Assembly for calibrating blocking alarm threshold value of injector

Abstract

The utility model discloses an assembly for calibrating a blocking alarm threshold value of an injector, which relates to the technical field of medical instruments and comprises an injection pump, a pressure calibration assembly and a digital display pressure gauge. The injection pump comprises a piston rod moving in the first direction and a push-pull box arranged at the end of the piston rod, a containing groove extending in the first direction and a control panel are arranged on the side edge of the injection pump, and a fixing assembly is arranged at the end, close to the push-pull box, of the containing groove. The pressure calibration assembly comprises a sensor fixing shell, a pressure sensor installed in the sensor fixing shell and a pressure rod connected with the pressure sensor, the sensor fixing shell can be installed in the containing groove through the fixing assembly, and the end of the pressure rod is connected with the push-pull box. The pressure rod abuts against a pressure detection button arranged on the side, close to the containing groove, of the push-pull box. The digital display pressure gauge can be connected with the pressure sensor and is used for reading the pressure borne by the pressure sensor. By means of the arrangement, the pipeline blocking threshold value of the injector can be calibrated.

Description

TECHNICAL FIELD

[0001] The utility model relates to medical instrument technical field, especially a kind of for calibrating syringe obstruction alarm threshold component. BACKGROUND

[0002] Injection pump has the problem of pipeline obstruction in drug infusion process, so injection pump is equipped with pressure detection function. Pipeline blockage liquid pressure rises to extrude pressure sensor, and obstruction alarm is generated when sensor reaches certain threshold. Injection pump manufacturer embeds some common syringe brands, because there are differences in the size data of each brand syringe, so the threshold of syringe obstruction alarm will be calibrated before factory shipment to meet the requirements claimed by manufacturer.

[0003] But there are many kinds of syringes on the market, and the syringes actually used in clinic can not be in the embedded syringe brand list, and hospitals do not have professional calibration tools to calibrate the pipeline obstruction threshold of syringe, which will cause the threshold of obstruction alarm to be inaccurate. If pipeline obstruction exists, a large amount of liquid will flow into the body under the action of positive pressure, which seriously affects the patients with fragile blood vessels, such as infants, ICU patients, puerpera and the elderly.

[0004] Therefore, how to provide a calibration assembly for calibrating the pipeline obstruction threshold of syringe is a technical problem to be solved by those skilled in the art at present. CONTENT OF UTILITY MODEL

[0005] The utility model aims at providing a calibration assembly for calibrating the pipeline obstruction threshold of syringe.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0007] A calibration assembly for calibrating the obstruction alarm threshold of syringe, comprising:

[0008] Injection pump, comprising piston rod for moving along first direction and push-pull box arranged at the end of piston rod, the side of injection pump is provided with containing groove extending along first direction and control panel, and the end of containing groove close to push-pull box is provided with fixing assembly;

[0009] Pressure calibration assembly, comprising sensor fixing shell, pressure sensor installed inside sensor fixing shell and pressure rod connected with pressure sensor, sensor fixing shell can be installed in containing groove through fixing assembly, and the end of pressure rod is connected with push-pull box, and pressure rod presses pressure detection button arranged on the side of push-pull box close to containing groove;

[0010] Digital pressure gauge, connected with pressure sensor, for displaying the pressure received by pressure sensor.

[0011] Preferably, the fixing component includes a clamping handle and a clamping plate. The clamping handle is horizontally inserted into the receiving groove and is used to control the opening or closing of the clamping plate. The clamping plate has an L-shaped structure and is movably installed into the receiving groove. The clamping plate tends to move towards the receiving groove to fix the syringe housing or sensor fixing housing.

[0012] Preferably, the end of the clamping handle is folded upwards to facilitate pressing the clamping handle.

[0013] Preferably, the push-pull box has two relatively rotatable grippers on the side near the receiving groove. The grippers are used to fix the end of the syringe plunger or the end of the pressure rod, and the pressure detection button is located between the two grippers.

[0014] Preferably, the push-pull box is equipped with a drive motor for rotating the gripper, and the top of the push-pull box is equipped with a switch button for controlling the start of the drive motor.

[0015] Preferably, the sensor mounting housing is a cylindrical structure with baffles on its circumference to prevent the sensor mounting housing from moving axially within the receiving groove.

[0016] Preferably, the sensor housing has a cavity for mounting the pressure sensor, and a fixing screw is provided at the bottom of the cavity to connect the pressure sensor.

[0017] Preferably, the sidewall of the receiving cavity is provided with a U-shaped groove so that the pressure sensor can be connected to a digital pressure gauge.

[0018] Preferably, one end of the pressure rod is provided with an external thread for threaded connection with the pressure sensor, and the other end is provided with a pressure plate for pressing against the pressure detection button.

[0019] Preferably, the syringe pump is equipped with a displacement sensor for detecting the movement distance of the piston rod.

[0020] Compared to the aforementioned background technology, the present invention provides a component for calibrating a syringe blockage alarm threshold, comprising: an injection pump, a pressure calibration component, and a digital display pressure gauge; the injection pump includes a piston rod that moves along a first direction and a push-pull box disposed at the end of the piston rod, and a receiving groove and a control panel extending along the first direction are provided on the side of the injection pump, with a fixing component disposed at the end of the receiving groove near the push-pull box; the pressure calibration component includes a sensor fixing housing, a pressure sensor installed inside the sensor fixing housing, and a pressure rod connected to the pressure sensor, the sensor fixing housing being able to be installed in the receiving groove by the fixing component, and the end of the pressure rod being connected to the push-pull box, and the pressure rod pressing against a pressure detection button disposed on the side of the push-pull box near the receiving groove; the digital display pressure gauge is able to be connected to the pressure sensor for reading the pressure received by the pressure sensor.

[0021] Specifically, first, the pressure calibration component is installed on the syringe pump. The pressure value displayed on the digital manometer is the pressure received by the pressure sensor. After setting the parameters of the syringe pump through the control panel, the infusion is started. The push-pull box retracts inward, generating a thrust on the pressure rod. This thrust is detected by the pressure detection button and recorded in the control panel. The control panel also records the value on the digital manometer. Based on the collected data, a mathematical relationship f is established between the pressure sensor output value and the squeezing force on the pressure detection button, and this relationship is stored in memory. Then, the pressure is calculated based on the syringe volume and scale length to be calibrated. The cross-sectional area of ​​the syringe is determined, and then the pressure corresponding to the preset alarm threshold inside the syringe is calculated based on the preset alarm threshold, i.e., the preset pressure inside the syringe. This pressure is the output value of the pressure sensor in the pressure calibration component. Finally, based on the mathematical relationship f between the pressure sensor output value and the applied squeezing force, the pressure value corresponding to the preset alarm threshold is obtained. This value is the alarm value that the injection pump needs to set. That is, when the pressure detection button on the push-pull box reaches this value, it means that the pressure inside the syringe has reached the alarm threshold. At this time, the injection pump will stop the piston rod and sound an alarm. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the structure of the syringe blockage alarm threshold calibration component provided in an embodiment of the present invention;

[0024] Figure 2 This is a schematic diagram of the syringe pump structure provided in an embodiment of the present utility model;

[0025] Figure 3 A schematic diagram of an injection pump structure equipped with a syringe provided in an embodiment of this utility model;

[0026] Figure 4 An exploded view of the pressure calibration component structure provided in this embodiment of the present invention;

[0027] Figure 5 This is a cross-sectional view of the pressure calibration component provided in an embodiment of the present invention.

[0028] in:

[0029] 100-Injection pump, 110-Piston rod, 120-Push-pull box, 121-Pressure detection button, 122-Gripper, 123-Switch button, 130-Receiving groove, 140-Control panel, 150-Clamping handle, 160-Clamping plate;

[0030] 200-Pressure calibration assembly, 210-Sensor mounting housing, 211-Baffle, 212-Fixing screw, 213-U-groove, 220-Pressure sensor, 230-Pressure rod, 231-Pressure plate;

[0031] 300-Digital display pressure gauge. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0033] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0034] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left" and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the indicated position or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations of this utility model.

[0035] The purpose of this invention is to provide a calibration component for calibrating the tubing blockage threshold of a syringe.

[0036] It should be noted that in this embodiment, the direction of X in the accompanying drawings is defined as the first direction.

[0037] To achieve the above objectives, the present invention provides the following technical solution:

[0038] Please see Figures 1 to 4This embodiment provides a component for calibrating syringe occlusion alarm thresholds, including: an injection pump 100, a pressure calibration component 200, and a digital display pressure gauge 300; the injection pump 100 includes a piston rod 110 that moves along a first direction and a push-pull box 120 disposed at the end of the piston rod 110; the side of the injection pump 100 is provided with a receiving groove 130 extending along the first direction and a control panel 140; a fixing component is disposed at the end of the receiving groove 130 near the push-pull box 120; the pressure calibration component 200 includes a sensor fixing housing. 210. A pressure sensor 220 and a pressure rod 230 connected to the pressure sensor 220 are installed inside the sensor mounting housing 210. The sensor mounting housing 210 can be installed in the receiving groove 130 by a fixing assembly. The end of the pressure rod 230 is connected to the push-pull box 120, and the pressure rod 230 presses against the pressure detection button 121 provided on the side of the push-pull box 120 near the receiving groove 130. A digital display pressure gauge 300 can be connected to the pressure sensor 220 to read the pressure received by the pressure sensor 220.

[0039] Specifically, the piston rod 110 of the injection pump 100 can reciprocate along a first direction, and the push-pull box 120 at its right end will also move accordingly. A recessed receiving groove 130 is provided on the front side of the injection pump 100. The syringe and the pressure calibration component 200 can be fixed in the receiving groove 130 by a fixing component. Then, the plunger of the syringe and the pressure rod 230 of the pressure calibration component 200 can move back and forth with the push-pull box 120. A pressure detection button 121 is provided at the contact position between the push-pull box 120 and the pressure rod 230 to detect the force exerted by the push-pull box 120 on the pressure rod 230 or the plunger of the syringe. In addition, the pressure sensor 220 in the pressure calibration component 200 in this embodiment can detect the thrust received by the push-pull box 120 when it pushes the pressure rod 230. This thrust is equivalent to the blocking pressure experienced by the syringe during use. The pressure sensor 220 can be directly connected to the digital display pressure gauge 300 to read the pressure received by the pressure sensor 220.

[0040] In use, first, the pressure calibration component 200 is installed on the syringe pump 100. The pressure value displayed on the digital pressure gauge 300 is the pressure received by the pressure sensor 220. After setting the parameters of the syringe pump 100 through the control panel 140, the infusion is started. The push-pull box 120 retracts inward, generating a thrust on the pressure rod 230. This thrust is detected by the pressure detection button 121 and recorded in the control panel 140. The control panel 140 also records the value on the digital pressure gauge 300. Based on the collected data, a mathematical relationship f is established between the output value of the pressure sensor 220 and the pressure received by the pressure detection button 121, and this relationship is stored in the memory. Then, based on the volume V and scale length L of the syringe to be calibrated, the cross-sectional area of ​​the syringe is calculated using the formula S=V / L. Then, based on the required preset alarm threshold P, i.e., the preset pressure inside the syringe, the pressure corresponding to the required preset alarm threshold inside the syringe is calculated using the formula F=P×S. This pressure is the pressure sensor in the pressure calibration component 200. The pressure value of pressure sensor 220 is measured and converted into a voltage output value by control panel 140. Finally, based on the mathematical relationship f between the voltage output value of pressure sensor 220 and the pressure force of pressure detection button 121, the voltage output value of pressure sensor 220 corresponding to pressure detection button 121 at the preset alarm threshold P is obtained. This output value is then converted into the pressure value by control panel 140, which is the alarm value that needs to be set for syringe pump 100. That is, when pressure detection button 121 on push-pull box 120 reaches this value, it means that the pressure inside the syringe has reached the alarm threshold. At this time, syringe pump 100 will stop the piston rod 110 and sound an alarm. In this way, the pressure value corresponding to pressure detection button 121 can be calculated in advance based on different blockage levels, i.e., blockage pressure, and the voltage output value of pressure sensor 220 corresponding to the pressure value can be obtained according to the previously obtained mathematical relationship f. This value is then stored in control panel 140 for use when syringe pump 100 is used.

[0041] Preferably, the fixing assembly includes a clamp handle 150 and a clamp 160. The clamp handle 150 is horizontally inserted into the receiving groove 130 and is used to control the opening or closing of the clamp. The clamp 160 has an L-shaped structure and is movably installed into the receiving groove 130. The clamp 160 tends to move towards the receiving groove 130 to fix the syringe housing or the sensor fixing housing 210.

[0042] like Figure 1 and Figure 3As shown, the fixing assembly is located at the end of the receiving groove 130 near the push-pull box 120, i.e., the right end of the receiving groove 130. It includes a clamping handle 150 and a clamping plate 160. The clamping handle 150 is horizontally inserted into the receiving groove 130, while the clamping plate 160 has an L-shaped structure. One side of the clamping plate is also horizontally inserted into the receiving groove 130, and the other side extends upwards, thus forming an upward-opening groove with the receiving groove 130. Furthermore, it should be noted that the clamping plate 160 is inserted into the receiving groove... The side of the receiving groove 130 always tends to move inward, that is, the clamping plate 160 tends to move closer to the receiving groove 130. In this embodiment, there is a linkage between the clamping plate handle 150 and the clamping plate 160. That is, by pressing the clamping plate handle 150 downward, the clamping plate 160 can be moved outward. When the clamping plate handle 150 is reset upward, the clamping plate 160 will automatically move inward. In this way, the clamping plate 160 can clamp the syringe or sensor fixing housing 210 placed therein.

[0043] Furthermore, the end of the clamping handle 150 is folded upward to facilitate pressing the clamping handle 150.

[0044] Understandably, in this embodiment, the end of the clamp handle 150 is folded upward at a certain angle, which makes it convenient for the operator to press downward.

[0045] Preferably, the push-pull box 120 is provided with two relatively rotatable grippers 122 on the side near the receiving groove 130. The grippers 122 are used to fix the end of the syringe plunger or the end of the pressure rod 230. The pressure detection button 121 is located between the two grippers 122.

[0046] Specifically, such as Figure 2 As shown, in this embodiment, in order to make the push-pull box 120 more stable when pushing the pressure rod 230 or the syringe plunger, two rotatable grippers 122 are symmetrically arranged on the left side of the push-pull box 120. The two grippers 122 can rotate relative to each other, and the two cooperate with each other to fix the right end of the pressure rod 230 or the syringe plunger. In addition, the pressure detection button 121 in this embodiment is arranged between the two grippers 122. This arrangement is to accurately and stably detect the pressure of the injection pump 100 on the syringe plunger.

[0047] Preferably, the push-pull box 120 is equipped with a drive motor for driving the gripper 122 to rotate, and the top of the push-pull box 120 is equipped with a switch button 123 for controlling the start of the drive motor.

[0048] Understandably, in order to facilitate the use of operators, a drive motor is provided inside the push-pull box 120 in this embodiment, which can simultaneously control the rotation of the two grippers 122, and the switch button 123 of the drive motor is located on the top of the push-pull box 120. This arrangement can improve the convenience of using the injection pump 100.

[0049] Preferably, the sensor mounting housing 210 is a cylindrical structure with a baffle 211 on its circumference to prevent the sensor mounting housing 210 from moving axially within the receiving groove 130.

[0050] Specifically, such as Figure 4 and Figure 5 As shown, the sensor fixing housing 210 is a cylindrical structure, and baffles 211 extending to both sides are provided on the circumference of the middle part. This design makes the sensor fixing housing 210 resemble the housing of a syringe, thereby reducing the error caused during detection. The baffles 211 are also provided to prevent the sensor fixing housing 210 from moving axially along the receiving groove 130 when the pressure rod 230 is pushed.

[0051] In this embodiment, the sensor mounting housing 210 is provided with a receiving cavity for mounting the pressure sensor 220, and a fixing screw 212 is provided at the bottom of the receiving cavity to connect the pressure sensor 220.

[0052] Specifically, such as Figure 4 and Figure 5 As shown, to facilitate the installation of the pressure sensor 220, a receiving cavity is provided at the right end of the sensor mounting housing 210. The size of this receiving cavity is exactly matched with the size of the receiving cavity, that is, the pressure sensor 220 can be installed inside the receiving cavity. In addition, the pressure sensor 220 is fixed by a fixing screw 212. Specifically, a cavity is also provided at the left end of the sensor mounting housing 210. This cavity is used to accommodate the fixing screw 212. The fixing screw 212 can pass through the bottom of the receiving cavity and connect to the pressure sensor 220. With this configuration, the pressure calibration assembly 200 has a simple structure and is easy to assemble.

[0053] Furthermore, a U-shaped groove 213 is provided on the side wall of the receiving cavity so that the pressure sensor 220 can be connected to the digital display pressure gauge 300.

[0054] To prevent the pressure sensor 220 from shaking or rotating when the pressure rod 230 is pushed, a U-shaped groove 213 is provided on the side wall of the receiving cavity. When the pressure sensor 220 is installed in the receiving cavity, its port connected to the digital display pressure gauge 300 can be snapped into the U-shaped groove 213. This setting also facilitates the connection of the digital display pressure gauge 300.

[0055] Furthermore, one end of the pressure rod 230 is provided with an external thread that is threaded to the pressure sensor 220, and the other end is provided with a pressure plate 231 for pressing against the pressure detection button 121.

[0056] like Figure 4 and Figure 5 As shown, the pressure rod 230 has an overall structure similar to the plunger of a syringe. Its right end is provided with a pressure plate 231 that abuts against the pressure detection button 121 on the push-pull box 120. Its other end is provided with an external thread, which can be directly threaded to the pressure sensor 220.

[0057] Preferably, the syringe pump 100 is equipped with a displacement sensor for detecting the movement distance of the piston rod 110.

[0058] Understandably, in order to obtain the scale length L inside the syringe more accurately, conveniently and quickly during calibration, a displacement sensor can be installed inside the syringe pump 100. This displacement sensor can detect the distance moved by the piston rod 110, thereby directly obtaining the scale length L inside the syringe.

[0059] It should be noted that in this specification, relational terms such as first and second are used only to distinguish one entity from several other entities, and do not necessarily require or imply any such actual relationship or order between these entities.

[0060] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0061] The embodiments provided by this utility model have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this utility model. The descriptions of the embodiments above are only for the purpose of helping to understand the method and core ideas of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principles of this utility model, and these improvements and modifications also fall within the protection scope of this utility model.

Claims

1. A component for calibrating syringe clogging alarm thresholds, characterized in that, include: An injection pump (100) includes a piston rod (110) for moving along a first direction and a push-pull box (120) disposed at the end of the piston rod (110). The side of the injection pump (100) is provided with a receiving groove (130) extending along the first direction and a control panel (140). A fixing component is provided at the end of the receiving groove (130) near the end of the push-pull box (120). The pressure calibration assembly (200) includes a sensor mounting housing (210), a pressure sensor (220) installed inside the sensor mounting housing (210), and a pressure rod (230) connected to the pressure sensor (220). The sensor mounting housing (210) can be installed in the receiving groove (130) by the fixing assembly, and the end of the pressure rod (230) is connected to the push-pull box (120), and the pressure rod (230) presses against the pressure detection button (121) provided on the side of the push-pull box (120) near the receiving groove (130). A digital pressure gauge (300) is connected to the pressure sensor (220) and is used to display the pressure received by the pressure sensor (220).

2. The component for calibrating syringe blockage alarm thresholds according to claim 1, characterized in that, The fixing assembly includes a clamping handle (150) and a clamp (160). The clamping handle (150) is horizontally inserted into the receiving groove (130). The clamping handle (150) is used to control the opening or closing of the clamp (160). The clamp (160) has an L-shaped structure and is movably installed in the receiving groove (130). The clamp (160) tends to move towards the receiving groove (130) to fix the syringe housing or the sensor fixing housing (210).

3. The component for calibrating syringe blockage alarm thresholds according to claim 2, characterized in that, The end of the clamping handle (150) is folded upward to facilitate pressing of the clamping handle (150).

4. The component for calibrating syringe blockage alarm thresholds according to claim 1, characterized in that, The push-pull box (120) has two relatively rotatable grippers (122) on the side near the receiving groove (130). The grippers (122) are used to fix the end of the syringe plunger or the end of the pressure rod (230). The pressure detection button (121) is located between the two grippers (122).

5. The component for calibrating syringe blockage alarm thresholds according to claim 4, characterized in that, The push-pull box (120) is equipped with a drive motor for driving the gripper (122) to rotate, and the top of the push-pull box (120) is equipped with a switch button (123) for controlling the start of the drive motor.

6. The component for calibrating syringe blockage alarm thresholds according to claim 4, characterized in that, The sensor mounting housing (210) is a cylindrical structure with a baffle (211) on its circumference to prevent the sensor mounting housing (210) from moving axially within the receiving groove (130).

7. The component for calibrating syringe blockage alarm thresholds according to claim 6, characterized in that, The sensor mounting housing (210) is provided with a receiving cavity for mounting the pressure sensor (220), and a fixing screw (212) is provided at the bottom of the receiving cavity to connect the pressure sensor (220).

8. The component for calibrating syringe blockage alarm thresholds according to claim 7, characterized in that, The side wall of the receiving cavity is provided with a U-shaped groove (213) so that the pressure sensor (220) can be connected to the digital display pressure gauge (300).

9. The component for calibrating a syringe blockage alarm threshold according to claim 8, characterized in that, One end of the pressure rod (230) is provided with an external thread that is threaded to the pressure sensor (220), and the other end is provided with a pressure plate (231) for pressing the pressure detection button (121).

10. The component for calibrating a syringe blockage alarm threshold according to claim 1, characterized in that, The syringe pump (100) is equipped with a displacement sensor for detecting the movement distance of the piston rod (110).

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