WO2018121362A1

WO2018121362A1 - Interventional medical system, delivery device and implantable medical apparatus

Info

Publication number: WO2018121362A1
Application number: PCT/CN2017/117287
Authority: WO
Inventors: 李思漪; 李安宁
Original assignee: 先健科技(深圳)有限公司
Priority date: 2016-12-30
Filing date: 2017-12-19
Publication date: 2018-07-05
Also published as: CN108261213A; CN108261213B

Abstract

An interventional medical system (10, 10a, 10c), comprising: an apparatus (110, 110a, 110c) provided with a female coupling part (120, 120a, 120c), and a hollow delivery body (200, 200a, 200c) provided with a male coupling part (211). The interventional medical system (10, 10a, 10c) also comprises an expansion member (300, 300a, 300c) movably provided in an inner cavity of the delivery body (200, 200a, 200c). The male coupling part (211) comprises at least one coupling tab (215, 215a, 215c) extending generally toward a longitudinal central axis of the male coupling part (211). The coupling tab (215, 215a, 215c) is elastic. The coupling tab (215, 215a, 215c) of the male coupling part (211) is coupled to the female coupling part (120, 120a, 120c) while expanded under an outward radial force provided by the expansion member (300, 300a, 300c), so that the female coupling part (120, 120a, 120c) is connected to the male coupling part (211). When the expansion member (300, 300a, 300c) moves relative to the delivery body (200, 200a, 200c) so as to stop radially expanding the coupling tab (215, 215a, 215c), the coupling tab (215, 215a, 215c) disengages from the female coupling part (120, 120a, 120c) so that the apparatus (110, 110a, 110c) separates from the delivery body (200, 200a, 200c). The interventional medical system (10, 10a, 10c) provides a more robust and convenient way to connect the implantable medical apparatus (110, 110a, 110c) and a delivery device (500), ensuring normal release of the implantable medical apparatus (110, 110a, 110c) and reducing surgical risks.

Description

Title of Invention: Interventional Medical Systems, Conveying Devices, and Implanted Medical Devices

The present invention relates to the field of interventional medical devices, and more particularly to an implantable medical device placed at a selected portion of a human body, a delivery device for delivering the implanted medical device to the selected portion, and the implanted medical device And interventional medical systems for delivery devices. Background technique

Interventional therapy refers to a means of treating diseases by catheter-transporting materials, medical devices, and drugs to the treatment site under the guidance of a medical imaging device. At present, interventional therapy has become one of the three modern medical treatment methods along with traditional medical treatment and surgical treatment. Cardiac and vascular disorders are the most widely used areas of interventional therapy.

Compared with traditional medical treatment, interventional treatment has achieved the clinical effect that can not be achieved by previous medical treatment, and in some cases has the tendency to replace surgery. For example, radiofrequency ablation for paroxysmal supraventricular tachycardia, atrial fibrillation, atrial flutter, various premature beats, ventricular tachycardia; occlusion device for congenital heart disease, arterial catheterization, II hole central atrial septal defect, Balloon dilatation for the treatment of mitral stenosis and pulmonary stenosis, stent implantation for coronary heart disease and various vascular stenosis, pacemaker treatment of bradycardia, prevention of sudden death, treatment of heart failure, etc., some diseases can completely cure Effect. The aforementioned diseases are no longer simply treated with traditional drugs and surgery. Compared with surgery, interventional therapy has the following outstanding advantages: (1) less trauma and less pain. Since the surgery is not performed, the surgery is performed only through a catheter of 2 to 3 mm thickness, so the trauma is small. (2) Recovery is fast. It is because of the small trauma that the patient recovers quickly after surgery. Usually, patients with cardiovascular disease intervention can get out of bed 24 hours after surgery, and they can take care of themselves in daily life. (3) Good and safe. Because the interventional treatment does not open the knife, there is no need for general anesthesia, no healing of the wound, etc., thus avoiding many complications often encountered during surgery and after surgery, and the safety is greatly improved. (4) A desire to conform to the requirements of modern people. Since the operation is not performed, the wound is not left behind after the treatment, so it is not visible on the outside after the interventional treatment. This is especially suitable for children, women and industry practitioners who have high requirements on appearance and appearance. It can be seen that the application of percutaneous interventional techniques for the treatment of diseases is becoming more and more extensive. Usually, catheter intervention is used to place a variety of materials, instruments and drugs into the heart, arteries, veins, trachea and bronchus of the human body. system. For example, a valve repair device, a cardiac defect occluder, a vascular plug, a vascular filter, a lung volume reduction device, etc., can be placed at a selected location by interventional therapy.

In the current interventional treatment, a threaded connection is usually used to achieve the connection between the interventional medical device and the delivery body. According to the direction of rotation of the thread, the thread can be divided into a left-hand thread and a right-hand thread. When the implanted medical device and the transport body include a right-handed thread, the transport body is rotated clockwise, and the implanted medical device is coupled to the transport body. To release the connection between the two, the transport body is rotated counterclockwise. However, due to the complexity of the human body structure such as the heart, arteriovenous vasculature, and bronchial system, the implanted medical device is pushed into the designated area of the human body, and the push-pull, bend, and twist between the implanted medical device and the transport body may occur. Etc. During the process of transporting the medical device to the designated area of the human body, when the counter-clockwise rotation occurs between the medical device and the transport body, the meshing portion of the threaded connection region between the implanted medical device and the transport body is reduced, so that the implanted medical device reaches the human body. There is a risk of falling off before the designated area; when a clockwise twist occurs between the medical device and the transport body, the meshing portion of the threaded connection area between the implanted medical device and the transport body increases, even because the engagement is too tight, between the internal and external threads The friction exceeds a certain threshold, and it is difficult for the implanted medical device and the transport body to be separated during the subsequent release process, resulting in a surgical failure. Both of these conditions can cause harm to patients and increase the risk of surgery. Summary of the invention

Based on this, it is necessary to provide an interventional medical interventional medical system, an interventional medical device, and an interventional medical device delivery device in view of the connection problem between the medical device and the end of the delivery body in the prior art.

An interventional medical system provided by the present invention includes an instrument provided with a snap portion and a hollow transport body provided with a card head, wherein the interventional medical system further comprises a movable passage through the transport An expansion member of the body lumen; the card head including at least one card extending generally toward a longitudinal central axis of the card head, the card having elasticity, expansion of a radially outward force of the expansion member Actingly, the card of the card head is engaged with the carding portion, such that the carding portion is connected to the card head, and when the expansion member moves relative to the conveying body, it is no longer radially expanded. When the card is The card is ejected from the snap portion to separate the instrument from the transport body.

In one embodiment, the number of cards of the card head is plural, and the plurality of cards are evenly distributed along the circumference of the card head.

In one embodiment, the latching portion is provided with at least one latching slot. When the latching portion is connected to the latching portion, at least the latching header is received in the latching slot of the latching portion. At least one card.

In an embodiment, the engaging groove of the engaging portion extends in the axial direction of the engaging portion.

In one embodiment, the engaging portion includes at least one hollow tube having a proximal opening, the proximal lumen of the hollow tube forming a snap groove of the engaging portion, and an inner wall of the engaging groove Provided with a first flange extending toward a central axis of the hollow tube, the outer wall of the card of the card head being provided with a second ledge extending away from a longitudinal central axis of the card head, a second protruding edge is inserted into the engaging groove of the engaging portion, and the second protruding edge is engaged with the first protruding edge under the expansion of the radially outward force of the expanding member , the snap portion is connected to the card head.

In one embodiment, the engaging portion includes a plurality of spaced apart locking pieces, and the engaging groove of the engaging portion is located between two adjacent locking pieces of the engaging portion. Inserting at least one card of the card head into at least one snap groove of the latching portion to cause the latching portion and the chucking head under the expansion of the radially outward force of the expanding member Connected to the department.

In one embodiment, the length of the proximal end of the engaging groove of the engaging portion in the circumferential direction of the engaging portion is smaller than the length of the distal end thereof in the circumferential direction of the engaging portion.

In one embodiment, the proximal end of the latching tab of the latching portion has a length along the circumferential direction of the latching portion that is greater than a length of the distal end thereof along the circumferential direction of the latching portion.

In one embodiment, the engaging portion includes a body segment, and the locking piece of the engaging portion is disposed on a proximal end surface of the body segment.

In one embodiment, the locking piece of the main body segment and the engaging portion is an integral structure formed by cutting the same hollow tube.

The invention provides a conveying device, wherein the engaging groove of the engaging portion comprises a τ-type structure, and a maximum length of the distal end of the T-shaped structure in a circumferential direction of the engaging portion is greater than a proximal end of the τ-shaped structure The minimum length in the circumferential direction of the snap portion.

In one embodiment, the card includes a τ-type sheet, and the card distal end is circumferentially along the card head The maximum length of the card is greater than the minimum length of the proximal end of the card along the circumferential direction of the card head. When the card head is connected to the carding portion, the radial outward force expansion of the expansion member Under the action, the τ-type card is stuck in the snap groove of the τ-type structure.

In one embodiment, the outer sheath is further provided with a protective sheath, and the protective sheath is recessed from the distal end to the proximal end to form a receiving groove, and the minimum diameter of the inner cavity of the receiving slot is greater than or equal to the snapping Outer Diameter When the transport body and the instrument are connected by the expansion member, the receiving groove accommodates the connection between the card head and the implanted medical device.

The present invention provides an implanted medical device, wherein the engaging portion is provided with at least one engaging groove, and the engaging groove of the engaging portion extends along the axial direction of the engaging portion, and the engaging portion includes At least one hollow tube having a distal opening, the proximal lumen of the hollow tube forming a snap groove of the engaging portion, and the inner wall of the engaging groove is provided with at least one longitudinal central axis toward the engaging groove The first convex edge extending in the direction.

In one embodiment, the first ledge is located at a proximal end of the snap slot.

In one embodiment, the number of the first rims is one, and the first rim is an annular structure that is coaxial with the longitudinal center axis of the hollow tube.

The invention provides a delivery device for implanting a medical device, comprising a transport body, the transport body comprising a card head detachably connected to the implanted medical device, wherein the transport device further comprises a movable wearable An expansion member disposed in the delivery body cavity, the card head including at least one card extending from a proximal end to a distal end substantially toward a longitudinal central axis of the card head, the card having elasticity, the card being The expansion member expands under the action of a radially outward force and restores shape as the expansion member moves relative to the delivery body until the card is no longer radially expanded.

In one embodiment, the number of cards of the card head is plural, and the cards of the plurality of card heads are spaced apart from each other.

In one embodiment, the card includes a τ-type sheet, and the length of the distal end thereof along the circumference of the card head is the maximum length of the card along the circumference of the card head.

In one embodiment, the card is uniform in thickness.

In one embodiment, the outer wall of the card distal end of the card head is provided with a second ledge extending away from the longitudinal central axis of the card head.

In one embodiment, the transport body jacket is provided with a protective sheath, the protective sheath A receiving groove is formed from the distal end to the proximal end, and the protective sheath surrounds the card head.

The interventional medical system provided by the technical solution of the present invention provides a movable expansion member in the conveying body. In a natural state, at least one card of the card head is in a gathered state, and is inserted into the engaging groove of the engaging portion. By moving the expansion member, the plurality of cards are engaged with the engaging portion under the radial expansion of the expanding member, thereby completing the connection between the instrument and the conveying body. Compared with the prior art, the present invention completely avoids the use of a threaded connection to connect the implanted medical device and the transport body, ensuring the normal release of the implanted medical device and reducing the risk of surgery. Further, after the device is connected with the transport body, since the expansion member is kept at the current position, the fastening of the device to the transport body during the operation can be ensured, and when the device and the transport body are connected, The card slot of the card engaging portion is larger, and the card of the card head is in a gathered state, so that the card is more conveniently and easily inserted into the engaging slot of the engaging portion without being completely aligned. Simplifies the alignment operation. In the separation, it is only necessary to withdraw the expansion member from the transport body to leave the card, so that the card can be separated from the card slot, thereby completing the separation of the instrument from the transport device, and the operation is more convenient. DRAWINGS

1 is a schematic view showing a display effect according to an embodiment of the present invention;

2 is a schematic structural view of an interventional medical system according to an embodiment of the present invention;

3 is a schematic structural view of a snap-fit portion of an implanted medical device of the interventional medical system of FIG. 2; FIG. 4 is a schematic view of another angle of the snap-fit portion of FIG.

Figure 5 is a schematic view showing the structure of the transport body of the implanted medical device device of Figure 2;

6 is a schematic view showing a state in which the expansion member of the interventional medical system of FIG. 2 is gradually extended to the delivery body; FIG. 7 is a schematic view showing the connection state between the implanted medical device and the delivery body of the interventional medical system of FIG. 2;

Figure 8 is a cross-sectional view along line AA and line BB of the interventional medical system of Figure 7; Figure 9 is a view of the implanted medical device and the transport body in the interventional medical system of Figure 7 in a direction perpendicular to the longitudinal center axis of the transport body a schematic view of the projection on the upper section;

FIG. 10 is a schematic structural diagram of an interventional medical system according to another embodiment of the present invention; FIG.

Figure 11 is an exploded perspective view of the interventional medical system of Figure 10; Figure 12 is a schematic view showing the connection state between the implanted medical device and the transport body of the interventional medical system of Figure 10;

13 is a schematic structural view of a snap portion of the interventional medical system of FIG. 10;

Figure 14 is a schematic cross-sectional view of the interventional medical system A-A of Figure 12;

Figure 15 is a schematic cross-sectional view of the interventional medical system B-B of Figure 12;

Figure 16 is a schematic illustration of the projection of the implanted medical device and the transport body in the cross-sectional direction perpendicular to the longitudinal central axis of the transport body in the interventional medical system of Figure 12;

17 is a schematic structural diagram of an interventional medical system according to still another embodiment of the present invention;

Figure 18 is an exploded perspective view of the interventional medical system shown in Figure 17;

Fig. 19 is a view showing the state of connection between the implanted medical device and the transport body of the interventional medical system shown in Fig. 17.

LIST OF REFERENCE NUMERALS: interventional medical system-10, instrument-110, transport body-200, card head-211, catheter-201, delivery device-500, snap-on-120, expansion member-300, body segment-121, Locking tab -123, snap groove -125, cable segment -203, card -215. detailed description

The above described objects, features and advantages of the present invention will become more apparent from the aspects of the appended claims. Numerous specific details are set forth in the description which follows to facilitate a thorough understanding of the invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art can make similar modifications without departing from the scope of the invention, and thus the present invention is not limited by the specific embodiments disclosed below.

It should be noted that when an element is referred to as being "fixed" to another element, it can be directly on the other element or the element can be present. When an element is considered to be "connected" to another element, it can be directly connected to the other element or. In the field of intervention, the end near the operator is usually referred to as the proximal end, and the end far from the operator is referred to as the distal end.

It should be noted that the interventional medical device according to the present embodiment includes a medical device main body portion and a catching portion connected to the medical device main body portion. The medical device body portion is a portion of the interventional medical device for implementing a medical function, and the carding portion is a portion of the interventional medical device for connection with the transport body. Unless otherwise defined, all technical and scientific terms used herein have the same meaning meaning meaning The terminology used in the description of the present invention is for the purpose of describing particular embodiments and is not intended to limit the invention. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

Implementations of the present invention are for use in an interventional medical device, as shown in Figure 1, which includes at least an interventional medical system 10. The interventional medical system 10 includes an implanted medical device 110 for transporting the delivery body 200 of the implanted medical device 110. The implanted medical device 110 is typically coupled to the card head 211 of the delivery body 200 and placed within the catheter 201 for movement within the patient's tissue cavity 101 until the delivery body 200 and implanted medical device are removed after being in a selected position. The connection between the 110s places the implanted medical device 110 into a selected location for minimally invasive treatment. The tissue cavity 101 can be a cavity formed by the tissue wall 102. For example, the tissue cavity 101 includes a blood vessel cavity, a intestinal lumen, a heart chamber, and a trachea. Of course, the tissue cavity 101 can also include a human body that can be reached by current interventional therapy. The internal chambers of each tissue within the organization, as well as any tissue within the body tissue that can be reached by future interventional treatment. The implantable medical device 110 referred to herein may be any medical device for interventional therapy, such as a cardiac defect occluder, a valve repair device, a vascular plug, a thrombus filter, a lung volume reduction device, and the like. The delivery body 200 is an elongate object for interventional therapy, such as a steel cable or the like, the distal end of which is intended to be coupled to the implanted medical device 110. The far end here refers to the farthest end from the operator in Figure 1, and the relatively near end is the end closest to the operation.

In order to avoid the problem that the implanted medical device 110 is difficult to release to the correct selected position due to the connection problem between the implanted medical device 110 and the transport body 200, and the medical risk factor is increased, in the embodiment of the present invention, The interventional medical system 10 has been improved. Specific improvements in conjunction with the drawings are described below.

An embodiment of the present invention provides an interventional medical treatment system 10.

Referring to FIG. 2, the interventional medical system 10 includes an implanted medical device 110 and a delivery device 500. The instrument 110 includes a snap portion 120 that is located on the implanted medical device 110. The transport device 500 includes a transport body 200 and an expander 300 that is disposed through the transport body 200 and that is axially movable relative to the transport body 200. The conveying body 200 includes a chuck portion 211 in which the distal ends are close to each other in a natural state (in a state free from an external force). When the distal end of the expansion member is moved to the distal end of the card head 211, the expansion member can expand the card head portion 211. Referring to FIG. 3 and FIG. 4 together, the engaging portion 120 includes a hollow main body segment 121 and at least two locking pieces 123 circumferentially spaced along the main body segment 121. In the circumferential direction of the engaging portion 120, a latching groove 125 is formed between the adjacent two first locking pieces 123. Each of the engaging grooves 125 penetrates the proximal end surface of the engaging portion 120, and the length of the proximal end thereof in the circumferential direction of the engaging portion 120 is smaller than the length of the distal end thereof in the circumferential direction of the engaging portion 120.

In this embodiment, the number of the locking pieces 123 is two, and the two locking pieces 123 are disposed on the proximal end surface of the main body segment 121. Each of the locking pieces 123 is a T-shaped piece, and the distal end thereof The circumferential length of the engaging portion 120 is the minimum length of the locking piece 123 in the circumferential direction of the engaging portion 120. Thus, in the circumferential direction of the engaging portion 120, two T-shaped engaging grooves 125 are formed between the two locking pieces 123. Preferably, in the embodiment, the main body segment 121 and the two locking pieces 123 are an integral structure formed by cutting the same hollow nickel-titanium tube. It can be understood that the material of the main body segment 121 and the two locking pieces 123 may also be metal materials commonly used for implanting medical instruments such as stainless steel or cobalt chromium alloy. It can also be understood that the two locking pieces 123 can also achieve the same effect by other machining methods, such as wire cutting, powder metallurgy, casting, and the like. It can be understood that the shape of the engaging groove 125 can be other shapes such as an L shape or a C shape, and can be designed as needed.

Referring to Figure 5, the card head 211 of the transport body 200 includes a cable segment 203 and at least two cards 215 circumferentially spaced along the cable segment 203. At least two of the cards 215 are elastic and can be switched between a contracted state and an expanded state, that is, each of the cards 215 can be radially outwardly expanded (ie, expanded) under the action of a radially outward external force. When the external force is revoked, each card 215 can be restored to a natural state (ie, a contracted state). The thickness of each of the cards 215 is uniform, and each of the cards 215 extends from the proximal end to the distal end substantially in a direction toward the longitudinal center axis of the card head 211. In the present invention, each of the cards 215 extends from the proximal end to the distal end substantially toward the longitudinal central axis of the card head 211, meaning that each card 215 extends from the proximal end to the distal end toward the longitudinal central axis of the card head 211. At the same time, some parts of each card 215 are allowed to be slightly away from the central axis of the card head 211 than the adjacent portions thereof. As long as the radial expansion of the expansion member 300, each card 215 can be at least partially received in the card slot. In the 125, the implanted medical device 110 can be integrated with the transport body 200.

In this embodiment, the number of the cards 215 is two, and the two cards 215 are disposed on the distal end surface of the cable segment 203. Each card 215 is a T-shaped piece, and the distal end thereof is along the card head 211. The circumferential length is the maximum length of the card 215 along the circumference of the card head 211. So, when the two cards 215 are in a natural state At the time of the circumferential direction of the card head 211, a substantially conical cavity is formed between the two cards 215, and the radial length of the cavity from the distal end to the proximal end is gradually increased. Preferably, in this embodiment, the cable segment 203 and the two cards 215 are integrally formed by cutting and heat setting the same hollow nickel-titanium tube; it can be understood that, in other embodiments, the card 215 and The cable segments 203 can also be separately formed separately and then joined together by means of splicing, bonding or screwing. It is also understood that the card 215 can also be made of other metal materials such as cobalt chrome or the like which are preferably elastic.

It can be understood that, in other embodiments, the shape of the engaging groove may be other shapes such as a cross type and an I-shaped shape. In this case, the length of the proximal end of the engaging groove in the circumferential direction of the engaging portion is greater than or equal to a card whose distal end is in the circumferential direction of the engaging portion, and each card whose shape matches the shape of the engaging groove can still be accommodated in a corresponding one of the engaging grooves under the expansion of the expanding member, so as to be The snap portion is coupled to the card head.

Referring to FIG. 6 and FIG. 7 together, the expansion member 300 is a solid columnar structure, and the end portion is designed as a circular arc shape, which is made of a metal material with good elasticity such as nickel-titanium alloy, cobalt-chromium alloy, etc. It is disposed in the transport body 200 and is movable in the axial direction relative to the transport body 200. When the distal end of the expansion member 300 in the transport body 200 is axially moved relative to the transport body 200 toward the distal end of the transport body 200 and the two cards 215 are not touched, the two cards 215 are in a state of being close to each other in a natural state ( As shown by 1 in FIG. 6); when the expansion member 300 penetrates from the proximal end of its two cards 215 into the tapered cavity formed therein, the expansion member 300 applies a radial direction to the radial direction of the two cards 215. The external expansion force can separate the two cards 215 from each other at the distal end (as shown by 2 in FIG. 6 ), so that they are received in the corresponding engaging slots 125 and are engaged with them ( As shown in FIG. 7; since the expansion member 300 can be kept in the position of FIG. 7, the card 215 which is close to each other can be continuously ensured to be in an expanded and separated state, thereby effectively ensuring that the card 215 is stuck in the engagement slot. In 125, the secure connection of the instrument 110 to the transport body 200 is completed. It will be appreciated that in other embodiments, the expansion member 300 can also be an elongated hollow tubular structure.

In the implanted medical device 110 of the present embodiment, when the engaging portion 120 is coupled to the card head portion 211, a card 215 is snapped into a latching groove 125 under the radial expansion of the expanding member 300, when the expanding member 300 is opposite When the transport body 200 moves away from the instrument 110 (ie, the proximal end of the transport body 200) until the card 215 has no expansion force, the card 215 returns to the natural state, and the distal ends of the card 215 are close to each other, and are ejected from the snap slot 125. The instrument 110 is separated from the transport body 200. In this way, the adoption is completely avoided. The means of threaded connection to the instrument 110 and the delivery body 200 ensures proper release of the instrument 110 and reduces medical risks. In addition, during the release process, only the expansion member 300 is required to move away from the instrument 110 to the card 215 and ejected from the card slot 125. The operation process is also simple, shortening the operation time and reducing the patient's condition. Surgical risk.

It can be understood that, in other embodiments, the number of the card 215 or the latching slot 125 may also be one, as long as the card 215 is at least partially received by the card under the action of the radially outward force of the expanding member 300. The implanted medical device 110 can be connected to the transport body 200 in the socket 125. It can also be understood that, in other embodiments, under the action of the radially outward force of the expansion member 300, two or more cards 215 can be accommodated in each of the engagement slots 125, as long as the implant can be implanted. The medical device 110 is connected to the transport body 200. For example, two or more cards 215 are abutted against the slot wall of one of the latching slots 125 or are retained in a latching slot 125.

Referring to FIG. 7, FIG. 8 and FIG. 9, when the conveying body and the instrument are kept connected, the AA section and the BB section as shown in FIG. 7 are intercepted, and in the AA section, the width of the card 215 is L1, the card is The width of the connecting portion 120 is L2; in the BB cross section, the width of the card 215 is L1 ', and the width of the engaging portion 120 is L2 ', wherein the length of L1 is greater than the length of L1 ', and L2 is greater than the length of L2 ', so When the expansion member 300 is held in the position shown in Fig. 7, the card 215 and the engaging portion 120 are in a state of being engaged. Referring to Figure 9, when the expansion member 300 is held in the position shown in Figure 7, the instrument is engaged in the projection of the transport body in the cross section perpendicular to the longitudinal central axis of the transport body. The portion 120 has a coincident portion C with the card head portion 211 of the transport body, and the width of the single projection coincidence portion C is L3, and the presence of the coincident portion C enables the instrument and the transport body to remain connected.

Referring to FIG. 10, an interventional medical system 10a according to another embodiment of the present invention is substantially the same as the interventional medical system 10, and includes an interventional medical device 110a, a hollow delivery body 200a, and a delivery body 200a and can be transported relative to each other. The body 200a is an axially movable expansion member 300a.

Referring to Figures 10, 11, 12 and 13, the latching portion 120a of the device 110a includes a hollow tube 123a at least proximally open, and the lumen of the hollow tube 123a constitutes a latching slot of the engaging portion 120a. 125a, the inner wall of the proximal slot of the snap groove 125a is provided with at least one first flange 127a extending toward the longitudinal center snap groove axis direction of the hollow tube 123a. Each of the cards 215a of the card head is inserted into the engaging groove 125a of the engaging portion under the radially outward expansion of the expanding member 300a, and The first flange 127a is engaged such that the snap portion 120a is coupled to the card 215a of the card head. In this embodiment, the hollow tube 123a and the first protruding edge 127a thereon are integrally formed. It can be understood that the hollow tube 123a and the first protruding edge 127a thereon can also be integrally fixed by other connecting methods such as bonding, screwing, and the like. Preferably, the engaging portion 120a can be integrally formed. For example, a whole piece of material can be processed into the engaging portion 120a by machining, such as turning, milling, drilling, grinding, etc., and other forming methods (such as powder metallurgy, casting) can be used. And so on) the engaging portion 120a is formed.

It will be appreciated that in other embodiments, when the first ledge is one, the first ledge is an annular structure that is coaxial with the longitudinal center axis of the hollow tube.

The conveying body 200a is substantially the same as the conveying body 200, except that the outer peripheral wall of the distal end of the disc 215a of the conveying body 200a is provided with a second projection 217a extending away from the longitudinal central axis.

Referring to FIG. 11 and FIG. 12 together, in the embodiment, when the connection is made, the distal end of the card 215a of the transport body naturally closes toward the longitudinal central axis of the transport body in a natural state, thereby ensuring the card of the transport body as a whole. 215a has a radial length that increases from the distal end to the proximal end. When the transport body is connected to the instrument, the distal end of the card 215a is first inserted into the latching slot of the instrument latching portion 110a. Since the distal card 215a is close to each other, there is no latching with the instrument latching portion 110a. The effect is that the distal end of the expansion member 200a is pushed toward the engaging portion 110a of the instrument. When the distal end of the expanding member 200a touches the card 215a, the card 215a can be radially outwardly expanded, that is, the original close-up The distal end of the card 215a is separated until the originally folded card 215a is expanded to a state parallel to the longitudinal central axis of the transport body 200a, and the card 215a remains in this state under the action of the expansion member 200a. Since the distal end of the card 215a of the card head is provided with the second protruding edge 217a, and the engaging groove 125 is provided with the first protruding edge 127a, the card 215a of the card head is inserted into the card of the engaging portion 110a. In the receiving groove, the second protruding edge 217a is engaged with the first protruding edge 127a under the radial expansion of the expanding member 200a. At this time, in the axial direction of the instrument and the transport body, the first convex edge 127a is engaged with the second convex edge 217a, so that the instrument and the transport body can be firmly connected. It can be understood that, in other embodiments, the first protruding edge 127a may be disposed at a position other than the proximal notch of the engaging groove 125a of the inner wall of the engaging groove 125a as long as it can be engaged with the second protruding edge 217a. Just pick it up. It can also be understood that in other embodiments, the second protruding edge 217a may also be disposed at a position other than the outer wall of the outer wall of the card 215a except for the outer wall of the card 215a, as long as it can be engaged with the first protruding edge 127a. Just fine. It can also be understood that, in other embodiments, When the number of the first convex edges 127a is one, the first convex edge 127a may be a hollow annular structure whose central axis parallel to the longitudinal central axis of the hollow tube 123a is coaxial or non-coaxial with the hollow tube 123a.

Referring to FIG. 14, FIG. 15 and FIG. 16, when the conveying body and the instrument are kept connected, the AA section and the BB section as shown in FIG. 12 are intercepted, and in the AA section, D1 is the inner diameter of the card 215a, D2. The outer diameter of the card 215a, D3 is the inner diameter of the instrument engagement portion 110a, and D4 is the outer diameter of the instrument engagement portion 110a. In the BB cross section, D1' is the inner diameter of the card 215a, and D2' is the outer diameter of the card 215a. D3, which is the inner diameter of the instrument engagement portion 110a, D4' is the outer diameter of the instrument engagement portion 110a, referring to Fig. 16, when the instrument and the connector are in the state shown in Fig. 12, since the length of D2 is greater than the length of D3' In the projection of the cross-section of the transport body and the transport body perpendicular to the longitudinal central axis of the transport body, the snap portion 110a of the instrument and the card 215a of the transport body have a coincident portion D, and the width of the single projection coincidence portion D is D5. Due to the presence of the coincident portion D, the instrument and the transport body can remain connected.

The expansion member 300a is substantially the same as the expansion member 300, except that the thickness and size of the expansion member 300d may be different from the thickness and size of the expansion member 300 according to actual needs, and will not be described herein.

It can be understood that, in other embodiments, the number of cards 215a may also be one (as in the two cards 215a in this embodiment, one card 215a is omitted), as long as the expansion of the expansion member is under the card. The distal end of the 215a can be away from the longitudinal central axis of the transport body and can extend into the snap groove of the snap portion of the instrument. Under the contact of the expansion member, the card 215a can be engaged with the snap portion, thereby implanting The medical device can be connected to the transport body.

Referring to FIG. 17, FIG. 18 and FIG. 19, an interventional medical system 10c according to another embodiment of the present invention is substantially the same as the interventional medical system 10b, and includes an implanted medical device 110c having a snap portion 120c, which is hollow. The transport body 200c and the extender 300c that is disposed in the transport body 200c and that is axially movable relative to the transport body 200c.

The conveying body 200c is substantially the same as the conveying body 200, except that in the present embodiment, a hollow protective sheath 400c is also sleeved on the outer wall of the conveying body 200c. The distal end of the protective sheath 400c is recessed toward the proximal end to form a receiving groove 41c. The minimum radial length of the inner cavity of the receiving groove 41c is greater than or equal to the outer diameter of the engaging portion 120c. The protective sheath 400c is made of a metal material or a plastic material commonly used in interventional surgery, and the proximal end of the protective sheath 400c is attached to the outer wall of the transport body 200c. One end of the protective sheath 400c may be connected to the outer wall of the transport body 200c by other connection means. No specific restrictions are made. The distal end of the protective sheath 400c is more card The distal end of the head is away from the proximal end of the transport body 200c, and the card 215c of the card head is partially or completely covered. When the transport body 200c is coupled to the engaging portion 120c, the card 215c extends into the slot of the instrument engaging portion 120c, and the protective sheath 400c can cover the proximal end of the engaging portion 120c with the insertion of the card 215c. Thereby covering the entire delivery body 200c with the implanted medical device 110c (ie, when the delivery body 200c is coupled to the implanted medical device under the action of the expansion member 300c, the receiving slot 41c accommodates the connection between the card engaging portion 120c and the card 215c).

The purpose of providing the protective sheath 400c is that, when the instrument 110c is coupled to the transport body 200c, the interventional system 10c in which the instrument 110c and the transport body 200c are connected during the implantation process is bent, and the hardness is set outside the joint. When the sheath 400c is protected, during the implantation process, due to the presence of the protective sheath 400c, the position where the instrument 110c is connected to the transport body 200c is less likely to be bent, so that the expansion member 300c can be evacuated from the transport body 200c. The difficulty of improving the safety and effectiveness of the operation.

It will be understood that in other embodiments, the thickness and size of the various components of the transport body 200c may be different from the respective components of the transport body 200, depending on the actual needs.

The expansion member 300c is substantially the same as the expansion member 300b, except that the thickness and size of the expansion member 300c may be different from the thickness and size of the expansion member 300b according to actual needs, and will not be described herein.

It can be understood that, in other embodiments, the number of the card 215c or the engaging groove 125c may also be one. As long as the radial expansion of the expanding member 300c, the card 215c can be engaged with the engaging portion 120c to be implanted. The medical device 110c can be connected to the transport body 200c. It can also be understood that, in other embodiments, under the radial constraint of the expansion member 300c, two or more cards 215c can be accommodated in each of the engagement slots 125c, as long as the implantable medical device 110c can be transported. The body 200c can be connected.

It can be understood that, in other embodiments, a hollow protective sheath may be sleeved on the outer wall of the conveying body, in this case, as long as the minimum diameter of the inner cavity of the receiving groove of the protective sheath from the distal end to the proximal end is recessed. The purpose of protecting the sheath can also be achieved by a radial length greater than or equal to the outer diameter of the snap portion and the distal end of the protective sheath being distal from the proximal end of the transport body.

The technical features of the above-described embodiments may be arbitrarily combined. For the sake of brevity of description, all possible combinations of the technical features in the above embodiments are not described. However, as long as there is no contradiction between the combinations of these technical features, All should be considered as the scope of this manual.

The above described embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed. However, it cannot be construed as limiting the scope of the invention patent. It should be noted that a number of variations and modifications may be made by those skilled in the art without departing from the spirit and scope of the invention. Therefore, the scope of the invention should be determined by the appended claims.

Claims

Claim

What is claimed is: 1. An interventional medical system comprising: a device having a snap portion and a transport body having a card head, wherein the interventional medical system further comprises an expansion movably disposed through the delivery body lumen The card head includes at least one card extending substantially toward a longitudinal central axis of the card head, the card having elasticity, under the expansion of the radially outward force of the expansion member, a card of the card head is engaged with the carding portion such that the carding portion is coupled to the card head, and when the expansion member is moved relative to the transport body until the card is no longer radially expanded The card is ejected from the snap portion to separate the instrument from the transport body.

The interventional medical system according to claim 1, wherein the number of cards of the card head is plural, and the plurality of cards are distributed along the circumferential direction of the card head.

The interventional medical system according to claim 1, wherein the engaging portion is provided with at least one snap groove, and when the snap portion is connected to the card head, the card of the snap portion At least one card of the card head is accommodated in the socket.

The interventional medical system according to claim 3, wherein the engaging groove of the engaging portion extends in the axial direction of the engaging portion.

The interventional medical system according to claim 4, wherein the engaging portion comprises at least one hollow tube having a proximal opening, and the proximal lumen of the hollow tube constitutes the engaging portion a card slot, the inner wall of the card slot is provided with a first protruding edge extending toward a central axis of the hollow tube, and an outer wall of the card of the card head is disposed away from the card head a second protruding edge extending from the longitudinal central axis, the second protruding edge being inserted into the engaging groove of the engaging portion, under the expansion of the radially outward force of the expanding member, the second The convex edge is engaged with the first convex edge such that the engaging portion is connected to the card head.

The interventional medical system according to claim 4, wherein the engaging portion comprises a plurality of interlocking locking pieces, and the engaging groove of the engaging portion is located at the engaging portion Between two adjacent locking pieces, at least one card of the card head is inserted into at least one engaging groove of the engaging portion under the expansion of the radial outward force of the expanding member The card joint is connected to the card head.

The interventional medical system according to any one of claims 5-6, wherein the engaging portion The length of the proximal end of the snap groove in the circumferential direction of the engaging portion is smaller than the length of the distal end thereof in the circumferential direction of the engaging portion.

The interventional medical system according to claim 6, wherein a length of the proximal end of the locking piece of the engaging portion along the circumferential direction of the engaging portion is greater than a circumference of the locking portion thereof along the distal end of the engaging portion The length of the direction.

The interventional medical system according to claim 8, wherein the engaging portion comprises a main body segment, and the locking piece of the engaging portion is disposed on a proximal end surface of the main body segment.

The interventional medical system according to claim 9, wherein the locking piece of the main body segment and the engaging portion is an integral structure formed by cutting the same hollow tube.

The interventional medical system according to claim 6, wherein the engaging groove of the engaging portion comprises a T-shaped structure, and a maximum length of the distal end of the T-shaped structure in the circumferential direction of the engaging portion A length greater than a minimum length of the proximal end of the T-shaped structure in the circumferential direction of the engaging portion.

The interventional medical system according to claim 11, wherein the card comprises a T-shaped piece, and a maximum length of the distal end of the card along the circumferential direction of the card head is greater than a length of the card near the proximal end a minimum length of the card head circumferential direction, when the card head is connected to the snap portion, the T-shaped card is stuck in the expansion of the radial outward force of the expansion member In the snap groove of the T-shaped structure.

The interventional medical system according to claim 1, wherein the delivery body further has a hollow protective sheath, and the protective sheath is recessed from the distal end to the proximal end to form a receiving groove, and the receiving sheath The minimum length of the inner cavity of the groove is greater than or equal to the outer diameter of the card head. When the conveying body and the instrument are connected by the expansion member, the receiving groove receives the card head and the planting Enter the connection to the medical device.

14. An implantable medical device, comprising a snap portion at a proximal end thereof, wherein the snap portion is provided with at least one snap groove, and the snap groove of the snap portion is coupled along the latch The axial extension of the portion, the snap portion includes at least one hollow tube having a proximal end, the proximal lumen of the hollow tube forming a snap groove of the snap portion, and the inner wall of the snap groove is disposed There is at least one first ledge extending toward the longitudinal central axis of the card slot.

15. The implantable medical device of claim 14, wherein the first ledge is located at a proximal end of the snap slot.

The implantable medical device according to claim 14, wherein the first convex edge The number is one, and the first convex edge is an annular structure coaxial with the longitudinal central axis of the hollow tube.

17. A delivery device for implanting a medical device, comprising a delivery body, the delivery body comprising a card head detachably coupled to the implantable medical device, wherein the delivery device further comprises a movable passage through The expansion member conveying the internal cavity, the card head including at least one card extending from the proximal end to the distal end substantially toward the longitudinal central axis of the card head, the card having elasticity, the card being The expansion member expands under the action of a radially outward force and restores shape as the expansion member moves relative to the delivery body until the card is no longer radially expanded.

18. The conveying device according to claim 17, wherein the number of cards of the card head is plural, and the cards of the plurality of card heads are spaced apart from each other.

The conveying device according to claim 17, wherein the card comprises a T-shaped piece, and a distal end thereof has a circumferential length along the circumferential direction of the card head, and the card is circumferentially along the card head. The maximum length.

20. A conveyor according to claim 19, wherein said card has a uniform thickness.

21. The delivery device of claim 17, wherein the card distal end outer wall of the card head is provided with a second ledge extending away from the longitudinal central axis of the card head.

The conveying device according to claim 17, wherein the conveying body casing is provided with a hollow protective sheath, and the protective sheath is recessed from the distal end to the proximal end to form a receiving groove, and the protective sheath is surrounded The card head.