Precise sampling and collecting tube for cerebrospinal fluid examination

Abstract

The invention discloses a precision sampling and collecting tube for cerebrospinal fluid examination, a sampling and collecting tube body comprises a group of fluid chambers, a constant volume positioning block and a needle tube connecting plug used for shunting, and adjustable spaces with different volumes are formed in the group of fluid chambers through the movement of the constant volume positioning block; and the interior of each liquid containing chamber in one group is communicated with the needle tube connecting plug through a liquid guide hose. The device has the beneficial effects that the thin conduits are pushed inwards one by one according to different sample quantities required by various tests, and the constant-volume positioning block is driven to move to the position under the condition of observing the scale values of the corresponding volume scale marks, so that a plurality of adjustable spaces for liquid to be filled with different constant-value volumes can be formed; the cerebrospinal fluid sampling and collecting device has the advantages that the accuracy of the cerebrospinal fluid sampling and collecting amount is improved, the sampling and collecting efficiency is high, the accurate dosage of the cerebrospinal fluid required by various tests is ensured, and the awkward situation that low-intracranial-pressure headache and other complications are caused by excessive sampling of the cerebrospinal fluid and the test is not enough can be solved.

Description

Technical Field

[0001] The invention relates to the technical field of cerebrospinal fluid collection and testing, in particular to a precision sampling and collection tube for cerebrospinal fluid testing. Background Art

[0002] In the actual operation of cerebrospinal fluid sampling and collection for testing, too little cerebrospinal fluid is not enough for testing, and too much can cause problems such as low intracranial pressure headaches. Therefore, cerebrospinal fluid sampling and collection tubes with scales have clinical application value. However, although existing disposable sampling and collection tubes have scales, their capacity is small, so that to complete the required volume of cerebrospinal fluid, it is necessary to replace and use additional disposable sampling and collection tubes. The replacement operation is inconvenient and prone to errors. When taking for testing, multiple measurements and observations are still required. Therefore, in order to solve the above problems, a precision sampling and collection tube for cerebrospinal fluid testing is proposed. Summary of the Invention

[0003] The purpose of the present invention is to provide a precise sampling and collecting tube for cerebrospinal fluid testing in order to solve the above problems.

[0004] The present invention achieves the above-mentioned purpose through the following technical scheme: a precision sampling and collecting tube for cerebrospinal fluid testing, wherein the sampling and collecting tube body includes a group of liquid filling chambers, a fixed-volume positioning block placed inside each liquid filling chamber, and a needle and tube plug connector for diversion. The interiors of the group of liquid filling chambers are all moved by the fixed-volume positioning block to form adjustable liquid-filled spaces of different capacities. The interior of each liquid filling chamber in a group is connected to the needle and tube plug connector through a liquid guide hose. A regulating bolt is installed in each screw hole connected to the interior of the needle and tube plug connector, and a liquid separation hole is opened in the middle position of each screw hole. The outer port of the liquid separation hole is connected to the corresponding end port of the liquid guide hose.

[0005] Preferably, the annular surface of the constant volume positioning block is in sliding and sealing contact with the interior of the liquid storage chamber, and the liquid storage chamber is connected to the interior of the circular groove located at one end surface of the sampling and collecting tube body through a circular hole.

[0006] Preferably, the interior of the circular groove is communicated with the interior of each liquid-containing chamber through circular holes distributed in an annular pattern, and a thin conduit portion penetrates into the circular holes.

[0007] Preferably, one end of the thin tube is communicated with the hole in the middle of the constant volume positioning ring block, and a rubber plug is installed inside the other end of the thin tube.

[0008] Preferably, a sealing cover is sealed on the outer end port of the liquid storage chamber, and a breathable valve is connected and installed on the sealing cover, and the interior of the sealing cover is connected to the other end of the liquid guiding hose.

[0009] Preferably, the sampling collection tube body is provided with a set of volume scale lines, and one volume scale line corresponds to one liquid loading chamber.

[0010] The beneficial effects of the present application are: by pushing the thin catheter inward one by one according to the different sample amounts required by various tests to the position where the constant volume positioning block is to be moved to under the scale value of the corresponding volume scale line, a plurality of adjustable variable liquid loading spaces of different fixed values can be formed, the precision of the cerebrospinal fluid sampling collection amount is improved, the precise amount of cerebrospinal fluid required for various tests is ensured, and the dilemma of low cranial pressure headache and other complications caused by too much cerebrospinal fluid sampling and not enough for testing is solved. BRIEF DESCRIPTION OF DRAWINGS

[0011] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0012] Figure 1 is a perspective view of the overall structure of the present application; Figure 2 is another angle view of the overall structure of the present application; Figure 3 is a partial structure sectional view of the overall structure of the present application; Figure 4 is a schematic view of the connection structure between the needle tube connector and the liquid guide hose of the present application; Figure 5 is a sectional view of the needle tube connector structure of the present application.

[0013] In the figure: 1, sampling collection tube body; 110, volume scale line; 120, liquid loading chamber; 121, sealing cover; 122, air vent valve; 123, liquid guide hose; 130, circular groove; 131, circular hole; 2, needle tube connector; 210, screw hole; 210, distribution hole; 3, thin catheter; 310, rubber plug; 320, constant volume positioning block; 4, regulating screw. DETAILED DESCRIPTION

[0014] In order to make the purpose, features and advantages of the present application more obvious and easy to understand, the technical solutions in the embodiments of the present application will be described clearly and completely below in combination with the drawings of the embodiments of the present application. Obviously, the embodiments described below are only some of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application. DETAILED DESCRIPTION

[0015] The technical solution of the present invention will be further described below with reference to the accompanying drawings and through specific implementation methods.

[0016] In the description of the present invention, it should be understood that the terms "upper", "lower", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0017] See also Figure 1-5 As shown, a precision sampling and collecting tube for cerebrospinal fluid testing, the sampling and collecting tube body 1 includes a group of liquid chambers 120, a constant volume positioning block 320 placed inside each liquid chamber 120, and a needle and tube plug connector 2 for diversion. The interior of a group of liquid chambers 120 is formed by moving the constant volume positioning block 320 to form adjustable liquid spaces with different capacities. The interior of each liquid chamber 120 in a group is connected to the needle and tube plug connector 2 through a liquid guide tube 123, and a regulating bolt 4 is installed in each screw hole 210 connected to the interior of the needle and tube plug connector 2, and a liquid separation hole 211 is opened in the middle position of each screw hole 210, and the outer port of the liquid separation hole 211 is connected to the corresponding end port of the liquid guide tube 123.

[0018] The annular surface of the constant volume positioning block 320 is in sliding and sealing contact with the interior of the liquid chamber 120 , and the liquid chamber 120 is connected to the interior of the circular groove 130 located at one end surface of the sampling and collecting tube body 1 through the circular hole 131 .

[0019] The interior of the circular groove 130 is connected to the interior of each liquid filling chamber 120 through circular holes 131 distributed in an annular manner, and a thin tube 3 is inserted into the circular hole 131. One end of the thin tube 3 is connected to the channel in the middle of the constant volume positioning ring block, and a rubber plug 310 is installed inside the other end of the thin tube 3. By pushing the thin tube 3 inward, the constant volume positioning block 320 initially located at the bottom of the liquid filling chamber 120 can be moved forward, and the constant volume positioning block 320 can be initially located at the bottom of the liquid filling chamber 120 to avoid air contamination when not in use.

[0020] The outer end of the liquid-filling chamber 120 is sealed with a sealing cover 121 , and the sealing cover 121 is connected to a vent valve 122 . The interior of the sealing cover 121 is connected to the other end of the liquid-conducting hose 123 . The vent valve 122 is provided so that the liquid can flow smoothly into the liquid-filling chamber 12 .

[0021] The sampling and collecting tube body 1 is provided with a set of capacity scale lines 110 , and each capacity scale line 110 corresponds to a liquid-filling chamber 120 , so that the position to which the constant-volume positioning block 320 is to be moved can be determined by observing the scale values ​​of the capacity scale lines 110 .

[0022] The operation steps are as follows: Step 1: Open the packaging bag, take out the sampling collection tube body 1, and simultaneously connect the needle and tube connector 2 to one end of the external cerebrospinal fluid drainage tube with a needle at the end; Step 2: Based on the different sample volumes required for various tests, since the capacity of each liquid-filling chamber 120 is much larger than the sample volume required for various tests and the constant-volume positioning block 320 is initially located at the bottom of the liquid-filling chamber 120 to prevent air contamination when not in use, the thin tubes 3 are pushed inward one by one to the desired position of the constant-volume positioning block 320 when observing the corresponding volume scale line 110; Step 3: After the above operations are completed, insert the needle of the external cerebrospinal fluid drainage tube into the cerebrospinal fluid area, so that the cerebrospinal fluid enters the interior of the needle tube connector 2; Step 4: Combine Figure 5 As shown, when the cerebrospinal fluid is introduced into the selected liquid-filling chamber 120 for the first time, the regulating screw 4 is rotated outwardly so that one end of the regulating screw 4 no longer blocks the liquid separation hole 211, allowing cerebrospinal fluid to enter the liquid-filling chamber 120 through the liquid-conducting hose 123 until the liquid fills the adjusted adjustable liquid-filling space. The regulating screw 4 is then rotated inwardly again so that one end of the regulating screw 4 blocks the liquid separation hole 211, and the air-permeable valve 122 only allows gas to pass through, but prevents liquid from leaking out. Step 5: Introduce cerebrospinal fluid into the remaining liquid chambers 120 according to the operation method of step 4; Step 6: Combine Figure 2 As shown, when it is necessary to take the cerebrospinal fluid located inside each liquid chamber 120, since the cerebrospinal fluid volume value inside the thin catheter 3 is within the allowable error range, the required amount of cerebrospinal fluid can be extracted by simply piercing the rubber stopper 310 with a syringe needle.

[0023] Compared with the existing technology, the difference is that: by pushing the thin catheter 3 inward one by one according to the different sample amounts required for each test, and observing the position to which the fixed-volume positioning block 320 is to be moved under the scale value of the corresponding capacity scale line 110, a plurality of adjustable liquid spaces with different fixed volumes can be formed, thereby improving the accuracy of the cerebrospinal fluid sampling and collection amount, ensuring the accurate amount of cerebrospinal fluid required for each test, and solving the dilemma of low intracranial pressure headache and other complications caused by excessive cerebrospinal fluid sampling, and too little cerebrospinal fluid not enough for testing.

[0024] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and it is intended that all variations within the meaning and scope of the appended claims be encompassed. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0025] As described above, the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that the technical solutions described in the above embodiments can still be modified, or some of the technical features thereof can be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A precision sampling and collection tube for cerebrospinal fluid testing, characterized by: The sampling and collecting tube body (1) comprises a group of liquid chambers (120), a constant volume positioning block (320) disposed inside each liquid chamber (120), and a needle tube plug connector (2) for diversion. The inside of the group of liquid chambers (120) is formed by the movement of the constant volume positioning block (320) to form adjustable liquid spaces with different capacities. The inside of each liquid chamber (120) in a group is connected to the needle tube plug connector (2) through a liquid guide hose (123). A regulating bolt (4) is installed in each screw hole (210) connected to the inside of the needle tube plug connector (2), and a liquid separation hole (211) is opened in the middle position inside each screw hole (210). The outer port of the liquid separation hole (211) is connected to the corresponding end port of the liquid guide hose (123).

2. The precision sampling and collecting tube for cerebrospinal fluid testing according to claim 1, characterized in that: The annular surface of the constant volume positioning block (320) and the interior of the liquid storage chamber (120) are in sliding and sealing contact with each other, and the liquid storage chamber (120) is connected to the interior of the circular groove (130) located at one end surface of the sampling and collecting tube body (1) through the circular hole (131).

3. The precision sampling and collecting tube for cerebrospinal fluid testing according to claim 2, characterized in that: The interior of the circular groove (130) is communicated with the interior of each liquid-filling chamber (120) through circular holes (131) distributed in an annular pattern, and a thin conduit (3) portion penetrates the interior of the circular hole (131).

4. The precision sampling and collecting tube for cerebrospinal fluid testing according to claim 3, characterized in that: One end of the thin conduit (3) is in communication with the hole in the middle of the constant volume positioning ring block, and a rubber plug (310) is installed inside the other end of the thin conduit (3).

5. The precision sampling and collecting tube for cerebrospinal fluid testing according to claim 1, characterized in that: The outer end of the liquid-filling chamber (120) is sealed with a sealing cover (121), and a breathable valve (122) is connected and installed on the sealing cover (121). The interior of the sealing cover (121) is in communication with the other end of the liquid-conducting hose (123).

6. The precision sampling and collecting tube for cerebrospinal fluid testing according to claim 1, characterized in that: The sampling and collecting tube body (1) is provided with a group of capacity scale lines (110) distributed thereon, and each capacity scale line (110) corresponds to a liquid-filling chamber (120).

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