CN212661889U

CN212661889U - Vein puncture needle capable of directly observing puncture condition

Info

Publication number: CN212661889U
Application number: CN202020697579.2U
Authority: CN
Inventors: 陈蓉
Original assignee: Mianyang Central Hospital
Current assignee: Mianyang Central Hospital
Priority date: 2020-04-30
Filing date: 2020-04-30
Publication date: 2021-03-09
Anticipated expiration: 2030-04-30

Abstract

The utility model discloses a vein puncture needle for directly observing puncture conditions, which is used in the vein puncture operation and is used for solving the problem that whether a blood vessel is punctured can be determined only by pumping back in the prior art; the structure includes: the capillary tube is positioned in the needle tube, an observation hole is further formed in the surface of the needle tube fixed with the capillary tube, a magnifying glass is arranged at the glue holding part outside the observation hole and can magnify the observation hole, whether blood flows or not can be seen more clearly, after the capillary tube is contacted with the blood, the capillary tube can suck the blood into the observation hole under the capillary action without manual suction, the usage is simpler, a silicon bowl communicated with the capillary tube is further arranged at the part, far away from the needle head, of the glue holding part, and when the glue holding part needs to be punctured again, the blood in the capillary tube can be discharged by pressing the silicon bowl, so that the next usage is facilitated; the utility model discloses it is rational in infrastructure, do not need initiative pumpback just can see the blood return condition, it is more convenient to use.

Description

Vein puncture needle capable of directly observing puncture condition

Technical Field

The utility model belongs to the technical field of medical puncture equipment, concretely relates to vein puncture needle of direct observation puncture condition.

Background

The puncture needle is a medical instrument for sampling and injecting multiple tissues and organs such as kidney, liver and the like in minimally invasive surgery, and the venipuncture is a puncture difficult patient caused by hardening and collapsing of peripheral veins due to long-term transfusion,

The existing venipuncture method is to determine a puncture point, the needle inserting direction and the skin of a puncture part form an angle of 30-45 degrees, and the needle inserting direction conforms to the blood flow direction or is vertical to the blood flow direction, the needle is inserted while slowly puncturing by suction, when a puncture needle enters a femoral vein, venous blood flows back into an injection needle, then the needle is inserted for 2-4 nHn, so that blood can be sampled or medicaments can be injected, if the blood cannot be extracted, the needle is inserted into a deep part, and the needle is withdrawn while suction is carried out until the blood is extracted; or adjusting the puncture direction, depth or re-puncturing; the blood vessel can not be found once often in whole operation process, and is just more common to this kind of condition of non-superficial venous blood sampling, and repeated puncture can not find the blood vessel for a long time and can increase patient's misery, need the pumpback just can judge whether pierce the blood vessel in the blood sampling process moreover, and this can influence the availability factor.

The prior art provides a puncture method matched with a blood vessel imaging navigator, which can not provide the position of a blood vessel but can not provide the depth information of the blood vessel, but can still only puncture by a doctor by adopting the method in the prior art, the operation assistance of venipuncture is limited, and an additional instrument needs to be purchased, so that the use cost is increased.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a vein pjncture needle of direct observation puncture condition utilizes capillary effect from extracting a small amount of blood, consequently does not need the initiative suction also can observe the blood return condition, and then judges whether pierce the blood vessel, and does not need additionally to purchase auxiliary assembly, and the cost is lower, and it is more convenient to use.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

an intravenous puncture needle for directly observing puncture conditions, comprising: needle tube, rubber holder, capillary tube; the needle tube is a thin-walled tube made of metal, one end of the needle tube is sharpened, the other end of the needle tube is fixed at the axial position of the rubber grip, the cross-sectional area of the rubber grip is larger than the cross-sectional shape of the needle tube, the rubber grip is convenient to grip, the needle tube is fixed at one end of the rubber grip, the other end of the rubber grip is connected with the blood sampling tube in the prior art, a channel with the same cross-sectional shape as the needle tube is arranged at the axial position of the rubber grip, and the;

the capillary tube is positioned in the needle tube, the capillary tube is fixed on the inner wall of the needle tube and extends into the glue holder, one end of the capillary tube is positioned at the sharp end of the needle head, one part of the capillary tube is positioned in the needle head, the other part of the capillary tube is positioned in the glue holder, and one end of the capillary tube positioned in the glue holder is communicated with the external atmospheric pressure.

Furthermore, the cross section of the needle tube is not circular, and the cross section of the needle tube is formed by combining an arc and a plane.

Furthermore, a magnifying lens is further arranged at a position, close to the capillary tube, on the glue holder, and the magnifying lens is a convex lens with a thick middle part and two thin ends.

Further, still be provided with in the glue is held: press the chamber, press the chamber and be located the airtight cavity that glues and hold, press chamber bottom and capillary intercommunication, press chamber top surface and external intercommunication, press the intracavity and still include: the silicon bowl is reversely buckled and fixed at the connecting position of the capillary tube and the pressing cavity, the lower pressing sheet is fixed above the silicon bowl and detachably connected with the pressing sheet located outside through a circular tube, and a through exhaust passage is arranged in the circular tube connected among the silicon bowl, the lower pressing sheet, the pressing sheet and the pressing sheet of the lower pressing sheet and communicated with the outside atmosphere to form a gas passage such as the capillary tube-silicon bowl-exhaust passage.

Furthermore, the glue handle is also provided with two protruding pieces which extend outwards.

The utility model discloses following beneficial effect has at least:

(1) the external structure is the same as that of the puncture needle in the prior art, so that a user can immediately start without additional adaptation, and the use habit of the user is not influenced.

(2) The capillary tube is arranged in the needle tube, after contacting with blood, the blood can be sucked into the capillary tube under the action of capillary effect, and can be observed by a user when passing through the position of the magnifier.

(3) The rear part of the rubber grip is also provided with a pressing cavity, and when needed, blood in the capillary can be extruded out of the capillary by extruding a silicon bowl in the pressing cavity.

Drawings

The accompanying drawings, which form a part of the specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention.

In the drawings:

fig. 1 schematically shows a schematic structural view of the present invention;

FIG. 2 is a schematic cross-sectional view of the side view of the present invention;

fig. 3 schematically shows a cross-sectional view of a portion of a needle cannula according to the present invention;

fig. 4 schematically shows a partially enlarged view of a portion a in fig. 2;

wherein the figures include the following reference numerals:

1-needle tube, 2-glue handle, 21-lug, 22-magnifier, 23-silicon bowl, 24-pressing sheet, 25-pressing sheet, 26-exhaust channel, 27-pressing cavity, and 3-capillary tube.

Detailed Description

It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure; unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application; as used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

Spatially relative terms, such as "above … …," "above … …," "above … …, above," "overlying" and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures; it will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures.

Examples

As shown in fig. 1 to 4, the venipuncture needle for directly observing puncture conditions is used in venipuncture operation to solve the problem that in the prior art, withdrawal is required to determine whether a blood vessel is punctured; the structure includes: needle tubing 1, capillary 3, glue and hold 2, capillary 3 is located needle tubing 1, still be provided with the observation hole on the 1 surface of needle tubing that is fixed with capillary 3, glue outside the observation hole and hold 2 parts and be provided with magnifying glass 22, can enlarge the observation hole, more clearly see whether there is blood to flow through, capillary 3 and blood contact back, under capillary, capillary 3 can inhale blood wherein, and do not need artifical suction, it is simpler to use, hold 2 parts of keeping away from the syringe needle still to be provided with the silicon bowl 23 with capillary 3 intercommunication gluing, when needs puncture again, can also discharge the blood in capillary 3 through pressing silicon bowl 23, convenient next use.

As shown in figure 1, the needle tube 1 is a thin-wall tube made of metal, one end of which is sharpened, and is used for penetrating the skin and penetrating into the blood vessel, the other end of the needle tube 1 is fixed at the axial position of the rubber grip 2, the rubber grip 2 is a cylinder made of transparent pvc with the cross-sectional area larger than that of the needle tube 1, the cross-sectional area of the rubber grip 2 is larger, so that the needle holding operation of the user is more convenient, one end of the rubber grip 2 is fixed with the needle tube 1, the other end is connected with the blood sampling tube of the prior art, because the rubber grip 2 is the prior art, so that the detailed description is omitted, a channel with the same cross-sectional shape as that of the needle tube 1 is arranged at the axial position of the rubber grip 2, the channel is shown by a dotted line in figure 1 and is distinguished from the needle tube 1, the channel penetrates through the rubber grip 2 and is communicated with the blood sampling tube, capillary 3 material is the same with glue the material of holding 2, toughness is good, can not fracture in the use, capillary 3 fixes at 1 inner wall of needle tubing and holds 2 in to gluing and extend a section distance, and pass glue and hold 2 and external intercommunication, when needle tubing 1 passes the blood vessel, because capillary effect, blood can be inhaled in capillary 3, when getting into glue and holding 2 parts, because glue and hold 2 transparent pvc materials, so can be by direct observation to blood flow, thereby confirm the blood vessel position, avoid continuing to advance the needle and damage the blood vessel, reach better result of use.

It should be noted that: the cross-sectional shape of the needle tube 1 is not circular, as shown in fig. 3, the cross-section of the needle tube 1 is formed by combining an arc and a plane, the plane part is conveniently fixed with the capillary tube 3, the cross-sectional shape of the capillary tube 3 is also rectangular, the long side of the capillary tube 3 is in contact with the plane part of the needle tube 1, and the length of the long side of the capillary tube 3 with the rectangular cross-section is larger than that of a circular tube with the same cross-sectional area, so that the capillary tube is easier to observe when blood passes through.

As shown in fig. 2, the glue holder 2 further includes: magnifying glass 22, press chamber 27, magnifying glass 22 is the thin convex lens in thick both ends in the middle of, has the amplification, and magnifying glass 22 inlays and holds 2 in gluing, and the capillary 3 in 2 axis channels is held close to gluing to the bottom surface of magnifying glass 22, consequently enlargies 3 parts of capillary, and is more striking, when blood passes through, can be better observe by the doctor.

The pressing cavity 27 is a closed cavity in the glue holder 2, and has only two holes connected with the outside, one of the holes is located on the bottom surface of the pressing cavity 27 and communicated with the capillary tube 3, and the other hole is used for a connecting pipeline on the lower pressing sheet 24 to pass through, that is, the capillary tube 3 is communicated with the pressing part, the pressing cavity 27 is communicated with the outside, so as to communicate the capillary tube 3 with the outside, and the pressing cavity 27 further includes: a silicon bowl 23, a pressing cavity 27, a pressing piece 25, a lower pressing piece 24, wherein the silicon bowl 23 is reversely buckled and fixed at the connecting position of the capillary tube 3 and the pressing cavity 27, the lower pressing piece 24 is fixed above the silicon bowl 23, the lower pressing piece 24 is a flat round piece, a cylindrical pipeline is vertically arranged at the geometric center of the top surface of the lower pressing piece 24, the round tube passes through the glue holder 2 and is connected with the pressing piece 25 positioned outside, one end of the round tube positioned outside is detachably connected with the pressing piece 25, namely the round tube connects the pressing piece 25 with the lower pressing piece 24, the pressing piece 25 is driven to move downwards after being pressed downwards by the pressing piece 25, so as to compress and deform the silicon bowl 23, in addition, as shown in figure 4, a through exhaust passage 26 is arranged in the round tubes of the silicon bowl 23, the lower pressing piece 24, the pressing piece 25, the lower pressing piece 24 and the pressing piece 25, so as to connect the silicon bowl 23 with the outside atmosphere, and further connect the capillary tube 3 with the outside, forming a gas passage of the capillary 3-silicon bowl 23-exhaust duct 26.

Furthermore, the glue grip 2 is provided with two protruding pieces 21 extending outwards, which is convenient for the doctor to perform the puncture operation.

The utility model discloses a use method as follows:

when the blood vessel puncture needle is normally used, a doctor holds the part 2 of the glue grip, the part, provided with the magnifier 22, of the glue grip 2 faces upwards, a small amount of blood is absorbed by the capillary tube 3 under the capillary action after the blood vessel puncture needle penetrates into the blood vessel, the part, passing through the magnifier 22 on the glue grip 2, of the blood can be found by the doctor without active withdrawal, and the use is simpler;

when repeated puncture is needed, after the puncture needle is pulled out, the pressing sheet 25 can be pressed to deform the silicon bowl 23, and in the pressing process, the air vent 26 on the pressing sheet 25 is blocked by fingers, so that the air in the silicon bowl 23 can be discharged from the capillary 3 only, and the residual blood in the capillary 3 can be discharged, and the repeated puncture can be realized;

in the case of poor blood condition and high blood viscosity, the pressing sheet 25 can be pressed down in advance before puncturing to discharge the gas in the silicon bowl 23, after the blood penetrates into the body, the vent channel 26 on the pressing sheet 25 is sealed by an adhesive tape, because the silicon bowl 23 has a tendency of recovering the original shape, the tendency is that a restoring force is reflected as a suction force, because the vent channel 26 is sealed, only gas or liquid can be sucked in through the capillary tube 3, of course, pressure cannot be applied to the pressing sheet 25 in the process, after the capillary tube 3 is contacted with the blood, the restoring force of the silicon bowl 23 can absorb the blood into the capillary tube 3, the force is greater than the force of the capillary effect, so the blood capillary tube is also suitable for the blood with high viscosity, and the rest operation is the same as the mode.

As a preferred embodiment, the cross-sectional rectangle of the inner wall of the capillary has a length of 4mm and a width of 1 mm.

In this embodiment, the magnifying glass, the capillary tube and the silicon bowl are mature prior art, and users can flexibly choose the magnifying glass, the capillary tube and the silicon bowl according to actual conditions, so detailed description is omitted.

Claims

1. A vein puncture needle for directly observing puncture conditions is characterized in that: the method comprises the following steps: needle tube, rubber holder, capillary tube; the needle tube is a thin-walled tube made of metal, one end of the needle tube is sharpened, the other end of the needle tube is fixed at the axial position of the rubber grip, the cross-sectional area of the rubber grip is larger than the cross-sectional shape of the needle tube, the rubber grip is convenient to grip, the needle tube is fixed at one end of the rubber grip, the other end of the rubber grip is connected with the blood sampling tube in the prior art, a channel with the same cross-sectional shape as the needle tube is arranged at the axial position of the rubber grip, and the;

2. A venipuncture needle for direct observation of puncture condition as claimed in claim 1 wherein: the section shape of the needle tube is not circular, and the section of the needle tube is formed by combining an arc and a plane.

3. A venipuncture needle for direct observation of puncture condition as claimed in claim 1 wherein: and a magnifying lens is further arranged at the position, close to the capillary tube, on the glue holder, and the magnifying lens is a convex lens with a thick middle part and thin two ends.

4. A venipuncture needle for direct observation of puncture condition as claimed in claim 1 wherein: still be provided with in the glue is held: press the chamber, press the chamber and be located the airtight cavity that glues and hold, press chamber bottom and capillary intercommunication, press chamber top surface and external intercommunication, press the intracavity and still include: the silicon bowl is reversely buckled and fixed at the connecting position of the capillary tube and the pressing cavity, the lower pressing sheet is fixed above the silicon bowl and detachably connected with the pressing sheet located outside through a circular tube, and a through exhaust passage is arranged in the circular tube connected among the silicon bowl, the lower pressing sheet, the pressing sheet and the pressing sheet of the lower pressing sheet and communicated with the outside atmosphere to form a gas passage such as the capillary tube-silicon bowl-exhaust passage.

5. A venipuncture needle for direct observation of puncture condition as claimed in claim 1 wherein: the glue handle is also provided with two protruding pieces which extend outwards.