The value of 64-detector row computed tomography for the exclusion of pulmonary embolism.

Recently, a diagnostic strategy using a clinical decision rule, D-dimer testing and spiral computed tomography (CT) was found to be effective in the evaluation of patients with clinically suspected pulmonary embolism (PE). However, the rate of venous thromboembolic complications in the three-month follow-up of patients with negative CT was still substantial and included fatal events. It was the objective to evaluate the safety of withholding anticoagulants after a normal 64-detector row CT (64-DCT) scan from a cohort of patients with suspected PE. A total of 545 consecutive patients with clinically suspected first episode of PE and either likely pre-test probability of PE (using the simplified Wells score) or unlikely pre-test probability in combination with a positive D-dimer underwent a 64-DCT. 64-DCT scanning was inconclusive in nine patients (1.6%), confirmed the presence of PE in 169 (31%), and ruled out the diagnosis in the remaining 367. During the three-month follow-up of the 367 patients one developed symptomatic distal deep-vein thrombosis (0.27%; 95%CI, 0.0 to 1.51%) and none developed PE (0 %; 95%CI, 0 to 1.0%). We conclude that 64-DCT scanning has the potential to safely exclude the presence of PE virtually in all patients presenting with clinical suspicion of this clinical disorder.

[Criteria for choosing health care facilities for prenatal care in Pelotas, RS, Brazil]. / Critérios de escolha de postos de saúde para acompanhamento pré-natal em Pelotas, RS.

OBJECTIVE: To describe the prenatal care delivered to a representative sample of mothers, identifying the health care facility they attended and to explore the reasons that led them to choose that specific health facility. METHOD: A cross-sectional study was conducted at four maternity hospitals in Pelotas, in Southern Brazil, from March to April 1997. A total of 401 mothers were interviewed at the hospital, immediately after delivery. RESULTS: The majority of mothers (51%) were followed up at a primary health care facility (PHCF). The main reported reason for choosing a PHCF was its geographic accessibility (46.8%). For 85% of the mothers, the nearest health service was a PHCF. However, 52.2% of them did not attend the consultations at this setting mainly because of a supposed low quality care (37.4%). Except for immunization with tetanus toxoids, all other usual prenatal care procedures recommended by the local health ministry, including promotion of breastfeeding, were performed less frequently at the PHCF than in other health care settings. CONCLUSION: Given the high coverage of the public prenatal care program, efforts should be made to improve the quality of care delivered to pregnant women, mainly by encouraging health professionals, especially doctors, to follow the established guidelines.