A balloon catheter suitable for occluding the internal iliac artery and uterine artery

Abstract

The utility model relates to a balloon catheter suitable for occluding the internal iliac artery and the uterine artery, comprising a guide wire and a sheath tube, wherein a section of the sheath tube near the top of the sheath tube is a occluding section, and a blocking balloon is arranged circumferentially on the outer wall of the occluding section; the outer diameter of the occluding section gradually shrinks from both ends to the middle so that the outer wall of the occluding section is in an hourglass shape, and the inner diameter of the occluding section gradually shrinks from both ends to the middle along the hourglass shape so that the wall thickness of the occluding section is consistent with the wall thickness of other parts of the sheath tube; an injection tube is arranged in the sheath tube, one end of the injection tube is connected to the blocking balloon, and the other end extends out of the bottom end of the sheath tube along the length direction of the sheath tube for connecting with an external injection device. The utility model can solve the problem that the outer diameter of the catheter will be increased when the balloon is directly coated on the outside of the sheath tube of equal diameter, and the sheath tube itself has a reasonable outer diameter and wall thickness for doctors to operate, and has sufficient flexibility and strength to be stably advanced in the blood vessel to avoid affecting surgical operations and angiography.

Description

Technical Field

[0001] The utility model belongs to the technical field of medical devices, and in particular relates to a balloon catheter suitable for occluding the internal iliac artery and the uterine artery. Background Art

[0002] Placental abnormalities (such as placenta previa and placenta accreta) are one of the main causes of postpartum hemorrhage. In recent years, with the increase in cesarean section rates, the incidence of placenta previa has also gradually increased. In some areas, placenta previa has become the primary cause of postpartum hemorrhage. On this basis, the risk of placenta accreta also increases, causing severe postpartum hemorrhage, leading to hysterectomy, and the incidence of maternal and fetal complications also increases accordingly.

[0003] At present, the main preoperative intervention for dangerous placenta previa is abdominal aortic balloon occlusion, which requires puncturing the femoral artery on one side, inserting a 10F arterial catheter sheath, and then introducing a balloon catheter with a diameter of 16-18 mm below the opening of the renal artery in the abdominal aorta of the parturient, and then fixing the sheath and the extracorporeal part of the balloon catheter for cesarean section; after the fetus is delivered, the medical staff will use 6-10 ml of heparin saline to fill and expand the balloon, block the abdominal aorta, and finally complete the operation. Although direct blocking of the abdominal aorta can play a good hemostatic role or preoperative intervention to prevent heavy bleeding, it also blocks the blood supply to the lower limb on the same side. Long-term blockage of blood vessels can easily lead to ischemic necrosis of the lower limbs, and may even cause other complications, such as arterial thrombosis and ischemic injury of the femoral nerve; therefore, the use of abdominal aortic balloon for blocking and hemostasis can only be used for a short time and needs to be removed in time.

[0004] Currently, there is also a plan to set up blocking balloons in the uterine artery and internal iliac artery. Compared with the abdominal aorta balloon blocking technology, these two interventional interventions have a low incidence of complications and a low impact on the blood supply of other organs, and can be used for a long time. However, the outer diameter of the balloon blocking catheter for the abdominal aorta is generally 10F (1F=1 / 3mm), which cannot be directly used for embolization of the uterine artery and internal iliac artery. In addition, the uterine artery, as a branch of the internal iliac artery, requires a catheter with a thinner outer diameter, which increases consumables and is time-consuming and labor-intensive to operate. In addition, a balloon will be set outside the catheter. Even if the balloon is in the initial unfilled state, the catheter section where the balloon is located will be thicker. If the outer diameter of the catheter is simply reduced to accommodate the embolization of the uterine artery and internal iliac artery, the presence of the balloon will increase the overall outer diameter of the catheter. However, in actual operation, a catheter that is too thin will make it difficult to maneuver. When encountering tortuous or narrow blood vessels, it may cause difficulty in pushing, affecting the efficiency and success rate of the operation. A catheter that is too thin may bend or rupture during operation, increasing the risk of the operation. When the sheath is removed, a catheter that is too thin will not be obvious under the guidance of imaging, affecting the doctor's judgment of the catheter position and reducing the accuracy of the operation. Therefore, it is necessary to provide a new balloon catheter. Summary of the invention

[0005] In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by the present invention is to provide a balloon catheter suitable for occluding the internal iliac artery and the uterine artery, thereby avoiding the problem that the traditional abdominal aorta balloon occlusion catheter cannot be simultaneously applied to the embolization operations of the internal iliac artery and the uterine artery.

[0006] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0007] A balloon catheter suitable for occluding an internal iliac artery and a uterine artery comprises a guide wire and a sheath tube, wherein a section of the sheath tube near the top end of the sheath tube is a occluding section, and a blocking balloon is arranged circumferentially on the outer wall of the occluding section; the outer diameter of the occluding section gradually shrinks from both ends to the middle so that the outer wall of the occluding section is in an hourglass shape, and the inner diameter of the occluding section gradually shrinks from both ends to the middle along the hourglass shape so that the wall thickness of the occluding section is consistent with the wall thickness of other parts of the sheath tube;

[0008] An injection tube is arranged inside the sheath tube, one end of which is connected to the blocking balloon, and the other end of which extends out of the bottom end of the sheath tube along the length direction of the sheath tube for connecting to an external injection device.

[0009] To further improve the above technical solution, the outer wall of the blocking section is circumferentially connected with a layer of elastic film, and the film forms the blocking balloon;

[0010] When the blocking balloon is in a contracted state, the film contracts inwardly and fits on the outer wall of the blocking section to form a plurality of wrinkles.

[0011] Furthermore, the injection tube is attached to the inner wall of the sheath tube.

[0012] Furthermore, a plurality of developing lines are arranged on the outer wall of the sheath tube.

[0013] Furthermore, the outer diameter of the thinnest part of the occluding section is at least 2F and is smaller than the outer diameters of other equal-diameter parts of the sheath tube.

[0014] Furthermore, the outer diameters of other equal-diameter parts of the sheath are 3F-5F.

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] 1. The utility model is a balloon catheter suitable for occluding the internal iliac artery and the uterine artery. The sheath section on which the blocking balloon is arranged is improved in structure. The blocking section is designed to be hourglass-shaped. Compared with directly reducing the outer diameter of the sheath to make it suitable for the internal iliac artery and the uterine artery, the sheath with this structure can fit the blocking balloon in a contracted state on the outer wall of the hourglass-shaped blocking section. The outer diameter of the entire balloon catheter is the outer diameter of the sheath, which solves the problem that the outer diameter of the catheter will be increased when the balloon is directly coated on the outside of a sheath of equal diameter. At the same time, the wall thickness of the entire sheath remains unchanged, so that the sheath itself has a reasonable outer diameter and wall thickness for doctors to operate, and has sufficient flexibility and strength to be stably advanced in the blood vessel, and will not affect surgical operations and angiography due to the sheath outer diameter being too thin or the wall thickness being too thick.

[0017] 2. The utility model is a balloon catheter suitable for occluding the internal iliac artery and the uterine artery. The film forming the blocking balloon is designed to be wrinkled in the initial contracted state. In this way, a corresponding amount of liquid (such as saline) can be injected into the blocking balloon according to actual needs, so that the blocking balloon can reach different filling states corresponding to the uterine artery or the internal iliac artery, so as to block and closure the uterine artery or the internal iliac artery. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of a balloon catheter in use suitable for occluding the internal iliac artery and the uterine artery in an embodiment;

[0019] Figure 2 It is a partial structural schematic diagram of a balloon catheter suitable for occluding the internal iliac artery and the uterine artery according to an embodiment;

[0020] Among them, there are a sheath 1, an occluding section 101, a blocking balloon 2, an injection tube 3, an internal iliac artery 4, and a uterine artery 5. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical scheme and advantages of the embodiment of the utility model clearer, the technical scheme in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. The components of the embodiment of the utility model generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiment of the utility model provided in the drawings is not intended to limit the scope of the utility model claimed for protection, but merely represents the selected embodiment of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the utility model.

[0022] It should be noted that similar numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings. In the description of the utility model, it should be noted that the orientation or position relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or position relationship shown in the drawings, or the orientation or position relationship in which the utility model product is usually placed when used, which is only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance. In addition, the terms "horizontal", "vertical", etc. do not mean that the components are absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted. In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] The specific implementation of the utility model is further described in detail below in conjunction with the accompanying drawings.

[0024] See also Figure 1 and Figure 2A balloon catheter suitable for occluding the internal iliac artery and the uterine artery in a specific embodiment comprises a guide wire (not shown in the figure) and a sheath tube 1, a section of the sheath tube 1 near the top is a occluding section 101, and a blocking balloon 2 is circumferentially arranged on the outer wall of the occluding section 101; the outer diameter of the occluding section 101 gradually shrinks from both ends to the middle so that the outer wall of the occluding section 101 is in an hourglass shape, and the inner diameter of the occluding section 101 gradually shrinks from both ends to the middle along the hourglass shape so that the wall thickness of the occluding section 101 is consistent with the wall thickness of other parts of the sheath tube 1;

[0025] An injection tube 3 is arranged inside the sheath tube 1, one end of the injection tube 3 is connected to the blocking balloon 2, and the other end extends out of the bottom end of the sheath tube 1 along the length direction of the sheath tube 1 for connecting with an external injection device.

[0026] In an embodiment, a balloon catheter suitable for occluding the internal iliac artery and the uterine artery is designed in such a way that the sheath section on the sheath 1 for setting the blocking balloon 2 is designed to be hourglass-shaped, so that the blocking balloon 2 can be retracted inwardly and hidden outside the blocking section 101 in the initial state, without significantly increasing the outer diameter of the sheath body. The maximum outer diameter of the balloon catheter in the initial state is the outer diameter of the sheath 1 itself, so that the balloon catheter as a whole is suitable for embolization operations of the internal iliac artery 4 and the uterine artery 5.

[0027] Compared with directly reducing the outer diameter of the sheath 1 to make it suitable for embolization operations of the internal iliac artery and the uterine artery, the utility model makes a structural improvement on the sheath section on which the blocking balloon is arranged on the sheath 1, and designs the blocking section 101 into an hourglass shape, so that the blocking balloon 2 in a contracted state can fit on the outer wall of the hourglass-shaped blocking section 101, and the outer diameter of the entire balloon catheter is the outer diameter of the sheath 1. This can solve the problem that the blocking balloon 2 directly covering the outside of a sheath of equal diameter will increase the outer diameter of the catheter, and at the same time, it can make the sheath 1 itself have a reasonable outer diameter for the doctor's operation, and have sufficient strength to be stably advanced in the blood vessel, and the operation will not be affected by the sheath being too thin. At the same time, the overall wall thickness of the sheath 1 in the utility model remains unchanged, which is based on actual surgical operation considerations. Appropriate wall thickness can ensure the flexibility and strength of the sheath 1, so that the sheath 1 can be advanced to the designated position in the curved blood vessel; therefore, the utility model does not change the wall thickness of the sheath 1, but only designs the occluding section 101 into an hourglass shape to accommodate the blocking balloon 2 in the contracted state, and the inner diameter of the thinnest part of the occluding section 101 is sufficient to ensure that angiography can be performed.

[0028] Please continue to see Figure 2 , wherein the outer wall of the blocking section 101 is circumferentially connected with a layer of elastic film, and the layer of film forms the blocking balloon 2;

[0029] When the blocking balloon 2 is in a contracted state, the film contracts inwardly and fits onto the outer wall of the blocking section 101 to form a plurality of wrinkles.

[0030] In this way, compared with the elastic film design in the prior art, when the blocking balloon 2 is in a contracted state, the film shrinks inward and fits on the outer wall of the blocking section 101 to form a number of folds. When it is necessary to quickly block or restore blood flow, the blocking balloon 2 with a folded structure can respond quickly, expand and contract in time, and provide protection for emergency hemostasis.

[0031] During implementation, the specific material of the film can be polyurethane (PU), low-density polyethylene (LDPE), polyvinyl chloride (PVC), polyamide (PA) or polyethylene terephthalate (PETP).

[0032] See also Figure 2 , wherein the injection tube 3 is attached to the inner wall of the sheath tube 1 .

[0033] Since contrast agent needs to be injected into the sheath tube 1 during surgery, in order to facilitate operation, the injection tube 3 is arranged to be attached to the inner wall of the sheath tube 1. The injection tube 3 is fixed to the inner wall of the sheath tube 1 as a separate tube body.

[0034] During implementation, a plurality of developing lines are arranged on the outer wall of the sheath tube 1 .

[0035] The outer diameter of the thinnest part of the occluding section 101 is at least 2F and is smaller than the outer diameters of other equal-diameter parts of the sheath tube 1 .

[0036] In order to ensure that the thinnest part of the occluding section 101 can be used for angiography, its outer diameter is at least 2F, and at the same time, it is smaller than the outer diameter of other equal diameter parts of the sheath tube 1 to form an hourglass-shaped structure. In the prior art, the wall thickness of the sheath tube used for occluding the internal iliac artery and the uterine artery needs to be comprehensively determined in combination with the characteristics of the material used to balance strength and flexibility; and the outer diameter of the catheter for angiography is at least 2F, so in this embodiment, only the outer diameter of the thinnest part of the occluding section 101 is limited, and the wall thickness is not specifically limited.

[0037] Among them, the outer diameter of other equal-diameter parts of the sheath tube 1 is 3F-5F.

[0038] In this way, the outer diameter of the sheath 1 is designed to be 3F-5F, which is much smaller than 10F, and is suitable for embolization operations of the internal iliac artery 4 and the uterine artery 5; the best embodiment of the utility model is that the outer diameter of the thinnest part of the occluding section 101 is 2F, and the outer diameter of other equal-diameter parts of the sheath 1 is 4F.

[0039] When the balloon catheter of the utility model is used for occluding the internal iliac artery and the uterine artery, a guide wire is first inserted into the femoral artery, and then the guide wire is placed at a suitable position on the uterine artery 5 or the internal iliac artery 4 according to the existing surgical operation under fluoroscopy. Figure 1The uterine artery 5 is in the middle, and then the sheath tube 1 is lowered along the guide wire. Under the guidance of the guide wire, the sheath tube 1 reaches the intended position, and contrast agent is injected through the sheath tube 1 under fluoroscopy to perform angiography to determine that the occluding segment 101 is located in the correct working position; then physiological saline is injected into the blocking balloon 2 through the injection tube 3 through an external injection device, so that the blocking balloon 2 is filled to the working state and the uterine artery 5 is blocked. Of course, a certain color marking liquid can also be injected into the sheath tube 1 to facilitate medical staff to observe the location of uterine bleeding so as to suture and stop bleeding.

[0040] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A balloon catheter suitable for occluding the internal iliac artery and the uterine artery, comprising a guide wire and a sheath, characterized in that: A section of the sheath tube near the top end is a blocking section, and a blocking balloon is arranged circumferentially on the outer wall of the blocking section; the outer diameter of the blocking section gradually shrinks from both ends to the middle so that the outer wall of the blocking section is in an hourglass shape, and the inner diameter of the blocking section gradually shrinks from both ends to the middle along the hourglass shape so that the wall thickness of the blocking section is consistent with the wall thickness of other parts of the sheath tube; An injection tube is arranged inside the sheath tube, one end of which is connected to the blocking balloon, and the other end of which extends out of the bottom end of the sheath tube along the length direction of the sheath tube for connecting to an external injection device.

2. A balloon catheter suitable for occluding the internal iliac artery and the uterine artery according to claim 1, characterized in that: The outer wall of the blocking section is circumferentially connected with a layer of elastic film, which forms the blocking balloon; When the blocking balloon is in a contracted state, the film contracts inwardly and fits on the outer wall of the blocking section to form a plurality of wrinkles.

3. A balloon catheter suitable for occluding the internal iliac artery and the uterine artery according to claim 1, characterized in that: The injection tube is attached to the inner wall of the sheath tube.

4. A balloon catheter suitable for occluding the internal iliac artery and the uterine artery according to claim 1, characterized in that: A plurality of developing lines are arranged on the outer wall of the sheath tube.

5. A balloon catheter suitable for occluding the internal iliac artery and the uterine artery according to any one of claims 1 to 4, characterized in that: The outer diameter of the thinnest part of the occluding section is at least 2F and is smaller than the outer diameters of other equal-diameter parts of the sheath tube.

6. A balloon catheter suitable for occluding the internal iliac artery and the uterine artery according to claim 5, characterized in that: The outer diameter of other equal-diameter parts of the sheath is 3F-5F.

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