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Fixed loop instruments designed to deliver very accurate small volume (e.g., 1, 10 microliters) samples during clinical laboratory procedures. These instruments typically consist of a manual, handheld instrument made of a metal alloy (e.g., platinum-iridium, nickel-chromium), rigid, metallic wire or plastic loop attached to a slender handle. Instruments including metal loops are usually reusable, while those with plastic loops are usually disposable. Inoculating fixed loop instruments are used in clinical laboratories and in the field for bacterial inoculation (e.g., accurate inoculums volume to culture media), as well as in procedures such as sampling, serial dilutions, and urine counts.
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