The Mosquito Arterial Blood Gas Sampler has a proprietary anaerobic, fixed-volume design that virtually eliminates the potential for pre-analytical sampling errors. The 500 micro liter sampler ensures a fixed sampling size every time with no plunger to set, no tapping required and no filter needed to expel air bubbles. The unique dual lumen collection device has an easy-to-grip, external barrel, similar in diameter to the familiar 3-mL syringe. An innovative inner collection lumen that is ideal for micro sampling is compatible with today’s analyzers. Arterial pressure fills the sampler rapidly, so flash back and fill time occur almost simultaneously. Plus the special balanced Lithium/Zinc heparin formulation results in no CO2 dilutional errors. Mosquito samplers are available needleless for in-line applications or with smaller 23 or 25 gauge needles that enhance patient comfort by reducing the potential for trauma to the artery.