CN105118350B - One kind is new to be quantified to be injected intravenously and puncture analog training device - Google Patents

Abstract

The invention relates to a novel quantifiable intravenous injection and puncture simulation training device, which comprises a shell, a needle, a cap, a connecting rod, a base and a force sensor. The needle is clamped on the connecting rod and connected with the force sensor, the force sensor is fixed to the shell through the base, and the puncture force is transmitted to the force sensor through the connecting rod to realize the measurement of the puncture force. The beneficial effect of the present invention is to observe the return of blood through the special drawing-out mode of the needle plastic tube; the size of the puncture force can be measured in real time, and the change of the puncture force during the process of the blood vessel being pierced by the needle and the blood vessel being pierced is displayed, and the internal structure limits the needle. The maximum stroke of the movement protects the force sensor from damage, and the medical staff adjusts the technical movements to reduce the puncture force to achieve the best injection and puncture training effect. In addition, the compact design of the device makes it similar to the real application situation, which is convenient for medical staff to transfer the mastered technical movements from practice to clinical application.

Description

A new quantifiable intravenous injection and puncture simulation training device

technical field

The invention belongs to the fields of clinical medicine and biomechanics, and relates to a novel quantifiable intravenous injection and puncture simulation training device.

Background technique

Intravenous injection and puncture are commonly used and very important technical means in clinical practice, and they are invasive. During the process of intravenous injection and puncture, it is easy to cause pain to patients. If puncture fails, it will aggravate the pain of patients. For children and the elderly, the damage caused is more significant and affects Curative effect, for the rescue of critically ill patients, a successful puncture is very important, if the operation is not done properly, it may be life-threatening. Therefore, as a medical staff, it is very important to be proficient in intravenous injection and puncture techniques. As a clinical technology, the improvement of intravenous injection and puncture technology requires medical staff to accumulate experience, but it cannot be tested on patients. At present, there are intravenous injection and puncture models for medical staff to practice puncture techniques. Since this type of simulation training device does not have any feedback during the test process, it is difficult to improve the technical level; in order to improve the level of injection and puncture, some medical staff use unacceptable methods. , using your own veins for practice.

In the process of intravenous injection and puncture, because the puncture force is very small, the puncture process is very short, and the puncture force directly determines the pain degree of the patient and the degree of damage to the blood vessel. At present, in the simulated practice of intravenous injection and puncture by medical staff, there is no simulation training device that can feedback the puncture force, and it is difficult to improve the puncture technique. This problem needs to be solved urgently.

Contents of the invention

The present invention is to overcome the deficiencies in the prior art, and invent a new type of quantifiable intravenous injection and puncture simulation training device, which overcomes the defects that medical staff do not have any feedback during the simulation exercise process, and it is difficult to improve the technical level. The simulation training device can real-time Measure the change of needle puncture force to help medical staff understand their own technical shortcomings and improve their technical level.

In order to achieve the above object, technical scheme of the present invention is:

A novel quantifiable intravenous injection and puncture simulation training device includes a shell, a needle, a cap, a connecting rod, a base and a force sensor.

The shell is divided into two parts, one part has a recess, the other part has a protrusion, and the recess and the protrusion are interlocked to realize assembly; the top of the shell is a cone, and there is a circular opening above the cone, and the upper half of the shell is Cylinder, one side of the cylinder has a through hole, the lower part is a square body, one side of the square body has a through hole, the inside of the shell is hollowed out according to the shape of each part, used to fix the internal parts, and it has both support and protective effect.

The needle is made of metal, placed in the circular opening of the cone on the top of the casing, the lower end of the needle is connected with the plastic tube of the needle, and the needle is used to complete the injection and puncture process.

The cap is used to fix the needle. It is a cylinder with a hole through the top and bottom. The hole is divided into upper and lower parts. The outer diameter of the circular contour formed; put the cap through the needle and put it on the two clips. Since the aperture of the lower half is smaller than the outer diameter of the circular contour formed by the two clips, the two clips are forced to elastically deform and clamp The needle, the friction generated by the needle and the two clips is greater than the puncture force, and when the needle punctures, the puncture force is transmitted to the force sensor through the connecting rod.

The connecting rod is used to connect the force sensor and the needle, and protect the force sensor while transmitting the puncture force. The connecting rod is divided into three sections. The upper end is a cylinder with gaps on both sides formed by two symmetrical fan-shaped clips, and the middle section is a circle. Shaped grille, the lower end is a threaded rod; the upper clip of the connecting rod is used to clamp the needle, and the needle plastic tube is led out through the gap between the two clips and the through hole on the side of the cylinder in the upper half of the casing, and fixed on the side of the casing , to avoid the movement of the needle plastic tube affecting the measurement of the puncture force, and at the same time realize the measurement of the puncture force while observing the blood return after successful venipuncture; the circular block in the middle section is installed on the disc with a hole in the center of the upper half of the cylinder Within the range of 0.1-1 mm above; the threaded rod at the lower end is connected with the threaded hole at the upper end of the force sensor.

The base is composed of a circular chassis and a threaded base rod. The circular chassis is installed in the circular slot of the lower half of the square body of the shell. The threaded base rod is connected with the threaded hole at the lower end of the force sensor for fixing the force sensor.

The force sensor is a square body, installed in the square groove in the lower half of the shell, and fixed to the shell through the base. The threaded hole of the base is connected with the threaded rod of the base, and one side of the force sensor is connected with the wire of the force sensor. The measuring range of the force sensor is 0-10N.

The method of measuring the puncture force of the simulation training device is to use the combination of the needle head and the force sensor, convert the puncture force signal into an electrical signal through the force sensor, and then convert the electrical signal into a digital signal through a digital transmitter, and output it to the computer The main engine measures the puncture force in real time; the simulation training device uses displacement limitation to protect the force sensor from damage. When the displacement of the needle increases to a certain extent, the circular block contacts the disc with the central opening to prevent the needle from being damaged. The displacement increases further.

The present invention combines the force sensor with the needle, transmits the puncture force to the force sensor through the connecting rod, can measure the size of the puncture force in real time, and displays the change of the puncture force during the process of the blood vessel being pierced by the needle and the process of piercing into the blood vessel. The internal structure is limited. The maximum stroke of the needle movement is guaranteed, and the force sensor is protected from damage. The medical staff holds the simulation training device, and during the intravenous injection and puncture training on the arm model, the puncture force can be obtained, and the puncture force is proportional to the pain of the patient. The medical staff can adjust the The size of your own movements and force can reduce the puncture force and achieve the best training effect. The simulation training device enables the blood return to be observed while measuring the puncture force through the special drawing-out method of the needle plastic tube. It can display the changes of the puncture force in various situations during the process of the needle piercing the leaking blood vessel and the needle piercing into the blood vessel. It is more effective than simple blood return observation and artificial feeling, which greatly helps medical staff understand their own technical shortcomings and adjust the technology in time. action to improve the training effect. In addition, the shell design of the simulation training device is compact, flexible, and light. The shape of the upper part of the shell is similar to the actual needle, which is convenient for medical staff to transfer the mastered technical movements from simulated exercises to clinical applications.

Description of drawings

Fig. 1 is a schematic diagram of a new quantifiable intravenous injection and puncture simulation training device.

Figure 2 is a partial enlarged view of the simulation training device.

In the figure: 1 needle; 2 cap; 3 recessed/protruded; 4 clip; 5 connecting rod; 6 disc; 7 shell; 8 force sensor; 9 base threaded rod; 10 circular slot; 12 base; 13 force sensor wire; 14 through hole; 15 threaded rod; 16 circular block; 17 needle plastic tube; 18 through hole.

detailed description

The present invention will be further described below in conjunction with the accompanying drawings.

The threaded rod 9 of the base is screwed with the threaded hole at the lower end of the force sensor 8, the threaded rod 15 at the lower end of the connecting rod is screwed with the threaded hole at the upper end of the force sensor 8, and after the needle plastic tube 17 is fixedly connected with the lower end of the needle 1, put the needle 1 into the In the middle of the clip 4 at the upper end of the connecting rod 5 , after putting the cap 2 over the metal needle of the needle 1 , cover it on the clip 4 at the upper end of the connecting rod 5 to fix the needle 1 .

After the above-mentioned parts are assembled, they are fixed in the shell 7 together. The lower circular chassis 11 of the base 12 is snapped into the lower half of the circular slot 10 of the housing 7, and by adjusting the depth at which the connecting rod 5 is screwed into the force sensor 8, the middle circular block 16 of the connecting rod 5 is positioned on the housing 7. In the range of 0.1 to 1 mm above the center opening disc 6 in the upper half, a circular block 16 protects the force sensor 8 from damage.

The needle plastic tube 17 is clamped in the side through hole 18 of the upper part of the shell 7, and the force sensor wire 13 is clamped in the side through hole 14 of the lower part of the shell 7. This fixing method makes the needle plastic tube 17 and the force The sensor wires 13 are all fixed on the housing 7 to prevent the dragging of the needle plastic tube 17 and the force sensor wire 13 from introducing extra force, which affects the measurement of the puncture force.

Finally, the other half of the shell is covered on the half of the shell, and the concave and convex are interlocked to play a fixed role and facilitate disassembly at the same time. Connect the force sensor wire 13 to the host computer through a digital transmitter, turn on the power, hold the simulation training device, and perform a puncture test on the medical simulation arm, and the puncture force can be seen from the data reading software in the host computer , so that it is possible to judge whether the puncture technique is appropriate, and then adjust the technical action, so that the trainee has a quantitative concept of puncture, and can complete the injection and puncture simulation training more clearly.

Claims (2)

1. one kind is new quantifies to be injected intravenously and puncture analog training device, and the analog training device includes shell (7), pin Head (1), block (2), connecting rod (5), base (12) and force snesor (8)；

The shell (7) is two parts, and a part has recessed, and a part has a projection, it is recessed and it is raised interlock, realize assembling；Outward The top of shell (7) is bullet, and there is a round hole bullet top, and shell (7) top half is cylinder, cylinder side There is a through hole (18), the latter half is square body, and there is a through hole (14) square body side, and shell (7) is internal according to each The shape of part is emptied, for fixing internal part；

The syringe needle (1) is metal material, is placed in the round hole part of shell (7) top tapered body, syringe needle (1) lower end and pin Head plastic pipe (17) is connected；

For fixed needle (1), block (2) is cylinder to the block (2), is provided with the hole of up/down perforation, and hole is divided into upper and lower two Part, more than the metal tube external diameter of syringe needle (1), the latter half aperture is less than the intermediate plate of connecting rod (5) upper end two in top half aperture (4) external diameter of the cylindrical profile for being formed；By block (2) through syringe needle (1), it is enclosed within two intermediate plates (4), the latter half aperture The external diameter of the cylindrical profile formed less than two intermediate plates (4), two intermediate plates (4) produce elastic deformation to clamp syringe needle (1)；Syringe needle (1) frictional force produced with two intermediate plates (4) is more than puncture force, and when syringe needle (1) is punctured, puncture force passes through connecting rod (5) It is conducted to force snesor (8)；

The connecting rod (5) protects force snesor for connecting force snesor (8) and syringe needle (1) while transmission puncture force (8)；Connecting rod (5) is divided into three sections, and upper end is the cylinder that there is space the both sides that two pieces of symmetrical fan-shaped intermediate plates (4) are formed, in Section is circular lattice gear (16), and lower end is threaded rod (15)；Connecting rod (5) upper end intermediate plate (4) are for clamping syringe needle (1), syringe needle modeling The space and shell (7) top half cylindrical sides through hole (18) that sebific duct (17) is passed sequentially through between two pieces of intermediate plates (4) are derived, It is fixed on shell (7) side；Circular lattice gear (16) in stage casing are installed on the circle of center drilling in shell (7) top half cylinder In the range of 0.1~1 millimeter of disk (6) top；Lower end threaded rod (15) is connected with the screwed hole of force snesor (8) upper end；

The base (12) is made up of circular base plate (11) and whorl of base bar (9), and circular base plate (11) is under shell (7) In the rounded groove (10) of half part square body, whorl of base bar (9) is connected with the screwed hole of force snesor (8) lower end, is used for Fixed force snesor (8)；

The force snesor (8) is square body, is installed in the square groove of shell (7) the latter half, by base (12) with it is outer Shell (7) is fixed, and the upper and lower ends of force snesor (8) are threaded hole, and threaded upper ends hole is connected with the threaded rod (15) of connecting rod Connect, lower end screwed hole is connected with whorl of base bar (9), the side of force snesor (8) is connected with force snesor wire (13), power The range of sensor (8) is 0~10N.

2. the method that the analog training device described in usage right requirement 1 measures puncture force, it is characterised in that using syringe needle (1) With the mode that force snesor (8) is combined, electric signal is converted to by force signal is punctured by force snesor (8), then by numeral Transmitter converts electrical signals to data signal, and output to host computer measures the size of puncture force in real time；Limited using displacement Mode protect force snesor (8) without damage, when syringe needle (1) displacement increase to a certain extent when, circular lattice gear (16) are with Disk (6) contact of heart perforate, prevents syringe needle (1) displacement from further increasing.