CN211188579U - Anti-leakage boosting device - Google Patents

Abstract

The utility model relates to a prevent leaking boosting device, including injection subassembly, leak protection subassembly and supplementary injection subassembly, the injection subassembly includes syringe needle and injection syringe, the proximal portion of syringe needle with the distal end fixed connection and the inner chamber fluid intercommunication of injection syringe, the leak protection subassembly includes sealing member and sheath pipe, the sealing member with the distal end of sheath pipe is connected, set up injection subassembly slidable the intracavity of leak protection subassembly, the syringe needle can pass the injection process is realized to the sealing member, the supplementary injection subassembly the distal end with the proximal end of injection subassembly is connected. The device can reduce or prevent that the injection from human tissue revealing in the injection process, realizes the successful injection to the high injection of consistency.

Description

Anti-leakage boosting device

Technical Field

The utility model relates to the field of medical equipment, concretely relates to prevent leaking boosting device.

Background

In the field of medical devices, delivery of injectate to a target area using a suitable injection device is critical to treatment. The existing disposable injector is mostly used for liquid injection, and cannot meet the required requirements when the injection with higher viscosity is pushed. For example, when injecting the two-component crosslinked gel-like filling currently on the market, there are several drawbacks as follows: on one hand, due to high pushing resistance, an operator cannot push easily, the pushing force is unstable, and the pushing amount cannot be accurately controlled due to large and small pushing force, so that the risk of a patient is greatly increased; on the other hand, because the viscosity of the injection is high, if a traditional injector is used, an injector with a thick needle needs to be selected and used, but the injector is not suitable for the existing widely popularized minimally invasive surgery or interventional surgery, and the situations of large wound and insufficient operation space exist. In the minimally invasive field, the size of an injection needle is usually not more than 0.5mm, so that the inner cavity of the needle is usually below 0.4mm, and the traditional injector can not ensure smooth injection and has accurate injection precision when using a needle head with the size; finally, and most importantly, due to the high viscosity and poor diffusion of the injectate, when the target area is a non-cavity area of human tissue, such as muscle, and the like, the injectate is extruded out of the injection area during injection along with the self-tension of the tissue during injection, so that the injectate in the area is leaked out of the tissue, and when the target area is an active organ, such as heart tissue, besides the self-tension of the tissue, the pulsation of the heart itself can cause the injectate to leak out of the tissue during injection.

Therefore, how to accurately and effectively send the injectate into the target area, reduce or eliminate the leakage of the injectate in human tissues, and ensure the pushing force is a problem to be solved urgently.

Disclosure of Invention

In view of this, the utility model aims at providing a prevent leaking boosting device for inject the higher injection thing of consistency to solve prior art injection thing when injecting and reveal, propelling movement unstable, the uncontrollable scheduling problem of injection volume.

The utility model aims at realizing through the following technical scheme:

the utility model provides a prevent leaking boosting device, includes injection assembly, leak protection subassembly and supplementary injection assembly, injection assembly includes syringe needle and syringe, the proximal portion of syringe needle with distal end fixed connection and the inner chamber fluid intercommunication of syringe, leak protection subassembly includes sealing member and sheath, the sealing member with the distal end of sheath is connected, injection assembly slidable ground sets up in the lumen of sheath, the syringe needle can pass the sealing member realizes the injection process, supplementary injection assembly's distal end with injection assembly's near-end is connected.

The utility model discloses the purpose still further realizes through following technical scheme:

in one embodiment, the seal is a resilient structure.

In one embodiment, the seal is a rigid structure having a through-hole provided therein through which the injection needle passes to effect the injection procedure.

In a preferred embodiment, a sealing ring is arranged in the through hole to achieve a sealing fit with the injection needle.

In one embodiment, the distal end of the seal is concave.

In one embodiment, the sealing member is provided with a connecting means, and the sealing member is fixedly connected with the distal end of the sheath tube through the connecting means.

In one embodiment, the sealing member is provided with a connection means by which the sealing member is detachably connected to the distal end portion of the sheath.

In a preferred embodiment, the connecting means is an elastic tube or the connecting means is a ball connection.

In a preferred embodiment, the sealing element is connected to the distal end of the connecting device by one or more of split gluing, split mechanical fastening, integral injection molding, integral hot melt molding, integral compression molding, and integral 3D printing.

In one embodiment, the distal portion of the sheath is provided with a curved section.

In one embodiment, the secondary injection assembly includes a secondary injection container and a pusher for pushing injectate contained within the secondary injection container into the syringe.

Compared with the prior art, the beneficial effects of the utility model are mainly embodied in that:

1. the utility model discloses be provided with the leak protection subassembly, in the non-cavity region to human tissue, for example the muscle, perhaps to the human tissue of motion, for example positions such as cardiac muscle, when the injection object that the injection viscosity is high, the leak protection subassembly can reduce or prevent at the injection in-process, because the injection object diffusion degree is relatively poor in the tissue or the self-tension or the motility of following the tissue and leaded to by backward extrusion injection region, the phenomenon that the injection object was revealed from this regional human tissue is backward promptly, just the utility model provides a technical scheme simple structure, it is convenient to connect, makes the facility.

2. The utility model provides a technical scheme can realize the successful injection to the injection thing that the consistency is high on the basis that does not increase syringe needle diameter, and the injection thing reveals that the degree is lower or almost do not have and reveals, is applicable to the minimal access surgery or intervenes the operation, does not influence the opening size of above-mentioned operation, has reduced the operation risk.

3. The utility model discloses set up the crooked section can adapt to among the minimal access surgery or the intervention operation, the injection that needs go on through human passageway multi-direction, many operating spaces.

4. The utility model discloses the supplementary injection subassembly that sets up adopts the spiral boosting mode, injection volume, propelling movement time, the propelling movement power size that can the accurate control injection thing.

5. The utility model discloses set up the injection syringe with adopt detachable connection structure between the supplementary injection subassembly, at the injection in-process, can satisfy packing many times and the propelling movement of injection thing.

Drawings

Fig. 1 is a schematic view of an overall structure of a leakage-proof boosting device according to a first embodiment of the present invention.

Fig. 2 is a schematic view illustrating a connection device and a syringe according to a first embodiment of the present invention.

Fig. 3a and 3b are schematic views illustrating a connection device and a sheath according to a first embodiment of the present invention.

Fig. 4 is a schematic structural view of a bending section of a distal portion of a sheath according to a first embodiment of the present invention.

Fig. 5 is a schematic view illustrating a detachable connection structure of a sealing member and a distal end portion of a sheath according to a first embodiment of the present invention.

Fig. 6 a-6 c are schematic structural views of the auxiliary injection assembly of the present invention.

Fig. 7a-7e are schematic views illustrating the operation of the leak-proof boosting device according to the present invention, wherein fig. 7a is a schematic view illustrating the evacuation of the gas in the injection tube before injection; FIG. 7b is a schematic view of the delivery of injectate into the syringe prior to injection; FIG. 7c is a schematic illustration of an injection at a point in the target tissue region; FIG. 7d is a schematic view of the point in FIG. 7c after the injection is completed; fig. 7e is a schematic illustration of a second spot injection of a target tissue region.

Fig. 8a to 8d are schematic diagrams illustrating various embodiments of the structure of a sealing member according to a third embodiment of the present invention.

Fig. 8 e-8 i are schematic diagrams illustrating various embodiments of the connection between the sealing element and the sheath according to the fourth embodiment of the present invention.

Wherein: 11 is a syringe needle, 111 is a syringe needle fixing device, 12 is a syringe needle, 21 is a sealing member, 211 is a through hole, 212 is a connecting device, 22 is a sheath, 221 is a bent section, 23 is a holding part, 24 is a detachable connecting structure, 3 is an auxiliary injection component, 31 is an auxiliary injection container, 311 is an injection container holding part, 32 is a pushing part, 321 is a pushing part holding part, 33 is an auxiliary pushing part, and 4 is a conventional syringe.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail with reference to the accompanying drawings and examples.

To more clearly describe the structure of the leak prevention boost device provided by the present invention, the terms "proximal" and "distal" are defined herein, which are conventional terms used in the field of interventional medical devices. Specifically, "proximal" refers to the end of the surgical procedure that is closer to the operator, and "distal" refers to the end of the surgical procedure that is further from the operator.

The first embodiment is as follows:

the utility model provides a prevent leaking boosting device (hereinafter simply referred to as "this device"), as shown in fig. 1, including injection subassembly, leak protection subassembly and supplementary injection subassembly 3, the injection subassembly includes syringe needle 11 and syringe 12, the proximal part of syringe needle 11 with distal end fixed connection and the inner chamber fluid intercommunication of syringe 12, leak protection subassembly 2 includes sealing member 21 and sheath 22, sealing member 21 with the distal end of sheath 22 is connected, set up injection subassembly slidable sheath 22's intracavity, syringe needle 11 can pass sealing member 21 realizes the injection process, supplementary injection subassembly 3 the distal end with injection subassembly's proximal end is connected.

In one embodiment, as shown in fig. 2, the needle 11 is provided with a needle holder 111, and the needle holder 111 has a square groove to facilitate a firm connection with the distal end of the syringe 12. In a preferred embodiment, the sealing member 21 is an elastic structure, and is fixedly connected to the distal end of the sheath 22. In a preferred embodiment, the sheath 22 is made of a metal material, and a grip 23 is connected to a proximal end portion thereof to facilitate gripping. In a preferred embodiment, the syringe 12 is made of a polymer material and is slidably disposed in the lumen of the sheath 22, and the proximal end of the syringe 12 is connected to the distal end of the auxiliary injection assembly 3.

In one embodiment, as shown in fig. 3a, the sealing member 21 is provided with a connecting means 212, the connecting means 212 is made of a wire or thread made of any deformable metal or polymer, and the connecting means 212 is detachably connected with the distal end portion of the sheath tube 22 through the connecting means 212, which has the advantages that the sealing member 21 can be quickly disassembled and assembled, the requirements of various specifications of the sealing member 21 can be met, the penetration depth of the injection needle 11 can be limited, and leakage can be prevented to a certain extent, in another preferred embodiment, as shown in fig. 3b, the sealing member 21 is provided with unequal connecting means 212, the head end of the sheath tube 22 is provided with a number of grooves which are matched with the connecting means 212 to form a fixed connection, and the design has the advantages that the grooves are provided to effectively increase the contact area, the connection firmness is increased.

In a preferred embodiment, as shown in fig. 4, the distal end portion of the sheath 22 is provided with a bending section 221, and the bending section 221 is made of a composite metal wire woven tube in which metal wires are wound and covered, and is provided with a length-adjustable metal wire connected to the grip portion 23 for adjusting a bending angle of the bending section 221. The above design has the advantages that the bending section 221 can rotate in any direction, has good support and shape memory after the confirmation of the direction, and can change the length of the bending section 221 to meet the requirements of different operation spaces.

In a preferred embodiment, as shown in fig. 5, the proximal end of the injection tube 12 and the distal end of the auxiliary injection assembly 3 are detachably connected by a detachable connection structure 24 disposed at the proximal end of the injection tube 12, and the detachable connection structure 24 is one of a two-way valve, a three-way valve, and a four-way valve. The advantage of the above design is that the device is more convenient in the process of disassembling and connecting the auxiliary injection assembly 3.

Example two:

based on the first embodiment, the second embodiment is different from the first embodiment in that: as shown in fig. 6a, the auxiliary injection assembly 3 further comprises an auxiliary injection container 31 and a pushing member 32, wherein the pushing member 32 is used for pushing the injectate contained in the auxiliary injection container 31 into the injection tube 12. A syringe grip 311 with a thread structure is provided on the auxiliary syringe 31, which can be disassembled and assembled with the pusher 32 provided in the inner cavity of the auxiliary syringe 31. The pushing member 32 is detachably connected with the auxiliary pushing member 33, and a pushing member grip 321 with a threaded structure is arranged at the proximal end of the pushing member 32 and is used for dismounting and assembling the pushing member 32 and the auxiliary pushing member 33. In one embodiment, the pushing member 32 and the auxiliary pushing member 33 are in a thread-fit structure, and the auxiliary syringe container 31 and the pushing member 32 can slide relatively. The advantage of the above design is that the pusher 32 can be advanced with precise control of the distance of advance and retracted quickly when retracted.

In another preferred embodiment, as shown in fig. 6b, the auxiliary syringe container 31 and the pushing member 32 are provided with visual scales, which is advantageous in that the user can easily determine the pushing amount of the pushing member 32 and the pushing amount of the injectate.

In another preferred embodiment, as shown in fig. 6c, a thread structure is provided on the proximal end of the auxiliary injection container 31 and the injection container grip 311; the proximal end of the pushing member 32 and the pushing member holding member 321 are provided with thread structures, which is advantageous in facilitating the detachment and assembly of the auxiliary injection container 31 and the pushing member 32, and facilitating the detachment and assembly of the auxiliary pushing member 33 and the pushing member 32.

The working principle of the auxiliary injection assembly 3 is as follows:

as shown in fig. 6 a-6 c, during the process of pushing the injection, the auxiliary pushing member 33 is connected to the proximal end of the auxiliary injection container 31, because the auxiliary pushing member 33 and the pushing member 32 have a threaded fit, when the pushing member 32 is rotated clockwise, the pushing member 32 can be pushed towards the distal end of the device at a certain rate, the injection can be injected into the tissue from the injection needle 11 at a stable rate, and when the pushing member 32 and the auxiliary pushing member 33 are retracted, the pushing member 32 and the auxiliary pushing member 33 can be retracted towards the proximal end of the device together.

Based on the above design, as shown in fig. 7a-7e, the operation process of the device is as follows:

the first step is as follows: as shown in fig. 7a, the device is located outside the body, the detachable connection structure 24 is a three-way valve structure, one end of the detachable connection structure 24 is connected to the proximal end of the injection tube 12, and the detachable connection structure is firstly set to be in a state of being communicated with the inner cavity of the injection tube 12, at this time, a commercially available conventional injector 4 is connected to the other end of the detachable connection structure 24, physiological saline is injected into the inner cavity of the injection tube 12 through the commercially available conventional injector 4, air in the inner cavity of the injection tube 12 is completely evacuated through the injection needle 11 until a small amount of physiological saline is observed to be emitted from the injection needle 11, the air evacuation is completed, and then the conventional injector 4 is detached.

The second step is that: as shown in fig. 7b, when the device is not delivered into the human body, the user pushes the syringe 12 towards the distal end of the device, pushes the needle 11 out of the sealing member 21 until the needle holder 111 abuts against the sealing member 21, evacuates the auxiliary injection assembly 3 pre-loaded with the injectate to air, and connects the syringe to the proximal end of the detachable connection structure 24, wherein the detachable connection structure 24 is configured to connect the syringe 12 and the auxiliary injection assembly 3, and then delivers the injectate into the syringe 12 through the auxiliary injection assembly 3 to the needle 11 until a small amount of injectate is observed to burst from the needle 11.

The third step: as shown in fig. 7c, when the device is not yet delivered to the body, the syringe 12 is withdrawn from the distal end of the device, and the needle 11 is completely withdrawn to the proximal end of the seal 21. The device is advanced into the target area until the seal 21 reaches the target tissue area, and then after further forcing the seal 21 fully against the target tissue area surface, the syringe 12 is advanced so that the needle 11 penetrates the seal 21 and penetrates into the tissue, and the injectate is delivered through the auxiliary injection assembly 3 and into the tissue.

The fourth step: as shown in fig. 7d, after a single injection is completed, the needle 11 is not immediately withdrawn, but the seal 21 is still held against the target tissue area for a period of time that reduces or prevents reverse leakage of injectate from the tissue, and the needle 11 is subsequently withdrawn from the target tissue area. Firstly, the sealing element 21 is subjected to thrust to generate an abutting force on target tissues, so that a needle pricking port on the tissues is blocked or reduced, and the abutting is tighter when the sealing element 21 is in an elastic structure, so that the advantages are more obvious, and the needle pricking port can be blocked and prevented from back leakage in the injection process and after the injection; secondly, the contact time of the sealing element 21 to the target tissue is increased, so that the injectate can be fully diffused into the tissue, and if the injectate has the self-solidification performance, the sufficient contact time can give the injectate sufficient self-solidification time, and finally the back leakage is reduced; thirdly, the protection of the seal 21 against the wound of the target tissue, which limits the injection needle 11 on the tissue to this area, to a certain extent preventing the wound area from increasing.

The fifth step: as shown in fig. 7e, the injection point is selected again after the position of the bending section 221 is adjusted by adjusting the wire of the connecting portion of the bending section 221 and the holding portion 23, and the above-mentioned needle insertion injection is repeated.

Example three:

unlike the first embodiment, the sealing member 21 of the present embodiment can be configured differently according to different requirements.

In one embodiment, as shown in fig. 8a-8d, the sealing member 21 is an elastic structure, and the sealing member 21 and the sheath 22 are connected by gluing through the connecting means 212. As shown in fig. 8a, the injection needle 11 is inserted into the sealing member 21, and at this time, the sealing member 21 can adapt to the shape of the contact part of the injection needle 11, so that the clearance between the injection needle 11 and the sealing member 21 is small, and further the injection is prevented from leaking back to the device from the tissue pricking part; as shown in fig. 8b, after the injection needle 11 is removed and the injection needle 11 is separated from the sealing member 21, the sealing member 21 will return to the state of not withdrawing the injection needle, and seal the hole of the injection needle 11 passing through the sealing member 21, so as to prevent the injection from leaking back to the device from the tissue puncture site; as shown in fig. 8c, the sealing element 21 is an elastic structure, which can form a wavy surface after being pressed, or can be adapted to the surface shape of the tissue, and the wavy contact surface increases the contact area between the sealing element 21 and the tissue, so that the needle insertion opening on the tissue can be further pressed and reduced, and the injectate is prevented from leaking back from the needle insertion opening to the outside of the tissue; as shown in fig. 8d, when the sheath 22 is not perpendicular to the tissue surface, the sealing member 21 can still be tightly attached to the tissue surface after being pressed in an inclined state, thereby further increasing the above-mentioned leakage-proof effect.

Example four:

in contrast to the first embodiment, the sealing member 21 of the present embodiment can be connected in different ways.

In one embodiment, as shown in fig. 8e, a T-shaped structure is disposed at a distal end of the sheath tube 22 and is formed by metal processing, a circular connecting device 212 is fixedly connected to the periphery of the sheath tube 22 by welding or the like, the connecting device 212 is also formed by metal processing, wherein a distal end of the connecting device 212 is flush with the distal end of the sheath tube 22 and has a smooth surface, a radial thickness of the connecting device 212 is greater than or equal to 0.2mm, the sealing member 21 is an elastic structure, and the sealing member 21 is disposed on the connecting device 212 and the sheath tube 22 by integral hot-melting molding to completely cover the T-shaped structure, and the thickness is greater than or equal to 0.2 mm. The above design has the advantages that the sealing element 21 can be firmly connected to the sheath tube 22, the sealing element 21 is effectively prevented from falling off, meanwhile, the material of the sealing element 21 has elasticity, the attaching performance is improved, the sealing effect of the injection in the tissue is ensured, and meanwhile, the risk is reduced.

In one embodiment, as shown in fig. 8f, a distal portion of the sheath 22 is provided with a T-shaped structure, which is formed by metal processing, and a circular ring-shaped connecting device 212 is fixedly connected to the periphery of the T-shaped structure by gluing or the like, the connecting device 212 is also formed by metal processing, wherein a distance is kept between a distal end of the connecting device 212 and a distal end of the sheath 22, so that a ring-shaped gap remains between the distal end of the connecting device 212 and the distal end of the sheath 22, a radial thickness of the connecting device 212 is greater than or equal to 0.2mm, the sealing member 21 is an elastic structure, the sealing member 21 is disposed on the connecting device 212 and the sheath 22 by integral injection molding, and a thickness of the sealing member 21 is greater than or equal to 0.5 mm. The advantage of above-mentioned design lies in can with sealing member 21 firmly connect in on sheath pipe 22, effectively prevent sealing member 21 drops, sets up annular gap gives sealing member 21 is at axial direction elasticity tensile and compressive property, is favorable to more sealing member 21 and tissue laminating, moreover sealing member 21's material itself has elasticity, can increase its and tissue's adherence nature, has reduced the risk when guaranteeing the sealed effect of injection thing in the tissue.

In one embodiment, as shown in fig. 8g, holes are provided in the sheath 22 in different numbers, the sealing member 21 is an elastic structure, and is made for 3D printing, and covers all the holes of the sheath 22, and the thickness of the sealing member 21 is greater than or equal to 0.5 mm. The advantage of above-mentioned design lies in can with sealing member 21 firmly connect in on sheath 22, effectively prevent sealing member 21 drops, just sealing member 21 and tissue contact part can be sunken all around, increases its laminating nature, moreover the material itself of sealing member 21 has elasticity, has increased its laminating nature, has reduced the risk when guaranteeing the sealed effect of injection thing in the tissue.

In one embodiment, as shown in fig. 8h, the sealing member 21 is a rigid structure, and the proximal end of the sealing member 21 and the distal end of the sheath 22 are both provided with a thread structure, and both are detachably connected by threads. A through hole 211 is formed in the rigid structure, and a sealing ring is arranged on the through hole 211, so that when the injection needle 11 passes through the through hole 211, sealing fit can be achieved. The above design has the advantage that the thread structure facilitates the removal and assembly of the sealing member 21 and reduces or prevents the passage of injectate from the tissue through the through hole 211 into the device.

In one embodiment, as shown in fig. 8i, the sealing member 21 is a rigid structure, molded in one piece, and the sealing member 21 is concave. The above design has the advantage that after the tissue is pressed by the sealing member 21, the contact area between the tissue surface and the sealing member 21 has a pressing force towards the center, thereby further enhancing the sealing of the injection at the needle insertion site in the tissue.

Finally, it should be understood that the above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalents, improvements, etc. made within the spirit and principles of the present invention should be included within the scope of the present invention.

Claims (10)

1. A leak-proof boost device comprising an injection assembly, a leak-proof assembly and an auxiliary injection assembly (3), the injection assembly comprising an injection needle (11) and a syringe (12), a proximal portion of the injection needle (11) being fixedly connected and in fluid communication with a distal end of the syringe (12) and an inner lumen, the leak-proof assembly (2) comprising a seal (21) and a sheath (22), the seal (21) being connected to a distal end of the sheath (22), the injection assembly being slidably disposed within the lumen of the sheath (22), the injection needle (11) being capable of performing an injection procedure through the seal (21), the distal end of the auxiliary injection assembly (3) being connected to the proximal end of the syringe (12).

2. A leakage prevention boost device according to claim 1, where said seal (21) is of resilient construction.

3. A leakage prevention boost device according to claim 1, characterized in that said seal (21) is a rigid structure on which a through hole (211) is provided, said injection needle (11) passing through said through hole (211) for the injection process.

4. A leakage prevention boost device according to claim 3, wherein a sealing ring is provided in said through hole (211).

5. A leakage prevention boost device as claimed in claim 3, wherein the distal end of said seal (21) is concave.

6. A leakage prevention boost device according to claim 1, characterized in that said seal (21) is provided with a connection means (212), said seal (21) being fixedly connected to the distal end of said sheath (22) by said connection means (212).

7. A leakage prevention boost device according to claim 1, characterized in that said seal (21) is provided with a connection means (212), said seal (21) being detachably connected to a distal end portion of said sheath (22) by said connection means (212).

8. A leakage prevention boost device according to claim 6 or 7, characterized in that said connection means (212) is an elastic tube or said connection means (212) is a ball connection structure.

9. A leakage prevention boost device according to claim 1, where the distal end portion of the sheath (22) is provided with a curved section (221).

10. A leakage prevention boost device according to claim 1, characterized in that said secondary injection assembly (3) comprises a secondary injection container (31) and a pusher (32), said pusher (32) being adapted to push injectate contained in said secondary injection container (31) into said syringe (12).

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