Dermatology Division, Department of Medicine, University of California, Los Angeles, California.
Division of Dermatology, Harbor-UCLA Medical Center, Torrance, California.
Dermatol Surg. 2023 Oct 1;49(10):949-955. doi: 10.1097/DSS.0000000000003881. Epub 2023 Aug 1.
Follicular unit excision is a favored minimally invasive hair transplantation method. However, it is suboptimal for many patients of African descent because of wide variations in hair and skin characteristics.
To evaluate the performance of a skin-responsive follicular unit excision device, which accommodates hair curliness, skin thickness, and firmness in patients of African descent.
The authors retrospectively evaluated patients who underwent scalp follicular unit (FU) excision using a skin-responsive technique at 7 multinational clinics. The preoperative donor grading for the anticipated difficulty used a scale with Class V indicating the highest degree of hair curliness, skin thickness, and firmness.
Of 64 eligible patients (45 males and 19 females), 28 had Class V FU excision donor grades. The mean transection rate for all patients was 3%-6%, which was highest in class V patients. Skin thickness and firmness had a greater effect on the maximum transection rate than hair curliness. Only 19 or 18 G punches were used.
The authors report consistence success of a new skin-responsive FU excision device for all patients of African descent with a mean graft transection rate of less than 10%. The findings support skin thickness and firmness as major influencers of graft attrition rate.
毛囊单位切取术是一种受欢迎的微创毛发移植方法。然而，由于头发和皮肤特征的广泛差异，它并不适合许多非洲裔患者。
评估一种皮肤响应毛囊单位切取装置的性能，该装置适应非洲裔患者的头发卷曲度、皮肤厚度和硬度。
作者回顾性评估了在 7 家跨国诊所使用皮肤响应技术进行头皮毛囊单位（FU）切取的患者。术前供区分级采用 V 级表示头发卷曲度、皮肤厚度和硬度最高的程度。
64 名符合条件的患者（45 名男性和 19 名女性）中，28 名患者的 FU 切取供区分级为 V 级。所有患者的平均切取率为 3%-6%，V 级患者的切取率最高。皮肤厚度和硬度对最大切取率的影响大于头发卷曲度。仅使用 19 或 18 G 打孔器。
作者报告了一种新的皮肤响应毛囊单位切取装置在所有非洲裔患者中的一致成功，平均移植率低于 10%。研究结果支持皮肤厚度和硬度是移植损耗率的主要影响因素。
