CN211094168U

CN211094168U - Safety blood taking needle

Info

Publication number: CN211094168U
Application number: CN201921877146.9U
Authority: CN
Inventors: 胡月
Original assignee: Union Hospital Tongji Medical College Huazhong University of Science and Technology
Current assignee: Union Hospital Tongji Medical College Huazhong University of Science and Technology
Priority date: 2019-11-04
Filing date: 2019-11-04
Publication date: 2020-07-28
Anticipated expiration: 2029-11-04

Abstract

The utility model relates to the field of medical appliances, and discloses a safety blood taking needle, which comprises a needle tube, a catheter seat and a needle tube seat; a conical cavity is arranged in the catheter seat, and sliding grooves are formed in the two sides of the catheter seat; one end of the conduit is fixed on the conduit seat; the needle tube seat comprises a main body and two side wings, wherein the main body is consistent with the shape of the conical cavity and is inserted into the conical cavity, and the side wings are positioned on two sides of the main body and positioned outside the catheter seat; the end part of the side wing is provided with a sliding part which is positioned in the sliding groove and slides; one end of the needle tube is fixed on the main body, passes through the catheter seat and is coated by the catheter; when not used, at least part of the needle tube is not coated, and the uncoated length is less than that of the sliding chute; the catheter enters the blood vessel along with the puncture of the needle tube. The utility model discloses simple structure need not extra operation and does not expose when can making the needle tubing withdraw from the blood vessel, has improved the security.

Description

Safety blood taking needle

Technical Field

The utility model relates to the field of medical appliances, in particular to a safety blood taking needle.

Background

Venous blood collection is a general medical item in hospitals, and is generally performed by a venous blood collection needle when venous blood collection is performed. Medical personnel need extract the syringe needle after the blood sampling is accomplished, but, because the syringe needle exposes outside, stabs medical personnel easily, makes medical personnel infected by patient's blood, brings very big potential safety hazard for medical personnel.

The existing anti-acupuncture blood taking needle mostly adopts the technical scheme that a needle tube is retreated from a blood vessel and then is subjected to protection treatment, and an elastic component is mostly adopted to assist in completing the anti-acupuncture process.

The Chinese patent CN109549653A discloses a puncture-proof venous blood taking needle, which adopts an elastic device, needs more spare and accessory parts and is complex to assemble. After the medical staff finishes blood sampling, the needle tube is withdrawn from the blood vessel, the elastic key is required to be pressed, and the operation steps are increased. And in the process that the needle tube is withdrawn from the blood vessel to be accommodated by the elastic device, the needle tube is still exposed outside, so that the potential safety hazard cannot be completely eliminated.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

The utility model provides a safe type blood taking needle, simple structure has, convenient operation, and the needle tubing is by advantages such as cladding after withdrawing from the blood vessel, has solved the following problem of current blood taking needle: the number of spare and accessory parts is large, and the assembly is complex; the operation is inconvenient; the blood taking needle is still exposed after exiting the blood vessel.

(II) technical scheme

In order to achieve the above object, the utility model provides a following technical scheme: comprises a needle tube, a guide tube seat and a needle tube seat; a conical cavity is arranged in the catheter seat, and sliding grooves are formed in two sides of the catheter seat; one end of the catheter is fixed on the catheter seat; the needle tube seat comprises a main body and two side wings, the main body is consistent with the shape of the conical cavity and is inserted into the conical cavity, and the two side wings are respectively positioned on two sides of the main body and positioned outside the catheter seat; one end of the side wing extends inwards to form a sliding part, and the sliding part is positioned in the sliding groove and slides along the sliding groove; one end of the needle tube is fixed on the main body, and when the main body is inserted into the conical cavity, the needle tube penetrates through the catheter seat and is covered by the catheter; when the sliding part slides to the side edge of the sliding chute close to the catheter, at least part of the needle tube is not covered by the catheter, and the length of the uncovered part is smaller than that of the sliding chute; the catheter is punctured into a blood vessel along with the needle tube.

Preferably, the needle tube seat is further provided with a needle handle, the needle handle is located above the needle tube seat and outside the catheter seat, and the needle handle is fixed on the needle tube seat through a supporting portion.

Preferably, the sliding groove is rectangular.

Preferably, the side flaps are elastic.

Preferably, the material of the conduit is fluorinated ethylene propylene copolymer.

(III) advantageous effects

Compared with the prior art, the utility model provides a safe type blood taking needle possesses following beneficial effect:

1. the needle tube is covered in the catheter, the catheter enters the blood vessel along with the needle tube, and the catheter is covered by the catheter after the needle tube exits the blood vessel and cannot be exposed outside;

2. medical personnel only need to puncture the needle tube into the blood vessel according to the normal blood sampling action, and pull out the needle tube after the blood sampling is finished, so that no additional operation is needed;

3. during installation, the needle tube is sleeved into the guide tube, and spare and accessory parts such as an elastic device are not required to be installed, so that the number of parts is reduced, and the assembly complexity is reduced.

Drawings

Fig. 1 is a schematic structural view of the present invention;

fig. 2 is a front view of the needle cannula holder of the present invention.

In the figure: 1. a conduit; 2. a needle tube; 3. a catheter hub; 4. a needle tube base; 31. a chute; 311. a first side wall; 312. a second side wall; 41. a main body; 42. a side wing; 43. a sliding part; 44. a needle handle; 45. a support portion.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

As shown in figure 1, the safety blood taking needle provided by the embodiment of the utility model comprises a needle tube 2, a catheter 1, a catheter holder 3 and a needle tube holder 4.

One end of the catheter 1 is fixed on the catheter seat 3, a conical cavity is arranged inside the catheter seat 3, and one end of the needle tube 2 is fixed on the needle tube seat 4. The shape of the main body 41 of the needle tube seat 4 is the same as that of the conical cavity, when the needle tube seat 4 is assembled, the needle tube seat is inserted into the conical cavity, the main body 41 and the conical cavity are tightly matched together, and the conical cavity plays a role in blocking. The needle tube 2 passes through the catheter seat 3 in the assembling process, the catheter 1 is covered outside the needle tube 2, and at least part of the needle tube 2 is exposed outside, so that the puncture is convenient to complete.

Sliding grooves 31 are formed in two sides of the catheter seat 3, and the sliding grooves 31 are rectangular; the needle hub 4 is provided with flanks 42 on both sides. One end of the side wing 42 extends inward to form a sliding portion 43. The main body 41 is inserted into the tapered cavity, the lateral wings 42 being located outside the catheter hub 3; the sliding portion 43 is inserted into the slide groove 31 so that the sliding portion 43 can slide along the slide groove 31. When the sliding part 43 slides to the side of the sliding chute 31 close to the catheter 1, i.e. the first side wall 311, the main body 41 and the inner wall of the catheter hub 3 are tightly attached, and at least part of the needle tube 2 is not covered by the catheter 1, and the length of the uncovered part is smaller than that of the sliding chute 31.

When the blood sampling is carried out, the needle tube 2 is punctured into a blood vessel, at the moment, the needle tube 2 is forced forwards, but the main body 41 is blocked by the conical cavity, so that the catheter 1 is punctured into the blood vessel along with the needle tube 2. When the needle tube 2 needs to be pulled out, the needle tube 2 is withdrawn backward, the sliding part 43 slides along the sliding chute 31, and when the sliding part 43 is blocked by the second side wall 312 of the sliding chute 31, the catheter 1 is withdrawn out of the blood vessel together with the needle tube 2. The length of the chute 31 is set to be longer than the length of the portion of the needle tube 2 not covered with the catheter 1, and the needle tube 2 is completely covered with the catheter 1 when the slider 43 just contacts the second sidewall 312 during the needle withdrawing process. After the blood vessel is withdrawn, the needle tube 2 is completely covered by the catheter 1 and is not exposed outside, so that the safety of the blood taking needle is improved.

The needle tube seat 4 is formed by one-step molding, and the end parts of the two side wings 42 are inwardly offset by a small distance during manufacturing. When the sliding part 43 is fitted into the slide groove 31, the side wing 42 is slightly deformed to have elasticity, so that the sliding part 43 exerts an inward force on the bottom of the slide groove 31 to prevent the needle holder 4 from sliding down without affecting smooth sliding.

The catheter 1 is a soft catheter and can be made of materials for making an indwelling needle, such as common poly plastics, teflon, fluorinated ethylene propylene copolymer and the like. Considering that the catheter 1 does not need to be left in the blood vessel and needs to be prevented from being pierced by the needle tube 2, a certain hardness is required, and therefore, it is preferable to use a fluorinated ethylene propylene copolymer having excellent self-lubricity, blood compatibility, biological and chemical stability, and good processability.

As shown in fig. 2, the needle holder 4 is further provided with a needle handle 44 for facilitating grasping of the blood collection needle during blood vessel puncture. Since most of the needle tube seat 4 is sleeved in the catheter seat 3, and the needle handle 44 needs to be located outside the catheter seat 3, the needle handle 44 and the needle tube seat 4 can be connected together through the supporting portion 45.

The working principle of the safety blood taking needle of the embodiment is as follows: holding the needle handle 44, puncturing the needle tube 2 into the blood vessel, and driving the catheter 1 into the blood vessel under the blocking action of the conical cavity; when the needle tube 2 is withdrawn, the needle tube 2 is pulled outwards all the time only according to the existing operation, and the needle tube 2 and the catheter 1 are withdrawn from the blood vessel together under the matching of the sliding part 43 and the sliding chute 31; due to the reasonable design of the length of the sliding chute 31, the needle tube 2 is completely covered by the catheter 1 when exiting the blood vessel and is not exposed outside.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, 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 identical elements in a process, method, article, or apparatus that comprises the element.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. Safety type blood taking needle, its characterized in that: comprises a needle tube, a guide tube seat and a needle tube seat; a conical cavity is arranged in the catheter seat, and sliding grooves are formed in two sides of the catheter seat; one end of the catheter is fixed on the catheter seat; the needle tube seat comprises a main body and two side wings, the main body is consistent with the shape of the conical cavity and is inserted into the conical cavity, and the two side wings are respectively positioned on two sides of the main body and positioned outside the catheter seat; one end of the side wing extends inwards to form a sliding part, and the sliding part is positioned in the sliding groove and slides along the sliding groove; one end of the needle tube is fixed on the main body, and when the main body is inserted into the conical cavity, the needle tube penetrates through the catheter seat and is covered by the catheter; when the sliding part slides to the side edge of the sliding chute close to the catheter, at least part of the needle tube is not covered by the catheter, and the length of the uncovered part is smaller than that of the sliding chute; the catheter is punctured into a blood vessel along with the needle tube.

2. A safety blood lancet according to claim 1, wherein: the needle tube seat is further provided with a needle handle, the needle handle is located above the needle tube seat and outside the catheter seat, and the needle handle is fixed on the needle tube seat through a supporting portion.

3. A safety blood lancet according to claim 1, wherein: the sliding groove is rectangular.

4. A safety blood lancet according to claim 1, wherein: the side flaps are elastic.

5. A safety blood lancet according to claim 1, wherein: the material of the conduit is fluorinated ethylene propylene copolymer.