Imaging Anatomical Studies on the Safety Area of Injection Cite by using MRI

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1. Purpose : To investigate the diameters of the cutaneous veins located in the area of the cubital fossa used for blood sampling and intravenous injections, as well as the depths and locations of the nerves and blood vessels in the deep parts of the cubital fossa.2. Methods : On 95 subjects, plane CT slices were made along the Huter line(connecting the medial and lateral epicondyles of the humerus). 3. Results and Discussion : the diameters of the cutaneous veins in the plane slices made along the Huter line were : basilic vein.3. 44±1. 00mm ; median cubital vein, 4. 04±1. 18mm ; and cephalic vein, 3. 45±0. 88mm. Furthermore, the angles and distances from the midpoint of the Huter line to the brachial vein, brachial artery and median nerve were 57. 88o±13. 67o, 56. 73o±13. 11o, 64. 72o±26. 38o respectively ; and 18. 96±6. 13mm, 15. 78±5. 23mm, and 19. 42±6. 09mm respectively. It is therefore clear that special care is called for when inserting needles into the cutaneous veins on the ulnar side.