Intracavitary EKG: A non-inferiority, prospective observational study comparing two methods, three devices

Area of Science:

• Medical Devices
• Cardiology
• Interventional Radiology

Background:

• Accurate central venous catheter tip placement is vital for patient safety.
• Intracavitary electrocardiography (I-EKG) is a radiation-free alternative to X-rays for catheter positioning.
• This study compares I-EKG tracing quality using two saline column methods.

Purpose of the Study:

• To evaluate and compare the quality of I-EKG tracings obtained via different saline column methods.
• To assess the procedural simplicity and safety of pure saline column techniques for central venous catheter placement.

Main Methods:

• A prospective study involving 12 patients undergoing peripherally inserted central catheter (PICC) placement.
• I-EKG tracings were recorded using three devices: alligator clip/spindle system, and two pure saline column methods ('red' and 'yellow' connectors).
• Objective (wave amplitude) and subjective (operator scale) analyses were performed on 36 tracings.

Main Results:

• No statistically significant differences in I-EKG tracing quality were observed among the three methods.
• Objective measurements of wave amplitude ratios showed equivalent performance across all techniques.
• Subjective evaluations by experienced operators also yielded comparable scores for all tested methods.

Conclusions:

• Pure saline column methods ('red' and 'yellow' connectors) provide similar I-EKG trace quality to the traditional method.
• These methods offer procedural simplicity and enhanced safety, potentially reducing arrhythmia risk.
• Findings support the adoption of pure saline column techniques for optimizing central venous catheter placement.