Prostate biopsies in men with limited life expectancy.
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CONTEXT: Authorities discourage prostate screening in men who are likely to die from causes other than prostate cancer. PRACTICE PATTERN EXAMINED: Use of prostate biopsy-a proxy for screening-in men aged 65 and older with limited life expectancy (i.e., estimated to be less than 10 years). DATA SOURCE: Five percent samples of Part A (hospital) and Part B (physician) Medicare claims for 1993 through 1997. RESULTS: 22% of all Medicare beneficiaries who underwent a prostate biopsy had a limited life expectancy, corresponding to a rate of 1420 biopsies per 100,000. This rate did not change significantly between 1993 and 1997. For men with a life expectancy greater than 10 years, the biopsy rate was 2,360 per 100,000. Among men with limited life expectancy, in the year following the biopsy, 1.6% had radical prostatectomy and 2.3% had external-beam radiation. Thirty-nine percent were hospitalized. CONCLUSION: A substantial proportion of prostate biopsies are being performed in men with a life expectancy of less than 10 years. These men are unlikely to benefit from the biopsy or subsequent treatment. (+info)
Coronary angiography as a prognostic tool.
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Coronary angiography was introduced into clinical practice more than 40 years ago revolutionizing the clinical understanding of the coronary artery disease and setting the stage for all the modern treatments such as coronary bypass surgery (CABG), percutaneous coronary angioplasty (PTCA), and thrombolysis. Coronary angiography has well-known pitfalls and limitations in the detection of coronary atherosclerosis. It is not very unusual to see in the routine clinical practice that the coronary angiography is less well appreciated as a prognostic tool. One reason for this may be the traditional teaching of the coronary angiography that favors the technical aspects of the catheterization and the radiographic interpretation skills. In this paper, the prognostic significance of coronary angiographic findings is reviewed and the clinical issues encountered in daily practice are highlighted. (+info)
Primary staging and follow-up in melanoma patients--monocenter evaluation of methods, costs and patient survival.
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In a German cohort of 661 melanoma patients the performance, costs and survival benefits of staging methods (history and physical examination; chest X-ray; ultrasonography of the abdomen; high resolution sonography of the peripheral lymph nodes) were assessed at initial staging and during follow-up of stage I/II+III disease. At initial staging, 74% (23 out of 31) of synchronous metastases were first detected by physical examination followed by sonography of the lymph nodes revealing 16% (5 out of 31). Other imaging methods were less efficient (Chest X-ray: one out of 31; sonography of abdomen: two out of 31). Nearly 24% of all 127 first recurrences and 18% of 73 second recurrences developed in patients not participating in the follow-up programme. In follow-up patients detection of first or second recurrence were attributed to history and physical examination on a routine visit in 47 and 52% recurrences, respectively, and to routine imaging procedures in 21 and 17% of cases, respectively. Lymph node sonography was the most successful technical staging procedure indicating 13% of first relapses, but comprised 24% of total costs of follow-up in stage I/II. Routine imaging comprised nearly 50% of total costs for follow-up in stage I/II and in stage III. The mode of detecting a relapse ('patient vs. doctor-diagnosed' or 'symptomatic vs asymptomatic') did not significantly influence patients overall survival. Taken together, imaging procedures for routine follow-up in stage I/II and stage III melanoma patients were inefficient and not cost-efficient. (+info)
Comparison of admission perfusion computed tomography and qualitative diffusion- and perfusion-weighted magnetic resonance imaging in acute stroke patients.
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BACKGROUND AND PURPOSE: Besides classic criteria, cerebral perfusion imaging could improve patient selection for thrombolytic therapy. The purpose of this study was to compare quantitative perfusion CT imaging and qualitative diffusion- and perfusion-weighted MRI (DWI and PWI) in acute stroke patients at the time of their emergency evaluation. METHODS: Thirteen acute stroke patients underwent perfusion CT and DWI or PWI on admission. The size of infarct and ischemic lesion (infarct plus penumbra) on the admission perfusion CT was compared with that of the MR abnormalities as shown on the DWI trace and on the relative cerebral blood volume, cerebral blood flow, time to peak, and mean transit time maps calculated from PWI studies. RESULTS: The most significant correlation was found between infarct size on the admission perfusion CT and abnormality size on the admission DWI map (r=0.968, P<0.001). A significant correlation was also observed between the size of the ischemic lesion (infarct plus penumbra) on the admission perfusion CT and the abnormality size on the mean transit time map calculated from admission PWI (r=0.946, P<0.001). Information about cerebral infarct and total ischemia (infarct plus penumbra) carried by both imaging techniques was similar, with slopes of 0.913 and 0.905, respectively. CONCLUSIONS: An imaging technique may be helpful in the identification of cerebral penumbra in acute stroke patients and thus in the selection of patients for thrombolytic therapy. Perfusion CT and DWI/PWI are equivalent in this task. (+info)
Impact of end user involvement in implementing guidelines on routine pre-operative tests.
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OBJECTIVES: To assess the impact of health professionals' involvement in the implementation of practice guidelines aimed at reducing the use of pre-operative tests in patients at low anaesthetic risk undergoing elective surgery. INTERVENTION: A 6 month (September 1997 to February 1998) strategy based upon organization of local meetings involving health professionals from six hospitals of Canton Ticino (Switzerland). DESIGN: Observational study (pre/post) of pre-operative test utilization between March 1996 and December 1998. SUBJECTS AND METHODS: A total of 17,978 patients admitted for elective surgery over the study period. The latter was modelled in six intervals, three before (baseline), one during, and two after (adoption) guidelines implementation, respectively. For each time interval the proportion of patients undergoing pre-operative tests was estimated. Multilevel logistic regression analysis was used to assess patient likelihood [expressed as the odds ratio (OR)] of undergoing a diagnostic test in each period, using the implementation interval as the reference category. MAIN OUTCOME MEASURE: Change in patient probability of undergoing pre-operative tests in the adoption interval. RESULTS: Adoption of the recommendations was associated with 81% [OR = 0.19; 95% confidence interval (CI) 0.15-0.23] reduction of patient probability of undergoing coagulation test, 73% (OR = 0.27; 95% CI 0.23-0.33) for glycaemia, 62% (OR = 0.38; 95% CI 0.33-0.44) for azotaemia, 57% (OR = 0.43; 95% CI 0.36-0.51) for chest X-ray, 49% (OR = 0.51; 95% CI 0.44-0.60) for creatinemia, and 43% (OR = 0.57; 95% CI 0.48-0.69) for ECG. Overall, these findings corresponded to a cost saving of 67,890 Swiss francs (US$42,000) for the last quarter under study. CONCLUSIONS: This study indicates that an implementation strategy based upon direct involvement of end users in the identification of possible barriers to change can be successful in promoting the use of practice guidelines. (+info)
Preventive health care measures before and after start of renal replacement therapy.
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OBJECTIVE: To describe utilization of preventive health care measures in patients with chronic kidney disease (CKD), both in the year prior to onset of renal replacement therapy (RRT), and in the first year of RRT. METHODS: We identified a large cohort of patients with CKD in the New Jersey Medicaid and Medicare programs with fixed enrollment into the cohort at 1 year prior to RRT. We applied commonly used quality assurance instruments (Health Plan Employer Data and Information Set measures) and defined levels and correlates of use of preventive care measures before and after RRT. These included mammography, Pap smear testing, prostate cancer screening, diabetic eye exams, and glycosylated hemoglobin testing (HbA1c). We employed logistic regression models with adjustment for age, race, gender, comorbidity, timing of first nephrologist contact, socioeconomic status, and calendar year of first RRT. RESULTS: Overall, screening rates were low with the exception of diabetic eye exams. Prostate cancer screening, diabetic eye exams, and HbA1c testing were performed less often after onset of RRT compared to the year before (P < .05). Although screening rates before RRT improved considerably over the period of observation for these measures (P < .05), this was not the case once patients were on RRT. CONCLUSIONS: Preventive health care interventions remain underutilized among RRT patients. Greater attention to such preventive measures could lead to significant improvements in the health status of such vulnerable patients. Thus, quality improvement of the general health care for patients on RRT should become a priority in renal health policy. (+info)
Assessing the usefulness of anticardiolipin antibody assays: a cautious approach is suggested by high variation and limited consensus in multilaboratory testing.
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An anticardiolipin antibody (ACA) assay has become a laboratory standard for the detection of antiphospholipid antibodies. We evaluated data from a quality assurance program to assess ACA assay usefulness. Cross-laboratory (n = 56) testing of 12 serum samples yielded interlaboratory coefficients of variation (CVs) for lgG ACA and IgM ACA that were higher than 50% in 17 (71%) of 24 cases. The situation for testing consensus was of equal concern. Total consensus occurred in 6 (25%) of 24 cases. General consensus (interlaboratory agreement, 90% or more) was obtained in 10 (42%) of 24 cases. In the majority of test cases, laboratories could not agree on whether a serum sample tested was ACA-positive or ACA-negative. Differing method-related issues also were evident; some methods tended toward higher or lower ACA values. Method-based majority consensus differed from participant majority consensus on many test occasions. Exceedingly high interlaboratory result variation, combined with a general lack of test result grading consensus and method-based variation, indicate that a cautious clinical approach toward laboratory findings is prudent. Laboratory tests should be repeated at least once before making a clinical diagnosis of any anti-phospholipid syndrome-like disorder. (+info)
Hematuria: an algorithmic approach to finding the cause.
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Many conditions can cause hematuria, but the differential diagnosis can be simplified with a systematic approach. We discuss the common causes of hematuria and how to evaluate it. (+info)