DMT ALREADY PASSED
Pressure is defined as: - =Force (weight) per unit area
Another name for water pressure is: - =Gauge pressure as this is the pressure read on a depth gauge
Water density (weight per unit) varies with: - =Temperature, Salinity, and depth
From a diving point of view, the human body can be thought to be composed of three materials: -
=Water, Bone, Air
Convert Fahrenheit to Rankine - =460+F= Rankine (R)
Convert Celsius to Kelvin - =273+C= Kelvin (K)
Equation for Boyle's Law - =P1 V1=P2 V2
Define Charles Law - =The volume of a given mass of an ideal gas varies directly with the absolute
temperature
Equation for Charles' Law - =V1/T1=V2/T2
Boyle's and Charles laws can be combined into a single equation which is: - =The general gas law
Define Dalton's Law - =In a mixture of gases, the pressure exerted by one of the gases is the same as it
would exert if it alone occupied the same volume
SEV - =Surface equivalent
Surface Equivalent % - =PP at depth (ATAx100/1.0 ATA)
,Buoyancy - =Archimedes principle
Factors affecting an objects buoyancy include - =Specific gravity of the water
Specific gravity of the diver
Lung volume
Compression of wet suit at depth
Empty SCUBA bottles increase buoyancy at end of dive
Volume of air in dry suit
Light in Water - =Refractive index makes objects appear 25% larger and closer
Vision without a lens results in hyperopia of 40 deopters
Reflection in the water causes tunnel vision
Fraction of light by water causes diminished light within
Everything is blurred underwater unless there is and air to cornea interface
The external ear is divided into 2 main parts: - =These are the Auricle and the or meatus
The main problem occurring with the external ear: - =External otitis
The tympanic membrane is made up of three layers: - =Skin, fibrous membrane, and mucous membrane
The structure most often damaged by barotrauma - =The tympanic membrane
Name of bones in the middle ear - =The ossicles
Three small bones of the inner ear - =Malleus, incus, stapes
, What do the three small bones of the inner ear do - =They serve to transmit sound vibrations from the
tympanic Membrane to the inner ear
The Eustachian tube - =connects the middle ear with the nasopharynx and allows passage of air
Make up of the inner ear - =Membranous filled sac encased within the temporal bone of the skull, within
the structure lie the special sense organs for hearing, equilibrium, and for position of head
Three organs of inner ear - =Cochlea, vestibula, and three semicircular canals
The cochlea - =The organ for hearing and consists of a system of coiled tubes
The vestibula - =Sensory organ that detects sensations concerned with equilibrium
The membrane labyrinth - =Contain hair cells which connect at their base with the branches of the
vestibular division of cranial nerve eight
The 3 ways of hearing - =Air & Bone, Air only, Bone only
Perilymph - =fluid contained in the labyrinth of the inner ear
Greatest number of diving medical problems is often seen in the - =Shallowest part of a dive
Barotruama - =Damage done to tissues when there is a change in ambient pressure
Four essential components that must be present for barotrauma to occur - =Gas filled space, rigid walls,
enclosed, Change in ambient pressure
Barotrauma on descent is usually called - =A squeeze
Pressure is defined as: - =Force (weight) per unit area
Another name for water pressure is: - =Gauge pressure as this is the pressure read on a depth gauge
Water density (weight per unit) varies with: - =Temperature, Salinity, and depth
From a diving point of view, the human body can be thought to be composed of three materials: -
=Water, Bone, Air
Convert Fahrenheit to Rankine - =460+F= Rankine (R)
Convert Celsius to Kelvin - =273+C= Kelvin (K)
Equation for Boyle's Law - =P1 V1=P2 V2
Define Charles Law - =The volume of a given mass of an ideal gas varies directly with the absolute
temperature
Equation for Charles' Law - =V1/T1=V2/T2
Boyle's and Charles laws can be combined into a single equation which is: - =The general gas law
Define Dalton's Law - =In a mixture of gases, the pressure exerted by one of the gases is the same as it
would exert if it alone occupied the same volume
SEV - =Surface equivalent
Surface Equivalent % - =PP at depth (ATAx100/1.0 ATA)
,Buoyancy - =Archimedes principle
Factors affecting an objects buoyancy include - =Specific gravity of the water
Specific gravity of the diver
Lung volume
Compression of wet suit at depth
Empty SCUBA bottles increase buoyancy at end of dive
Volume of air in dry suit
Light in Water - =Refractive index makes objects appear 25% larger and closer
Vision without a lens results in hyperopia of 40 deopters
Reflection in the water causes tunnel vision
Fraction of light by water causes diminished light within
Everything is blurred underwater unless there is and air to cornea interface
The external ear is divided into 2 main parts: - =These are the Auricle and the or meatus
The main problem occurring with the external ear: - =External otitis
The tympanic membrane is made up of three layers: - =Skin, fibrous membrane, and mucous membrane
The structure most often damaged by barotrauma - =The tympanic membrane
Name of bones in the middle ear - =The ossicles
Three small bones of the inner ear - =Malleus, incus, stapes
, What do the three small bones of the inner ear do - =They serve to transmit sound vibrations from the
tympanic Membrane to the inner ear
The Eustachian tube - =connects the middle ear with the nasopharynx and allows passage of air
Make up of the inner ear - =Membranous filled sac encased within the temporal bone of the skull, within
the structure lie the special sense organs for hearing, equilibrium, and for position of head
Three organs of inner ear - =Cochlea, vestibula, and three semicircular canals
The cochlea - =The organ for hearing and consists of a system of coiled tubes
The vestibula - =Sensory organ that detects sensations concerned with equilibrium
The membrane labyrinth - =Contain hair cells which connect at their base with the branches of the
vestibular division of cranial nerve eight
The 3 ways of hearing - =Air & Bone, Air only, Bone only
Perilymph - =fluid contained in the labyrinth of the inner ear
Greatest number of diving medical problems is often seen in the - =Shallowest part of a dive
Barotruama - =Damage done to tissues when there is a change in ambient pressure
Four essential components that must be present for barotrauma to occur - =Gas filled space, rigid walls,
enclosed, Change in ambient pressure
Barotrauma on descent is usually called - =A squeeze
