Graft Survival
Whether transplanted follicular units re-establish a blood supply and go on to produce hair in the recipient site.
Graft survival is whether a transplanted follicular unit re-establishes a blood supply in its new recipient site and goes on to grow hair. It is the ultimate outcome measure of a hair restoration procedure: every earlier step — extraction, storage, site creation, placement — exists to protect the graft so that as many units as possible take root and regrow.
In practice
Survival is not decided at a single moment but accumulated across the whole graft journey. A follicular unit is a small piece of living tissue that is separated from its blood supply the instant it is extracted and must endure a period outside the body before it is re-vascularised. Each phase in between adds or subtracts risk: clean extraction that avoids transection keeps the unit whole; gentle handling with fine forceps avoids crush injury; the time the graft spends out of the body, the temperature it is held at, and the storage solution it sits in all bear on the tissue's condition; and atraumatic placement at an appropriate depth and angle gives it the best chance to connect. The review of graft damage causes walks through the mechanical failure modes.
What buyers and professionals should know
The honest position is that graft survival is multi-factorial and qualitative to discuss — it is influenced by surgical technique, team skill, out-of-body time, temperature, hydration, and patient biology, and no single instrument or product determines it. Be sceptical of any supplier who attaches a survival percentage to a piece of equipment or a storage fluid. Such claims are outcome claims about a system, and the marketing number rarely carries the study conditions, sample size, or counting method that would make it interpretable. Treat survival as a goal that good specifications support rather than a figure a product delivers.
For clinics and buyers, the useful framing is control of variables. You cannot buy survival, but you can equip the process to protect it: quality punches that reduce mechanical injury, storage held at a controlled low temperature (see hypothermic graft storage), atraumatic forceps and implanters, and workflow that keeps out-of-body time short. Each is a lever on the same outcome. When evaluating equipment, ask how it reduces trauma or shortens exposure — concrete, verifiable mechanisms — rather than what survival number it promises.