Validating a Simplified Lung Ultrasound Protocol for Detection and Quantification of Pulmonary Edema in Patients With Chronic Kidney Disease Receiving Maintenance Hemodialysis.

OBJECTIVES: Pulmonary edema is a common clinical problem and lung ultrasound (LUS) presents an efficient method for evaluating this pathology. This study aims to investigate if a clinically efficient LUS protocol can quantify the level of extravascular lung fluid in patients receiving hemodialysis, and to develop a simplified B-line scoring system based on this protocol. METHODS: A simple 8-area LUS approach was used for the assessment of the extravascular fluid status in patients before, during, and after receiving hemodialysis. The LUS assessments were compared to the amount of removed fluid over time. To determine the best B-line score system, different scorings for each zone were tested in a linear mixed model with pseudo R-square model fit against removed fluid. The B-line score was further validated through correlations with changes in oxygen saturation, grade of dyspnea, and body weight over time. RESULTS: A total of 53 patients were included and examined on 108 hemodialysis occasions. Median fluid removal was 2.3 L. The B-line score model with best fit was a score of 0 points in a zone with 0 or 1 B-lines, 1 point with 2 or 3 B-lines, 2 points with 3 or more B-lines, and 3 points with any interstitial confluence. Using this B-line score, we found a significant association with amount of removed fluid, oxygen saturation, grade of dyspnea, and change in body weight. CONCLUSION: A straightforward protocol for LUS and B-line score system was shown valid for quantification of pulmonary edema and fluid removal in hemodialysis patients. The scoring system developed here can be useful also in other patient groups, but this requires further validation.

Is frequent attendance a persistent characteristic of a patient? Repeat studies of attendance pattern at the family practitioner.

OBJECTIVE: To assess the extent of frequent attendance as a persistent characteristic of patients by repeat studies of attendance at a health centre. DESIGN: A follow-up of frequent attenders and compared patients in 1991 among frequent attenders in 1996. SETTING: Mariehem health centre in Umeå in northern Sweden providing care for 10,500 and 12,000 inhabitants in 1991 and 1996, respectively. SUBJECTS: Frequent attenders, defined as patients who had at least 5 consultations with physicians during 1 year at the health centre, compared to attenders who had between 1 and 4 consultations in 1991 and 1996. RESULTS: The proportion of people who lived in the area and consulted a doctor at the health centre at least once during 1 year increased from 40.0% in 1991 to 45.2% in 1996. The number of frequent attenders increased from 179 to 303 and they took 15% and 20% of all consultations in 1991 and 1996, respectively. Twenty-five patients (21 females and 4 males) were identified as frequent attenders in both years. CONCLUSION: With the exception of a small group of patients, mostly females, frequent attendance seems not to be a persistent characteristic of patients.