Author: Glossary
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Flatness
Resonance heard on percussion over solid organs or when there is fluid in the thoracic cavity.
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Spasmodic flatfoot
Flatfoot in which the foot is held everted by spasmodic contraction of the peroneal muscle.
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Flash method
A means of pasteurizing milk by rapidly raising its temperature to 178°F (80.1°C), maintaining it there for a few minutes, and rapidly chilling it until the temperature is 40°F (4.4°C).
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Tube flap
A variety of pedicle flap which is fashioned into a tubular configuration.
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Periodontal flap
A section of soft tissue surgically separated from underlying bone and removed or repositioned to eliminate periodontal pockets or to correct mucogingival defects.
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Jump flap
A skin flap moved from place to place by successively cutting one end and attaching it to a new site once vascularity is established on the stationary portion.
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Island flap
A skin flap or myocutaneous tissue in which the edges are free but the center is attached and contains the vascular supply.
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Amputation flap
A flap of skin used to cover the end of a part left after an amputation.
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Flag sign
A peculiar change in hair color in which the hair becomes discolored in a band perpendicular to its long axis. This is seen in kwashiorkor and indicates a period of severe malnutrition.
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Fixer
A reagent that stops the development of a radiographic image, removes undeveloped silver halide crystals, and hardens the emulsion. The typical fixer consists of a clearing agent, preservative, hardener, and acidifier.