ABSTRACT.Purpose: To compare intraocular pressure (IOP) readings taken using dynamic contour tonometry (DCT) with IOP readings taken with Goldmann applanation tonometry (GAT) in eyes with glaucoma or ocular hypertension. Methods: The present study included 100 eyes in 100 patients with glaucoma or ocular hypertension. After pachymetry DCT and GAT were performed. Intraocular pressures as measured with DCT and GAT were compared with one another and with central corneal thickness (CCT). Results: Mean DCT IOP measurements (20.1 ± 4.3 mmHg) were significantly (p < 0.001) higher than GAT IOP values (17.9 ± 4.7 mmHg). The mean difference between DCT and GAT measurements was 2.1 mmHg (range ) 3.4 to 9.7 mmHg). The difference followed a normal distribution. Measurements made with DCT and GAT correlated significantly with one another (Spearman's rho = 0.761, p < 0.001). Neither GAT nor DCT measurements showed a significant correlation with CCT (537 ± 39 lm, range 458-656 lm). Multivariate regression analysis has shown that the difference between DCT and GAT is influenced significantly by ocular pulse amplitude (r = ) 0.334, p = 0.001) and it is not influenced by CCT (r = ) 0.106, p = 0.292). Conclusions: In eyes with glaucoma or ocular hypertension, DCT facilitates suitable and reliable IOP measurements which are in good concordance with GAT readings. Variation in CCT cannot by itself explain the differences in measurements taken with DCT and GAT in a number of eyes.

The objective of the present study was to evaluate the workload and case-mix of the Emergency Department of a referral hospital, with the aim of determining the causes of overcrowding. The study was of a descriptive prospective design and was carried out in a 700-bed university hospital covering a population of approximately 200,000 inhabitants. The total number of patient visits to the Emergency Department and hospital admissions were recorded during one year, whereas the case-mix of patients visiting the department was evaluated during 11 consecutive on-call days using a triage scale with four categories of patient severity. During the year of the study 81,110 patients (a mean of 443 visits per on-call day) visited the department, with a hospital admission rate of 14.5%. The case-mix analysis of 3389 patients who visited the department during the 11 consecutive on-call days studied revealed that 5.7% were critically ill patients, 53.8% were patients with urgent but non-critical health problems, 30% were patients with non-urgent problems and 10.5% were miscellaneous cases, probably inappropriately visiting the department. In conclusion, the Emergency Department studied is severely overcrowded in relation to the population that it covers. A great part of this overload was directly related to non-urgent cases and inappropriate visits.