Blood gas analyzers measure gases dissolved in the blood, such as oxygen and carbon dioxide. Such information is vital when caring for patients with critical illnesses or respiratory infections, such as COVID-19. These analyzers rely on various disposable cartridges to process blood samples. Millions of these cartridges must be assembled each year.
A blood gas analyzer works by pumping a blood sample through a measurement cartridge, which has multiple sensors to measure pH and the partial pressures of oxygen and carbon dioxide. The bicarbonate concentration is also calculated. Many blood-gas analyzers will also report concentrations of lactate, hemoglobin, several electrolytes, oxyhemoglobin, carboxyhemoglobin, and methemoglobin. These results are usually available for interpretation within five minutes.