Internal Jugular Vein

Anatomy of Internal Jugular Vein

1. INTERNAL JUGULAR VEIN V.S.RASHMI PRIYEM ULTRA’S BEST Dental Science College

2. IJV - Course It begins as the Direct Continuation Of The Sigmoid Sinus at the base of the skull below the jugular foramen Descends vertically downwards to end behind the sternal end of the clavicle by joining the Subclavian Vein to form the Brachiocephalic Vein Rashmi Priyem Saravanan

3. IJV - Course The Right Internal Jugular Vein is usually Larger Than the Left because it drains the blood from the Larger Superior Sagittal Sinus Left Internal Jugular Vein drains blood from the Smaller Inferior Sagittal Sinus . Rashmi Priyem Saravanan

4. Internal Jugular Vein The Internal Jugular Vein is usually the Largest Vein In The Neck The Internal Jugular Vein Drains from Brain and Most of the Tissues of the Head and Neck . Rashmi Priyem Saravanan

5. Special Features 1. It presents Two Dilatations : First, at its commencement, which Lies In The Jugular Fossa Of The Temporal Bone . It is known as Superior Bulb and is Related to the Floor of the Middle Ear. Second, close to its termination, which Lies In The Lesser Supraclavicular Fossa between the sternal and clavicular heads of sternocleidomastoid . It is known as Inferior Bulb and is Guarded by a Pair of Valves. Rashmi Priyem Saravanan

6. Superior And Inferior Bulb Rashmi Priyem Saravanan

7. Special Features 2. IJV is Vertically Applied to the lateral side of the Internal and Common Carotid Arteries , Enclosed with them and the Vagus Nerve in the Facial Sheath called Carotid Sheath Rashmi Priyem Saravanan

8. Special Features 3. The Deep Cervical Lymph Nodes Lie Along Its Entire Course. Rashmi Priyem Saravanan

9. Special Features 4. It is Remarkably Constant in Position Can be marked on the surface by a vertical line extending from midpoint between the Tip of the Mastoid Process and the Angle of the Mandible, to the Sternoclavicular Joint Rashmi Priyem Saravanan

10. Deep (Posterior) Relations 1. Rectus capitis lateralis . 2. Transverse process of atlas. 3. Levator scapulae. 4. Scalenus medius and Cervical plexus. 5. Scalenus anterior and P hrenic N erve . 6. Thyrocervical trunk and first part of Vertebral A rtery . 7. First part of the S ubclavian A rtery . 8. Thoracic Duct on the left side. 9. The S ternocleidomastoid overlaps the upper part and covers the lower part of the vein. Rashmi Priyem Saravanan

11. Deep (Posterior) Relations Rashmi Priyem Saravanan

12. Superficial ( Anterolateral ) Relations 1. Crossed by two muscles (a) Posterior belly of Digastric Muscle in the upper part. (b) Inferior belly of Omohyoid in the lower part. 2. Crossed by two arteries (a) Occipital Artery. (b) Posterior Auricular Artery. 3. Crossed by one vein Anterior Jugular Vein 4. Crossed by two nerves (a) Spinal Accessory Nerve. (b) Inferior Root of Ansa cervicalis ( Descendens cervicalis ). 5. At the base of skull the internal carotid artery lies in Front of the Internal Jugular Vein and the Last Four Cranial Nerves Intervene Between the Vein and the Artery. Rashmi Priyem Saravanan

13. Superficial ( Anterolateral ) Relations Rashmi Priyem Saravanan

14. Medial Relations 1. Internal Carotid Artery 2. 9th , 10th, 11th, and 12 th Cranial Nerves in the upper part 3 . Common Carotid Artery 4 . Vagus Nerve in the lower part. Rashmi Priyem Saravanan

15. Tributaries 1. Inferior Petrosal Vein —is usually the First Tributary and joins the Internal Jugular Vein immediately below the Jugular Foramen. 2. Pharyngeal Veins —from Pharyngeal Plexus. 3. Common Facial Vein . 4. Lingual Vein . 5. Superior Thyroid Vein . 6. Middle Thyroid Vein . 7. Occipital Vein (only sometimes) Rashmi Priyem Saravanan

16. Tributaries Rashmi Priyem Saravanan

17. Clinical Correlation The Internal Jugular Vein acts as a Guide for Surgeons during removal of Deep Cervical Lymph Nodes . Rashmi Priyem Saravanan