Procedure GuidesProcedure Guide

Subclavian Line Placement

Central line procedure example covering landmarks, complications, and procedural risk reduction.

Query: How to place subclavian line

Summary

Subclavian line placement is performed for obtaining central venous access when peripheral IV access is difficult or rapid resuscitation is required. Ultrasound guidance is recommended when available to improve first‐pass success and reduce complications.

Indications
  • Need for central venous access in critically ill patients 1
  • Difficult peripheral IV access or resuscitation requirements 2
  • Situations where IJ or femoral sites are contraindicated (e.g., cervical collar, pelvic fractures) 2
Contraindications
  • Coagulopathy or bleeding diathesis
  • Known or suspected pneumothorax on the contralateral side 1
Complications
  • Pneumothorax and hemothorax 1
  • Arterial puncture and hematoma
  • Catheter malposition (e.g., into the IJ) and subsequent thrombosis 4

Equipment

  • Essential: Central line kit (needle, guidewire, dilator, catheter), ultrasound machine with a high-frequency linear transducer, sterile gloves/gown, mask, antiseptic solution, sterile drapes
  • Optional: Micropuncture kit or angiocatheter (to reduce needle dislodgement) 15

Positioning and Landmarks

  • Position: Patient supine in a 15–20° Trendelenburg position; if possible, slightly abduct the ipsilateral arm and place a small towel roll between the scapulae to flatten the deltoid 12
  • Landmarks/US: Identify the subclavian vein just inferior or posterior to the medial third of the clavicle; with ultrasound, visualize the vein in a long axis beneath the clavicle and identify the first rib to minimize pleural injury 25

Analgesia/Sedation

OptionWhenKey note
Local anesthetic (1%–2% lidocaine)Prior to skin punctureEnsure adequate anesthesia along the needle trajectory
Minimal sedation (if needed)In anxious patients while maintaining airway precautionsUse caution in hemodynamically unstable patients

Steps

  1. Prep and drape the subclavicular area using full sterile technique.
  2. Administer local anesthesia along the proposed needle track.
  3. Using ultrasound, identify the subclavian vein below the clavicle. Adjust the probe to get a long-axis view if possible.
  4. Insert the introducer needle at the selected puncture site with a needle trajectory aimed toward the sternal notch, visualizing the needle tip throughout insertion.
  5. Upon obtaining non-pulsatile venous return, thread the guidewire through the needle, ensuring its smooth passage under ultrasound visualization.
  6. Remove the needle and use the dilator over the guidewire to gently dilate the tract.
  7. Advance the catheter over the guidewire into the vessel.
  8. Secure the catheter and cover with a sterile dressing.
  9. Confirm catheter placement with a post-procedure chest X-ray to rule out malposition or pneumothorax 14

Post-procedure

  • Confirm: Obtain a chest X-ray to verify catheter tip location and exclude pneumothorax.
  • Aftercare: Secure catheter appropriately; flush all lumens and maintain sterile technique.
  • Re-check: Monitor the patient’s respiratory status and insertion site for signs of bleeding or hematoma.

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References