Variations in pain induced by venous cannulation on repeated time-points: An observational cohort study

Venous cannulation pain intensities show low intra-individual variations. Subjects with higher pain intensity during venous cannulation are prone to greater intra-individual variations. If low pain perceived this is likely to repeat. To our knowledge this has never been investigated before and has implications for using pain evaluations as proxy for sensitivity measurements but also for how we handle patients with previous pain on venous cannulation.