603622 is the first ventilator that has been accredited with CE certificate in China. It has also passed a series of rigorous tests organized by competent Chinese organizations, which testify to its reliable functions under various kinds of unfavorable circumstances. The internal battery with at least four hours’ working time and the rack of multiple uses facilitate transportation and emergent treatment. The ventilation modes it has include A/C, SIGH, SIMV, SPONT and Manual. The data displayed include tidal volume, minute volume, total breath rate, peak pressure and pressure-time waveform. Intelligent apnea backup ventilation technique is also adopted in this machine.