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RE: [RC] shoes impeding circulation-not! - Von Simson, Cristiano

The blood is pumped by the increased pressure on the palmar/plantar blood 
vessels inside the hoof when the horse bears weight on one limb.
The hoof expansion is part of a shock-absorbing mechanism to reduce concussion 
to the limb structures (bones, cartilages, etc.) That is why we should avoid 
placing nails or clips on the rear of the shoe.
The two events happen at the same time, but the hoof expansion/contraction is 
not pumping blood, the increased pressure inside the hoof during weight bearing 
is.



Cristiano von Simson, DVM


-----Original Message-----
From:   ridecamp-owner@xxxxxxxxxxxxxxxxx 
[mailto:ridecamp-owner@xxxxxxxxxxxxxxxxx]  On Behalf Of heidi@xxxxxxxxxxxxxxx
Sent:   Monday, August 30, 2004 10:04 AM
To:     Vallonelee@xxxxxxx
Cc:     anyone@xxxxxxxxxxxxx; Ridecamp@xxxxxxxxxxxxx
Subject:        Re: [RC]   shoes impeding circulation-not!

But given the above, if the expanded hoof contains more volume would
that  same volume decrease when the load was removed (i.e. the hoof in
flight) and  therefore cause a pumping of the blood ? Just interested in
knowing more.

There is pressure on the bottom of the foot when the hoof lands.  I
suspect that this pushes blood out of the bottom and up along the expanded
periphery.  Since veins have valves, preventing backflow, when the hoof
contracts again when the pressure is removed, that would cause the blood
around the periphery of the foot to move on up the veins.

Heidi



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