Figure 6From: Injecting drug use via femoral vein puncture: preliminary findings of a point-of-care ultrasound service for opioid-dependent groin injectors in treatmentNon-compressible vein (B mode). B-mode image of a non-compressible left femoral vein (lsfv, see arrow) behind the femoral artery (lsfa) in the thigh of the patient in figure 5 (case study A), indicative of extension of the blood clot to the femoral vein in the mid-thigh.Back to article page