A sealed cap for a blood lancet

Abstract

This utility model discloses a sealing cap for blood collection needles, comprising an upper shell, a lower shell, and a sealing element. The upper shell has an upper through hole for connecting to a testing device; the lower shell has a lower through hole for connecting to a blood collection needle. The upper shell and the lower shell are fixedly connected and enclose a mounting cavity, with the upper and lower through holes respectively communicating with the mounting cavity. The sealing element is fixedly disposed within the mounting cavity to separate the upper and lower through holes. Compared with the prior art, the sealing cap for blood collection needles provided by this utility model, comprising an upper shell, a lower shell, and a sealing element, wherein the lower shell can be fitted onto the syringe of the blood collection needle to seal the syringe interface, preventing internal blood oxidation and improving the accuracy of blood sample analysis results.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, specifically to a sealing cap for blood collection needles. Background Technology

[0002] In hospitals or testing laboratories, blood gas analysis is performed for rapid diagnosis of patients. This requires measuring key indicators such as pH, partial pressure of carbon dioxide, and partial pressure of oxygen in the blood within a short timeframe, demanding extremely high precision. In practice, venous or capillary blood is typically drawn using a lancet and then sent to a specialized blood gas analyzer. During this transfer, if the lancet is left unattended for an extended period, the blood sample may come into contact with air through the needle hole. This can cause oxygen from the air to dissolve into the blood sample, affecting the accuracy of the analysis results. Therefore, the lancet needs to be sealed with a cap. Utility Model Content

[0003] The purpose of this invention is to overcome the above-mentioned technical deficiencies and propose a sealing cap for blood collection needles, thereby solving the technical problem that the blood inside the blood collection needles will be oxidized in the prior art.

[0004] To achieve the above-mentioned technical objectives, the present invention adopts the following technical solution: This utility model provides a sealing cap for blood collection needles, comprising: an upper shell, a lower shell, and a sealing element. The upper shell has an upper through hole for connecting the testing equipment; The lower shell has a lower through hole for connecting a blood collection needle. The upper shell is fixedly connected to the lower shell and together form a mounting cavity. The upper through hole and the lower through hole are respectively connected to the mounting cavity. The sealing element is fixedly installed inside the mounting cavity to separate the upper through hole and the lower through hole.

[0005] In some embodiments, the seal includes an edge portion located at the edge of the seal and a middle portion located in the middle of the seal, the middle portion being integrally connected to the edge portion, the thickness of the middle portion being less than that of the edge portion, and the upper and lower surfaces of the edge portion being sealed and fixedly connected to the upper and lower shells, respectively.

[0006] In some embodiments, the intermediate portion has a slit extending through its upper and lower surfaces, and the intermediate portion is elastic to close the slit.

[0007] In some embodiments, the lower shell is formed with a lower annular rib facing the middle portion, the lower annular rib being arranged around the slit, and the lower surface of the middle portion abutting against the lower annular rib.

[0008] In some embodiments, the upper shell is formed with an upper annular rib facing the middle portion, the upper annular rib being arranged around the slit, and the upper surface of the middle portion being spaced apart from the upper annular rib.

[0009] In some embodiments, at least two fixing ears are formed on the outer wall of the lower shell, and the fixing ears can be screwed into the threads of the blood collection needle.

[0010] In some embodiments, the inner wall of the upper shell is formed with a plurality of upper vertical ribs, which are arranged along the axial direction of the upper shell.

[0011] In some embodiments, the upper through hole is a flared hole, and its inner diameter gradually increases in the direction away from the lower shell.

[0012] In some embodiments, the lower through hole is a trumpet hole, the inner diameter of which gradually increases in the direction away from the upper shell to accommodate a universal blood collection needle.

[0013] In some embodiments, the upper shell and the lower shell are connected by ultrasonic welding.

[0014] Compared with the prior art, the sealing cap for blood collection needles provided by this utility model includes an upper shell, a lower shell, and a sealing element. The lower shell can be fitted onto the syringe of the blood collection needle to seal the syringe connector, prevent internal blood oxidation, and improve the accuracy of blood sample result analysis. Attached Figure Description

[0015] Figure 1 This is an exploded view of the sealing cap for a blood collection needle provided in an embodiment of this utility model; Figure 2 This is a schematic diagram of the structure of the sealing cap for blood collection needles in use, provided in this embodiment of the utility model; Figure 3 yes Figure 2 A partial sectional view. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0017] To address the technical problem of blood oxidation inside blood collection needles, this invention provides a sealing cap for blood collection needles that can seal the syringe interface and prevent the internal blood from being oxidized.

[0018] Please see Figures 1 to 3 , Figure 1 This is an exploded view of the sealing cap for a blood collection needle provided in an embodiment of this utility model; Figure 2This is a schematic diagram of the structure of the sealing cap for blood collection needles in use, provided in this embodiment of the utility model; Figure 3 yes Figure 2 A partial sectional view.

[0019] The sealing cap for blood collection needles includes an upper shell 1, a lower shell 2, and a sealing element 3.

[0020] The upper shell 1 has an upper through hole 11 for connecting the testing equipment. The shape and size of the upper through hole 11 are adapted to the interface of the testing equipment, and the upper shell 1 can be directly connected to the interface.

[0021] The lower shell 2 has a lower through hole 21 for connecting a blood collection needle. The shape and size of the lower through hole 21 are adapted to the connector of the universal syringe 4 after the blood collection needle has been removed, and it can be directly connected to the connector of the syringe 4. The upper shell 1 and the lower shell 2 are fixedly connected and enclose a mounting cavity. The upper through hole 11 and the lower through hole 21 are respectively connected to the mounting cavity.

[0022] The sealing element 3 is fixedly installed in the mounting cavity to separate the upper through hole 11 and the lower through hole 21, thereby achieving a sealing effect.

[0023] In some embodiments, the upper through hole 11 is a flared hole, and its inner diameter gradually increases in the direction away from the lower shell 2.

[0024] In some embodiments, the inner wall of the upper shell 1 is provided with a plurality of upper vertical ribs 12, which are arranged along the axial direction of the upper shell 1 for better interface connection with the testing equipment.

[0025] In some embodiments, the lower through hole 21 is a flared hole, the inner diameter of which gradually increases in the direction away from the upper shell 1, to accommodate the syringe 4 connector of a universal blood collection needle.

[0026] In some embodiments, at least two retaining ears 22 are also formed on the outer wall of the lower shell 2. The retaining ears 22 can be screwed into the threads of the syringe 4 connector of the blood collection needle. This makes the connection between the syringe 4 and the sealing cap tighter and more reliable, and prevents it from easily coming loose.

[0027] The upper through hole 11 and the lower through hole 21 are preferably arranged coaxially.

[0028] In some embodiments, the upper shell 1 and the lower shell 2 are connected by ultrasonic welding.

[0029] In some embodiments, the seal 3 includes an edge portion 31 located at the edge of the seal and a middle portion 32 located in the middle of the seal, the middle portion 32 being integrally connected to the edge portion 31. Furthermore, the thickness of the middle portion 32 is less than that of the edge portion 31, and the upper and lower surfaces of the edge portion 31 are respectively sealed and fixedly connected to the upper shell 1 and the lower shell 2.

[0030] In some embodiments, the intermediate portion 32 has a slit 33 extending through its upper and lower surfaces, and the intermediate portion 32 is elastic to close the slit 33. The slit 33 allows the detection device to collect blood during detection, and has a self-sealing effect when not in a detection state. The sealing element 3 can be made of silicone to provide good elasticity and sealing performance.

[0031] In some embodiments, the lower shell 2 is formed with a lower annular rib 23 facing the middle portion 32. The lower annular rib 23 is arranged around the slit 33, and the lower surface of the middle portion 32 abuts against the lower annular rib 23.

[0032] Correspondingly, the upper shell 1 is formed with an upper annular rib 13 facing the middle part 32. The upper annular rib 13 is arranged around the slit 33, and the upper surface of the middle part 32 is spaced apart from the upper annular rib 13.

[0033] After the blood sample is drawn by syringe 4 and the sealing cap is installed, the front connector of the commonly used syringe 4 is inserted into the lower through hole 21 to form a tight fit. Some models of syringes have internal threads for fixing, and the fixing lug 22 on the lower shell 2 can be turned into the threads to make the connection between syringe 4 and sealing cap more secure and reliable, and not easy to loosen.

[0034] After the syringe 4 completes blood collection and the sealing cap is installed, the upper shell 1 and lower shell 2 are ultrasonically welded together, and the slit 33 of the sealing element 3 fits tightly, which can isolate the air inside the syringe from the outside. At the same time, the blood will not leak or seep out.

[0035] During this period, the operator may make a mistake. When the piston of the syringe 4 is pulled, the lower annular rib 23 and the middle part 32 are tightly fitted, and the periphery of the slit 33 cannot deform, so the slit 33 cannot be opened to form a passage, thus achieving a seal and preventing air from being drawn in. In another scenario, if too much air gets into the blood sample inside the lancet, the operator needs to manually expel the air. This can be done by pushing the syringe 4. Because the upper annular rib 13 and the middle part 32 are in a clearance fit, the seal 3, under the pressure of the airflow inside the syringe 4, deforms near the slit 33, creating an open circuit, allowing the gas to escape. As mentioned above, this sealing cap also functions as a one-way valve.

[0036] The specific embodiments of this utility model described above do not constitute a limitation on the scope of protection of this utility model. Any other corresponding changes and modifications made based on the technical concept of this utility model should be included within the scope of protection of the claims of this utility model.

Claims

1. A sealing cap for a blood collection needle, characterized in that, include: Upper housing, the upper housing having an upper through hole for connecting the detection equipment; The lower shell has a lower through hole for connecting a blood collection needle. The upper shell is fixedly connected to the lower shell and together forms a mounting cavity. The upper through hole and the lower through hole are respectively connected to the mounting cavity. A sealing element is fixedly disposed within the mounting cavity to separate the upper through hole and the lower through hole.

2. The sealing cap for a blood collection needle according to claim 1, characterized in that, The sealing element includes an edge portion located at the edge of the sealing element and a middle portion located in the middle of the sealing element. The middle portion is integrally connected to the edge portion. The thickness of the middle portion is less than that of the edge portion. The upper surface and lower surface of the edge portion are respectively sealed and fixedly connected to the upper shell and the lower shell.

3. The sealing cap for a blood collection needle according to claim 2, characterized in that, The middle portion has a slit that runs through its upper and lower surfaces, and the middle portion is elastic to close the slit.

4. The sealing cap for a blood collection needle according to claim 3, characterized in that, The lower shell has a lower annular rib facing the middle portion, the lower annular rib is arranged around the slit, and the lower surface of the middle portion abuts against the lower annular rib.

5. The sealing cap for a blood collection needle according to claim 4, characterized in that, The upper shell is formed with an upper annular rib facing the middle portion, the upper annular rib is arranged around the slit, and the upper surface of the middle portion is spaced apart from the upper annular rib.

6. The sealing cap for a blood collection needle according to claim 1, characterized in that, At least two fixing ears are also formed on the outer wall of the lower shell, which can be screwed into the threads of the blood collection needle.

7. The sealing cap for a blood collection needle according to claim 1, characterized in that, The inner wall of the upper shell is formed with a plurality of upper vertical ribs, which are arranged along the axial direction of the upper shell.

8. The sealing cap for a blood collection needle according to claim 1, characterized in that, The upper through hole is a trumpet hole, and its inner diameter gradually increases in the direction away from the lower shell.

9. The sealing cap for a blood collection needle according to claim 1, characterized in that, The lower through hole is a trumpet-shaped hole, with its inner diameter gradually increasing in the direction away from the upper shell to accommodate a universal blood collection needle.

10. The sealing cap for a blood collection needle according to claim 1, characterized in that, The upper shell and the lower shell are connected by ultrasonic welding.

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