CN209270601U - Telescopic catheter and interventional treatment equipment using it - Google Patents

Abstract

The utility model relates to the technical field of medical instruments, in particular to a retractable catheter and interventional treatment equipment using the same. The telescoping catheter includes a first tubular member and a second tubular member; the second tubular member is movably worn inside the first tubular member, the proximal end of the second tubular member has a pushing portion, the The distal end of the second tubular member has an elastically bendable suction portion, and the pushing portion is used to drive the suction portion to extend and retract from the first tubular member. When the telescopic catheter is used for aspiration of the thrombus in the proximal segment of the anterior descending branch, the second tubular member is pushed into the opening of the anterior descending branch, which can prevent the thrombus of the anterior descending branch from falling to the circumflex branch, thereby increasing safety and improving operation effect. Moreover, when the thrombus is not being sucked, the telescopic catheter can also advance the second tubular member to increase the overall active support force of the catheter, which is beneficial to popularization and application.

Description

Telescopic catheter and interventional treatment equipment using it

technical field

The utility model relates to the technical field of medical instruments, in particular to a retractable catheter and interventional treatment equipment using the same.

Background technique

At present, interventional medicine has been clinically applied for decades, and it is an important treatment method in the fields of cardiovascular, cerebrovascular, peripheral blood vessels, tumors and non-vascular. One of the major diagnostic and therapeutic techniques. At present, the most widely used are cardiac interventional therapy, neural interventional therapy, cerebrovascular interventional therapy, tumor, peripheral blood vessel and non-vascular lumen interventional therapy.

With the accumulation of clinical data, the application value of thrombus aspiration catheter has gradually been recognized. At present, thrombus aspiration catheters with different structures have been developed in the international field to aspirate thrombus in the peripheral blood vessels of the human body. However, these aspiration catheters are only single-layer sleeve structures at present. Regionally (eg, left main, anterior descending, and circumflex), there is a risk of thrombus dropping into the circumflex when the catheter enters the left main during aspiration. Moreover, due to the limitation of its structure and material, the suction ability of the catheter is poor, and it is easy to cause damage to the human body when entering the blood vessel, which causes a lot of inconvenience to the operation process, and the operation effect is limited.

The information disclosed in the background technology section is only intended to deepen the understanding of the general background technology of the application, and should not be regarded as an acknowledgment or any form of suggestion that the information constitutes the prior art known to those skilled in the art.

Utility model content

The purpose of the utility model is to provide a telescopic catheter and an interventional treatment device using it, so as to solve the technical problems that the existing catheter is easy to cause the thrombus to fall off when the thrombus is sucked, and the operation is inconvenient.

In order to achieve the above object, the utility model adopts the following technical solutions:

In a first aspect, the utility model provides a telescopic catheter, which includes: a first tubular member and a second tubular member; the second tubular member can be movably inserted inside the first tubular member, and the first tubular member The proximal end of the two tubular members has a pushing portion, the distal end of the second tubular member has a suction portion that can be elastically bent, and the pushing portion is used to drive the suction portion to protrude from the first tubular member and retract.

As a further technical solution, a marking portion is provided on the outer peripheral surface of the proximal end of the second tubular member, and the marking portion is used to display the movement of the second tubular member relative to the first tubular member distance.

As a further technical solution, a protruding portion is provided on the outer peripheral surface of the proximal end of the second tubular member, and the protruding portion is used for limiting contact with the nozzle of the tip of the first tubular member.

As a further technical solution, both the first tubular member and the second tubular member are provided through a lumen structure, and the lumen structure has at least one straight lumen section and a curved lumen section, so The linear lumen section is distributed near the proximal end of the lumen structure, and the curved lumen section is distributed near the distal end of the lumen structure.

As a further technical solution, the lumen structure includes: a first structural layer, a marker layer and a second structural layer, and the first structural layer, the marker layer and the second structural layer are sequentially stacked from inside to outside .

As a further technical solution, the lumen structure further includes: a reinforcement layer, and the reinforcement layer is arranged between any two adjacent layers of the first structure layer, the marker layer and the second structure layer.

As a further technical solution, the length of the second tubular member is greater than the length of the first tubular member.

As a further technical solution, the pushing part is a part of the structure of the proximal end of the second tubular member itself or a sleeve structure arranged on the outer peripheral surface of the proximal end of the second tubular member.

It can be seen that by adopting the technical solution of the first aspect above, the utility model has the following beneficial effects:

The utility model provides a telescopic catheter, which adopts a first tubular member and a second tubular member that are movably threaded together, and by controlling the pushing part at the proximal end of the second tubular member, the pulling of the distal end of the second tubular member is controlled. The suction part can extend and retract from the first tubular member. Therefore, when the retractable catheter sucks the thrombus, it can guide the first tubular member to the opening of the anterior descending branch corresponding to the left main trunk without affecting the circumflex branch blood flow. Flow, and then send the suction part of the second tubular member into the anterior descending branch, so that when the thrombus is sucked, the thrombus can be prevented from falling to the circumflex branch, which increases the safety and improves the operation effect. Moreover, when the thrombus is not being sucked, the second tubular member can also be advanced to increase the overall active support force of the catheter, which is equivalent to the deep insertion technique. However, since the suction part of the catheter is thinner and can be elastically bent, it is safer to insert deeper than ordinary catheters, and the operation is convenient.

In the second aspect, the present utility model also provides an interventional treatment device, which includes the above-mentioned telescopic catheter. In general, the telescoping catheter mainly includes: a first tubular member and a second tubular member; the second tubular member is movably sheathed on the first tubular member, and the proximal end of the second tubular member has A pushing part, the distal end of the second tubular member has a suction part that can be elastically bent, and the pushing part is used to drive the suction part to protrude and retract from the first tubular member.

It can be seen that, by adopting the above-mentioned technical solution of the second aspect, the utility model has the following beneficial effects: the utility model also provides an interventional therapy device, which can suck thrombus by using the above-mentioned telescopic catheter, which is not only easy to operate , but also effectively prevent the thrombus from falling off, the structure is simple, and it is beneficial to popularization and application.

Description of drawings

In order to more clearly illustrate the specific implementation of the utility model or the technical solutions in the prior art, the accompanying drawings that need to be used in the description of the specific implementation or the prior art will be briefly introduced below. Obviously, the following descriptions The accompanying drawings are some implementations of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without any creative work.

Fig. 1 is a schematic structural diagram of a telescopic catheter provided by Embodiment 1 of the present invention, wherein the telescopic catheter is in an extended state;

Fig. 2 is a schematic structural diagram of the telescopic catheter provided by Embodiment 1 of the present invention, wherein the telescopic catheter is in a contracted state;

Fig. 3 is a schematic structural diagram of the telescopic catheter provided by the second embodiment of the utility model;

Fig. 4 is a schematic structural diagram of the telescopic catheter provided by the third embodiment of the utility model;

Fig. 5 is a partial schematic diagram when thrombus is drawn according to Embodiment 4 of the present utility model.

Icons: 1-the first tubular member; 2-the second tubular member; 3-the circumflex branch; 4-the anterior descending branch; 5-the left trunk; 21-push part; 22-suction part; 23-marking part; 24 - raised portion.

Detailed ways

The technical solutions of the utility model will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are part of the embodiments of the utility model, but not all of them. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

The specific embodiment of the utility model will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to illustrate and explain the utility model, and are not intended to limit the utility model.

Embodiment one

As shown in FIG. 1, FIG. 2 and FIG. 5, this embodiment provides a telescopic catheter, which includes: a first tubular member 1 and a second tubular member 2; the second tubular member 2 is movably sheathed on the first Inside the tubular member 1 (that is, the first tubular member 1 can be regarded as an outer casing, the second tubular member 2 can be regarded as an inner casing, and the diameter of the second tubular member 2 is smaller than that of the first tubular member 1, the second tubular member The member 2 can be pulled and moved along the length direction of the first tubular member 1). Moreover, the proximal end of the second tubular member 2 has a pushing portion 21 , and the distal end of the second tubular member 2 has an elastically bendable suction portion 22 so as to better enter the anterior descending branch 4 . During use, by controlling the pushing part 21, the suction part 22 can be driven to protrude and retract from the first tubular member 1. Of course, the setting of the pushing part 21 is to better control the suction part 22 at any position. want a fixed position.

It should be noted that the term "proximal end" usually refers to the end close to the operator (ie, the tail end of the component), and the term "distal end" usually refers to the end away from the operator (ie, the head end of the component).

In combination, in this embodiment, when the thrombus is sucked, the first tubular member 1 can be introduced into the opening of the anterior descending branch 4 corresponding to the left trunk 5 without affecting the blood flow of the circumflex branch 3, and then the suction of the second tubular member 2 The part 22 is sent into the anterior descending branch 4 to prevent the thrombus from falling to the circumflex branch 3, which increases the safety and improves the operation effect. Moreover, in this embodiment, when the thrombus is not being sucked, the second tubular member 2 can also be advanced to increase the active support force of the catheter as a whole, which is equivalent to the deep insertion technique, but since the suction part 22 of the catheter is thinner and can be elastically Curved, it is safer to insert deeply than ordinary catheters, and it is easy to operate.

In this embodiment, the specific forms of the first tubular member 1 and the second tubular member are not limited. Preferably, for the convenience of operation, both the first tubular member 1 and the second tubular member 2 are provided through a lumen structure, and the lumen structure has at least one straight lumen segment and a curved lumen segment, wherein the straight tube The lumen segment is distributed at the proximal end close to the lumen structure, and the curved lumen segment is distributed at the far end close to the lumen structure. Certainly, the curved lumen section may include multiple curved portions, and the multiple curved portions are all curved along a certain direction.

It can be understood that, in this embodiment, in order to facilitate operation, the length of the first tubular member 1 is greater than the length of the second tubular member 2, so that the pushing portion 21 at the proximal end of the first tubular member 1 can be exposed, thereby facilitating operate.

The materials of the first tubular member 1 and the second tubular member 2 in this embodiment are not limited, and corresponding materials can be flexibly selected and used according to actual needs. Overall, the first tubular member 1 can be made of a slightly harder material, while the second tubular member 2 can be made of flexible material.

Of course, the lumen structures of the first tubular member 1 and the second tubular member 2 can also be formed in the following composite form.

For example: the lumen structure includes: the first structural layer (inner layer), the marker layer (middle layer) and the second structural layer (outer layer), the first structural layer, the marker layer and the second structural layer from inside to outside Cascading settings. With such a configuration, it is possible to set desired characteristics such as suppression of bending of the catheter main body.

Preferably, as the constituent materials of the first structural layer and the second structural layer, polyamide resin, polyester polyamide resin, polyether polyamide resin, polyurethane, ABS resin, polyester elastomer resin, Any of polyurethane elastomer resin, fluororesin (PFA, PTFE, ETFE, etc.). In particular, by using ABS resin or nylon as the constituent material of the first structural layer and the second structural layer, appropriate strength can be imparted to the main body distal end. Furthermore, by using fluororesin, preferably PTFE, for the first structural layer, the operability of the guide wire inserted into the lumen is improved.

Preferably, the role of the marker layer is to ensure that the position of the second tubular member 2 (especially the position of the suction portion 22) is confirmed under X-ray fluoroscopy, and the material forming the marker layer is preferably barium sulfate, dioxygen trioxide, etc. X-ray opaque materials such as bismuth, tungsten, etc.

In addition, in this embodiment, the lumen structure further includes: a reinforcement layer, which is arranged between any two adjacent layers of the first structure layer, the marker layer and the second structure layer.

Of course, the setting of the reinforcement layer is mainly for the first external tubular member 1, for example: the reinforcement layer can be a pre-embedded metal mesh, so as to prevent the main body of the first tubular member 1 from bending and improve the performance of the second tubular member 1. Torque transmittance when a tubular member 1 rotates. Preferably, the mesh shape constituting the metal mesh is not particularly limited, and it can be, for example, circular, approximately rectangular, or approximately elliptical. In addition, the reinforcing layer can also be a helical linear structure, and the strength of the catheter can be easily adjusted according to the number of helical turns.

In this embodiment, the first structural layer (inner layer), the marker layer (middle layer) and the second structural layer (outer layer) can be bonded to each other by a suitable adhesive, or connected by hot melt, or Integral molding by injection molding or the like. In addition, a layer of memory material can also be added to the suction portion 22 of the second tubular member 2 so as to automatically form a corresponding shape according to the needs of the patient. In addition, those skilled in the art can make adaptive improvements to the second tubular member 2 on the basis of the above structure, for example: adding a hydrophilic coating on the surface of the second tubular member 2 to increase the lubrication of the second tubular member 2 so that it can be pushed easily.

Wherein, the first tubular member 1 in this embodiment is used as the outer tube, which can follow the existing catheter structure, and of course other self-developed structures can also be used. For example: the first tubular member 1 may include a guide wire lumen, and the guide wire lumen may be disposed outside or inside the first tubular member 1 . Of course, this is only one implementation manner, and is not a limitation to the present application.

Wherein, the second tubular member 2 in this embodiment is used as a telescopically movable inner tube, and at least one suction hole is provided on the suction part 22, wherein the cross section of the suction hole is circular or elliptical, and of course Other shapes are possible. In addition, the number of the suction holes may also be multiple, and the multiple suction holes are opened on the side wall of the suction portion 22 .

Of course, the suction holes here may not be provided separately, and the suction catheter or the head end of the inner pipe (second tubular member 2 ) may be used as required.

Moreover, the pushing part 21 of the second tubular member 2 can be a part of the structure of the proximal end of the second tubular member 2 itself, or can be a sleeve structure arranged on the outer peripheral surface of the proximal end of the second tubular member 2 . Certainly, anti-slip threads or anti-slip protrusions may be provided on the pushing portion 21 . Of course, anti-slip coatings and the like may also be provided.

In summary, this embodiment provides a telescopic catheter, using the first tubular member 1 and the second tubular member 2 that are movably threaded together, and by controlling the pushing part 21 at the proximal end of the second tubular member 2, the second tubular member 2 The suction part 22 at the distal end of the two tubular members 2 can be stretched out and retracted from the first tubular member 1. Therefore, when the retractable catheter sucks thrombus, it can guide the first tubular member 1 to the left trunk 5 correspondingly. The opening of the anterior descending branch 4 does not affect the blood flow of the circumflex branch 3, and then the suction part 22 of the second tubular member 2 is sent into the anterior descending branch 4 to prevent thrombus from falling to the circumflex branch 3, which increases safety and improves effect of surgery. Moreover, when the thrombus is not being sucked, the second tubular member 2 can also be forwarded to increase the active support force of the catheter as a whole, which is equivalent to the deep insertion technique, but because the suction part 22 of the catheter is thinner and can be elastically bent, it is more flexible than a common catheter. Deep insertion is safer and easier to operate.

Embodiment two

As shown in Figure 3, this embodiment 2 provides a telescopic catheter. This embodiment 2 adds another technical solution for the marking part on the basis of the embodiment 1. The embodiment 1 discloses The technical content is also applicable to the second embodiment, and the disclosed technical features of the first embodiment will not be described repeatedly.

In this embodiment, in order to facilitate understanding of the moving distance of the second tubular member 2, a marking portion 23 is provided on the outer peripheral surface of the proximal end of the second tubular member 2, and the marking portion 23 is along the axial direction of the second tubular member 2. distribution, wherein the marking part 23 is used to display the moving distance of the second tubular member 2 relative to the first tubular member 1 .

Wherein, for the marking part 23, its specific form is not limited, and can be flexibly set according to needs. For example: the marking portion 23 may be a printed scale or other markers, which may be scale numbers arranged at intervals along the length direction of the second tubular member 2 . It can be seen that the moving distance of the second tubular member 2 can be known in real time through the marking part 23, and the safety is enhanced.

Embodiment three

As shown in Figure 4, the third embodiment provides a telescopic catheter, and the third embodiment adds another technical solution for the protrusion on the basis of the first and second embodiments. 1. The technical content disclosed in Embodiment 2 is also applicable to Embodiment 3, and the technical features disclosed in Embodiment 1 and Embodiment 2 will not be described repeatedly.

In this embodiment, in order to facilitate fixing and also to play a certain position-limiting effect, a protruding portion 24 is provided on the outer peripheral surface of the proximal end of the second tubular member 2, and the protruding portion 24 is used for contacting the first tubular member. The nozzle limit contact of the tip of the member 1 prevents the suction part 22 at the distal end of the second tubular member 2 from extending too long.

Of course, further, the protruding portion 24 can be a protruding ring extending radially along the second tubular member 2, or a bump extending radially along the second tubular member 2, etc. The nozzles at the tip of the tubular member 1 are offset. Furthermore, the protruding portion 24 can be integrated with the second tubular member 2 or can be an additional external member, which is not limited here.

Embodiment four

Embodiment 4 provides an interventional treatment device, which includes the telescopic catheter described in any one of Embodiment 1, Embodiment 2, and Embodiment 3. The interventional treatment device can suck the thrombus by using the above-mentioned telescopic catheter, which is not only convenient to operate, but also effectively prevents the thrombus from falling off, has a simple structure, and is favorable for popularization and application. Specifically, as shown in FIG. 1 to FIG. 5, the telescopic catheter includes a first tubular member 1 and a second tubular member 2; The tubular member 1 can be regarded as an outer casing, the second tubular member 2 can be regarded as an inner casing, and the diameter of the second tubular member 2 is smaller than that of the first tubular member 1, and the second tubular member 2 can be viewed along the first tubular member 1. Pulling and inserting movement in the length direction). Moreover, the proximal end of the second tubular member 2 has a pushing portion 21, and the distal end of the second tubular member 2 has an elastically bendable suction portion 22. During use, the pushing portion 21 can be controlled to drive the suction portion 22 from The first tubular member 1 is extended and retracted.

Correspondingly, the interventional treatment device includes: a suction device and a connector, the suction device is connected to the proximal end of the second tubular member 2 through the connector, and is used for suctioning thrombus.

In addition, the interventional treatment equipment may also include X-ray equipment, which is used to generate and control X-rays for radiological examination of human tissues. This type of equipment has necessary parts such as X-ray generating device, patient bed and equipment support device, filter plate, etc., and may also include signal analysis and display part, cooling system, body cavity treatment tube and treatment plan program, etc.

It should be noted that other features of the telescopic catheter in the fourth embodiment have been described in detail in the above-mentioned embodiments, and the technical solutions disclosed in the fourth embodiment include the technical solutions disclosed in the above-mentioned embodiments. The content protected by the embodiment also belongs to the protection content of the fourth embodiment, and the same parts will not be described again. Similarly, the technical solution disclosed in the fourth embodiment has the same beneficial effects as those of the above-mentioned embodiments.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present utility model, and are not intended to limit it; although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand : It is still possible to modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements to some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions depart from the various embodiments of the present invention Scope of technical solutions.

Claims (9)

1. A telescoping catheter, characterized in that it comprises: a first tubular member and a second tubular member; the second tubular member is movably inserted inside the first tubular member, and the second tubular member The proximal end of the second tubular member has a pushing portion, and the distal end of the second tubular member has an elastically bendable suction portion, and the pushing portion is used to drive the suction portion to protrude and retract from the first tubular member . 2. The telescoping catheter according to claim 1, wherein a marking portion is provided on the outer peripheral surface of the proximal end of the second tubular member, and the marking portion is used to indicate that the second tubular member is opposite to each other. The moving distance of the first tubular member. 3. The telescopic catheter according to claim 1, wherein a protruding portion is provided on the outer peripheral surface of the proximal end of the second tubular member, and the protruding portion is used to connect with the tip of the first tubular member. The nozzle limit contact. 4. The telescopic catheter according to claim 1, characterized in that, both the first tubular member and the second tubular member are provided through a lumen structure, and the lumen structure has at least one straight lumen and a curved lumen segment, the straight lumen segment is distributed near the proximal end of the lumen structure, and the curved lumen segment is distributed near the distal end of the lumen structure. 5. The telescopic catheter according to claim 4, wherein the lumen structure comprises: a first structural layer, a marker layer and a second structural layer, and the first structural layer, the marker layer and the second structural layer The two structural layers are stacked sequentially from the inside to the outside. 6. The telescoping catheter according to claim 5, wherein the lumen structure further comprises: a reinforcing layer, the reinforcing layer is arranged in the first structural layer, the marker layer and the second structural layer between any two adjacent layers. 7. The telescoping catheter of claim 1, wherein the second tubular member has a greater length than the first tubular member. 8. The telescopic catheter according to claim 1, wherein the pushing part is a part of the structure of the proximal end of the second tubular member or a sleeve arranged on the outer peripheral surface of the proximal end of the second tubular member structure. 9. An interventional treatment device, characterized by comprising the telescopic catheter according to any one of claims 1-8.