CN115138413B

CN115138413B - Puncture type urinary catheter convenient for sampling

Info

Publication number: CN115138413B
Application number: CN202210922784.8A
Authority: CN
Inventors: 范自强; 秦新月; 张舒欣; 杨顺奇
Original assignee: Shijiazhuang Yuanding Medical Instrument Co ltd
Current assignee: Shijiazhuang Yuanding Medical Instrument Co ltd
Priority date: 2022-08-02
Filing date: 2022-08-02
Publication date: 2023-09-22
Anticipated expiration: 2042-08-02
Also published as: CN115138413A

Abstract

The application discloses a puncture type urinary catheter convenient for sampling, which comprises a catheter body, a catheter cap and a puncture film, wherein the catheter body is provided with an upper end opening at the lower end of the catheter body in a blocking manner; the pipe cap comprises a screw cap which is connected to the outer wall of the upper end of the pipe body in a threaded manner and a plug cylinder which is plugged in the upper end of the pipe body, the plug cylinder is in sealing fit with the pipe body, the top of the screw cap is fixedly connected with the top of the plug cylinder, and the puncture membrane is fixedly arranged at the bottom end of the plug cylinder; and a isolating plug for preventing the puncture membrane from being polluted is plugged in the plug cylinder, and the isolating plug is detachably connected with the plug cylinder. The isolating plug isolates the puncture membrane from the external environment, prevents the puncture membrane from being polluted by the surrounding environment when a patient leaves a sample, samples are transported and stored, and avoids bringing pollutants on the puncture membrane into a urine sample due to the contact of a sampling straw or a needle head with the puncture membrane during test sampling, thereby influencing the test result.

Description

Puncture type urinary catheter convenient for sampling

Technical Field

The application relates to the technical field of medical test equipment, in particular to a puncture type urinary catheter convenient for sampling.

Background

The traditional urinary catheter has two types, one of which is closed, and comprises a test tube and a cap covering the mouth of the test tube, and a urine sample is stored in the test tube. When testing, the tester first needs to unscrew the cap, then aspirate the urine sample in the test tube using a pipette or other sampling device, and then inject into the testing device for testing. The laboratory technician wears protective gloves when the operation, and the operation is very inconvenient when opening the block, still causes the urine sample to spill easily once losing the hand to produce the pollution to surrounding environment and on-the-spot instrument.

Another type of urinary catheter is open, i.e. the catheter is open, so that the smell of the urine sample can be emitted into the surrounding air and cause off-flavors and pollution. Meanwhile, the concentration and the components of the urine sample can be changed due to long-term contact and volatilization of the urine sample with air, and the urine sample is also easy to be polluted, so that the test result is affected.

Patent application publication No. CN111841678A discloses a quick-seal cap piercing urine conventional test tube, the test tube cap comprising a cap lower portion, a cap upper portion, and a piercing membrane. Because the puncture film is exposed to the surrounding environment, the puncture film is easy to be polluted by the surrounding environment during sample reserving and sample transferring and storing of patients. Once the piercing film is contaminated, during an assay sample, the sample pipette or needle may contact the piercing film, which may carry contaminants into the urine sample, thereby affecting the result of the assay. The patent application with publication number of CN113551945A discloses an automatic puncturing device of a vacuum blood collection tube capable of automatically sensing liquid level, and in the technical scheme disclosed in the application, the head of the vacuum blood collection tube is also easy to be polluted, so that the problem of influencing an assay result is solved.

Disclosure of Invention

The application aims to provide a puncture type urinary catheter which is convenient for sampling, and can prevent urine samples from being polluted during sampling while being convenient for sampling.

In order to achieve the above purpose, the technical scheme adopted by the application is as follows:

a puncture type urinary catheter convenient for sampling comprises a catheter body, a catheter cap and a puncture membrane, wherein the catheter body is provided with an opening at the upper end, the catheter cap is covered on the upper end of the catheter body, and the puncture membrane is fixedly arranged on the catheter cap; the pipe cap comprises a screw cap which is connected to the outer wall of the upper end of the pipe body in a threaded manner and a plug cylinder which is plugged in the upper end of the pipe body, the plug cylinder is in sealing fit with the pipe body, the top of the screw cap is fixedly connected with the top of the plug cylinder, and the puncture membrane is fixedly arranged at the bottom end of the plug cylinder; and a isolating plug for preventing the puncture membrane from being polluted is plugged in the plug cylinder, and the isolating plug is detachably connected with the plug cylinder.

Further, the isolation plug comprises a plug body with a bowl-shaped section, a bowl-shaped sliding cap is connected in the plug body in a sliding manner, a round table with a downward small end is arranged at the lower part of the sliding cap, a cylindrical sliding pin is connected on the side wall of the plug body in a penetrating and sliding manner, the inner end of the sliding pin is propped against the side surface of the round table of the sliding cap, an annular clamping groove is formed in the inner wall of the plug barrel at a position corresponding to the sliding pin, and the outer end of the sliding pin is positioned in the clamping groove; the top fixedly connected with closure plate of cock body, there is the clearance between closure plate and the cock body, be equipped with vertical spring in the slide cap, the spring upper end supports on the closure plate, the lower extreme of spring supports on the slide cap.

Further, the plug body is made of non-magnetic materials, and the plugging plate, the sliding cap and the sliding pin are made of soft magnetic materials.

Further, the material of the plug body is copper or austenitic stainless steel, and the material of the plugging plate, the sliding cap and the sliding pin is ferritic stainless steel or martensitic stainless steel.

Further, the surface of the plug body matched with the plug cylinder is a truncated cone-shaped surface with a small end facing downwards.

Further, a vertical communicating groove is formed in the outer wall of the sliding cap.

Further, the puncture membrane material is a metal film.

Further, the upper surface of the clamping groove is in a circular truncated cone shape with a large diameter.

Further, the puncture membrane is corrugated.

Further, the outer wall of the plug cylinder, which is close to the top, is provided with an annular sealing ring, and the sealing ring is propped against the inner wall of the pipe body.

The application has the positive effects that:

1. the application is provided with the pipe cap and the pipe body, and the puncture membrane is arranged on the pipe cap, so that the urine sample in the pipe body is isolated from the external environment, the pipe cap is not required to be unscrewed in the process of testing, the operation is convenient and rapid, the pollution caused by the overflow of the urine sample in the pipe body is avoided, and the testing efficiency is improved. As the urinary catheter is airtight, urine cannot volatilize into the air to generate peculiar smell, and the concentration and the components of the urine sample cannot change.

2. The isolation plug is plugged in the pipe cap, the puncture membrane is isolated from the external environment, the puncture membrane is prevented from being polluted by the surrounding environment when a patient leaves a sample and the sample is transported and stored, and the situation that pollutants on the puncture membrane are brought into a urine sample due to the contact of a sampling straw or a needle head and the puncture membrane when the sample is tested and sampled is avoided, so that the test result is affected.

3. The isolation plug comprises a plug body, a blocking plate, a spring, a sliding cap and a sliding pin, wherein the isolation plug is connected with the pipe cap in a clamping way through the sliding pin and the clamping groove, so that the connection is reliable, and the isolation plug cannot fall off from the pipe cap. The isolating plug is detached by adopting the magnet without using other tools, and the operator does not need to contact other objects during operation, so that the pollution of hands is avoided, and the detaching operation can be completed by using one hand, thereby being safe and reliable.

4. The upper surface of the clamping groove is a circular truncated cone-shaped surface with a large diameter, and the outer end of the sliding pin is propped against the circular truncated cone-shaped surface, so that downward force can be applied to the plug body, the plug body is tightly attached to the plug cylinder, pollutants are prevented from entering the lower surface of the plug body, and pollution is further caused to the puncture membrane.

5. The mating surface of the plug body and the plug cylinder is a round table-shaped surface, so that a gap exists between the plug body and the plug cylinder after the plug body and the plug cylinder are separated, and the gap can be larger and larger along with the upward movement of the plug body, thereby avoiding rupture of the puncture membrane caused by negative pressure generated between the plug body and the puncture membrane.

6. The puncture membrane is corrugated, and can be prevented from being broken due to expansion and contraction of air in the urinary catheter. And simultaneously, the puncture membrane can be prevented from being broken due to instantaneous negative pressure caused by too fast extraction of the isolation plug.

Drawings

FIG. 1 is an outline view of embodiment 1;

fig. 2 is a schematic structural view of embodiment 1;

FIG. 3 is an enlarged view of a portion I of FIG. 2;

FIG. 4 is a schematic illustration of the connection of the isolation plug to the cap of example 2;

FIG. 5 is a schematic illustration of the connection of the isolation plug to the cap of example 3;

in the figure:

1. a tube body; 2. a tube cap; 3. a spacer plug; 4. a plug body; 5. a closure plate; 6. a spring; 7. a sliding cap; 8. a slide pin; 9. puncturing the membrane; 10. a screw cap; 11. a plug cylinder; 12. a communication groove; 13. a clamping groove; 14. and (3) sealing rings.

Detailed Description

Example 1

As shown in fig. 1, 2 and 3, a puncture-type urinary catheter for facilitating sampling comprises a circular tubular body 1 having an upper end opening sealed at a lower end, a cap 2 covering the upper end of the tubular body 1, and a circular puncture membrane 9 fixedly provided on the cap 2. The pipe cap 2 comprises a cylindrical screw cap 10 which is connected to the outer wall of the upper end of the pipe body 1 in a threaded manner and a cylindrical plug barrel 11 which is plugged in the upper end of the pipe body 1, the plug barrel 11 is in sealing fit with the pipe body 1, the top of the screw cap 10 is fixedly connected with the top of the plug barrel 11, and the puncture membrane 9 is fixedly arranged at the bottom end of the plug barrel 11. The isolating plug 3 for preventing the puncture membrane 9 from being polluted is plugged in the plug barrel 11, and the isolating plug 3 is detachably connected with the plug barrel 11.

The outer wall of the plug 11 close to the top is provided with an annular sealing ring 14, the sealing ring 14 is propped against the inner wall of the pipe body 1, and the puncture membrane 9 is made of tin foil.

The nut 10 and the plug 11 are made of HDPE (high density polyethylene), and the nut 10, the plug 11 and the sealing ring 14 are integrated and formed by injection molding of HDPE materials during actual manufacturing. The pipe body 1 is formed by injection molding of a high-transparency PP (polypropylene) or PS (polystyrene) material. The production process is simple, is convenient for batch production and reduces the production cost.

The isolating plug 3 comprises a plug body 4 with a bowl-shaped section, a bowl-shaped sliding cap 7 is connected in the plug body 4 in a sliding manner, a small-head downward round table is arranged at the lower part of the sliding cap 7, two cylindrical sliding pins 8 which are symmetrically arranged by taking the axis of the plug body 4 as the center are arranged on the side wall of the plug body 4, and the sliding pins 8 are connected with the plug body 4 in a penetrating and sliding manner.

The inner ends of the sliding pins 8 respectively prop against the side surfaces of the round tables of the sliding caps 7, annular clamping grooves 13 are formed in the positions, corresponding to the sliding pins 8, of the inner walls of the plug cylinders 11, and the outer ends of the sliding pins 8 are inserted into the clamping grooves 13. The top of cock body 4 is through screw thread fixedly connected with closure plate 5, the center of closure plate 5 is equipped with and is used for with hexagon socket head cap wrench complex pit, there is the clearance between closure plate 5 and the cock body 4, be equipped with vertical spring 6 in the slide cap 7, the bottom surface at closure plate 5 is supported to spring 6 upper end, the bottom at slide cap 7 is supported to spring 6's lower extreme.

The material of the plug body 4 is brass. The materials of the blocking plate 5, the sliding cap 7 and the sliding pin 8 are martensitic stainless steel, such as stainless steel with the mark of 3Cr13, which is magnetically conductive and has anti-corrosion performance.

The matching surface of the plug 11 and the plug body 4 is a round table-shaped surface with a large diameter and a small diameter, and the plug 11 and the plug body 4 are in sealing fit by virtue of the round table-shaped surface.

The application process of the application is as follows:

1. the patient takes a urine sample through the sampling cup, then pours the urine sample into the tube body 1, and then closes the tube cap 2;

2. after the urine sample is sent to a laboratory, a laboratory operator holds the tube body 1, the closure plate 5 is tightly attached to a magnet, the sliding cap 7 slides upwards along the inner side of the closure body 4 under the attraction of the magnetic force of the magnet and is attracted to the bottom surface of the closure plate 5, in the process, the closure plate 5, the sliding cap 7 and the sliding pin 8 are made of soft magnetic materials and have magnetic conductivity, so that the sliding pin 8 can be attracted by the sliding cap 7 and slide along the side surface of a round table at the lower part of the sliding cap 7, in the sliding process, the sliding pin 8 slides transversely along the closure body 4, so that the sliding pin 8 is pulled out of the clamping groove 13, and then the isolation plug 3 is pulled out under the attraction of the magnet.

3. The laboratory technician uses a sampling pipette or needle to pierce the lancing membrane 9 and aspirate the urine sample from the tube 1 for testing.

Example 2

As shown in fig. 4, this embodiment is different from embodiment 1 in that:

the upper surface of the clamping groove 13 is a circular truncated cone-shaped surface with a large diameter, and the outer end of the sliding pin 8 is propped against the circular truncated cone-shaped surface, so that downward force can be applied to the plug body 4, the plug body 4 is tightly attached to the plug barrel 11, and pollutants are prevented from entering the lower surface of the plug body 4, and then the puncture membrane 9 is polluted.

Example 3

As shown in fig. 5, this embodiment is different from embodiment 2 in that:

the outer wall of the sliding cap 7 is provided with a vertical communication groove 12 along the circumferential direction, and the communication groove 12 communicates the air above and below the sliding cap 7, so that the sliding cap 7 is not blocked by the air inside the plug body 4 when sliding, and the sliding cap 7 slides more smoothly.

The puncture membrane 9 is corrugated, so that the volume change of the air in the urinary catheter caused by expansion with heat and contraction with cold can be compensated, and the puncture membrane 9 is prevented from being broken caused by the pressure change of the air in the urinary catheter caused by expansion with heat and contraction with cold. If the plug body 4 is pulled out from the plug barrel 11 too fast, the instant of detachment of the plug body 4 from the plug barrel 11 will generate an instant negative pressure between the plug body 4 and the puncture membrane 9 due to the increased volume. The corrugated puncture membrane 9 can play a role in compensation, and the puncture membrane 9 is prevented from being broken due to instantaneous negative pressure.

The foregoing description of the embodiments of the present application has been presented only to illustrate the technical spirit and features of the present application, and it is intended to enable those skilled in the art to understand the present application and to implement it, but not to limit the scope of the present application only by the present embodiments, i.e. equivalent changes or modifications to the spirit of the present application disclosed herein, and it is intended for those skilled in the art to make local improvements in the system and changes, variations between subsystems, etc. within the scope of the present application without departing from the structure of the present application. At present, the technical scheme of the application has been subjected to pilot-scale experiments, namely small-scale experiments of products before large-scale mass production; after the pilot test is completed, the use investigation of the user is performed in a small range, and the investigation result shows that the user satisfaction is higher; now, the industrialization of the formal production of the product is prepared, including the early warning investigation of intellectual property risks.

Claims

1. The puncture type urinary catheter convenient for sampling is characterized by comprising a catheter body (1) with an upper end opening plugged at the lower end, a catheter cap (2) covering the upper end of the catheter body (1) and a puncture membrane (9) fixedly arranged on the catheter cap (2); the pipe cap (2) comprises a screw cap (10) which is in threaded connection with the outer wall of the upper end of the pipe body (1) and a plug cylinder (11) which is plugged in the upper end of the pipe body (1), the plug cylinder (11) is in sealing fit with the pipe body (1), the top of the screw cap (10) is fixedly connected with the top of the plug cylinder (11), and the puncture membrane (9) is fixedly arranged at the bottom end of the plug cylinder (11); a isolating plug (3) for preventing the puncture membrane (9) from being polluted is plugged in the plug cylinder (11), and the isolating plug (3) is detachably connected with the plug cylinder (11);

the isolating plug (3) comprises a plug body (4) with a bowl-shaped section, a bowl-shaped sliding cap (7) is connected in the plug body (4) in a sliding manner, a round table with a small end downward is arranged at the lower part of the sliding cap (7), a cylindrical sliding pin (8) is connected on the side wall of the plug body (4) in a penetrating sliding manner, the inner end of the sliding pin (8) is propped against the side surface of the round table of the sliding cap (7), an annular clamping groove (13) is formed in the position, corresponding to the sliding pin (8), of the inner wall of the plug cylinder (11), and the outer end of the sliding pin (8) is positioned in the clamping groove (13); the top of the plug body (4) is fixedly connected with a plug plate (5), a gap is reserved between the plug plate (5) and the plug body (4), a vertical spring (6) is arranged in the sliding cap (7), the upper end of the spring (6) is propped against the plug plate (5), and the lower end of the spring (6) is propped against the sliding cap (7);

the plug body (4) is made of non-magnetic materials, and the plug plate (5), the sliding cap (7) and the sliding pin (8) are made of soft magnetic materials.

2. A puncture catheter for facilitating sampling according to claim 1, characterized in that the material of the plug body (4) is copper or austenitic stainless steel, and the material of the plug plate (5), the sliding cap (7) and the sliding pin (8) is ferritic stainless steel or martensitic stainless steel.

3. A puncture catheter for facilitating sampling according to claim 1, characterized in that the surface of the plug body (4) matched with the plug cylinder (11) is a truncated cone-shaped surface with a small end facing downwards.

4. The puncture-type urinary catheter convenient for sampling according to claim 1, wherein the outer wall of the sliding cap (7) is provided with a vertical communicating groove (12).

5. A puncture catheter for facilitating sampling according to claim 1, characterized in that the puncture membrane (9) material is a metallic film.

6. A puncture catheter for facilitating sampling according to claim 1, characterized in that the upper surface of the clamping groove (13) is in the shape of a circular truncated cone with a large diameter.

7. A puncture catheter for facilitating sampling according to claim 1, characterized in that the puncture membrane (9) is corrugated.

8. A puncture-type urinary catheter with convenient sampling according to claim 1, characterized in that the outer wall of the plug cylinder (11) close to the top is provided with an annular sealing ring (14), and the sealing ring (14) is abutted against the inner wall of the catheter body (1).