CN215651440U - Self-expanding type nondestructive needle - Google Patents

Abstract

The embodiment of the utility model provides a self-expanding non-damage needle, which comprises a puncture needle and a first catheter communicated with the puncture needle; the puncture needle comprises a needle tip part and a needle tube part, two ends of the needle tube part are respectively connected with the needle tip part and the first catheter, and a pre-expansion structure is arranged at the position, close to the needle tip part, of the needle tube part; the pre-expansion structure is in an expansion state under the condition of no external force action, and the interior of the puncture needle is communicated with the exterior of the puncture needle through a gap generated by the pre-expansion structure in the expansion state; the pre-expansion structure is in a non-expansion state under the condition of radial acting force, the gap is closed, and the inside of the puncture needle is isolated from the outside of the puncture needle. Therefore, the passing performance of the puncture needle is improved, the falling scraps on the target object are reduced to enter the puncture needle, and the safety of the self-expanding non-damage needle in the process of infusion or liquid extraction is further improved.

Description

Self-expanding type nondestructive needle

Technical Field

The utility model relates to the technical field of medical instruments, in particular to a self-expanding non-damage 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. However, when the transfusion needle pierces the sealing element on the wall of the port body, the phenomenon of puncture and scrap dropping, commonly called as coring, can occur, the integrity of the sealing element is damaged, and the service life of the implanted drug delivery device is shortened in the process of repeated infusion or suction treatment; and, the produced puncture debris may enter the human body along the catheter, and the safety is low.

Therefore, the existing transfusion needle has the problem of low safety.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides a self-expanding non-damage needle, which aims to solve the problem of low safety of an infusion needle in the prior art.

The embodiment of the utility model provides a self-expanding non-damage needle, which comprises a puncture needle and a first catheter communicated with the puncture needle; the puncture needle comprises a needle tip part and a needle tube part, two ends of the needle tube part are respectively connected with the needle tip part and the first catheter, and a pre-expansion structure is arranged at the position, close to the needle tip part, of the needle tube part;

the pre-expansion structure is in an expansion state under the condition of no external force, and the interior of the puncture needle is communicated with the exterior of the puncture needle through a gap generated by the pre-expansion structure in the expansion state;

the pre-expansion structure is in a non-expansion state under the condition of radial acting force, the gap is closed, and the inside of the puncture needle is isolated from the outside of the puncture needle.

Optionally, the pre-expansion structure is formed by cutting the wall of the needle tube part along the axial direction of the needle tube part, and then performing heat treatment and cooling setting.

Optionally, at least 2 cutting lines are provided on the wall of the needle cannula portion.

Optionally, 4 cutting lines are disposed on the wall of the needle tube portion, and the 4 cutting lines are uniformly distributed on the wall of the needle tube portion.

Optionally, the needle cannula portion comprises a first section and a second section, the first section and the second section being disposed at a first angle, the pre-expansion structure being disposed in the first section, the second section being partially nested in the first conduit.

Optionally, the first angle is 90 degrees.

Optionally, the needle tip portion is of a solid structure without holes.

Optionally, the first catheter is provided with a needle shaft for securing the puncture needle in case the puncture needle reaches a target position.

Optionally, the first catheter is further provided with a luer connector for connecting an infusion device or a collection device.

Optionally, the puncture needle is made of nickel-titanium alloy.

In the embodiment, the puncture needle is provided with the pre-expansion structure, so that the pre-expansion structure is in an expansion state under the action of no external force and is in a non-expansion state under the action of radial acting force; the inside of pjncture needle is through the outside intercommunication of the clearance that the inflation structure produced under the inflation state and pjncture needle in advance, and the in-process that the puncture carried out the puncture to the target object, and the pjncture needle receives the radial effort of target object for the clearance seals, and the inside of pjncture needle is isolated with the outside of pjncture needle, thereby improves the trafficability characteristic of pjncture needle, reduces the interior that the junk on the target object got into the pjncture needle, and then improves the security that the formula of expanding does not have the damage needle and infuse or draw liquid in-process.

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 self-expanding non-destructive needle provided by an embodiment of the utility model;

FIG. 2 is a schematic view of a puncturing process of a self-expanding non-destructive needle provided by an embodiment of the present invention;

FIG. 3 is a second schematic view of the puncturing process of the self-expandable non-destructive needle according to the embodiment of the present invention;

FIG. 4 is a third schematic view of a puncturing procedure of the self-expandable non-destructive needle according to the embodiment of the present invention;

FIG. 5 is a schematic structural view of a self-expanding atraumatic needle provided in accordance with an embodiment of the present invention;

FIG. 6 is a second schematic structural view of a self-expanding atraumatic needle in accordance with an embodiment of the present invention;

fig. 7 is a third schematic structural view of a puncture needle of a self-expanding non-destructive needle according to an 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 transfusion needle pierces the sealing element on the wall of the port, part of the sealing element can enter the cutting edge of the transfusion needle, the phenomenon of puncture and scrap falling occurs, commonly called as 'coring', the integrity of the sealing element is damaged, and the service life of the implanted medicine feeder is shortened in the process of repeated infusion or suction treatment; and, the produced puncture debris may enter the human body along the catheter, and the safety is low.

To solve the above problems, an embodiment of the present invention provides a self-expandable non-damage needle, please refer to fig. 1, fig. 1 is a schematic structural diagram of a self-expandable non-damage needle provided by an embodiment of the present invention, as shown in fig. 1, including a puncture needle 10 and a first catheter 20 communicated with the puncture needle 10; the puncture needle 10 comprises a needle tip part 101 and a needle tube part 102, two ends of the needle tube part 102 are respectively connected with the needle tip part 101 and the first catheter 20, and a pre-expansion structure 103 is arranged at the position of the needle tube part 102 close to the needle tip part 101;

the pre-expansion structure 103 is in an expanded state without external force, and the inside of the puncture needle 10 communicates with the outside of the puncture needle 10 through a gap 1031 generated in the expanded state by the pre-expansion structure 103;

the pre-expansion structure 103 is in a non-expanded state with radial forces applied, the gap 1031 is closed, and the interior of the needle 10 is isolated from the exterior of the needle 10.

In the present embodiment, the pre-expansion structure 103 is arranged on the puncture needle 10, so that the pre-expansion structure 103 is in an expansion state without external force, and is in a non-expansion state under the condition of radial acting force; the inside of the puncture needle 10 is communicated with the outside of the puncture needle 10 through the gap 1031 generated by the pre-expansion structure 103 in the expansion state, the puncture needle 10 is subjected to the radial acting force of the target object in the process of puncturing the target object by the puncture needle 10, so that the gap 1031 is closed, the inside of the puncture needle 10 is isolated from the outside of the puncture needle 10, the passing performance of the puncture needle 10 is improved, the falling scraps on the target object are reduced to enter the inside of the puncture needle 10, and the safety of the self-expansion type non-damage needle in the process of transfusion or liquid pumping is improved.

The gap 1031 generated by the pre-expansion structure 103 in the expansion state is an infusion hole of the self-expansion type non-damage needle, and the inside of the puncture needle 10 is communicated with the outside of the puncture needle 10 through the gap 1031 generated by the pre-expansion structure 103 in the expansion state, so that the function of the infusion hole is realized.

As shown in fig. 1 to 4, the implantable drug delivery device comprises a port body 30 and a second catheter 40, wherein the target object can be a sealing member 301 on the port body 30, the sealing member 301 is generally made of silicon rubber, a containing cavity 302 is arranged in the port body 30, the second catheter 40 is communicated with the containing cavity 302, and the second catheter 40 can be implanted in a vein, an artery, an peritoneum or a vertebral canal;

after the implantable drug delivery device is implanted in a human body, when a patient needs to transfuse or draw fluid, the drug delivery device or the fluid drawing device is communicated with the puncture needle 10 through the first catheter 20, the central position on the port body 30 is found to puncture the puncture needle 10 into the sealing member 30, during the puncture process of the puncture needle 10, the radial acting force of the sealing member 30 drives the pre-expansion structure 103 on the puncture needle 10 to contract, as shown in fig. 2 to 3, from the expansion state to the non-expansion state so as to close the gap 1031 generated by the pre-expansion structure 103 in the expansion state, and when the pre-expansion structure 103 is completely arranged on the sealing member 30, as shown in fig. 3, the puncture needle 10 presents a smooth and non-porous state so as to reduce the falling debris on the sealing member 30 during the puncture process from entering the interior of the puncture needle 10;

after the pre-expansion structure 103 passes through the sealing element and enters the accommodating cavity 302, no external force is applied to the pre-expansion structure 103, as shown in fig. 4, the expansion state is recovered, the inside of the puncture needle 10 is communicated with the outside of the puncture needle 10 through a gap 1031 generated by the pre-expansion structure 103 in the expansion state, and the drug delivery liquid can enter the accommodating cavity 302 through the gap 1031 and is delivered to the human body through the second catheter 40;

after infusion is completed, the radial acting force of the sealing element 30 drives the pre-expansion structure 103 on the puncture needle 10 to contract to close the gap 1031 in the process of pulling out the puncture needle 10, and after the puncture needle 10 is pulled out, no external force is bound on the pre-expansion structure 103 to restore the expansion state. Therefore, the generation of falling scraps can be reduced, and the service life of the implanted drug delivery device is prolonged.

Alternatively, the pre-expansion structure 103 may be a structure formed by cutting the wall of the needle tube portion 102 in the axial direction of the needle tube portion 102, and then performing heat treatment and cooling setting.

In this embodiment, at the position where the needle tube part 102 is close to the needle tip part 101, laser cutting is performed along the axial direction of the needle tube part 102, so that a cutting edge is generated at the cutting position, and a high-temperature heat treatment and cooling setting process is performed thereon to form the pre-expansion structure 103, wherein the profile of the pre-expansion structure 103 approximates to a football;

at least 2 cutting lines are arranged on the tube wall of the needle tube part 102, the lengths of the cutting lines are equal, and the intervals between the cutting lines are equal, so that the consistency of gaps 1031 formed after high-temperature heat treatment and cooling shaping processes is enhanced, and the smoothness of the pre-expansion structure 103 after shrinkage is improved.

Specifically, 4 cutting lines may be disposed on the tube wall of the needle tube portion 102, and the 4 cutting lines are uniformly distributed on the tube wall of the needle tube portion 102, so that after the processes of high-temperature heat treatment and cooling setting are performed, the pre-expansion structure 103 has 4 gaps 1031 without external force, as shown in fig. 1 and 5 to 7, the 4 gaps 1031 have the same size and are uniformly distributed on the tube wall of the needle tube portion 102, and the inside of the puncture needle 10 is communicated with the outside of the puncture needle 10 through the 4 gaps 1031 generated by the pre-expansion structure 103 in the expansion state, so that the infusion solution flows out of the puncture needle 10 through the 4 gaps 1031.

It should be noted that, according to the diameter of the needle tube portion 102 and the thickness of the tube wall, other numbers of cutting lines may be further provided to form a corresponding number of gaps 1031, and the same technical effect may be achieved, and in order to avoid repetition, no further description is provided herein.

Optionally, the needle cannula portion 102 includes a first section and a second section, the first section and the second section being disposed at a first angle, the pre-expansion structure 103 being disposed in the first section, and the second section being partially nested within the first conduit 20.

In the present embodiment, during the puncturing process of the puncture needle 10, the first section of the needle tube 102 penetrates through the object, the second section of the needle tube 102 is partially nested in the first conduit 20 to communicate the puncture needle 10 with the first conduit 20, and after the first section of the needle tube 102 penetrates through the object to reach the target position, the first section and the second section of the needle tube 102 are disposed at the first angle, so as to fix the second section of the needle tube 102 and the first conduit 20, thereby improving the stability during the infusion or the fluid extraction process through the self-expanding non-damage needle.

Wherein, the first angle can be 90 degrees, be about to first section and the perpendicular setting of second section, after the first section of needle tubing portion 102 passed the target object perpendicularly and reached the target position, the second section and the first section of needle tubing portion 102 are 90 degrees settings, and the second section of needle tubing portion 102 can attach in patient's health, need not with the help of other fixing device to the stability when promoting second section and the first pipe 20 of needle tubing portion 102 to promote the security that self-expanding no-damage needle carried out infusion or draw liquid in-process.

The puncture needle 10 includes a needle tip portion 101 and a needle tube portion 102, and the needle tip portion 101 can be referred to as follows: as an alternative embodiment, the needle tip portion 101 may be a hollow structure, the needle tip wall of the needle tip portion 101 is the same as the tube wall thickness of the tube portion 102, and the needle tip portion 101 and the tube portion 102 may be an integral structure, so that the needle tip portion 101 and the tube portion 102 are smoothly connected.

As another alternative, the needle tip 101 may be a solid structure without holes to enhance the penetration force of the needle tip 101 and improve the stability of the puncture needle 10 during the process of puncturing the target object, and the needle tip 101 may be tapered to provide a smooth transition at the junction of the needle tip 101 and the needle portion 102 to reduce the occurrence of the sealing member 30 chipping during the puncturing process.

Alternatively, the first catheter 20 may be provided with a needle handle 201, and the needle handle 201 is used to fix the puncture needle 10 in the case where the puncture needle 10 reaches the target position.

In the present embodiment, as shown in fig. 1 to 4, a needle handle 201 is disposed on the first catheter 20, the needle handle 201 is in a butterfly wing shape, and when a patient needs infusion or fluid extraction treatment, a medical worker can hold the needle handle 201 by hand and puncture the puncture needle 10 with respect to a target object, so as to take a self-expanding non-damage needle;

after the puncture needle 10 passes through the target object to reach the target position, the first catheter 20 can be attached to the body of the patient, and the contact area between the first catheter 20 and the body of the patient is increased through the needle handle 201, so that the stability of the first catheter 20 attached to the body of the patient is enhanced, the situation that the first catheter 20 is moved randomly is reduced, and the safety of the self-expanding damage-free needle in the process of infusion or liquid drawing is improved.

The first conduit 20 can be further provided with a luer connector 202, the luer connector 202 is used for connecting an infusion set or a collection device, and the first conduit 20 is connected with the infusion set or the collection device through the luer connector 202, so that the leakage phenomenon at the connection position is reduced.

Alternatively, the material of the puncture needle 10 may be nitinol, and when the puncture needle 10 is subjected to the high-temperature heat treatment and cooling setting process, the puncture needle is more plastic, and the pre-expansion structure 103 is formed to be stable in the expansion state without external force; when the needle is in a non-expanded state when subjected to a radial force and the inside of the needle 10 is isolated from the outside of the needle 10, the clearance 1031 is more tightly closed. The falling scraps on the target object are reduced to enter the interior of the puncture needle 10, so that the safety of the self-expanding non-damage needle in the process of infusion or liquid extraction is improved.

It should be noted that the material of the puncture needle 10 may also be other shape memory alloys, such as copper-zinc alloy, indium-titanium alloy, etc., which can achieve the same technical effect, and in order to avoid repetition, the details are not repeated herein.

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. A self-expanding non-damage needle is characterized by comprising a puncture needle and a first catheter communicated with the puncture needle; the puncture needle comprises a needle tip part and a needle tube part, two ends of the needle tube part are respectively connected with the needle tip part and the first catheter, and a pre-expansion structure is arranged at the position, close to the needle tip part, of the needle tube part;

the pre-expansion structure is in an expansion state under the condition of no external force, and the interior of the puncture needle is communicated with the exterior of the puncture needle through a gap generated by the pre-expansion structure in the expansion state;

the pre-expansion structure is in a non-expansion state under the condition of radial acting force, the gap is closed, and the inside of the puncture needle is isolated from the outside of the puncture needle.

2. The self-expanding, non-damaged needle as recited in claim 1, wherein the pre-expanded configuration is a configuration formed by cutting the wall of the needle portion in the axial direction of the needle portion, and then heat treating and cooling to set.

3. The self-expanding, non-lossy needle of claim 2, wherein at least 2 cutting lines are provided on the wall of the needle cannula portion.

4. The self-expanding, non-damaged needle according to claim 3, wherein 4 cutting lines are provided on the wall of the needle cannula portion, and the 4 cutting lines are evenly distributed on the wall of the needle cannula portion.

5. The self-expanding, non-lossy needle of claim 1, wherein the needle portion comprises a first section and a second section, the first section and the second section disposed at a first angle, the pre-expanded structure disposed in the first section, the second section partially nested in the first catheter.

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

7. The self-expanding, non-lossy needle of claim 1, wherein the needle tip is of solid construction without holes.

8. The self-expanding, non-damaging needle of claim 1, wherein the first catheter is provided with a needle shaft for securing the needle in the event that the needle reaches a target location.

9. The self-expanding, non-lossy needle of claim 1 wherein the first catheter is further provided with a luer fitting for connection to an infusion or collection device.

10. The self-expanding, non-lossy needle of any of claims 1 to 9, wherein the material of the piercing needle is nitinol.

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