Cold Stress Injuries, Potable Water, and Water Testing

Flashcards about cold stress injuries, potable water, and water testing, based on the provided lecture notes.

Cold Shock

Rapid loss of body heat due to increased sweat evaporation from wet skin and damp clothing.

Non-freezing Cold Injury

Localized injuries occurring above 32°F, associated with prolonged cold water or dampness exposure.

Trench Foot

A non-freezing cold injury of the feet with symptoms like coldness, numbness, and painful blisters.

Chilblain

Red or purple discoloration of distal extremity skin after cold exposure.

Frostbite

Tissue destruction due to environmental temperatures below freezing.

Hypothermia

General cooling of the body's core temperature.

Potable Water

Water treated and disinfected to be safe for drinking, as determined by Preventive Medicine personnel.

Ineffective iodine tablets

Iodine tablets that are completely yellow or brown and that stick together or crumble easily.

Household chlorine bleach

Chemical used for water disinfection when calcium hypochlorite is unavailable.

How to disinfect water by boiling

Using this method requires holding water at a rolling boil for 5 minutes at sea level to kill disease-producing organisms.

Non-Potable Water

Water from any untreated or treated source (including bottled water) that has not been tested and deemed safe by medical authority.

DPD (diethyl-p-phenylene diamine) Test

This test kit uses a comparator to directly read chlorine and bromine levels in water samples.

DPD No. 4 tablet

Tablet used to determine the total residual chlorine in water supplies using chloramines.