Reconstructing thumb opposition function using modified transfer of proper extensor tendon of the fifth digit is one of the methods to treat old median nerve injury-induced thumb opposition dysfunction. To explore the long-term effect of this method, 97 patients undergoing modified transfer of proper extensor tendon of the fifth digit to reconstruct thumb opposition function in Department of Hand Surgery, Affiliated Hospital of Beihua University between January 2003 and December 2007 were retrospectively analyzed, and 21 were followed up. The thumb opposition function postoperatively was evaluated using Changing of Hand Function Evaluation Standard. After reconstructing thumb opposition function, length of thumb (T), distance moving to (mo) and moving away from (Mo) centre of palm in opposition, i.e. during closing and leaving centre of palm distance between middle point of thumb interdigit transverse striation and middle point of middle finger MP joint transverse striation. In addition, their ratios were calculated. The patients were followed-up for 7.5 years (ranging 1-14 years). It is a good therapy to reconstruct thumb opposition function using modified transfer of proper extensor tendon of the fifth digit.

Reconstructing thumb opposition function using modified transfer of proper extensor tendon of the fifth digit is one of the methods to treat old median nerve injury-induced thumb opposition dysfunction.To explore the long-term effect of this method,97 patients undergoing modified transfer of proper extensor tendon of the fifth digit to reconstruct thumb opposition function in Department of Hand Surgery,Affiliated Hospital of Beihua University between January 2003 and December 2007 were retrospectively analyzed,and 21 were followed up.The thumb opposition function postoperatively was evaluated using Changing of Hand Function Evaluation Standard.After reconstructing thumb opposition function,length of thumb (T),distance moving to (mo) and moving away from (Mo) centre of palm in opposition,i.e.during closing and leaving centre of palm distance between middle point of thumb interdigit transverse striation and middle point of middle finger MP joint transverse striation.In addition,their ratios were calculated.The patients were followed-up for 7.5 years (ranging 1-14 years).It is a good therapy to reconstruct thumb opposition function using modified transfer of proper extensor tendon of the fifth digit.

Objective To investigate the mechanism of venous reverse-flow flap in the differentperiod after operation.Methods The rabbits wero randomly allocated into 3 groups.In group A,including saphenous artery and venae commutante.In group B,saphenous artery without venae commutante.In group C,surface seeping and saphenous artery and venae commutante.Flap appearance,intravenous pressure,vessel diameter,mierocircular and histological examination were mea8ured.Results The difference of introvenous pressure between group A.B and C was obvious.Reverse flow WaS found in group A and C group through microcirculation observation 2 hours post-operation.Venous valve lose efficacy while the vessel diameter wes at maximum just after the pressure peak.Conclusion Venous retrograde return in reverse-flow island flaps can be achieved more easily through"incompetent valves route"than through "communicating and collaterall by pass route".By pass route is a supplementary way.Surface seeping Can slighfly relieve the venous pressure but can cause infection.