Fatores que comprometem a adequabilidade da amostra citológica cervical / Factors that compromise the adequacy of cytological cervical sample

O exame citopatológico é o método mais difundido mundialmente para o rastreamento do câncer do colo do útero e de suas lesões precursoras, porém sua vulnerabilidade a erros de coleta e preparação da lâmina e a subjetividade na interpretação dos resultados podem comprometer a sua sensibilidade e especificidade. Os fatores relacionados à adequabilidade da amostra têm sido considerados responsáveis por resultados falso-negativos, como a não representação de células endocervicais e/ou zona de transformação, a presença de sangue, o infiltrado leucocitário e os artefatos de fixação. Esses fatores retratam os erros da coleta e contribuem para os resultados falso-negativos relacionados a erros de escrutínio e de interpretação. Dessa forma, considerando esses fatores que podem comprometer a adequabilidade da amostra citológica cervical, o presente artigo revisa a literatura e discute estudos sobre o tema.

The cytopathological test is the most widely used method worldwide for screening of cervical cancer and its precursor lesions, but their vulnerability to errors of collection, preparation of the blade and subjectivity in the interpretation of results may jeopardize its sensitivity and specificity. Factors related to suitability of the sample have been considered as responsible for false-negative results, such as the non-representation of endocervical cells and/or transformation zone, the presence of blood, leukocyte infiltration and artifacts of attachment. These factors usually portray the errors of collection, which may also lead to false-negative results associated with scrutiny and interpretation errors. Therefore, considering the factors that may compromise the cervical cytological sample adequability, this article reviews the literature and brings a discussion on studies on the subject.

Blood collection procedures in hematology: knowledge and practice among laboratory personnel.

Blood collection is an important preanalytical component of haematological testing. This questionnaire based study was conducted on laboratory personnel to elicit their knowledge and practice regarding blood collection procedures for haematological testing. Questionnaire comprised of 37 multiple choice questions, of which 10 questions each were related to essential and desirable knowledge, 10 to practice and 7 to educational and job profile. Ninety four laboratory personnel participated in the study. Analysis was done on SPSS software. Percentages of unsatisfactory scores were 42.6%, 4.3%, 17% and 6% in the essential knowledge, desirable knowledge, practice and total scoring respectively. 91.5%, however, had a satisfactory total score. Importance needs to be given to blood collection procedures both, individually and collectively. The study highlights the deficient areas which need to addressed by all laboratorians. Such studies should also be conducted among nursing and resident staff- the other groups concerned with blood collection.

Manual de normas de bioseguridad / Biosafety standards manual

Preparado para el personal de laboratorios quienes están sometidos al riesgo de adquirir accidentalmente una infección o sufrir una agresión química o física. Tiene por objeto poner al alcance del personal de salud un conjunto de normas que permitan reducir el riesgo de accidentes en el edificio o ambiente donde funcionan los laboratorios