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The Veins 静脉 山东大学医学院 解剖教研室 李振华 The Veins 静脉 General feature Thin walls, larger lumens, venous valves, venous plexus, venous rete Two sets Superficial vein Deep veins Special structures: Sinuses of dura mater 硬脑膜窦 Diploic veins 板障静脉 The Veins 静脉 Venous valve Sinuses of dura mater Diploic veins The Veins 静脉 Composition The pulmonary veins 肺静脉 R. & L. superior & inferior pulmonary veins → left atrium The systemic veins Superior vena cava system 上腔静脉系 Inferior vena cava system 下腔静脉系 (hepatic portal system 肝门静脉系) Cardiac vein system 心静脉系 Superior vena cava system 上腔静脉系 Veins of head and neck Facial vein 面静脉 Begins at medial angle of eye (angular vein 内眦静脉) Runs downward and backward through the face, posterior to the facial artery Below angle of mandible, joins anterior branch of retromandibular vein 下颌后静脉 to form common facial vein 面总静脉, which drains into internal jugular vein 颈内静脉 Veins of head and neck Facial vein 面静脉 Connections with cavernous sinus 海绵窦 through the ophthalmic vein 眼静脉, and also through pteygoid veous plexus 翼静脉丛 via the deep facial vein 面深静脉 Veins of head and neck “Danger triangle of the face” 面部危险三角 lies between root of nose and two angles of mouth In this area the facial vein has no valves Veins of head and neck Retromandibular v. 下颌后静脉 Formed by union of superficial temporal and maxillary veins Divides into an anterior branch that unites with facial vein and a posterior branch that joins posterior auricular vein to become external jugular vein Veins of head and neck ★ External jugular vein 颈外静脉 Formed behind angle of mandible by union of posterior auricular, posterior branch of retromandibular and occipital vein Crossing sternocleidomastoid to enter subclavian vein Anterior jugular vein 颈前静脉 Drains submandibular and anterior neck regions Descends near midline, runs posterior to sternal end of sternocleidomastoid to drain into external jugular vein or subclavian vein Veins of head and neck ★ Internal jugular vein 颈内静脉 Begin at jugular foramen, descending to join the subclavian vein to form brachiocephalic vein Lies lateral first to internal and then to common carotid a. within carotid sheath Chief extracranial tributaries Common facial vein 面总静脉 Lingual v. 舌静脉 Pharyngeal v. 咽静脉 Superior thyroid v. 甲状腺上静脉 Middle thyroid v. 甲状腺中静脉 Veins of head and neck Subclavian vein 锁骨下静脉 Continuation of axillary vein at the lateral border of first rib Joins internal jugular vein to form the brachiocephalic vein. ★Venous angle 静脉角 the junction of the subclavian vein and internal jugular vein Superficial veins of the upper limb Cephalic vein 头静脉 Arises from the lateral side of the dorsal venous rete on the back of hand Winds around the lateral border of the forearm; it then ascends into the cubital fossa and up the front of the arm on the lateral side of the biceps. It continues up in the deltopectoral groove and then to the infraclavicular fossa, where it pierces clavipectoral fascia to drain into axillary vein. Superficial veins of the upper limb Basilic vein 贵要静脉 Arises from the medial side of the dorsal venous rete of hand Winds around the medial border of the forearm; it then ascends into the cubital fossa and up the front of the arm on the medial side of the biceps to middle of the arm where it pierces the deep fascia and joins the brachial vein or axillary vein Superficial veins of the upper limb Median cubital vein 肘正中静脉 Links cephalic vein and basilic vein in the cubital fossa It is a frequent site for venipuncture to remove a sample of blood or add fluid to the blood Variations in the venous pattern of the upper limb Superficial veins are variable and are of significance clinically Veins of thorax Brachiocephalic veins 头臂静脉 Formed by union of internal jugular and subclavian veins posterior to the sternoclavicular joint Veins of thorax Superior vena cava 上腔静脉 Formed by union of right and left brachiocephalic veins behind the right sternocostal synchorndrosis of first rib Runs vertically down on right of ascending aorta Joined by azygos vein at level of sternal angle Enters right atrium at lever of lower border of third right sternocostal joint Collects blood from veins of upper half of body Veins of thorax Azygos vein 奇静脉 Begins as continuation of right ascending lumbar vein Ascending along the right side of vertebral column Joins superior vena cava by aching above right lung root at level of T4 to T5 Receives right posterior intercostals and subcostal veins plus some of bronchial, esophageal and pericardial veins, and hemiazygos vein Tributaries Hemiazygos v. 半奇静脉 Accessory hemiazygos v. 副半奇静脉 Veins of thorax Veins of vertebral column External vertebral venous plexus 椎外静脉丛 Internal vertebral venous plexus 椎内静脉丛 Inferior vena cava system 下腔静脉系 Veins of lower limb Great saphenous v. 大隐静脉 Begins the medial end of dorsal venous arch of food Passes anterior to the medial malleolus and ascends on the medial side of the leg, then passes behind the knee and curves forward around the medial side of the thigh Inclines anteriorly through the thigh to enter the femoral vein through the saphenous hiatus which lies about 3~4 cm below and lateral to the pubic tubercle Tributaries: Superficial medial femoral v. 股外侧浅静脉 Superficial lateral femoral v. 股内侧浅静脉 External pudendal v. 阴部外静脉 Superficial epigastric v. 腹壁浅静脉 Superficial iliac circumflex v. 旋髂浅静脉 Superficial epigastric v. Superficial circumflex iliac v. External pudendal v. Superficial medial femoral v. Superficial lateral femoral v. Great saphenous v. Varicose veins Veins of lower limb Small saphenous v. 小隐静脉 Arises from the lateral part of the dorsal venous arch of foot Ascends behind lateral malleolus and then runs up the midline of the back of the leg Pierces the deep fascia and enters the popliteal v. Drains the lateral side of the foot and ankle and the back of the leg. Veins of pelvis Internal iliac vein 髂内静脉 Parietal tributaries: accompany with arteries Visceral tributaries External iliac vein 髂外静脉 – accompany the artery Common iliac vein 髂总静脉 – formed by union of internal and external iliac veins in front of sacroiliac joint, end upon L4~L5 by uniting each other to form inferior vena cava Veins of pelvis Internal iliac vein 髂内静脉 Parietal tributaries: accompany with arteries Visceral tributaries ① Rectal venous plexus →superior rectal vein→inferior mesenteric v. →inferior rectal vein→internal iliac v. →anal vein→internal pudendal v. ② Vesical venous plexus 膀胱静脉丛→vesical v. ③ Uterine venous plexus 子宫静脉丛→uterine v. 直肠静脉丛 Inferior vena cava 下腔静脉 Formed by union of two common iliac veins anterior and just to the right of L4~L5 Ascends on the right side of aorta, pierces vena cava foramen of diaphragm at the level of T8, and drains into the right atrium Conveys blood from the whole body below the diaphragm to the right atrium Inferior vena cava 下腔静脉 Chief tributaries Parietal Paired inferior phrenic v. 膈下静脉 paired lumbar v. 腰静脉 (four) Visceral Right and left renal veins 左、右肾静脉 Right suprarenal vein 右肾上腺静脉 (left drain into left renal vein) Right testicular or ovarian v. 右睾丸(卵巢)静脉 (left drain into left renal vein) Hepatic veins 肝静脉: right, left and intermediate Hepatic portal vein 肝门静脉 General features Formed behind the neck of pancreas by the union of superior mesenteric vein and splenic vein Ascends upwards and to the right, posterior to the first part of duodenum and then enters the lesser omentum to the porta hepatis, where it divides into right and left branches There are no functioning valves in hepatic portal system Drains blood from gastrointestinal tract from the lower end of oesophagus to the upper end of anal canal, pancreas, gall bladder, bile ducts and spleen Variation and anomalies of hepatic portal vein Hepatic portal vein 肝门静脉 Tributaries of hepatic portal v. 1. Superior mesenteric v. 肠系膜上静脉 2. Inferior mesenteric v. 肠系膜下静脉 3. Splenic v. 脾静脉 4. Left gastric v. 胃左静脉 5. Right gastric v. 胃右静脉 6. Cystic v. 胆囊静脉 7. Paraumbilical v. 附脐静脉 Portosystemic anastomoses 1. At the lower end of the oesophagus Hepatic portal vein → left gastric vein → esophageal venous plexus → esophageal vein → azygos vein → superior vena cava 2. At rectal venous plexus Hepatic portal vein → splenic vein → inferior mesenteric vein → superior rectal vein → rectal venous plexus → inferior rectal and anal veins → internal iliac vein → inferior vena cava 3. At periumbilical venous rete Hepatic portal vein→paraumbilical vein→periumbilical venous rete→ thoracoepigastric and superior epigastric vein → superior vena cava superficial epigastric and inferior epigastric veins → inferior vena cava Portal-systemic anastomoses 4. Portal-retroperitoneal anastomosis Between the retroperitoneal branches of the colic veins and the lumbar veins, pancreaticoduodenal veins with the renal veins and the subcapsular veins of the liver with the phrenic veins, twigs of colic veins (portal) anastomosing with systemic retroperitoneal veins