What is the acceptable range for normal CVAD pressures during a flush?

• A. Between 10 to 15 mmHg
• B. Usually less than 20 mmHg when flushing
• C. Above 25 mmHg
• D. Exactly 30 mmHg

Answer: (B)

The acceptable range for normal central venous access device (CVAD) pressures during a flush is usually less than 20 mmHg when flushing. This range indicates that the pressure is within a normal physiological limit, ensuring that the flow of fluids through the CVAD is effective without causing complications such as vessel damage or discomfort to the patient.

Flushing at pressures above this level could signal resistance in the catheter or access site, possibly due to a thrombus or other obstruction. If pressure exceeds 20 mmHg during flushing, it may prompt further assessment of the device to ensure that it is functioning properly and safely. Keeping flush pressures under 20 mmHg helps prevent unnecessary strain on both the catheter and the vessel it resides in, maintaining the safety and integrity of the central venous access.