The reasons for replacing the endoscope air and water injection button are as follows:
1. Damage or malfunction: The button is damaged or malfunctions during use, resulting in inability to operate normally. If the button doesn't press or release properly, or doesn't respond, it needs to be replaced.
2. Wear or aging: Long-term use will cause the buttons to wear or age, making their functions no longer reliable. Buttons also need to be replaced if they feel loose, sticky, or have lost their elasticity.
3. Repair or upgrade: Sometimes, in order to maintain the performance of endoscopic equipment, some buttons need to be replaced for repair or upgrade. This is due to the need for technology updates, improvements or the emergence of new features. An endoscope is a medical device used to examine and observe the body's internal cavities or organs.