STEP 3: PRESS THE SHOCK BUTTON
As soon as the OnSite detects that the pads are attached to the patient, it begins analyzing the patient’s heart rhythm. It tells you that no one should be touching the
patient, and the Caution light
begins flashing as a reminder.
If a shock is needed:
The Caution light
goes from flashing to solid, the orange Shock button 
starts flashing, and the OnSite tells you to press the flashing orange button. Before you press the button, make sure no one is touching the patient. When you press the Shock button, the OnSite tells you that the shock has been delivered. Then the OnSite tells you it is safe to touch the patient, instructs you to begin CPR, and
invites you to press the flashing blue 
for CPR Coaching if desired.
If a shock is not needed:
The OnSite tells you it is safe to touch the patient and instructs you to perform CPR if needed. (If CPR is not needed – for example, if the patient is moving or regaining consciousness – follow your local protocol until emergency medical personnel arrive.) Then the OnSite invites you to press the flashing blue 
for CPR Coaching, if desired.
For CPR Coaching:
Press the flashing blue 
during the first 30 seconds of the patient care pause to activate CPR Coaching.* (If the Infant/Child SMART Pads Cartridge is inserted, CPR Coaching will provide coaching for infant/child CPR.) When the pause is over, the OnSite tells you to stop CPR, so it can analyze the patient’s heart rhythm. The motion caused by CPR can interfere with analysis, so be sure to stop all motion when instructed.
*The default configuration for the OnSite provides CPR Coaching when you press the i- button in this situation; however, the default setting can be revised by your Medical Director using Philips software available separately. See Appendix F for more information.