CN214907802U - Deep vein puncture assembly and deep vein puncture needle set - Google Patents

Abstract

The utility model discloses a dark venipuncture subassembly and dark venipuncture needle external member, this subassembly includes: the puncture needle is a hollow needle; and the puncture cannula is provided with a self-sealing opening, the puncture needle penetrates into the puncture cannula from the self-sealing opening, so that the far section of the puncture cannula, which is positioned at the far side of the self-sealing opening, is sleeved on the puncture needle, and the near section of the puncture cannula, which is positioned at the near side of the self-sealing opening, is communicated with the infusion catheter. The utility model provides a puncture process is more high-efficient, the higher dark vein puncture subassembly of operational safety.

Description

Deep vein puncture assembly and deep vein puncture needle set

Technical Field

The utility model relates to a medical instrument specifically is a dark venipuncture subassembly and dark venipuncture needle external member.

Background

Venipuncture catheterization is one of the means commonly used in intravenous infusion in clinic. The great veins such as subclavian vein, internal jugular vein, femoral vein and the like are usually selected for puncture catheterization. The specific steps are that firstly, the body position of a patient is placed, and a puncture point is selected; then establishing a disinfection area, carrying out local disinfection according to a sterile operation program, and paving an operation towel; followed by deep venipuncture. When deep venipuncture is carried out, a disposable puncture needle is used for puncturing veins, blood return is observed, after the smooth blood return is confirmed, the puncture needle is fixed, a guide wire is held, the guide wire is placed into the guide wire through the guide wire needle cylinder, and the puncture needle is withdrawn; then, a skin expanding needle is placed along the guide wire, and the skin expanding needle is withdrawn after the puncture channel is widened; then the deep venous catheter is placed along the guide wire, and finally the guide wire is withdrawn. In the deep venipuncture catheterization, the operation of placing a guide wire and a skin expanding needle, withdrawing the skin expanding needle, placing a catheter and withdrawing the guide wire is required, so that the steps are complicated, the efficiency is influenced, the operation is manually completed by a doctor, misoperation is easy to occur, complications are caused, and certain risks are brought to the life safety of a patient.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a dark venipuncture subassembly and dark venipuncture needle external member, the puncture process of this subassembly is more high-efficient, and operational safety is higher.

In order to solve the above technical problem, the present assembly comprises: the puncture needle is a hollow needle; and the puncture sleeve is provided with a self-sealing opening, the puncture needle penetrates into the puncture sleeve from the self-sealing opening, so that the puncture sleeve is positioned at the far section of the self-sealing opening on the far side and is sleeved on the puncture needle, and the puncture sleeve is positioned at the near section of the self-sealing opening on the near side and is used for being communicated with the infusion catheter.

In some embodiments, the portion of the puncture cannula provided with the self-sealing aperture is made of butyl rubber.

In some embodiments, the self-sealing aperture of the puncture cannula is a one-way valve that can be opened to the inside of the puncture cannula.

In some embodiments, a wall of the puncture cannula proximal to the distal end of the puncture cannula is perforated with a through hole.

In some embodiments, the distal end of the needle is beveled, and the proximal end of the beveled surface extends beyond the tip of the distal section of the penetrating cannula by a distance of less than 1 mm.

In some embodiments, the self-sealing aperture is spaced apart from the distal end of the puncture cannula by a distance of 4-20 cm.

In some embodiments, the self-sealing aperture is spaced from the distal end of the puncture cannula by a distance of 6-15 cm.

In some embodiments, at least two longitudinally extending channels are provided within the puncture cannula, and the self-sealing aperture is provided in an outer wall of one of the at least two channels.

In some embodiments, an end of the puncture needle proximal to the puncture cannula is connected to the connection portion.

In some embodiments, the at least two channels of the puncture cannula are connected with at least two infusion catheters, respectively.

In some embodiments, the outer diameter of the distal end of the penetrating cannula tapers to the same inner diameter as the penetrating cannula toward the tip.

The utility model also provides a deep vein puncture needle kit, comprising a deep vein puncture assembly according to any one of the preceding claims and an injector,

wherein the injector comprises a syringe, a plunger and an injection rod, the injection end of the syringe is connected with the connecting part of the puncture needle near the puncture cannula, so that the injection cavity of the syringe is communicated with the hollow channel of the puncture needle in a fluid way, the other end of the syringe is closed by the plunger, and the plunger is connected with the injection rod, is arranged in the syringe in a sliding way and is sealed relative to the syringe.

In some embodiments, a catheter is provided in the injector, a distal end of the catheter passes through the injection end of the syringe barrel and is fixed in a sealing manner relative to the injection end, and a proximal section of the catheter passes through the through holes in the plunger and the injection rod in sequence and can slide in a sealing manner relative to the through holes, so that a channel in the catheter is communicated with the hollow channel of the puncture needle.

In some embodiments, the wall of the catheter, which is positioned in the injection cavity and is close to the injection end, is provided with a through hole.

In some embodiments, a distally openable one-way valve is provided within the proximal section of the catheter or proximal end of the through bore of the injection rod.

Compared with the prior art, the utility model discloses simplified the puncture process, simplified into puncture-pushed catheter with prior art's puncture-put the seal wire-expand the skin-put infusion catheter's step, avoided the puncture point that probably appears in the operation process to shift, the seal wire is deviate from, expand bad condition such as skin too dark, when improving the puncture success rate, effectively reduced operating time.

Drawings

Fig. 1 is a schematic structural view of a deep venipuncture assembly according to an embodiment of the present invention;

FIG. 2 is an enlarged view of a portion A of FIG. 1;

FIG. 3 is another variation of the puncture cannula in local position A of FIG. 1;

FIG. 4 is a cross-sectional view B-B of FIG. 1;

FIG. 5 is a schematic structural view of another variation of the local position C of FIG. 2;

FIG. 6 is a schematic structural view of a deep venipuncture assembly including a syringe cartridge in accordance with an embodiment of the present invention;

fig. 7 is a schematic structural view of another variation of an injection cartridge of an embodiment of the present invention.

Detailed Description

Various embodiments of the present invention will be described in detail below with reference to the accompanying drawings so that the objects, features and advantages of the invention can be more clearly understood. It should be understood that the embodiments shown in the drawings are not intended as limitations on the scope of the invention, but are merely illustrative of the true spirit of the technical solution of the invention.

In the following description, for the purposes of illustrating various disclosed embodiments, certain specific details are set forth in order to provide a thorough understanding of the various disclosed embodiments. One skilled in the relevant art will recognize, however, that the embodiments may be practiced without one or more of the specific details. In other instances, well-known devices, structures and techniques associated with this application may not be shown or described in detail to avoid unnecessarily obscuring the description of the embodiments.

Throughout the specification and claims, the word "comprise" and variations thereof, such as "comprises" and "comprising," are to be understood as an open, inclusive meaning, i.e., as being interpreted to mean "including, but not limited to," unless the context requires otherwise.

Reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. Thus, the appearances of the phrases "in one embodiment" or "in an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

As used in this specification and the appended claims, the singular forms "a", "an", and "the" include plural referents unless the context clearly dictates otherwise. It should be noted that the term "or" is generally employed in its sense including "and/or" unless the context clearly dictates otherwise.

In the following description, for the sake of clarity, the structure and operation of the present invention will be described with the aid of directional terms, but the terms "front", "rear", "left", "right", "outer", "inner", "outer", "inward", "upper", "lower", etc. should be understood as words of convenience and not as words of limitation. As used herein, the terms "distal" and "proximal" in the context of "distal", "proximal", and "proximal" refer to positions relative to the operator of the needle assembly that are "proximal" toward the operator and "distal" away from the operator.

The deep vein puncture assembly of the present invention is described below with reference to the accompanying drawings, and as shown in fig. 1 and 2, the assembly includes a puncture needle 1, a puncture cannula 2, and an infusion tube 3. The puncture needle 1 is a hollow needle. The puncture cannula 2 is provided with a self-sealing opening 4, and the puncture needle 1 penetrates into the puncture cannula 2 from the self-sealing opening 4. The puncture cannula 2 has a distal section 21 located distally from the self-sealing opening 4 and fitted over the puncture needle 1, and a proximal section 22 located proximally from the self-sealing opening 4 and communicating with the infusion catheter 3. The portion of the puncture cannula 2 provided with the self-sealing opening 4 may be made of a self-sealing material such as butyl rubber, or may be a one-way valve that can be opened only toward the inner side of the puncture cannula 2, so that the puncture needle 1 can penetrate through the one-way valve into the puncture cannula 2, thereby sleeving the puncture cannula 2 on the puncture needle 1, and when the puncture needle 1 is withdrawn from the puncture cannula 2, the self-sealing opening 4 can be automatically sealed, forming a channel sealed from the outside in the puncture cannula 2.

Specifically, the puncture needle 1 may be a hollow needle made of medical stainless steel, or may be made of other materials. The far end of pjncture needle 1 is equipped with the scarf, and the distal end of this scarf forms the pointed end to in the body tissue of penetrating, the inside of pjncture needle 1 has the hollow passage that supplies the liquid circulation, and after pjncture needle 1 succeeded in the puncture and gets into the deep vein, blood can be because of drawing liquid negative pressure and the hollow passage of pjncture needle 1 of the reason of deep intravenous blood pressure, and the near-end of pjncture needle 1 still is equipped with connecting portion 7, and other devices accessible connecting portion 7 and pjncture needle 1 are inside to be communicate. At the moment, whether the puncture needle 1 is successfully punctured in place can be judged by visual inspection or connection of blood pressure testing equipment. The puncture needle 1 enters the puncture cannula 2 from the self-sealing opening 4 and extends in the puncture cannula 2 until the distal section 21 at the far side of the self-sealing opening 4 is sleeved on the puncture needle 1, wherein the proximal end of the oblique section of the puncture needle 1 exceeds the tip of the distal section 21 of the puncture cannula 2. Preferably, the proximal end of the bevel of the needle 1 extends beyond the tip of the distal section 21 of the penetrating cannula 2 by a distance less than 1 mm. It is understood that the distance range may be longer or shorter, as desired. Therefore, the oblique section of the puncture needle 1 is exposed out of the puncture sleeve 2, so that the puncture needle 1 can conveniently puncture skin and tissues to enter a deep vein, and meanwhile, the difficulty in pushing the puncture sleeve 2 is not increased due to too long distance. In some embodiments, as shown in FIG. 3, the puncture cannula is provided with one or more through holes 23 near its distal end, and when the distal end of the puncture cannula hits the wall or is blocked, the purpose of infusion can still be accomplished through the through holes 23. In addition, the proximal section 22 of the puncture cannula 2 located proximal to the self-sealing aperture 4 communicates with the infusion catheter 3. In particular, the proximal end of the proximal section 22 of the puncture cannula 2, i.e. the proximal end of the puncture cannula 2, is connected to the infusion catheter 3.

One passage may be provided in the puncture cannula 2, but in some embodiments two passages are provided in the puncture cannula 2 extending longitudinally. Specifically, as shown in FIG. 4, the first channel 24 and the second channel 25 may be separated by a septum layer 26 extending longitudinally along the length of the puncture cannula 2, and the self-sealing aperture 4 may be provided in an outer wall of the first channel 24. The puncture needle 1 enters the first channel 24 through the self-sealing aperture 4 and does not puncture into the second channel 25. It will be appreciated that the self-sealing aperture 4 may be provided in the outer wall of the second channel 25, and that the needle 1 may likewise pass through the self-sealing aperture 4 into the second channel 25 without piercing into the first channel 24. The first channel 24 and the second channel 25 may be connected to two infusion catheters 3, respectively, at the proximal ends of the two infusion catheters 3, for example to a respective infusion source and a blood pressure test device, respectively, for infusion and pressure measurement, respectively. It is understood, however, that one, three or more passages may be provided in the puncture cannula 2, without limitation. Through set up a plurality of passageways in puncture sleeve pipe 2, be connected with a plurality of infusion pipe 3 respectively, can be suitable for various application scenarios for multithread operation is more convenient.

The passage of the puncture cannula 2 can be formed directly in one piece with the infusion catheter 3 or can be connected via an infusion connector 5. In the illustrated embodiment, the puncture cannula 2 and the infusion tube 3 are provided with a fixing button 6 on the outer sleeve, and the fixing button 6 can be fixed to the skin by means of a suture or an application. The securing position is preferably at the interface of the puncture cannula 2 and the skin puncture site, but is not limited to the exposed skin portion of the puncture cannula 2 and the fluid conduit 3. The fixing button 6 is used for fixing to prevent the catheter from shaking, falling off or being folded and twisted so as to influence the transfusion. At the proximal end of the infusion line 3, a connector 31 is provided, with which connector 31 different working devices, such as an infusion fluid source, a blood pressure measuring device, etc., can be connected. The joint 31 can also be sealingly blocked when left unused.

When a user operates the deep vein puncture assembly, after the puncture needle 1 is successfully punctured into a deep vein, the distal section 21 of the puncture sleeve 2 is slowly sent into the deep vein for a short distance towards the far side, then the puncture sleeve 2 is continuously sent into the deep vein, meanwhile, the puncture needle 1 is slowly withdrawn towards the near side, and after the puncture sleeve 2 is kept for a proper distance, the puncture sleeve can be sleeved on the infusion catheter 3 or the part of the puncture sleeve 2 exposed out of the skin, preferably the junction of the puncture sleeve 2 and the skin puncture point, but not limited to the exposed skin part of the puncture sleeve 2 and the infusion catheter 3. Is fixed to the skin of a patient by a suture or a patch, and the liquid medicine can be pushed to pass through the near section 22 and the far section 21 of the puncture cannula 2 by the infusion catheter 3 so as to enter the deep vein, thereby completing the liquid injection operation, or simultaneously performing the operations of liquid injection, pressure measurement and the like by utilizing a multi-way connector. The utility model discloses dark venipuncture subassembly has simplified the puncture process, retrencies into puncture-pushes away and puts the pipe with prior art's puncture-put the seal wire-expand the skin-put infusion catheter's step, and the puncture point that avoids probably appearing in the operation process shifts, the seal wire is deviate from, expand bad condition such as skin too dark, when improving the puncture success rate, has effectively reduced operating time.

In addition, the distal end of the puncture cannula 2 is spaced apart from the self-sealing aperture 4 by a distance of 4-20cm, preferably 6-15 cm. When the distance is too large, the difficulty of the puncture operation increases, and when the distance is too small, the distal section of the puncture cannula 2 is difficult to completely penetrate into the subcutaneous tissue and is left in the deep vein, thereby increasing the risk of prolapse. The proximal end of the puncture cannula 2 is spaced from the self-sealing aperture 4 by a distance of 10-15cm, preferably 12 cm. The self-sealing aperture 4 of the puncture cannula 2 may be a hole formed in the self-sealing material or a one-way valve. That is, the self-sealing aperture 4 prevents the liquid within the puncture cannula 2 from leaking out of the tube through the aperture or one-way valve after the puncture cannula 2 is inserted into or removed from the self-sealing aperture 4, thereby forming a self-sealing structure. The portion of the puncture cannula 2 provided with the self-sealing aperture 4 may be made of butyl rubber material or other materials, which are not limited herein. It should be noted that the position of the self-sealing opening 4 may be maintained outside the body or inside the body during the whole injection operation, which is not limited herein.

In some embodiments, as shown in FIG. 5, the proximal end of the beveled surface of the needle 1 extends beyond the tip of the distal section of the penetrating cannula 2 by less than 1 mm. The outer diameter of the distal end of the puncture cannula 2 is gradually reduced and intersects the inner surface of the puncture cannula 2 at the tip, that is, the outer diameter thereof is gradually reduced to be the same as the inner diameter thereof, and the inner diameter of the puncture cannula 2 may be set to be not smaller than the outer diameter of the puncture needle 1. It should be noted that the inner diameter of the distal section of the puncture cannula 2 and the outer diameter of the puncture needle 1 are kept constant along their length. After the puncture needle 1 enters the puncture sleeve 2 and the proximal end of the bevel plane of the distal end of the puncture sleeve 2 exceeds the tip of the puncture sleeve 2, the outer diameter of the distal end of the puncture sleeve 2 gradually shrinks to be the same as the inner diameter of the distal end of the puncture sleeve, and the outer surface of the assembly consisting of the puncture needle 1 and the puncture sleeve 2 is a continuous surface, so that the puncture needle 1 and the puncture sleeve 2 can conveniently penetrate into a deep vein together. After the puncture needle 1 enters the deep vein, the puncture cannula 2 is connected with the deep vein and enters the skin. After the puncture is finished, the puncture cannula 2 is manually pushed forwards slowly for a certain distance and the puncture needle 1 is withdrawn, so that the puncture cannula 2 is not driven to be withdrawn together, and the puncture cannula 2 stays in the deep vein, thereby continuing the subsequent injection operation. Through the structure, the puncture needle can be effectively prevented from moving relative to the puncture side catheter 2 in the process of entering the deep vein, and meanwhile, the puncture side catheter 2 is taken out in the process of reversely exiting the deep vein, so that the structure is simple, and the operation is convenient.

The embodiment of the utility model provides a deep vein pjncture needle external member is still provided, as shown in fig. 6, the external member includes according to the deep vein puncture subassembly in above-mentioned embodiment to and still include an injector, the injector includes injection tube 8, plunger 9 and injection pole 10, injection end 81 of injection tube 8 is connected with the connecting portion 7 that is located puncture sleeve 2 near side of pjncture needle 1. After the connection is completed, the chamber 82 of the syringe 8 is in fluid communication with the hollow channel of the puncture needle 1, while the other end of the syringe 8 is closed by a plunger 9, the plunger 9 being fixedly connected to said injection rod 10 and slidably arranged inside the syringe 8 and sealed with respect to the syringe 8. The utility model discloses dark venipuncture subassembly has simplified the puncture process, retrencies into puncture-pushes away and puts the pipe with prior art's puncture-put the seal wire-expand the skin-put infusion catheter's step, and the puncture point that avoids probably appearing in the operation process shifts, the seal wire is deviate from, expand bad condition such as skin too dark, when improving the puncture success rate, has effectively reduced operating time.

In a more preferred embodiment, as shown in figure 7, the syringe is further provided with a guide tube 11, the distal end of the guide tube 11 passing through the injection end 81 of the barrel 8 and being sealingly fixed relative to the injection end 81, and the proximal end of the guide tube 11 passing through, and being sealingly slidable relative to, the through-going bores in the plunger and the injection rod, in turn, to allow the plunger 9 and the injection rod 10 to slide relative to the barrel 8 and the guide tube 11. The distal end of the catheter 11 and the proximal end of the puncture needle 1 may be connected to each other so that the passage in the catheter 11 communicates with the hollow passage of the puncture needle 1.

The wall of the catheter 11 in the injection chamber 82 near the injection end 81 is provided with a through hole 91, so that when the puncture needle 1 penetrates into a deep vein, blood can pass through the catheter 11 and enter the injection chamber 82 through the through hole 91 for the operator to observe. A one-way valve 12, which can be opened only distally, can be provided in the proximal end of the catheter 11 or in the proximal end of the through-going bore of the injection rod 10, the one-way valve 12 ensuring that the guide wire can be inserted from the proximal end and that the injection lumen 82 is sealed off from the outside when no guide wire is inserted. Adopt this structure, can put into the hollow channel of pipe 11 and pjncture needle 1 with the seal wire, accomplish through prior art's method and put steps such as pipe, regard as with this the utility model discloses the additional method of embodiment scheme, with in the operation the utility model discloses take place for example under puncture cannula damages or do not follow the unexpected situation such as the pjncture needle entering deep vein, still can put into the seal wire and change into and adopt prior art's puncture method, avoid puncturing again and waste rescue time. The scheme provides an alternative scheme, and meets the condition of placing the guide wire in special needs.

While the preferred embodiments of the present invention have been described in detail above, it should be understood that aspects of the embodiments can be modified, if necessary, to employ aspects, features and concepts of the various patents, applications and publications to provide yet further embodiments.

These and other changes can be made to the embodiments in light of the above detailed description. In general, in the claims, the terms used should not be construed to be limited to the specific embodiments disclosed in the specification and the claims, but should be construed to include all possible embodiments along with the full scope of equivalents to which such claims are entitled.

Claims (14)

1. A deep vein puncturing assembly, comprising:

the puncture needle is a hollow needle; and

the puncture sleeve, be equipped with the self sealss trompil on the puncture sleeve, the pjncture needle is followed the self sealss trompil penetrates in the puncture sleeve, make the puncture sleeve be located the distal section cover of self sealss trompil is established on the pjncture needle, just the puncture sleeve be located the near section of self sealss trompil near side is used for and the infusion pipe intercommunication.

2. The deep vein puncture assembly of claim 1, wherein the portion of the puncture cannula provided with the self-sealing aperture is made of butyl rubber.

3. The deep vein puncture assembly of claim 1, wherein the self-sealing aperture of the puncture cannula is a one-way valve that is openable to an inside of the puncture cannula.

4. The deep vein puncture assembly of claim 1, wherein a wall of said puncture cannula proximal to said distal end of said puncture cannula has a through hole formed therein.

5. The deep vein puncture assembly of claim 1, wherein the distal end of said puncture needle is provided with a beveled surface, and the proximal end of said beveled surface extends beyond the tip of said distal section of said puncture cannula by a distance of less than 1 mm.

6. The deep vein puncturing assembly of claim 1, wherein the self-sealing aperture is spaced apart from the distal end of the puncture cannula by a distance of 4-20 cm.

7. The deep vein puncture assembly of claim 6, wherein said self-sealing aperture is spaced from said puncture cannula distal end by a distance of 6-15 cm.

8. The deep vein puncture assembly of claim 1, wherein at least two longitudinally extending channels are provided in the puncture cannula, and wherein the self-sealing aperture is provided in an outer wall of one of the at least two channels.

9. The deep vein puncturing assembly of claim 8, wherein the at least two channels of the puncturing cannula are connected to at least two infusion catheters, respectively.

10. The deep vein puncturing assembly of claim 5, wherein an outer diameter of a distal end of the puncturing cannula tapers to the same inner diameter as the puncturing cannula toward the tip.

11. A deep vein puncture needle kit comprising the deep vein puncture assembly and the syringe according to any one of the preceding claims 1 to 10,

the injector comprises an injection tube, a plunger piston and an injection rod, wherein the injection end of the injection tube is connected with the near end of the puncture needle through a connecting part, so that an injection cavity of the injection tube is communicated with the hollow channel of the puncture needle in a fluid mode, the other end of the injection tube is closed by the plunger piston, and the plunger piston is fixedly connected with the injection rod, can be arranged in the injection tube in a sliding mode and is sealed relative to the injection tube.

12. The deep vein puncture needle kit of claim 11, wherein a catheter is provided in the syringe, a distal end of the catheter passes through the injection end of the syringe barrel and is sealingly fixed relative to the injection end, and a proximal section of the catheter passes through the through-holes in the plunger and the injection rod in sequence and is sealingly slidable relative to the through-holes such that the channel of the catheter communicates with the hollow channel of the puncture needle.

13. The deep vein puncture needle assembly of claim 12, wherein the wall of the catheter inside the injection cavity near the injection end is provided with a through hole.

14. A deep vein puncture needle set according to claim 12, wherein a distally openable one-way valve is provided in the proximal section of the catheter or the proximal end of the through hole of the injection rod.

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