The Pulmonary Resection Bellows is a compact, accordion-framed pneumatic device designed to maintain respiratory function in patients whose pulmonary musculature has been compromised by trauma, toxin exposure, or combat-grade neurotoxic agents. It attaches via a sealed oral-nasal interface and a pair of intercostal anchor clips, mechanically driving inhalation and exhalation cycles calibrated to the patient's blood-oxygen readout through a small embedded biosensor. In field conditions, it can sustain a flatlined respiratory system for up to six hours without recharge.

What distinguishes the Bellows from earlier mechanical ventilators is its adaptive rhythm engine — a low-power analogue processor that modulates breath cadence in response to detected movement, ambient noise, and patient heart rate variability. This means a downed operative being carried through a firefight won't asphyxiate due to positional changes or jostling. The device also features a one-way toxin filter membrane rated for most aerosolized chemical agents found in GLMZ's contested industrial zones.

The Bellows is standard-issue in Helix Biosystems extraction teams and has found a devoted secondary market among deep-sewer runners and tunnel-breach specialists who work in environments with chronically compromised air quality. Street medics refer to it as 'The Deacon' — something that keeps you breathing when you have no business doing so.