Skip to main content

Humby Dermatome

The Humby dermatome — named for British plastic surgeon John Humby (1930s) — is the classic handheld manual dermatome. A reusable metal handle accepts disposable blades, and the entire harvest depends on the surgeon's technique rather than a power source.

Design​

  • Stainless steel handle (reusable)
  • Disposable blade (Watson, Bard-Parker, or branded blade)
  • Depth adjustment by a calibrated roller or screw mechanism
  • Width fixed by the blade length (typically 2" / 5 cm)

Technique​

  • Surgeon-dependent — pressure, angle, and draw speed all control thickness
  • Requires skilled assistance to hold the donor skin flat and under tension (the "cheese-slicer" technique)
  • Mineral oil lubrication essential
  • Slow, steady draw — inconsistent speed is the main source of ragged grafts

When It's Chosen Over Powered Dermatomes​

  • Limited-resource settings — no medical air or reliable electricity
  • Low-volume centers where purchase of a powered dermatome is not justified
  • Small grafts where setup of a powered device is overkill
  • Fournier's debridement in low-resource regions — the Humby remains an important tool globally

Variants​

  • Silver dermatome — a refined Humby variant with improved ergonomics
  • Braithwaite dermatome — British variant with slight modifications
  • Watson modification — disposable-blade adaptation

Limitations​

  • Thickness variability — hand-operated cuts are inherently less uniform than powered cuts
  • Smaller grafts — practical width limited by manual draw mechanics
  • Longer learning curve than powered dermatomes

See also: Zimmer Air Dermatome, Padgett Dermatome, Goulian Dermatome.