It is preferable that both tests were performed by the same operator. c If there is no history that allows us to state that the window is permeable to ultrasound, we cannot confirm nor rule out anything with respect to the flow at that particular vessel.
Es preferible que ambos exámenes hayan sido realizados por el mismo operador; c Si no hay antecedentes que nos permitan afirmar que la ventana es permeable al ultrasonido, no se puede afirmar ni descartar nada en relación al flujo en ese determinado vaso.