Continuous carbon dioxide flow via a modified 4-way stopcock to prevent hemostatic spray catheter clogging

Clogging of the Hemospray catheter (TC-325 Hemospray; Cook Medical, Bloomington, Ind, USA) is a common technical challenge, particularly when the tip becomes wet during endoscopic procedures, leading to interruption of hemostasis. A prior solution described a modified airflow connection to prevent occlusion. We developed a simplified, reproducible method using commercially available carbon dioxide (CO₂) insufflation devices and tubing, connected via a 4-way stopcock to provide continuous CO₂ flow through the Hemospray catheter.

The assembly incorporated commercially available CO₂ insufflation devices and tubing, a 4-way stopcock, and the standard Hemospray system. Continuous CO₂ flow was maintained throughout the procedure to displace moisture and preserve lumen patency.

Continuous CO₂ flow effectively prevented catheter occlusion and maintained uninterrupted spray function even after fluid contact. The demonstration confirmed consistent delivery without clogging.

This 4-way stopcock enables continuous CO₂ flow through the Hemospray catheter, preventing clogging in a simple, low-cost, and reproducible manner. The set-up is readily adaptable to existing endoscopic systems and may enhance procedural efficiency and device reliability.