An abstracted unit of the everyday consumables a healer needs to treat a wound of one injury level: pre-measured linen bandages, a splint of split willow, a small length of waxed suture thread on a curved needle, a scrap of boiled sponge, a dab of honey or tallow salve in a waxed-paper twist, and a measure of dried yarrow or comfrey for a poultice. Field-surgeons, barber-surgeons, monastery infirmarians, and anyone prudent enough to travel with an aid bag carry a supply by the handful, replenished at any market town.
A treatment consumes one unit of supplies per injury level being treated — a minor cut is one unit, a grievous chest wound is five. Without supplies, no meaningful treatment can be performed; a physician’s hands and training are worthless against a bleeding wound without linen to bind it and thread to close it. The supplies alone are enough for routine treatment; a Surgical Kit is required only for complicated procedures — amputations, deep internal wounds, bone-setting, and the lancing of grave abscesses.