Needle Compatibility:

We recommend using 18G needles. The compatible guidewire diameter range is 0.64–0.96 mm (0.025–0.038 inches). Using other needle types may alter pressure sensitivity due to variations in internal resistance.

Compatibility with Angiocath:

Yes. Insert the Angiocath into the vessel first, then reconnect the device to confirm intravascular pressure before inserting the guidewire through the dedicated port.

Vessel Safety:

No. Each auto-aspiration draws only about 0.6–0.8 cc of blood. The small volume and controlled rate reduce the likelihood of vessel collapse compared to manual aspiration.

Guidewire Insertion Criteria:

Guidewire insertion should only be attempted when there is smooth and continuous blood backflow. Minimal or absent reflux may indicate suboptimal needle placement.

Venous Pressure Indication:

Yes. The protrusion of the guidewire port indicates venous pressure above 30 mmHg. Full protrusion suggests pressure of approximately 50 mmHg, helping to identify elevated central venous pressure.

Repressing the Trigger:

You may press the trigger area again. As long as the device is not full, it will continue generating negative pressure with each press.

Backflow Validation:

Yes. If manual aspiration works, EpiFaith CV will also produce backflow. Lack of reflux may indicate incorrect needle positioning.

Trigger Use Guidance:

Continuous pressing is not recommended. You may press multiple times for confirmation, but prolonged force may interfere with plunger movement.

Troubleshooting Guidewire Insertion:

Try adjusting the needle position slightly. The needle may have moved or only partially entered the vessel. Reconfirm with a trigger press and proceed if backflow is consistent.

Insertion Port Guidance:

Protrusion indicates pressure above 30 mmHg. In most cases, guidewire insertion should be avoided unless clinically justified. If the system detects arterial entry, it will restrict guidewire passage.

Device Reusability:

EpiFaith CV allows up to three auto-aspiration attempts. After each use, clear internal blood to avoid clotting. Do not use for prolonged or repeated procedures.

Backflow Confirmation:

Yes, depending on hand positioning. In addition to visual indicators, plunger movement provides tactile feedback when blood enters the chamber.

Tray Packaging Plans:

Currently, EpiFaith CV is offered as a standalone syringe. Pre-bundled tray sets are in development and will be announced through our distribution partners once available.