Six drawings down the left, six labels down the right, and a clock that never stops. Clear a tray and you win time back.
The tray. Every round deals six pairs. Tap a drawing on the left, then the label on the right that goes with it. The other order works just as well.
The clock. You begin with 120 seconds for five trays. A right pair costs nothing. A wrong pair costs four seconds. Clearing a whole tray gives ten seconds back.
Points. A pair is worth 300. Three in a row lifts the multiplier, and it climbs to three times. One slip drops it to one.
Reading a rhythm strip. The green line is the voltage trace on grid paper. A small bump before each spike is the P wave, the tall narrow spike is the QRS, and the broader bump after it is the T wave.
Reading a blood gas card. The shaded band on each scale is the normal range: pH 7.35 to 7.45, PaCO2 35 to 45 mmHg, HCO3 22 to 26 mEq/L. An arrow shows which way the value has moved.
Reading a lab card. Each row is one result. A red up arrow means high, a blue down arrow means low, and a gray dash means it sits in range.
Keyboard. Tab moves between cards and Enter or Space picks one. A short reason prints under the tray after every pair.