胸导管的类型

THE TYPES OF THE THORACIC DUCT

在150具尸体(胎儿12具,小儿138具)上观察了胸导管的起始、走行和注入静脉的情况,根据观察的结果分为五型,综合文献讨论了它们的出现率、胚胎发生和临床意义。1.正常型胸导管,在腹腔以单干起始,上行于胸主动脉右侧,注入左颈静脉系,即一般教科书所记载的类型,出现率为84.67%。2.双干型胸导管,在腹腔以二干起始,上行于胸主动脉两侧,在胸部的不同水平两干会合,注入左颈静脉系,出现率为10.66%,未见到注入右颈静脉系的类型。3.分叉型胸导管,在腹腔内以单干起始,沿胸主动脉右侧上行,在第六~四胸椎水平分为2支,分别注入左、右颈静脉系,出现率为3.33%。未见到沿胸主动脉左侧上行的类型。4.右位型胸导管,在腹腔以单干起始,上行干主动脉右侧,注入右颈静脉系,出现率为0.67%。5.左位型胸导管,在腹控以单干起始,上行于主动脉左侧,注入左颈静脉角,出现率为0.67%。

The origin and the course of the thoracic duct and its opening into the vein were studied in 150 cadavers including 15 fetuses and 138 infants.They are classfied into 5 types.1.The normol type of the thoracic duct begins in the abdominal cavity as a single trunk,It ascends along the right side of the aorta and empties into the venous system on the left side at the root of the neck.This type of the duct which is described in the general text book,occurred in 84.67 per cent.2.The two-trunk type of the thoracic duct begins in the abdominal cavity as two trunks and ascends along the each side of the aorta.The two trunks join together at different levels in the thorax forming a single trunk which empties into the venous system on the left side at the root of the neck.This type of the duct occurred in 10.66 per cent.3.The bifurcated-type of the thoracic duct starts in the abdominal cavity as a single trunk and passing cephalad on the right side of the aorta and divides into two branches at the level of the 6th~4th thoracic vertebra,The right branch opens into the venous svstem on the right side and the left branch opens into the venous system on the left side.This type of the duct occurred in 3.33 per cent.The type which ascends along the left side of the aorta was found.4.The right thoracic duct begins in the abdominal cavity as a single trunk and runs its entire course along the left side of the aorta.The termination opens into the right jugular venous angle.This type of the duct occurred in 0.67 per cent.5.The left thoracic duct begins in the abdominal cavity as a single trunk and ascends along the left side of the aorta.It empties into the left jugular venous angle.This type of the duct occurred in 0.67 per cent.