What is a patent foramen ovale (PFO)? In about 25% to 33% of people (that is, one in three to four individuals), the foramen ovale tissue flap does not close completely. When the foramen ovale remains open, it is called a â patent foramen ovaleâ or PFO. A PFO can allow a small amount of blood to pass from the right side of the heart to the left side
the minimum necessary standard is intended to be consistent with and not override professional judgment and standards and that practices must implement policies and procedures based on their own assessment of what phi is reasonably necessary for a particular purpose
Requirements are totally abstract things. A requirement is simply something that somebody requires. The Oxford English Dictionary defines a requirement as an order, a demand, an imperative. In the most common engineering context, a requirement is a required characteristic of something that is to be engineered or otherwise acquired. If a requirement is written down, it is now a specified requirement. A specification is a specific record. In the two most common engineering contexts, we have requirements specifications and design specifications. The first is a specific record of a set of requirements; the second is a specific record of a design.