Channel creation (site making)
The step of opening recipient-site incisions that determine the angle, direction and depth of each implanted graft. Channel geometry is the main surgical control over how natural the final result looks.
Channel creation — site making — is the step between harvesting and implantation in which the surgeon opens every incision the grafts will occupy. Each channel fixes three things a graft can never change afterwards: the angle at which its hair will leave the skin, the direction it will point, and the depth at which it will sit. Extraction quality decides whether grafts survive; channel work decides what the survivors look like. It is the most aesthetically consequential step of the operation, and the hardest to correct once healed.
The instrument is a blade or needle selected — and often custom-cut — to match the graft calibre of the individual patient: steel slits, sapphire-tipped blades and hypodermic needles all serve, and the material argument matters far less than the sizing discipline. A channel too large lets the graft sit loose or slip deep, pitting the skin; too small forces the placing team to squeeze and manipulate tissue that should slide in cleanly. Depth control follows the same logic — too shallow and grafts dry or pop out, too deep and the surface cobblestones.
Geometry is where surgical judgement shows. Angles flatten to a few degrees at the hairline and temples, lift gradually behind, and rotate through the whorl of the crown; direction follows the native pattern the patient still carries; and distribution is deliberately irregular, so density reads as texture rather than rows. This is also where the density plan is physically executed — how many incisions each square centimetre receives, bounded by blood supply and the donor budget.
Who opens the channels is one of the most revealing questions a patient or a hiring clinic can ask. In many jurisdictions this is explicitly the surgeon’s work; in high-volume settings it is quietly delegated. DHI collapses the step into placement — the implanter needle makes the channel as it deposits the graft — which changes the workflow but not the decisions: angle, direction and depth are still chosen one insertion at a time.
Disciplined teams document the work: channel counts per zone, blade widths matched against graft sizes from the sorting bench, and photographs of the marked design before the first incision. That record is what makes results reproducible across sessions — and what makes an honest conversation possible when a result needs review.
