8/26/2014 1 Hydrotherapy Aquatics and Whirlpools History of Hydrotherapy Usage • One of the oldest forms of heat application • Initially used for relaxation History of Hydrotherapy • “ordinary containers are not as therapeutic as clinical containers such as whirlpools and Hubbard Tanks with agitating turbines”
20
Embed
Hydrotherapy - MCCCbehrensb/documents/Hydro14.pdf · Hydrotherapy Aquatics and Whirlpools ... Aquatic Therapy Equipment ... Hubbard Tank –Fixed –Whole body immersion
This document is posted to help you gain knowledge. Please leave a comment to let me know what you think about it! Share it to your friends and learn new things together.
Transcript
8/26/2014
1
Hydrotherapy
Aquatics and Whirlpools
History of Hydrotherapy Usage
• One of the oldest forms of heat application
• Initially used for relaxation
History of Hydrotherapy
• “ordinary containers are not as therapeutic as clinical containers such as whirlpools and Hubbard Tanks with agitating turbines”
8/26/2014
2
Physical Principles of Water
• Archemede’s Principle (buoyancy)
– A body which is fully or partially immersed in a liquid experiences an upward thrust equal to the weight of the liquid it displaces
• check this out…
Physical Principles of Water
• Buoyancy
– The quality of being able to float, as on water
– The upward force exerted upon an immersed or floating body by a liquid
Physical Principles of Water
• Buoyancy
– The upward thrust acting in the opposite direction to the force of gravity
• Exerts a stronger upward thrust as the submerged part nears the
• Relative Density is equal to the ratio of the mass of a given volume of a substance to the mass of the same volume of water
– a.k.a. Specific Gravity
The weight density of a material is the weight of a given volume unit of the material divided by that volume unit. An example is that a 1 cubic foot volume of water weighs
62.4 pounds. The density of water is then 62.4 pounds per cubic foot.
Physical Principles of Water
• Relative Density
– with the lungs fully inflated
• The relative density of the human body is between 0.95 and
0.974
– A body with a relative density less than one will float
Physical Principles of Water
• Relative Density
– without the lungs fully inflated
• The relative density of the human body is between 1.050 and 1.084
8/26/2014
5
Physical Principles of Water
– A body with a relative density greater than one will sink
– A body with a relative density equal to one will float just below the surface of the water
Physical Principles of Water
• Relative Density
– When a body is floating, the ratio of the submerged parts to those not submerged will be:
• 0.95 to 0.05 or
• 0.974 to 0.26
Physical Principles of Water
• Relative Density
– If the submerged portion of the body exceeds 0.05, then the amount of water displaced by the remainder will be insufficient to support the weight of the body.
• The pelvis and legs will sink
8/26/2014
6
Physical Principles of Water
• Hydrostatic Pressure
– The pressure of a liquid
Physical Principles of Water
– The molecules of a liquid thrust upon each part of the surface area of an immersed object or liquid
– The pressure will increase with increased depth in the liquid
Clinical Significance
• Buoyancy
– Reduces the stresses on immersed weight bearing joints
8/26/2014
7
Clinical Significance
– Provides an additional source of resistance for exercise training in the water if the part is moved downward against buoyancy
Clinical Significance
– The center of buoyancy (COB) will lie in a vertical line, if the COB falls outside of the BOS then the body will shift to try to maintain an upright position
Clinical Significance
• Relative Density
– Floating versus not floating
– Floating requires NO physical effort,
• Can dispel fears about the water
– The body will easily be supported by the water
– It will be easier to maintain an upright posture in water
8/26/2014
8
Clinical Significance
• Hydrostatic pressure – Pressure will be experienced as a
body is immersed in water
– Chest expansion will be more difficult • If the vital capacity is less than 1500cc
– Use floatation devices and extreme caution
– Edema reduction will be enhanced by external pressure
Resistance to Movement in Water
• Surface tension
– The force exerted between the surface molecules of a liquid manifesting itself as an “elastic skin” at the surface of the liquid
Resistance to Movement in Water
• Cohesion
– The attractive force exerted by each molecule on those surrounding it that are of the same type of matter