Surgery – Respiratory method or device – Means for supplying respiratory gas under positive pressure
Reexamination Certificate
2006-05-09
2006-05-09
Dawson, Glenn K. (Department: 3731)
Surgery
Respiratory method or device
Means for supplying respiratory gas under positive pressure
C128S205230, C128S205250
Reexamination Certificate
active
07040319
ABSTRACT:
Method and apparatus are disclosed for monitoring an oxygen partial pressure in an air mask and providing a tactile warning to the user. The oxygen partial pressure in the air mask is detected using an electrochemical sensor, the output signal from which is provided to a comparator. The comparator compares the output signal with a preset reference value or range of values representing acceptable oxygen partial pressures. If the output signal is different than the reference value or outside the range of values, the air mask is vibrated by a vibrating motor to alert the user to a potentially hypoxic condition.
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Kelly Mark E.
Pettit Donald R.
Cate James M.
Dawson Glenn K.
Hammerle Kurt G.
Mendoza Michael
Ro Theodore U.
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