1. Spray uniformity: Observe whether the droplets sprayed by the spray are evenly distributed. If the droplets are of different sizes and unevenly distributed, it may affect the absorption and effect of the drug.
2. Droplet size: The appropriate droplet size is important for different treatment sites and diseases. Generally, the thickness of the droplets can be observed by the naked eye, or the designed droplet size range can be understood by referring to the product instructions.
3. Spray range and angle: Check whether the distance that the spray can reach and the coverage angle of the spray meet the use requirements. For example, for wound spray, a certain range and a larger coverage angle are required.
4. Spray stability: When spraying continuously, observe whether the intensity and quality of the spray are stable, and there should be no intermittent or intermittent situations.
5. Drug residue: After use, check the amount of liquid medicine left in the sprayer. If there is too much residue, it may mean that the utilization rate of the sprayer is not high, affecting the treatment effect.
6. Patient feelings: The subjective feelings of the user are also very important. If you feel uncomfortable during use, such as irritation, choking, etc., it may indicate that the spray effect is not good.
