Effectiveness of venous pressure measurement in detecting dislodgement of dialysis indwelling needle

Abstract

The venous pressure is monitored to detect needle dislodgement during dialysis treatment. On the other hand, there is a previous study that venous pressure is not effective enough to detect dislodgement of indwelling needles. Therefore, we examined whether the venous pressure monitoring is effective for detecting the withdrawal of the needle using the result of measuring the dynamic pressure change in the experimental circuit. As a result, if the patient's intravascular pressure was not more than 25 mmHg, it was considered that the could not be detected even if the needle dislodgment occurred. Almost of Japanese dialysis patients (89.7%) have a blood vessel used for dialysis called Arteriovenous Fistula (AVF). Since there was a previous study that the intravascular pressure of AVF was 32.6 ± 23.5 mmHg, Therefore, it was considered that needle dislodgment could not be detected sufficiently by venous pressure monitoring.