Non-vascular stent conveying system with balloon dilatation and conveying method
Through the non-vascular stent delivery system with balloon expansion, the outer tube is used to carry the balloon and the self-expanding stent to achieve lumen expansion and non-vascular stent implantation, which solves the problems of long operation time and high risk in the existing technology. Enables safer, more efficient operations.
Patent Information
- Application Number
- CN202310890512.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-07-19
- Publication Date
- 2025-01-21
AI Technical Summary
Existing non-vascular stent surgery requires the use of two instruments: catheter dilatation products and non-vascular stents, resulting in increased surgical time and increased risk.
A non-vascular stent delivery system with balloon expansion is provided, including an outer tube, a balloon and a self-expanding stent. The outer tube carries a balloon and a self-expanding stent. The balloon expands at the target location to expand the lumen. The self-expanding stent is released after the outer tube is withdrawn and self-expands to support the lumen.
Complete cavity dilatation and non -vascular stent implantation on a device to reduce surgery time and reduce the risk of surgery.
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Figure CN119326568A_ABST
Abstract
Description
Technical Field
[0001] The present disclosure relates to the field of medical technology, and in particular to a non-vascular stent delivery system and a delivery method with balloon expansion. Background Art
[0002] Non-vascular stents are luminal stents that expand the lumen and are used to treat diseases of the respiratory system, digestive tract, urinary system, etc.
[0003] Before stenting surgery, doctors need to use catheter expansion products to expand the target position of the cavity, and then implant the non-vascular stent. During this operation, doctors need to use two instruments, the non-vascular stent and the catheter expansion product, which greatly increases the operation time and the risk of the operation. Summary of the invention
[0004] In view of this, an object of the present disclosure is to provide a non-vascular stent delivery system with balloon expansion, which can complete expansion of a target position in a lumen and implantation of a non-vascular stent on a single device.
[0005] In order to achieve one of the above-mentioned disclosed purposes, the present disclosure provides a non-vascular stent delivery system with balloon expansion, comprising: an outer tube; a balloon, which is sleeved on the circumferential outer side of the outer tube and is configured to expand outward along the circumference of the outer tube after reaching a target position in a lumen to expand the lumen; and a self-expanding stent, which is contracted within one end of the outer tube and is configured to be released and self-expanded when the outer tube is withdrawn from the target position to support the expanded lumen.
[0006] In one or more embodiments, the non-vascular stent delivery system with balloon expansion also includes: a guide head, which is inserted into one end of the outer tube that converges the self-expanding stent and is used to guide the outer tube to move to the target position; a middle tube, which is received in the outer tube and is fixedly connected to the guide head, and a gap is reserved between the middle tube and the guide head for placing the self-expanding stent; the outer tube is configured to form a sliding connection with the middle tube and release the self-expanding stent when sliding in a direction away from the guide head.
[0007] In one or more embodiments, the non-vascular stent delivery system with balloon expansion further includes an inner core tube, and the guide head and the middle tube are connected via the inner core tube.
[0008] In one or more embodiments, at least one inflation channel communicating with the balloon is arranged on the circumferential wall of the outer tube.
[0009] In one or more embodiments, the inflation channel has a first end and a second end that are opposite to each other; an inflation connector is arranged on the first end and is sealed with the first end, and the inflation connector is used to connect with an external inflation device; an inflation hole connected to the balloon is opened on the outer tube, and the inflation hole is connected to the inflation channel and is close to the second end.
[0010] In one or more embodiments, the diameter of the inflation channel is 0.5 mm to 1 mm.
[0011] In one or more embodiments, a limiting portion protruding outward along the circumference of the self-expanding stent is formed at the end of the self-expanding stent.
[0012] To achieve the above-mentioned purpose, the present disclosure also provides another non-vascular stent delivery system with balloon expansion, comprising: an outer tube; a self-expanding stent, which is gathered in one end of the outer tube, and is configured to be released and self-expanded when the outer tube is withdrawn from the target position in the cavity, so as to perform a primary expansion and support the cavity; and a balloon, which is sleeved on the circumferential outer side of the outer tube and is configured to expand outwardly along the circumference of the outer tube after the outer tube is extended into the self-expanding stent, so as to drive the self-expanding stent to perform a secondary expansion and support the cavity.
[0013] To achieve the above objectives, the present disclosure also provides a delivery method, which is applied to the above-mentioned non-vascular stent delivery system with balloon expansion, and the delivery method includes: delivering the outer tube, the self-expanding stent and the balloon to the target position; inflating the balloon to expand the cavity; withdrawing the outer tube and the balloon to release the self-expanding stent, and the self-expanding stent supports the cavity.
[0014] To achieve the above-mentioned purpose, the present disclosure also provides another delivery method, which is applied to the above-mentioned non-vascular stent delivery system with balloon expansion, and the delivery method includes: delivering the outer tube, the self-expanding stent and the balloon to the target position; withdrawing the outer tube, releasing the self-expanding stent, and the self-expanding stent performs a primary expansion and supports the cavity; extending the outer tube and the balloon into the self-expanding stent; inflating the balloon, driving the self-expanding stent to perform a secondary expansion and support the cavity.
[0015] From the above description, it can be seen that the non-vascular stent delivery system with balloon expansion provided by the present disclosure has the following advantages:
[0016] The outer tube can carry the balloon and the self-expanding stent to the predetermined cavity at the same time, and can complete the two functions of predetermined cavity expansion and self-expanding stent implantation on one device, thereby reducing the time of the stent implantation operation and thus reducing the risk of the stent implantation operation. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 is a schematic diagram of a predetermined cavity;
[0018] Figure 2 is a schematic diagram of the overall structure of a non-vascular stent delivery system with balloon expansion provided by an embodiment of the present disclosure;
[0019] Figure 3 It is a schematic diagram of the state when the non-vascular stent delivery system with balloon expansion provided by the embodiment of the present disclosure is delivered to a predetermined cavity;
[0020] Figure 4 yes Figure 3 The enlarged schematic diagram of point A in the middle;
[0021] Figure 5 is a schematic diagram of the expanded state of the balloon provided by an embodiment of the present disclosure;
[0022] Figure 6 is a schematic diagram of a fully expanded state of a self-expanding stent provided by an embodiment of the present disclosure;
[0023] Figure 7 is a schematic diagram of a semi-expanded state of a self-expanding stent provided by an embodiment of the present disclosure;
[0024] Figure 8 is a schematic diagram of a balloon provided by an embodiment of the present disclosure extending into a self-expanding stent;
[0025] Fig. 9 is a schematic diagram of a balloon-expandable self-expanding stent provided in an embodiment of the present disclosure;
[0026] Fig.10 is a schematic diagram of the structure of an outer tube provided in an embodiment of the present disclosure;
[0027] Fig.11 is a flow chart of a first delivery method applied to a non-vascular stent delivery system with balloon expansion provided by an embodiment of the present disclosure;
[0028] Fig.12 It is a flow chart of another delivery method applied to a non-vascular stent delivery system with balloon expansion provided by an embodiment of the present disclosure. DETAILED DESCRIPTION
[0029] In order to make the objectives, technical solutions and advantages of the present disclosure more clearly understood, the present disclosure is further described in detail below in combination with specific embodiments and with reference to the accompanying drawings.
[0030] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present disclosure should be understood by people with ordinary skills in the field described in the present disclosure. The "first", "second" and similar words used in the embodiments of the present disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. "Including" or "comprising" and similar words mean that the elements or objects appearing before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.
[0031] Combined with reference Figures 1 to 10 A non-vascular stent delivery system with balloon expansion provided by an embodiment of the present disclosure includes an outer tube 6; a balloon 2, which is sleeved on the circumferential outer side of the outer tube 6 and is configured to expand outward along the circumference of the outer tube 6 after reaching a target position 101 in a lumen 100 to expand the lumen 100; and a self-expanding stent 3, which is contracted in one end of the outer tube 6 and is configured to be released and self-expanded when the outer tube 6 is withdrawn from the target position 101 to support the expanded lumen 100.
[0032] It can be understood that the balloon 2 is wrapped around the outer circumferential side of the outer tube 6, and has two states: contraction and expansion. In the contraction state 2a, it is tightly attached to the outer circumferential wall of the outer tube 6; in the expansion state 2b, it expands outward along the circumference of the outer tube 6. The self-expanding stent has two states: initial and fully expanded. The initial state 3a refers to the state in which it is contracted in the outer tube 6; the fully expanded state 3c refers to the state in which it is against the cavity 100 expanded by the balloon 2.
[0033] See also Figure 3 As shown, after the balloon 2 and the self-expanding stent 3 are delivered to the target position 101 in the cavity 100, the balloon 2 is first controlled to reach the expanded state 2b, pressing the cavity 100 and expanding the cavity 100; then the outer tube 6 is withdrawn from the target position 101 and the self-expanding stent 3 is released, and the self-expanding stent 3 reaches the fully expanded state 3c after being released, supporting the expanded cavity 100. In this arrangement, the balloon 2 and the self-expanding stent 3 share the outer tube 6 for delivery, and there is no need to change instruments during the operation, which can reduce the time of the operation and thus reduce the risk of the operation.
[0034] In some embodiments, the self-expanding stent 3 also has a semi-expanded state 3b. The semi-expanded state 3b refers to the state in which the self-expanding stent 3 expands the lumen 100 by relying on its own self-expanding properties and reaches a balance with the reverse force of the lumen 100. After the balloon 2 and the self-expanding stent 3 are delivered to the target position 101 in the lumen 100, the outer tube 6 is first withdrawn from the target position 101, and the self-expanding stent 3 is released at the target position 101, and the self-expanding stent 3 is expanded once by relying on its own self-expanding properties and reaches the semi-expanded state 3b; then the balloon 2 is controlled to extend into the self-expanding stent 3, and the balloon 2 is further controlled to reach the expanded state 2b to press against the self-expanding stent 3, so that the self-expanding stent 3 is expanded for a second time until it reaches the fully expanded state 3c; in this process, the lumen 100 expands with the expansion of the self-expanding stent 3 and is always supported by the self-expanding stent 3.
[0035] In some embodiments, the balloon 2 in the contracted state 2a is roughly fusiform, and its two ends are fixed to the outer tube 6 by bonding; the balloon 2 in the expanded state 2b includes a roughly cylindrical middle section and a roughly truncated cone-shaped end, the large end of the end is connected to the middle section, and the small end is away from the middle section. The self-expanding stent 3 in the fully expanded state 3c includes a roughly cylindrical main body 31 and a limiting portion 32 arranged at the end of the main body 31. The limiting portion 32 protrudes outward along the circumference of the main body 31, and is used to abut against the cavity 100. The diameter d2 of the self-expanding stent 3 is not less than the diameter d1 of the balloon 2.
[0036] It can be understood that the diameter d2 of the self-expanding stent 3 refers to the diameter of the lower limit portion 32 in the fully expanded state 3c; the diameter d1 of the balloon 2 refers to the diameter of the middle section in the expanded state 2b. The balloon 2 will expand the cavity 100 in the expanded state 2b. When the diameter d2 of the self-expanding stent 3 is not less than the diameter d1 of the balloon 2, the limit portion 32 of the self-expanding stent 3 can be stably installed on the cavity 100; on the contrary, when the diameter d2 of the self-expanding stent 3 is less than the diameter d1 of the balloon 2, the diameter of the cavity 100 after the balloon 2 is expanded is too wide, resulting in the risk of the self-expanding stent 3 slipping off the cavity 100.
[0037] Preferably, the length of the self-expanding stent 3 is not less than the length of the balloon 2 .
[0038] like Fig. 9As shown, the figure illustrates that the length of the self-expanding stent 3 is equal to the length of the balloon 2. It can be understood that the length of the self-expanding stent 3 and the length of the balloon 2 both refer to the length in the extension direction of the outer tube 6. The length of the self-expanding stent 3 refers to the length in the fully expanded state 3c, which includes the limiting portion 32; the length of the balloon 2 refers to the length of the middle section in the expanded state 2b, which does not include the end. The balloon 2 will expand the cavity 100 in the expanded state 2b. When the length of the self-expanding stent 3 is not less than the length of the balloon 2, the limiting portion 32 of the self-expanding stent 3 will abut against the edge of the expanded area or the unexpanded area of the cavity 100, so that the self-expanding stent 3 can be stably installed on the cavity 100; on the contrary, when the length of the self-expanding stent 3 is less than the length of the balloon 2, the self-expanding stent 3 is at risk of slipping in the expanded area, resulting in inaccurate positioning of the self-expanding stent 3.
[0039] In some embodiments, the non-vascular stent delivery system with balloon expansion also includes: a guide head 1, which is inserted into one end of the convergent self-expanding stent 3 of the outer tube 6 and is used to guide the outer tube 6 to move to the target position 101; a middle tube 7, which is received in the outer tube 6 and is fixedly connected with the guide head 1, and a gap is reserved between the middle tube 7 and the guide head 1 for placing the self-expanding stent 3; the outer tube 6 is configured to form a sliding connection with the middle tube 7 and release the self-expanding stent 3 when sliding in a direction away from the guide head 1.
[0040] Specifically, when the guide head 1 reaches the target position 101 in the cavity 100, the outer tube 6 moves away from the guide head 1, and the middle tube 7 abuts against the self-expanding stent 3 to prevent the self-expanding stent 3 from moving with the outer tube 6, thereby releasing the self-expanding stent 3; then the self-expanding stent 3 self-expands to support the cavity 100; finally, the guide head 1 is pulled out of the cavity 100 from the self-expanding stent 3.
[0041] In some embodiments, the non-vascular stent delivery system with balloon expansion further includes an inner core tube 4 , through which the guide head 1 and the middle tube 7 are connected.
[0042] Specifically, one end of the inner core tube 4 is fixedly connected to the guide head 1, and the connection mode can be any one of welding, bonding, etc. The middle tube 7 is sleeved on the circumferential outer side of the inner core tube 4 and is fixedly connected to the inner core tube 4, and the fixed connection can also be any one of welding, bonding, etc.
[0043] In some embodiments, the non-vascular stent delivery system with balloon expansion further includes: a front handle 9 , a positioning handle 11 , a tail wing 12 , a safety lock 10 , and a developing ring 5 .
[0044] Specifically, the front handle 9 is arranged at the end of the outer tube 6 away from the guide head 1, and is fixedly connected with the outer tube 6 to control the movement of the outer tube 6. The safety lock 10 is locked on the end of the front handle 9 away from the outer tube 6, and the outer tube 6 forms a releasable fixed connection with the middle tube 7 through the safety lock 10; when the safety lock 10 is locked, the outer tube 6 and the middle tube 7 form a fixed connection, and the two cannot move relative to each other; when the safety lock 10 is loosened, the outer tube 6 and the middle tube 7 can slide relative to each other, so as to release the self-expanding stent 3 or control the outer tube 6 to extend into the self-expanding stent 3. The developing ring 5 is inserted into the end of the middle tube 7 close to the self-expanding stent 3, and is against the self-expanding stent 3, so as to display the position of the self-expanding stent 3. The positioning handle 11 is arranged on the end of the middle tube 7 away from the developing ring 5, and the positioning handle 11 is fixedly connected with the developing ring 5 through the middle tube 7. The tail wing 12 is arranged at one end of the inner core tube 4 away from the seeker head 1 , and the tail wing 12 is fixedly connected to the seeker head 1 through the inner core tube 4 .
[0045] In some embodiments, at least one inflation channel 61 connected to the balloon 2 is provided on the circumferential wall 63 of the outer tube 6. The inflation channel 61 has a first end 611 and a second end 612 opposite to each other. An inflation connector 8 connected to the first end 611 is arranged on the first end 611, and the inflation connector 8 is used to communicate with an external inflation device; an inflation hole 62 connected to the balloon 2 is provided on the circumferential wall 63 of the outer tube 6, and the inflation hole 62 is connected to the inflation channel 61 and is close to the second end 612. The second end 612 is a closed structure to prevent the compressed gas delivered by the external inflation device from escaping from the second end 612.
[0046] Specifically, the outer tube 6 is substantially cylindrical and has a circumferential wall 63. The inflation connector 8 is fixed to the outer tube 6 by ultraviolet curing glue and is sealedly connected to the inflation channel 61. When the balloon 2 needs to be inflated to reach the expanded state 2b, the external inflation device delivers compressed gas to the inflation connector 8, and the compressed gas flows through the inflation connector 8 and the inflation channel 61, and flows into the balloon 2 through the inflation hole 62.
[0047] Preferably, there are multiple inflation channels 61, and the multiple inflation channels 61 are evenly arranged along the circumference of the outer tube 6; each inflation channel 61 corresponds to multiple inflation holes 62, and the multiple inflation holes 62 are arranged at intervals along the length direction of the inflation channel 61. When the balloon 2 needs to be inflated to reach the expanded state 2b, the multiple inflation channels 61 are inflated at the same time, and the compressed gas in each inflation channel 61 flows into the balloon 2 through the multiple inflation holes 62, so that the balloon 2 can be evenly expanded in the diameter direction and the length direction, so as to better expand the cavity 100 and the self-expanding stent 3.
[0048] Preferably, the diameter of the inflation channel 61 is 0.5 mm to 1 mm.
[0049] It is understandable that the inflation of the balloon 2 requires a relatively appropriate speed; a slow inflation speed will increase the operation time; on the contrary, a too fast inflation speed will cause the cavity 100 or the self-expanding stent 3 to expand too quickly, increasing the risk of the operation. When the diameter of the inflation channel 61 is 0.5 mm to 1 mm, the number of the inflation channels 61 is 3 to 5, and the number of the inflation holes 62 of each inflation channel 61 is 5 to 7, the balloon 2 has an appropriate inflation speed.
[0050] In some embodiments, the balloon 2 can be inflated in a variety of suitable ways. For example, a pressure channel is arranged between the middle tube 7 and the outer tube 6; accordingly, the inflation channel 61 is cancelled, and the pressure channel replaces the inflation channel 61 to connect the balloon 2 and the inflation connector 8, and the expansion and contraction of the balloon 2 is achieved by inflating or deflating the pressure channel. Or an inflation tube is arranged on the inner circumferential wall or the outer circumferential wall of the outer tube 6. Accordingly, the inflation channel 61 is cancelled, and the inflation tube replaces the inflation channel 61 to connect the balloon 2 and the inflation connector 8. The inflation tube can be integrally formed with the outer tube 6 or fixed to the outer tube 6 by bonding or the like. Other suitable methods will not be repeated here.
[0051] In some embodiments, the material of the balloon 2 is polylaurolactam. Alternatively, the material of the balloon 2 can be changed according to actual needs, for example, it can be polyvinyl chloride, polyethylene, polyethylene terephthalate, polyurethane, polyetheramide, nylon, etc.
[0052] Combined with reference Fig.11 Based on the same inventive concept, the present disclosure further provides a delivery method, which is applied to the non-vascular stent delivery system with balloon expansion in any of the above embodiments, and the delivery method comprises:
[0053] S11, delivering the outer tube 6, the self-expanding stent 3 and the balloon 2 to the target position 101;
[0054] S12, inflating the balloon 2 to expand the cavity 100;
[0055] S13 , the outer tube 6 and the balloon 2 are withdrawn to release the self-expanding stent 3 , which supports the cavity 100 .
[0056] Specifically, the guide head 1 is controlled to guide the outer tube 6, the self-expanding stent 3 and the balloon 2 to the target position 101 of the cavity 100. Then, the external inflation device is connected to the inflation connector 8, and the external inflation device is controlled to deliver compressed gas; the compressed gas flows into the balloon 2 through the inflation channel 61 and the inflation hole 62, and the balloon 2 is inflated from the contracted state 2a to the expanded state 2b; during the inflation process, the balloon 2 expands the cavity 100 to the diameter required by the self-expanding stent 3, and supports the cavity 100 in the expanded state 2b for a predetermined time to prevent the cavity 100 from rebounding rapidly. The predetermined time can be 10 minutes to 20 minutes.
[0057] After the balloon 2 supports for a predetermined time, the external inflation device is controlled to inhale air, so that the balloon 2 is deflated and retracted to the contracted state 2a; then the outer tube 6 is controlled to move away from the guide head 1, that is, the outer tube 6 is controlled to be withdrawn from the cavity 100; during this process, the self-expanding stent 3 is slowly released and self-expanded, and finally contacts and supports the cavity 100, and the operation is completed. In the scenario where the target position 101 of the cavity 100 is severely blocked and the self-expanding stent 3 cannot expand the cavity 100 by its own self-expanding property, the above-mentioned delivery method can effectively expand the cavity 100, facilitating the implantation of the self-expanding stent 3.
[0058] Combined with reference Fig.12 Based on the same inventive concept, the present disclosure also provides another delivery method, which is applied to the non-vascular stent delivery system with balloon expansion in any of the above embodiments, and the delivery method includes:
[0059] S21, delivering the outer tube 6, the self-expanding stent 3 and the balloon 2 to the target position 101;
[0060] S22, the outer tube 6 is withdrawn to release the self-expanding stent 3, and the self-expanding stent 3 is expanded once to support the cavity 100;
[0061] S23, extending the outer tube 6 and the balloon 2 into the self-expanding stent 3;
[0062] S24 , inflating the balloon 2 to drive the self-expanding stent 3 to perform secondary expansion and support the cavity 100 .
[0063] Specifically, the guide head 1 is controlled to guide the outer tube 6, the self-expanding stent 3 and the balloon 2 to the target position 101 of the lumen 100. The outer tube 6 is controlled to move away from the guide head 1, that is, the outer tube 6 is pulled away from the target position 101; during this process, the self-expanding stent 3 is slowly released and expands once by relying on its self-expanding property, and at the same time, the self-expanding stent 3 can support the lumen 100 during the expansion and expand the lumen 100 accordingly, until the self-expanding stent 3 reaches a semi-expanded state (the state when the self-expanding stent 3 expands the lumen 100 by relying on its own self-expanding property and reaches a balance with the reverse force of the lumen 100).
[0064] After the self-expanding stent 3 reaches the semi-expanded state 3b, the outer tube 6 is controlled to move toward the guide head 1 and extend into the self-expanding stent 3 again until the balloon 2 coincides with the orthographic projection of the self-expanding stent 3. Then, the external inflation device is connected to the inflation connector 8 and the external inflation device is controlled to deliver compressed gas; the compressed gas flows into the balloon 2 through the inflation channel 61 and the inflation hole 62, so that the balloon 2 is inflated from the contracted state 2a to the expanded state 2b. During the inflation process, the balloon 2 drives the self-expanding stent 3 to expand a second time until the self-expanding stent 3 reaches the fully expanded state 3c; during this process, the self-expanding stent 3 always supports the cavity 100, and the cavity 100 also expands with the expansion of the self-expanding stent 3.
[0065] After the self-expanding stent 3 reaches the fully expanded state 3c for a predetermined time, the external inflation device is controlled to inhale air, so that the balloon 2 is deflated and retracted to the contracted state 2a; finally, the outer tube 6 and the balloon 2 are controlled to be withdrawn from the cavity 100, and the operation is completed. This method can be used in the case where the target position 101 of the cavity 100 is slightly blocked, and can also be used in the case where the target position 101 is severely blocked, and has a wider range of applications.
[0066] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present disclosure (including the claims) is limited to these examples. Based on the concept of the present disclosure, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the embodiments of the present disclosure as described above, which are not provided in detail for the sake of simplicity.
[0067] The embodiments of the present disclosure are intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the embodiments of the present disclosure should be included in the scope of protection of the present disclosure.
Claims
1. A non-vascular stent delivery system with balloon expansion, characterized in that: include: External pipe; A balloon, the balloon is sleeved on the outer side of the outer tube in the circumferential direction and is configured to expand outward along the circumferential direction of the outer tube after reaching a target position in the cavity to expand the cavity; and A self-expanding stent is gathered in one end of the outer tube and is configured to be released and self-expanded when the outer tube is withdrawn from the target position, so as to support the expanded lumen.
2. The non-vascular stent delivery system with balloon expansion as claimed in claim 1, characterized in that: The non-vascular stent delivery system with balloon expansion also includes: A guide head, the guide head is inserted into one end of the outer tube that converges the self-expanding stent, and is used to guide the outer tube to move to the target position; A middle tube, which is received in the outer tube and fixedly connected with the guide head, and a gap for placing the self-expanding stent is reserved between the middle tube and the guide head; The outer tube is configured to form a sliding connection with the middle tube and release the self-expanding stent when sliding in a direction away from the introducer.
3. The non-vascular stent delivery system with balloon expansion as claimed in claim 2, characterized in that: The non-vascular stent delivery system with balloon expansion further comprises an inner core tube, through which the guide head and the middle tube are connected.
4. The non-vascular stent delivery system with balloon expansion as claimed in claim 2, characterized in that: At least one inflation channel connected to the balloon is arranged on the circumferential wall of the outer tube.
5. The non-vascular stent delivery system with balloon expansion as claimed in claim 4, characterized in that: The inflation channel has opposing first and second ends; An inflation connector is arranged on the first end to form a sealed connection with the first end, and the inflation connector is used to communicate with an external inflation device; An inflation hole connected to the balloon is provided on the outer tube, and the inflation hole is connected to the inflation channel and is close to the second end.
6. The non-vascular stent delivery system with balloon expansion as claimed in claim 4, characterized in that: The diameter of the inflation channel is 0.5 mm to 1 mm.
7. The non-vascular stent delivery system with balloon expansion as claimed in claim 2, characterized in that: A limiting portion protruding outward along the circumference of the self-expanding stent is formed at the end of the self-expanding stent.
8. A non-vascular stent delivery system with balloon expansion, characterized in that: include: External pipe; a self-expanding stent, the self-expanding stent being gathered in one end of the outer tube, the self-expanding stent being configured to be released and self-expanded when the outer tube is withdrawn from a target position in the lumen, so as to perform a primary expansion and support the lumen; and A balloon is sleeved on the circumferential outer side of the outer tube and is configured to expand outwardly along the circumference of the outer tube after the outer tube extends into the self-expanding stent, so as to drive the self-expanding stent to perform secondary expansion and support the cavity.
9. A conveying method, characterized in that: The delivery method is applied to the non-vascular stent delivery system with balloon expansion according to any one of claims 1 to 7, and the delivery method comprises: delivering the outer tube, the self-expanding stent, and the balloon to the target location; Inflating the balloon to expand the cavity; The outer tube and the balloon are withdrawn to release the self-expanding stent, which supports the lumen.
10. A conveying method, characterized in that: The delivery method is applied to the non-vascular stent delivery system with balloon expansion according to claim 8, and the delivery method comprises: delivering the outer tube, the self-expanding stent, and the balloon to the target location; Pulling out the outer tube to release the self-expanding stent, so that the self-expanding stent expands once and supports the cavity; extending the outer tube and the balloon into the self-expanding stent; The balloon is inflated to drive the self-expanding stent to expand a second time and support the cavity.