Slides to accompany the Better Breathing keynote presentation by Dr David Marlin.
This presentation was delivered at the inaugural HorseTech Conference on the 18th October 2017 hosted by the Royal Veterinary College London.
13. The harder the horse works the
more OXYGEN it uses
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LitresofOxygenperMinute
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Speed (metres/second)
Litres of Air Moved Per Minute
Litres of Oxygen Used Per Minute
14. The harder the horse works the
more AIR it moves in and out
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LitresofOxygenperMinute
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20. At Canter and Gallop Breathing and
Stride are linked 1 to 1
1 Stride1 Breath
IN
OUT
OUT110 – 170 STRIDES per minute
110 – 170 BREATHS per minute
21. At Canter and Gallop Breathing and
Stride are linked 1 to 1
1 Stride1 Breath
IN
OUT
Anything that limits STRIDE (e.g. lameness) limits BREATHING
Anything that limits BREATHING, limits STRIDE
27. How do we know the lungs limit
performance?
Oxygen in air = 21%
21% O2
O2
28. How do we know the lungs limit
performance?
Oxygen in air = 21%
If we give 30% O2
then the heart can
pump it and the
muscles can use it!
↑ Performance!
30% O2
O2
29. How do we know the lungs limit
performance?
Air has a density of 1.25g/l
Breathing Heliox
(21% O2 in helium)
Density = 0.5g/l
= less work for the lungs
↑ Performance!
21% O2
O2
44. Possible Causes/Types of Respiratory
Disease in Horses
Viruses
e.g. influenza, herpes virus
Bacteria
e.g. Pneumonia, Strangles,
“Shipping fever”
Allergens
e.g. mould, pollen, dust, mites
Irritants
e.g. pollution, cold air
Other
e.g. EIPH (“Bleeding”),
Roaring, Gurgling
Parasites
e.g. lungworm
45. Possible Causes/Types of Respiratory
Disease in Horses
Viruses
e.g. influenza, herpes virus
Bacteria
e.g. Pneumonia, Strangles,
“Shipping fever”
Allergens
e.g. mould, pollen, dust, mites
Other
e.g. EIPH (“Bleeding”),
Roaring, Gurgling
Parasites
e.g. lungworm
Irritants
e.g. pollution, cold air
↓ Performance
46. No Commercial, Practical, Accurate system
to allow us to measure Ventilation or
Oxygen Consumption in the field!