CN107715232A - Automatic-boosting infusion device - Google Patents

Abstract

The invention relates to clinical medical equipment, in particular to an automatic pressurized transfusion device. Including pressure bags, inflation and exhaust pipes, pressure switches are set on the inflation and exhaust pipes, air bags, pressure sensors, liquid level sensors, ultrasonic flow sensors, electric inflation and exhaust pumps and PLC controllers, pressure bags and pressure sensors are set separately In the airbag, the airbag is connected with the electric inflation and exhaust pump through the inflation and exhaust pipe, the liquid level sensor is set in the pressure bag, the ultrasonic flow sensor is set on the inflation and exhaust pipe, the pressure switch, the pressure sensor, the liquid level sensor, the ultrasonic flow sensor , the electric charging and exhausting pumps are respectively electrically connected with the PLC controller. The present invention adopts digital technology to set the input rate of liquid per minute according to clinical needs to meet the needs of clinical operations, realize automatic control of the flow rate of input liquid, supply liquid to patients regularly and quantitatively at a constant rate, monitor the total amount of liquid, and timely Replace the liquid, prevent the gas from entering the body, have strong practicability, and realize the intelligent management of the input liquid flow.

Description

Automatic pressurized infusion device

technical field

The invention relates to clinical medical equipment, in particular to an automatic pressurized transfusion device.

Background technique

Intravenous infusion can use the pressure of atmospheric pressure to inject liquid into the body, while arterial infusion itself needs a certain pressure to overcome arterial resistance, and the catheter sheath and catheter inserted into the artery, between the catheter and the guide wire, because the gap is small Therefore, there must be sufficient pressure to ensure that the heparin saline can be perfused uniformly and stably, so as to prevent the formation of thrombus in this gap due to factors such as slow blood flow and foreign body stimulation. Especially in the process of clinical operation and emergency treatment of patients, it is necessary to supply a large amount of liquid to the patient. Arteriovenous infusion is an important part of clinical operation treatment, and pressurized infusion is a common method in emergency first aid. The existing pressurized infusion device has the following problems: : (1) The pressure bag is not an electronic automatic control device. When using it, it must be monitored by a special person at the bedside, and it must be replaced in time after the infusion to prevent air embolism; (2) It is necessary to check the marking line of the pressure column every 10 minutes and manually inflate it Supplement the pressure in time to prevent the microthromboembolism generated between the catheter and the guide wire from embolizing the distal angiographic vessel; (3) The amount of fluid input per unit time cannot be accurately calculated during emergency treatment.

Contents of the invention

The present invention aims to solve the above problems, thereby providing an automatic pressurized infusion device capable of automatically controlling the flow rate of injected liquid, monitoring the total amount of liquid, and maintaining the stability of the flow rate.

The present invention solves said problem, and the technical scheme adopted is:

An automatic pressurized infusion device, including a pressure bag, an inflation and exhaust pipe, a pressure switch is arranged on the inflation and exhaust pipe, an air bag, a pressure sensor, a liquid level sensor, an ultrasonic flow sensor, an electric inflation and exhaust pump, and a PLC controller , the pressure bag and the pressure sensor are respectively set in the air bag, the air bag is connected with the electric charge and exhaust pump through the inflation and exhaust pipe, the liquid level sensor is set in the pressure bag, the ultrasonic flow sensor is set on the inflation and exhaust, the pressure switch, the pressure sensor, The liquid level sensor, the ultrasonic flow sensor, and the electric charging and exhausting pump are respectively electrically connected to the PLC controller.

Adopt the present invention of above-mentioned technical scheme, compared with prior art, its outstanding feature is:

① The minimum amount of liquid can be set through the PLC controller. If it is lower than the set limit, an alarm will be given, and the nursing staff will replace it in time without special supervision;

②The pressure of the pressure bag can be set by controlling the PLC controller, and it will be automatically inflated when the pressure is insufficient, without manual inflation by the nursing staff;

③In first aid, the amount of liquid to be infused per unit time can be set through the PLC controller to ensure accurate infusion per unit time.

④Using digital technology, the input rate of liquid per minute can be set according to clinical needs to meet the needs of clinical operations. It can automatically control the flow rate of input liquid and supply liquid to patients regularly and quantitatively at a constant rate. The infusion bag is used to isolate electrical components. Only through the inflation and exhaust pipe for gas pressure delivery, a pressure sensor is installed in the airbag to return the pressure data in the airbag, the input flow rate is controlled by the PLC controller to be stable and safe, and the intelligent management of the input liquid flow is realized, which ensures that it can be used in clinical operations A large amount of fluid needs to be supplied to the patient in emergency and first aid;

⑤The structure is simple, the design is reasonable, and the practicability is strong.

Description of drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention;

Fig. 2 is a block diagram of the circuit signal direction of the embodiment of the present invention;

In the figure: airbag 1; pressure bag 2; inflation and exhaust pipe 3; electric inflation and exhaust pump 4; pressure switch 5; ultrasonic flow sensor 6; infusion tube 7; liquid level sensor 8; pressure sensor 9; PLC controller 10.

detailed description:

The present invention will be further described below in conjunction with the examples, the purpose is only to better understand the contents of the present invention, therefore, the examples given do not limit the protection scope of the present invention.

Referring to Fig. 1 and Fig. 2, an automatic pressurized infusion device includes a pressure bag 2, an infusion tube 7, a pressure switch 5 is arranged on the infusion tube 7, an air bag 1, a pressure sensor 9, a liquid level sensor 8, an ultrasonic flow rate The sensor 6, the electric inflation pump 4 and the PLC controller 10, the pressure bag 2 and the pressure sensor 9 are respectively arranged in the airbag 1, the airbag 1 is connected with the electric inflation pump 4 through the inflation pipe 3, and the liquid level sensor 8 is arranged in the In the infusion bag 2, the ultrasonic flow sensor 6 is arranged on the infusion tube 7, the pressure switch 5, the pressure sensor 9, the liquid level sensor 8, the ultrasonic flow sensor 6, and the electric charging and exhausting pump 4 are respectively electrically connected to the PLC controller 10.

The PLC controller 10 realizes the setting and control of the input flow rate of the liquid and the pressure of the liquid. The PLC controller 10 includes inflation power, pressure setting, actual pressure display, total liquid display, liquid input volume, low liquid pressure, etc. according to clinical needs. Bit sound and light alarm, CPU digital program continuous control consists of seven units. The error of all set values is within ±2%. Inflate the airbag 1, the required pressure value is fed back to the PLC controller 10 according to the measured flow rate, stop supplying air to the inflatable bag 1 when the pressure is close to 90% of the set maximum value, if the set value of the flow rate is not reached, the light flashes to prompt Adjust the maximum limit value of the airbag 1 pressure. If the flow rate reaches the set flow rate within the set value range, the electric inflation pump 4 stops inflating the airbag 1, and maintains the pressure at plus or minus 5% to maintain the stability of the flow rate.

The pressure sensor 9, the ultrasonic flow sensor 6, and the liquid level sensor 8 detect that the maximum value exceeds the set value, stop inflating the air bag 1 and depressurize the air bag 1 by 10% of the set value.

The PLC controller 10 provides an air source according to the set value and controls the electric inflation and exhaust pump 4 to inflate the airbag 1, and picks up the data of the pressure sensor 9 and the liquid level sensor 8 for comparison. If the total amount of liquid is less than 25% of the set amount, send an instruction to The electric inflation pump 4 inflates the air bag 1. When the total amount of unsatisfied liquid is less than 25% of the set amount, the electric inflation pump 4 stops working. When the liquid surface pressure value reaches the set pressure, the electric inflation pump 4 stops supplying air. And maintain the set pressure, when the liquid surface pressure value is adjusted within the range of ± 1%, the liquid bag surface pressure value is maintained, the ultrasonic flow sensor 6 detects the liquid flow value according to the diameter of the infusion tube 7, and sends the detection data to the PLC control The device 10 manually adjusts the liquid flow value and displays it to realize the intelligent management of the input liquid flow.

The PLC controller 10 issues instructions according to the set parameters digital program control part, and the electric inflation and exhaust pump 4 provides an air source to charge the airbag 1 with steam, and the liquid in the pressure bag 2 in the airbag 1 is subjected to the pressure conduction of the airbag 1 to generate pressure to realize The liquid input flow rate reaches the set value, and the pressure data detected by the pressure sensor 9 in the air bag 1 is fed back to the CPU digital program control unit of the PLC controller 10 to fine-tune the pressure in the air bag 1 to ensure a constant pressure in the air bag 1 and realize the stability of the liquid output flow rate sex.

In order to ensure the stability of the input flow rate of the liquid, it is the center of the device to control the pressure inside the air bag 1 to be constant. The data can be managed as a whole to meet the need for a large amount of fluid supplementation for patients in clinical operations and first aid.

In order to ensure the safety of the clinical use of the equipment, this device adopts the method of isolating the pressurized gas and the pressure bag 2, and only inflates the gas into the air bag 1 through the inflation and exhaust pipe 3 to realize the gas pressure delivery. The pressure data inside is sent to the PLC controller 10, and when the error of the pressure data is greater than 5%, the electric charge-exhaust pump 4 starts to ensure that the input flow of the liquid is stable and safe.

work process:

The PLC controller 10 powers up the self-test mode, detects the pressure sensor 9, the ultrasonic flow sensor 6, the liquid level sensor 8, the working status, and after the self-test passes, the user can set the required liquid flow rate, and set the maximum liquid flow rate value, set the maximum value of the inflation pressure of the airbag 1, and the CPU digital process control unit of the PLC controller 10 calculates the inflation pressure of the airbag 1 required by the liquid flow rate according to the set value, so as to realize the stability of the liquid flow rate and adjust the range within plus or minus 5%

According to 90% of the maximum value of the set flow rate, the pressure sensor 9 and the ultrasonic flow sensor 6 will feed back the detection signal and transmit it to the PLC controller 10. After calculation, the electric inflation and exhaust pump 4 will stop inflating and pressurizing the airbag 1, and automatically decompress it. 10% pressure, maintain a flow rate of 10% decompression, the liquid level sensor 8 detects that the liquid volume reaches the minimum value, the PLC controller 10 issues an instruction, and the electric inflation and exhaust pump 4 stops inflating the airbag 1 .

Immediately the air bag 1 gas is discharged and returned to the natural pressure of the atmosphere.

The pressure sensor 9 and the ultrasonic flow sensor 6 detect data exceeding ±10% of the set value, the liquid level sensor 8 detects a low liquid level, and the acousto-optic alarm unit of the PLC controller 10 is activated.

The present invention can set the minimum amount of liquid through the PLC controller 10, and if it is lower than the set limit value, an alarm will be given, and the nursing staff will replace it in time, without special supervision; the pressure of the pressure bag can be set through the PLC controller 10, if the pressure is insufficient It can be automatically inflated when inflated, without manual inflation by nursing staff; in emergency, the amount of liquid to be infused per unit time can be set through the PLC controller 10 to ensure accurate infusion per unit time; the volume of liquid can be set according to clinical needs by using digital technology The input rate per minute meets the needs of clinical operations. It can automatically control the flow rate of the input liquid and supply liquid to the patient at a constant rate. For gas pressure delivery, a pressure sensor 9 is installed in the airbag 1 to return the pressure data in the airbag 1, and the input flow rate is controlled by the PLC controller 10 to be stable and safe, realizing the intelligent management of the input liquid flow rate, and ensuring the use in clinical operations and emergency patients The patient needs a large amount of fluid supply during work; the structure is simple, the design is reasonable, and the practicability is strong.

The above description is only a preferred feasible embodiment of the present invention, and does not therefore limit the scope of rights of the present invention. All equivalent changes made by using the description of the present invention and the contents of the accompanying drawings are included in the scope of rights of the present invention. .

Claims (1)

1. An automatic pressurized infusion device, comprising a pressure bag, an inflation and exhaust pipe, and a pressure switch is arranged on the inflation and exhaust pipe, characterized in that: it also includes an air bag, a pressure sensor, a liquid level sensor, an ultrasonic flow sensor, an electric charging Exhaust pump and PLC controller, pressure bag and pressure sensor are respectively set in the air bag, the air bag is connected with the electric charge and exhaust pump through the charge and discharge pipe, the liquid level sensor is set in the pressure bag, and the ultrasonic flow sensor is set on the charge and discharge pipe , the pressure switch, pressure sensor, liquid level sensor, ultrasonic flow sensor, electric charge and exhaust pump are respectively electrically connected with the PLC controller.