Class 1 Flashcards
What is hydrotherapy?
Use of water in any of its three forms (solid, liquid, gas) as a temperature medium to achieve therapeutic effects
Temperature can be temperate, hot, or cold depending on the client’s health and…
Temperature can be temperate, hot, or cold depending on the client’s health and…
the therapeutic goals of prevention, treatment, or healing of injury
what are some examples of the use of water for treatment? (include: solid, liquid, and vapor states)
Solid: Ice packs, ice massage
Liquid: showers, baths, affusions, and heat packs
Vapor: inhalations and steam baths
what is cryotherapy?
refers to the use of cold
What is thermotherapy?
refers to the use of heat
List the 9 properties of water
- Specific heat
- Thermal conductivity
- hydrostatic pressure
- buoyancy
- resistance
- chemical properties
- Electrical properties
- Portability
- Latent Heat
What human body is made of approximately __% of water
70%
What is specific heat? Give example
Amount of heat that can be absorbed and stored in the different water states.
EX: Water can hold 2x as much heat than liquid paraffin & 4x more heat than air
What is Thermal conductivity? give Example
The capacity to conduct (transfer) heat to other substances or materials
EX. Solids have 100X more conductivity than liquids
Liquids have 100X more conductivity than gases
What is hydrostatic pressure?
The force of a liquid (water) exerts on the body. Hydrostatic pressure increases w/ water depth (think scuba diving)
A hydrostatic pressure in 15cm of water is equal to __.
A hydrostatic pressure in 15cm of water is equal to the pressure in the veins
What is buoyancy?
Ability to float
What is buoyancy dependent on?
Fat / lean muscle mass
Increased muscle mass = decrease buoyancy
Decreased muscle mass or increase adipose = more buoyancy
What is the Archimedes Principle of buoyancy?
A body immersed in liquid experiences an upward force equal to the weight of the displaced liquid
(so the weight of water displaced = same force from body)
What is water resistance?
Force of water to slow movements
In water, the resistance is ___ the resistance to air.
In water, the resistance is 12-34x the resistance to air.
What can water resistance be used for?
enhancing muscle strength and endurance
I.e. water aerobics
What is chemical properties of water?
Water = very effective solvent
Solvent is the ability to dissolve and hold within it many different substances
What is electrical properties of water?
Water is a good conductor of electricity
What is the portability of water?
Water can be easily stored, transported and converted from one state to another (ice,vapor,liquid)
What is latent heat?
energy required to change 1 state to another (solid to liquid, liquid to vapor)
How much energy is required to turn ice into water?
80Kcal
How much energy is required to turn water into vapor?
540Kcal
What is the safety hot temperature?
40degrees Celsius
What does hydrotherapy primarily effect? (3 parts of the body)
The skin
The circulatory system
The nervous system
The skin is the ______, making up approximately ___% of the total body weight.
The skin is the LARGEST ORGAN IN THE BODY, making up approximately 16% of the total body weight.
How thick is the skin on average?
0.5 - 4mm
What are the 3 layers of the skin
Epidermis
Dermis
Hypodermis
What is the purpose of the epidermis?
creates a barrier of protection for the skin
What does the epidermis contain / is made up of?
Keratinocytes (90%)
live cells in its deeper layers and dead cells at surface layers
What does the dermis contain?
collagen elastin fibers blood capillaries nerve endings sweat and oil glands hair follicles
How much thicker is the dermis compared to the epidermis?
100X
How does the dermis get its strength and elasticity?
collagen + elastin fibers
Where are nerve endings found and what is it important for?
dermis layer
important for sensation: touch, pressure, vibration, tickle, itch, pain, warmth, and cold
What does the hypodermis (subcutaneous) layer contain?
fat
blood vessels
nerve fibers
What does the nerve fibers do in the hypodermis layer?
conducts messages to and from the skin
What are the skin functions? (6)
- protection
- thermoregulation
- excretion
- absorption
- vitamin D synthesis
6, sensation
Describe how the skin provides protection? (5)
- acts as a barrier to foreign substances such as bacteria, viruses, fungi
- Melanin (brown pigment) protects the body from UV Rays
- Keratin (protein) toughens the skin, makes it more durable
- Cells in the skin release a fatty (lipid) substance that waterproofs the skin, preventing water loss and water entry
- Calluses (thickened skin) form to protect areas of friction
Describe how the skin acts as a thermoregulate the body
The dermis contains 8-10% of the body’s flow at rest :. allows skin to act as a blood reservoir
w/ heat: the blood vessels dilate, bringing the capillaries closer to to the body’s surface thus allowing the heat from in the blood to escape
w/cold: the blood vessels constrict, which will reduce the blood flow to the skin :. reduces heat loss
Sweat glands secrete water which creates heat loss through perspiration
What substances does the skin excrete?
small role in excretion of salt, CO2, ammonia, urea, some drugs + heavy metals
What types of substances does the skin absorb?
Absorbs soluble materials (Vit A, D, E, K),
industrial chemicals,
some minerals,
number of medication (birth control, nicotine patch, topical creams), and
herbal preparation and essential oils
How does the skin synthesize vitamin D?
skin exposure to the UV rays activates a molecule which is required to produce vit D
Describe how sensation is a function for the skin
skin contains the most receptors than any other organ
contains thermal receptors + mechanical receptors (which detects: light touch, change in pressure, fast, slow, vibrations, deep pressure, etc).
What is homeostasis?
condition of equilibrium in the body; the body responding to bring systems back into a functional balance
What is the core temperature of the body at?
37 degrees Celsius
The shell temperature (near the surface) is ___ cooler than the core temperature
The shell temperature (near the surface) is 1-6 DEGREES CELSIUS cooler than the core temperature
What temperature is the skin usually at?
28 - 32 degrees Celsius, but can be as low as 21 degrees Celsius if uncovered at room temperature
What are some effects of being too cold?
shivering, poor circulation, cold hands and feet, headaches, fatigue
What are some effects of not being able to cool down (excess heat)
heat stroke, headaches, hypertension, profuse sweating, electrolyte deficit
What is heat production proportional to?
the rate of metabolic function/reactions