Repair of soft tissue defect in hand or foot with lobulated medial sural artery perforator flap / 中华整形外科杂志

<p><b>OBJECTIVE</b>To explore the clinical effect of the lobulated medial sural artery perforator flap in repairing soft tissue defect in hand or foot.</p><p><b>METHODS</b>Since March 2012 to September 2014, 6 cases with soft tissue defects in hands or feet were treated by lobulated medial sural artery flaps pedicled with 1st musculo-cutaneous perforator and 2st musculo-cutaneous perforator of the medial sural artery. The size of the flaps ranged from 4.5 cm x 10.0 cm to 6.0 cm x 17.0 cm.</p><p><b>RESULTS</b>5 cases of lobulated flap survived smoothly, only 1 lobulated flap had venous articulo, but this flap also survived after the articulo was removed by vascular exploration. All flaps had desirable appearance and sensation and the two-point discrimination was 6 mm in mean with 4 to 12 months follow-up (average, 7 months). Linear scar was left in donor sites in 3 cases and skin scar in 3 cases. There was no malfunction in donor sites.</p><p><b>CONCLUSIONS</b>Lobulated medial sural artery perforator flap is feasible and ideal method for the treatment of soft tissue defect in hand or foot with satisfactory effect.</p>

Comparison of base substitutions in response to nitrogen ion implantation and 60Co-gamma ray irradiation in Escherichia coli

To identify the specificity of base substitutions, a novel experimental system was established based on rifampicin-resistant (Rif r) mutant screening and sequencing of the defined region of the rpoB gene in E. coli. We focused on comparing mutational spectra of base substitutions induced by either low energy nitrogen ion beam implantation or 60Co-gamma rays. The most significant difference in the frequency of specific kinds of mutations induced by low energy nitrogen ion beam was that CG -> TA transitions were significantly increased from 32 to 46, AT -> TA transversions were doubled from 7 to 15 in 50 mutants, respectively. The preferential base substitutions induced by nitrogen ion beam implantation were CG -> TA transitions, AT -> GC transitions, AT -> TA transversions, which account for 92.13 percent (82/89) of the total. The mutations induced by 60Co-gamma rays were preferentially GC -> AT and AT -> GC transitions, which totaled 84.31 percent (43/51).