研究拇指和食指的标准测量以帮助重建手术

Q3 Medicine

Journal of Hand Surgery Global Online Pub Date : 2025-07-23 DOI:10.1016/j.jhsg.2025.100792

Sydney Boike MD , Mikayla J. Baker MD , Lucas Ray MD , Ali Odenthal MPH , Deb Bohn MD , Ann Van Heest MD

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引用次数: 0

摘要

目的探讨拇指相对于食指的规范性测量；这可能有助于指导手部手术重建和确定拇指是增生还是肥大。方法对162名明尼苏达州博览会参与者进行拇指、食指长度、宽度、周长测量；指间关节和掌指关节关节活动范围（ROM）；握力和握力。结果参与者平均年龄42.5岁（14-88岁），女性57%，白人86%，右撇子86%。左边和右边显示了每个参与者拇指和食指大小的相似性。男性的拇指和食指的长度和周长更大，握力和握力更强，但与女性相比，ROM的差异很小。食指指甲的比例是缩略指甲的75%。拇指长度为食指的73%，拇指指间周长为食指近端指间关节（PIP）的80%。平均而言，拇指尖位于PIP关节近端1.9 cm处。结论拇指和食指的人体测量结果显示，右手和左手在长度、周长、ROM和力量方面具有相似性。男性与女性在大小和力量上存在较大差异，但在ROM上没有差异。拇指尖平均位于PIP关节近端19mm处，这与传统的食指指向性教学将拇指尖长度设置为相邻手指PIP关节的水平相反。研究类型/证据水平治疗性IV。

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Investigating Normative Measurements of the Thumb and Index Finger to Aid in Reconstructive Surgery

Purpose

This study aims to investigate normative measurements of the thumb relative to the index finger; this may help guide hand surgery reconstruction and define a thumb as hyperplastic or hypertrophic.

Methods

In total, 162 Minnesota State Fair participants were measured for thumb and index finger length, width, girth; joint range of motion (ROM) of the interphalangeal and metacarpophalangeal joints; and pinch and grip strength.

Results

Participants’ age averaged 42.5 (range 14–88) years with 57% female, 86% White, and 86% right-handed. The right and left demonstrated similarity of thumb and index finger size for each participant. Men demonstrated larger length and girth of the thumb and index finger and stronger pinch and grip strengths but have minimal differences in ROM compared to women. The ratio of the index fingernail is 75% of the thumbnail. The length of the thumb is 73% of the index finger, and the thumb interphalangeal girth is 80% of the index finger proximal interphalangeal (PIP) joint. On average, the thumb tip sits 1.9 cm proximal to the index PIP joint.

Conclusions

Anthropometric measurements of the thumb and index fingers demonstrate similarities of right and left hands for length, girth, ROM, and strength. Differences exist with size and strength greater for men compared with women, without differences in ROM. The thumb tip, on average, sits 19 mm proximal to the PIP joint, which is contrary to the conventional teaching for index pollicization to set the thumb tip length to the level of the adjacent finger PIP joint.