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Objective To discuss the clinical application of reverse dorsal metatarsal artery perforator flap for reconstruction of forefoot soft tissue defects.Methods Since January,2008 to March,2016,43 patients with forefoot soft tissue defect due to various causes were reconstructed with the flap based on dorsal metatarsal artery perforator.Dorsal pedis was used as a donor site with dorsal metatarsal artery perforator as the donor artery.The flap size varied from 2.0 cm × 4.0 cm to 6.0 cm × 8.0 cm.Among them,27,8,4 and 4 cases were reconstructed with flap based on first,second,third and fourth dorsal metatarsal artery perforator flap respectively.Results All the patients were followed-up which ranged from 3 months to 24 months.Six flaps suffered from post operative venous congestion.Out of 6,4 survived with early emergency management while the remaining 2 suffered epidermal necrosis which survived with regular dressing change.Eventually,all the flaps survived.They had good texture and they were elastic,good-looking and very wear-resisting.Walking function was normal.Conclusion Reverse dorsal metatarsal artery perforator flap is an ideal choice in reconstruction of small to medium sized soft tissue defects of forefoot.
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AIM: To investigate the adsorptive and separative properties of 5 kinds of macroporous adsorbing resins to the total saponins and alkaloids, which treated atrophic gastritis with Sanqi Qilian Decoction (Radix et Rhizoma Notoginseng, Radix Astragali, Rhizoma Coptidis.) METHODS: The adsorption capacities, contents and recoveries of the total saponins and alkaloids were selected as the evaluating quotas. The determination of the contents of the total saponins and alkaloids and the investigation into leakage and elution curve were completed with UV-VIS spectrophotometric method. RESULTS: AB-8 resin had the best adsorptive and separative properties to the total saponins and alkaloids in Sanqi Qilian Decoction. The applicable technology was as follows: the concentration of original solution of the extract of Sanqi Qilian Decoction was 40 mg/mL; the largest adsorption capacities on resin to the total saponins and alkaloids were 5.28 mg/mL and 12.38 mg/mL respectively; the eluant was 50% ethanol with 8 times of resin volume, and the elution velocity was 2 mL/min. AB-8 resin could be used for 4 times repeatedly after being reproducted by 95% ethanol and 1 mol/L NaOH. CONCLUSION: Under the process condition which had been selected above, AB-8 resin can be used successfully to adsorb and separate with over 20% of the content of the total saponins Sanqi Qilian Decoction, and 30% of the content of the total alkaloids in the 50% ethanol eluate, and with over 75% of total saponins recovery and 65% of total alkaloids recovery respectively.