The algorithm of micropump speed is pump speed = required drug dose × 0.06 × body weight × number of syringes in milliliters ÷ drug dose.
1. Calculation formula based on flow rate
The infusion volume of the micropump = flow coefficient Q (ul/min) × infusion time t (min).
2. Calculation formula based on rotation speed
The infusion volume of the micropump = rotation angular speed × radius of the micropump mechanical handle r (mm) × infusion time t (min).
3. Voltage-based calculation formula
The infusion volume of the micropump = infusion time t (min) × single pulse voltage V (V) × single voltage pulse time t (s )/voltage pulse interval t(s).
4. Calculation precautions
Based on the formula for flow calculation, the flow coefficient Q must be obtained by looking up the table first. It generally refers to how many unit volumes of liquid can be infused per minute. Some The micro-pump will have different flow indications depending on the set rotation angular speed, so actual measurement is required to determine the flow coefficient.
Based on the formula of rotation angular velocity, the radius r of the mechanical handle of the micropump is required to be determined, that is, the user cannot change it, and can be found out from the equipment instructions; while the rotation angular velocity can be adjusted according to actual usage. Different angular velocities will produce different infusion volumes.
The voltage-based formula requires that the single pulse voltage V is determined, which can be found in the equipment instructions; the single voltage pulse time t and voltage pulse interval t are also determined and can be adjusted according to actual usage. .
Precautions for using the micropump:
1. Do not touch it
Do not touch the micropump at will to avoid loosening of the instrument to avoid drug waste or extravasation. . When the patient needs to go to the toilet or move around, it is necessary to try to avoid excessive impact on the tubes or micropump. When drug extravasation or unknown cause alarm is found in the micropump, medical personnel should be called promptly for treatment.
2. Pay attention to safety
Microsyringe pumps are usually powered by electricity. Whether it is an external power supply or a built-in battery, you must pay attention to safety when using the micropump. Do not place too many debris near the power supply, especially water cups, kettles, etc. to avoid the risk of electric shock.
3. The pipeline is unobstructed
During the operation, it is necessary to ensure that the pipeline is unobstructed and cannot be folded or pressurized. The entire set of infusion lines should be exposed as much as possible for inspection. If it is found that the infusion line is blocked and the medicine does not flow smoothly, medical staff should be called in time for treatment.
4. Close observation
When operating the micropump, changes in the patient's condition should be observed at all times. If a patient suffers from sudden disturbances of consciousness, abnormal physical signs, or other abnormal conditions, he or she should call medical staff for immediate treatment.