CN111281464A - anorectal surgery fixed pants - Google Patents

Abstract

The invention relates to anorectal post-operative fixing pants, belonging to the technical field of medical treatment. The fixed pants are convenient and practical, are more conducive to ventilation, improve the comfort of the patient, and the dressing can be closely attached to the perianal skin, which is beneficial to the recovery of the patient. The drainage tube can be attached to or detached from the fixed trousers through threads, and can be used as required. A drainage tube is used on the day of the operation. On the one hand, the main tube can effectively assist the patient to exhaust after the operation, and observe the drainage and whether there is bleeding; The function of hemostasis is very good to prevent the occurrence of primary hemorrhage on the high wound surface after operation; on the other hand, the second branch is used to facilitate postoperative irrigation and exploration, perfusion of hemostatic drugs and therapeutic drugs, etc. After that, only the sterile dressing is used, and the sterile dressing can also be disassembled. The sterile dressing is pasted on the body of the fixed pants, and the sterile dressing can be replaced as required.

Description

anorectal surgery fixed pants

technical field

The invention relates to an anorectal post-operative fixing trousers capable of attaching and detaching a drainage tube, belonging to the technical field of medical treatment.

Background technique

For hemorrhoids, anal fissures, perianal abscesses, anal fistulas, anal trauma, and rectal tumors, due to the particularity of their locations, postoperative dressings are not easy to fix.

Because the traditional T-shaped belt has no elasticity, it is not easy for patients to adjust the tightness by themselves. If it is too tight, the patient will feel uncomfortable. If it is too loose, the effect of fixing the dressing and compressing the bleeding will not be achieved. Moreover, the size of the T-shaped belt is small, and the patient will feel uncomfortable after fixing, and even the skin of the waist. Pressure injury occurs, and the simple T-shaped belt passes through the perineum, which will affect the blood circulation of the male penis and scrotum, and is inconvenient for the patient to urinate, or open the T-shaped belt when the patient urinates, causing the anal dressing to fall off, causing surgical wound pollution and affecting wound healing. . The anal wound needs to be changed and cared for after surgery. Hospitals generally use gauze to cover and wrap wounds, usually a square towel with four ends fastened to the wound. The gauze of this fixing method is easy to move, the dressing is easy to fall off, and it is easy to cause infection of the incision, which increases the pain for the patient, and the medical staff needs to re-bandage in time, which increases the work of the medical staff.

SUMMARY OF THE INVENTION

The technical problem to be solved by the present invention is: to propose a kind of post-anorectal fixation pants, which is convenient and practical, is more conducive to ventilation, improves the comfort of patients in use, the dressing can be closely attached to the perianal skin, and can be widely used for repair and Improve postoperative complications such as mixed hemorrhoids, anal fissures, anal fistulas and other anal diseases such as bleeding, pain, edema and bulging. benefit the patient's recovery. On the day after the operation, a drainage tube can be installed. On the one hand, the main tube can effectively assist the postoperative patient to exhaust gas and observe the drainage to see if there is bleeding; To the role of fixation, compression and hemostasis, it is very good to prevent the occurrence of primary hemorrhage on the high wound surface after operation; on the other hand, the second branch is used to facilitate postoperative irrigation and exploration, infusion of hemostatic drugs and therapeutic drugs, etc.

The technical solution proposed by the present invention to solve the above-mentioned technical problems is as follows: a kind of post-anorectal fixed trousers, comprising a fixed trousers body and a sterile dressing; The left and right sides of the connecting belt also include elastic bands and sticking strips; the buttocks fixing sheet is provided with an oval groove, and a sterile dressing can be placed in the groove, and the shape of the sterile dressing is an oblong shape; the The sterile dressing adopts a three-layer structure, including a surface layer, a coating layer and a bottom layer. The surface layer is made of medical sterile gauze or pure cotton non-woven material, which has good drug permeability; the coating layer is divided into a front drug layer and a rear water absorption layer. The two parts of the cotton layer are separated by a diaphragm; the drug layer is a traditional Chinese medicine preparation for hemostasis and swelling; the bottom layer is made of PE breathable film; In this way, after the anus is treated with the drug layer for hemostasis and swelling, the fluid from the anus can flow into the absorbent cotton layer at the back end of the dressing through the diversion groove to prevent the liquid from accumulating in the anus, and the liquid quickly penetrates into the absorbent cotton layer. , to prevent the liquid from accumulating on the surface and causing infection. When using the dressing, install the oval dressing in the groove of the fixed pants body through the glue on the back of the PE breathable film at the bottom layer, and the dressing will not fall off during the patient's movement. The biological dressing is composed of raw materials in the following weight percentages: 6 parts of Corydalis, 8 parts of Panax notoginseng, 6 parts of Chinese prickly ash, 3 parts of dried blood, 3 parts of Coptis chinensis, 2 parts of frankincense, and 1 part of borneol.

Preferably, it can also include a drainage pipe, the middle of the drainage pipe is provided with threads, and the center of the buttocks fixing piece of the fixing pants is provided with a threaded hole, which is threadedly connected with the drainage pipe passing through the threaded hole, and the thread in the middle of the drainage pipe is smaller than the thread. The holes are installed together to prevent the drainage tube from sliding into the rectum; the drainage tube includes a main pipe, a balloon, a first branch pipe and a second branch pipe, both of which are placed in the main pipe, and the front end of the main pipe has a side hole on each side , to ensure smooth drainage, the front end of the main pipe is provided with a balloon, the operation ports of the first branch pipe and the second branch pipe are located at the rear end of the main pipe, and the first branch pipe is a pipe with a spring check valve at the tail from the main pipe. Internally connected to the balloon, a syringe can be used to connect the spring one-way valve of the first branch tube, and normal saline or gas can be injected through the one-way valve to inflate the balloon to prevent the tube from slipping out and to compress and stop bleeding. The second branch pipe extends from the main pipe to the main pipe port and is longer than the main pipe. The tail of the second branch pipe is provided with a rubber stopper. When the stopper is opened, normal saline can be injected through the second branch pipe for flushing, or related therapeutic drugs can be injected. An orifice can also be provided on the sterile dressing, so that the drainage tube can be inserted and used together.

Preferably, the adhesive strip of the connecting tape is a thorn surface Velcro, the surface of the front webbing is a matte surface velcro, and the connection tape and the front panel are closely adhered through the thorn surface and the matte surface velcro.

Preferably, the elastic band is made of environmentally friendly paper.

Preferably, the front webbing, the bottom crotch anus, the buttocks fixing sheet and the connecting belt are all made of breathable materials.

Preferably, considering the wearing comfort of male patients, an opening is provided in front of the bottom crotch.

Preferably, the sterile dressing is pasted on the body of the fixed pants.

Preferably, two annular bayonet openings are provided in the main pipe for fixing the branch pipes, which can prevent the two branch pipes from being entangled in the main pipe.

Preferably, both the main pipe and the branch pipe are pipes made of natural rubber, silicone rubber or polyvinyl chloride.

Preferably, the front port of the main pipe is set in a wedge shape and coated with grease such as Vaseline, which is convenient for use.

Beneficial effects:

The drainage tube can be attached to or detached from the fixed trousers through threads, and can be used as required. A drainage tube was used on the day of surgery, followed by a sterile dressing.

The sterile dressing is also detachable, the sterile dressing is pasted on the body of the fixed pants, and the sterile dressing can be replaced as required. The preparation method of the biological dressing is as follows: according to the formula, weigh the above Corydalis Corydalis 6g, Panax notoginseng 8g, Zanthoxylum bungeanum 6g, Draconis 3g, Coptis chinensis 3g, Frankincense 2g and Borneol 1g. It is mainly used for local treatment of postoperative wounds of mixed hemorrhoids, anal fissures, anal fistulas and other anal diseases after operation; it has the functions of clearing away heat and detoxifying, promoting blood circulation and removing blood stasis, dredging collaterals, reducing inflammation and relieving pain.

The bottom crotch of the fixed trousers of the present invention is provided with an opening, which is convenient for male patients to use and does not compress the genitals.

The drainage tube provided by the present invention can inject water or physiological saline into the balloon through the first branch tube to inflate the balloon, and the balloon inflation can play the role of compression and hemostasis, and the second branch tube extends from the main tube to the main tube port and is longer than the main tube , the wound surface can be washed with hemostatic drugs or normal saline through the second branch pipe, the wound surface condition of the patient can be explored, the pain of the patient is reduced, and it is convenient for medical staff to use.

The adhesive strip of the connecting tape is a thorn surface Velcro, the surface of the front webbing is a matte surface Velcro, the connecting tape and the front webbing can be closely adhered through the Velcro, which is very convenient to use and easy to adjust the tightness. Spend.

The elastic material on the connecting belt can ensure the adjustment of the tightness, avoid discomfort for the patient, prevent pressure damage to the skin of the waist, will not affect the blood circulation of the male penis and scrotum, and will not cause the anus dressing to fall off, and the present invention has a great clinical effect. Practical value, easy for patients to use.

Description of drawings

The present invention will be further described below in conjunction with the accompanying drawings.

FIG. 1 is a schematic view of the structure of the fixing pants of Example 1. FIG.

FIG. 2 is a schematic structural diagram of the drainage tube in Example 1. FIG. .

FIG. 3 is a cross-sectional view taken along the line A-A in FIG. 2 .

FIG. 4 is a partial enlarged view of part B in FIG. 2 .

Among them: 1-fixing the body of the trousers, 2-sterile dressing, 3-front webbing, 4-bottom crotch, 5-hip fixing piece, 6-connecting tape, 7-elastic band, 8-adhesive strip, 9-groove , 10-guiding groove, 11-threaded hole, 12-drainage tube, 13-thread, 14-main pipe, 15-balloon, 16-first branch pipe, 17-second branch pipe, 18-side hole, 19-spring Check valve, 20-rubber stopper, 21-opening, 22-ring bayonet.

Detailed ways

Example 1

The fixed pants for post-anorectal surgery with removable drainage tubes in this embodiment include a fixed pants body 1 and a sterile dressing 2. The fixed pants body 1 includes a front panel 3, a bottom crotch 4, a buttocks fixing piece 5 and a connecting belt 6, the left and right sides of the connecting belt 6 also include an elastic band 7 and an adhesive strip 8; the buttocks fixing sheet 5 is provided with an oval groove 9, and the aseptic dressing 2 can be placed in the groove 9, and the sterile The shape of the dressing 2 is an oblong or oval shape; the sterile dressing 2 adopts a three-layer structure, including a surface layer, a coating layer and a bottom layer, and the surface layer is made of medical sterile gauze or pure cotton non-woven material, which penetrates the drug. Good performance; the coating layer is divided into two parts: the front drug layer and the rear absorbent cotton layer, separated by a diaphragm; the drug layer is a traditional Chinese medicine preparation for hemostasis and swelling; the bottom layer is made of PE breathable film; the surface layer of sterile dressing 2 A diversion groove 10 is provided, and the diversion groove 10 is arranged in the middle and rear part of the surface layer of the dressing 2, so that after the postoperative anus passes the drug care of hemostasis and swelling of the drug layer, the liquid flowing out of the anus can flow into the dressing through the diversion groove 10 at the same time. 2. The absorbent cotton layer at the back end prevents liquid from accumulating at the anus, and the liquid quickly penetrates into the absorbent cotton layer to prevent the liquid from accumulating on the surface and causing infection. Installed in the groove 9 of the body 1 of the fixed trousers, the dressing 2 will not fall off during the patient's movement and use, and a threaded hole 11 is provided in the center of the buttocks fixing sheet 5 of the fixed trousers, and the sterile dressing 2 is pasted on the body 1 of the fixed trousers. .

It can also include a drainage tube 12, the middle part of the drainage tube 12 is provided with a thread 13, and the center of the buttocks fixing piece 5 of the fixed pants is provided with a threaded hole 11, which is threadedly connected with the drainage tube 12 passing through the threaded hole 11, and the middle part of the drainage tube 12 is The screw thread 13 is installed in cooperation with the threaded hole 11 to prevent the drainage tube 12 from sliding into the rectum; the drainage tube 12 includes a main pipe 14, a balloon 15, a first branch pipe 16 and a second branch pipe 17, and the two branch pipes are placed in the main pipe 14. Inside, there are side holes 18 on both sides of the front end of the main pipe 14 to ensure smooth drainage. The front end of the main pipe 14 is provided with a balloon 15, and the operation ports of the first branch pipe 16 and the second branch pipe 17 are located in the main pipe. At the rear end of 14, the first branch pipe 16 is a pipe with a spring one-way valve 18 at the tail that communicates from the main pipe 14 to the balloon 15, and a syringe can be used to connect the spring one-way valve 18 of the first branch pipe 16, through the one-way valve 18 Physiological saline or gas is injected to inflate the balloon (15) to prevent the tube from slipping out and to compress and stop bleeding; the second branch tube 17 extends from the main tube 14 to the port of the main tube 14 and is longer than the main tube 14. The second branch tube 17 is longer than the main tube 14. The tail of the branch pipe 17 is provided with a rubber plug 19. When the rubber plug 19 is opened, normal saline can be injected through the second branch pipe 17 for flushing, or related therapeutic drugs can be injected; With the use of.

The adhesive strip 8 of the connecting tape 6 is a thorn surface Velcro, the surface of the front webbing 3 is a matte surface Velcro, and the adhesive strip 8 and the front web tape 3 are closely adhered by the thorn surface and the matt surface Velcro. The elastic band 7 is made of environmentally friendly paper. The front webbing belt 3, the bottom crotch 4, the buttocks fixing sheet 5 and the connecting belt 6 are all made of breathable materials.

Considering the wearing comfort of male patients, an opening 21 is provided in front of the bottom crotch 4 .

Two annular bayonet openings 22 are arranged in the main pipe 14 for fixing the branch pipes, which can prevent the two branch pipes from being entangled in the main pipe 14 .

When in use, the drainage tube 12 is installed on the fixed pants body 1 through the thread 13, the medical staff opens the rubber stopper 20 of the second branch tube 17, injects physiological saline through the tail of the second branch tube 17 for cleaning, or sprays medicine, and closes the rubber after use. Plug 20, then through the tail of the first branch tube 16 to inflate the balloon 15, the balloon 15 can play the role of fixation, compression and hemostasis, then, the sterile dressing 2 ointment is placed on the medical fixed trousers, and finally the patient puts the medical fixed trousers on. fixed. The drainage tube 12 is used on the day of the operation, after which the drainage tube 12 can be removed from the fixed pants. The sterile dressing 2 is pasted on the fixing pants body 1, and the sterile dressing 2 can be replaced as required.

The preparation method of the biological dressing is as follows: according to the formula, weigh the above Corydalis Corydalis 6g, Panax notoginseng 8g, Zanthoxylum bungeanum 6g, Draconis 3g, Coptis chinensis 3g, Frankincense 2g and Borneol 1g. It is mainly used for local treatment of postoperative wounds of mixed hemorrhoids, anal fissures, anal fistulas and other anal diseases after operation; it has the functions of clearing away heat and detoxifying, promoting blood circulation and removing blood stasis, dredging collaterals, reducing inflammation and relieving pain.

clinical experiments:

1 Edema scoring standard:

0 points (no edema): the skin at the edge of the wound is soft without abnormal protrusions

1 point (mild edema): the skin protrudes at the edge of the wound, occupying ≤ 1/4 of the perianal circle

2 points (moderate edema): skin protrusions at the edge of the wound, occupying >1/4 of the perianal circle, but ≤1/2 of the circle

3 points (severe edema): the skin protrudes on the edge of the wound, occupying more than 1/2 circle around the anus

2. Anal pain: According to the international general complaint pain rating scale (VRS) to judge the degree of local pain in the anus:

Grade 0: no pain;

Grade 1: Pain is tolerable, normal life is possible, and sleep is not disturbed;

Grade 2: intolerable pain, need to take analgesics, disturbed sleep;

Grade 3: The pain is severe and intolerable, sleep is severely disturbed, and analgesics are required.

3. Anal margin edema subsidence time: two anorectal specialists agreed that the edema subsided completely, and the time was recorded to calculate the average value.

4 Patient satisfaction: The patient satisfaction was assessed by telephone follow-up after discharge or re-examination at the hospital, and it was divided into four aspects: dissatisfied, general, satisfied, and very satisfied.

Described test group adopts the biological dressing of embodiment 1, and control group adopts Mayinglong hemorrhoid ointment, and experimental result is as follows:

After one course of treatment with this topical drug, the patients in the experimental group had significantly lower anal margin edema scores than the control group (p<0.05), the anal pain was milder, the anal margin edema subsided time was significantly shortened, and the patient satisfaction was higher (p<0.05); In the experimental group, 39 cases were cured, 17 cases were markedly effective, 10 cases were effective, and 2 cases were ineffective, with a total effective rate of 97.06%. In the control group, 13 cases were cured, 12 cases were markedly effective, 17 cases were effective, and 22 cases were ineffective. %, the difference between groups was statistically significant (p<0.05), see Table 1 and Table 2 for details.

n(％))Table 1 Comparison of treatment outcomes of patients (

n(%))

Note: * is the χ ² value.

Table 2 Comparison of pain degree between two groups of patients (n)

The biological dressing of this embodiment has an effective rate of more than 97% for the local treatment of postoperative wounds for postoperative mixed hemorrhoids, anal fissures, anal fistulas and other anal diseases. It can be cured in about a day, and mild patients can be cured in about 10 days, which has the advantages of high curative effect and quick effect. It has been used clinically for decades, and the curative effect is very good.

Typical cases:

Zhang Mou, female, 35 years old, symptoms are bleeding, pain and anal bulge caused by anal fistula excision operation, adopt the anorectal post-operative fixing pants of the removable drainage tube of the biological dressing of the embodiment of the present invention, change the biological dressing every day Dressing twice, after one day of medication, no bleeding, pain relief, after four days, the pain is very little, the anus no longer bulges, after seven days of medication, the pain completely disappears, the disease is cured, and there is no recurrence so far, the clinical efficacy observation results show that The anorectal post-operative fixation pants with removable drainage tubes installed with biological dressings of the present invention are less irritating, have no toxic and side effects, are safe to use, have good permeability, have good curative effects, can fully exert their medicinal effects, and have a long duration of action. It is not easy to recur, and can be widely used to repair and improve postoperative complications such as mixed hemorrhoids, anal fissures, and anal fistulas, such as bleeding, pain, edema and bulging. effect.

Zhao, male, 40 years old, the symptoms are bleeding and pain caused after the anal fissure excision operation, adopt the anorectal post-operative fixing pants of the removable drainage tube of the biological dressing of the embodiment of the present invention 1, change the biological dressing three times every day, One day after taking the medicine, no bleeding, the pain is relieved, after three days, the pain is very little, and the comfort level is improved.

Li Mou, male, 50 years old, a patient with annular mixed hemorrhoids, hemorrhage, pain, edema and obvious local swelling of the anus after the operation of annular mixed hemorrhoids M-M, using the anorectal operation of the removable drainage tube of the resultant dressing of the present embodiment 1 After using the fixed pant agent, the hemostatic effect of the wound was satisfactory; the pain was significantly improved, and no drug analgesia was needed; the postoperative edema subsided within a week and was satisfied; after two days of medication, the feeling of anal bulge was significantly improved, the comfort was improved, and the patient was satisfied; continuous After 10 days of use, the discomfort symptoms disappeared completely.

The present invention is not limited to the above embodiments, for example: 1) the main pipe and the branch pipe are all pipes made of natural rubber, silicone rubber or polyvinyl chloride; 2) the front port of the main pipe is set into a wedge shape and coated with There are greases such as: Vaseline, easy to use; and so on. All technical solutions formed by equivalent replacements fall within the protection scope of the present invention.

Claims (10)

1. a fixed trousers after anorectal operation, it is characterized in that: comprise fixed trousers body (1), sterile dressing (2), and described fixed trousers body (1) comprises front band (3), bottom crotch (4) , the buttocks fixing sheet (5) and the connecting belt (6), the left and right sides of the connecting belt (6) also include an elastic belt (7) and an adhesive strip (8); the buttocks fixing sheet (5) is provided with an oval Shaped groove (9), a sterile dressing (2) can be placed in the groove (9), and the shape of the sterile dressing (2) is an oblong or oval; the sterile dressing (2) adopts three The layer structure includes a surface layer, a coating layer and a bottom layer. The surface layer is made of medical sterile gauze or pure cotton non-woven material, which has good drug permeability; the coating layer is divided into two parts: the front drug layer and the rear water-absorbing cotton layer. The middle is separated by a diaphragm; the drug layer is a traditional Chinese medicine preparation for hemostasis and swelling; the bottom layer is made of PE breathable film; the surface layer of the sterile dressing (2) is provided with a diversion groove (10), and the diversion groove (10) is set in the dressing (2) The middle and rear parts of the surface layer, so that after the anus is treated by the drug layer for hemostasis and swelling after the operation, the liquid flowing out of the anus can flow into the water-absorbing cotton layer at the rear end of the dressing (2) through the diversion groove (10) to avoid The liquid collects at the anus, and the liquid quickly penetrates into the absorbent cotton layer to prevent the liquid from accumulating on the surface and causing infection. When using the dressing (2), install the oval dressing (2) on the fixed pants through the glue on the back of the PE breathable film at the bottom layer. In the groove (9) of the main body (1), the dressing (2) will not fall off during the patient's moving and use, and a threaded hole (11) is provided in the center of the buttocks fixing sheet (5) of the fixing pants; the biological dressing is composed of the following weights: The percentage of raw material composition: 6 parts of Corydalis Radix, 8 parts of Panax notoginseng, 6 parts of Chinese prickly ash, 3 parts of dried blood, 3 parts of coptis, 2 parts of frankincense, 1 part of borneol; can also include a drainage tube (12), the drainage tube (12 ) is provided with a thread (13) in the middle, and a threaded hole (11) is provided in the center of the buttocks fixing piece (5) of the fixed trousers, which is threadedly connected with the drainage pipe (12) passing through the threaded hole (11), and the drainage pipe (12) The thread (13) in the middle is installed in cooperation with the threaded hole (11) to prevent the drainage tube (12) from sliding into the rectum; the drainage tube (12) includes a main pipe (14), a balloon (15), and a first branch pipe (16). ) and a second branch pipe (17), both of which are placed in the main pipe (14), and the front end of the main pipe (14) has side holes (18) on both sides to ensure smooth drainage. The front end is provided with a balloon (15), the operating ports of the first branch pipe (16) and the second branch pipe (17) are arranged at the rear end of the main pipe (14), and the first branch pipe (16) is provided with a spring single The pipeline of the valve (18) is connected from the main pipe (14) to the balloon (15), and a syringe can be used to connect the spring check valve (18) of the first branch tube (16), and the normal saline can be injected through the check valve (18). or gas to inflate the balloon (15) to prevent the tube from slipping out and to compress the hemostasis; the second branch tube (17) extends from the main tube (14) to the main tube (14) port and is longer than the main tube (14) , the second branch pipe (17) There is a rubber stopper (19) at the tail, and when the rubber stopper (19) is opened, normal saline can be injected through the second branch pipe (17) for flushing, or related therapeutic drugs can be injected; an orifice can also be provided on the sterile dressing (2). , so that the drainage tube (12) is inserted and used together. 2. post-anorectal fixation pants according to claim 1, is characterized in that: the preparation method of described biological dressing is as follows: take by weighing above Corydalis 6g, Panax notoginseng 8g, Chinese prickly ash 6g, dried blood 3g, Coptis chinensis 3g, 2 g of frankincense and 1 g of borneol were ground into fine powders, and mixed into 20-30% ointment with Vantulin. 3. The anorectal post-operative fixing trousers according to claim 1, characterized in that: the sticking strip (8) of the connecting band (6) is a thorn surface Velcro, and the surface of the front band (3) is a A surface Velcro, the adhesive strip (8) and the front web tape (3) are closely adhered through the thorn surface and the rough surface Velcro. 4. The post-anorectal fixation pants according to claim 1, wherein the elastic band (7) is made of environmentally friendly paper. 5. anorectal surgery fixing trousers according to claim 1, is characterized in that: described front band (3), bottom crotch (4), buttocks fixing sheet (5) and connecting band (6) are all breathable material manufacturing. 6. The post-anorectal fixation pants according to claim 1, characterized in that: considering the wearing comfort of male patients, an opening (21) is provided in front of the bottom crotch (4). 7. The post-anorectal fixation pants according to claim 1, characterized in that: the sterile dressing (2) is pasted on the fixation pants body (1). 8. The post-anorectal fixation trousers according to claim 1, characterized in that: the main pipe (14) is provided with two annular bayonets (22) for fixing the branch pipes, which can prevent the two branch pipes from being in the main pipe (14) twine. 9 . The post-anorectal fixation pants according to claim 1 , wherein the main pipe ( 14 ) and the branch pipe are pipelines made of natural rubber, silicone rubber or polyvinyl chloride. 10 . 10. The post-anorectal fixation pants according to claim 1, characterized in that: the front port of the main pipe (14) is set in a wedge shape, and is coated with grease such as Vaseline, which is convenient to use.

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