# Flight Medic

 Boyle's Law When T is constant the V is inversely proportional to the P Charles's Law When P is constant the V is proportional to the T-Test Tip: Charles -> Centigrade Gay-Lussac's Law When V is constant the P is proportional to T Dalton's Law The total P of a gas mixture is the sum of the individual or partial pressures of all gases in the mixture Henry's Law -solubility of a gas in a liquid at a particular temperature is proportional to the pressure of that gas above the liquid.-causes bends in scuba diving during ascent. Test Tip: Henry->Heineken Grahm's Law -gases go from a higher P or concentration to a region of lower P or concentration.-example is simple diffusion Hypoxia -decrease in tissue oxygen or an oxygen supply inadequate to meet tissue needs Hypoxemia -a decrease in arterial blood oxygen tension Hypercapnia -an increased amount of CO2 in blood Four stages of hypoxia 1) indifferent stage2) compensatory stage3) disturbance stage4) critical stage Indifferent stage Sea level-10,000 ft-in this stage the body reacts with increased heart rate and ventilation Night vision loss occurs at 5000 ft Compensatory Stage 10,000-15,000 ft-increased B/P, heart rate,depth and rate of respiration.-efficency and performance of tasks requiring mental alertness becomes impaired Disturbance Stage 15,000-20,000 ft-characterized by dizziness, sleepiness, tunnel vision, and cyanosis-thinking becomes slow and muscle coordination decreases Critical Stage 20,000-30,000 ft-marked mental confusion and incapacitation followed by unconsciousness usually within a few minutes Hypoxic Hypoxia -deficency in alveolar oxygen exchange Hypemic Hypoxia -reduction in the oxygen carrying capacity of the blood Stagnant Hypoxia -occurs when conditions exist that result in the reduced total cardiac output Hystolic Hypoxia -occurs when metabolic disorders or poisoning of the cytochrome oxidase enzyme system results in the cells inability to use molecular oxygen Temp change with altitude Climb 100m=drop 10C Value of "One standard atmosphere" -760 torr-14.7 psi-101.3 kPa Calculation of FiO2 at different Barometric Pressures (PB1 x FiO21) / PB2 = FiO22-where PB is the barometric pressure MSL -mean sea level refers to elevation above sea level AGL -above ground level refers to elevation above ground directly below aircraft Emergency locator transmitter "ELT" frequency 121.5 Hz Effective PerformanceTime -the amount of time you are able to perform useful flying duties in an environment of inadequate O2 Time of Useful Consciousness refers to the amount of time from the point of exposure to an oxygen-deficient environment to the point deliberate function is lost Barotitis Media -refered to as ear block resulrs from failure of the middle ear space to ventilate when going from low to high pressure-Descent Barosinusitis -sinus block caused by acute or chronic inflammation-Ascent Barodontalgia -toothache caused by exposure to changing barometric pressures-Ascent Barobariatrauma -caused by a large/sudden release of nitrogen from adipose tissue of the body upon decompression-replace the nitrogen with oxygen-Test tip: Barobariatrauma -> Pre-oxygenate first Authorkkfuller ID30689 Card SetFlight Medic DescriptionFlight Medic Air Physiology Updated2010-08-21T21:28:32Z Show Answers