CN113082473B

CN113082473B - External drainage catheter for operation

Info

Publication number: CN113082473B
Application number: CN202110502089.1A
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: 2022-07-29
Anticipated expiration: 2041-05-08
Also published as: CN113082473A

Abstract

The invention provides an external drainage catheter for operation, which comprises a drainage end, a fixed air bag and a catheter main body, the drainage end, the fixing air bag and the catheter body are flexibly connected in a linear manner, the drainage end is provided with at least two drainage grooves, each drainage groove is opened backwards from the drainage end and extends for a preset distance, the fixed air bag is provided with an inner wall and an outer wall, and an inner channel and a cavity, wherein the annular cavity is formed between the inner wall and the outer wall, the inner wall forms the inner channel, the drainage groove is communicated with the inner channel, the catheter body is provided with a main channel, the drainage groove of the drainage end, the inner channel of the fixed air bag and the inner channel of the catheter body are sequentially communicated to form a drainage channel, the catheter body is provided with an inflation channel, and the inflation channel is communicated with the cavity.

Description

External drainage catheter for operation

Technical Field

The invention relates to the field of medical supplies, in particular to an external drainage catheter applied after an operation.

Background

A urinary catheter is a medical item used for insertion into the bladder via the urethra to draw urine. The urinary catheters are divided into two types, namely a common urinary catheter, namely, a urinary medical article which is temporarily used when a user has difficulty in urination, for example, a parturient can assist in urination by inserting the common urinary catheter when the parturient has difficulty in urination in the early production period; the other is an indwelling catheter, which is primarily intended for carrying a permanent drainage for a prolonged period of time, e.g. within 7 days.

In the case of a common catheter or an indwelling catheter, since staged changes caused by various operations, such as a small amount of bleeding, a certain reduction in the circulatory function of the body, and the like, inevitably occur in the body of a patient during or after some operations, various needs are different from those of the normal state, but both of them are more suitable for general catheterization, that is, the catheter after the operation has various higher requirements, but both of them are suitable for the common urine condition.

In this context, the inventors have found that there are several aspects to be improved on existing surgical catheters.

As mentioned above, since bleeding or clotting may occur in a patient's body after operation, the catheter is often clogged during use. If the catheter is blocked, the patient cannot timely perceive the situation, and at the moment, if medical staff cannot find the situation, the patient cannot timely discharge urine, the catheter cannot be replaced for a long time or other dredging measures are adopted, so that very serious adverse effects or even life threats are brought to the body of the patient. Thus, the problem of clogging of existing catheters is an urgent problem to be solved.

The statements herein merely provide background information related to the present disclosure and may not necessarily constitute prior art.

Disclosure of Invention

An object of the present invention is to provide an external drainage catheter for operation, which improves the blockage problem of the small hole of the traditional catheter by means of end external drainage.

It is another object of the present invention to provide an external surgical drainage catheter that reduces clogging of bulk debris, such as blood clots, by providing for both surface drainage at the drainage end of the catheter and open drainage channels.

It is another object of the present invention to provide a surgical external drainage catheter, wherein the surgical catheter is formed with a plurality of drainage grooves, and the end surfaces are formed with radial split structures, thereby better shunting and splitting a partially viscous or blocky object.

Another object of the present invention is to provide an external surgical drainage catheter, wherein the drainage grooves of the external surgical drainage catheter extend linearly backward from the outer end and communicate with the catheter body through the communication holes after extending a predetermined length, thereby providing a primary filtration function for entering the elongated delivery surface of the catheter body.

Another object of the present invention is to provide an external surgical drainage catheter, wherein the external surgical drainage catheter comprises a plurality of drainage surfaces, which are connected in a radial manner, so that liquid can enter the drainage groove from different heights and different directions, and then enter the catheter body to be transported.

It is another object of the present invention to provide a surgical external drainage catheter, wherein in one embodiment the surgical external drainage catheter forms a channel capable of passing through a guide wire to facilitate delivery of the catheter into a human bladder by means of guidance through the guide wire.

To achieve at least one of the above objects, one aspect of the present invention provides a surgical external drainage catheter, comprising:

a drainage end, a fixed gasbag and a catheter main part, the drainage end fixed gasbag with the catheter main part is the line type connection flexibly, the drainage end has two at least drainage grooves, each the drainage groove certainly the drainage end is open backward and extends the predetermined distance, fixed gasbag has an inner wall and an outer wall and has an interior passageway and a cavity, the inner wall with form annular between the outer wall the cavity, the inner wall forms the interior passageway, the drainage groove intercommunication the interior passageway, the catheter main part has a main channel, the drainage end the drainage groove fixed gasbag the interior passageway of catheter main part communicates in proper order and forms a drainage channel, the catheter main part has an inflation channel, inflation channel intercommunication the cavity.

According to one embodiment, the surgical external drainage catheter is provided with a communication hole, and the communication hole is communicated with the drainage groove and the inner channel of the fixing air bag.

The surgical external drainage catheter according to one embodiment, wherein the drainage groove at least partially extends along the drainage end to form an opening communicated with the outside.

The external drainage catheter for operation according to an embodiment, wherein the drainage end is provided with at least two drainage surfaces, and the two drainage surfaces form the drainage groove.

The surgical external drainage catheter according to one embodiment, wherein the drainage end has at least two drainage surfaces and at least one internal connection surface, and the internal connection surface is connected between the two drainage surfaces to form the drainage groove.

According to one embodiment, the external drainage catheter for operation is provided, wherein the drainage end is provided with a central channel, the central channel is communicated with the inner channel of the fixing balloon and the main channel of the catheter body to form a guide channel so as to pass through a guide element.

The surgical external drainage catheter according to one embodiment, wherein the catheter body comprises a flushing interface, and the flushing interface is communicated with the main channel.

The external drainage catheter for operation according to an embodiment, wherein a plurality of the drainage surfaces are radially connected to form a plurality of the drainage grooves.

According to one embodiment, the surgical external drainage catheter comprises a drainage end, wherein the drainage end comprises a covering area which is arranged at a local position of the opening of the drainage groove in a covering mode.

The surgical external drainage catheter according to one embodiment, wherein the drainage end comprises an extrados surface which is positioned outside the drainage surface.

Drawings

Fig. 1 is a perspective view of a surgical urinary catheter according to a first embodiment of the present invention in an uninflated state.

Fig. 2 is a drainage end of a surgical catheter according to a first embodiment of the present invention.

Fig. 3 is a schematic view of an anchoring balloon of a surgical catheter according to a first embodiment of the present invention.

Fig. 4 is a schematic cross-sectional view of a surgical urinary catheter according to a first embodiment of the present invention.

Fig. 5 is a perspective view schematically illustrating an inflated state of the surgical urinary catheter according to the first embodiment of the present invention.

Fig. 6 is a schematic top view of an outer end surface of a surgical urinary catheter according to a first embodiment of the present invention.

Fig. 7A is a schematic use view of a user of a surgical urinary catheter according to a first embodiment of the present invention in a standing state.

Fig. 7B is a partially enlarged schematic view of a position a in fig. 7A.

Fig. 8A is a schematic use view of a user of a surgical urinary catheter according to a first embodiment of the present invention in a lying state.

Fig. 8B is a partially enlarged schematic view of a B position in fig. 8A.

Fig. 9 is a perspective view of a surgical catheter according to a second embodiment of the present invention.

Fig. 10 is a schematic cross-sectional view of a surgical urinary catheter according to a third embodiment of the present invention.

Fig. 11 is a perspective view of a surgical urinary catheter according to a fourth embodiment of the present invention.

Fig. 12A and 12B are perspective schematic views of a surgical urinary catheter according to a fifth embodiment of the present invention.

Fig. 13A and 13B are perspective views of a surgical urinary catheter according to a sixth embodiment of the present invention.

Fig. 14A and 14B are schematic views of an external surgical drainage catheter according to a seventh embodiment of the present invention.

Fig. 15A and 15B are modified embodiments of the extrados according to the second embodiment of the present invention.

Fig. 15C is a modified embodiment of the surgical urinary catheter according to the second embodiment of the present invention.

Fig. 16 is an anti-clogging surgical catheter according to an eighth embodiment of the present 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 of a surgical urinary catheter according to a first embodiment of the present invention in an uninflated state. Fig. 2 is a drainage end of a surgical catheter according to a first embodiment of the present invention. Fig. 3 is a schematic view of an anchoring balloon of a surgical catheter according to a first embodiment of the present invention. Fig. 4 is a schematic cross-sectional view of a surgical urinary catheter according to a first embodiment of the present invention. Fig. 5 is a perspective view schematically illustrating an inflated state of the surgical urinary catheter according to the first embodiment of the present invention. Fig. 6 is a schematic top view of an outer end surface of a surgical urinary catheter according to a first embodiment of the present invention. Fig. 7A is a schematic use view of a user of a surgical urinary catheter according to a first embodiment of the present invention in a standing state. Fig. 7B is a partially enlarged schematic view of a position a in fig. 7A. Fig. 8A is a schematic use view of a user of a surgical urinary catheter according to a first embodiment of the present invention in a lying state. Fig. 8B is a partially enlarged schematic view of a B position in fig. 8A.

Referring to fig. 1 to 8B, the present invention provides an external drainage catheter for operation 1, which external drainage catheter for operation 1 is used for draining urine by inserting into bladder through urethra of human body. The external drainage catheter 1 for operation is suitable for use in or after operation, such as but not limited to prostate hyperplasia operation, ureteroscopy operation, and bladder cancer operation.

The external drainage catheter 1 for operation comprises a drainage end 11, a fixed air bag 12 and a catheter body 13, wherein the drainage end 11, the fixed air bag 12 and the catheter body 13 are flexibly and approximately in a linear connection to adapt to the natural channel of a human body.

For convenience of explanation, the direction of entering the human body is defined as front, and the direction of being outside the human body is defined as back. The drainage end 11 is positioned in front of the fixing balloon 12, and the fixing balloon 12 is positioned in front of the catheter body 13.

In one embodiment of the invention, the drainage end 11, the fixing balloon 12 and the catheter body 13 are integrally connected. By way of example and not limitation, the drainage end 11, the fixation balloon 12 and the catheter body 13 are formed by one or more times by integrally forming the drainage end 11, the fixation balloon 12 and the catheter body 13.

The drainage end 11 has at least two drainage slots 1101, each of the drainage slots 1101 opening a predetermined distance rearwardly from the drainage end 11. The drainage slots 1101 have an opening 1102, and the drainage slots 1101 communicate with the external space in the lateral direction through the opening 1102. The drainage slots 1101 communicate with the fixation balloon 12 to facilitate delivery of liquid to the fixation balloon 12 segment through the drainage slots 1101. That is, in use, urine within the bladder is delivered through the drainage slots 1101 to the end of the fixation balloon 12, and thence outwardly.

Referring to fig. 1 and 2, the drainage end 11 has at least two drainage surfaces 111, and at least two drainage surfaces 111 form the drainage groove 1101. In one embodiment of the present invention, the drainage grooves 1101 are formed by connecting the two drainage surfaces 111 at a predetermined angle, such as a groove with a triangular cross section.

Referring to fig. 2, in one embodiment of the present invention, the drainage end 11 further has an inner connecting surface 112, and the inner connecting surface 112 is connected between the two drainage surfaces 111 to form the drainage groove 1101. That is, a trapezoidal section having a trapezoidal section or one-side arc shape is formed.

Further, the drainage end 11 includes at least two drainage fins 113, and the surface of the drainage fin 113 forms the drainage surface 111. In one embodiment of the present invention, at least two of the drainage slots 1101 are formed by connecting the lateral ends of at least two of the drainage fins 113. That is, at least two of the drainage fins 113 divide one cylinder space into at least two spaced spaces.

In other words, both side surfaces of the drainage fin 113 correspond to the drainage grooves 1101.

In this embodiment of the invention, the drainage end 11 includes three drainage tabs 113, and has three drainage slots 1101, the three drainage slots 1101 being formed by three drainage tabs 113 at intervals.

Further, the three drainage fins 113 are connected at the radial ends, that is, the three drainage fins 113 are spaced apart from each other to form three drainage grooves 1101 having a generally triangular cross section.

It should be noted that in this embodiment of the present invention, the drainage end 11 includes three drainage fins 113 and three drainage slots 1101, and in other embodiments of the present invention, the drainage end 11 may include other numbers of drainage fins 113 and other numbers of drainage slots 1101. By way of example, but not limitation, 2, 4, 5, and above, the invention is not limited in this regard.

At least one communicating hole 1103 is formed at the tail end of the drainage groove 1101, and the drainage groove 1101 is communicated with the fixing air bag 12 through the communicating hole 1103.

Referring to fig. 1 and 2, since in the embodiment of the present invention, three drainage fins 113 are radially connected to form a plurality of drainage slots 1101, on one hand, liquid can be drained from different directions and heights into the drainage slots 1101 through the open drainage slots 1101, rather than being limited to the conventional small hole; on the other hand, the drainage surface 111 drains the liquid, i.e. the liquid can flow along the drainage surface 111, so that for some sticky particles, it can stay on a partial surface of the drainage surface 111, rather than being directly delivered to the communication holes 1103 at the end of the drainage groove 1101.

Referring to fig. 1, 3 and 5, the fixation balloon 12 has an uninflated state 100 and an inflated state 200, in the inflated state 200 the volume of the fixation balloon 12 is increased, in the uninflated state 100 the fixation balloon 12 is in a deflated state, or in other words the surface of the fixation balloon 12 and the surface of the catheter body 13 are substantially congruent.

The fixing balloon 12 has an inner channel 1201, and both ends of the inner channel 1201 are respectively communicated with the drainage end 11 and the catheter body 13. That is, the inner channel 1201 of the fixing balloon 12 is a communication channel between the drainage end 11 and the catheter body 13.

The drainage grooves 1101 communicate with the inner passage 1201 of the fixing balloon 12 through the communication holes 1103 for delivering liquid.

The fixation balloon 12 has a cavity 1202, and the cavity 1202 is filled with a gas or liquid to form the inflated fixation balloon 12, i.e., to increase the volume of the fixation balloon 12.

The fixation balloon 12 includes an inner wall 121 and an outer wall 122, the inner wall 121 defining the inner channel 1201. The outer wall 122 and the inner wall 121 are connected at their edges to form the cavity 1202. The outer wall 122 has greater elasticity than the inner wall 121. That is, when the chamber 1202 is inflated, the outer wall 122 expands outwardly and the inner wall 121 remains substantially intact.

Referring to fig. 4, the catheter body 13 has a gas channel 1302, and the gas channel 1302 communicates with the cavity 1202 of the fixing balloon 12 so as to inflate the cavity 1202 through the gas channel 1302. In other words, the gas channel 1302 for inflating the fixing balloon 12 is provided to the catheter body 13. Further, the main passage 1301 and the gas passage 1302 are independently provided to extend in parallel. In other embodiments of the present invention, the gas channel 1302 can be provided separately, for example but not limited to, by a separate tube communicating with the cavity 1202 of the fixing balloon 12, instead of being integrally provided with the catheter body 13.

The catheter body 13 has a main channel 1301, and the main channel 1301 communicates with the inner channel 1201 of the fixing balloon 12. Further, the drainage groove 1101 of the drainage end 11, the inner channel 1201 of the fixing balloon 12 and the main channel 1301 of the catheter body 13 are communicated with each other to form an integral drainage channel 101. The cavity 1202 of the fixing balloon 12 and the gas channel 1302 of the catheter body 13 are communicated with each other to form an inflation channel 102.

Further, the surgical external drainage catheter 1 comprises an inflation interface 14, the inflation interface 14 is communicated with the gas channel 1302 of the catheter body 13, and the inflation interface 14 is arranged at a position close to the rear of the catheter body 13. Further, the inflation port 14 communicates with each of the inflation channels 102, so that an external inflation component is connected through the inflation port 14 to inflate the fixed airbag 12 through the inflation channel 102.

The external drainage catheter 1 for operation further comprises a delivery interface 15, wherein the delivery interface 15 is communicated with the main channel 1301 of the catheter body 13, so that an external bearing component, such as a drainage tube, a urine bag and the like, can be conveniently connected through the delivery interface 15. The delivery port 15 is provided at a position near the rear of the catheter body 13. Further, the delivery port 15 communicates with the drainage channel 101, so that the drainage channel 101 formed by the drainage groove 1101, the inner channel 1201 of the fixing balloon 12, the main channel 1301 of the catheter body 13 and the delivery port 15 gradually deliver the liquid inside to the outside.

The surgical external drainage catheter 1 further comprises an air valve 16, and the air valve 16 is used for being detachably connected with the inflation interface 14 in a sealing way. That is, when the fixation balloon 12 is inflated, the gas valve 16 is sealed to the inflation port 14 such that the fixation balloon 12 remains in the inflated, inflated state 200. When the surgical external drainage catheter 1 needs to be restored to the uninflated state 100, the air valve 16 can be deflated, so that the intracavity air flows out through the inflation channel 102, and the volume of the fixed air bag 12 is reduced.

When the surgical external drainage catheter 11 is used, after the fixing balloon 12 enters a predetermined position of the human bladder, the fixing balloon 12 is inflated by an inflating device through the inflation channel 102 to expand the fixing balloon 12 to be fixed inside the human body, and hemostasis is pressed by the expanded balloon, and further, the air valve 16 is inserted into the inflation interface 14 to close the inflation channel 102, so that the fixing balloon 12 is continuously in the inflated state 200. When the anti-blocking catheter for operation needs to be taken out, the air valve 16 is taken out firstly, so that the fixed air bag 12 is recovered to the uninflated state 100, namely, the volume is reduced, and the external drainage catheter 1 for operation is further pulled out along the natural channel of the human body.

It should be noted that, by the structural design of the drainage groove 1101 of the surgical external drainage catheter 1 of the present invention, the surgical catheter can adapt to different postures of the human body, such as lying in bed, standing, and the like, in other words, drainage can be performed smoothly in different postures. Referring to fig. 8A-8B, for example, when the user is lying in bed, the extension direction of the catheter is substantially perpendicular to the gravity, and under the action of the gravity, the liquid can reach the drainage surface 111 from the lateral direction through the opening 1102, and then the liquid can be conveyed to the communication hole 1103 along the drainage surface 111. In other words, the corresponding drainage slot 1101 can be accessed from different directions, whether lying flat or on one side. With conventional inlet openings, due to the symmetrical distribution of the two inlet openings, only two directions are available for access, but if they are not directly opposite to the direction of flow of the liquid, they cannot be easily accessed, but if they are directly opposite, they are easily accessed from one opening and then from the other opening, or indeed one opening can be accessed. Referring to fig. 7A-7B, when the user is in a standing posture, the surgical external drainage catheter 1 extends in a direction substantially corresponding to the direction of gravity, and at this time, the liquid can enter directly along the outer end of the drainage end 11 or from the opening 1102 of the drainage groove 1101, and reach the communication hole 1103 by the gradual drainage action of the drainage surface 111, and be delivered to the outside through the delivery channel. Therefore, overall, based on the structural design of the drainage groove 1101 of the invention, the surgical external drainage catheter 1 can adapt to different use postures, and the risk of blockage is reduced.

Referring to fig. 9, according to the embodiment of the present invention, the drainage end 11 includes at least one outer arc surface 114, which is disposed at an outer end of the drainage sheet 113 to prevent an end of the drainage sheet 113 from directly contacting the outside, for example, a flat end of the drainage sheet 113 from directly contacting the inner trachea of a human body, thereby causing an adverse stimulation reaction.

Preferably, the outer arc surface 114 is arcuately disposed at an outer end of the guide vane 113. In other embodiments of the present invention, the outer arc surface 114 may have other shapes.

According to this embodiment of the present invention, a plurality of the extrados 114 are respectively provided at the outer ends of the plurality of the guide pieces 113, that is, the number of the extrados 114 matches the number of the guide pieces 113. A gap 1140 is formed between two adjacent extrados 114, and the gap 1140 connects the drainage groove 1101 with the outside.

A plurality of the outer arc surfaces 114 are arranged at intervals to form a substantially annular outer surface, that is, a relatively flat arc surface is formed integrally, instead of the stripe-shaped interval surface directly formed by the end surface of the current guiding plate 113. In other words, the stimulation of the drainage sheet 113 is moderated by the extrados 114. The extrados 114 cover the exterior of the drainage fin 113 in an arc shape, and a gap 1140 is formed between adjacent extrados 114, so that a protective guide wall which tends to the circumference is formed under the condition that liquid can pass through.

In an embodiment of the present invention, the extrados 114 extend to protrude from both sides of the drainage tab 113, i.e., to form a substantially T-shaped structure, and in another embodiment of the present invention, the extrados 114 extends to one side of the drainage tab 113 in a unidirectional manner, i.e., the extrados 114 and the drainage tab 113 form an L-shaped structure, which is not limited in this respect.

Referring to fig. 10, in this embodiment of the present invention, the surgical external drainage catheter 1 has a guide channel 103, and the guide channel 103 is used for passing through a guide member 2, thereby guiding the surgical external drainage catheter 1 into the natural channel of the human body. The guide element 2 is exemplified but not limited to a guide wire, an inner core.

The drainage end 11 of the surgical external drainage catheter 1 is provided with a central channel 1104, and the central channel 1104 is communicated with the inner channel 1201 of the fixing balloon 12. That is, the central passage 1104, the inner passage 1201 and the main passage 1301 communicate to form the guide passage 103.

Referring to fig. 11, in this embodiment of the present invention, the drainage end 11 has at least one covering region 115, and the covering region 115 is disposed in the area of the opening 1102 of at least one of the drainage slots 1101. In one embodiment of the present invention, the cover regions 115 are alternately disposed at intervals in the drainage slots 1101. The covering region 115 extends from the bladder to a predetermined height above the drainage slot 1101. That is, the part of the drainage is directly communicated with the outside, and the part is covered.

In one embodiment of the present invention, the drainage end 11 has four drainage slots 1101, which are a first drainage slot 11011, a second drainage slot 11012, a third drainage slot 11013 and a fourth drainage slot 11014, and the four drainage slots 1101 are sequentially and annularly arranged. The drainage end 11 includes two cover regions 115, a first cover region 1151 and a second cover region 1152. The first cover region 1151 is disposed in the first conduction groove 11011 and the second cover region 1152 is disposed in the third conduction groove 11013.

The first and

second cover regions

1151 and 1152 extend upwardly from the balloon segment at predetermined locations. The first cover area 1151 has a height identical to that of the second cover area 1152.

In another embodiment of the present invention, at least one of the covering regions 115 extends from one predetermined location to another predetermined location of the flow-directing slot 1101, i.e., an intermediate portion of the flow-directing slot 1101 is covered. That is, above the opening 1102 of the drainage groove 1101, both sides of the covering region 115 communicate with the outside, respectively.

Referring to fig. 12A and 12B, in this embodiment of the present invention, the drainage end 11 has a plurality of the drainage slots 1101 and a plurality of the covering regions 115, for example, but not limited to, 6, and the plurality of covering regions 115 are respectively covered on the partial opening regions of the plurality of drainage slots 1101. Further, the heights of the plurality of the capping regions 115 are gradually increased, that is, a step change is formed. In this embodiment of the present invention, a plurality of the cover regions 115 extend upward from the upper end of the fixing bag 12.

Referring to fig. 13A and 13B, in this embodiment of the present invention, the drainage end 11 has a plurality of the drainage slots 1101 and a plurality of the covering regions 115, and the plurality of the covering regions 115 are staggered to cover partial open regions of the plurality of the drainage slots 1101.

It is worth mentioning that in this embodiment of the present invention, the drainage tabs 113 of two adjacent drainage slots 1101 are partially connected by the covering region 115 and are arranged in a staggered manner, so that the space of the drainage slots 1101 can be partially fixed, and different height positions are combined with each other by the staggered manner, thereby providing better shape retention of the drainage slots 1101, i.e., reducing the blockage caused by the deformation of the flexible drainage tabs 113.

Referring to fig. 14A and 14B, in another embodiment of the present invention, at least one of the covering regions 115 is provided with at least one of the drainage slots 1101, and the covering region 115 extends inwardly from the outer end of the drainage end 11, i.e., a partial opening 1102 of the drainage slot 1101 near the outer end is closed.

In this embodiment of the present invention, the drainage end 11 has a plurality of the drainage slots 1101 and a plurality of the covering regions 115, for example, but not limited to, 6, and the plurality of the covering regions 115 are respectively covered with the partial opening regions disposed in the plurality of the drainage slots 1101. Further, the heights of the plurality of the capping regions 115 are gradually increased, that is, a step change is formed. In this embodiment of the invention, a plurality of the cover regions 115 extend inwardly from the outer end of the drainage end 11.

In another embodiment of the present invention, the drainage end 11 has three drainage slots 1101, which are respectively a first drainage slot, a second drainage slot and a third drainage slot, and the three drainage slots 1101 are sequentially and annularly arranged. The drainage end 11 comprises three covering areas 115, namely a covering area, a second covering area and a third covering area, wherein the first covering area is arranged in the first drainage groove, the second covering area is arranged in the second drainage groove, and the third covering area is arranged in the third drainage groove. The first covering area extends backwards for a preset distance from the outer end of the first drainage groove. The second covering area extends backwards for a preset distance from the outer end of the second drainage groove. The third covering area extends backwards from the third drainage groove by a preset distance. The first covering area, the second covering area and the third covering area are consistent in extension length.

Referring to fig. 15A and 15B, a variant of the extrados 114 is shown in an embodiment according to the invention. Referring to fig. 15A, in this embodiment of the present invention, the extrados 114 extends from both sides of the drainage tab 113, and one side extends for a length greater than the other side.

Referring to fig. 15B, in this embodiment of the present invention, the extrados 114 extends from one side of the guide piece 113, that is, the cross-section of the guide piece 113 and the extrados 114 is substantially L-shaped.

Referring to fig. 15C, a modified embodiment of the drainage groove 1101 is shown in accordance with a second embodiment of the present invention. In this embodiment of the invention, the drainage end 11 has 6 drainage slots 1101, and the 6 drainage slots 1101 are symmetrically arranged.

Referring to fig. 16, in this embodiment of the present invention, the surgical external drainage catheter 1 further has a flushing channel, and specifically, the surgical external drainage catheter 1 includes a flushing interface 17, the flushing interface 17 is disposed on the catheter body 13, and the flushing interface 17 communicates with the main channel 1301 to form the flushing channel.

When the external drainage catheter 1 for operation is used, firstly, the external drainage catheter 1 for operation is sent in through a natural channel of a human body, namely, the external drainage catheter 1 for operation is inserted into a urinary bladder through a urethra of the human body, furthermore, the fixing air bag 12 is inflated by the inflating device, so that the fixing air bag 12 is in the inflated state 200, the inflating interface 14 is sealed by the air valve 16, then the drainage urine comes out, when partial blockage occurs or the urine is found to be not flowing smoothly, or at regular time, an external flushing device is connected to the flushing interface 17, and then the flushing water is flushed to the inside through the flushing channel, so that the partial blockage is flushed away, or the drainage channel 101 is cleaned, and the danger of blockage is prevented. After the surgical external drainage catheter 1 is used, the air valve 16 is pulled out, so that the fixing air bag 12 is recovered to the uninflated state 100, and then the surgical external drainage catheter 1 is pulled out from the body.

The test comparison of the using effect of the common catheter and the external drainage catheter for the operation of the invention is as follows:

the external drainage catheter for the operation with the size and the model of 18F is manufactured in a 3D printing mode, and is compared with a common silica gel catheter with the same model of 18F in a drainage test.

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

Two bottles of 350ml of liquid water are respectively drained by using an 18F common silica gel catheter and an 18F surgical external drainage catheter. The drainage completion time of the 18F common silica gel urinary catheter is 36 seconds. The drainage completion time of the surgical external drainage catheter of the present invention was 38 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 18F silicone drain was blocked by the clot within 5 seconds with little liquid draining.

The 18F surgical external drainage catheter drained 50ml of fluid in 31 seconds.

Through a comparative test, the external drainage catheter for operation disclosed by the invention has a drainage effect equivalent to that of a common catheter 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 urinary catheter is easy to be blocked, and the external drainage urinary catheter for operation of the invention has better drainage effect and can prevent the blockage to a certain extent. It is worth mentioning that the drainage end of the surgical external drainage catheter based on the invention has a plurality of the drainage grooves 1101, and the drainage sheets forming the drainage grooves 1101 radially extend outwards, that is, drainage positions are formed on the whole peripheral side and at different heights of the drainage end, and the drainage sheets have a certain supporting function, and when blood clots reach the end faces of the drainage sheets, the blood clots are blocked by the drainage surfaces, so that even if the blood clots occur, all drainage areas of all the drainage grooves cannot be blocked, that is, the phenomenon of complete blockage cannot occur.

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. An external drainage catheter for surgery, comprising:

a drainage end, a fixing air bag and a catheter main body, wherein the drainage end, the fixing air bag and the catheter main body are flexibly connected in a linear manner, the drainage end is provided with at least two drainage grooves, each drainage groove extends from the drainage end to a preset distance in a backward opening manner, the fixing air bag is provided with an inner wall and an outer wall and is provided with an inner channel and a cavity, the annular cavity is formed between the inner wall and the outer wall, the inner wall forms the inner channel, the drainage grooves are communicated with the inner channel, the catheter main body is provided with a main channel, the drainage grooves of the drainage end, the inner channel of the fixing air bag and the main channel of the catheter main body are sequentially communicated to form a drainage channel, the catheter main body is provided with a gas channel, the gas channel is communicated with the cavity, and the drainage grooves at least partially extend along the drainage end to form an opening communicated with the outside, the drainage end comprises a plurality of covering areas and a plurality of drainage pieces, and the two adjacent drainage pieces form the drainage groove and form the same drainage groove.

2. The surgical external drainage catheter according to claim 1, wherein the drainage end has a communication hole communicating the drainage groove and the inner channel of the fixing balloon.

3. The surgical external drainage catheter according to claim 1, wherein the drainage end has at least two drainage surfaces, the two drainage surfaces forming the drainage groove.

4. The surgical external drainage catheter according to claim 1, wherein the drainage end has at least two drainage surfaces and at least one internal connection surface, the internal connection surface being connected between the two drainage surfaces to form the drainage groove.

5. The surgical external drainage catheter according to claim 1, wherein the drainage end has a central channel, the central channel forms a guide channel communicating with the inner channel of the fixing balloon and the main channel of the catheter body so as to pass through a guide element.

6. The surgical external drainage catheter according to claim 1, wherein the catheter body comprises a flushing port, and the flushing port is communicated with the main channel.

7. The surgical external drainage catheter according to claim 3 or 4, wherein a plurality of the drainage surfaces are radially connected to form a plurality of the drainage grooves.

8. The surgical external drainage catheter according to any one of claims 1 to 6, wherein each of said covering regions is covered with an opening region of said drainage groove and is arranged at different heights to allow liquid to enter from said drainage groove into the interior of said catheter from different height positions.

9. The surgical external drainage catheter according to claim 7, wherein each of the covering regions is covered with an opening region of the drainage groove and arranged at different heights to allow liquid from the drainage groove to enter the interior of the catheter from different height positions.

10. The surgical external drainage catheter according to claim 1, wherein the drainage end comprises a plurality of drainage pieces, each of the drainage pieces forms a drainage surface, two adjacent drainage pieces form the drainage groove, a plurality of the drainage grooves are formed by connecting radial end portions of the drainage pieces so as to allow liquid to enter the drainage grooves from different directions and heights, the drainage end comprises a plurality of outer arc surfaces, the outer arc surfaces are positioned at the outer sides of the drainage surfaces, the plurality of the outer arc surfaces are arranged at intervals to form a substantially annular outer surface, the gas channel is integrally arranged in parallel with the main channel and comprises a gas filling port, the gas filling port is communicated with the gas channel, the gas filling port is arranged at a position close to the rear of the catheter body and comprises a delivery port, and the delivery port is communicated with the main channel of the catheter body, so as to connect the outer receiving component through the delivery interface, which comprises an air valve, the air valve is arranged on the inflation interface, the drainage end is provided with a central channel, the central channel is communicated with the inner channel of the fixed air bag and the main channel to form a guide channel, the guide channel is suitable for passing through a guide element, a plurality of the covering areas are alternately arranged in a plurality of the drainage grooves at intervals, the drainage grooves comprise a flushing interface, the flushing interface is arranged at the position, close to the rear, of the catheter body, and the flushing interface is communicated with the main channel to form a flushing channel so as to flush water towards the inner part.