Zhang Gan-Lin, Liang Wei-Qiang, Ji Chen-Yang, Zhang Jin-Ming, Chen Yu-Hong
Department of Plastic Surgery, the Sun Yat-sun Memorial Hospital, Sun Yat-sen University, Guangzhou 510120, China.
Zhonghua Zheng Xing Wai Ke Za Zhi. 2013 Mar;29(2):97-100.
To comparatively study the difference of the skin expansion rate and instantly expanded skin retraction rate between implantation of double overlapping expanders and implantation of one single expander.
From Mar. 2009 to Mar. 2012, 22 cases with 39 sites for skin expansion, received double overlapping expanders in 24 sites, single expander in 15 sites. The area of original skin and expanded skin was measured by "wet-cloth sampling". Then the skin expansion rate was calculated. A distance of 5 cm at the center of expanded skin was re-measured after taking out the expanders. Then the instantly skin retraction rate was calculated.
During the same expansion period, the skin expansion rate was (3.5 +/- 0.9)% with the double overlapping expanders and (2.6 +/-0.6)% with one single expander, showing a significant difference between the two groups (P = 0. 002), while the instantly skin retraction rate was not statistically different [(30.3 +/- 0.8)% vs (32.3 +/- 0.9)%; P = 0.47)]. There was a negative relationship between the instantly skin retraction rate and the expansion period (r = -0.768).
The skin expansion rate can be increased with double overlapping expanders, while the instantly skin retraction rate doesn' t decrease. So the skin expansion efficiency is increased to reduce the re-expansion times for the patients with large lesions.
比较双重叠扩张器植入与单扩张器植入的皮肤扩张率及即时扩张皮肤回缩率的差异。
2009年3月至2012年3月，22例共39个皮肤扩张部位，其中24个部位采用双重叠扩张器，15个部位采用单扩张器。采用“湿布取样”法测量原皮肤面积及扩张后皮肤面积，计算皮肤扩张率。取出扩张器后，在扩张皮肤中心处再次测量5 cm距离，计算即时皮肤回缩率。
在相同扩张期内，双重叠扩张器组皮肤扩张率为（3.5±0.9）%，单扩张器组为（2.6±0.6）%，两组间差异有统计学意义（P = 0.002），而即时皮肤回缩率差异无统计学意义[（30.3±0.8）%对（32.3±0.9）%；P = 0.47]。即时皮肤回缩率与扩张期呈负相关（r = -0.768）。
双重叠扩张器可提高皮肤扩张率，且即时皮肤回缩率不降低，从而提高皮肤扩张效率，减少大面积病变患者的再次扩张次数。
