CN216559449U - Medical catheter friction test system - Google Patents

Abstract

The application discloses medical catheter frictional force test system, it includes: a control cabinet; the top of the control cabinet is provided with a lifting base and a computer, and is also provided with an experimental cavity with an opening at the top; a liquid replenishing tank is arranged in the control cabinet; the liquid supplementing tank is connected with the experiment cavity through a liquid supplementing pipe, and a first pump body is arranged on the liquid supplementing pipe; the experimental cavity is connected with a liquid supplementing tank through a liquid return pipe; the liquid supplementing tank is connected with the liquid inlet funnel through a liquid inlet pipe, and the liquid inlet funnel extends out of the outer side of the control cabinet; the liquid supplementing tank is also connected with a liquid discharge pipe; the liquid discharge pipe is connected to the outer side of the control cabinet; the lifting base is provided with a mounting groove extending along the vertical direction, and the mounting groove is movably provided with a clamping device and a hanging platform; the clamping device is positioned at the lower side of the hanging table and can move up and down along the extending direction of the mounting groove; the clamping device is provided with a clamping part, and the clamping part enters the experiment cavity when the clamping device moves to the bottom of the mounting groove. According to the technical scheme, the corresponding actual working environment can be simulated according to different types of medical catheters, and the pertinence and the effectiveness of the friction force test are improved.

Description

Medical catheter friction test system

Technical Field

The application relates to the technical field of medical instruments, in particular to a medical catheter friction force testing system.

Background

The medical catheter is a special catheter of a tube type used in the medical treatment or medical operation process and is used for assisting drainage or transfusion and the like. Clinically, according to the specific functionality realized by the medical catheter, the medical catheter can be further subdivided into a tracheal cannula, an endotracheal tube, a ventricular drainage tube, a wound drainage tube, a catheter, a gastric tube, a venous indwelling tube, a transfusion tube, a nasal oxygen tube and the like. In order to avoid the damage caused by the friction problem after the medical catheter is connected into the human body, the medical catheter needs to be subjected to a friction test experiment after being produced. The surface friction force test experiment of the existing medical catheter cannot well simulate the real working environment of the medical catheter, so that the tested friction force data cannot be well matched with the actual working requirements. Therefore, it is an object of the present invention to provide a device for friction testing of medical catheters.

SUMMERY OF THE UTILITY MODEL

The application provides a medical catheter frictional force test system can simulate corresponding actual work environment according to the medical catheter of different grade type in carrying out the frictional force test process, promotes the pertinence and the validity of frictional force test.

A medical catheter friction testing system, comprising: a control cabinet; the top of the control cabinet is provided with a lifting base and a computer, and the control cabinet is also provided with an experimental cavity with an opening at the top; the control cabinet is also provided with a key switch and an emergency stop switch, and the key switch and the emergency stop switch are respectively and electrically connected with the computer; a liquid replenishing tank is arranged in the control cabinet; the liquid supplementing tank is connected with the experiment cavity through a liquid supplementing pipe, and a first pump body is arranged on the liquid supplementing pipe; the experimental cavity is connected with a liquid supplementing tank through a liquid return pipe; the liquid supplementing tank is connected with the liquid inlet funnel, and the liquid inlet funnel extends out of the outer side of the control cabinet; the liquid replenishing tank is also connected with a liquid discharge pipe; the liquid discharge pipe is connected to the outer side of the control cabinet; the lifting base is provided with a mounting groove extending along the vertical direction, and the mounting groove is movably connected with the clamping device and the hanging table respectively; the clamping device is positioned at the lower side of the hanging table and can move up and down along the extending direction of the mounting groove; the clamping device is provided with a clamping part, and when the clamping device moves to the bottom of the mounting groove, the clamping part enters the experimental cavity.

By adopting the technical scheme: the liquid feeding funnel is arranged to inject simulated body fluids such as artificial blood, artificial tissue fluid, artificial joint fluid, artificial urine and the like into the liquid feeding tank from the outside, and the simulated body fluids are temporarily stored in the liquid feeding tank. When the friction force of the medical catheter is tested, the first pump body blows simulated body fluid in the fluid supplement tank into the experimental cavity, and the simulated body fluid circularly flows in the experimental cavity and the fluid supplement tank through the fluid return pipe from the experimental cavity, so that the internal environment of a human body is simulated. At the moment, the medical catheter to be detected is respectively clamped by the clamping device and the hanging table. At the same time, the clamping device is moved downwards until the clamping part enters the experimental cavity and is soaked in the simulated body fluid. Subsequently, the gripper is immobilized and the holding table is moved upward. The friction force F can be obtained based on the formula F ═ μ FN. Where FN is the vertical positive pressure and mu is the coefficient of friction. By adopting the scheme, corresponding body fluid environments such as urine environment, blood environment, tissue fluid environment, joint fluid environment and the like can be correspondingly simulated for medical catheters applied to different parts of a human body when a friction force experiment is carried out. Thereby obtaining the most accurate and targeted experimental data. When the liquid discharge pipe is arranged and the catheters of different models can be switched to carry out experiments, the simulated body fluid used in the previous experiment is emptied. The computer is conveniently externally started by setting the key switch. And the emergency stop control of the friction force experiment is realized by arranging an emergency stop switch.

Preferably, in the medical catheter friction force testing system described above: the device also comprises a heater and a temperature detector which are electrically connected with the computer, and the heater and the temperature detector are respectively connected with the liquid replenishing tank.

By adopting the technical scheme: the heater is used for heating the simulated body fluid in the fluid infusion tank for keeping the temperature constant, and different organ parts in the human body can be better simulated. Meanwhile, the temperature detector is used for reading the temperature coefficient in the fluid infusion tank in real time, so that the heating effect can be observed more visually and accurately.

More preferably, in the medical catheter friction force testing system described above: the inner walls of the liquid supplementing tank, the experiment cavity, the first pump body, the liquid supplementing pipe, the liquid return pipe, the liquid inlet pipe and the liquid discharge pipe are coated with anticoagulant coatings respectively.

By adopting the technical scheme: aiming at the coagulation characteristics possibly existing in simulated body fluids such as artificial blood, artificial tissue fluid and the like, the problem that equipment is difficult to clean due to the fact that the simulated body fluids are coagulated in the inner walls of a fluid infusion tank, an experimental cavity, a first pump body, a fluid infusion tube, a fluid return tube, a fluid inlet tube and a fluid discharge tube is solved by the anti-coagulation coating.

Further preferably, in the medical catheter friction force testing system: the clamping part comprises a clamping fixed plate and a clamping movable plate; the clamping fixed plate is provided with a rubber block seat; the clamping movable plate is provided with a friction rubber block and a sensor; a protective cover is arranged on the outer side of the sensor; and the clamping device is also provided with a position locking handle and an auxiliary handle.

By adopting the technical scheme: the medical catheter is clamped by the rubber block seat and the friction rubber block. In the experimental process, the detection is fed back to a computer by a sensor for displaying. Through setting up supplementary handle, the convenience reciprocates the clamping device along the mounting groove. The height locking of the clamping part when entering the detection station is realized by arranging the position locking handle.

Further preferably, in the medical catheter friction force testing system: and universal wheels are fixedly installed at the bottom of the control cabinet.

By adopting the technical scheme: realize the free removal of switch board based on the universal wheel, reduced the manual work of transport switch board consumption.

Further preferably, in the medical catheter friction force testing system: and the side wall of the control cabinet is provided with a heat dissipation air hole.

By adopting the technical scheme: the heat dissipation is realized to inside the control cabinet through the heat dissipation holes, the internal temperature of the control cabinet is prevented from being too high, and the service life of equipment is prolonged.

Compared with the prior art, the technical scheme of this application simple structure, easily realize, can simulate corresponding actual operational environment according to the medical catheter of different grade type in carrying out the frictional force test process, promote the pertinence and the validity of frictional force test.

Drawings

FIG. 1 is a structural view of example 1, in which a feed hopper is omitted;

FIG. 2 is a block diagram of the interior of the control cabinet of FIG. 1;

fig. 3 is a block diagram of the folder of fig. 1.

The correspondence between each reference numeral and the part name is as follows:

1. a control cabinet; 2. a lifting base; 3. a computer; 4. a laboratory cavity; 5. a universal wheel; 8. a key switch; 9. a scram switch; 11. a liquid replenishing tank; 13. a heater; 14. a temperature detector; 151. a liquid supplementing pipe; 152. a first pump body; 153. A liquid return pipe; 154. a liquid inlet funnel; 155. a liquid discharge pipe; 21. mounting grooves; 22. a hanging and holding table; 23. a clamp; 231. Clamping the fixed plate; 232. clamping the movable plate; 233. a rubber block seat; 234. a friction rubber block; 235. a protective cover; 236. a position locking handle; 237. an auxiliary handle.

Detailed Description

Examples 1 are shown in FIGS. 1-3:

a medical catheter friction testing system, comprising: a control cabinet 1; the top of the control cabinet 1 is provided with a lifting base 2 and a computer 3, and the control cabinet is also provided with an experimental cavity 4 with an opening at the top; the bottom of the control cabinet 1 is fixedly provided with universal wheels 5, and the side wall of the control cabinet 1 is provided with heat dissipation air holes.

The control cabinet 1 is also provided with a key switch 8 and an emergency stop switch 9; the key switch 8 and the emergency stop switch 9 are respectively electrically connected with the computer 3;

a liquid replenishing tank 11 is arranged in the control cabinet 1; the device further comprises a heater 13 and a temperature detector 14 which are electrically connected with the computer 3, wherein the heater 13 and the temperature detector 14 are respectively connected with the liquid replenishing tank 11.

The liquid supplementing tank is connected with the experiment cavity 4 through a liquid supplementing pipe 151, and a first pump body 152 is arranged on the liquid supplementing pipe 151; the experiment cavity 4 is connected with a liquid supplementing tank through a liquid return pipe 153; the liquid supplementing tank 11 is connected with a liquid inlet funnel 154, and the liquid inlet funnel 154 extends out of the control cabinet 1; the liquid replenishing tank 11 is also connected with a liquid discharging pipe 155; the drain pipe 155 is connected to the outer side of the control cabinet 1;

the lifting base 2 is provided with a mounting groove 21 extending along the vertical direction, and a clamping device 23 and a hanging table 22 are movably mounted on the mounting groove 21; the clamping device 23 is positioned at the lower side of the hanging table 22 and can move up and down along the extending direction of the mounting groove 21; the clamping device 23 is provided with a clamping part, and when the clamping device 23 moves to the bottom of the mounting groove 21, the clamping part enters the experiment cavity 4. Specifically, the method comprises the following steps: the clamping part comprises a clamping fixed plate 231 and a clamping movable plate 232; the clamping fixed plate 231 is provided with a rubber block seat 233; the clamping movable plate 232 is provided with a friction rubber block 234 and a sensor; a protective cover 235 is arranged on the outer side of the sensor; the clamp 23 is further provided with a position locking handle 236 and an auxiliary handle 237.

In this example: the inner walls of the liquid supplementing tank 11, the experiment cavity 4, the first pump body 152, the liquid supplementing pipe 151, the liquid returning pipe 153, the liquid inlet pipe and the liquid outlet pipe 155 are respectively coated with an anticoagulant coating.

In practice, the working process is as follows:

firstly, two ends of a medical catheter to be detected are respectively fixed on the clamping device 23 and the hanging table 22. And then based on the characteristics of the medical catheter at that time. Corresponding simulated body fluid is injected into the fluid infusion tank 11 from the outside, and the simulated body fluid is temporarily stored in the fluid infusion tank 11. When the friction force test of the medical catheter is performed, the first pump body 152 blows the simulated body fluid in the fluid infusion tank 11 into the experiment cavity 4, and the simulated body fluid circularly flows in the experiment cavity 4 and the fluid infusion tank 11 through the fluid return pipe 153 from the experiment cavity 4, so that the internal environment of the human body is simulated. At this time, the medical catheter is held by the clip 23 and the hanging table 22, and the clip portion of the clip 23 is inserted into the laboratory chamber 4 and immersed in the simulated body fluid. The gripper 23 is then held stationary and the holding table 22 is moved upward. At this time, the medical catheter to be examined becomes long. The friction force F can be obtained based on the formula F ═ μ FN. Where FN is the vertical positive pressure and mu is the coefficient of friction. By adopting the scheme, corresponding body fluid environments such as urine environment, blood environment, tissue fluid environment, joint fluid environment and the like can be correspondingly simulated for medical catheters applied to different parts of a human body when a friction force experiment is carried out. Thereby obtaining the most accurate and targeted experimental data.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims (5)

1. A medical catheter friction testing system, comprising: a control cabinet; the top of the control cabinet is provided with a lifting base and a computer, and the control cabinet is also provided with an experimental cavity with an opening at the top;

the control cabinet is also provided with a key switch and an emergency stop switch; the key switch and the emergency stop switch are respectively and electrically connected with the computer;

a liquid replenishing tank is arranged in the control cabinet; the liquid supplementing tank is connected with the experiment cavity through a liquid supplementing pipe, and a first pump body is arranged on the liquid supplementing pipe; the experimental cavity is connected with a liquid supplementing tank through a liquid return pipe; the liquid supplementing tank is connected with the liquid inlet funnel, and the liquid inlet funnel extends out of the outer side of the control cabinet; the liquid supplementing tank is also connected with a liquid discharge pipe; the liquid discharge pipe is connected to the outer side of the control cabinet;

the lifting base is provided with a mounting groove extending along the vertical direction, and the mounting groove is movably provided with a clamping device and a hanging table; the clamping device is positioned at the lower side of the hanging table and can move up and down along the extending direction of the mounting groove; the clamping device is provided with a clamping part, and the clamping part enters the experiment cavity when the clamping device moves to the bottom of the mounting groove;

the clamping part comprises a clamping fixed plate and a clamping movable plate; the clamping fixed plate is provided with a rubber block seat and a locking screw; the clamping movable plate is provided with a friction rubber block and a sensor; a protective cover is arranged on the outer side of the sensor; and the clamping device is also provided with a position locking handle and an auxiliary handle.

2. The medical catheter friction force testing system of claim 1, wherein: the device also comprises a heater and a temperature detector which are electrically connected with the computer, and the heater and the temperature detector are respectively connected with the liquid replenishing tank.

3. The medical catheter friction test system of claim 2, wherein: the inner walls of the liquid supplementing tank, the experiment cavity, the first pump body, the liquid supplementing pipe, the liquid return pipe, the liquid inlet pipe and the liquid discharge pipe are coated with anticoagulant coatings respectively.

4. The medical catheter friction force testing system of claim 1, wherein: and universal wheels are fixedly installed at the bottom of the control cabinet.

5. The medical catheter friction testing system as set forth in claim 4, wherein: and the side wall of the control cabinet is provided with a heat dissipation air hole.

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