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      Avaliação da necessidade da solicitação de exames complementares para pacientes internados em unidade de terapia intensiva de hospital universitário Translated title: Laboratory exams necessity for patients admitted to an university hospital intensive care unity

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          Abstract

          JUSTIFICATIVA E OBJETIVOS: O aumento progressivo nos recursos diagnósticos tem aumentado a qualidade e a quantidade dos exames de laboratório realizados nas Unidades de Terapia Intensiva (UTI). A influência deste aumento sobre a morbidade e mortalidade não está bem definida. O objetivo deste estudo foi avaliar a freqüência da solicitação de exames na UTI do HU e verificar se houve ou não relação entre a quantidade de exames solicitados e a idade dos pacientes, o seu desfecho e a gravidade das doenças. MÉTODO: Coorte prospectiva, com abordagem quantitativa. Foram analisados os exames dos pacientes internados na UTI, dos meses de julho a dezembro, 2005. Foram coletados dados clínicos e demográficos dos pacientes e quantificados diariamente os exames mais freqüentemente solicitados na UTI. Seqüencialmente a média diária de exames foi calculada para todo o período de internação. Para fins de análise os pacientes foram divididos obedecendo três critérios: faixa etária, desfecho de saída da UTI e gravidade. Para a análise estatística foram utilizados os testes Exato de Fisher, Qui-quadrado e ANOVA. RESULTADOS: Foram admitidos 113 pacientes durante o período de estudo. A taxa média foi de 11,5 exames por dia de internação. Estes valores não apresentaram diferença estatística quando comparados entre os pacientes com idade acima ou abaixo de 60 anos, entre os que sobreviveram e os que foram a óbito e entre aqueles que tiveram taxa de óbito estimada em menos que 50% ou mais que 50%. CONCLUSÕES: Os exames solicitados não guardam correlação clínica e prognóstica com sua solicitação. Não houve estatística significativa quando a taxa diária média de exames foi relacionada à idade do paciente, ao desfecho e à gravidade.

          Translated abstract

          BACKGROUND AND OBJECTIVES: The progressive increasing diagnostic resources had influenced the quality and quantity of laboratory exams. It is not clear if the amount of exams performed influence the morbidity and mortality in the ICU patients. The purpose of this study was to appraise the frequency of the most ordering tests in the ICU of HU-UFSC and to check if there was connection between them and the age, the destiny until the ICU discharge and the estimate severity of their diseases. METHODS: Prospective cohort study with qualitative approach. The blood samples of admitted patients were analyzed, from July to December 2005. Clinical and demographic features were collected and the most frequently blood-samples were quantified per day. In the sequence the daily rate of exams were calculated during all the admission period. The patients were analyzed according to three criterions: age, destiny until the ICU discharge and estimate severity according to APACHE II index. Data were analyzed using Fisher Exact, Chi-square and ANOVA tests. RESULTS: One hundred and thirteen patients were enrolled to this study. The average test-ordering was 11.50 per day. These numbers didn't have statistical difference when they were compared between survivor and non-survivor patients, and between those whose the death estimated tax was bigger or smaller than 50 per cent. CONCLUSIONS: The test-ordering didn't show clinical and prognostic relation to its request. There were no statistic relation between the patient's age, ICU discharge and the estimate severity.

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          Most cited references22

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          Evaluating laboratory usage in the intensive care unit: patient and institutional characteristics that influence frequency of blood sampling.

          To develop a predictive equation to estimate the frequency of blood drawing for intensive care unit (ICU) laboratory tests and to evaluate variations in ICU blood sampling practices after adjusting for patient and institutional factors. Prospective, inception, cohort study. Forty-two ICUs in 40 hospitals, including 20 teaching and 17 nonteaching ICUs. A consecutive sample of 17,440 ICU admissions, in which 14,043 blood samples were drawn for laboratory testing on ICU days 2 to 7. None. Patient demographic, physiologic, and treatment data were obtained on ICU day 1; the type and number of blood samples for laboratory testing were recorded on ICU days 1 to 7. In the 42 ICUs, a mean of 16.2 blood samples were drawn for tests on ICU days 2 to 7, but varied between 23 samples in the teaching ICUs and 9.9 samples in nonteaching ICUs. Using only ICU day 1 patient data, we predicted the subsequent number of samples drawn on ICU day 2 (R2 = .26 across individual patients) and on ICU days 2 to 7 (R2 = .26 across individual patients). The most important determinants of the number of blood samples drawn on ICU days 2 to 7 were the ICU day 1 Acute Physiology Score and admission diagnosis. After controlling for patient variables, hospital teaching status, number of beds, and location in the East and South were significantly (p < .05) associated with increased blood sampling on ICU day 2 and on ICU days 2 to 7. More frequent use of an arterial cannula and mechanical ventilation were also associated with increased blood sampling on subsequent days. The ability to adjust for patient and institutional variables and to predict the number of blood samples drawn for laboratory tests can allow ICUs to compare their practices with those of other units. When integrated into a continuous quality improvement process, this information can be used to identify and focus on opportunities for improving blood conservation and reducing excessive diagnostic testing.
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            Test-ordering strategy in the intensive care unit.

            The objective of this study was to assess the effect of an intervention designed to reduce utilization of portable chest x-rays (CXRs) in the intensive care unit (ICU). In this prospective observational study, patients representing 2734 consecutive admissions over a 35-month period were studied. Data collected from the comprehensive ICU database included patient days, ventilator days, number of admissions to the unit, number of CXRs ordered, costs for CXR, Acute Physiology and Chronic Health Evaluation II (Apache II) scores, ICU length of stay (LOS), length of mechanical ventilation, inadvertent extubations from mechanical ventilation, and reintubation within 48 hours of planned extubation. There was a 22.5% reduction in the rate CXR utilization during the study period, resulting in a $109,968 cost savings, and these savings were not associated with any adverse clinical outcomes.
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              Physicians' perceptions of laboratory costs in the intensive care unit. Hamilton Regional Critical Care Group.

              D J Cook (1992)
              Our objective was to determine the extent to which Intensive Care Unit (ICU) physicians are aware of charges for commonly used blood tests. We also wished to ascertain ICU physicians' perception of their motivation for, and appropriateness of, test ordering. Attending physicians and Internal Medicine residents in four university-affiliated ICUs in Hamilton were surveyed using a self-administered questionnaire. The response rate for the questionnaire was 91%. Physicians varied widely in their estimates of charges for ten laboratory tests. On average, residents tended to underestimate charges, while attending physicians sometimes underestimated, and sometimes overestimated. When all ten tests were considered, the mean estimates of the housestaff were lower than the ICU attending physicians (p < 0.001). Overall, attending estimates were 29.5% higher. Over 85% of physicians felt that too many blood tests were being performed. Physicians perceived that they pay insufficient attention to the risk of anemia and to issue of cost. Their feeling that test ordering in the ICU is excessive suggests that they may be open to modifying their practice. Given the large proportion of hospital resources allocated to the intensive care unit, interventions to decrease test ordering are warranted.
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                Author and article information

                Contributors
                Role: ND
                Role: ND
                Role: ND
                Role: ND
                Journal
                rbti
                Revista Brasileira de Terapia Intensiva
                Rev. bras. ter. intensiva
                Associação de Medicina Intensiva Brasileira - AMIB (São Paulo )
                1982-4335
                December 2006
                : 18
                : 4
                : 385-389
                Affiliations
                [1 ] Universidade de São Paulo Brazil
                [2 ] Universidade Federal de Santa Catarina Brazil
                [3 ] Universidade Federal de Santa Catarina Brazil
                [4 ] Universidade Federal de Santa Catarina Brazil
                Article
                S0103-507X2006000400011
                10.1590/S0103-507X2006000400011
                58b2fd89-2137-45b1-9688-f49bdf3e38d0

                http://creativecommons.org/licenses/by/4.0/

                History
                Product

                SciELO Brazil

                Self URI (journal page): http://www.scielo.br/scielo.php?script=sci_serial&pid=0103-507X&lng=en
                Categories
                CRITICAL CARE MEDICINE

                Emergency medicine & Trauma
                Intensive Care Medicine,test-ordering,treatment costs,custo tratamento,exames complementares,Medicina Intensiva

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