Trauma - Wk11 - Diving Conditions

_______ _______- expresses the relationship between the volume and pressure of gas.

(constanttemperaturere)

Volume of gas increases = pressure decreases

[If a diver was to go from the surface (1ATA) down to 10m (2 ATA), then the volume of gas would reduce; lungs shrink; due to the increased pressure]

• Boyle's Law

• Charles Law

• General Gas Law

• Daltons's Law

• Henry's Law

Answer explanation

Gas Laws:

__________ _______

Volume of gas is proportional to the absolute temperature (higher temp = higher volume); when pressure is constant.

• Boyle's Law

• Charles Law

• General Gas Law

• Daltons's Law

• Henry's Law

Answer explanation

Gas Laws:

__________ _______

The total pressure exerted by a MIXTURE of gases is the SUM of the PARTIAL pressure that would be exerted by EACH of the gases if it ALONE occupied the total volume.

21% O2, 78% N2 (each gas acts independently of the other.

1ATA= 0.2ATA O2 & 0.8ATA Nitrogen

@ sea level 760mmHg = 160mmHg O2, 600mmHg Nitrogen

• Boyle's Law

• Charles Law

• General Gas Law

• Daltons's Law

• Henry's Law

Answer explanation

Gas Laws:

__________ _______

At a constant temperature, the amount of gas that will dissolve in liquid is proportional to the partial pressure of the gas over the liquid.

(double the partial pressure of a gas and you double the number of molecules dissolved in a liquid)

 

Related most closely to decompression illness - think of champagne and bubble formation when ambient pressure changes.

 

High altitude lake, less oxygen will be dissolved and available in the water for the fish to consume

• Boyle's Law

• Charles Law

• General Gas Law

• Daltons's Law

• Henry's Law

Gas Laws:

__________ _______

Boyle's and Charle's Law combined

P1V1/T2 = P2V2/T2

• Boyle's Law

• Charles Law

• General Gas Law

• Daltons's Law

• Henry's Law

Answer explanation

P1 = initial pressure

V1 = initial volume

T1 = initial temperature

2 not initial

Tissue Half Times

• Half-time is constant regardless of ambient pressure

• different tissues absorb and release different gases at different rates (slow and fast tissues)

• is the time that it takes a gas to half saturate a tissue.

Tissue Half Times (nitrogen)

Correct order of fastest tissue to slowest tissue

Fast

^

Slow

• Spinal Cord

  Skin, Muscle

  Inner Ear

  Joints, Bones

• Joints, Bones

  Inner Eear

  Skin, Muscle

  Spinal Cord

• Inner Ear

  Spinal Cord

  Joints, Bones

  Skin, Muscle

• Spinal Cord,

  Joints, Bones

  Skin, Muscle

  Inner Ear

TRUE/FALSE

The bends in diving, basically means there is an accumulation of bubbles in places where it shouldn't be. Causing some sort of imbalance/Injury

• TRUE

• FALSE

Barotrauma

"tissue damage resulting from the expansion or contracting of enclosed has spaces, due to changes in volume"

Which Law can directly cause this?

• Boyle's Law

• Dalton's Law

• Henry's Law

Barotrauma: Boyle's Law

Compressible or Non-Compressible Compartment

.

Middle Ear Spaces

Sinuses

Lungs

Bowel Lumen

• Compressible

• Non-compressible