Disposable leak-proof transanal enema contrast injection catheter
By designing a combination of an internally threaded sleeve, an elastic anti-leakage valve component, and a medical wax ring, the problem of sealing the gap between the catheter and the anus was solved, achieving effective sealing of the contrast fluid and ensuring the quality of contrast imaging and treatment efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- PEOPLES HOSPITAL AFFILIATED TO FUJIAN UNIV OF TRADITIONAL CHINESE MEDICINE (FUJIAN PROVINCIAL PEOPLES HOSPITAL)
- Filing Date
- 2025-03-31
- Publication Date
- 2026-07-31
AI Technical Summary
Existing contrast injection catheters cannot effectively seal the gap between the anus and the catheter in patients with loose anus after low rectal cancer surgery, leading to contrast fluid loss, environmental pollution, and reduced treatment efficiency.
A disposable, leak-proof transanal enema contrast injection catheter was designed. The leak-proof structure consists of an internally threaded sleeve and an elastic leak-proof valve component. Combined with a medical wax ring and an adjusting cylinder, the expansion and contraction of the elastic leak-proof valve component achieves a seal between the anus and the catheter, preventing the contrast fluid from flowing back.
This effectively prevents contrast fluid from leaking out of the anus, ensuring the quality of the contrast imaging, reducing environmental pollution, and improving treatment efficiency.
Smart Images
Figure CN224573075U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of medical device technology, specifically a disposable leak-proof transanal enema contrast injection catheter. Background Technology
[0002] Currently, the main principle of medical imaging is to ingest substances containing elements with high atomic numbers and then take radiographic images of the body parts to be diagnosed, thereby improving the accuracy of diagnosis while reducing the difficulty of diagnosis and treatment for doctors.
[0003] Contrast imaging is a commonly used medical aid with a wide range of applications, such as upper gastrointestinal contrast imaging and colonography. However, the applicant has found in practice that existing contrast injection catheters, when used for contrast imaging in patients with low rectal cancer who have experienced postoperative anal laxity, cannot actively close the gap between the anus and the catheter. This leads to excessive leakage of contrast fluid from the patient, contaminating the treatment environment and causing contrast failure, thus delaying treatment efficiency. Therefore, in response to the problems of the existing technology, this application will provide a disposable leak-proof transanal enema contrast injection catheter to solve the problem. Utility Model Content
[0004] To address the shortcomings of existing technologies, this invention provides a disposable, leak-proof transanal enema contrast injection catheter, which solves the problems mentioned in the background section.
[0005] This utility model provides the following technical solution: a disposable leak-proof transanal enema contrast injection catheter, comprising a catheter body and a syringe. The top of the catheter body is fitted with a transition syringe that can engage with the bottom port of the syringe. The bottom side wall of the catheter body has an outlet hole for contrast fluid output, and the bottom surface of the catheter body has an external thread. An internal thread sleeve and an elastic leak-proof valve component are fitted on the outside of the catheter body. The bottom of the internal thread sleeve is connected to the top of the elastic leak-proof valve component. The inner side of the internal thread sleeve is locked with the external thread and the external thread is used as support to drive the elastic leak-proof valve component to be raised and lowered on the outside of the catheter body.
[0006] Preferably, a linkage belt is installed between the top surface of the transition syringe and the top surface of the catheter body. The linkage belt enables the transition syringe and the catheter body to be connected as a whole. The transition syringe is snapped into the top inner side of the catheter body. The transition syringe replaces the existing metal needle and avoids puncture.
[0007] The catheter body, the linkage belt, the internal threaded sleeve, and the elastic anti-leakage valve are all made of medical-grade silicone material, and the bottom end of the catheter body has a hemispherical structure for easy insertion.
[0008] Preferably, a medical wax ring is movably sleeved on the outer side of the catheter body, and the medical wax ring is fitted on the bottom inner side of the elastic anti-leak valve component, which can adjust the bottom port structure of the elastic anti-leak valve component to a state of contraction towards the surface of the catheter body, thereby ensuring that the elastic anti-leak valve component can be smoothly inserted into the patient's rectum.
[0009] The selected medical wax ring is made of PLGA material that can be absorbed by the human body and can melt under the heating of the body temperature. After the elastic anti-leak valve component is smoothly inserted into the patient's rectum, the medical wax ring can melt under the heating of the patient's body temperature, eliminating the limiting and containing effect on the elastic anti-leak valve component, while allowing the elastic anti-leak valve component to expand in the rectum to block the backflow of contrast fluid, preventing the contrast fluid from flowing out of the patient's anus. At the same time, the medical wax ring made of PLGA material can be absorbed by the human body, ensuring the quality of the contrast imaging.
[0010] Specifically, the catheter body is fitted with an adjusting cylinder on its outer side. The bottom inner side of the adjusting cylinder has a receiving groove that can accommodate the internal threaded sleeve and the elastic anti-leakage valve component. The adjusting cylinder can assist in the storage of the internal threaded sleeve and the elastic anti-leakage valve component, thereby facilitating the movement of the internal threaded sleeve and the elastic anti-leakage valve component into the patient's rectum, reducing movement resistance. After the elastic anti-leakage valve component enters the patient's rectum, the movement and reset of the adjusting cylinder can ensure that the elastic anti-leakage valve component expands in the rectum to block the backflow of contrast fluid and prevent the contrast fluid from flowing out of the patient's anus.
[0011] Preferably, the top surface of the adjusting cylinder is equipped with several pressing protrusions along its circumference, thereby providing convenient conditions for applying force. The pressing protrusions are made of the same material as the adjusting cylinder and are all made of medical-grade silicone, thereby ensuring the comfort of pressing.
[0012] Compared with the prior art, the present invention has the following beneficial effects:
[0013] 1. This utility model uses an internally threaded sleeve and an elastic anti-leakage valve to form an anti-leakage structure. After being used with the catheter body, the elastic anti-leakage valve can expand on its own after being inserted into the patient's anus simultaneously with the catheter body, thereby blocking and sealing the connection gap between the catheter body and the anus. This prevents the contrast agent delivered to the patient's rectum through the catheter body from flowing back out of the patient's anus, ensuring the quality of subsequent contrast imaging.
[0014] 2. This utility model uses a medical wax ring to assist the use of an elastic anti-leakage valve component, allowing the elastic anti-leakage valve component to be smoothly inserted into the patient's anus in a relatively contracted state along with the catheter body. Then, as the medical wax ring is dissolved by the body temperature, the elastic anti-leakage valve component will expand on its own, thereby blocking and sealing the connection gap between the catheter body and the anus. This prevents the contrast agent subsequently delivered to the patient's rectum through the catheter body from flowing back out of the patient's anus, ensuring the quality of subsequent contrast imaging.
[0015] 3. This utility model uses an adjustable cylinder to actively assist in the retraction of the elastic anti-leakage valve component and the internal threaded sleeve. This allows the elastic anti-leakage valve component and the internal threaded sleeve to remain in a contracted state and smoothly enter the anus even after the catheter body has traveled a long distance into the patient's rectum. Then, as the adjustable cylinder moves and resets, the elastic anti-leakage valve component will expand on its own, thereby blocking and sealing the connection gap between the catheter body and the anus. This prevents the contrast agent subsequently delivered to the patient's rectum through the catheter body from flowing back out of the patient's anus, ensuring the quality of subsequent imaging. Attached Figure Description
[0016] Figure 1 This is a front view schematic diagram of the first embodiment of the structure of this utility model;
[0017] Figure 2 This is a cross-sectional schematic diagram of the first embodiment of the present utility model;
[0018] Figure 3 This is a front view schematic diagram of the second embodiment of the structure of this utility model;
[0019] Figure 4 This is a cross-sectional schematic diagram of the second embodiment of the present utility model;
[0020] Figure 5 This is a front view schematic diagram of the third embodiment of the structure of this utility model;
[0021] Figure 6 This is a cross-sectional schematic diagram of the third embodiment of the present utility model;
[0022] Figure 7 The structure of this utility model Figure 6 Enlarged diagram of point A in the middle.
[0023] In the diagram: 1. Catheter body; 2. Syringe; 3. Transition syringe; 4. Discharge port; 5. Internal threaded sleeve; 6. Elastic anti-leak valve component; 7. Linkage belt; 8. Medical wax ring; 9. Adjustment cylinder. Detailed Implementation
[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0025] Example 1
[0026] Please see Figure 1-2 A disposable, leak-proof transanal enema contrast injection catheter includes a catheter body 1 and a syringe 2. The top of the catheter body 1 is fitted with a transition syringe 3 that can be engaged with the bottom port of the syringe 2. The bottom side wall of the catheter body 1 has an outlet hole 4 for contrast fluid output, and the bottom surface of the catheter body 1 has an external thread. The outside of the catheter body 1 is fitted with an internal thread sleeve 5 and an elastic leak-proof valve component 6. The bottom of the internal thread sleeve 5 is connected to the top of the elastic leak-proof valve component 6. The inner side of the internal thread sleeve 5 is locked with the external thread and the external thread is used as support to drive the elastic leak-proof valve component 6 to be raised and lowered on the outside of the catheter body 1.
[0027] A linkage belt 7 is installed between the top surface of the transition syringe 3 and the top surface of the catheter body 1. The linkage belt 7 is used to connect the transition syringe 3 and the catheter body 1 in one piece. The transition syringe 3 is snapped into the top inner side of the catheter body 1. The transition syringe 3 replaces the existing metal needle to avoid puncture. The materials used to make the catheter body 1, the linkage belt 7, the internal thread sleeve 5, and the elastic anti-leakage valve component 6 are all made of medical silicone. The bottom end of the catheter body 1 has a hemispherical structure to facilitate subsequent insertion.
[0028] Specific implementation of this embodiment:
[0029] When the postoperative incision of the rectum is close to the patient's anus, the internal thread sleeve 5 can be turned to move the elastic anti-leakage valve component 6 a suitable distance closer to the bottom end of the catheter body 1. Then, manually hold and squeeze the elastic anti-leakage valve component 6 to make the open port of the elastic anti-leakage valve component 6 close to the bottom end surface of the catheter body 1 and contract. Then, insert the hemispherical end of the catheter body 1, the contracted elastic anti-leakage valve component 6, and the medical wax ring 8 into the patient's anus simultaneously until the elastic anti-leakage valve component 6 is completely submerged in the patient's anus.
[0030] When the elastic anti-leakage valve component 6 is completely inserted into the patient's anus, the elastic anti-leakage valve component 6 will lose the external active pressure and expand on its own, thereby blocking and sealing the anus and the tube body 1.
[0031] After the catheter body 1 and the elastic anti-leakage valve component 6 are installed stably, the transition syringe 3 is snapped into the inside of the other end of the catheter body 1. Then, the syringe 2 containing the specified amount of contrast fluid is connected to the transition syringe 3. After completion, the contrast fluid is injected into the patient's rectum through the transition syringe 3 and the catheter body 1 using the syringe 2, and directly into the area where the wound is located, so as to provide auxiliary treatment conditions for subsequent contrast imaging.
[0032] Example 2
[0033] Please see Figure 3-4 A disposable, leak-proof transanal enema contrast injection catheter includes a catheter body 1 and a syringe 2. The top of the catheter body 1 is fitted with a transition syringe 3 that can be engaged with the bottom port of the syringe 2. The bottom side wall of the catheter body 1 has an outlet hole 4 for contrast fluid output, and the bottom surface of the catheter body 1 has an external thread. The outside of the catheter body 1 is fitted with an internal thread sleeve 5 and an elastic leak-proof valve component 6. The bottom of the internal thread sleeve 5 is connected to the top of the elastic leak-proof valve component 6. The inner side of the internal thread sleeve 5 is locked with the external thread and the external thread is used as support to drive the elastic leak-proof valve component 6 to be raised and lowered on the outside of the catheter body 1.
[0034] A medical wax ring 8 is movably sleeved on the outer side of the catheter body 1. The medical wax ring 8 is fitted inside the bottom of the elastic anti-leakage valve component 6 and can adjust the bottom port structure of the elastic anti-leakage valve component 6 to a state of contraction towards the surface of the catheter body 1. This ensures that the elastic anti-leakage valve component 6 can be smoothly inserted into the patient's rectum. The medical wax ring 8 can melt under the heating of the human body temperature. It is made of PLGA material that can be absorbed by the human body. After the elastic anti-leakage valve component 6 is smoothly inserted into the patient's rectum, the medical wax ring 8 can melt under the heating of the patient's body temperature, eliminating the limiting and retracting effect on the elastic anti-leakage valve component 6. At the same time, the elastic anti-leakage valve component 6 expands in the rectum to block the backflow of contrast fluid and prevent the contrast fluid from flowing out of the patient's anus. Meanwhile, the medical wax ring 8 made of PLGA material can be absorbed by the human body to ensure the quality of the contrast imaging.
[0035] Specific implementation of this embodiment:
[0036] When the incision after rectal surgery is at a medium distance from the patient's anus, the internal threaded sleeve 5 can be turned to move the elastic anti-leakage valve component 6 and the medical wax ring 8 a suitable distance on the catheter body 1. Then, the hemispherical end of the catheter body 1, along with the contracted elastic anti-leakage valve component 6 and the medical wax ring 8, are simultaneously inserted into the patient's anus until the elastic anti-leakage valve component 6 is completely submerged inside the patient's anus.
[0037] When the elastic anti-leak valve component 6 and the medical wax ring 8 are completely inserted into the patient's anus, the medical wax ring 8 will gradually melt as the body temperature heats up, thereby releasing the restriction on the elastic anti-leak valve component 6, allowing the elastic anti-leak valve component 6 to expand on its own, and then covering and sealing the anus and the tube body 1.
[0038] After the catheter body 1 and the elastic anti-leakage valve component 6 are installed stably, the transition syringe 3 is snapped into the inside of the other end of the catheter body 1. Then, the syringe 2 containing the specified amount of contrast fluid is connected to the transition syringe 3. After completion, the contrast fluid is injected into the patient's rectum through the transition syringe 3 and the catheter body 1 using the syringe 2, and directly into the area where the wound is located, so as to provide auxiliary treatment conditions for subsequent contrast imaging.
[0039] Example 3
[0040] Please see Figure 5-7 A disposable, leak-proof transanal enema contrast injection catheter includes a catheter body 1 and a syringe 2. The top of the catheter body 1 is fitted with a transition syringe 3 that can be engaged with the bottom port of the syringe 2. The bottom side wall of the catheter body 1 has an outlet hole 4 for contrast fluid output, and the bottom surface of the catheter body 1 has an external thread. The outside of the catheter body 1 is fitted with an internal thread sleeve 5 and an elastic leak-proof valve component 6. The bottom of the internal thread sleeve 5 is connected to the top of the elastic leak-proof valve component 6. The inner side of the internal thread sleeve 5 is locked with the external thread and the external thread is used as support to drive the elastic leak-proof valve component 6 to be raised and lowered on the outside of the catheter body 1.
[0041] An adjusting cylinder 9 is snapped onto the outer side of the catheter body 1. The bottom inner side of the adjusting cylinder 9 is provided with a receiving ring groove that can be fitted with the internal threaded sleeve 5 and the elastic anti-leakage valve component 6. The adjusting cylinder 9 can assist in receiving the internal threaded sleeve 5 and the elastic anti-leakage valve component 6, thereby facilitating the movement of the internal threaded sleeve 5 and the elastic anti-leakage valve component 6 into the patient's rectum, reducing movement resistance. After the elastic anti-leakage valve component 6 enters the patient's rectum, the movement and reset of the adjusting cylinder 9 can ensure that the elastic anti-leakage valve component 6 expands in the rectum to block the backflow of contrast fluid and prevent the contrast fluid from flowing out of the patient's anus.
[0042] The top surface of the adjusting cylinder 9 is equipped with several pressing protrusions along its circumference, thereby providing convenient conditions for applying force. The pressing protrusions are made of the same material as the adjusting cylinder 9 and are all made of medical-grade silicone, thereby ensuring the comfort of pressing.
[0043] Specific implementation of this embodiment:
[0044] When the surgical incision after rectal surgery is at a long distance from the patient's anus, the internal threaded sleeve 5 can be turned to move the elastic anti-leakage valve component 6 on the catheter body 1 a suitable distance. Then, the adjusting cylinder 9 is pushed and the receiving ring groove inside the adjusting cylinder 9 is fitted with the internal threaded sleeve 5 and the elastic anti-leakage valve component 6. The elastic anti-leakage valve component 6 is then received and compressed. After completion, the hemispherical end of the catheter body 1, the contracted elastic anti-leakage valve component 6, and the adjusting cylinder 9 are simultaneously inserted into the patient's anus until the elastic anti-leakage valve component 6 is completely submerged in the patient's anus.
[0045] Once the elastic anti-leak valve component 6 is fully inserted into the patient's anus, the repositioning adjustment cylinder 9 is withdrawn, thereby releasing the restriction on the elastic anti-leak valve component 6 and allowing it to expand on its own, thus shielding and sealing the anus and the catheter body 1.
[0046] After the catheter body 1 and the elastic anti-leakage valve component 6 are installed stably, the transition syringe 3 is snapped into the inside of the other end of the catheter body 1. Then, the syringe 2 containing the specified amount of contrast fluid is connected to the transition syringe 3. After completion, the contrast fluid is injected into the patient's rectum through the transition syringe 3 and the catheter body 1 using the syringe 2, and directly into the area where the wound is located, so as to provide auxiliary treatment conditions for subsequent contrast imaging.
[0047] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Additionally, in the accompanying drawings of this utility model, the fill patterns are merely for distinguishing layers and do not constitute any other limitation.
[0048] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A disposable, leak-proof transanal enema contrast injection catheter, comprising a catheter body (1) and a syringe (2), characterized in that: The top of the catheter body (1) is fitted with a transition syringe (3) that can engage with the bottom port of the syringe (2). The bottom side wall of the catheter body (1) is provided with an outlet hole (4) for the output of contrast fluid. The bottom surface of the catheter body (1) is provided with an external thread. The outer side of the catheter body (1) is fitted with an internal thread sleeve (5) and an elastic anti-leak valve component (6). The bottom of the internal thread sleeve (5) is connected to the top of the elastic anti-leak valve component (6). The inner side of the internal thread sleeve (5) is locked with the external thread spiral and the external thread is used as support to drive the elastic anti-leak valve component (6) to be raised and lowered on the outer side of the catheter body (1).
2. The disposable leak-proof transanal enema contrast injection catheter according to claim 1, characterized in that: A linkage belt (7) is installed between the top surface of the transition syringe (3) and the top surface of the catheter body (1), and the transition syringe (3) is snapped into the top inner side of the catheter body (1).
3. The disposable leak-proof transanal enema contrast injection catheter according to claim 1, characterized in that: The materials used to make the catheter body (1), the linkage belt (7), the internal threaded sleeve (5), and the elastic anti-leakage valve component (6) are all medical silicone materials, and the bottom end of the catheter body (1) is a hemispherical structure.
4. The disposable leak-proof transanal enema contrast injection catheter according to claim 1, characterized in that: A medical wax ring (8) is movably sleeved on the outside of the catheter body (1), and the medical wax ring (8) is fitted on the bottom inner side of the elastic anti-leak valve component (6) and can adjust the bottom port structure of the elastic anti-leak valve component (6) to a state of contraction towards the surface of the catheter body (1).
5. The disposable leak-proof transanal enema contrast injection catheter according to claim 4, characterized in that: The medical wax ring (8) can melt under human body temperature and is made of PLGA material that can be absorbed by the human body.
6. The disposable leak-proof transanal enema contrast injection catheter according to claim 1, characterized in that: An adjusting cylinder (9) is snapped onto the outside of the catheter body (1). The bottom inner side of the adjusting cylinder (9) is provided with a receiving ring groove that can be fitted with the internal threaded sleeve (5) and the elastic anti-leakage valve component (6).
7. The disposable leak-proof transanal enema contrast injection catheter according to claim 6, characterized in that: The top surface of the regulating cylinder (9) is provided with several pressing protrusions along its circumference, and the material of the pressing protrusions is the same as that of the regulating cylinder (9) and they are all made of medical silicone material.