CN219231004U - Disposable sensitive blood return end cap - Google Patents

Abstract

The utility model discloses a disposable sensitive blood return end cap which is provided with a luer structure body, wherein the luer structure body comprises an internal thread and Lu Erzhu, a negative pressure source is arranged in Lu Erzhu, the negative pressure source comprises an axial through hole positioned in Lu Erzhu, the axial through hole is divided into two parts by a radially arranged bracket, the first part is an accommodating space positioned on the outer surface of a shell and concave inwards, a ventilation plug filling the whole accommodating space is arranged in the accommodating space, an extension arm extending axially from the bracket is arranged in the second part, and an elastic capsule is sleeved on the extension arm. The beneficial effects of the utility model are mainly as follows: the end cap with the negative pressure source can be matched and applied to a venous indwelling needle, an infusion apparatus and a venous transfusion needle, and after the infusion apparatus punctures into a blood vessel, negative pressure is formed in the puncture needle tube, so that blood quickly flows back, and the problems of insufficient blood pressure and slow blood return of patients are solved; the structure is effective, and the sensitivity is high.

Description

Disposable sensitive blood return end cap

Technical Field

The utility model relates to the technical field of medical equipment, in particular to a disposable sensitive blood return end cap.

Background

Currently, intravenous indwelling needles, infusion sets and intravenous infusion needles are very commonly used in the medical field. When a medical staff punctures a vein of a patient, it is necessary to judge whether a needle tube of an infusion set has penetrated the vein of the patient by observing whether there is a return blood. When the medical staff performs puncture, the pressure in the needle cavity is unchanged, so that the problem that blood return is not easy to observe exists. This is because the blood flow pressure in the veins is too low to result in blood withdrawal difficulties. In some special cases, the venous return speed of the patient is also slow, for example, the venous return is slow due to the fact that the subcutaneous fat of some patients is too thick, and sometimes, when the patients use medicines for controlling the blood pressure or are in special cases such as massive hemorrhage, the venous blood pressure of the patients is also low, so that the venous return is slow. Especially for patients with insufficient systemic circulation blood volume and hypoalbuminemia edema, due to insufficient circulation blood volume and poor nutrition, blood vessels of the patients collapse and are not full, blood return is not easily observed when venous blood vessels are punctured, and the puncture success rate is affected.

At present, under the condition of poor blood return effect, a vacuum negative pressure blood drawing tube is generally used for drawing blood, so that the phenomenon can be completely eradicated. Chinese patent CN2614686, CN205683350 and CN207614133 also disclose several venous indwelling needles sensitive to blood return, however, the schemes are improved from the structure of the needle tube, and the problems of complex overall structure are brought while solving the problems.

Disclosure of Invention

The utility model aims to overcome the defects in the prior art and provides a disposable sensitive blood return end cap.

The aim of the utility model is achieved by the following technical scheme:

the disposable sensitive blood return end cap comprises a luer structure body, an outer shell, an internal thread and a Lu Erzhu, wherein the internal thread is arranged on the inner wall of the outer shell, lu Erzhu is arranged on the central axis of the outer shell and partially extends out of the outer shell, a negative pressure source is arranged in Lu Erzhu and comprises an axial through hole positioned in Lu Erzhu, the axial through hole is divided into two parts by a radially arranged bracket, a containing space is arranged on the inner surface of the outer shell in a concave mode, a ventilation plug is arranged in the containing space and fills the whole containing space, an extension arm axially extending from the bracket is arranged in the second part, and an elastic capsule is sleeved on the extension arm.

Preferably, the extension arm is two pieces of symmetry setting, and relative setting and two have the clearance between the piece, elasticity capsule cladding is in the extension arm outside and closure the clearance.

Preferably, the extension top end of the extension arm is provided with a closing cap.

Preferably, the cross section of the extension arm is the same as the shape of the portion of the bracket.

Preferably, the bracket is of a cross-shaped structure and comprises at least one through hole, and the through hole is communicated with a gap between the two extension arms.

Preferably, the cross section of the extension arm is the same as the portion of the inner circular profile of the bracket.

Preferably, the elastic capsule has at least one deformation.

Preferably, the elastic capsule has a fixing portion located at both sides of the deformation portion.

Preferably, the outer side of the shell is provided with friction increasing teeth.

Preferably, the disposable sensitive blood return end cap is applied to an intravenous needle, an infusion apparatus and an intravenous infusion needle, and is in threaded connection with the disposable sensitive blood return end cap.

The beneficial effects of the utility model are mainly as follows: the end cap with the negative pressure source can be matched and applied to a venous indwelling needle, an infusion apparatus and a venous transfusion needle, and after the infusion apparatus punctures into a blood vessel, negative pressure is formed in the puncture needle tube, so that blood quickly flows back, and the problems of insufficient blood pressure and slow blood return of patients are solved; the structure is effective, and the sensitivity is high.

Drawings

The technical scheme of the utility model is further described below with reference to the accompanying drawings:

fig. 1: a schematic perspective view of a preferred embodiment of the present utility model;

fig. 2: a cross-sectional view of a preferred embodiment of the present utility model;

fig. 3: an exploded view of a preferred embodiment of the present utility model;

fig. 4: schematic of the luer structure body of the preferred embodiment of the present utility model;

fig. 5: a top view of the luer structure body of the preferred embodiment of the present utility model;

fig. 6: a schematic perspective view of a second embodiment of the present utility model;

fig. 7: a cross-sectional view of a second embodiment of the present utility model;

fig. 8: a schematic perspective view of an elastic capsule according to a second embodiment of the present utility model;

fig. 9: schematic application of the utility model.

Detailed Description

The present utility model will be described in detail below with reference to specific embodiments shown in the drawings. The embodiments are not limited to the present utility model, and structural, methodological, or functional modifications of the utility model from those skilled in the art are included within the scope of the utility model.

In the description of the embodiments, it should be noted that the positional or positional relationship indicated by the terms such as "center", "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "inner", "outer", etc. are based on the positional or positional relationship shown in the drawings, are merely for convenience of description and simplification of description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in the specific orientation, and thus are not to be construed as limiting the present utility model. Furthermore, the terms "first," "second," "third," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; in the description of the scheme, the direction approaching the operator is the near end, and the direction separating from the operator is the far end, with reference to the operator.

The preferred embodiment of the disposable sensitive blood back cap 100 of the present disclosure, as shown in fig. 1-5, has a luer structure body, specifically: comprising a housing 1 and internal threads 2 and Lu Erzhu built-in. The same as the existing common end face is that the outer side of the shell 1 is provided with friction increasing teeth 10. The internal thread 2 is located on the inner wall of the housing 1, and the Lu Erzhu 3 is located on the central axis of the housing 1 and partially protrudes from the housing 1.

The utility model is characterized in that: a negative pressure source is arranged in the Lu Erzhu, the negative pressure source comprises an axial through hole positioned in the Lu Erzhu, and the axial through hole is divided into two parts by a radially arranged bracket 4. As shown in connection with fig. 5, the bracket 4 has a cross-shaped structure and includes at least one through hole 40. Of course, other configurations are possible.

As shown in fig. 2 and 3, the first portion of the bracket 4 is a concave accommodation space located on the outer surface of the housing 1, and a ventilation plug 5 filling the whole accommodation space is disposed in the first portion.

The second part has an extension arm 6 extending axially from the support 4, and a resilient capsule 7 is fitted over the extension arm 6. Specifically, in the preferred embodiment, the extension arm 6 is two symmetrically disposed plates, and the two plates are disposed opposite to each other with a gap 60 therebetween. The cross section of the extension arm 6 is the same as, i.e. extends from, the portion of the inner circular profile of the support 4. The through hole 40 communicates with a gap 60 between the two extension arms 6.

As shown in connection with fig. 2 and 3, the elastic capsule 7 has a fixing portion 71 and at least one deformation portion 70. The fixing portions 71 are located on both sides of the deformation portion 70. The elastic capsule 7 is sleeved on the outer side of the extension arm 6, the elastic capsule and the extension arm are fixed through the fixing part 71, and the deformation part 70 is made of easily deformable plastic materials slightly protruding outwards in an initial state. The preferred embodiment is spherical, although other shapes are possible.

The key points are as follows: the function of the extension arm 6 in the utility model is to allow the deformation part 70 of the elastic capsule 7 to deform inwards under the venous squeezing pressure to form negative pressure, and the inner cavity gas is easily discharged through the vent plug 5 while squeezing deformation, so that the blood is sucked under the condition, and sensitive blood return can be formed. And if blood flows to the ventilation plug 5, the blood and the ventilation plug form a sealing effect, and the ventilation plug is ventilated and impermeable to blood. Therefore, the elastic capsule can form a sensitive blood return effect even if the elastic capsule has a little venous pressure.

The second embodiment of the disposable sensitive blood back cap of the present disclosure, as shown in fig. 6-8, has a luer structure body, as in the preferred embodiment, specifically: comprising a housing 1 and internal threads 2 and Lu Erzhu built-in. A negative pressure source is arranged in the Lu Erzhu. The negative pressure source comprises an axial through hole positioned in the Lu Erzhu 3, a bracket 4, a ventilation plug 5, an extension arm 6 and an elastic capsule 7 sleeved on the extension arm 6, wherein the bracket 4, the ventilation plug 5 and the extension arm 6 are positioned in the axial through hole. The symmetrical extension arms 6 are provided with gaps 60, and the elastic capsules 7 are sleeved on the extension arms 6 and close the gaps 60. The extension arm 6 of the present second embodiment is of the same arcuate configuration as the preferred embodiment, although other configurations are possible as will be appreciated by those skilled in the art.

Unlike the preferred embodiment, the extension arm 6 has a closing cap 61 at its extension top end, and when the elastic capsule 7 is fitted around the outer circumference of the extension arm 6 and closes the gap 60, a closed cavity is formed by the elastic capsule and the closing cap 61. Compared with the preferred embodiment, the embodiment has better blood return effect because of the closed cavity. Because the top opening of the first embodiment loses part of the venous pressure. Therefore, in order to achieve the same effect, in the third embodiment of the present utility model, the closing cover 61 may be a part of the elastic capsule 7, that is, may be used as the end cap of the elastic capsule 7, and the extension arm 6 may be configured as the preferred embodiment.

Likewise, the elastic capsule 7 has a deformation portion 70. The shape of the deformation portion 70 is not particularly limited, and for example, the deformation portions of the preferred embodiment and the second embodiment are different, and the main purpose thereof is to deform under pressure. In order to achieve the object, the following schemes can be adopted: the thickness of the deformation portion 70 is thinner than the thickness of the other portions of the elastic capsule 7, or the material of the deformation portion 70 is more elastic than the material of the other portions of the elastic capsule 7, and is more easily deformed by compression, etc.

Referring to fig. 9, the disposable sensitive blood return cap 100 is applied to an intravenous needle 200, an infusion set, and an intravenous needle, and the disposable sensitive blood return cap 100 is screw-coupled thereto. The connection between the disposable sensitive blood return cap 100 and the venous indwelling needle 200 is the same as that of the other infuser, and will not be described here.

The utility model provides an end cap with a negative pressure source, which can be matched and applied to a venous indwelling needle, an infusion apparatus and a venous transfusion needle, and after the infusion apparatus punctures into a blood vessel, negative pressure is formed in a puncture needle tube, so that blood quickly flows back, and the problems of insufficient blood pressure and slow blood return of patients are solved; the structure is effective, and the sensitivity is high.

It should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is for clarity only, and that the skilled artisan should recognize that the embodiments may be combined as appropriate to form other embodiments that will be understood by those skilled in the art.

The above list of detailed descriptions is only specific to practical embodiments of the present utility model, and they are not intended to limit the scope of the present utility model, and all equivalent embodiments or modifications that do not depart from the spirit of the present utility model should be included in the scope of the present utility model.

Claims (10)

1. Disposable sensitive back blood end cap, has luer structure body, and it includes shell (1), and built-in internal screw thread (2) and Lu Erzhu (3), internal screw thread (2) are located on the inner wall of shell (1), lu Erzhu (3) are located on the axis of shell (1) and partly stretch out in shell (1), its characterized in that: the novel multifunctional portable vacuum pump is characterized in that a negative pressure source is arranged in the Lu Erzhu (3), the negative pressure source comprises an axial penetrating through hole located in the Lu Erzhu (3), the axial penetrating through hole is divided into two parts by a support (4) arranged radially, the first part is an accommodating space which is located in the inner concave mode of the outer surface of the housing (1), an air permeable plug (5) which fills the accommodating space is arranged in the accommodating space, an extension arm (6) extending axially from the support (4) is arranged in the second part, and an elastic capsule (7) is sleeved on the extension arm (6).

2. The disposable sensitive blood return end cap of claim 1, wherein: the extension arm (6) is two symmetrically arranged, a gap (60) is formed between the two symmetrically arranged extension arms, and the elastic capsule (7) is coated on the outer side of the extension arm (6) and seals the gap (60).

3. The disposable sensitive blood return end cap of claim 2, wherein: the extension top end of the extension arm (6) is provided with a closing cover (61).

4. A disposable sensitive blood return end cap according to claim 2 or 3, wherein: the cross section of the extension arm (6) is the same as the partial shape of the bracket (4).

5. A disposable sensitive blood return end cap according to claim 2 or 3, wherein: the bracket (4) is of a cross-shaped structure and comprises at least one through hole (40), and the through hole (40) is communicated with a gap between two extension arms (6).

6. A disposable sensitive blood return end cap according to claim 2 or 3, wherein: the cross section of the extension arm (6) is the same as the part of the inner circular contour of the bracket (4).

7. A disposable sensitive blood return end cap according to claim 2 or 3, wherein: the elastic capsule (7) has at least one deformation (70).

8. The disposable sensitive blood return end cap of claim 7, wherein: the elastic capsule (7) has a fixing portion (71) located on both sides of the deformation portion (70).

9. The disposable sensitive blood return end cap of claim 1, wherein: the outer side of the shell (1) is provided with friction increasing teeth (10).

10. The disposable sensitive blood return end cap of claim 1, wherein: the disposable sensitive blood return end cap (100) is applied to an intravenous needle (200), an infusion apparatus and an intravenous needle, and is in threaded connection with the disposable sensitive blood return end cap.

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