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
Difficult peripheral IV access or resuscitation requirements
Situations where IJ or femoral sites are contraindicated (e.g., cervical collar, pelvic fractures)
Contraindications
Coagulopathy or bleeding diathesis
Known or suspected pneumothorax on the contralateral side
Complications
Pneumothorax and hemothorax
Arterial puncture and hematoma
Catheter malposition (e.g., into the IJ) and subsequent thrombosis
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)
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
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
Analgesia/Sedation
Option
When
Key note
Local anesthetic (1%–2% lidocaine)
Prior to skin puncture
Ensure adequate anesthesia along the needle trajectory
Minimal sedation (if needed)
In anxious patients while maintaining airway precautions
Use caution in hemodynamically unstable patients
Steps
Prep and drape the subclavicular area using full sterile technique.
Administer local anesthesia along the proposed needle track.
Using ultrasound, identify the subclavian vein below the clavicle. Adjust the probe to get a long-axis view if possible.
Insert the introducer needle at the selected puncture site with a needle trajectory aimed toward the sternal notch, visualizing the needle tip throughout insertion.
Upon obtaining non-pulsatile venous return, thread the guidewire through the needle, ensuring its smooth passage under ultrasound visualization.
Remove the needle and use the dilator over the guidewire to gently dilate the tract.
Advance the catheter over the guidewire into the vessel.
Secure the catheter and cover with a sterile dressing.
Confirm catheter placement with a post-procedure chest X-ray to rule out malposition or pneumothorax
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.