according to this embodiment lumen 370 is configured to remain at a static pressure during normal operation of the system however once depressed button 366 pneumatically creates a pressure signal in lumen 370 pressure sensor 372 then measures the pressure signal and or change in pressure in lumen 370 this information may then be sent to and processed by microprocessor 307 which toggles e g stops restarts delays etc operation of the blood pressure system since microprocessor 307 may be configured to identify a pressure change in lumen 370 the orientation of the system e g position and attachment of hoses lumens sensors cuffs etc can vary accordingly pneumatic switch 350 allows a caregiver to remain near a patient during a blood pressure determination and still control the overall operation of the system 0032 fig8 9 show detailed exemplary cross sectional views of the interior of switch 350 from fig7 specifically fig8 shows switch 350 while button 366 is in an extended position and fig9 shows switch 350 while button 366 is in a compressed position as shown in fig8 and 9 pressurized air may travel through switch 350 along two separate paths first air may travel between lumens 354 and 362 by way of path 402 second air may travel between lumens 356 and 364 by way of path 404 in addition air may be held at a substantially static pressure within lumen 370 lumen 370 is preferably pneumatically isolated from paths 402 404 e g lumen 370 exists as part of a closed system accordingly a pressure signal from the activation of button 366 would only exist in lumen 370 referring to fig8 button 366 may be configured to move between an extended position and a compressed position through an aperture 332 located on.