Experimental treatment of tendon injury with heparin

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Abstract

The effect of heparin on the progress of healing in the injured tendon was examined after a standard injury had been created in the Achilles tendons of New Zealand White rabbits. Half of the rabbits were then treated by the intratendinous injection of heparin. The diameters of the injured right hind and the uninjured left hind Achilles tendon and overlying skin were measured using vernier calipers before injury and at one month after injury. At this time histological analysis was carried out on all Achilles tendons and tendon dry weight, collagen concentration and DNA concentration were measured. Orientation of collagen fibres was more pronounced in treated than untreated tendons while cellularity and blood vessel density were less pronounced. Analysis by Students t-test demonstrated a statistically significant difference between treated and untreated tendons in terms of leg diameter (p < 0.005), dry weight (p < 0.01) and DNA concentration (p < 0.01).

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