Capillary Tubing Disconnects from Mixing Y at High Pump Speeds
Fix for capillary tubing disconnecting from the mixing Y on iCAP systems during high pump speed operation, including tubing modification steps to prevent leaks.
Issue
Capillary disconnects from the mixing Y when the pump operates at high speed, causing leaks.
Environment
- iCAP 7000 Series
- iCAP PRO Series
- Nebulizer
- Capillary tubing
- Mixing Y
- Peristaltic pump tubing
Resolution
- Remove the existing pump tubing from the mixing Y where the nebulizer capillary tubing connects.
- Cut a small section (~1–2 cm) from an Orange/White pump tube.
- Install the cut section of pump tubing onto the mixing Y securely.
- Cut the end of the capillary tubing with a straight cut (do not use a 45-degree angle).
- Grip the capillary tubing using a glove or sandpaper to improve handling.
- Push the capillary tubing into the pump tubing until it is inserted approximately 6 mm (¼ inch).
- Verify:
- Run the pump at high speed
- Confirm the tubing remains securely connected
- Ensure no leaks are present
Cause
Insufficient mechanical grip between the capillary tubing and the mixing Y connection leads to disconnection under increased pressure at high pump speeds.