A MANUAL VENTILATION OR RESUSCITATION DEVICE (100) IS PROVIDED. THE BODY (110) OF THE DEVICE (100) HAS RIGID PANELS (140A, 140A’, 140B, 140B’, 140C, 140D, 140D’, 140D”, 140D’”, 140E, 140E’, 140E”, 140E’”, 140F, 140F’, 140F”, 140F’”, 140G, 140G’, 140G”, 140G’”, 140H, 140H’, 140H”, 140H’”) THAT ENCOMPASS A SEALED VOLUME AND ARE MOVABLE WITH RESPECT TO EACH OTHER. THE BODY (110) HAS A DISPLACEMENT IN A DIRECTION OF A HAND DISPLACEMENT AND AT LEAST ONE OTHER DIRECTION. A SIZE ADJUSTER ADJUSTS THE BODY DISPLACEMENT(S) BETWEEN THE STATES. A FREQUENCY ADJUSTER (900) ADJUSTS THE TIME TO RESTORE THE VOLUME OR TO ADJUST THE TIME TO COMPRESS THE VOLUME. THE BODY (110) PROVIDES AN ERGONOMIC FIT TO A USERS HAND, WHICH REDUCES FATIGUE. THE VOLUME AND/OR FREQUENCY ADJUSTMENTS PROVIDE A USER WITH RELIANCE ON A MORE OR LESS CONSTANT TIDAL VOLUME AND TIDAL RATE. SUCH ADJUSTMENTS ALLOW USAGE OF THE DEVICE ON ANY PATIENT, REGARDLESS OF INDIVIDUAL FACTORS SUCH AS PHYSICAL CONDITION, BODY/LUNG SIZE, AGE AND SEX. MULTIPLE DEVICES (100) COULD EASILY BE STACKED OR NESTED WITH EACH OTHER, WHICH REDUCES STORAGE SPACE.
