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Updated: Jul 15, 2026

The Supraclavicular Fossa Ultrasound View for Central Venous Catheter Placement and Catheter Change Over Guidewire
Published on: December 23, 2014
An unusual case of the cephalic vein with a supraclavicular course
Ernest W Lau1, Reginald Liew, Stuart Harris
1Department of Cardiology, St. Bartholomew's Hospital, London, UK. ernest.lau@btinternet.com
Insights
Device implanters should recognize an uncommon cephalic vein anomaly that can complicate pacemaker lead placement. This anatomical variation requires awareness to prevent potential damage during transvenous lead insertion.
Area of Science:
- Cardiovascular Surgery
- Medical Device Implantation
- Anatomy
Background:
- Transvenous lead placement for pacemakers and defibrillators typically utilizes subclavian or axillary vein access.
- Some implanters prefer cephalic vein cutdown due to concerns about pneumothorax and subclavian crush during central venous access.
Observation:
- An anatomical anomaly exists where the cephalic vein crosses superficial to the clavicle, joining the external jugular vein.
- This superficial course makes the cephalic vein an unappealing target for standard venous access procedures.
Findings:
- Attempting to use a guidewire through this anomalous cephalic vein to puncture the subclavian vein is often unsuccessful.
- This technique carries a risk of accidental damage to critical structures within the thoracic inlet region.
Implications:
- Awareness of this cephalic vein anatomical variation is crucial for device implanters.
- Understanding this anomaly is essential for safe and effective transvenous lead placement, preventing potential complications.
Abstract:
While the subclavian or axillary vein can be safely and successfully punctured in the majority of cases, some device implanters still prefer cut down to the cephalic vein as the initial approach to venous access for transvenous placement of pacemaker or defibrillator leads out of concern for the risk of pneumothorax, subclavian crush, and other possible complications. However, very occasionally, the cephalic vein crosses superficial to the clavicle to join the external jugular vein, making it rather unappealing for this purpose. Relying on a guide wire introduced through the cephalic vein to guide puncture of the subclavian vein is unlikely to be successful in such a situation and may cause accidental damage to the vital structures in the thoracic inlet region. Device implanters need to be aware of this anatomical anomaly because of the implications for transvenous lead placement.
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