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Pap smearPapanicolaou test, pap test Gynecology A test in which cells from the uterine cervix and endocervix are sampled, spread on a glass slide, stained, and interpreted by a cytotechnologist or pathologist based on the Bethesda System Abnormal values The PS is the 'gold standard' method for early detection of HPV, herpes, trichomonad infections, CIN/dysplasia, cervical CA Accuracy PS interpretation is a subjective art based on experience of the screening cytotechnologist or pathologist; in good labs, error rate–false negative is 5%–15%. See Bethesda System. Cf Papanicolaou classification.
smear(smer) [Old English. smerian, to anoint]
Procedure: The slide must be grease-free. It is cleaned with alcohol, rinsed in warm water, and wiped clean with a lint-free towel or lens paper.A small drop of blood is placed on the slide; the end of another slide (spreader slide) is placed against the first slide at a 45° angle and pulled back against the drop of blood so that the drop spreads between the point of contact of the two slides. Then the spreader slide is pushed forward against the first slide; the blood will form an even, thin smear. The slide is dried by waving it in the air; it should not be heated. The blood smear is covered with Wright's stain and allowed to stand 2 min. An equal amount of distilled water or buffer solution is added and mixed uniformly. It is allowed to stand 5 min. The stain is gently washed off and the slide is allowed to dry.