Watkins Colyn J, Zivaljevic Nikola, Eberlin Kyle R, Rivlin Michael, Mudgal Chaitanya S
1 Harvard Medical School, Boston, MA, USA.
Hand (N Y). 2017 May;12(3):297-300. doi: 10.1177/1558944716661998. Epub 2016 Jul 28.
Accurate identification of surface anatomy is critical to identify the location of the A1 pulley. The intercrease line (ICL) describes a transverse line between the radial edge of the proximal palmar crease and the ulnar edge of the distal palmar crease. We hypothesize that this easily identifiable surface landmark approximates the location of the A1 pulley.
The ICL was marked on 7 cadaver hands. We marked a point proximal to the proximal digital crease (PDC) equal to the distance between each digit's proximal interphalangeal crease (PIC) and PDC (the PIC/PDC point). We calculated the distance between PIC/PDC points and proximal edge of the A1 pulleys.
The ICL was proximal to A1 in all digits. The PIC/PDC point was distal to A1 in the ring finger, and proximal to A1 in the index, middle, and small fingers. The PIC/PDC point was closer to the A1 pulley than the ICL in the middle and ring fingers.
Despite less accuracy than the PIC/PDC point at approximating the location of the A1 pulley, the ICL is reliably proximal to the A1 pulley.
准确识别表面解剖结构对于确定A1滑车的位置至关重要。掌褶间线（ICL）描述了近端掌褶的桡侧边缘与远端掌褶的尺侧边缘之间的一条横线。我们假设这个易于识别的表面标志近似于A1滑车的位置。
在7具尸体手上标记ICL。我们在近端指褶（PDC）近端标记一个点，其距离等于每个手指的近端指间褶（PIC）与PDC之间的距离（PIC/PDC点）。我们计算了PIC/PDC点与A1滑车近端边缘之间的距离。
在所有手指中，ICL均位于A1滑车近端。在环指中，PIC/PDC点位于A1滑车远端，而在示指、中指和小指中，PIC/PDC点位于A1滑车近端。在中指和环指中，PIC/PDC点比ICL更靠近A1滑车。
尽管在近似A1滑车位置方面不如PIC/PDC点准确，但ICL始终位于A1滑车近端。
