Robotic Follicular Unit Graft Selection.

Background: The use of robotic technology to harvest grafts in a follicular unit extraction (FUE) hair transplant procedure has been available since 2011. A new capability of the robotic system is to harvest follicular units based on the number of hairs they contain to increase the hair/wound yield.

Objective: To assess the benefit of follicular unit graft selection during a robotic FUE procedure.

Rat epigastric flow-through flap as a modulated arteriovenous fistula: model for the radial artery flow-through flap in distal arterial bypass.

The authors describe a rat flap model that is useful for flow studies. It is an epigastric flow-through flap that mimics the clinical use of a radial artery flow-through (RAFT) flap that has been used as an adjunct to a distal lower extremity arterial bypass graft to improve patency when there is potential high outflow resistance. The hypotheses were that this RAFT flap serves two purposes: 1) it allows additional blood flow through the skin flap and drainage via the vena comitans to increase the blood flow through the bypass graft and help to maintain bypass graft patency; and 2) it acts as a modulating arteriovenous fistula in which the additional flow through the vena comitans of the flow-through flap fluctuates with distal arterial outflow resistance.