CN215653096U - Non-destructive needle - Google Patents

Abstract

The embodiment of the utility model provides a nondestructive needle, which comprises a needle tube and a sleeve which are communicated with each other; a needle core and a piston rod are arranged in the sleeve, and the needle core is arranged on the piston rod; the needle tube is sleeved on the needle core, the end part of the needle core extends to the outside of the needle tube, and no gap exists between the needle tube and the needle core; the piston rod drives the needle core to move under the condition of moving relative to the sleeve. In the process of puncturing the implanted drug delivery device, the falling scraps on the implanted drug delivery device are reduced to enter the interior of the nondestructive needle through the needle tube; after the needle tube reaches the target position, the piston rod is moved to drive the needle core to be separated from the needle tube, so that the needle tube and the sleeve are communicated with each other. The non-damage needle with the structure fills the needle hole of the needle tube through the needle core when the implanted drug delivery device is punctured, so that the needle core and the needle tube form a non-porous structure, the phenomenon of falling scraps in the puncturing process is reduced, the integrity of the implanted drug delivery device is enhanced, and the damage to the implanted drug delivery device is reduced.

Description

Non-destructive needle

Technical Field

The utility model relates to the technical field of medical instruments, in particular to a nondestructive needle.

Background

An implantable drug delivery device, also known as an infusion port, is an infusion device that is left in the body for a long period of time. Implantable drug delivery devices play an important role in the treatment of patients in need of chemotherapy, nutritional support, ascites or pleural effusion aspiration drainage, pain management, blood sampling, and other clinical repeated infusions or aspirations.

The general implantation type drug delivery device comprises a port body and a catheter, wherein the catheter can be implanted into a vein, an artery, an peritoneum or a vertebral canal and the like, an infusion needle pierces a sealing part on the wall of the port body, and drugs are infused into a human body or body fluid is sucked through the catheter. When the transfusion needle pierces the sealing element on the wall of the port body, the phenomenon of puncture and scrap dropping commonly called 'coring' can occur, and the damage of the implanted drug delivery device is easily caused.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides a non-destructive needle, which aims to solve the problem that a drug delivery device is easily damaged when an existing transfusion needle penetrates into the drug delivery device in the prior art.

The embodiment of the utility model provides a nondestructive needle, which comprises a needle tube and a sleeve which are communicated with each other; a needle core and a piston rod are arranged in the sleeve, and the needle core is arranged on the piston rod; the needle tube is sleeved on the needle core, the end part of the needle core extends to the outside of the needle tube, and no gap exists between the needle tube and the needle core; and under the condition that the piston rod moves relative to the sleeve, the needle core is driven to move.

Optionally, the non-destructive needle further comprises a first conduit, one end of the first conduit is communicated with the cannula, and the other end of the first conduit is used for connecting with an infusion device or a liquid extraction device.

Optionally, one end of the needle tube away from the sleeve is provided with a first conical structure, one end of the needle core away from the piston rod is provided with a second conical structure, the diameter of the end of the needle tube is gradually reduced, and the minimum diameter of the end of the needle tube is the same as that of the needle core.

Optionally, a sealing gasket is further arranged on the piston rod, and the piston rod is attached to the inner wall of the sleeve through the sealing gasket.

Optionally, the needle cannula comprises a first section and a second section, the first section and the second section being disposed at a first angle, the second section being partially nested within the cannula.

Optionally, the first angle is 90 degrees.

Optionally, the stylet is of a solid, non-porous structure.

Optionally, the first catheter is further provided with a luer connector, and the first catheter is connected with the infusion device or the liquid pumping device through the luer connector.

Optionally, the sleeve is made of transparent material.

Optionally, the stylet is made of a nickel titanium alloy material.

In the embodiment of the utility model, the needle tube is sleeved on the needle core, so that the end part of the needle core extends to the outside of the needle tube to puncture the implantable drug delivery device, no gap exists between the needle tube and the needle core, and during the process of puncturing the implantable drug delivery device, the falling scraps on the implantable drug delivery device are reduced to enter the non-destructive needle through the needle tube; after the needle tube reaches the target position, the piston rod is moved to drive the needle core to be separated from the needle tube, so that the needle tube and the sleeve are communicated with each other. When the non-damage needle with the structure punctures the implanted drug delivery device, the needle core fills the needle hole of the needle tube, so that the needle core and the needle tube form a non-porous structure, the phenomenon of falling scraps in the puncturing process is reduced, the integrity of the implanted drug delivery device is enhanced, and the damage to the implanted drug delivery device is reduced.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive labor.

FIG. 1 is a schematic structural diagram of a non-destructive needle according to an embodiment of the present invention;

FIG. 2 is a second schematic structural view of a non-destructive needle according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of a puncture procedure of a non-destructive needle according to an embodiment of the present invention;

fig. 4 is a second schematic view of the puncture process of the non-destructive needle according to the embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The terms first, second and the like in the description and in the claims of the present invention are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It will be appreciated that the structures so used are interchangeable under appropriate circumstances such that embodiments of the utility model may be practiced in sequences other than those illustrated or described herein, and that the terms "first", "second", etc. are generally used herein as a class and do not limit the number of terms, for example, a first term can be one or more than one. In addition, "and/or" in the specification and claims means at least one of connected objects, a character "/" generally means that a preceding and succeeding related objects are in an "or" relationship.

An implantable drug delivery device, also called a port, is an infusion device that is left in the human body for a long time, and generally comprises a port body and a catheter, wherein the catheter can be implanted in a vein, an artery, an peritoneum or an intraspinal canal, and the like, an infusion needle pierces a sealing member on the wall of the port body, and a drug is infused into the human body or body fluid is pumped through the catheter.

Usually, the sealing element is made of silica gel material, when the infusion needle pierces the sealing element on the wall of the port body, part of the sealing element can enter the cutting edge of the infusion needle, the phenomenon of puncture and scrap falling occurs, commonly called as 'coring', the integrity of the sealing element is damaged, and the damage of the implanted drug delivery device is easily caused in the process of repeated infusion or suction treatment.

To solve the above problems, an embodiment of the present invention provides a nondestructive needle, referring to fig. 1, fig. 1 is a schematic structural view of a nondestructive needle provided by an embodiment of the present invention, and as shown in fig. 1, an embodiment of the present invention provides a nondestructive needle, which includes aneedle tube 10 and acannula 20 that are communicated with each other; theneedle core 30 and thepiston rod 40 are arranged in thesleeve 20, and theneedle core 30 is arranged on thepiston rod 40; theneedle tube 10 is sleeved on theneedle core 30, the end part of theneedle core 30 extends to the outside of theneedle tube 10, and no gap exists between theneedle tube 10 and theneedle core 30; the movement of thepiston rod 40 relative to thecannula 20 causes the movement of theneedle core 30.

In this embodiment, theneedle tube 10 is sleeved on theneedle core 30, so that the end of theneedle core 30 extends to the outside of theneedle tube 10 to puncture the implantable drug delivery device, and there is no gap between theneedle tube 10 and theneedle core 30, so that during the process of puncturing the implantable drug delivery device, the falling debris on the implantable drug delivery device is reduced to enter the interior of the non-damaged needle through theneedle tube 10; after theneedle tube 10 reaches the target position, theneedle tube 10 and thecannula 20 are connected to each other by moving thepiston rod 40 to separate thehub 30 from theneedle tube 10. When the non-damage needle with the structure is used for puncturing the implanted drug delivery device, theneedle core 30 is used for filling the needle hole of theneedle tube 10, so that theneedle core 30 and theneedle tube 10 form a non-porous structure, the phenomenon of falling scraps in the puncturing process is reduced, the integrity of the implanted drug delivery device is enhanced, and the damage to the implanted drug delivery device is reduced.

Specifically, as shown in fig. 1 to 4, the implantable drug delivery device includes aport body 60 and asecond catheter 70, when the non-invasive needle punctures the implantable drug delivery device, asealing member 601 on theport body 60 may be punctured, the sealingmember 601 is generally made of silicon rubber material, ahousing cavity 602 is arranged in theport body 60, thesecond catheter 70 is communicated with thehousing cavity 602, and thesecond catheter 70 may be implanted in a vein, an artery, an peritoneum or a vertebral canal; when a patient who often needs infusion or liquid extraction is treated, the implanted drug delivery device is usually implanted into a human body, and pain of the patient in the repeated infusion or suction treatment process is relieved by puncturing the implanted drug delivery device;

when the implanted drug delivery device is punctured without damage, the central position on theport body 60 is found, theneedle tube 10 is sleeved on theneedle core 30, so that the end part of theneedle core 30 extends to the outside of theneedle tube 10, in the process that theneedle core 30 and theneedle tube 10 puncture thesealing element 601, because no gap exists between theneedle tube 10 and theneedle core 30, the situation that puncture scraps are generated by thesealing element 601 is reduced, after theneedle tube 10 reaches theaccommodating cavity 602, thepiston rod 40 is pushed to enable theneedle core 30 to move towards thesleeve 20, so that theneedle core 30 is separated from theneedle tube 10, therefore, theaccommodating cavity 602, theneedle tube 10 and thesleeve 20 are communicated with each other, and drug delivery liquid in thesleeve 20 can enter theaccommodating cavity 602 through theneedle tube 10 and reaches a focus part through thesecond conduit 70. In this way, the inside diameter of theneedle tube 10 is adapted to the outside diameter of theneedle core 30 by inserting theneedle core 30 into theneedle tube 10, so as to reduce the gap between theneedle tube 10 and theneedle core 30. Compared with the existing cutting edge of the existing transfusion needle, in the process of puncturing thesealing element 601, the elastic part of the sealingelement 601 can be extruded into the cutting edge, and falling scraps are generated. The non-destructive needle provided by the utility model blocks the cutting edge of theneedle tube 10 through theneedle core 30 in the puncturing process, and after theneedle tube 10 reaches theaccommodating cavity 602, theneedle core 30 is separated from theneedle tube 10, so that medicines or body fluid can be exchanged through theneedle tube 10, thereby reducing the falling scraps on thesealing piece 601 from entering the interior of the non-destructive needle through theneedle tube 10, enhancing the integrity of the implanted drug delivery device, and further reducing the damage to the implanted drug delivery device.

Thesleeve 20 may be made of a transparent material. Thecannula 20 is configured to be transparent, so that the medical staff can observe the communication between thecannula 20 and theneedle cannula 10 after theplunger rod 40 is pushed to separate theneedle core 30 from theneedle cannula 10.

Wherein the atraumatic needle may further comprise afirst conduit 50, one end of thefirst conduit 50 being in communication with thecannula 20, the other end of thefirst conduit 50 being adapted for connection to an infusion or aspiration device.

Thefirst conduit 50 may be an infusion hose, when a patient needs infusion treatment, the infusion device is communicated with the cannula through thefirst conduit 50, theneedle tube 10 and theneedle core 30 sleeved in theneedle tube 10 pierce the sealingmember 601, after the end of theneedle tube 10 reaches theaccommodating cavity 602, thepiston rod 40 is pushed to move theneedle core 30 towards thecannula 20 so as to separate theneedle core 30 from theneedle tube 10, at this time, theneedle tube 10 is communicated with thecannula 20, and a liquid medicine in the infusion device is infused to theaccommodating cavity 602 through thefirst conduit 50, thecannula 20 and theneedle tube 10 in sequence, and then is delivered to a lesion site of the patient through thesecond conduit 70.

It should be noted that, when the patient needs the fluid-pumping treatment, the fluid-pumping device is communicated with the cannula through thefirst conduit 50, and the same technical effect can be achieved through the non-invasive needle provided by the present invention, and no further description is provided herein to avoid repetition.

Optionally, as shown in fig. 1 to 4, thefirst conduit 50 is further provided with aluer 501, and thefirst conduit 50 is connected with an infusion set or a fluid infusion set through theluer 501, so as to enhance the stability of thefirst conduit 50 when being connected with the infusion set or the fluid infusion set, and reduce the phenomenon of leakage at the connection.

Alternatively, the end of theneedle cannula 10 distal to thecannula 20 may be provided in a first tapered configuration, the end of thehub 30 distal to theplunger rod 40 may be provided in a second tapered configuration, the diameter of the end of theneedle cannula 10 is gradually reduced, and the smallest diameter of the end of theneedle cannula 10 is the same as the diameter of thehub 30.

In this embodiment, the first tapered structure may be a truncated cone-shaped structure, the second tapered structure may be a conical cone-shaped structure, the first tapered structure and the second tapered structure are adapted to reduce a gap between theneedle tube 10 and theneedle core 30, specifically, the diameter of the end of theneedle tube 10 is gradually reduced to form a truncated cone-shaped structure, theneedle core 30 may be a conical cone-shaped structure formed by gradually increasing the needle tip, the minimum diameter of the end of theneedle tube 10 is the same as the diameter of theneedle core 30, and the tapers of the first tapered structure and the second tapered structure may be the same to improve the smoothness of the connection between theneedle tube 10 and theneedle core 30. Therefore, the damage of the damage-free needle to the implantable drug delivery device in the puncture process is reduced, the phenomenon of falling scraps is reduced, and further, the damage to the implantable drug delivery device is reduced.

In another embodiment, the first tapered structure may be a frustum-shaped structure, the second tapered structure may be a pyramid-shaped structure, the cross-sectional area of the end of theneedle tube 10 gradually decreases, and the cross-sectional area of thecore 30 with the minimum cross-sectional area of theneedle tube 10 is the same, which can achieve the same technical effect and is not described herein again to avoid repetition.

Optionally, a sealinggasket 401 is further disposed on thepiston rod 40, and thepiston rod 40 is attached to the inner wall of thecasing 20 through the sealinggasket 401.

In the present embodiment, as shown in fig. 1 to 4, thepiston rod 40 is attached to the inner wall of thesleeve 20 by agasket 401 to enhance the sealing property of thesleeve 20. Specifically, theplunger rod 40 is pushed to move theneedle core 30 towards thecannula 20, so that theneedle core 30 is separated from theneedle tube 10, and the liquid medicine in the infusion device sequentially enters thecannula 20 through thefirst conduit 50; or, under the action of the liquid-extracting device, for example, blood can enter thecannula 20 through theneedle tube 10, and the sealinggasket 401 is attached to the inner wall of thecannula 20, so as to reduce the leakage of the liquid medicine or blood in thecannula 20 from the installation position of thepiston rod 40, so as to enhance the sealing performance of thecannula 20, thereby improving the safety of the non-damaged needle.

Optionally, thesyringe 10 includes afirst section 101 and asecond section 102, thefirst section 101 and thesecond section 102 being disposed at a first angle, thesecond section 102 being partially nested within thecannula 20.

In this embodiment, as shown in fig. 1 to 4, theneedle core 30 sequentially penetrates through thesecond section 102 and thefirst section 101, and the end of theneedle core 30 extends to the outside of thefirst section 101, when puncturing the implantable drug delivery device, theneedle core 30 first abuts against thesealing element 601, and under the action of external force, theneedle core 30 and thefirst section 101 of theneedle tube 10 partially puncture thesealing element 601 to reach theaccommodating cavity 602; theplunger rod 40 is then pushed to move theneedle core 30 toward thecannula 20 to separate theneedle core 30 from theneedle cannula 10. Thefirst section 101 and thesecond section 102 are arranged at a first angle, and thesecond section 102 is partially nested in thecannula 20, so that thecannula 20 and thefirst section 101 are arranged at the first angle, thecannula 20 is fixed, and the stability of the infusion or the liquid extraction process through a non-damage needle is improved.

The first angle may be 90 degrees, that is, thefirst section 101 and thesecond section 102 are vertically disposed, after thefirst section 101 of theneedle tube 10 vertically passes through thesealing member 601 to the target position of theaccommodating chamber 602, thesecond section 102 and thefirst section 101 of theneedle tube 10 are disposed at 90 degrees, thesecond section 102 and thecannula 20 may be attached to the body of the patient without using other fixing devices, so as to improve the stability of thecannula 20 when being fixed, thereby improving the safety of the non-damage needle during infusion or liquid extraction.

Wherein, theneedle core 30 can be made of nickel-titanium alloy material. Theneedle core 30 made of super elastic nitinol can be adapted to the curved shape of theneedle tube 10, as shown in fig. 3, when puncturing, theneedle core 30 can be bent 90 degrees, after theneedle tube 10 reaches the target position in thereceiving cavity 602, theplunger rod 40 is pushed to move theneedle core 30 towards thecannula 20, theneedle core 30 is separated from theneedle tube 10, as shown in fig. 4, theneedle core 30 can automatically straighten.

It should be noted that the material of thestylet 30 may also be other shape memory alloys, such as copper-zinc alloy, indium-titanium alloy, etc., which can achieve the same technical effect, and for avoiding repetition, the details are not repeated herein.

Thestylet 30 can be described as follows: as an alternative embodiment, theneedle core 30 may be a non-porous hollow structure, and the outer diameter of theneedle core 30 is the same as the inner diameter of theneedle tube 10, so that the junction between theneedle core 30 and theneedle tube 10 is smoothly transited.

As another alternative, thecore 30 may be a solid structure without holes to enhance the penetration force of the core 30, improve the stability of the device without damage during puncturing, and the junction between the core 30 and theneedle tube 10 is smoothly transitioned to reduce the occurrence of the falling debris of the device with the sealing member during puncturing, and reduce the damage to the device by providing a non-destructive needle.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the utility model as defined in the appended claims.

Claims (10)

1. An atraumatic needle, comprising: a needle tube and a cannula which are communicated with each other;

a needle core and a piston rod are arranged in the sleeve, and the needle core is arranged on the piston rod;

the needle tube is sleeved on the needle core, the end part of the needle core extends to the outside of the needle tube, and no gap exists between the needle tube and the needle core;

and under the condition that the piston rod moves relative to the sleeve, the needle core is driven to move.

2. The atraumatic needle of claim 1, further comprising a first catheter having one end in communication with the cannula and another end for connection to an infusion or aspiration device.

3. The atraumatic needle of claim 1, wherein an end of the needle cannula distal to the cannula is provided in a first conical configuration, an end of the hub distal to the plunger rod is provided in a second conical configuration, a diameter of the end of the needle cannula is tapered, and a minimum diameter of the end of the needle cannula is the same as the diameter of the hub.

4. The non-invasive needle according to claim 1, wherein a sealing gasket is further provided on the piston rod, and the piston rod is attached to the inner wall of the cannula through the sealing gasket.

5. The atraumatic needle of claim 1, wherein the needle cannula comprises a first section and a second section, the first section and the second section disposed at a first angle, the second section partially nested within the cannula.

6. The non-lossy needle of claim 5, wherein the first angle is 90 degrees.

7. The atraumatic needle of claim 1, wherein the hub is a solid structure without holes.

8. The atraumatic needle of claim 2, wherein the first catheter is further provided with a luer fitting by which the first catheter is connected with the connecting infusion device or the aspiration device.

9. The non-invasive needle according to any one of claims 1 to 8, wherein the cannula is made of a transparent material.

10. The non-invasive needle according to any one of claims 1 to 8, wherein the core is made of a nickel titanium alloy.

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