An infusion pump is a medical instrument that can accurately and continuously control the infusion rate and volume to ensure that the drug enters the patient's body safely. In ICU wards, the performance requirements of infusion pumps used in critically ill patients are more stringent. It is required that its infusion equipment must be able to finely control the drug delivery rate, even only a few milliliters of drugs per hour, and can simultaneously infuse several different drugs. This puts forward higher requirements for the performance of critical ICU infusion pumps.

A medical monitor is a medical device that monitors the physiological data of patients, typically consisting of multiple sensors and a display screen. As a precision medical instrument, medical monitors can continuously monitor the physiological data of patients and compare them with known settings, helping medical staff detect changes in the condition in a timely manner and take corresponding treatment measures.

A defibrillator (AED) is a portable medical device that can control a certain amount of electrical current through the heart in the event of cardiac arrest, eliminating certain arrhythmias, helping patients recover their heartbeat, and winning valuable rescue time for patients. At present, defibrillators are widely equipped in various public places.

A filter is a filter circuit composed of capacitors, inductors and resistors. It can only allow signals of specific frequencies to pass through or filter unwanted frequency signals to solve the problem of signal interference between different frequency bands and communication systems. In medical equipment, the interference of electromagnetic wave to equipment signal will directly affect the reliability of doctors' diagnosis results, and even endanger the life safety of patients. Therefore, large medical devices generally need to use medical filters to suppress electromagnetic interference and ensure that medical devices are always in accurate, safe and good working conditions.

A hearing aid is a small amplifier that can amplify external sounds, helping hearing-impaired individuals improve their auditory experience and enhance their quality of life. A rechargeable hearing aid refers to a hearing aid that can be repeatedly charged and used by the battery. The metal copper pillar of the hearing aid can be charged by contacting the probe connector of the charging dock. Users do not need to frequently replace the battery of hearing aids, making it more convenient to use.