What is the difference between Microshock and Macroshock?
Macro-shock occurs when current passes through the body via contact with the skin and this aspect applies to all types of electrical safety. Micro-shocks occur when invasive patient connections are placed across or in close proximity to myocardial tissue and nerves and blood components have relatively low resistance.
What characteristic of power systems in the operating room is intended to reduce the chance of Microshock?
An intact equipment ground wire provides a low-resistance pathway for leakage current and constitutes the major source of protection against microshock in electrically susceptible patients.
What is microshock pacemaker?
Microshock refers to the risk that patients undergoing medical procedures involving externally protruding intracardiac electrical conductors, such as external pacemaker electrodes, or saline filled catheters, could suffer an electric shock causing ventricular fibrillation (VF) due to currents entering the body via …
What do you understand by microshock?
What can cause microshock?
A major cause of microshock is a leakage current, i.e. a small current passing between circuits or to earth because of incomplete insulation and which would normally be harmless via surface contact. Such currents may flow in the equipment casing and in earth and patient connections.
What causes Macroshock?
Possible sources of macroshock include: poorly designed or malfunctioning electrophysiology equipment, Lightning, damaged power cords or other electrical hazards around the household, downed power lines, high-voltage electrical equipment such as transformer stations and other industrial electrical equipment, and …
What causes Microshock?
How does it feel being electrocuted?
Our body conducts electricity so when you get an electric shock, electricity will flow through your body without any obstruction. A minor shock may feel like a tingling sensation which would go away in some time. Or it may cause you to jump away from the source of the current.
How are micro and macro shock hazards related?
In the case of micro current shock, the current passes directly through the heart wall. Gross shock is experienced by the person by an accidental contact with the electrical wiring at any point on the surface of the body. Macro shock hazards are usually caused by electrical wiring failures.
When does a macroshock occur in a microshock?
Macroshock/Microshock A macroshock situation is when current is applied to tissue far from the organ of interest, usually the heart. The current is then spread out more or less uniformly, and rather large currents are needed in the external circuit (usually quoted >50 mA at 50/60 Hz) to attain dangerous levels, Figure 10.34.
How is micro current shock different from gross current shock?
In the case of micro current shock, the current passes directly through the heart wall. Gross shock is experienced by the person by an accidental contact with the electrical wiring at any point on the surface of the body.
Why is it important to avoid grounding the patient in a macroshock?
In many macroshock situations, an individual is connected to the hot wire and touches the ground at the same time. This is why it is important to avoid grounding the patient (e.g., by preventing the patient from touching any metal equipment that is grounded).