Figure 11From: Injecting drug use via femoral vein puncture: preliminary findings of a point-of-care ultrasound service for opioid-dependent groin injectors in treatmentNo blood flow, very severe damage (grade 4). Dual-frame image from a 37-year old groin injector (see case study E). The left femoral vein (lcfv) is small and occluded by an echogenic material (organised blood clot). Note the absence of post-acoustic shadow behind the vein (arrows). The damage was graded as very-severe (grade 4).Back to article page