Singh Rajani
Department of Anatomy, Uttar Pradesh University of Medical Sciences, Saifai, India.
J Craniofac Surg. 2020 Jun;31(4):e354-e355. doi: 10.1097/SCS.0000000000006293.
External jugular vein is formed by joining of posterior division of retromandibular vein and posterior auricular vein and common facial vein drain into internal jugular vein.Variations are not uncommon and these are more often observed in veins than in arteries. Aim of the study is to report the prevalence of unique variation of formation of external jugular vein.Head and neck of 6 cadavers (12 sides) fixed in 10% formalin were dissected in the department of anatomy AIIMS Rishikesh for the variant formation of external jugular vein.Abnormal formation of external jugular vein was detected in 1 cadaver on left side. The mean age of the cadavers was 70 years. The retromandibular vein divided into anterior and posterior divisions 2.5 cm below the angle of mandible. The facial, after travelling for 6 cm below the mandible, along with anterior and posterior divisions abnormally joined to form the external jugular vein. This is unique and rare finding.External jugular vein is used for assessment of venous pressure in right atrium and for catheterization. The variation may give false value of pressure due to facial vein draining into it, also create difficulty in catheterization. In addition to this, these veins are also used for various other procedures like carotid endarterectomy and for oral reconstruction surgeries. Thus facial vein and external jugular vein variations are of paramount importance to head and neck surgeons, anatomists and anesthetist.
颈外静脉由下颌后静脉后支与耳后静脉汇合而成，面总静脉注入颈内静脉。变异并不罕见，而且在静脉中比在动脉中更常观察到。本研究的目的是报告颈外静脉形成的独特变异的发生率。在全印医学科学研究所瑞诗凯诗分校解剖学系，对6具用10%福尔马林固定的尸体（12侧）的头颈部进行解剖，以观察颈外静脉的变异形成。在1具尸体的左侧检测到颈外静脉的异常形成。尸体的平均年龄为70岁。下颌后静脉在下颌角下方2.5厘米处分为前支和后支。面静脉在下颌下方走行6厘米后，与前支和后支异常汇合形成颈外静脉。这是一个独特且罕见的发现。颈外静脉用于评估右心房的静脉压和进行导管插入术。由于面静脉汇入其中，这种变异可能会给出错误的压力值，也会给导管插入术带来困难。除此之外，这些静脉还用于各种其他手术，如颈动脉内膜切除术和口腔重建手术。因此，面静脉和颈外静脉的变异对头颈外科医生、解剖学家和麻醉师至关重要。
