CN115414578A

CN115414578A - Anal canal drainage tube

Info

Publication number: CN115414578A
Application number: CN202211076932.5A
Authority: CN
Inventors: 张续乾; 宫一凡
Original assignee: China Aerospace Science And Engineering Group 731 Hospital
Current assignee: China Aerospace Science And Engineering Group 731 Hospital
Priority date: 2022-09-05
Filing date: 2022-09-05
Publication date: 2022-12-02
Anticipated expiration: 2042-09-05
Also published as: CN115414578B

Abstract

The invention discloses an anal tube drainage tube which comprises a drainage tube body, an inflatable air bag, a flushing tube and radial dilators, wherein the flushing tube is fixed outside the drainage tube body and used for flushing and drainage, a first flushing hole is formed in the side wall of the flushing tube, a second flushing hole is formed in the drainage tube body, the first flushing hole is communicated with the second flushing hole, the inflatable air bag is sleeved outside the flushing tube and the head end of the drainage tube body, the radial dilators are arranged along the axial direction of the drainage tube body and used for dilating the diameter of the drainage tube body, and the radial dilators are arranged in a radial direction of the drainage tube body in a crossed manner. The anal tube drainage tube has a supporting effect by arranging the inflatable air bag at the head end, so that the problem of unsmooth drainage caused by the fact that the head end of the anal tube drainage tube props against the intestinal wall is avoided; the inside radial expander that sets up of drainage tube body can expand the diameter of drainage tube body, reduces the jam in the lumen, and the drainage is unobstructed, avoids leading to the intestinal injury that pressure increase caused because of the jam.

Description

Anal canal drainage tube

Technical Field

The invention relates to the technical field of medical instruments, in particular to an anal tube drainage tube.

Background

The anal tube drainage tube is used for clinical drainage, and a slightly thick drainage tube is plugged into the anus and is communicated with the outside. Is mainly used for draining feces in intestinal tract or reducing pressure. The drainage tubes and clinical use conditions on the market at present have the following problems: 1. the drainage is not smooth or even impossible due to the blockage of the tube cavity in the process of draining the excrement; 2. the head end of the drainage tube can prop against the intestinal wall to cause unsmooth drainage; 3. the drainage tube can not be used for enema treatment after being plugged into the anus, and the enema liquid can not be drained out to increase the pressure in the intestinal tract to the intestinal tract injury due to the narrow tube cavity after the enema is filled into the anal tube.

Disclosure of Invention

Aiming at the defects of the prior art, the invention innovatively provides the anal tube drainage tube, the inflatable air bag is arranged at the head end of the anal tube drainage tube to play a role in supporting, and the problem of unsmooth drainage caused by the fact that the head end of the anal tube drainage tube props against the intestinal wall is avoided; the drainage tube body is internally provided with the radial expander which can expand the diameter of the drainage tube body, so that the blockage in the tube cavity is reduced, the drainage is smooth, and the intestinal injury caused by the increase of pressure due to the blockage is avoided.

In order to realize the technical purpose, the invention discloses an anal tube drainage tube, which comprises a drainage tube body, an inflatable air bag, a flushing tube and a radial expander,

the flushing pipe is fixed outside the drainage pipe body and used for flushing and drainage, a first flushing hole is formed in the side wall of the flushing pipe, a second flushing hole is formed in the drainage pipe body, the first flushing hole is communicated with the second flushing hole,

the inflatable air bag is sleeved outside the head ends of the flushing pipe and the drainage pipe body,

the radial expanders are arranged along the axial direction of the drainage tube body, the radial expanders are used for expanding the diameter of the drainage tube body, and the radial expanders are arranged in a radial direction of the drainage tube body in a crossed mode.

Further, radial expander includes actuating mechanism, drive mechanism and a plurality of expansion bodies of arranging along drainage tube body axial, drive mechanism with the expansion body sets up inside the drainage tube body, the expansion body includes by a plurality of expansion posts that the cover was established in proper order in outer and, threaded connection between a plurality of expansion posts, outermost expansion post and drainage tube body inner wall fixed connection of expansion body, actuating mechanism's drive end stretch into drainage tube body inside with drive mechanism connects, actuating mechanism passes through drive mechanism and all the expansion post transmission that is in the inlayer of expansion body is connected, the actuating mechanism drive is except that all the other expansion posts of outermost expansion post are rotatory in proper order, the expansion body of a plurality of radial expanders is in the radial cross arrangement.

Further, drive mechanism include drive sprocket, drive chain and with the driven sprocket that expansion body quantity corresponds, driven sprocket with the expansion post one-to-one coaxial coupling of the inlayer of expansion body, drive sprocket with driven sprocket all with drive chain meshes, the drive chain transmission is linked drive sprocket and all driven sprocket, drive sprocket with actuating mechanism fixed connection, the actuating mechanism drive sprocket rotates.

Further, a spacing section is arranged between the external thread of the expansion column and two ends of the expansion column, and a spacing section is arranged between the internal thread of the expansion column and two ends of the expansion column.

Further, the driving mechanism is a rotating handle or a driving motor.

Further, still include pressure sensor, pressure sensor sets up in drainage tube body inside.

Further, the pressure display screen is further included, and the pressure display screen is electrically connected with the pressure sensor.

Further, the number of the radial expanders is 2, and the 2 radial expanders are vertically arranged in the radial direction of the drainage tube body.

The invention has the beneficial effects that:

the anal tube drainage tube has a supporting effect by arranging the inflatable air bag at the head end, so that the problem of unsmooth drainage caused by the fact that the head end of the anal tube drainage tube props against the intestinal wall is avoided; the inside radial expander that sets up of drainage tube body can expand the diameter of drainage tube body, reduces the jam in the lumen, and the drainage is unobstructed, avoids leading to the intestinal injury that pressure increase caused because of the jam.

Drawings

FIG. 1 is a schematic view of the structure of an anal canal drainage tube (not shown with a radial dilator) according to an embodiment of the present invention;

FIG. 2 is a schematic structural view of the interior of a drain body according to an embodiment of the present invention;

FIG. 3 is a schematic view of a radial dilator expanding a drain body according to an embodiment of the present invention;

FIG. 4 is a schematic view of a radial expander of an embodiment of the present invention in a contracted state;

fig. 5 is a schematic structural diagram of a transmission mechanism according to an embodiment of the present invention.

In the figure, the position of the first and second end faces,

1. a radial expander; 11. a drive mechanism; 12. a transmission mechanism; 121. a drive sprocket; 122. a drive chain; 123. a driven sprocket; 13. expanding the body; 131. expanding the column; 2. a drainage tube body; 21. a second flushing port; 3. an inflatable air bag; 4. a flush tube; 41. a first flushing port; 5. a pressure sensor; 6. and a pressure display screen.

Detailed Description

The anal canal drainage tube provided by the invention is explained and explained in detail below with reference to the attached drawings of the specification.

The embodiment specifically discloses an anal canal drainage tube, as shown in fig. 1, comprising a drainage tube body 2, an inflatable air bag 3, a flushing tube 4 and a radial expander 1, wherein the flushing tube 4 is fixed outside the drainage tube body 2 and used for flushing and drainage, a first flushing hole 41 is formed in the side wall of the flushing tube 4, a second flushing hole 21 is formed in the drainage tube body 2, and the first flushing hole 41 is communicated with the second flushing hole 21. The flushing pipe can be sleeved outside the drainage pipe body and is coaxially connected with the drainage pipe body, flushing liquid entering through the flushing pipe can enter the intestinal tract through the head end pipe orifice of the flushing pipe and the first flushing hole for flushing, and can also enter the drainage pipe body through the first flushing hole and the second flushing hole and then enter the intestinal tract through the head end pipe orifice of the drainage pipe body for flushing; the flushing pipe can also be connected with the drainage tube body in parallel, the outer wall of the flushing pipe is fixed with the outer wall of the drainage tube body, flushing liquid in the cavity of the flushing pipe enters the drainage tube body through the first flushing hole and the second flushing hole, and the flushing liquid enters the intestinal tract from the head end pipe orifice of the flushing pipe and the head end pipe orifice of the drainage tube body to be flushed. The tail end orifice of the flushing pipe is positioned near the tail end orifice of the drainage pipe body, namely outside the body, and is used as a flushing liquid injection end to inject flushing liquid into the cavity of the flushing pipe. The tail end pipe orifice of the flushing pipe and the tail end pipe orifice of the drainage pipe body can also be connected with a negative pressure suction device, and flushing liquid and excrement after intestinal tract cleaning can be drained from the pipe cavity of the flushing pipe and the tail end pipe orifice of the drainage pipe body. The tail end pipe orifice of the drainage tube body and the tail end pipe orifice of the flushing fluid can also be connected with a metering drainage bag to contain the excrement and the flushing fluid discharged by drainage.

In this embodiment, the head end refers to the end of the anal tube drainage tube inserted into the intestinal tract, and the tail end is only at the end outside the body.

As shown in figure 1, the inflatable air bag 3 is sleeved outside the flushing pipe 4 and the head end of the drainage tube body 2, the inflatable air bag is spherical, the most prominent part of the inflatable air bag is attached to the intestinal wall to support a certain space for the drainage tube body, and the problem that the drainage is not smooth due to the fact that the mouth of the head end of the drainage tube body is abutted to the intestinal wall is avoided. The inflation end of the inflation air bag is also positioned near the pipe orifice at the tail end of the drainage pipe body, and when the anal tube drainage pipe is inserted into the body for operation, the inflation end of the inflation air bag is positioned outside the body, so that the inflation and deflation operation is facilitated.

As shown in FIG. 2, a plurality of radial expanders 1 are arranged along the axial direction of the drain body 2, the radial expanders 1 are used for expanding the diameter of the drain body 2, and the plurality of radial expanders 1 are arranged in a radial direction of the drain body 2 in a crossed manner. The plurality of radial expanders 1 arranged along the axial direction can increase the axial expansion length of the drainage tube body 2, thereby improving the expansion effect and reducing the blockage. The number of the axial radial expanders 1 in the drainage tube body 2 is set according to the actual expansion length and the circumferential expansion degree requirement, and can penetrate through the length of the whole drainage tube body 2.

The drainage tube body is a rubber tube with good elasticity and can bear the expansion of the radial expander to the maximum diameter so as not to break the tube wall of the drainage tube body.

As shown in FIG. 2, the radial expander 1 comprises a driving mechanism 11, a transmission mechanism 12 and a plurality of expanding bodies 13 axially arranged along the drainage tube body 2, the transmission mechanism 12 and the expanding bodies 13 are arranged inside the drainage tube body 2, the expanding bodies 13 are used for expanding the radial length of the drainage tube body 2, and the plurality of expanding bodies 13 axially arranged can realize the simultaneous expansion of the drainage tube body 2 to one radial direction within a certain range in the axial direction. As shown in FIGS. 2-4, the expanding body 13 comprises a plurality of expanding columns 131 sequentially sleeved from outside to inside, and the expanding columns are arranged along the radial direction of the drainage tube body, i.e. the axial direction of the expanding columns is perpendicular to the axial direction of the drainage tube body, so that radial expansion can be realized. Threaded connection between a plurality of expansion posts 131, the outmost expansion post and the drainage tube body inner wall fixed connection of expansion body, actuating mechanism's drive end stretches into drainage tube body inside and is connected with drive mechanism, actuating mechanism's drive end rotates for drainage tube body is sealed, the quantity that expands post 131 can be according to the maximum diameter length setting that needs the expansion, it makes its outer expansion post 131 rotatory play relatively through rotatory the expansion post 131 of inlayer, thereby increase the length of expansion body 13, strut drainage tube body 2's radial length, realize radial expansion. In this embodiment, all have the interval section between the external screw thread of expansion post 131 and the two tip of expansion post 131, all have the interval section between the internal screw thread of expansion post 131 and the two tip of expansion post 131, avoid expansion post 131 to screw out completely in the expansion post 131 of its outer layer, guaranteed that the expansion post 131 of inlayer screws out the maximum distance after and dies rather than the outer expansion post 131 is fixed, continue rotatory expansion post 131 of inlayer, make it can drive its outer expansion post 131 together rotatory, and then realize further expansion. The driving mechanism 11 is in transmission connection with the innermost expansion columns 131 of all the expansion bodies 13 through the transmission mechanism 12, the driving mechanism 11 drives the rest expansion columns 131 except the outermost expansion column to rotate in sequence, and through the arrangement of the transmission mechanism 12, the driving mechanism 11 can simultaneously drive all the innermost expansion columns 131 to rotate, and the specific expansion method is as follows: the driving mechanism 11 first drives the expansion column 131 at the innermost layer to rotate, so that the expansion column 131 at the innermost layer rotates relative to the expansion column 131 at the outer layer to realize expansion; after the innermost expansion column 131 rotates to the maximum length, the innermost expansion column 131 and the outer expansion column 131 are fixedly locked, the innermost expansion column 131 can drive the outer expansion column 131 to rotate relative to the outer expansion column 131, the length of the expansion body 13 is further increased, and by analogy, the maximum radial length expansion can be realized. The expansion body 13 of a plurality of radial expanders 1 is arranged in the radial direction in a crossed manner, so that the radial direction is expanded in a multi-azimuth manner, the circumferential expansion of the drainage tube body 2 is even as far as possible, the expansion effect is also improved, the expansion in a certain diameter direction is avoided, and other diameter directions contract on the contrary. Make a plurality of footpath of drainage tube body 2 realize the expansion, realize the ascending even expansion of drainage tube body 2 circumference.

As shown in fig. 2 and 5, the transmission mechanism 12 includes a driving sprocket 121, a transmission chain 122 and a number of driven sprockets 123 corresponding to the number of the expansion bodies 13, the driven sprockets 123 are coaxially connected with the expansion columns 131 at the innermost layer of the expansion bodies 13 in a one-to-one correspondence manner, the driving sprocket 121 and the driven sprockets 123 are both meshed with the transmission chain 122, the transmission chain 122 is in transmission connection with the driving sprocket 121 and all the driven sprockets 123, the driving sprocket 121 is fixedly connected with the driving mechanism 11, and the driving mechanism 11 drives the driving sprocket 121 to rotate. The driving mechanism 11 drives the driving sprocket 121 to rotate, and since the driving sprocket 121 is meshed with the transmission chain 122, the transmission chain 122 rotates to drive all the driven sprockets 123 meshed therewith to rotate simultaneously, so that the expansion columns 131 of the innermost layers of all the expansion bodies 13 rotate to realize expansion.

In some embodiments, the driving mechanism 11 is a rotating handle, the rotating handle is coaxially connected to the driving sprocket 121, and the driving sprocket 121 is driven to rotate by the rotating handle, so as to achieve the expansion. This is a manual drive.

In other embodiments, the driving mechanism 11 is a driving motor, the driving motor is a micro driving motor, and an output shaft of the driving motor is coaxially connected to the driving sprocket 121 to drive the driving sprocket 121 to rotate, which is an electric driving manner.

In this embodiment, the expansion body 13 includes 3 expansion columns 131, including one-level expansion column, second grade expansion column and the third grade expansion column that is established by outer and interior cover in proper order, and third grade expansion column is the expansion column of inlayer. The third-level expansion column is connected with the driving mechanism 11, when the expansion is carried out, the driving mechanism 11 firstly drives the third-level expansion column to rotate, the third-level expansion column rotates out of the second-level expansion column, and if the radial expansion requirement is met, the rotation can be stopped. If not reach radial expansion demand, then continue to drive tertiary expansion post rotatory, when tertiary expansion post back-out maximum distance, tertiary expansion post is no longer rotatory relative second grade expansion post, tertiary expansion post and second grade expansion post card die, actuating mechanism 11 continues the drive, it is rotatory simultaneously to drive tertiary expansion post and second grade expansion post, the second grade expansion post back-out one-level expansion post, when secondary expansion post back-out maximum distance, realize the biggest radial expansion distance, the state after the expansion is as shown in FIG. 3. If the expander is not required to be expanded and contracted to the initial state, the driving mechanism 11 drives the expansion column 131 to rotate in a reverse direction, the driving mechanism drives the third-stage expansion column to rotate and contract back to the interior of the second-stage expansion column, after the contraction is finished, the third-stage expansion column drives the second-stage expansion column to rotate relative to the first-stage expansion column, the second-stage expansion column rotates and contracts back to the interior of the first-stage expansion column, and the contracted state is shown in fig. 4.

In the present embodiment, the number of the radial expanders 1 is 2, and 2 radial expanders 1 are vertically arranged in the radial direction of the drainage tube body 2. The 2 radial expanders 1 are arranged at intervals in the axial direction as required, but the expansion among each other is not influenced, and the radial direction is vertically arranged, so that the circumferential direction of the drainage tube body 2 can be almost uniformly expanded.

As shown in FIGS. 2-4, the driving end of the driving mechanism 11 extends from the outside of the drain body 2 into the drain body 2, and the driving end of the driving mechanism 11 can be rotated in a sealing manner with respect to the drain body 2; the transmission mechanism 12 and the expansion body 13 are both positioned inside the drainage tube body 2, the end part of the expansion column 131 at the outermost layer of the expansion body 13 is fixed on the inner wall of the drainage tube body 2, the expansion column 131 at the outermost layer is fixed and can not rotate relative to the drainage tube body 2, the expansion column 131 at the innermost layer of the expansion body 13 rotates relative to the inner wall of the drainage tube body 2 and also supports against the inner wall of the drainage tube body 2, and therefore radial expansion is achieved by rotating the expansion column except for the outermost layer.

As shown in fig. 1, the anal tube drainage tube of the present embodiment further comprises a pressure sensor 5, wherein the pressure sensor 5 is disposed inside the drainage tube body 2 and located at the head end of the drainage tube body 2 for detecting the pressure in the intestinal lumen.

In some embodiments, the anal tube drainage tube of this embodiment further includes a pressure display screen 6, the pressure display screen 6 is electrically connected to the pressure sensor 5, the pressure display screen 6 adopts a commonly used LED display screen, and the pressure display screen 6 is used for displaying a pressure value. And a signal conversion device is connected between the pressure sensor and the pressure display screen, converts the pressure signal into an electric signal and finally displays the electric signal on the pressure display screen. The medical staff can observe the pressure value condition in the body from the outside of the body.

The using method of the anal canal drainage tube comprises the following steps: 1. after the anal tube drainage tube is placed in a body, air can be filled into the inflatable air bag from the inflatable end of the inflatable air bag to enable the inflatable air bag to be inflated, the wall of the inflated inflatable air bag can be attached to the intestinal wall, and the problem that drainage is not smooth due to the fact that the head end of the drainage tube body props against the intestinal wall is avoided; 2. liquid such as enema, clear water and the like can be injected from the flushing liquid injection end of the flushing pipe, and flows out from the pipe orifice at the head end of the drainage pipe body, the first flushing hole on the side wall of the flushing pipe and the pipe orifice at the end of the flushing pipe head to flush the intestinal tract, when in injection, the pressure change can be observed through the pressure display screen due to the pressure rise in the intestinal cavity, and excrement can flow out from the pipe cavity of the flushing pipe and the pipe orifice at the tail end of the drainage pipe body after being injected or cleaned into the intestinal tract (at the moment, the pipe orifice at the tail end of the drainage pipe body and the pipe orifice at the tail end of the flushing pipe can be connected with a measuring drainage bag); 3. when the anal tube drainage tube is placed into a body, the radial dilator is in a contraction state, a driving mechanism (a driving motor is started or a rotating handle is rotated) can be started after the anal tube drainage tube is placed into the back body, all the three-stage dilating columns of the dilating body of the radial dilator are simultaneously rotated through transmission of a transmission mechanism, if the three-stage dilating columns are rotated to the maximum length, the ideal dilating diameter cannot be reached, the driving state of the driving device can be continuously kept, and at the moment, the second-stage dilating columns start to rotate to continuously dilate the radial dilator to increase the diameter; and meanwhile, the flushing liquid flushing and expander has better expansion effect, so that the phenomenon that the liquid stays in the intestinal cavity after the flushing liquid is flushed into the intestinal cavity to cause overhigh pressure in the intestinal cavity is avoided.

Through the diameter of expansion drainage tube body, reduce the jam in the lumen, the drainage is unobstructed, avoids leading to the intestinal injury that pressure increase caused because of the jam.

After drainage is finished, the expansion column can be rotated reversely by the driving mechanism, so that the radial expander is recovered to the initial contraction state, and then the anal canal drainage tube is taken out.

The invention is suitable for various patients needing to use the anal tube drainage tube, such as: patients who need to keep in the anal canal for air exhaust, patients who need to wash the intestinal tract or patients who need to measure the pressure in the intestinal tract, and the like.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.

In the present invention, unless otherwise explicitly stated or limited, the terms "mounted," "connected," "fixed," and the like are to be construed broadly, e.g., as being permanently connected, detachably connected, or integral; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.

In the description herein, references to the description of the term "the present embodiment," "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any at least one embodiment or example. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and simplifications made in the spirit of the present invention are intended to be included in the scope of the present invention.

Claims

1. An anal canal drainage tube is characterized by comprising a drainage tube body (2), an inflatable air bag (3), a flushing tube (4) and a radial expander (1),

the flushing pipe (4) is fixed outside the drainage pipe body (2) and used for flushing and draining, a first flushing hole (41) is formed in the side wall of the flushing pipe (4), a second flushing hole (21) is formed in the drainage pipe body (2), the first flushing hole (41) is communicated with the second flushing hole (21),

the inflatable air bag (3) is sleeved outside the flushing pipe (4) and the head end of the drainage tube body (2),

the radial expanders (1) are arranged along the axial direction of the drainage tube body (2), the radial expanders (1) are used for expanding the diameter of the drainage tube body (2), and the radial expanders (1) are arranged in a radial direction of the drainage tube body (2) in a crossed mode.

2. The anal canal drainage tube according to claim 1, wherein the radial dilator (1) comprises a driving mechanism (11), a transmission mechanism (12) and a plurality of expansion bodies (13) arranged along the axial direction of the drainage tube body (2), the transmission mechanism (12) and the expansion bodies (13) are arranged inside the drainage tube body (2), the expansion bodies (13) comprise a plurality of expansion columns (131) sequentially sleeved from outside to inside, the expansion columns (131) are in threaded connection with each other, the expansion column at the outermost layer of the expansion body is fixedly connected with the inner wall of the drainage tube body, the driving end of the driving mechanism extends into the drainage tube body to be connected with the transmission mechanism, the driving mechanism (11) is in transmission connection with all the expansion columns (131) at the innermost layer of the expansion bodies (13) through the transmission mechanism (12), the driving mechanism (11) drives the expansion columns (131) except the expansion column at the outermost layer to rotate sequentially, and the expansion bodies (13) of the radial dilators (1) are arranged in a radial cross manner.

3. The anal canal drainage tube as set forth in claim 2, wherein the transmission mechanism (12) comprises a driving sprocket (121), a transmission chain (122) and driven sprockets (123) corresponding to the number of the expansion bodies (13), the driven sprockets (123) are coaxially connected with the expansion columns (131) at the innermost layer of the expansion bodies (13) in a one-to-one correspondence manner, the driving sprocket (121) and the driven sprockets (123) are both meshed with the transmission chain (122), the transmission chain (122) is in transmission connection with the driving sprocket (121) and all the driven sprockets (123), the driving sprocket (121) is fixedly connected with the driving mechanism (11), and the driving mechanism (11) drives the driving sprocket (121) to rotate.

4. The anal canal drainage tube according to claim 2 or 3, wherein a space is provided between the external thread of the expansion column (131) and both ends of the expansion column (131), and a space is provided between the internal thread of the expansion column (131) and both ends of the expansion column (131).

5. Anal canal drain according to claim 2 or 3, characterized in that the drive means (11) is a rotary knob or a drive motor.

6. Anal tube drain according to claim 1, further comprising a pressure sensor (5), said pressure sensor (5) being arranged inside the drain body (2).

7. The anal canal drainage tube according to claim 6, further comprising a pressure display screen (6), wherein the pressure display screen (6) is electrically connected with the pressure sensor (5).

8. Anal canal drainage tube according to claim 1, characterized in that the number of radial dilators (1) is 2, 2 of said radial dilators (1) being arranged vertically in the radial direction of the drainage tube body (2).