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在100侧成人头静脉末段中,行走于三角胸大肌沟内占93.9%,在锁骨中1/3外侧部下方一横指的此沟内,几乎全部能找到头静脉。头静脉锁骨下曲小于90度者占5.1%,可影响插管,须外展上肢校正。头静脉末段单干型多见,占96.0%。常汇入腋静脉。如头静脉双侧汇入颈外静脉,或口径细小,插管均难成功。头静脉末段汇集三角肌支、肩峰支和胸肌支,存在一对瓣膜或单瓣者占61.6%,二对(或单瓣)以上者占28.3%,无瓣膜者占10.1%。
In the 100 adult distal venous end, walking in the triangular pectoralis major groove accounted for 93.9%, in the clavicle in 1/3 lateral below this one groove in the groove, almost all can find the first vein. Head of the subclavian song less than 90 degrees accounted for 5.1%, can affect the intubation, abduction to be corrected upper limbs. The last part of the single-head vein more common, accounting for 96.0%. Often into the axillary vein. Such as the head vein bilateral import jugular vein, or small caliber, intubation are difficult to succeed. The distal segment of the cephalic vein has a combination of the deltoid branch, the acromion branch, and the pectoralis branch, with a single valve or flap accounting for 61.6%, 28.3% for two (or more than one valve), and 10.1% for valveless.