Key Specifications and Procedural Parameters:

• Standard Catheter Size (Adult): 7–8 French, 2-3 lumens, 20–30 cm in length.
• Insertion Depths (Targeting SVC):
  • Right Internal Jugular (RIJV): 12–15 cm.
  • Left Internal Jugular (LIJV): 15–20 cm.
  • Subclavian Vein (SCV): Formula: (Height in cm / 10) - 2 cm (Right), +2 cm (Left).
• Needle Gauge: 18-gauge introducer needle.
• Patient Positioning: 15 to 30-degree Trendelenburg (head down) for jugular/subclavian to prevent air embolism and distend veins.
• Anatomical Landmarks:
  • Internal Jugular (Central Approach): Apex of Sedillot's triangle (formed by sternal/clavicular heads of sternocleidomastoid and clavicle).
  • Subclavian (Infraclavicular): 1–2 cm inferior/lateral to the clavicular transition point.
  • Femoral: 1–2 cm medial to the femoral artery pulse, below the inguinal ligament.