Degradable magnesium alloy fallopian tube cavity stent
By designing a degradable magnesium alloy fallopian tube lumen support, using drug push piston and drug discharge hole to achieve uniform filling and discharge of drugs, and controlling the degradation of magnesium alloy support frame through the outer fiber membrane and the inner fiber membrane, the existing technology is solved The uneven application of drugs and the need for reoperation of the stent to be removed improves treatment efficiency and safety.
Patent Information
- Application Number
- CN202420077626.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-11
- Publication Date
- 2024-12-13
- Estimated Expiration
- 2034-01-11
AI Technical Summary
Existing fallopian tube stents are difficult to apply auxiliary drugs evenly during the surgery, and the stent needs to be removed again, increasing the risk of the patient.
A degradable magnesium alloy fallopian tube lumen stent is designed, including a round tubular catheter, an expansion airbag, a support frame and a drug push piston. The drug push piston and drug drain hole are uniformly filled and discharged, and through the outer fiber membrane. The inner fiber membrane wraps the magnesium alloy support frame to control its degradation rate and avoid reoperation.
The uniform filling and effective discharge of drugs are achieved, reducing surgical risks, and re-operative removal is avoided through the degradation of the magnesium alloy support frame, reducing the risk and cost of patients.
Smart Images
Figure CN222150236U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of medical materials, in particular to a degradable magnesium alloy fallopian tube cavity stent. Background Art
[0002] The fallopian tube is a part of the female internal reproductive organs. It looks like a pair of slender and curved tubes located on the upper edge of the broad ligament of the uterus. The inner side is connected to the uterine horn, and the outer end is free and close to the ovary. The total length is 8-15cm. According to its structure and function, it is divided into four parts from the outside to the inside, namely the fallopian tube infundibulum, the fallopian tube ampulla, the fallopian tube isthmus and the uterus. The fallopian tube isthmus is thin and straight, and the fallopian tube stenosis leads to infertility.
[0003] Chinese patent application number CN2021103060663 discloses a fallopian tube stent, including an elastic hollow tube body, the elastic hollow tube body including a straight tube section, a first curled section arranged at the head end of the straight tube section, and a second curled section arranged at the tail end of the straight tube section. The device can support and drain the fallopian tube, reduce postoperative adhesion and obstruction, and improve the success rate of the operation.
[0004] The above solution may encounter the following problems during use:
[0005] 1. When clearing the narrow or adhesion parts of the fallopian tube, auxiliary drugs are used to improve the treatment effect. In the above scheme, the auxiliary drugs cannot be evenly applied to the cleared part of the fallopian tube during the operation.
[0006] 2. After the above scheme clears the fallopian tubes, the patient needs to undergo surgery again to remove the clearing device after recovery from treatment, which requires the patient to undergo surgery again, increasing the risk. Utility Model Content
[0007] The utility model aims to provide a degradable magnesium alloy fallopian tube cavity stent, which solves the above-mentioned problems in the prior art.
[0008] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a degradable magnesium alloy fallopian tube cavity stent, comprising a circular tubular catheter, the outer wall of the catheter is provided with an expansion balloon, the outer wall of the expansion balloon is provided with a circular tubular support frame, the upper end of the catheter is detachably connected with an expansion head, the support frame comprises an outer fiber membrane, a magnesium alloy support frame and an inner fiber membrane, the outer fiber membrane is sleeved on the outer wall of the magnesium alloy support frame, the inner fiber membrane is sleeved on the inner wall of the magnesium alloy support frame, the inner wall of the inner fiber membrane is sleeved on the outer wall of the expansion balloon, the magnesium alloy support frame comprises a plurality of corrugated rings evenly distributed from top to bottom, and connecting rods are fixed between the corrugated rings;
[0009] A medicine pushing piston is slidably connected inside the catheter, a plurality of inflation holes are opened along the circumference of the inner wall of the catheter, a plurality of medicine discharge holes are opened along the circumference of the inner wall of the expansion head, and the medicine discharge holes are communicated with the catheter.
[0010] Preferably, the length of the medicine pushing piston is smaller than the distance from the inflation hole to the medicine discharging hole.
[0011] Preferably, the outer fiber membrane and the inner fiber membrane are both woven from polyester materials, and the outer fiber membrane and the inner fiber membrane completely wrap the magnesium alloy support frame.
[0012] Preferably, the expansion head is conical and smaller at the top and larger at the bottom.
[0013] Preferably, the expansion balloon is fixed to the outer wall of the catheter, and the expansion balloon covers the inflation hole inside thereof.
[0014] Preferably, the expansion amount of the expansion balloon at each cross section along the axial direction of the catheter is the same.
[0015] Preferably, the connecting rods fixed between the plurality of corrugated rings are staggered and fixed to each other.
[0016] Compared with the prior art, the beneficial effects of the utility model are as follows:
[0017] 1. By setting a slidingly connected medicine pushing piston inside the catheter, it is beneficial to fill the auxiliary medicine at the upper end of the catheter and discharge the medicine through the medicine discharge hole, which can better treat the patient. The length of the medicine pushing piston is set to be smaller than the distance from the inflation hole to the medicine discharge hole, which is beneficial to discharge all the medicine filled at the upper end of the catheter from the medicine discharge hole.
[0018] 2. By setting an inner fiber membrane on the inner wall of the magnesium alloy support frame and an outer fiber membrane on the outer wall of the magnesium alloy support frame, the degradation rate of the magnesium alloy support frame can be slowed down. At the same time, by changing the thickness of the outer fiber membrane and the inner fiber membrane, the degradation time of the magnesium alloy support frame can be changed, which is beneficial to change the degradation rate of the magnesium alloy support frame according to the different conditions of the patients, and the support frame can be more closely fitted to the patient's fallopian tube cavity through the outer fiber membrane. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 This is a schematic diagram of the overall structure of the utility model after expansion;
[0020] Figure 2 It is a partial cross-sectional schematic diagram of the utility model after expansion;
[0021] Figure 3 This is an overall schematic diagram of the magnesium alloy support frame of the utility model;
[0022] Figure 4It is an overall cross-sectional schematic diagram of the utility model;
[0023] Figure 5 It is a schematic diagram of the catheter contraction of the utility model;
[0024] Figure 6 It is a partial cross-sectional schematic diagram of the support frame of the utility model.
[0025] Explanations in the figure: 1. Support frame; 2. Expansion head; 3. Catheter; 4. Inflatable airbag; 101. Outer fiber membrane; 102. Magnesium alloy support frame; 103. Inner fiber membrane; 201. Drug discharge hole; 301. Drug pushing piston; 302. Inflation hole; 1021. Corrugated ring; 1022. Connecting rod. DETAILED DESCRIPTION
[0026] The following is a further detailed description of the implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.
[0027] In the description of the present invention, unless otherwise specified, "multiple" means two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third" and the like are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.
[0028] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0029] See also Figure 1 , Figure 2 , Figure 4 and Figure 5A degradable magnesium alloy fallopian tube cavity stent comprises a circular tube-shaped catheter 3, the outer wall of the catheter 3 is provided with an expansion balloon 4, the expansion amount of each cross section of the expansion balloon 4 along the axial direction of the catheter 3 is the same, after the gas is introduced into the catheter 3, the gas can be injected into the interior of the expansion balloon 4 through the inflation hole 302, so that the expansion balloon 4 is expanded, and the expansion of the expansion balloon 4 expands the support frame 1, and at the same time expands the patient's fallopian tube cavity, so that the expansion balloon 4 forms a supporting effect on the fallopian tube cavity, and at the same time, the expansion amount of each cross section of the expansion balloon 4 along the axial direction of the catheter 3 is the same, so that The expansion size of each part of the support frame 1 is consistent, the upper end of the catheter 3 is detachably connected with an expansion head 2, the expansion head 2 is conical and small at the top and large at the bottom, the expansion head 2 and the catheter 3 are detachably connected, it is convenient to remove the expansion head 2 from the catheter 3 for replacement, when the device part is damaged, only the corresponding part needs to be replaced, which reduces the cost, the expansion head 2 is set to a conical shape and small at the top and large at the bottom, it is convenient to dredge and expand the blocked fallopian tube cavity of the patient, so that the fallopian tube cavity is unobstructed, the inner wall of the expansion head 2 is provided with a plurality of drug discharge holes 201 along its circumference, and the drug discharge holes 201 are connected to the catheter 3. The catheter 3 is connected to the patient's body through the medicine discharge hole 201, and the auxiliary medicine is filled at the upper end of the catheter 3. The medicine is discharged to the patient's treatment position through the medicine discharge hole 201, so that the treatment effect is optimal. The inside of the catheter 3 is slidably connected with a medicine pushing piston 301. The inner wall of the catheter 3 is provided with a plurality of gas-filling holes 302 along its circumference. The length of the medicine pushing piston 301 is less than the distance from the gas-filling hole 302 to the medicine discharge hole 201. When gas is filled in the catheter 3, the gas pushes the medicine pushing piston 301 to move, and the medicine pushing piston 301 moves against the medicine at the upper end of the catheter 3, and the medicine is discharged from the medicine discharge hole 201 until the medicine is exhausted. At this time, the medicine pushing piston 301 The lower end is no longer in contact with the inflation hole 302, and the gas in the catheter 3 enters the expansion airbag 4 to expand the expansion airbag 4. The length of the medicine pushing piston 301 is set to be smaller than the distance from the inflation hole 302 to the medicine discharge hole 201, so as to ensure that the expansion airbag 4 can be inflated to expand it when the medicine in the catheter 3 is exhausted. The expansion airbag 4 is fixed to the outer wall of the catheter 3, and the expansion airbag 4 covers the inflation hole 302 inside it. The expansion airbag 4 wraps the inflation hole 302 therein, so that the gas filled in the catheter 3 enters the expansion airbag 4 through the inflation hole 302, which is used for the expansion airbag 4 to expand.
[0030] See also Figure 2 , Figure 3 , Figure 4 and Figure 6The outer wall of the expansion balloon 4 is provided with a tubular support frame 1, and the support frame 1 is used to support the patient's fallopian tube cavity to prevent the fallopian tube from adhering again after dredging. The support frame 1 includes an outer fiber membrane 101, a magnesium alloy support frame 102 and an inner fiber membrane 103. The outer fiber membrane 101 is sleeved on the outer wall of the magnesium alloy support frame 102, and the inner fiber membrane 103 is sleeved on the inner wall of the magnesium alloy support frame 102. The inner wall of the inner fiber membrane 103 is sleeved on the outer wall of the expansion balloon 4. The magnesium alloy support frame 102 includes a plurality of corrugated rings 1021 evenly distributed from top to bottom, and connecting rods 1022 are fixed between the corrugated rings 1021. The outer fiber membrane 101 and the inner fiber membrane 103 are woven from polyester materials. The outer fiber membrane 101 and the inner fiber membrane 103 completely wrap the magnesium alloy support frame 102, and the outer fiber membrane 101 and the inner fiber membrane 103 completely wrap the magnesium alloy support frame 102. The inner fiber membrane 103 wraps the magnesium alloy support frame 102 to prevent the magnesium alloy support frame 102 from rapidly degrading in the patient's body. When the magnesium alloy support frame 102 rapidly degrades, gas will appear. When the gas does not have time to diffuse and absorb, bubbles will form around the implant, which will affect the physiological function of the tissue around the implant and the recovery treatment of the implant site to a certain extent. The outer fiber membrane 101 and the inner fiber membrane 103 are melt-spun and then woven using polyester materials. The thickness of the outer fiber membrane 101 and the inner fiber membrane 103 is different, and the degradation rate of the magnesium alloy support frame 102 is also different, so that the degradation rate of the magnesium alloy support frame 102 can be changed according to the patient's condition. At the same time, the outer fiber membrane 101 and the inner fiber membrane 103 made of polyester materials can also be degraded in the body, so that the support frame 1 as a whole can be degraded in the body, and there is no need for another surgery to remove the support frame 1.
[0031] When the utility model is used:
[0032] First, the patient's condition, medication dosage and treatment duration are determined through examinations with other equipment, and after completion, the corresponding support frame 1 is selected. The time required for the support frame 1 to be completely degraded is consistent with the treatment duration;
[0033] Then, the auxiliary drug is filled into the interior of the upper end of the catheter 3, and the expansion head 2 is fixed to the upper end of the catheter 3. After completion, the support frame 1 is sleeved on the outer wall of the expansion balloon 4. At this time, the corrugated magnesium alloy support frame 102 is in a tightened state, that is, the crests of the corrugated magnesium alloy support frame 102 are attached to each other, and the catheter 3 with the expansion head 2 is extended into the patient's fallopian tube cavity;
[0034] Next, the expansion head 2 enters the blocked part of the fallopian tube and moves slowly, and at the same time, the catheter 3 starts to slowly introduce gas, and the expansion head 2 slowly dredges the blocked fallopian tube of the patient, and at the same time, the gas in the catheter 3 pushes the medicine pushing piston 301 to move, and the medicine pushing piston 301 pushes the auxiliary medicine inside the catheter 3 to move and be discharged from the medicine discharge hole 201 of the expansion head 2, and released to the unblocked part of the fallopian tube. After the expansion head 2 completely dredges the blocked fallopian tube, the medicine pushing piston 301 also completely squeezes out the medicine, and the movement of the catheter 3 is stopped, and the gas is continuously filled into the inside of the catheter 3;
[0035] Finally, the gas filled from the catheter 3 enters the expansion balloon 4 through the inflation hole 302, causing the expansion balloon 4 to expand. The expansion of the expansion balloon 4 causes the support frame 1 to expand, so that the support frame 1 forms a supporting effect on the expanded fallopian tube cavity to prevent the fallopian tube from adhering again. At this time, the corrugated magnesium alloy support frame 102 opens, that is, the wave crests of the corrugated support frame 1 are away from each other, and the expansion amounts of the expansion balloon 4 at various cross-sections along the axial direction of the catheter 3 are the same, so that the expansion sizes of the support frame 1 are consistent at various locations. After completion, the gas in the expansion balloon 4 is extracted through the inflation hole 302 and the catheter 3, the expansion balloon 4 shrinks and separates from the support frame 1, and the catheter 3 is taken out. During the treatment process, the support frame 1 will slowly degrade in the body, and the support frame 1 will be completely degraded after the treatment is completed.
[0036] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A degradable magnesium alloy fallopian tube stent, characterized in that: The invention comprises a circular tube-shaped catheter (3), the outer wall of the catheter (3) is provided with an expansion balloon (4), the outer wall of the expansion balloon (4) is provided with a circular tube-shaped support frame (1), the upper end of the catheter (3) is detachably connected with an expansion head (2), the support frame (1) comprises an outer fiber membrane (101), a magnesium alloy support frame (102) and an inner fiber membrane (103), the outer fiber membrane (101) is sleeved on the outer wall of the magnesium alloy support frame (102), the inner fiber membrane (103) is sleeved on the inner wall of the magnesium alloy support frame (102), the inner wall of the inner fiber membrane (103) is sleeved on the outer wall of the expansion balloon (4), the magnesium alloy support frame (102) comprises a plurality of corrugated rings (1021) evenly distributed from top to bottom, and connecting rods (1022) are fixed between the corrugated rings (1021); The interior of the catheter (3) is slidably connected to a medicine pushing piston (301), the inner wall of the catheter (3) is provided with a plurality of inflation holes (302) along its circumference, and the inner wall of the expansion head (2) is provided with a plurality of medicine discharge holes (201) along its circumference, and the medicine discharge holes (201) are connected to the catheter (3).
2. The degradable magnesium alloy fallopian tube stent according to claim 1, characterized in that: The length of the medicine pushing piston (301) is smaller than the distance from the inflation hole (302) to the medicine discharging hole (201).
3. The degradable magnesium alloy fallopian tube stent according to claim 1, characterized in that: The outer fiber membrane (101) and the inner fiber membrane (103) are both woven from polyester materials, and the outer fiber membrane (101) and the inner fiber membrane (103) completely wrap the magnesium alloy support frame (102).
4. The degradable magnesium alloy fallopian tube stent according to claim 1, characterized in that: The expansion head (2) is conical and is small at the top and large at the bottom.
5. The degradable magnesium alloy fallopian tube stent according to claim 1, characterized in that: The expansion balloon (4) is fixed to the outer wall of the catheter (3), and the expansion balloon (4) covers the inflation hole (302) inside thereof.
6. The degradable magnesium alloy fallopian tube stent according to claim 1, characterized in that: The expansion amount of the expansion balloon (4) at each cross section along the axial direction of the catheter (3) is the same.
7. The degradable magnesium alloy fallopian tube stent according to claim 1, characterized in that: The connecting rods (1022) fixed between the plurality of corrugated rings (1021) are staggered and fixed to each other.