Abstract: The electrical safety of medical equipment is of great significance. Medical institutions must ensure the electrical safety of medical equipment. The article introduces the basic concepts of medical electrical safety and the safety requirements of medical equipment electrical safety, and describes the safety protection measures for medical electrical equipment. It is necessary to do a good job in diagnosing electrical equipment, preventing micro-shocks, and setting up backup power. These measures can effectively prevent the occurrence of electrical safety problems of medical equipment and better protect the life and health of patients.
In medical institutions, medical devices are an essential configuration, and some medical devices and disease treatments require these medical devices. The safety of the electrical part of many medical devices is the guarantee of its normal operation. If there is a problem with the safety of electrical equipment, the operation of the whole equipment will be affected. Therefore, the electrical safety of medical equipment must be ensured to avoid safety accidents. At the same time, it is necessary to take protective measures for the common safety problems in medical equipment. If problems are found, effective measures can be taken to prevent and control them in time to prevent the expansion of safety accidents. The following is an analysis of the electrical safety issues and countermeasures of medical equipment:
1 Electrical safety issues of medical equipment
1.1 Concept of medical electrical safety
The electrical safety of medical equipment mainly refers to taking certain measures to avoid medical equipment problems caused by defects in medical equipment and other factors, and damage to the equipment operators or the equipment itself. Electrical safety mainly involves two aspects: one is personal safety; the other is equipment safety. These two are the main aspects of electrical safety, and we need to focus on the safety of these two aspects. Personal safety mainly refers to the safety problems that may occur during the operation of the equipment by the operator; equipment safety mainly refers to the safety problems that arise from the medical equipment caused by various reasons. The security problems in these two aspects will be caused by many reasons. When adopting the prevention and control measures for these two aspects, we should start from the aspects of technology and organization management. Both of them should be equalized so that the safety of medical equipment can be solved smoothly. The probability of medical electrical safety problems, so that medical equipment is always in a good state of operation.
1.2 Safety requirements for electrical safety of medical equipment
There are a variety of indicators and parameters that reflect electrical safety in medical devices, through which the electrical safety performance of medical devices can be judged. The general technical parameters reflecting the safety of medical equipment have grounding resistance, leakage current, power and dielectric strength. The grounding resistance mainly measures the resistance value between the unheated metal casing of the electrical equipment and the grid connection. This grounding cable is the protective grounding wire of the equipment and plays a role in ensuring the safety of the electrical equipment. If there is a bad grounding condition, when some of the electrical equipment's outer casing is not well insulated, people may encounter electric shock when they encounter the outer casing. If the insulation of the equipment casing is good and the grounding wire is in good contact with the earth, the human body is not prone to electric shock in this case, because the resistance of the human body is greater than the grounding resistance, which can effectively avoid the occurrence of electric shock accidents. Generally speaking, when grounding The smaller the resistance, the less likely people are to get an electric shock. Therefore, the grounding resistance of medical equipment should not exceed 0.2 ohms. Another safety parameter is leakage current, which has a serious impact on medical equipment and life safety. There are three kinds of conditions for human injury: first, burns, serious burns occur when current flows into the body and out of the body; second, muscle paralysis, when there is muscle paralysis, people will have a temporary respiratory arrest, if Excessive breathing time can pose a serious threat to human life safety. Third, the heart ventricular fibrillation caused by electric shock, which can cause dysfunction of the ventricle and heart valve, leading to blood circulation stop. The safety requirements for leakage current will vary according to the location where the equipment is used. For medical facilities, it can be divided into categories 0, 1 and 2, and different safety requirements are established in these medical places. The power is mainly used to detect the deviation between the actual output power of the medical electrical equipment and the set value of the equipment. The dielectric strength is mainly an indicator of electrical insulation, which can effectively reflect the insulation performance of medical equipment. The above are the parameters and safety requirements for electrical safety of medical equipment.
2 Safety measures for medical electrical equipment
2.1 Medical and diagnostic electrical equipment
Medical electrical equipment should be diagnosed frequently and problems found in medical electrical equipment should be discovered in a timely manner. For medical electrical equipment, certain measures should be taken according to the different functions used, and measures such as protective grounding, equipotential grounding, and functional grounding can be adopted. Taking these measures can effectively avoid the occurrence of some medical electrical equipment failures. If there are problems, we can take corresponding measures to prevent and cure them in time to avoid further harm. A power supply system commonly used in TN-S power supply systems in hospitals, which is often used when the low voltage system is TN type. In this power supply system, there are N lines and PE lines. These two lines are separately laid and insulated from each other. These two lines should pay more attention to the potential of the PE line to ensure that the potential is in a normal state. .
2.2 Do a good job of micro-shock prevention measures
Micro-electric shock is very easy to cause great harm to the human body, especially in key parts of the human body, such as medical electrical equipment close to the heart or directly inserted into the heart, the micro-shock prevention measures should be done well, if the deviation will cause huge damage to the human heart Injury can seriously endanger people's lives. The anti-micro-shock can be connected by equipotential grounding, and the power supply equipment can be powered by type II electrical equipment. Today's medical institutions do not allow power interruptions during certain surgical operations, such as interventional therapy, cardiovascular modeling, etc., these operations must be carried out to ensure the stability of the power supply, once interrupted, when it is turned on again, it will appear micro Electric shock, causing harm to the human body. In addition, patients may insert electronic instruments into the human body during certain treatments. In some cases, these electronic devices are prone to current leakage, which may cause micro-shocks to the human body. Micro-shocks are not easily detected, and sometimes it is prone to continuation of electric shock, which is extremely dangerous when approaching the heart. At present, the measures against micro-shock are generally to adopt equipotential bonding to prevent the patient from coming into contact with metal objects that may be charged. An equipotential bonding box can be placed on the wall, and the equipotential trunk in the box is connected with the equipotential bonding plate, etc., which can effectively Avoid the occurrence of micro electric shocks.
Bathroom Safety & Home Health Care
Elderly assistance armrest
It refers to the devices that are installed in corridors, bedrooms, bathrooms, bathrooms, staircases and balconies of the elderly care institutions and have continuity and specific functions to support the actions of the elderly. The disabled elderly should use the hand grip action to maintain their body balance or support their body. The assist handrail installed on the wall is generally divided into horizontal, vertical and inclined installation, and also divided into high, middle and low installation. It is a kind of assistive device suitable for aging environment.
Assist handrails are mainly used to install in elderly families, disabled families, elderly care institutions, disabled service institutions, medical institutions, hotels and other places to help the disabled elderly, disabled people and patients maintain physical balance.
TRUTECH CO., LTD. is an enterprise specializing in the research, development, production and sales of professional OTC products.The main products include shower chairs, armrests, toilet racks and toilet armrests, bedside armrests, elderly chairs and sofas, crutches and walking aids, knee pads, waist supports and other equipment.
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