Anal canal compression hemostasis cannula

Abstract

The invention discloses a multifunctional anal tube compression hemostasis cannula, and relates to the technical field of medical instruments, in particular to a multifunctional anal tube compression hemostasis cannula which comprises a breather pipe, an air bag is wrapped outside the breather pipe, and an air bag inflation head is arranged at the side end of the air bag. The breather pipe is made of hard plastic, the diameter is about 1 cm, the length is 7-8 cm, and the two ends of the breather pipe are hollow. The air bag is tightly attached to the outer side of the circumference of the breather pipe, can be inserted into the anus along with the breather pipe when not inflated, and expands and compresses to stop bleeding after being inflated. After the air bag is inflated, the middle is slightly thin, the diameter is about 3cm, the two ends are expanded, the diameter is about 4cm, and the whole air bag is dumbbell-shaped. The length of the inflation tube connected with the inflation head is 3-4 cm, the size of the inflation tube is 1.5-2 cm, inflation and deflation and pressure maintaining of the air bag can be controlled, and the compression force can be adjusted. The cannula can keep the anal tube to be exhausted, is easy to insert without being inflated, and can be used for hemostasis by compression, auxiliary anal dilatation and prevention of slippage after being inflated.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, specifically to a multifunctional anal canal compression hemostasis cannula. Background Technology

[0002] In the field of clinical anorectal surgery, hemorrhoidectomy, fistula incision, anal fissure repair, and removal of polyps in the lower rectum are common treatment methods. These surgeries typically involve operations on vascularized tissue near the dentate line, making postoperative wound oozing or active bleeding highly likely. Traditional hemostasis methods mainly include the following: The first step is to use medication to stop the bleeding, which involves methods such as applying thrombin powder locally, packing with gauze containing adrenaline, or using hemostatic sponges to promote blood clotting. However, for larger arterial hemorrhages or diffuse oozing, medication alone is often slow to take effect and its effectiveness is unstable, which can easily lead to postoperative secondary anemia or require a second surgical exploration to stop the bleeding.

[0003] The second method is suturing and ligation for hemostasis. Although this is the most accurate way to stop bleeding, the procedure needs to be performed under anesthesia. Furthermore, for wounds located in the curved part of the anal canal, where the field of vision is difficult to expose, or where there is severe tissue edema, the suturing operation is difficult, and too many suture ends may increase the risk of foreign body reaction and infection.

[0004] Another method involves using existing physical compression devices, such as rubber gloves / finger cots, condoms, or simple balloon catheters for packing and compression. While these methods are simple to perform, they have significant drawbacks: (1) Impaired gas expulsion: Most existing simple balloon catheters are designed to be solid or have only an air vent at the end, which blocks the anal tube and also blocks the passage for intestinal gas to be expelled. When patients lie flat after surgery, the intestinal gas cannot be expelled, which leads to unbearable abdominal distension and even affects respiratory and circulatory functions, forcing medical staff to frequently manually expel gas or change dressings.

[0005] (2) Uneven pressure and displacement: Simple fillers are mostly columnar structures, which are difficult to adapt to the physiological curvature (anorectal angle) at the junction of the anorectal canal. Due to the lack of an effective anchoring mechanism and uniform radial pressure distribution, the filler is very easy to be displaced due to changes in the patient's body position or sphincter contraction, resulting in displacement of the pressure point and failure of hemostasis.

[0006] (3) Difficulty in removal and mucosal damage: When the filler is left in place for a long time and adheres to the wound, it is easy to cause secondary tearing and severe pain if forcibly removed. In addition, traditional balloon catheters are mostly spherical or cylindrical after inflation, and the end lacks a cushioning design, which can easily directly compress the seminal vesicles or prostate area on the anterior wall of the rectum, causing extreme discomfort or even urinary retention in patients.

[0007] In summary, there is an urgent need in the existing technology for a specialized hemostatic device that can effectively stop bleeding from the anal canal stump, preserve the air passage, and has good compliance and fixation capabilities. Summary of the Invention

[0008] The purpose of this invention is to provide a multifunctional anal cannula for compression hemostasis. It maintains airflow through a venting tube, and the balloon is inflated into a dumbbell shape to achieve stable compression hemostasis. It is easy to insert when deflated and easy to remove after the treatment is completed by deflating. It can also be used for gradual anal dilation after surgery, improving ease of use and treatment effect.

[0009] To achieve the above objectives, this invention provides the following technical solution: a multifunctional anal cannula compression hemostatic cannula, wherein an air bladder is provided at the outer end of the ventilation tube, and an air bladder inflation head is provided at the side end of the air bladder. The cannula uses the ventilation tube as its main support structure, and the externally connected air bladder can be inflated when needed, applying physical pressure to the bleeding area within the anal canal to achieve hemostasis. The air bladder inflation head at the side end is an independently controllable component, capable of precisely controlling the inflation volume of the air bladder, maintaining pressure, and expelling gas, allowing the operator to flexibly adjust the compression intensity according to the patient's actual bleeding situation and tolerance. The coordinated design of the ventilation tube and the air bladder ensures smooth insertion of the cannula and forms stable pressure after inflation. Furthermore, the presence of the inflation head makes the entire hemostasis process adjustable and controllable, improving the convenience and effectiveness of clinical use.

[0010] Furthermore, the ventilation tube is made of rigid plastic, with a diameter of approximately 1 cm and a length of 7 to 8 cm, both ends of which are open to maintain a hollow state. The rigid plastic material provides the ventilation tube with appropriate hardness and toughness, maintaining its shape stability and preventing deformation that could affect insertion and positioning, while also reducing unnecessary irritation to the anal canal mucosa during insertion. The approximately 1 cm diameter design conforms to the physiological channel size of most adult anal canals, and the 7 to 8 cm length allows the outer balloon to cover the main bleeding areas of the anal canal, ensuring accurate balloon compression. The open, hollow structure at both ends ensures that the tube does not impede normal anal canal ventilation after insertion, maintaining unobstructed intestinal gas expulsion and preventing discomfort caused by gas retention, thus balancing hemostasis and the preservation of physiological function.

[0011] Furthermore, the air bladder fits snugly against the outer circumference of the ventilation tube, ensuring structural stability without any loosening or detachment. In its deflated state, the air bladder can be inserted into the anus along with the ventilation tube, and its inflation provides pressure for hemostasis. This tight fit between the air bladder and the ventilation tube eliminates any gaps or loosening, ensuring the overall stability of the cannula and preventing relative displacement during operation or compression. In its deflated state, the compact air bladder smoothly enters the anus along with the ventilation tube, reducing insertion resistance and patient discomfort. Upon inflation, the air bladder expands evenly and applies continuous pressure to a specific area of ​​the anal canal wall, physically compressing and blocking blood flow to the bleeding point to achieve hemostasis. This combination of a snug fit and inflation / deflation function ensures both convenient insertion and reliable hemostasis.

[0012] Furthermore, the air bladder, after inflation, is slightly thinner in the middle (approximately 3 cm in diameter) and expands at both ends (approximately 4 cm in diameter), forming an overall dumbbell shape to enhance stability. The expansion of over 3 cm in diameter after inflation provides sufficient pressure on the anal canal wall, effectively targeting the bleeding site. The dumbbell shape increases the contact area and friction between the air bladder and the anal canal wall, preventing it from sliding deeper into the rectum or dislodging due to changes in body position when the cannula is inflated and compressed. This significantly improves the cannula's positional stability during continuous use, ensuring sustained hemostasis.

[0013] Furthermore, the inflation tube connected to the airbag inflation head has an overall length of 3 to 4 centimeters, and the inflation head itself is approximately 1.5 to 2 centimeters in size. Located on the side of the airbag, it is directly used for controlling the inflation and deflation of the airbag. The 3 to 4 centimeter length of the inflation tube avoids excessive length leading to tangling and inconvenience, while also providing sufficient operating space for easy gripping and application of force by medical personnel. The 1.5 to 2 centimeter size of the inflation head conforms to the comfortable range of hand operation, facilitating precise pinching and control. Its location on the side of the airbag shortens the connection path, reducing gas loss and delay during inflation and deflation, and making pressure adjustment more sensitive. Using a syringe, the entire process of inflation, pressure maintenance, and deflation can be directly completed through this inflation head, simplifying clinical procedures and improving the response speed and controllability of the hemostasis process.

[0014] Furthermore, the airbag inflation head is located at the side of the airbag and is used to control the inflation, pressure holding, and deflation processes of the airbag, thereby adjusting the pressure. Positioning the inflation head at the side of the airbag ensures that the operating point is close to the area of ​​pressure application, allowing medical personnel to quickly adjust the pressure while observing the patient's response, thus improving operational efficiency. This inflation head integrates inflation, pressure holding, and deflation functions into one unit. By connecting a syringe for injection or aspiration, the different states of inflation and deflation can be switched: during inflation, the airbag pressure is increased to enhance hemostasis; once the airbag reaches an appropriate inflation level, removing the syringe maintains the current pressure to ensure continuous action; during deflation, the pressure is reduced to allow for position adjustment or replacement / removal of the cannula. This integrated control design allows the pressure to be flexibly adjusted according to the patient's bleeding rate, pain feedback, and other real-time conditions, avoiding excessive pressure that could cause tissue damage, or insufficient pressure that could lead to hemostasis failure.

[0015] Furthermore, the overall diameter of the inflated balloon can reach over 3 cm to ensure effective pressure on the bleeding site in the anal canal. The design of approximately 3 cm in diameter at the center of the inflated cannula is based on considerations of the anal canal's anatomy and actual hemostasis requirements—a sufficient diameter allows the contact surface between the balloon and the bleeding area within the anal canal to fully adhere, evenly transmitting pressure to the blood vessel wall and effectively blocking blood flow from the damaged vessel. A diameter that is too small may result in insufficient pressure on the anal canal, leading not only to poor hemostasis but also to cannula slippage; while a diameter of 3 cm or more ensures even pressure distribution while creating a stable compression area, making it particularly suitable for controlling different bleeding types, such as arterial or venous bleeding. This diameter setting balances hemostasis effectiveness with tissue safety, enhancing the cannula's adaptability to various bleeding conditions.

[0016] Furthermore, the two ends of the balloon expand after inflation, giving the entire cannula a dumbbell shape. This ensures that the cannula will not slip out of the rectum or outside the body during continuous inflation and pressure for hemostasis. The dumbbell-shaped structure, with its expanded ends and slightly narrower middle, overcomes the tendency of traditional circular balloons to slip. This design adapts to the physiological structure of the lower rectum (expanded), anal canal (constricted), and external anus (wider). When the patient is in different positions, such as lying down or sitting, the expanded ends effectively resist the displacement force generated by gravity or muscle contraction, preventing the cannula from slipping deeper into the rectum, increasing the difficulty of operation, or slipping out of the body, causing interruption of pressure. This structural design allows the cannula to maintain a stable position during prolonged continuous pressure for hemostasis, ensuring that the hemostatic pressure always acts on the target area and avoiding secondary bleeding or hemostasis failure caused by displacement.

[0017] Furthermore, the hollow structure of the ventilator tube continuously maintains the anal tube's air-expelling function during insertion. The open, hollow structure at both ends of the ventilator tube remains connected to the intestinal gas expulsion channel even after the tube is fully inserted into the anal tube, allowing accumulated gas to be smoothly expelled. This design avoids the discomfort symptoms such as abdominal distension and pain caused by traditional solid or closed-end anal tubes that obstruct air expulsion, thus maintaining the patient's normal intestinal physiological function. Even during the inflation and compression hemostasis process, the hollow structure retains the air-expelling pathway, ensuring that the patient does not experience pain due to gas retention during hemostasis treatment, improving treatment comfort and patient compliance, and demonstrating a high degree of adaptation between structural design and physiological needs.

[0018] Furthermore, after the combination structure of the ventilation tube and the balloon completes the compression hemostasis or anal dilation treatment, the balloon is deflated through the inflation head. After deflation, the balloon re-adheres to the ventilation tube, reducing the diameter of the entire cannula, making it easier to remove from the anal canal, reducing adhesion to the compression wound during the removal process, and avoiding secondary damage and bleeding.

[0019] Furthermore, the combined structure of the ventilation tube and the balloon is easily inserted into a narrowed anus when deflated, and continuous inflation allows for gradual dilation treatment of postoperative anal stenosis. In the deflated state, the balloon is small and fits tightly with the ventilation tube, its overall shape being slender and smooth, allowing it to pass smoothly through a narrowed anus caused by surgical trauma or inflammation, reducing resistance and the risk of mucosal damage during insertion. When gradual dilation is needed for postoperative anal stenosis, the balloon pressure can be slowly increased through the balloon inflation head, causing the balloon diameter to expand in a stepwise manner, generating a gentle dilation force on the narrowed anal canal wall. This gradual inflation dilation method avoids tearing caused by forced dilation in a single procedure. Through multiple, low-intensity compression-relaxation cycles, the normal diameter of the anal canal is gradually restored, achieving the dual purpose of anal dilation and hemostasis, thus expanding the application scenarios of the cannula in clinical practice.

[0020] This invention provides a multifunctional anal cannula for compression and hemostasis, which has the following beneficial effects: 1. This cannula achieves precise hemostasis through balloon compression, while the hollow design of the ventilator allows for continuous expulsion of gas from the anal canal during insertion, effectively relieving the patient's distending pain and discomfort caused by gas accumulation. In the deflated state, the balloon easily enters the contracted anus along with the cannula without increasing insertion resistance; after inflation, its diameter reaches over 3 cm and it takes on a dumbbell shape. The enlarged ends increase the contact area, firmly securing it within the anal canal and preventing it from slipping into or dislodging due to changes in body position or intestinal peristalsis. This ensures continuous and stable hemostatic pressure applied to the wound, improving the controllability and safety of clinical hemostasis.

[0021] The airbag features a tightly fitted design around the ventilation tube, eliminating the risk of loosening or detachment. This ensures consistent shape during inflation and compression, preventing uneven pressure or ineffectiveness due to airbag displacement. The gradually tapering profile, approximately 3 cm in diameter at the center and 4 cm at both ends after inflation, combined with the expansion of the inflated ends, concentrates pressure on the target area while distributing stress at the edges, reducing local tissue ischemia and damage. Combined with the pressure-maintaining and deflation adjustment functions of the inflation head, medical staff can flexibly control the pressure according to the wound condition, ensuring hemostasis while minimizing the possibility of excessive pressure leading to mucosal necrosis.

[0022] The ventilation tube is made of rigid plastic, approximately 1 cm in diameter and 7-8 cm in length, combining sufficient support strength with moderate flexibility. During insertion, it maintains its shape to prevent bending and ensures accurate balloon positioning. The open, hollow structure at both ends ensures that the airway function is unaffected by the balloon's state, making it particularly suitable for patients requiring simultaneous airway management after anorectal surgery. The tube is compact when deflated, adaptable to the anal anal structure of patients of different body types, reducing tissue traction pain during insertion and improving patient tolerance and ease of operation.

[0023] The dumbbell-shaped structure formed after the balloon is inflated significantly enhances fixation stability. The anchoring effect generated by the expansion at both ends effectively counteracts the displacement forces caused by physiological intestinal contractions and patient movements, avoiding the problem of frequent cannula slippage requiring repeated insertion and reducing secondary irritation to the patient's wound. Simultaneously, this structure allows the pressure distribution to better conform to the physiological curvature of the anal canal, reducing unnecessary compression of normal mucosa and sphincter muscles while ensuring sufficient hemostatic pressure. This is beneficial for the protection and recovery of postoperative anal function, and is particularly suitable for scenarios requiring long-term indwelling hemostasis.

[0024] This cannula serves a dual function of hemostasis and anal dilation. When deflated, it easily passes through a narrow anus, and when inflated, it allows for pressure hemostasis. In the treatment of postoperative anal stenosis, the anal canal can be gradually dilated through phased inflation and deflation. The progressive expansion of the balloon stimulates adaptive tissue growth, avoiding the mechanical damage associated with traditional anal dilators. The continuous air release function of the ventilation tube also helps maintain anal canal patency, reducing defecation difficulties and the risk of infection caused by stenosis. This multi-functional device reduces the complexity of operating multiple instruments, improving the overall efficiency of clinical treatment and the patient's recovery experience. Attached Figure Description

[0025] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0026] Figure 1This is a schematic diagram of the overall structure of the present invention. Figure 1 ; Figure 2 This is a schematic diagram of the overall structure of the present invention. Figure 2 ; Figure 3 This is a schematic diagram of the inflatable structure of the overall structure of the present invention; Figure 4 This is a schematic diagram of the air outlet structure of the overall structure of the present invention; Figure 5 This is a schematic cross-sectional view of the airbag inflation head of the present invention.

[0027] Part Name: 1. Ventilation tube; 2. Airbag; 3. Airbag inflation head. Detailed Implementation

[0028] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this disclosure. Rather, they are merely examples of apparatuses consistent with some aspects of this disclosure as detailed in the appended claims.

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0030] How to use: 1. Preparation before use: Confirm that all components of the multi-functional anal tube compression hemostasis cannula are intact, including the ventilation tube 1, the cuff 2, and the cuff inflation head 3. Check that the ventilation tube 1 is made of hollow rigid plastic (both ends are not sealed), that the cuff 2 fits tightly around the outside of the ventilation tube 1 (without loosening or falling off), and that the cuff inflation head 3 is connected to the inflation tube (3 to 4 cm in length) and is approximately 1.5 to 2 cm in size, located on the side of the cuff 2.

[0031] Inserting the cannula: Take the multi-functional anal tube in its uninflated state and apply pressure to stop the bleeding. Since the airbag 2 can be inserted into the anus along with the air tube 1 when it is not inflated, hold the outer end of the air tube 1 and gently insert the cannula into the anus to the target position (the length of the air tube 1 is adapted to the depth requirement of the anal tube). During this process, the hollow structure of the air tube 1 can continuously maintain the anal tube's air release function and avoid air release obstruction due to insertion.

[0032] Inflation Procedure: After positioning, inflate the balloon 2 using the balloon inflation head 3. During operation, connect a syringe (without the needle) to the balloon inflation head 3 and inflate the balloon 2 by pushing in air. Observe the compression during inflation. Stop inflation when the balloon 2 is inflated to a diameter exceeding 3 cm (ensuring effective compression of the bleeding site in the anal canal) and both ends have expanded into a dumbbell shape (enhancing stability and preventing the cannula from slipping into the rectum or outside the body). The inflation volume can be adjusted by aspirating or injecting air using the syringe to control the compression force and meet hemostasis requirements.

[0033] Maintenance of hemostasis by pressure: After inflation, remove the syringe and begin the pressure maintenance procedure to keep the balloon 2 inflated, continuously applying stable pressure to the bleeding site in the anal canal to achieve hemostasis. During this stage, the cannula remains stable due to its dumbbell-shaped structure, preventing slippage and ensuring effective hemostasis.

[0034] Special applications (e.g., postoperative anal dilation for anal stenosis): When used for gradual dilation of postoperative anal stenosis, initially keep balloon 2 uninflated (for easy passage through the narrowed anus); then slowly inflate balloon 2 through balloon inflation head 3, gradually expanding balloon 2 (increasing its diameter from the initial state to over 3 cm), using the expansion force of the inflated balloon to gently open the narrowed area; after maintaining the dilation operation, deflate balloon 2 through balloon inflation head 3 and then remove the cannula. The above process can be repeated according to the course of dilation treatment.

[0035] Removal of the cannula: After hemostasis or anal dilation is completed, use a syringe connected to the balloon inflation head 3 to aspirate air from the balloon 2, gradually reducing the balloon 2 to an uninflated state. Then, pull out the ventilation tube 1 and the balloon 2 together. During the removal process, the hollow structure of the ventilation tube 1 continuously assists in air removal, reducing discomfort.

[0036] Example: Example 1: Application of compression hemostasis for postoperative bleeding in the common anal canal Preoperative preparation: A multi-functional anal tube compression hemostasis cannula was selected. It was confirmed that the ventilation tube 1 was a rigid, hollow plastic structure with both ends not sealed. The balloon 2 was tightly fitted to the outer circumference of the ventilation tube 1 without loosening or falling off. The balloon inflation head 3 was located on the side of the balloon 2, and the connected inflation tube was of appropriate length for operation, with its own size for easy gripping. All components were checked for damage, ensuring that the balloon 2, when deflated, maintained its regular shape and could move synchronously with the ventilation tube 1.

[0037] Insertion procedure: The patient assumes a suitable position. The operator holds the outer end of the ventilation tube 1, applies paraffin oil to the outside of the non-inflated multi-functional anal tube hemostatic cannula, and gently inserts it into the anus. During the procedure, the hollow structure of the ventilation tube 1 maintains the anal tube's air release function to avoid discomfort caused by air retention. Insertion is stopped when the sensing cannula reaches near the bleeding site in the anal canal. At this point, the balloon 2 is not inflated and its small size allows it to pass smoothly through the contracted anal canal, reducing insertion resistance.

[0038] Inflation and Compression: After positioning, the operator connects the inflator head 3 to the syringe and slowly inflates the balloon 2. During inflation, the condition of the cannula is observed; the balloon 2 gradually expands, fitting tightly around the circumference of the ventilation tube 1, resulting in a uniform and stable expansion process. As inflation progresses, the diameter of the balloon 2 gradually increases until it effectively contacts the inner wall of the anal canal, creating circumferential compression on the bleeding site. Inflation continues until both ends of the balloon 2 naturally expand, forming a dumbbell shape. At this point, the cannula fits more tightly against the inner wall of the anal canal, ensuring that the point of compression covers the bleeding area while the expansion at both ends enhances fixation, preventing the cannula from penetrating deeper into the rectum or slipping outwards. During the procedure, the inflation volume is adjusted by aspiration or injection with the syringe to ensure moderate compression, effectively stopping bleeding while avoiding excessive compression that could cause tissue damage.

[0039] Pressure maintenance: After inflation is complete, remove the syringe from the balloon inflation head 3 to enter the pressure maintenance phase. During this process, the hollow structure of the ventilation tube 1 continuously performs its air release function, maintaining gas flow in the anal tube and reducing the patient's feeling of fullness. The operator should periodically observe the patient's response and bleeding. If bleeding has not completely stopped, a small amount of air can be added through the balloon inflation head 3; if the pressure is too tight, slight air release can be applied to adjust the pressure until bleeding is effectively controlled.

[0040] Removing the cannula: After confirming that the bleeding has stopped, the operator reconnects the balloon inflation head 3 with a syringe. By aspirating air from the balloon 2, the balloon 2 slowly deflates, gradually reducing its fit against the inner wall of the anal canal. Once the balloon 2 returns to its flat, uninflated state, it can be easily pulled out along with the ventilation tube 1. Throughout the removal process, the operator should remain gentle. The hollow structure of the ventilation tube 1 continues to assist in venting air, reducing irritation to the anal canal during removal and completing the hemostasis procedure.

[0041] Example 2: Application of stepwise anal dilation therapy in patients with postoperative anal stenosis Preoperative assessment and preparation: For patients with postoperative anal stenosis, a multifunctional anal tube compression hemostasis cannula is selected. It is crucial to confirm that the balloon 2, when de-inflated, can smoothly pass through the stenotic segment of the anal canal along with the ventilation tube 1, and that the balloon inflation head 3 is flexible and allows for phased control of the inflation volume. The treatment procedure is explained to the patient to alleviate anxiety, and the patient is placed in a lateral decubitus position to expose the anus.

[0042] Initial insertion: The operator holds the outer end of the ventilation tube 1 and slowly inserts the uninflated cannula into the anus. Because the balloon 2 is small when uninflated, it can conform to the shape of the narrowed anal canal. During the process, the hollow structure of the ventilation tube 1 continuously releases air, preventing distending pain caused by trapped air in the narrowed area. The insertion depth should be such that the tip of the cannula extends beyond the narrowed section; at this depth, the patient can tolerate it without significant severe pain.

[0043] Phase 1: Inflatable Anal Dilation. The operator begins initial inflation by connecting a syringe to the balloon inflation head 3 and injecting a small amount of gas to initially inflate the balloon 2. At this point, the diameter of the balloon 2 slightly increases, producing a gentle dilating force on the narrowed anal canal. The patient may feel a distending sensation within the anal canal but without stinging pain. This inflation state is maintained briefly to allow the narrowed tissue to adapt to the dilation force, while the ventilation tube 1 is used to maintain local ventilation and reduce discomfort. Subsequently, air is released through the balloon inflation head 3, causing the balloon 2 to retract, and the patient's response is observed.

[0044] Gradually increase the inflation volume: Repeat the inflation operation after a period of time, gradually increasing the inflation volume through the balloon inflation head 3 each time, so that the diameter of the balloon 2 is larger than the previous one. As inflation progresses, the expanding balloon 2 gradually increases its dilating force on the anal canal, slowly stretching the narrowed section, allowing the patient to gradually adapt to the larger space. Pause the inflation each time the balloon 2 reaches a dumbbell shape, using the expansion of the end of this shape to further stabilize the position of the cannula and prevent slippage that could affect the dilation effect. During this process, strictly adhere to the "small amounts, multiple times" principle, precisely controlling the inflation rhythm through the balloon inflation head 3 to ensure that the dilation force is gradual and to prevent tissue tearing.

[0045] Consolidation and Conclusion: After several stages of pneumatic dilation, the patient's anal canal stenosis improved, allowing for the smooth passage of a larger diameter cannula. During the final treatment, the balloon 2 was inflated to achieve the effective dilation diameter and maintained for a period to consolidate the dilation effect. Afterwards, air was released through the balloon inflation head 3, and the cannula was removed after the balloon 2 retracted. Air was continuously released from the ventilation tube 1 throughout the procedure to ensure comfortable operation, thus completing this anal dilation treatment.

[0046] Example 3: Application of Compression Hemostasis in Multiple Scenarios of Bleeding After Proctoscopy Scenario and Preparation: Slight bleeding from the anal canal was found after a proctoscopy. A multi-functional anal cannula was selected for compression hemostasis. The cannula's integrity was checked, confirming that the hollow structure of the ventilation tube 1 was patent, the balloon 2 was securely attached to the ventilation tube 1, and the balloon inflation head 3 was unobstructed, suitable for rapid bedside operation. The patient was placed in a knee-chest position or lateral decubitus position, with the anal sphincter relaxed.

[0047] Rapid insertion: The operator does not need complicated disinfection preparation (simplified according to clinical standards), but directly holds the outer end of the ventilation tube 1 and inserts the uninflated cannula along the natural direction of the anal canal. Because the balloon 2 is flat when uninflated, the insertion resistance is small, and it can quickly reach the vicinity of the bleeding point. The hollow structure of the ventilation tube 1 immediately activates the air release function to avoid the pressure caused by residual gas during the examination.

[0048] Precise inflation positioning: After insertion, the operator roughly determines the location of bleeding by observation (if auxiliary lighting is available), and then uses a syringe connected to the balloon inflation head 3 to inflate. During inflation, the balloon 2 is pushed in slowly, feeling the contact feedback of the balloon 2 against the anal canal. Inflation stops when the balloon 2 covers the bleeding area and forms a dumbbell shape—the expansion at both ends prevents cannula displacement and ensures the pressure point remains aligned with the bleeding site. If the bleeding area is extensive, the inflation volume can be finely adjusted using the balloon inflation head 3 to appropriately expand the pressure area of ​​the balloon 2. Simultaneously, air is released through the ventilation tube 1 to maintain local ventilation and reduce the feeling of pressure and distension caused by continuous compression in the patient.

[0049] Dynamic monitoring and adjustment: During compression, the operator should periodically inquire about the patient's feelings and observe for any fresh blood seepage. If bleeding persists, a small amount of air can be added through the cuff inflation head 3 to increase the compression force; if the patient complains of excessive pressure, slight deflation can be applied to reduce pressure, always adhering to the principle of "effective hemostasis and patient tolerance." The hollow structure of the ventilation tube 1 continues to function, preventing excessive pressure within the anal canal from causing discomfort and improving patient compliance.

[0050] Safe removal: After bleeding stops, first use a syringe connected to the balloon inflation head 3 to slowly aspirate and deflate the air. Once the balloon 2 has completely retracted to its uninflated state, gently pull out the cannula. When pulling out, keep the hollow structure of the ventilation tube 1 open to the outside to ensure smooth air release and avoid gas backflow that could irritate the anal canal upon removal. This facilitates convenient management of bleeding after the examination.

Claims

1. A multifunctional anal cannula for compression and hemostasis, comprising a ventilation tube (1), characterized in that: The outer layer of the ventilation tube (1) is provided with an airbag (2), and the side end of the airbag (2) is provided with an airbag inflation head (3).

2. The multifunctional anal cannula compression hemostasis cannula according to claim 1, characterized in that: The ventilation tube (1) is made of rigid plastic, with a diameter of about 1 cm and a length of 7 to 8 cm. Both ends are not sealed to maintain a hollow state.

3. The multifunctional anal cannula compression hemostasis cannula according to claim 1, characterized in that: The airbag (2) fits tightly against the outer circumference of the ventilation tube (1), with no loosening or falling off between them to ensure structural stability. The airbag (2) can be inserted into the anus along with the ventilation tube (1) when it is not inflated, and can achieve the function of compression hemostasis by inflating after inflation.

4. The multifunctional anal cannula compression hemostasis cannula according to claim 1, characterized in that: Before inflation, the airbag (2) fits tightly against the outer circumference of the air tube (1) to facilitate insertion into the anus; after inflation, the central diameter is about 3 cm, and the two ends expand to form a dumbbell-shaped structure to enhance the stability of the fixation.

5. A multifunctional anal cannula for compression and hemostasis according to claim 1, characterized in that: The overall length of the inflation tube connected to the airbag inflation head (3) is 3 to 4 cm, and the inflation head itself is about 1.5 to 2 cm in size. It is located on the side of the airbag and is directly used for the inflation and deflation operation control of the airbag.

6. The multifunctional anal cannula compression hemostasis cannula according to claim 1, characterized in that: The airbag inflation head (3) is located on the side of the airbag (2) and is used to control the inflation, pressure holding and deflation process of the airbag, thereby adjusting the pressure.

7. A multifunctional anal cannula compression hemostasis cannula according to claim 1, characterized in that: The airbag (2) can reach a diameter of more than 3 cm after inflation, so as to ensure effective compression of the bleeding site of the anal canal.

8. A multifunctional anal cannula for compression and hemostasis according to claim 1, characterized in that: The two ends of the air bladder (2) expand after inflation, making the entire cannula present a dumbbell shape, thereby ensuring that the entire cannula will not slip out into the rectum or outside the body during continuous inflation and compression hemostasis.

9. A multifunctional anal cannula for compression and hemostasis according to claim 1, characterized in that: The hollow structure of the ventilator (1) allows the anal tube to maintain its air-venting function during insertion.

10. A multifunctional anal cannula compression hemostasis cannula according to claim 1, characterized in that: The combination of the ventilation tube (1) and the air bag (2) is easy to insert into a narrow anus when not inflated, and can be used for progressive anal dilation treatment of postoperative anal stenosis by continuous inflation.

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