Cause for inadequate clearance: hemodialysis catheter migration into the coronary sinus

Area of Science:

• Nephrology and Vascular Access Management

Background:

• Central dialysis catheters are crucial for hemodialysis but prone to complications like thrombosis, stenosis, and infection.
• Catheter malposition, though less common, can also significantly impair function and patient outcomes.

Observation:

• A patient experienced a gradual decline in dialysis efficiency over months, presenting with clinical and biochemical evidence of inadequate clearance.
• Despite initial proper placement, the central dialysis catheter was suspected to have migrated.

Findings:

• Fluoroscopic examination revealed the central dialysis catheter had migrated from its intended position into the coronary sinus.
• This migration was the cause of the patient's suboptimal dialysis performance and reduced clearance.

Implications:

• Catheter migration, particularly into unusual locations like the coronary sinus, represents an insidious complication of central dialysis catheters.
• Clinicians should consider catheter migration in cases of unexplained decline in dialysis adequacy, even with previously well-functioning devices.