CN206275704U - A kind of collection system that cerebrospinal fluid is collected for lumbar puncture - Google Patents

Abstract

The utility model discloses a collection system for lumbar puncture to collect cerebrospinal fluid, which comprises a puncture needle used for lumbar puncture, the tail of the puncture needle communicates with a drainage tube, and the other end of the drainage tube leads to a test tube. The tube cover of the test tube, the test tubes are arranged in several groups through a rectangular array on the test tube rack, and the liquid outlet of the drainage tube directly leads to the test tube. The test tube is arranged on the test tube rack, and the length advantage of the drainage tube can be used to quickly switch the liquid outlet of the drainage tube between the test tubes and easily collect multiple groups of specimens. This utility model is used in the field of medical instruments.

Description

A collection system for lumbar puncture to collect cerebrospinal fluid

technical field

The utility model relates to the field of medical instruments, in particular to a collection system for lumbar puncture to collect cerebrospinal fluid.

Background technique

Lumbar puncture is one of the commonly used clinical examination methods in neurology. It is often used to check the properties of cerebrospinal fluid. It is of great significance for the diagnosis of neurological diseases such as intracranial infection, cerebrovascular disease, and brain tumors. It is also used for intrathecal injection of drugs. Clinically, after a successful lumbar puncture, there are still several common problems that need to be solved urgently:

The doctor’s method is to ensure that the puncture needle is parallel to the bed surface after the lumbar puncture is successful, and the cerebrospinal fluid flows out from the tail of the puncture needle and drips vertically. Reduce the distance between the cerebrospinal fluid and the air, and prevent the cerebrospinal fluid from dripping out of the test tube; if the patient fails to keep the back vertical to the bed surface, the puncture needle cannot be parallel to the bed surface, and the tail of the puncture needle becomes higher than the puncture point , the cerebrospinal fluid flows out from the tail of the needle and accumulates at the tail of the puncture needle. At this time, the location of the cerebrospinal fluid drop cannot be accurately judged; if the patient is constantly twisting due to confusion and restlessness, it is even more difficult for the doctor to adjust the position of the test tube and collect the cerebrospinal fluid in time. The cerebrospinal fluid is difficult to drip into the test tube and drips on the sterile drape, which not only causes the waste of cerebrospinal fluid, but also causes the splash of cerebrospinal fluid to increase the possibility of body fluid contamination.

At the same time, the cerebrospinal fluid drips down a few centimeters in the air and is put into the test tube. The cerebrospinal fluid is easily contaminated by pathogens in the air after it comes into contact with the air during the dripping process. A certain kind of bacteria, the doctor comprehensively judges that the specimen is contaminated, that is, the specimen is no longer referenced.

Generally, before collecting the cerebrospinal fluid, the doctor will first measure the pressure of the cerebrospinal fluid. In the past, the process of measuring the pressure of the cerebrospinal fluid was to connect three glass thin tubes from end to end. Each tube is 20 cm long, and the total length is 60 cm. Take the scale, when the joints of the three glass tubes are not tightly connected, the cerebrospinal fluid leaks, thereby misleading the doctor to judge that the pressure of the cerebrospinal fluid is too low. Moreover, when the doctor took, connected, and removed the three glass tubes, the glass tubes occasionally collided with each other, fell to the ground, and broke into several pieces, which not only increased the potential risk of medical staff being injured by sharp equipment, but also caused the risk of cerebrospinal fluid splashing. Body fluid contamination.

When the disease requires the collection of multiple sets of cerebrospinal fluid samples, doctors repeatedly take empty test tubes, remove cotton balls, receive cerebrospinal fluid, and place test tubes into test tube racks. Operation errors are prone to occur, causing test tubes to tilt, and cerebrospinal fluid is absorbed by cotton balls, which reduces The sample size also affects the test results. When collecting cerebrospinal fluid, the doctor separates his lower limbs, clings to the edge of the bed, leans his upper body forward, and hangs his arms in the air. If the doctor’s body is fixed for too long, it is easy to experience low back pain, sore arms, and even trembling hands. The operation of the needle core is suspended, a short rest, and then continue to collect cerebrospinal fluid, and sometimes endure the pain and continue to work.

Utility model content

The purpose of the utility model is to provide a collection system for lumbar puncture to collect cerebrospinal fluid, which can reduce the labor intensity of doctors and improve the collection efficiency and quality of cerebrospinal fluid.

The technical scheme that the utility model takes is:

A collection system for lumbar puncture to collect cerebrospinal fluid, comprising a puncture needle for lumbar puncture, the tail of the puncture needle communicates with a drainage tube, the other end of the drainage tube leads to a test tube, and the drainage tube is also provided with a cap for covering the test tube, Several groups of test tubes are arranged on the test tube rack in a rectangular array.

As a further improvement of the technical solution of the utility model, the drainage tube is provided with a spring clip for controlling the conduction or closure of the drainage tube.

As a further improvement of the technical solution of the utility model, the tube cap is a round platform, and the small end of the round platform can be inserted into the bottle mouth of the test tube.

As a further improvement of the technical solution of the utility model, the diameter of the tube cover is larger than the caliber of the test tube and can cover the caliber of the test tube, and the edge of the tube cover has a baffle with an opening facing the test tube.

As a further improvement of the technical solution of the utility model, a round hole is provided in the center of the cap to facilitate the passage of the drainage tube.

As a further improvement of the technical solution of the utility model, the tube cover and the drainage tube are fixed to form a whole.

As a further improvement of the technical solution of the utility model, the drainage tube is marked with a size scale.

As a further improvement of the technical solution of the utility model, the test tube rack includes a bottom plate and a top plate, the top plate has round holes for positioning the test tubes, and a measuring plate for measuring the liquid level in the test tubes is arranged between the bottom plate and the top plate.

As a further improvement of the technical solution of the utility model, the measuring plate has round holes for test tubes to pass through, and the measuring plate can be adjusted up and down by adjusting bolts arranged on the test tube rack.

Beneficial effects of the utility model: the collection system for lumbar puncture to collect cerebrospinal fluid is provided with a drainage tube between the puncture needle and the test tube, which facilitates the direct flow of cerebrospinal fluid to the test tube. It is labor-intensive; several groups of test tubes are arranged on the test tube rack, and the advantage of the length of the drainage tube can be used to quickly switch the liquid outlet of the drainage tube among the test tubes, and it is easy to collect multiple groups of specimens.

Description of drawings

Below in conjunction with accompanying drawing, the utility model is further described:

Fig. 1 is the overall structure diagram of the utility model embodiment.

detailed description

Referring to Figure 1, the utility model is a collection system for lumbar puncture to collect cerebrospinal fluid, including a puncture needle 1 for lumbar puncture, and a drainage tube 2 communicated with the puncture needle 1 through a transition fit, specifically, the tail of the puncture needle 1 is first The cylindrical hole expands outwards to become a conical hole. The head of the drainage tube 2 is a cylindrical shaft and then a cone shape. The cylindrical shaft of the drainage tube 2 is inserted into the tail of the puncture needle 1 to form a transition fit. Error, so that the drainage tube 2 and the puncture needle 1 fit closely to prevent liquid leakage. Drainage tube 2 adopts PVC material. For details, refer to the cooperation between needles and needle tubes commonly used in hospitals in daily life, and details will not be repeated here.

The drainage tube 2 is provided with a spring clip 3 for controlling the conduction or closure of the drainage tube 2. The spring clip 3 is a scissor structure. The spring clip 3 includes two short rods hinged together. The spring makes the two short bars of the spring clip 3 merge naturally to generate clamping force. The clamping surfaces of the two short rods are polished to a flat surface, and when the drainage tube 2 is clamped, the clamping surfaces can squeeze the drainage tube 2 with the largest area to achieve a good current limiting effect. When the spring clip 3 is not in use, the spring clip 3 can be tied to the drainage tube 2 by winding a string, or the spring clip 3 can be separated and placed in other places.

The puncture needle 1 penetrates into the subarachnoid space. Under the pressure of the cerebrospinal fluid, the cerebrospinal fluid will flow out naturally. Connect the drainage tube 2 to the puncture needle 1 to collect the cerebrospinal fluid. The liquid will not be scattered and wasted or dripped on the sterile drape, and there will be no body fluid pollution; the liquid outlet of the drainage tube 2 is placed in the test tube 5, which can reduce the contact between the cerebrospinal fluid and the air, and avoid the collected cerebrospinal fluid from being polluted. Improve the quality of the collected CSF. For the doctor, this design frees the hands of the doctor, and no longer requires the doctor to keep the lower limbs apart, close to the edge of the bed, lean the upper body forward, and hang the arms in the air. The doctor can complete the collection work by adjusting the drainage tube 2 occasionally, reducing the Reduced the labor intensity of doctors.

As a preferred embodiment of the present invention, in order to reduce the contact between cerebrospinal fluid and air, the drainage tube 2 is also provided with a cap 4 for covering the test tube 5 . Its structure is that the drainage tube 2 passes through the center of the tube cover 4 . Pipe cover 4 adopts PVC material, has the following two embodiments:

One is to make the tube cover 4 into a circular sheet, the diameter of which is larger than the diameter of the bottle mouth of the test tube 5, and the edge of the sheet is bent to form a baffle, and the center of the tube cover 4 that needs to be passed by the drainage tube 2 is a cross channel . The sheet-like PVC material is elastic. After making a cross-through groove in the center, a four-petal swingable protrusion is formed in the center. After the drainage tube 2 is passed through the tube cover 4, the four-petal protrusion will naturally move towards the drainage tube 2. The insertion direction is convex. After the four-petal protrusion is combined with the drainage tube 2, the four-petal protrusion is stretched and fits the tube wall of the drainage tube 2, forming an effective frictional contact surface with the drainage tube 2, that is, the drainage tube 2 is easy to pass through the tube cover 4. Difficult to extract. The cross channel can effectively prevent the drainage tube 2 from falling off automatically and improve the safety of the collection process. Simultaneously, the edge of the sheet also bends a baffle with an opening facing the test tube 5, and the baffle can completely cover the bottleneck of the test tube 5; if it is not necessary to bend the baffle at the edge of the sheet, the diameter of the sheet can also be slightly increased big.

The second is to make the tube cap 4 into a round table with a suitable thickness, the slope of the round table is 5°～15°, the thickness is about 1cm, and the maximum diameter of the bottom surface of the round table is slightly larger than the diameter of the bottle mouth of the test tube 5, so that most of the tube cover 4 can be embedded. The bottle mouth of test tube 5 and the center of tube cap 4 are circular through holes, which form a slight transition fit between the circular through hole and drainage tube 2, both to facilitate manual insertion and extraction of drainage tube 2, and to prevent The drainage tube 2 falls off naturally. The cap 4 in this embodiment is also made of PVC. The tube cover 4 of the circular platform structure has a more firm fixing effect, and the doctor only needs to place the test tube 5 to collect.

As a preferred embodiment of the present invention, the cap 4 and the drainage tube 2 are fixed to form a whole. The two are uniformly injection-molded through the mold during manufacture, that is, the two are uniformly sealed and packaged when they leave the factory, and doctors can avoid the cumbersome assembly of the two again when using them.

As a preferred embodiment of the present invention, the drainage tube 2 is marked with a size scale. Specifically, the drainage tube 2 is marked with a centimeter scale with the smallest scale at the millimeter level. After the lumbar puncture is successful, the doctor first measures the pressure of the cerebrospinal fluid. The doctor fixes the junction of the puncture needle 1 and its tail with the drainage tube 2 with one hand, and holds the end of the drainage tube 2 with the other hand and lifts it up vertically. The doctor reads the liquid level height of the cerebrospinal fluid rising in the drainage tube 2 and converts it into the pressure of the cerebrospinal fluid before starting to collect the cerebrospinal fluid.

In the collection process of cerebrospinal fluid, it is generally necessary to collect and store 3 to 6 samples separately, and do different researches and experiments respectively. In order to improve the work efficiency of doctors, as a preferred embodiment of the present invention, six groups of test tubes 5 are in a rectangular array. Placed on the test tube rack, the mouth of each test tube 5 is equipped with a sterile cotton ball 10, that is, when the doctor inserts the drainage tube 2 to collect the cerebrospinal fluid, the sterile cotton ball 10 is temporarily removed, and after the cerebrospinal fluid is collected, the sterile cotton ball 10 is placed again. Place the mouth of the test tube 5 for dust-proof, and use sterile cotton ball 10 to block the mouth of the test tube after the test tube collects cerebrospinal fluid in sequence. The test tube rack plays the role of supporting and positioning the test tube 5, and the test tube rack adopts a denser PVC material to improve the dead weight of the test tube rack and improve the stability of the test tube rack. The test tube rack of the present embodiment comprises a top plate 6 and a bottom plate 8. The top plate 6 has six circular holes for accommodating the test tubes 5. The diameter of the circular holes of the top plate 6 is slightly larger than the diameter of the test tubes 5, which is convenient for placing and taking out the test tubes 5. The top plate 6 and the bottom plate 8 Open test tube racks are formed by supporting rods arranged on the four corners of the bottom plate 8. Also be provided with measuring plate 7 between top plate 6 and base plate 8, measuring plate 7 is also provided with the circular hole that is convenient to test tube 5 to pass through, and the circular hole diameter of measuring plate 7 is also slightly greater than the diameter of test tube 5, and the both sides of measuring plate 7 Both are provided with adjusting bolts 9 for adjusting the height of the measuring plate 7, and the adjusting bolts 9 snap into the top plate 6 through the grooves, so that even if the adjusting bolts 9 are rotating, their relative positions with the top plate 6 will not change. At this time, it is the measuring plate 7 that is bolted to the adjusting bolt 9 to change its position.

The function of the measuring plate 7 is to facilitate observation and determine whether the collected cerebrospinal fluid reaches the required amount of the specimen. The principle is very simple. The measuring plate 7 moves up and down to determine the height corresponding to the volume of the cerebrospinal fluid collected by the test tube 5. When the doctor uses it, it can be more accurate. Accurately and intuitively collect the required sample volume, improve work efficiency and reduce human error. Too little collection will result in insufficient specimens to complete all experiments; too much collection may lead to low intracranial pressure in patients. Secondary, the measuring plate 7 can further position the test tube 5 and prevent it from tilting. In this embodiment, the measuring plate 7 is also made of PVC material and made into a sheet-like cuboid with a thickness of 2mm. However, in order to ensure the stability of the threaded hole of the measuring plate 7 in use, the thickness of the threaded hole connection needs to be 4mm.

In the present embodiment, the test tube 5 is a test tube with a diameter of 2 cm and a height of 10 cm; the length of the drainage tube 2 is 60 cm; the length of the test tube rack is about 15 cm, the width is about 9 cm, and the height is about 8 cm; the diameter of the adjusting bolt 9 is about 4 mm.

Of course, the design and creation are not limited to the above-mentioned embodiments. Those skilled in the art can also make equivalent modifications or replacements without violating the spirit of the utility model. These equivalent modifications or replacements are all included in the claims of this application. within the limited range.

Claims (9)

1. it is a kind of for lumbar puncture collect cerebrospinal fluid collection system, it is characterised in that：Including the puncture for lumbar puncture Pin（1）, the puncture needle（1）Afterbody and drainage tube（2）Connection, the drainage tube（2）The other end lead to test tube（5）, institute State drainage tube（2）On be additionally provided with for covering the test tube（5）Lid（4）, test tube described in some groups（5）By rectangle battle array Row are arranged on rack for test tube.

2. it is according to claim 1 for lumbar puncture collect cerebrospinal fluid collection system, it is characterised in that：The drainage Pipe（2）On be provided with control drainage tube（2）Conducting or the spring clip of closing（3）.

3. it is according to claim 1 for lumbar puncture collect cerebrospinal fluid collection system, it is characterised in that：The lid （4）It is round platform, the small end of the round platform can be embedded in the test tube（5）Bottleneck.

4. it is according to claim 1 for lumbar puncture collect cerebrospinal fluid collection system, it is characterised in that：The lid （4）With diameter greater than the test tube（5）Bore, the test tube can be covered（5）Bore, the lid（4）Edge have It is open towards the test tube（5）Baffle plate.

5. according to claim 3 or 4 for lumbar puncture collect cerebrospinal fluid collection system, it is characterised in that：It is described Lid（4）Be provided centrally be easy to the drainage tube（2）The circular hole for passing through.

6. it is according to claim 5 for lumbar puncture collect cerebrospinal fluid collection system, it is characterised in that：The lid （4）With drainage tube（2）Fixation forms a whole.

7. the collection system that cerebrospinal fluid is collected for lumbar puncture according to any one of Claims 1 to 4, its feature exists In：The drainage tube（2）Upper mark has.

8. it is according to claim 1 for lumbar puncture collect cerebrospinal fluid collection system, it is characterised in that：The test tube Frame includes base plate（8）And top board（6）, the top board（6）With for positioning the test tube（5）Circular hole, the base plate（8）With The top board（6）Between be provided with for measuring the test tube（5）The measurement plate of middle liquid level（7）.

9. it is according to claim 8 for lumbar puncture collect cerebrospinal fluid collection system, it is characterised in that：The measurement Plate（7）With being easy to the test tube（5）The circular hole for passing through, the measurement plate（7）By the regulation being arranged on the rack for test tube Bolt（9）Regulation upper-lower height.