Patient-Based Ratio Method for Permanent Zone Donor Area Calculation in Hair Transplant

Author:

Punia Sudhanshu1,Goel Aakanksha1ORCID,Gupta Amit1

Affiliation:

1. Aesthetic and Cosmetic Plastic Surgery, Divine Aesthetic Surgery, Greater Kailash, New Delhi, India

Abstract

Abstract Introduction Most common type of hair loss is androgenetic alopecia. Orentreich's donor dominance theory and the definition of safe donor area are the theoretical foundation of modern hair transplantation. In safe donor area no progression of permanent hair loss occurs. Its knowledge is important to prevent loss of transplanted hair. Estimation is not tailored to every patient, also in early stages, the margins are assumed to be free from future hair loss. Our study is an attempt to find and establish a relationship between safe zone dimensions and other standard scalp dimensions, and effectively predict the complete safe zone in early stages of hair loss. Materials and Methods From July to December 2022, the first 100 patients with Norwood IV onwards of hair loss were included. Then, the distance between the vertex and the point of change in occipital hair quality and density was measured, and from this point till occipital protuberance were taken. The ratio between the two was taken. In the next 100 patients of Norwood II to IVa, the applicability of the new ratio to assess the permanent zone was used. Results Ratio method takes into account the patient's measurements, that is, permanent zone and total distance from vertex occiput. The ratio range we got is:Permanent zone: total distance from vertex to occiput: 0.43–0.53Therefore, the permanent zone would be equal to = total distance from vertex to occiput × 0.43–0.53. With the lower limit being the occiput. Over 90% of the patients did not have significant reduction in density of transplanted hair. Conclusion The authors suggest the use of this ratio method to determine the dimensions of the permanent zone especially in patients with early grades of hair loss as per the Norwood scale. It is a simple, effective, and easily applicable concept that can ensure long-lasting results in patients undergoing hair transplants.

Publisher

Georg Thieme Verlag KG

Reference14 articles.

1. Hairdressing and the prevalence of scalp disease in African adults;N P Khumalo;Br J Dermatol,2007

2. Patterned loss of hair in man; types and incidence;J B Hamilton;Ann N Y Acad Sci,1951

3. Autografts in alopecias and other selected dermatological conditions;N Orentreich;Ann N Y Acad Sci,1959

4. The donor area;R G Knudsen;Facial Plast Surg Clin North Am,2004

5. Current understanding of androgenetic alopecia. Part II: clinical aspects and treatment;R Hoffmann;Eur J Dermatol,2000

同舟云学术

1.学者识别学者识别

2.学术分析学术分析

3.人才评估人才评估

"同舟云学术"是以全球学者为主线,采集、加工和组织学术论文而形成的新型学术文献查询和分析系统,可以对全球学者进行文献检索和人才价值评估。用户可以通过关注某些学科领域的顶尖人物而持续追踪该领域的学科进展和研究前沿。经过近期的数据扩容,当前同舟云学术共收录了国内外主流学术期刊6万余种,收集的期刊论文及会议论文总量共计约1.5亿篇,并以每天添加12000余篇中外论文的速度递增。我们也可以为用户提供个性化、定制化的学者数据。欢迎来电咨询!咨询电话:010-8811{复制后删除}0370

www.globalauthorid.com

TOP

Copyright © 2019-2024 北京同舟云网络信息技术有限公司
京公网安备11010802033243号  京ICP备18003416号-3