The document describes a tension pneumothorax emergency situation where a paramedic needs to perform a decompression procedure but is delayed due to the time required to gather and prepare individual supplies. It takes the paramedic 19 seconds to prepare for the procedure during which time the patient's condition could deteriorate. The document then introduces the L-PRV solution as a way to save valuable time by simplifying and streamlining the decompression procedure when treating a tension pneumothorax in the field.