Figure 2From: Injecting drug use via femoral vein puncture: preliminary findings of a point-of-care ultrasound service for opioid-dependent groin injectors in treatmentNormal venous flow (grade 1). Duplex scan showing normal blood flow - colour flow (top half) and spectral tracing (lower half) in the left femoral vein (lcfv) of the patient in figure 1 (case study B). Note the normal, phasic venous flow with respiration (arrows).Back to article page