Go to the place (or institution; such as ARC or AHA) where you received your certifications and inquire; if your cards have not been expired for long, you may be able to take the refresher class instead of the full class.
In most cases, you must take Standard First Aid with CPR Level C before you can take an Advance First Aid or Advance Medical First Responder course. I personally have taken Standard First Aid with CPR Level HCP because I intend to take Advance First Aid later.
The volume of HCP is 8*pi*r^3 or 25.13*r^3
A CPR Course is a course that is offered by many Non-For-Profit companies such as Red Cross Canada and St. John's Ambulance. The course will teach you how to perform CPR on an unconscious person. There are three main levels of CPR. Level A, Level C, and Level HCP.Level A: Emergency First AidLevel C: Standard First AidLevel HCP: Health Care Provider
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HCP is similar to AIP, but the symptoms are typically milder. People with HCP may have some skin sensitivity to sunlight, however, extensive damage to the skin is rarely seen.
As far as current Canadian Red Cross training goes, the CPR for HCP does not cover first aid.It does cover topics such as shock & deadly bleeding, stroke, angina & heart attack (as well as CPR, AED, choking) but is not considered enough to be a first aid course.Typically the first aid course covers more. See the related link for a breakdown of the various courses or check your local training provider.
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http://nathas.com/crystal.htm
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