CN212213936U - Stent implantation conveyor and implantation system - Google Patents

Abstract

The present disclosure relates to a stent implantation transporter and an implantation system. Conveyer is implanted to support, including main part, restraint piece and release wire, the main part has the outer end that is used for linking to each other with operating handle and is used for implanting human inner, inner is formed with the installation department that is used for installing tectorial membrane support, restraint piece be used for with tectorial membrane support compresses to on the installation department, the one end detachably of release wire connects restraint piece, the other end extends to the outer end is in order can be external right restraint piece unlocks. According to the stent graft release device, the covered stent is constrained on the mounting part through the constraining piece, the constraining piece can be unlocked by pulling the release wire, the radial size of the stent graft conveyor is favorably reduced, and the success rate of the operation is improved.

Description

Stent implantation conveyor and implantation system

Technical Field

The disclosure relates to the field of implantation medical treatment, in particular to a stent implantation conveyor and an implantation system.

Background

In implantation medical treatment, for example, in the treatment of vascular diseases, it is often necessary to implant a stent graft into a diseased blood vessel of a human body, and the stent graft needs to be delivered to the site of the disease by means of a stent graft delivery device. The existing stent implantation conveyor comprises a guide sheath, a guide core, a guide head and a covered stent release device, wherein the guide core, the covered stent and an outer sheath tube are sequentially arranged from inside to outside, the covered stent release device is arranged on the guide head and can be composed of an expandable metal stent or a plurality of traction guide wires connected with the covered stent, when the stent implantation conveyor is implanted in place, the guide sheath is taken out, and then the covered stent is spread through the covered stent release device to form a new blood channel. Thus, there are more metal parts near the guide head of the transporter, which increases its radial dimension, which is more likely to damage the intact vessel during the transportation, and the trafficability of the transporter is poor when encountering a vessel segment with a smaller curvature, which increases the difficulty and risk of the operation.

SUMMERY OF THE UTILITY MODEL

The present disclosure provides a stent implantation conveyor and an implantation system, which can avoid the problem of thread entanglement and improve the success rate of surgery.

In order to achieve the above object, the present disclosure provides a conveyor for stent implantation, including main part, restraint piece and release wire, the main part has the outer end that is used for linking to each other with operating handle and the inner that is used for implanting the human body, the inner is formed with the installation department that is used for installing the tectorial membrane support, restraint piece be used for with the tectorial membrane support compresses to on the installation department, the one end detachably of release wire is connected restraint piece, and the other end extends to the outer end is in order can be external to the restraint piece unblock.

Optionally, the constraining member is configured as a constraining film wrapped around the outer circumferential surface of the stent graft, an axially-through suture opening is formed on a side wall of the constraining film, the release wire is releasably sutured to the suture opening and extends outwards, so that the constraining film comprises a sutured state in which the release wire is sutured and fixed at the suture opening and a disassembled state in which the release wire is released from the suture opening to radially expand the stent graft under the action of elastic restoring force.

Optionally, an axially extending first through hole is formed in the guide head, an axially extending second through hole is formed in the guide core, and the first through hole and the second through hole are used for allowing a main body guide wire preset in the body to pass through.

Optionally, the restraint can compress the stent graft to a diameter no greater than the diameter of the sheath.

Optionally, the first channel extends along a centerline of the sheath, and the second channels are spaced around a circumferential direction of the first channel.

Optionally, at least a part of the second cavity is provided with an inner tube, and the inner tube is attached to the inner wall of the second cavity and fixed.

Optionally, the stent implantation transporter further comprises a fixing wire, the restraint piece is detachably fixed on the fixing wire, the inner end of the fixing wire is releasably embedded in the guide head, and the outer end of the fixing wire is movably arranged in the sheath tube and extends to the operating handle.

Optionally, a limiting knot is formed on the fixing wire, a limiting ring is arranged on the restraint piece, the size of the limiting knot is larger than that of the limiting ring, the fixing wire penetrates through the limiting ring, and the limiting knot is located on one side, away from the guide head, of the limiting ring.

Optionally, an opening is further formed in the side wall of the restraint member, and the opening is used for avoiding the branch tectorial membrane in the tectorial membrane stent.

Optionally, the stent delivery device further comprises a plurality of inner tubes, each inner tube for providing a passage through the sheath for the release wire or the fixation wire, respectively.

Another aspect of the present disclosure also provides an implantation system comprising an operating handle that interfaces with the outer end of the body and a stent implantation conveyor as described above.

Through the technical scheme, the stent implantation conveyor restrains the covered stent 5 on the installation part through the restraint part 2, the restraint part 2 can be unlocked by the traction release wire 3, so that the covered stent 5 is released, and thus, a covered stent release device in the related technology is not required to be arranged, so that the number of components is reduced, the radial size of the stent implantation conveyor is favorably reduced, the trafficability of the stent implantation conveyor is improved, and the success rate of an operation is increased.

Additional features and advantages of the disclosure will be set forth in the detailed description which follows.

Drawings

The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure without limiting the disclosure. In the drawings:

FIG. 1 is a schematic view of a stent implantation transporter in one embodiment of the present disclosure;

FIG. 2 is a schematic structural view of a restraint in one embodiment of the present disclosure, showing one side of the seam;

FIG. 3 is a cross-sectional view taken along line A-A of FIG. 1;

FIG. 4 is an enlarged partial view of region B of FIG. 1;

FIG. 5 is an enlarged partial view of the inner end of the stent graft delivery device in one embodiment of the present disclosure;

FIG. 6 is a schematic illustration of a restraint in an embodiment of the disclosure, showing one side of the opening.

Description of the reference numerals

1-a body; 11-an outer end; 12-an inner end; 13-a guide core; 14-sheath; 141-a first channel; 142-a second lumen; 15-a seeker; 16-an inner tube; 2-a restraint; 21-sewing up the opening; 22-a stop collar; 23-opening; 3-releasing the silk; 4-fixing the silk; 41-limiting knot; 5-covered stent; 51-branch film covering; 6-operating a handle.

Detailed Description

The following detailed description of specific embodiments of the present disclosure is provided in connection with the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present disclosure, are given by way of illustration and explanation only, not limitation.

In the present disclosure, where not otherwise stated, directional words such as "inner and outer" are used to refer to the inner and outer of the respective component profiles, the "inner end" of the stent graft transporter refers to the end that can be implanted into the human body, and the "outer end" refers to the end that is located outside the human body. The foregoing directional terms are used only to explain and illustrate the present disclosure, and are not to be construed as limiting the present disclosure. Furthermore, the use of terms such as "first," "second," etc., are used to distinguish one element from another, and are not necessarily order nor importance. In addition, in the description with reference to the drawings, the same reference numerals in different drawings denote the same elements.

Embodiments of the present disclosure provide a stent implantation transporter, as shown in fig. 1 to 6, including a main body 1, a constraining member 2, and a release wire 3. The main body 1 is provided with an outer end 11 connected with the operating handle 6 and an inner end 12 implanted into a human body, the inner end 12 is provided with a mounting part for mounting the covered stent 5, the restraint part 2 is used for compressing the covered stent 5 onto the mounting part, one end of the release wire 3 is detachably connected with the restraint part 2, and the other end of the release wire extends to the outer end 11 so as to unlock the restraint part 2 in vitro.

When the implantation operation is performed, the covered stent 5 is installed on the installation part through the restraint part 2, then the covered stent 5 is implanted into a human blood vessel by carrying the covered stent 5 through the main body 1, the covered stent 5 is implanted to the lesion position of the blood vessel, and then the release wire 3 in the second cavity 142 is pulled from the outer end 11 to unlock the restraint part 2, so that the restraint on the covered stent 5 is released, the covered stent 5 is released and attached to the lesion position, and the treatment purpose of repairing the lesion blood vessel is achieved.

According to the structure and the working principle of the stent implantation conveyor, the stent implantation conveyor restrains the covered stent 5 on the mounting part through the restraint part 2, the restraint part 2 can be unlocked by pulling the release wire 3, and the covered stent 5 is released, so that a covered stent release device in the related technology is not required to be arranged, the number of components is reduced, the radial size of the stent implantation conveyor is favorably reduced, the trafficability of the stent implantation conveyor is improved, and the success rate of an operation is increased.

It should be noted here that since lesion vessels at different positions have different diameters, stent graft conveyors of different diameter sizes are required; and the surgical plan designed according to the position of the lesion blood vessel and the physical condition of the patient is different, resulting in different positions of the puncture incision, and thus different lengths of the stent graft conveyors. In view of this, the present disclosure does not limit the length and diameter of the main body 1 of the stent graft transporter, and different types of stent graft transporters having different lengths and diameters may be designed.

Hereinafter, the detailed structure of the stent graft transporter in the above-described embodiment will be described in detail with reference to fig. 1 to 6.

As shown in fig. 1, 2 and 4, the stent implantation transporter of the present disclosure includes a constraining member 2, and the constraining member 2 may have various structural forms, which the present disclosure does not limit. In one example of the present disclosure, the restraint 2 is configured as a restraining film for wrapping the outer circumferential surface of the stent graft 5, which may be medical gauze, or a special membranous material such as polytetrafluoroethylene, dacron, polyester, polyurethane, or the like, but is not limited thereto. In addition, an axially through-penetrating sewing opening 21 is formed in the side wall of the binding membrane, and the release wire 3 is releasably sewn to the sewing opening 21 and extends outward so that the binding membrane includes a sewn state and a disassembled state. Wherein:

in the state of the suture of the binding membrane, the suture hole 21 is sutured by the release thread 3 so that the binding membrane is formed in a tubular shape, and the stent graft 5 is compressed inside the binding membrane. The diameter of the constrained membrane in the sutured state may be determined according to the diameter of the stent graft transporter, for example, in one example, the constrained membrane may have a diameter approximately equal to the diameter of the sheath 14, such that the stent graft 5 within the constrained membrane has a diameter less than or equal to the diameter of the sheath 14, or such that the stent graft 5 has a diameter slightly larger than the diameter of the sheath 14, so long as the passage of the stent graft transporter within the vessel is not affected.

In the detached state of the binding membrane, the release wire 3 is released from the suture opening 21, so that the covered stent 5 is radially expanded under the action of elastic restoring force, two ends of the covered stent 5 are attached to the inner wall of a normal blood vessel, and the middle section isolates a diseased blood vessel to establish a new blood vessel channel. It should be noted that, when the binding membrane is detached, the binding membrane can be left in vivo to be attached between the stent graft and the blood vessel, and therefore, the binding membrane can be made of a material with high biocompatibility.

In order to guide the main body 1 to smoothly advance along the blood vessel, as shown in fig. 1, the main body 1 further comprises a guide head 15, a guide core 13 and a sheath 14, wherein the guide head 15 is fixed at the inner end 12 of the guide core 13, and the guide head 15 has a conical shape or other streamline structures so as to be capable of guiding the guide core 13 to move along the blood vessel wall without damage. And, a first through hole extending axially is formed in the guide head 15, and a second through hole extending axially is formed in the guide core 13, the first through hole and the second through hole are used for allowing a main guide wire preset in the body to pass through, and the main guide wire is implanted into the blood vessel in advance to play a role of guiding the stent implantation conveyor, so that the guide head 15 and the guide core 13 are advanced in the blood vessel along the path of the guide wire.

Further, the sheath 14 and the guide head 15 are provided at intervals along the guide core 13 so that a section of the guide core 13 between the guide head 15 and the sheath 14 is configured as a mounting portion. The installation part is arranged close to the guide head 15, namely the position of the covered stent 5 can be determined according to the position of the guide head 15, and when the guide head 15 is pushed to just cross the lesion blood vessel section, the pushing is stopped, so that the covered stent 5 can be accurately positioned at the lesion blood vessel. Further, since the mounting portion is a segment on the guide core 13, the radial dimension of the guide core 13 is smaller than the radial dimension of the sheath 14, and when the stent graft 5 is mounted on the mounting portion, the stent graft can be compressed to a size close to the radial dimension of the sheath 14 as much as possible, thereby avoiding the problem of friction between the stent graft 5 and the blood vessel wall during the delivery.

In the embodiment of the present disclosure, as shown in fig. 3, the sheath 14 is a multi-lumen sheath and includes a first lumen 141 and a second lumen 142 that are axially through, wherein the first lumen 141 serves as a passage for the guide core 13 and has a diameter that can match the diameter of the guide core 13. The second lumen 142 is plural so as to allow other wires to movably pass therethrough in a one-to-one correspondence, and for example, the second lumen 142 may include a lumen accommodating the release wire 3, a lumen accommodating the fixing wire 4 (to be mentioned later), channels respectively accommodating branch guide wires of the stent graft 5, and the like. The number of second channels 142 is designed according to the surgical needs, for example, the present disclosure does not limit thereto. The sheath tube 14 can provide mutually independent channels for the components such as the guide core 13 and the silk thread, so that the problem of mutual winding between the guide core 13 and the silk thread is avoided, and the operation risk is reduced.

It should be noted that the diameters of the first and second channels 141 and 142 may be different, and since the diameter of the wire such as the guide wire is smaller than the diameter of the guide core 13, the diameter of the second channel 142 may be smaller than the diameter of the first channel 141, but the disclosure is not limited thereto. For example, in other embodiments, the diameter of the second channel 142 may be greater than or equal to the diameter of the first channel 141.

Alternatively, the first channel 141 and the second channel 142 may be arranged in various ways, and in one example of the present disclosure, the first channel 141 extends along a center line of the sheath 14, and the second channels 142 are arranged at intervals around a circumferential direction of the first channel 141. Thus, the sheath 14 is a central symmetrical structure, and the smoothness of the implantation process is prevented from being influenced by eccentricity.

Optionally, the stent implantation transporter in the embodiment of the present disclosure further includes an inner tube 16, and the wires such as the guide core 13 or the release wire 3 are pre-embedded in the inner tube 16, and the inner tube 16 is used for providing a passage for the wires such as the guide core 13, the release wire 3 or the fixing wire 4 to pass through the sheath 14 and the operation handle 6. In an example of the present disclosure, at least a portion of the second channel 142 may have an inner tube 16 disposed therein, and the inner tube 16 is fixed to the inner wall of the second channel 142 and extends into the operating handle 6 to protect the wire, such as the guide core 13 or the release wire 3.

In order to prevent the resistance of blood in the blood vessel to the restraint member 2 from driving the covered stent 5 to move towards the outer end 11 during the implantation of the stent implantation conveyer, the stent implantation conveyer further comprises a fixing wire 4, the restraint member 2 is detachably fixed on the fixing wire 4, the inner end 12 of the fixing wire 4 is releasably embedded in a guide head 15, and the outer end 11 is movably arranged in a sheath tube 14 and extends to the operating handle 6.

Illustratively, the inner end 12 of the fixation wire 4 may be configured to: when the stent implantation conveyor is implanted into a position, the outer end 11 of the fixing wire 4 is operated, so that the pulling force applied to the fixing wire 4 can enable the inner end 12 of the fixing wire 4 to be separated from the guide head 15. In this way, the fixing wire 4 can limit the axial displacement of the restraint member 2 and the covered stent 5, and can simply release the axial restraint of the restraint member 2 and the covered stent 5, and the structure and the operation process are simple.

Further, the constraining member 2 and the fixing wire 4 are connected together in a plurality of detachable manners, in an example of the present disclosure, as shown in fig. 5, a limiting knot 41 is formed on the fixing wire 4, a limiting ring 22 is disposed on the constraining member 2, the size of the limiting knot 41 is larger than that of the limiting ring 22, the fixing wire 4 is inserted into the limiting ring 22, and the limiting knot 41 is located on a side of the limiting ring 22 away from the guiding head 15. When the constraining member 2 is subjected to outward resistance, the limiting knot 41 can stop the limiting ring 22, so that the axial displacement of the constraining member 2 is limited. When the release wire 3 is subjected to an outward pulling force, the stopper knot 41 of the release wire 3 does not affect the restraining member 2.

If a stent graft 5 having a plurality of branched stents 51 is required, an opening 23 is further formed in the side wall of the constraining member 2, and the opening 23 is used for avoiding the branched stents 51 in the stent graft 5. The opening 23 may be disposed to avoid the slit 21.

Another embodiment of the present disclosure also provides an implantation system comprising an operating handle 6 and a stent implantation transporter as described above, the operating handle 6 interfacing with the outer end 11 of the body 1. The operation of the implant system is as follows:

first, the stent graft 5 is mounted on the mounting portion of the stent graft conveyor, and the outer peripheral surface of the stent graft 5 is covered with the constraining member 2, so that the stent graft 5 is in a radially compressed state.

Then, the inner end 12 of the stent implantation conveyer is implanted into the blood vessel, the guide head 15 and the guide core 13 are advanced along the main guide wire previously implanted into the blood vessel, and the stent graft 5 is conveyed to the position of the lesion blood vessel.

Then, the stent implantation transporter is operated by the operation handle 6, that is: firstly, the release wire 3 is pulled to unlock the radial constraint of the constraint piece 2, so that the covered stent 5 is radially expanded to cut off the diseased blood vessel; secondly, the fixing wire is pulled again to release the axial constraint of the constraint part 2, so that the covered stent 5 is kept in the position of the diseased blood vessel; finally, the guidewire in the branch coating 51 of the stent graft 5 is pulled to position the branch coating 51 along the branch vessel.

Finally, the implant stent transporter is withdrawn outwards, including the withdrawal of the components of the guide head 15, the guide core 13 and the sheath 14, as well as various wires.

The preferred embodiments of the present disclosure are described in detail with reference to the accompanying drawings, however, the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present disclosure within the technical idea of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.

It should be noted that the various features described in the above embodiments may be combined in any suitable manner without departing from the scope of the invention. In order to avoid unnecessary repetition, various possible combinations will not be separately described in this disclosure.

In addition, any combination of various embodiments of the present disclosure may be made, and the same should be considered as the disclosure of the present disclosure, as long as it does not depart from the spirit of the present disclosure.

Claims (10)

1. The utility model provides a conveyer is implanted to support, characterized in that, includes main part (1), restraint piece (2) and release wire (3), main part (1) have be used for outer end (11) that link to each other with operating handle (6) and be used for implanting human inner (12), inner (12) are formed with the installation department that is used for installing tectorial membrane support (5), restraint piece (2) be used for with tectorial membrane support (5) compress to on the installation department, the one end detachably of release wire (3) is connected restraint piece (2), the other end extends to outer end (11) are in order can be external right restraint piece (2) unlock.

2. The stent graft transporter according to claim 1, wherein the restraint member (2) is configured as a restraint film for wrapping the outer peripheral surface of the stent graft (5), and an axially penetrating suture opening (21) is formed in a side wall of the restraint film, and the release wire releasably sutures the suture opening (21) and extends outward so that the restraint film includes a sutured state in which the release wire (3) is sutured and fixed at the suture opening (21), and a disassembled state in which the release wire (3) is released from the suture opening (21) to radially expand the stent graft (5) by an elastic restoring force.

3. The stenting conveyor of claim 1, wherein the body (1) further comprises a guide head (15), a guide core (13) and a sheath (14), the guide head (15) being fixed at the inner end (12) of the guide core (13), the sheath (14) and the guide head (15) being spaced along the guide core (13) such that a section of the guide core (13) between the guide head (15) and the sheath (14) is configured as the mounting portion.

4. A stent implantation transporter according to claim 3, wherein the guide head (15) has a first through hole formed therein and the guide core (13) has a second through hole formed therein, the first and second through holes being adapted to allow a main guide wire preset in the body to pass therethrough.

5. A stent implantation transporter according to claim 3, wherein the restraint (2) is capable of compressing the stent graft (5) to a diameter no greater than the diameter of the sheath (14).

6. The stent implantation transporter according to claim 3, further comprising a fixation wire (4), the restraint (2) being detachably fixed on the fixation wire (4), an inner end (12) of the fixation wire (4) being releasably embedded in the guide head (15), an outer end (11) being movably inserted in the sheath (14) and extending to the operating handle (6).

7. The stent implantation transporter according to claim 6, wherein a stop knot (41) is formed on the fixing wire (4), a stop ring (22) is arranged on the restraint member (2), the stop knot (41) has a size larger than that of the stop ring (22), the fixing wire (4) is inserted into the stop ring (22), and the stop knot (41) is located on a side of the stop ring (22) away from the guide head (15).

8. The stent graft transporter according to claim 2, wherein an opening (23) is further formed on a side wall of the constraining membrane, the opening (23) being used for avoiding a branch coating (51) in the stent graft (5).

9. The stent implantation transporter according to claim 6, further comprising a plurality of inner tubes (16), each inner tube (16) for providing a passage for the release wire (3) or the fixation wire (4), respectively, through the sheath (14).

10. An implantation system, characterized in that the implantation system comprises an operating handle (6) and a stent implantation transporter according to any of claims 1-9, the operating handle (6) interfacing with the outer end (11) of the body.

Images