How do I determine optimal pressure for Tourniquet operation?
Setting tourniquet pressure as a function of a patients pre operative systolic Blood Pressure is inadequate because it does not take into account adjustments that must be made due to differing cuff widths, differing degrees of matching between cuff shape and limb shape,differing degrees of snugness of cuff application to the limb and differences in the characteristics of the limb tissue beneath the cuff. Therefore setting tourniquet pressure as a function of LOP inherently takes into account all of these variables. Hence the optimal guideline for setting the pressure of a constant Pressure Tourniquet is based on “Limb Occlusion Pressure” (LOP). For increased safety, pressure be set at “Minimum Effective Pressure” as there is no “Maximum Safe Pressure”. LOP can be defined as the minimum pressure required, at a specific time in a specific tourniquet cuff applied to a specific patients limb at specific location, to stop the flow of arterial blood into the limb distal to the cuff.
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