Check for signs of life for no more than 10 seconds.
In the initial assessment, check for signs of life. During rescue breathing, check for signs of life every 2 minutes. During CPR, don't check for signs of life any more. Unless you see obvious signs of life once CPR is started, continue doing CPR.
Check for signs of life no more than 10 seconds.
In the initial assessment, check for signs of life. During rescue breathing, check for signs of life every 2 minutes. During CPR, don't check for signs of life any more. Unless you see obvious signs of life once CPR is started, continue doing CPR.
Analogue signals are more vulnerable to error than digital signals. See the related question "Why digital signals are more noise free than analogue signals?" for more details.
Go back to your teacher/lecturer/tutor and check the question.. My experience shows that it's the *opposite* way around.
To minimize the distortion of analog signals during transmission Because digital lines transmit signals more efficiently across distances than analog lines Because many telephone networks are moving over to digital interfaces
10 seconds.
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data signals
data signals
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Signs of life check after the initial check for an adult has been eliminated. Once you start CPR on an adult, do not stop unless advanced medical takes over, an AED is available to hook up, the scene becomes unsafe and you need to move yourself and the patient, or the patient shows signs of life during the CPR process.