Components of the device: silicone suction cup; flexible shaft; low-profile collapsible blood flow blocking membrane. Components of the device: silicone suction cup; flexible shaft; low-profile collapsible blood flow blocking membrane. Joao Baptista Rezende-Neto et al. Trauma Surg Acute Care Open 2016;1:e000012 Published by the BMJ Publishing Group Limited. For permission to use (where not already granted under a licence) please go to http://www.bmj.com/company/products-services/rights-and-licensing/