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CN-224220567-U - Three-stage expansion saccule with positioning function

CN224220567UCN 224220567 UCN224220567 UCN 224220567UCN-224220567-U

Abstract

The utility model belongs to the technical field of medical instruments, and particularly relates to a three-stage expansion saccule with a positioning function. Aiming at the problems that the relative position of a delivery sheath and a positioning sheath cannot be effectively locked after the existing three-stage expansion balloon is positioned, and the positioning balloon can only be fixed by simple friction, the proposal is now provided that the three-stage expansion balloon comprises an expansion balloon body, a delivery sheath, a positioning sheath and a positioning balloon body. The positioning sacculus body is provided with two-stage filling fixed states, an inner concave circular groove is prefabricated on the inner side surface of the positioning sacculus body, the inner concave circular groove keeps a groove shape when filling to the first-stage pressure, and the positioning sacculus body is in an outwards protruding state when filling to the second-stage pressure. The inner wall of the positioning sheath tube is provided with an annular groove, the notch part of the annular groove is connected with an annular diaphragm in a sealing way, and the annular diaphragm is externally protruded and tightly attached to the outer wall of the tube body of the delivery sheath tube when in an inflated state. The utility model realizes the cooperative integration of the positioning, locking and expanding functions through the two-stage fixing of the positioning balloon and the locking mechanism of the annular diaphragm.

Inventors

  • ZHANG XIANG

Assignees

  • 内蒙古博约微宏生物科技有限公司

Dates

Publication Date
20260512
Application Date
20260401

Claims (9)

  1. 1. The three-stage expansion balloon with the positioning function comprises an expansion balloon body (1), a conveying sheath tube (2), a positioning sheath tube (3) and a positioning balloon body (4), and is characterized in that one end of the conveying sheath tube (2) is connected with the expansion balloon body (1) in a sealing mode, the positioning sheath tube (3) is sleeved on the conveying sheath tube (2) in an axially movable fit mode, the positioning balloon body (4) is connected to one end, facing the expansion balloon body (1), of the positioning sheath tube (3), and the expansion balloon body (1) has an elastic deformation state of three-stage radial expansion along with pressure change; the positioning balloon body (4) is provided with two-stage filling fixed states, an inner concave circular groove (41) is prefabricated on the inner side surface of the positioning balloon body (4), the inner concave circular groove (41) keeps a groove shape when the positioning balloon body (4) is filled to the first-stage pressure, and the inner concave circular groove (41) is in an outwards protruding state when the positioning balloon body (4) is filled to the second-stage pressure; The inner wall of the positioning sheath tube (3) is provided with an annular groove (36), the notch part of the annular groove (36) is connected with an annular diaphragm (5) in a sealing way, the annular diaphragm (5) is attached to the groove wall of the annular groove (36) in an initial state, and the annular diaphragm (5) is externally protruded and attached to the outer wall of the tube body of the delivery sheath tube (2) when the groove of the annular groove (36) is in an inflated state.
  2. 2. The three-stage expansion balloon with the positioning function according to claim 1, wherein the expansion balloon body (1) comprises a balloon body middle section (11) which is integrally formed, and a balloon body reducing section (12) and a balloon body butt joint section (13) which are sequentially connected to two ends of the balloon body middle section (11), the balloon body butt joint section (13) is in sealing connection with the tube wall of the delivery sheath tube (2), and the balloon body reducing section (12) is of a smooth transition conical structure.
  3. 3. The three-stage expansion balloon with the positioning function according to claim 1, wherein an inner concave surface tube section (21) is arranged on the conveying sheath tube (2), the positioning sheath tube (3) is sleeved on the inner concave surface tube section (21) of the conveying sheath tube (2), the outer wall of a tube body of the conveying sheath tube (2) positioned in the expansion balloon body (1) is connected with a developing ring (22) in an embedded manner, and the connecting positions of the developing ring (22) are correspondingly arranged at two ends of the balloon body middle section (11).
  4. 4. The three-stage expansion balloon with the positioning function according to claim 1, wherein a tube body of the delivery sheath tube (2) is provided with an expansion delivery cavity (24) and a guide wire cavity (25) which are independent of each other, the expansion delivery cavity (24) is provided with a delivery hole (23) towards the end wall of the expansion balloon body (1), the expansion delivery cavity (24) is communicated with the inner cavity of the expansion balloon body (1) through the delivery hole (23), the rear end of the delivery sheath tube (2) is fixedly connected with a tube tail joint (26), the expansion delivery cavity (24) and the guide wire cavity (25) are communicated with the tube tail joint (26), and the guide wire cavity (25) extends along the axial direction of the delivery sheath tube (2) and penetrates through the two ends of the delivery sheath tube (2).
  5. 5. The three-stage dilation balloon with positioning function according to claim 4, wherein a delivery connecting pipe (27) and a guide wire connecting pipe (28) are connected to the tail joint (26), the delivery connecting pipe (27) is communicated with the dilation delivery cavity (24) through the tail joint (26), and the guide wire connecting pipe (28) is communicated with the guide wire cavity (25) through the tail joint (26).
  6. 6. The three-stage expanding balloon with the positioning function according to claim 1, wherein a positioning conveying cavity (34) and a locking conveying cavity (35) which are mutually independent are formed in the positioning sheath tube (3), the positioning conveying cavity (34) is communicated with the inside of the positioning balloon body (4), the locking conveying cavity (35) is communicated with the inside of a groove of the annular groove (36), one end, far away from the positioning balloon body (4), of the positioning sheath tube (3) is connected with a positioning joint (31) movably sleeved on the tube body of the conveying sheath tube (2), the positioning joint (31) is connected with a three-way regulating valve (32) in an embedded mode, and the butt joint ends of the positioning joint (31), the positioning conveying cavity (34) and the locking conveying cavity (35) are respectively communicated with three passage interfaces of the three-way regulating valve (32).
  7. 7. The three-stage expanding balloon with the positioning function according to claim 6, wherein a plurality of annular grooves (36) are formed in the inner wall of the positioning sheath tube (3) at equal intervals, and the annular grooves (36) are independently communicated with the locking conveying cavity (35).
  8. 8. The three-stage expanding balloon with the positioning function according to claim 1, wherein the reinforcing rib net sheet (42) is embedded in the position of the balloon body of the positioning balloon body (4) corresponding to the inner concave circular groove (41).
  9. 9. The three-stage expansion balloon with the positioning function according to claim 1, wherein the front end of the delivery sheath (2) is connected with a soft head (6) in a sealing way, and the soft head (6) is of a circular arc structure.

Description

Three-stage expansion saccule with positioning function Technical Field The utility model relates to a three-stage expansion saccule, in particular to a three-stage expansion saccule with a positioning function, and belongs to the technical field of medical appliances. Background At present, when the diseases of human physiological cavity stenosis or obstruction such as respiratory tract, alimentary canal, urinary tract, blood vessel and the like are treated, an expansion balloon is generally used for auxiliary treatment before expansion clinically. Currently, single-stage expansion balloons and three-stage expansion balloons exist in the market, and the single-stage expansion balloons basically stabilize the expansion diameter of the balloon at a certain value under the control of pressure. Compared with a three-stage expansion balloon, the single-stage expansion balloon can complete expansion by using a plurality of balloon catheters in interventional operation, which directly leads to the extension of operation time and increases the economic burden of patients. The three-stage expansion saccule (progressive type) realizes staged pressurization (such as low-medium-high pressure) through a pressure pump, so that the risk of tissue tearing caused by disposable high-pressure expansion is avoided, the length of the expansion saccule is generally longer than a narrow area in order to effectively expand and prevent slipping in the expansion process, and when the narrow area is distributed in a tissue bending or bifurcation pipeline, the compliance defect can be caused by the overlong expansion saccule body of the conventional single saccule structure, so that the damage is caused to a patient when the saccule is expanded. Namely, the prior three-stage expansion saccule still has a plurality of technical defects in the using process to be solved. In the prior art, as disclosed in publication number CN106039550a, an endoluminal balloon catheter is disclosed which comprises a flexible catheter and a balloon disposed on the distal end of the flexible catheter, the balloon being made up of a plurality of parts, the endoluminal balloon catheter being further provided with a securing device such as a retaining ring for securing the position of the inserted endoluminal balloon catheter, the securing device being made up of two mating parts having a channel extending therefrom into which the flexible catheter can be inserted and a spring or locking structure provided on the parts to prevent sliding of the inserted flexible catheter. This technique, while providing a positioning function, has a positioning structure that is an external additional component, is structurally complex and inconvenient to operate, and more importantly, has a locking structure that is a mechanical spring or buckle, the locking force being concentrated at a localized point, which is prone to damage to the catheter wall and which does not allow for fine positional fine adjustments that are continuously adjustable during surgery, and a system and method for controlled delivery of a medical device into a patient is disclosed as publication No. CN113301941a, which is supported by a lockable balloon catheter equipped with a locking mechanism that is configured to lock in the body to a delivery assembly, such as a guidewire, which can be controllably transitioned between a locking mode of operation and an unlocking mode of operation by inflating or deflating the balloon. Although the technology provides the concept of realizing locking by balloon inflation, the locking object is the relative position between guide wires and not between catheters, the balloon structure is a single balloon body, the multi-stage positioning and adsorption functions are lacked, and in a complex-bending physiological cavity, the problem of displacement after positioning is easy to occur because the single balloon is only used for expanding and fixing and is difficult to resist traction force from multiple directions. In addition, the existing three-stage expansion balloon has the technical defects that firstly, the positioning function is separated from the expansion function, the relative position of a conveying sheath tube and the positioning sheath tube cannot be effectively locked after positioning, the expansion balloon can deviate from a lesion part due to slight external force in operation, secondly, the positioning balloon can only realize simple mechanical friction fixation, has poor fixation effect in a bending or bifurcation pipeline and is easy to slip, thirdly, the balloon has fracture risk in the high-pressure expansion process, once the fracture can cause leakage of contrast agent, serious injury is caused to a patient, thirdly, the structure compliance of the existing balloon is poor, and when the stenosis is distributed in the tissue bending or bifurcation pipeline, the overlong balloon has poor compliance, and extra injury is caused to the patient. Disc