Comparaison in vitro des dispositifs de perfusion : précision et fiabilité du débit, régulateur versus pince à roulette du perfuseur

Comparison of the accuracy and the reliability of flow rate control: roller clamp of IV set with or without infusion control device (ICD). Type of study: experimental study. Two experimental models were created with flow rate measurements by visual counting. Model 1: assessment of the accuracy and the range of flow rates obtained with the roller clamp of two types of IV sets and one ICD. Data were analyzed with a Student test. Model 2: five series were performed: IV set with roller clamp (PS) versus IV set with ICD (PSR), with or without IV flow rate adjustment from T0 to T20 (series PS, PSR and PS4, PSR4) for an initial flow rate fixed to 14 ± 1 drops/min, were compared in pairs and analyzed with an ANOVA test. The fifth series PSRE (PSR without ICD's calibration) without adjustment of the flow rate during 20 hours. Model 1: the roller clamp of KIS1770® was better with more accuracy and best range in the IV rate adjustments than INTRAFIX PRIMELINE® (P < 0.01). The ICD had more points of adjustment than IV sets. Model 2: series without ICD had a higher variation percentage from the initial flow rate than series with ICD calibrated, with or without flow rate adjustment, from T0 to T20: P = 0.014 and P < 0.01 respectively. The PSRE series showed a deviation of 53% from the initial target at T0. The study shows that ICD provides a gain of accuracy and reliability after prior calibration during low flow rate gravity infusions for 20 h.