Disposable human arterial blood sample collector

Abstract

The utility model discloses a disposable human arterial blood sample collector, which belongs to the technical field of arterial blood sample collectors, and comprises a tube body, a needle head assembly is detachably arranged at the end part of the tube body, the needle head assembly is sleeved on a needle head seat, a needle head cover is arranged on the needle head assembly, a cavity is arranged in the needle head cover, and the cavity is used for accommodating a needle head; the syringe further comprises a cover body, the cover body is buckled with the rear portion of the tube body and the front portion of the tube body, and a sealing boss is arranged in the middle of the cover body and used for sealing an opening in the top of the syringe needle base. And a piston is arranged in the pipe body. The utility model is used for solving the problems that the exposed needle head is easy to puncture the medical personnel and the operation of the sealing protective cap is more complicated.

Description

Technical Field

[0001] The utility model belongs to the technical field of arterial blood sample collectors, in particular to a disposable human arterial blood sample collector. Background Art

[0002] The human arterial blood sample collector commonly used in clinical practice is a sterile, disposable medical device, mainly used to collect arterial blood samples for blood gas analysis; in the early days, ordinary syringes were used to collect arterial blood samples, and the user was required to add heparin to the syringe by himself. With the development of science and technology, the arterial blood collector currently used in clinical practice is a syringe with heparin sprayed on the inner wall of the sleeve, a high-elastic piston is installed in the sleeve, and a special breathable core is installed in the piston, which can self-exhaust and self-seal when wet; for example, the patent document with publication number CN205268173U discloses a sealing protective cap for an arterial blood sample collector. After the arterial blood sample is collected, the blood collection needle is pulled out and the sealing protective cap is screwed onto the needle seat for sealing. The core rod is pushed to push the arterial blood in the cone head cavity that is not sprayed with heparin into the cavity of the sealing protective cap; the blood contacts the sealing plug, which seals itself to ensure that the blood sample no longer has the opportunity to come into contact with the air; the technical content recorded in the patent document has the following deficiencies:

[0003] 1. The needle is not wrapped with anything else after the blood is drawn and is directly exposed, which may easily cause the medical staff to be injured by the needle;

[0004] 2. The operation of the sealing cap is relatively complicated, and the piston is still connected to a core rod after the blood is drawn. If there is a collision during the transportation of the collector, the core rod may push the piston to move, squeezing the blood in the cavity, causing blood leakage, and then causing blood contamination. Utility Model Content

[0005] In response to the above problems, the present utility model provides a patent subject name to solve the problem that exposed needles can easily injure medical staff and the problem that the operation of the sealing cap is relatively complicated.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] A disposable human arterial blood sample collector comprises a tube body, a needle assembly detachably provided at the end of the tube body, the needle assembly being sleeved on a needle seat, a needle cover being provided on the needle assembly, and a cavity being provided inside the needle cover for accommodating the needle;

[0008] It also includes a cover body, which is buckled with the rear part of the tube body and the front part of the tube body. A sealing boss is provided in the middle of the cover body, and the sealing boss is used to seal the top opening of the needle seat;

[0009] A piston is arranged inside the tube body.

[0010] Compared with the prior art, the beneficial effects of the present invention are: by removing the core rod, it is possible to avoid collisions during the transportation of the collector, which may cause the core rod to push the piston to move, squeeze the blood in the cavity, and cause blood leakage. At the same time, reducing the core rod also reduces the use of materials, avoiding waste of resources; the cover body is equipped with a sealing boss, which can effectively seal the top opening of the needle seat after blood is drawn to prevent the blood sample from contacting the air; the buckle setting makes it more convenient to seal the top opening of the needle seat.

[0011] As a further improvement of the above technical solution, an exhaust hole is provided on the top of the piston, and a placement cavity is provided in the middle of the piston; the exhaust hole connects the front end of the piston with the placement cavity, the placement cavity runs through the rear end of the piston, and a sealing plug is provided in the placement cavity.

[0012] As a further improvement of the above technical solution, an outer sleeve is provided on the outside of the needle seat, an internal thread is provided on the inside of the outer sleeve, and a protrusion is provided on the bottom of the needle assembly, and the protrusion is used to clamp the needle assembly into the internal thread.

[0013] The technical purpose of the above improvement is: the outer sleeve and the internal thread are matched with the protrusion on the needle assembly to facilitate the installation and disassembly of the entire needle. At the same time, the connection between the needle and the needle seat is tighter to prevent the needle from falling off.

[0014] As a further improvement of the above technical solution, the outer diameter of the outer sleeve matches the inner diameter of the cover body, a circle of grooves is provided on the outer side wall of the outer sleeve, and a flange matching the grooves is provided on the inner side wall of the cover body.

[0015] The technical purpose of the above improvement is that the arrangement of the flange and the groove can ensure that the cover can be buckled on the coat more firmly.

[0016] As a further improvement of the above technical solution, a baffle is provided inside the cavity. The baffle is made of elastic material. One end of the baffle is connected to the side wall of the cavity, and the other end is arranged toward the cavity.

[0017] The technical purpose of the above improvement is that the setting of the blocking bar can fix the needle tube of the needle and prevent the needle tube from being exposed from the cavity.

[0018] As a further improvement of the above technical solution, the sealing boss is arranged in a conical shape, and the diameter of the middle part of the conical sealing boss is larger than the diameter of the top opening of the needle seat.

[0019] The technical purpose of the above improvement is: the conical sealing boss makes it convenient for the front end of the sealing boss to enter the top opening of the needle seat when the cover body is buckled on the outer sleeve, and the middle part of the sealing boss with a larger diameter can better seal the top opening of the needle seat.

[0020] As a further improvement of the above technical solution, a placement section is provided at the rear of the tube body, the outer diameter of the placement section is adapted to the inner diameter of the cover body, and a protrusion is provided on the placement section to match the groove, and the groove is a groove provided on the inner wall of the cover body.

[0021] As a further improvement of the above technical solution, a limiting boss is provided at the rear end of the placement cavity, and the limiting boss is used to prevent the sealing plug from falling from the placement cavity. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model.

[0023] Figure 2 This is a schematic diagram of the explosion structure of the utility model.

[0024] Figure 3 This is a schematic diagram of the three-dimensional structure of the utility model from another perspective.

[0025] Figure 4 This is a schematic diagram of a quarter-section three-dimensional structure of the utility model.

[0026] In the figure: 1. needle assembly; 2. tube body; 3. cover body; 4. piston; 5. sealing plug; 11. protrusion; 12. needle cover; 121. cavity; 122. baffle; 21. needle seat; 22. outer sleeve; 23. internal thread; 24. placement section; 31. sealing boss; 41. exhaust hole; 42. placement cavity. DETAILED DESCRIPTION

[0027] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is described in detail below in conjunction with the embodiments. The description in this section is only exemplary and explanatory and should not have any limiting effect on the scope of protection of the present invention. Example

[0028] like Figure 1-4 As shown, the disposable human arterial blood sample collector includes a tube body 2, the end of which is detachably provided with a needle assembly 1, which is sleeved on a needle seat 21. Figure 3 As shown, a needle cover 12 is provided on the needle assembly 1, wherein the bottom end of the needle cover 12 is connected to the plastic product at the lower part of the needle assembly 1 through a flexible plastic sheet, and a cavity is provided inside the needle cover 12 for accommodating the needle; Figure 3As shown, a baffle is provided inside the cavity, and the baffle is made of elastic material. One end of the baffle is connected to the side wall of the cavity, and the other end is arranged toward the cavity, wherein the baffle is arranged horizontally in the cavity, the left end of the baffle is fixed on the inner side wall of the cavity, and the right end of the baffle faces the interior of the cavity, and the distance between the right end of the baffle and the other inner side wall of the cavity is less than the diameter of the needle tube of the needle assembly 1.

[0029] like Figure 2 As shown, it also includes a cover body 3, which is snap-fitted with the rear part of the tube body 2. A placement section is provided on the rear part of the tube body 2. The outer diameter of the placement section is adapted to the inner diameter of the cover body 3. A protrusion that matches the groove is provided on the placement section. The groove is a groove provided on the inner wall of the cover body 3; on the outer sleeve 22 at the front end of the tube body 2, the outer diameter of the outer sleeve 22 matches the inner diameter of the cover body 3, a circle of grooves is provided on the outer wall of the outer sleeve 22, and a flange that matches the groove is provided on the inner wall of the cover body 3.

[0030] like Figure 2 As shown, a sealing boss 31 is provided in the middle of the cover body 3, and the sealing boss 31 is used to seal the top opening of the needle seat 21. The sealing boss 31 is conical, and the diameter of the middle part of the conical sealing boss 31 is larger than the diameter of the top opening of the needle seat 21.

[0031] An outer sleeve 22 is provided on the outside of the needle seat 21, and an internal thread 23 is provided on the inner side of the outer sleeve 22. A protrusion 11 is provided on the bottom of the needle assembly 1. The protrusions 11 are provided in pairs. When installing the needle assembly 1, the protrusion 11 and the needle assembly 1 are rotated into the outer sleeve 22 by rotating the needle assembly 1. The needle assembly 1 is fixed on the outer sleeve 22 through the internal thread 23 and the protrusion 11. The protrusion 11 is used to clamp the needle assembly 1 into the internal thread 23.

[0032] A piston 4 is provided inside the tube body 2, an exhaust hole 41 is provided on the top of the piston 4, and a placement cavity 42 is provided in the middle of the piston 4; the exhaust hole 41 connects the front end of the piston 4 with the placement cavity 42, the placement cavity 42 runs through the rear end of the piston 4, and a sealing plug 5 is provided in the placement cavity 42; a limiting boss is provided at the rear end of the placement cavity 42, and the limiting boss is used to prevent the sealing plug 5 from falling from the placement cavity 42.

[0033] The specific working principle of this utility model is as follows: Figure 2 or Figure 3As shown, during the entire collector assembly process, the piston 4 is manually pushed to move in the tube body 2. When the piston 4 reaches the preset value, the piston 4 is stopped from moving in the tube body 2. A blood drawing cavity is formed between the piston 4 and the tube body 2. The volume of the cavity is changed by changing the position of the piston 4. When drawing blood, arterial blood enters the tube body 2 from the needle and reaches the blood drawing cavity. The air in the blood drawing cavity is discharged from the exhaust hole 41 set on the top of the piston 4. When the blood in the blood drawing cavity contacts the sealing plug 5 in the piston 4, a seal is formed. The working principle of the sealing plug 5 is consistent with the principle of the piston 4 air valve set on the existing arterial blood collectors on the market, and a sealing structure will be formed when it encounters water.

[0034] After the blood drawing is completed, the needle cover 12 is placed on the needle. Due to the presence of the blocking bar, the needle is prevented from popping out of the needle cover 12.

[0035] It should be noted that, in this article, the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements that are inherent to such process, method, article or apparatus.

[0036] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention.

[0037] The above is only a preferred embodiment of the present invention. It should be pointed out that due to the limitations of textual expression, there are objectively infinite specific structures. For ordinary technicians in this technical field, without departing from the principles of the present invention, they can make several improvements, modifications or changes, and can also combine the above technical features in an appropriate manner; these improvements, modifications, changes or combinations, or the direct application of the concept and technical solution of the utility model to other occasions without improvement, should be regarded as the scope of protection of the present invention.

Claims

1. A disposable human arterial blood sample collector, characterized in that: It comprises a tube body, a needle assembly is detachably provided at the end of the tube body, the needle assembly is sleeved on the needle seat, a needle cover is provided on the needle assembly, a cavity is provided inside the needle cover, and the cavity is used to accommodate the needle; It also includes a cover body, the cover body and the rear part of the tube body are buckled together, and a sealing boss is provided in the middle of the cover body, and the sealing boss is used to seal the top opening of the needle seat; A piston is arranged inside the tube body.

2. The disposable human arterial blood sample collector according to claim 1, characterized in that: The top of the piston is provided with an exhaust hole, and the middle of the piston is provided with a placement cavity; the exhaust hole connects the front end of the piston with the placement cavity, the placement cavity runs through the rear end of the piston, and a sealing plug is provided in the placement cavity.

3. The disposable human arterial blood sample collector according to claim 1, characterized in that: An outer sleeve is provided on the outside of the needle seat, an internal thread is provided on the inside of the outer sleeve, and a protrusion is provided on the bottom of the needle assembly, and the protrusion is used to clamp the needle assembly into the internal thread.

4. The disposable human arterial blood sample collector according to claim 3, characterized in that: The outer diameter of the outer sleeve matches the inner diameter of the cover. A circle of grooves is provided on the outer side wall of the outer sleeve, and a flange matching the grooves is provided on the inner side wall of the cover.

5. The disposable human arterial blood sample collector according to claim 1, characterized in that: A baffle is provided inside the cavity. The baffle is made of elastic material. One end of the baffle is connected to the side wall of the cavity, and the other end is arranged toward the cavity.

6. The disposable human arterial blood sample collector according to claim 1, characterized in that: The sealing boss is arranged in a conical shape, and the diameter of the middle part of the sealing boss is larger than the diameter of the top opening of the needle seat.

7. The disposable human arterial blood sample collector according to claim 1, characterized in that: The rear part of the tube body is provided with a placement section, the outer diameter of the placement section is adapted to the inner diameter of the cover body, and the placement section is provided with a protrusion that matches the groove, and the groove is a groove provided on the inner wall of the cover body.

8. The disposable human arterial blood sample collector according to claim 2, characterized in that: A limiting boss is provided at the rear end of the placement cavity, and the limiting boss is used to prevent the sealing plug from falling from the placement cavity.

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