drainage channel 300. In other words, in this embodiment, the drainage channels 100 of the catheter 1 are arranged to be open. The outer surface 103 of the front catheter section 10 is directly exposed to the bladder and contacts with urine in the bladder, and urine can be guided along the outer surface 103 of the front catheter section 10 where the drainage grooves 100 are formed toward the guide channel 300 of the rear catheter section 20.

Optionally, the drainage channel 100 is arranged to extend from the end 101 of the front catheter section 10 to the connecting end 102. It will of course be understood that the drainage channels 100 may also extend from the connecting end 102 toward the end 101 and not to the end 101.

In other words, the outer surface 103 of the front catheter section 10 comprises a peripheral wall 1031 and an end surface 1032, wherein the peripheral wall 1031 is connected to the end surface 1032, the peripheral wall 1031 is located at the side, the end surface 1032 extends to form at one end of the peripheral wall 1031, the drainage grooves 100 can be formed in the peripheral wall 1031, or extend to the end surface 1032, for example, one drainage groove 100 can be communicated with the other drainage groove 100.

In this way, the front section 10 of the catheter 1 provides as many locations as possible for the urine to flow through, and if one location is blocked, the drainage groove 100 can be arranged longer, so that the urine can flow through the drainage groove 100 at other locations.

Further, in this embodiment, the number of the drainage grooves 100 is multiple and the drainage grooves 100 are arranged circumferentially, and after one drainage groove 100 is blocked, the other drainage groove 100 can continue to drain.

It should be noted that the drainage grooves 100 of the catheter 1 not only serve to drain blood, but also serve to reduce large-sized aggregates such as blood stasis in the bladder.

In detail, for the urinary catheter 1, the most easily blocked position is the position of the diversion inlet 110, after the position of the diversion inlet 110 corresponding to one drainage groove 100 is blocked, the position of the diversion inlet 110 corresponding to another drainage groove 100 can also continue diversion, but the transmission efficiency of the urinary catheter 1 is affected.

In this embodiment, the front catheter section 10 comprises a support column 11 and at least two extension wings 12, wherein the extension wings 12 extend outward from the support column 11, the support column 11 is hollow to form the guide channel 200, the drainage groove 100 is formed between two adjacent extension wings 12, and the extension wings 12 are arranged around the support column 11 at intervals.

When a large lump of blood stasis is attracted to the front catheter section 10 along with urine and adheres to the surface of the extension wing 12, as the blood stasis continues to move towards the position of the flow guide inlet 110 of the rear catheter section 20 and the front catheter section 10, the extension wing 12 with certain strength and thin shape can separate the blood stasis into smaller specifications, so that the specification of the separated blood stasis does not exceed the size of the flow guide groove 100, and the blood stasis has a chance to pass through the flow guide inlet 110 to enter the flow guide channel 300 and be smoothly discharged.

It is understood that the extension wing 12 can divide the large congestion into the small congestion, which does not mean that the edge of the extension wing 12 needs to be designed to be very sharp, and the edge of the extension wing 12 can also divide the large congestion into the small congestion when designed to be smooth. In this embodiment, the edges of the extension wings 12 are designed to be rounded in order to avoid injury to the body tissue when the catheter 1 is introduced into the body.

In addition, it should be noted that in this embodiment, the drainage channel 100 extends directly to the end 101 of the front catheter section 10, so that the extension wings 12 are exposed directly at the end. During the process of the urinary catheter 1 entering the urinary bladder, the extending wing 12 at the most front end is in direct contact with the human tissue and has the function of first spreading the human tissue, therefore, the end 101 of the urinary catheter 1 needs to be rounded to reduce the possibility that the extending wing 12 may cause damage to the human mucosa. Optionally, the end 101 of the catheter 1 is arranged bullet-shaped and bullet-shaped with spaced grooves.

Further, the catheter is capable of forming a bend 30. In detail, the front catheter section 10 of the catheter 1 can be bent to form the bending part 30 to reduce the irritation to the inner wall of the bladder.

In use, the guide wire or other guide member 2 is first inserted into the bladder, then inserted along the guide wire into the catheter 1, and then withdrawn. After the guide wire is pulled out, the front catheter section 10 of the catheter 1 which loses the support of the guide wire is automatically bent to form the bending part 30. With the end 101 of the front catheter section 10 of the catheter 1 as the center, the other part of the front catheter section 10 is bent into a loop around the end 101 to form the bending part 30.

After the bent portion 30 is formed, the drainage groove 100 is still left open and is changed from a straight shape to a curved shape, so that the sludge and the like are more easily differentiated into a smaller volume at the position of the extension wing 12.

In this embodiment, at least part of the front catheter section 10 can be made as a tray, and since the drainage grooves 100 are distributed on each circle of the front catheter section 10, drainage can be entered in each circle and the problem of blockage can be effectively prevented. Because the front section 10 of the catheter is naturally curved in the bladder, the drainage channel 100 extends in multiple directions to reduce the possibility of the channel 100 becoming blocked.

Further, the catheter 1 further comprises a balloon 40, wherein the balloon 40 is arranged at the rear catheter section 20, so that after the guide wire is pushed out of the catheter 1, the front catheter section 10 can be kept in the bladder by the inflated balloon 40, and the patient can avoid the catheter 1 from falling out of the body during activities.

In detail, the urinary catheter 1 has a gas channel 400, wherein the gas channel 400 is arranged at the rear catheter section 20 of the urinary catheter 1 and is in communication with the balloon 40. Said rear catheter section 20 has an extended end 201 and an initial end 202, wherein said initial end 202 of said rear catheter section 20 and said end 101 of said front catheter section 10 are both ends of said catheter 1, respectively, said extended end 201 of said rear catheter section 20 is connected to said connecting end 102 of said front catheter section 10, and wherein said air channel 400 extends between said extended end 201 and said initial end 202 of said rear catheter section 20. Fluid, such as gas or saline, can be supplied to the bladder 40 through the gas passage 400, and can be discharged from the bladder 40.

The flow guide inlet 110 of the urinary catheter 1 is positioned above the balloon 40, and urine is collected into the flow guide channel 300 above the balloon 40.

For the rear catheter section 20, a two-channel design, the flow guide channel 300 may be a middle channel, and the air channel 400 may be arranged on one side of the middle channel.

Further, the urinary catheter 1 can also have a fluid port 120 and a fluid outlet 130, wherein the fluid port 120 is conductively connected to the air channel 400 and adapted to be connected to a syringe for filling with fluid, the other port is the fluid outlet 130 and the fluid outlet 130 is conductively connected to the fluid channel 300 and adapted to be connected to a urine collector, and the two ports are arranged at the starting end 202 of the rear catheter section 20 for operation outside the body of a user.

It should be noted that a one-way valve may be disposed at the fluid interface 120 communicating with the gas channel 400, and when the syringe is inserted into the fluid interface 120, the fluid in the gas channel 400 may be discharged outwards through the one-way valve. Otherwise, when the syringe is pulled out from the fluid port, the one-way valve automatically closes the gas channel 400 to prevent the fluid in the gas channel 400 from flowing out through the fluid port 120.

Further, the catheters B made of silica gel in this example of ordinary 18F silica gel catheters a and 18F were compared.

The experimental steps are as follows:

(1) the catheters A and B are respectively inserted into a 350ml mineral water bottle, and the relative postures of the mineral water bottle and the catheters A and B are adjusted to ensure that the catheters A and B can respectively smoothly guide the flow after most of water is filled in the bottle. The mineral water bottle is plugged with a syringe needle as a vent and the mineral water bottle mouth is provided with a rubber glove to maintain the tightness after insertion of said catheter a or B.

The experimental result shows that: the time for completing drainage of the common 18F silica gel urinary catheter A is 36 seconds; the drainage completion time of the 18F silicone urinary catheter B in this example was 38 seconds.

(2) The difference from the above steps is that 50ml of blood is added into 50ml of normal physiological saline to obtain a mixed fluid, the mixed fluid is placed into a mineral water bottle, and is kept stand for 15 minutes, and a drainage experiment is started after blood clots are formed.

Referring to fig. 12 and 13, the experimental results show that: the common 18F silica gel catheter A can not complete drainage, blood clots are blocked, and no fluid flows out; the time required for the drainage of the 18F silicone urinary catheter B in this example to be completed is 31 seconds.

(3) The difference from the above steps is that in the fluid in the mineral water bottle, 20ml of blood was added to 80ml of normal physiological saline to obtain a mixed fluid, the mixed fluid was placed in the mineral water bottle, left standing for 15 minutes, and the drainage test was started after blood clots were formed.

The experimental result shows that: the ordinary 18F silica gel catheter A needs 5min for completing drainage, and the flow is very small in the middle time; the time required for the drainage of the 18F silicone urinary catheter B in this example to be completed is 19 seconds. In conclusion, this embodiment provides a catheter B that reduces the chance of blockage relative to the catheter a.

Referring to fig. 4A and 4B, the catheter 1 according to another preferred embodiment of the invention is illustrated.

In this embodiment, the catheter 1 is provided with an irrigation function. In detail, the urinary catheter 1 has at least one irrigation channel 500 and at least one irrigation port 501, wherein the irrigation port 501 is communicated with the irrigation channel 500 and arranged at the starting end 202 of the rear catheter section 20.

The catheter 1 has at least one irrigation outlet 502, wherein the irrigation outlet 502 is arranged at the junction of the front catheter section 10 and the rear catheter section 20, either at the front catheter section 10 or at the rear catheter section 20.

The irrigation channel 500 extends from the irrigation port 501 along the rear section 20 of the catheter to the location of the irrigation outlet 502 for providing fluid inward through the irrigation outlet 502 for irrigation.

The flush outlet 502 location may be disposed proximate to the diversion inlet 110 location. When the blockage of the position of the diversion inlet 110 is serious, the fluid can be injected through the flushing channel 500 to flush the diversion inlet 110, so as to reduce the blockage. The fluid flushed inward may enter the guide passage 300 through the guide inlet 110 to be discharged.

In this embodiment, the number of the flushing channels 500 and the flushing ports 501 is one, and it is understood that the number of the flushing channels 500, the flushing ports 501 and the flushing outlets 502 may be one, two, three or more, and the flushing channels 500, the flushing ports 501 and the flushing outlets 502 do not need to correspond to one another. For example, the flushing channel 500 may be configured with two flushing ports 501 or two flushing outlets 502.

Referring to fig. 5, the catheter 1 according to another preferred embodiment of the invention is shown schematically. In this embodiment, the end 101 of the front catheter section 10 of the catheter 1 is arranged to be open, such that the guide channel 200 is directly exposed. In detail, in this embodiment, the guide channels 200 extend at both ends of the catheter 1 and are directly visible at both ends of the catheter 1, and in use, the end 101 of the front catheter section 10 of the catheter 1 is directly inserted along the guide 2.

It will be appreciated that the guide channel 200 is not essential for the catheter 1, and that the catheter 1 may be without the guide channel 200, as shown in fig. 6A to 6C, and that the catheter 1 may be inserted directly into the catheter.

Referring to fig. 7, the catheter 1 according to another preferred embodiment of the invention is shown schematically. The difference between this embodiment and the above embodiments is mainly the location of the diversion inlet 110. In the above described embodiment, the guide inlet 110 is arranged at the extended end 201 of the rear catheter section 20. In this embodiment, the flow guide inlet 110 is arranged in the front catheter section 10 close to the junction of the front catheter section 10 and the rear catheter section 20 of the catheter 1.

In detail, in this embodiment, the diversion inlet 110 is disposed on the support column 11 of the front catheter section 10, and the drainage groove 100 is located outside the diversion inlet 110. When urine or impurities in urine need to enter the diversion channel 300, the urine or impurities in urine need to pass through the drainage groove 100 and then enter the diversion channel 300 through the diversion inlet 110.

Urine drained along the drainage groove 100 needs to be sucked into the drainage inlet 110 after turning, and in the process, if large blood clots or impurities exist, a certain impact force can be given to the urine, so that the urine becomes small.

In the above-described embodiment, the guide inlet 110 is disposed in the direction of the drainage groove 100, and in the present embodiment, the guide inlet 110 is disposed at the side of the drainage groove 100, so that the flow direction of urine needs to be changed before entering the guide channel 300. It will be appreciated that the flow guide inlets 110 may be designed larger such that a portion of the flow guide inlets 110 are located in the direction of the flow guide slots 100 and a portion of the flow guide inlets 110 are located on the sides of the flow guide slots 100. When urine is drained along the urinary catheter 1, a part of urine is directly drained from the side to the diversion inlet 110, and a part of urine is drained along the drainage groove 100 to the diversion inlet 110.

Referring to fig. 8A, the catheter 1 according to another preferred embodiment of the invention is illustrated.

The main difference between this embodiment and the previous embodiments is the arrangement of the drainage slots 100.

In detail, the urinary catheter 1 has the guide inlet 110, the guide channel 300 and the drainage groove 100, wherein the guide inlet 110 is arranged at a predetermined position of the urinary catheter 1, so that the guide inlet 110 is located in the bladder when the urinary catheter 1 is inserted into the bladder. The guide inlet 110 is connected to the guide channel 300 and the guide channel 300 extends from the starting end 202 of the urinary catheter 1 towards the end 101 for a predetermined distance. The guide channel 300 is an intermediate channel, and the guide inlet 110 is adapted to communicate the bladder with the guide channel 300.

The drainage channel 100 is arranged to extend from the location of the drainage inlet 110 towards the end 101 of the urinary catheter 1. In the above described embodiment, each of said drainage channels 100 is arranged to extend from said location of said drainage inlet 110 to said end 101 of said urinary catheter 1, and each of said drainage channels 100 is parallel to each other with the end positions in the same plane.

In this embodiment, the drainage slots 100 are arranged to be non-planar. In detail, one of said drainage channels 100 extends from said flow guide inlet 110 towards said end 101 of said urinary catheter 1 with a length L1, one of said drainage channels 100 extends from said flow guide inlet 110 towards said end 101 of said urinary catheter 1 with a length L2, and one of said drainage channels 100 extends from said flow guide inlet 110 towards said end 101 of said urinary catheter 1 with a length L3, wherein L1 is not equal to L2 nor L3, for example L1 is greater than L2 and L2 is greater than L3. In other words, the front section 10 of the catheter is not completely slotted, and the drainage channels 100 are long and short.

When the bending part 30 of the urinary catheter 1 is formed, since the drainage grooves 100 are arranged to be uneven in length, the risk of the entire drainage groove 100 being blocked is dispersed.

It will be understood that in this embodiment, the portion of each of the flow directing inlets 110 of each of the flow directing slots 100 is in the same plane, and in other embodiments of the present invention, as shown in FIG. 8B, the portion of each of the flow directing inlets 110 of each of the flow directing slots 100 may be disposed in a non-planar manner. For example, the drainage channels 100 can be arranged to extend from the end 101 of the catheter 1 towards the connecting end 102 of the front section 10 of the catheter, respectively, and not for the same length. That is, each of the drainage grooves 100 may communicate with the flow guide channel 300 at different positions.

Further, in this embodiment, the drainage groove 100 is not slotted to the end 101 of the front catheter section 10, the surface of the end 101 is designed to be a rounded surface, and the whole end 101 can be bullet-shaped.

Further, when the catheter 1 is formed with the bent portion 30, the drainage grooves 100 having a longer length are located outside the bent portion 30, and the drainage grooves 100 having a shorter length are located inside the bent portion 30. At this time, the drainage groove 100 located outside the bending portion 30 is not affected by the bending of the urinary catheter 1, normal drainage is maintained, and the drainage groove 100 is in a bent state due to the bending of the urinary catheter, so as to better separate blood clots.

Referring to fig. 9, said catheter 1 according to another preferred embodiment of the invention is illustrated. This embodiment differs from the embodiment shown in fig. 2 mainly in the front section of the catheter 10.

Referring to fig. 2, in detail, the catheter 1 comprises the front catheter section 10 and the rear catheter section 20 and has at least one drainage groove 100, one flow guide channel 300 and at least one flow guide inlet 110.

The front catheter section 10 comprises the support column 11 and a plurality of extension wings 12, and in the above embodiment, the extension wings 12 are arranged in a flat shape and extend directly outwards from the side of the support column 11. The cross-section of the extension wings 12 in the cross-sectional direction of the catheter 1 may be linear or similar to linear.

In this embodiment, the section of the extension wings 12 in the cross-sectional direction of the catheter 1 may be T-shaped. In detail, the extending wing 12 includes an extending sidewall 121 and an extending peripheral wall 122, wherein the extending sidewall 121 extends outward from the supporting pillar 11, for example, extends along a radial direction, and the extending sidewall 121 extends between the supporting pillar 11 and the extending peripheral wall 122. The supporting column 11 and the extending peripheral wall 122 are respectively located at both side ends of the extending side wall 121. The extension peripheral wall 122 extends substantially in the circumferential direction and both sides of the extension peripheral wall 122 are provided to extend inward. As can be seen from the sectional view, the cross section of the extension peripheral wall 122 is arc-shaped, and is arc-shaped protruding outward. Since both side edges of the extended peripheral wall 122 are disposed inward, most of the surface of the extended peripheral wall 122 contacting human tissue during the process of entering or withdrawing is smooth rather than narrow side edges which may be used for dividing stagnant blood, thereby reducing the risk of injury to human tissue on the one hand, and enabling the side edges of the extended peripheral wall 122 to be designed thinner or sharper on the other hand, so that stagnant blood can be divided more easily.

It should be noted that the front catheter section 10 and the rear catheter section 20 of the catheter 1 can be integrally formed or can be separately formed. The supporting column 11 and the extending wing 12 of the front catheter section 10 can be integrally formed or separately formed.

In addition, the material of the support column 11 and the extension wings 12 of the catheter 1 may be the same or different. The support post 11 may be made of a relatively soft material, such as rubber or silicone, and the extension wings 12 may be made of a relatively hard material to separate as large a blood clot as possible without causing damage to the human tissue.

Referring to fig. 10, the catheter 1 according to another preferred embodiment of the invention is shown schematically.

This embodiment differs from the embodiment shown in fig. 2 mainly in the front section 10 of the catheter. In this embodiment, the catheter has a plurality of through holes 600, wherein the through holes 600 are formed in the extension wings 12 of the front section 10 of the catheter. Two adjacent drainage grooves 100 can be communicated by the through hole 600. When the urinary catheter 1 is inserted into a human body, the outer peripheral edge of the extending wing 12 is mainly in contact with the human body tissue, and since the through hole 600 is formed in the extending wing 12 and is kept at a certain distance from the outer peripheral edge of the extending wing 12, the human body tissue is not injured by the existence of the through hole 600, however, blood clots may flow to the through hole 600 during the process of blocking the drainage groove 100, and the portion of the extending wing 12 forming the through hole 600 is designed to be sharp, so that the blood clots are cut.

In other words, in this embodiment, the blood clot can be divided not only by the outer peripheral edge of the extension wing 12, but also by the through hole 600 formed by the extension wing 12, and the divided blood clot can flow through the drainage grooves 100 on both sides of the extension wing 12, and the blood clot can be divided by the through hole 600 without affecting the peripheral human tissue when the catheter 1 is inserted into or removed from the body.

Referring to fig. 11, the catheter 1 according to another preferred embodiment of the invention is shown schematically.

This embodiment differs from the embodiment shown in FIG. 2 primarily in the placement of the drainage slots 100.

In detail, the urinary catheter 1 comprises the front catheter section 10 and the rear catheter section 20 and has at least one drainage groove 100, one drainage channel 300 and at least one drainage inlet 110. In the above embodiment, the drainage grooves 100 are arranged in a straight line. In this embodiment, the drainage grooves 100 are arranged in a spiral shape, which is spirally formed along the support column 11. In other words, the respective open positions of the same drainage channel 100 are not in the same direction. In this manner, the likelihood of a clot blocking the drainage channel 100 is reduced.

In addition, the irrigation ports 502 can be arranged at the front section 10 of the catheter and spirally spaced along the support column 11 for effective irrigation of the drainage groove 100.

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 present 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. A guidable surgical catheter suitable for being inserted into a urinary bladder, comprising a front catheter section, a rear catheter section, a bending portion and a guide channel, a guide outlet, at least two drainage grooves and at least two guide inlets, wherein the front catheter section has a connecting end and an opposite end, the connecting end of the front catheter section extends to the rear catheter section, the rear catheter section has an extending end and an opposite starting end, the extending end is connected to the connecting end of the front catheter section, the guide outlet is located at the starting end, the guide inlet is arranged at the extending end, the guide channel is formed at the rear catheter section and is respectively communicated with the guide inlet and the guide outlet, the drainage groove is formed by at least partially recessing an outer surface of the front catheter section so as to be suitable for being directly exposed in the bladder, wherein the drainage groove is formed by extending from the position of the flow guide inlet towards the tail end of the front catheter section so as to guide the fluid on the peripheral side of the catheter to be guided to the flow guide inlet along the drainage groove and then to be guided to the flow guide outlet along the flow guide channel towards the rear catheter section, and the catheter is arranged to have a length extending from at least one flow guide inlet to the tail end of the front catheter section greater than the length extending from other at least one flow guide inlet to the tail end of the front catheter section, wherein at least part of the front catheter section close to the tail end is provided with a bent structure so as to form the bent part and the front catheter section has a bent inner side and a bent outer side, the length of the drainage groove located outside the bend is arranged to be longer than the drainage groove located inside the bend.

2. A surgical guidable catheter as set forth in claim 1, wherein said drainage slots are plural in number and are spaced apart, at least a portion of at least one of said drainage slots being located at said bend to provide a curved flow guide area.

3. The surgical guidable catheter as set forth in claim 1, wherein said drainage grooves are positioned a predetermined distance from said end of said front catheter section to allow said end of said front catheter section to be positioned closed.

4. The surgical guidable catheter according to claim 1, wherein said drainage grooves of said catheter are arranged such that said drainage inlet locations extend linearly along the extension direction of said catheter towards said end of said catheter.

5. A surgical guidable catheter as claimed in claim 1, wherein said drainage channels of said catheter are arranged to extend from said drainage inlet location helically along the direction of extension of said catheter towards said end of said catheter.

6. A surgical guidable catheter as claimed in any one of claims 1 to 5, wherein each of said flow guide inlets corresponds to one of said drainage grooves and said flow guide inlet is located in the direction of extension of said drainage groove.

7. A surgical guidable catheter as claimed in any one of claims 1 to 5, wherein said catheter front section comprises a support column and at least two extension wings extending outwardly from the peripheral side of said support column and one said drainage groove is formed between adjacent two of said extension wings.

8. The surgical guidable catheter as set forth in any one of claims 1 to 5, wherein said catheter has an initial end, an opposite end and a guide channel extending between said initial end and said end, wherein said guide channel allows insertion of a guide for guiding entry of said catheter.

9. A surgical guidable catheter according to any one of claims 1 to 5, wherein said catheter further comprises a balloon and a balloon having a gas channel, said balloon being arranged at said rear catheter section, said flow guide inlet being arranged close to said end of said front catheter section with respect to said balloon, wherein said balloon is arranged in communication with said gas channel to allow inflation of said balloon by means of said gas channel.

10. The surgical guidable catheter as set forth in claim 1, wherein said plurality of drainage channels are spaced apart and at least a portion of at least one of said drainage channels is disposed at said bend to provide a curved flow guiding region, wherein said drainage channels are disposed a predetermined distance from said end of said catheter front section to allow said end of said catheter front section to be disposed closed, said end of said catheter front section is disposed in a bullet-head shape, wherein said drainage channels of said catheter are disposed such that said flow guiding inlet position extends linearly along a direction of extension of said catheter toward said end of said catheter, wherein said catheter rear section has an extension end connected to said connection end of said catheter front section and an opposite start end, said flow guiding outlets are located at said start end, said flow guiding inlets are plural in number and disposed at said extension end, each of said flow guiding inlets corresponds to one of said drainage channels and said flow guiding inlet is located in a direction of extension of said drainage channels, wherein said balloon is disposed in communication with said catheter front section to allow said gas guiding passage to be inflated by said balloon to guide said catheter end into said catheter front section, wherein said balloon is disposed to allow said balloon to guide said balloon to be in communication with said catheter front section and said balloon to allow said balloon to be disposed in communication with said catheter balloon to guide said catheter end, wherein the length of the drainage groove on the back side of the bending portion is set to be longer than the length of the drainage groove at other positions, wherein the catheter front section includes a support column and at least two extension wings, the extension wings extend outward from the peripheral side of the support column and one drainage groove is formed between two adjacent extension wings, at least one of the flow guide inlets is provided to the support column of the catheter front section to communicate the drainage groove with the flow guide channel, wherein the catheter has a plurality of grooves and the grooves are provided to the extension wings to communicate the two adjacent drainage grooves, wherein the extension wings include an extension side wall extending outward from the support column and an extension peripheral wall extending between the support column and the extension peripheral wall, the extension wing is set to be T-shaped in cross section, wherein opposite sides of the extension peripheral wall of the extension wing are set to extend inward to reduce irritation to the human body when the catheter is in contact with the human body and to allow the opposite sides of the extension peripheral wall to be separated into small blood clots.