Performance of the PT100 noncontact tonometer in healthy eyes

Turki M AlMubradCornea Research Chair, Department of Optometry, College of Applied Medical Sciences, King Saud University, Riyadh, Kingdom of Saudi ArabiaBackground: The purpose of this study was to assess the repeatability and reproducibility of the PT100 noncontact tonometer and to compare its consistency with the Goldmann applanation tonometer (GAT) in measuring intraocular pressure (IOP).Methods: Triplicate IOP measurements were obtained on two separate occasions using the PT100 and GAT from randomly selected eyes in 66 healthy volunteers aged 22 ± 1 years. The repeatability and reproducibility of each techniques was assessed. Agreement between the techniques was statistically quantified using intrasession repeatability for each technique as the basis for comparison.Results: Both techniques returned equal IOP values in the first measurement session (15 ± 3 mmHg). The second session showed a mean difference in average IOP (1 ± 0.71). The 95% limits of agreement between the techniques were –5.2 to 5.5 mmHg and –4.0 to 4.7 mmHg (sessions 1 and 2, respectively). These mean differences were not statistically significant (P > 0.05, paired t-test), with the PT100 underestimating IOP measurement by 1.00 mmHg. The mean intrasession IOP for GAT sessions 1 and 2 was 0 ± 0.90 mmHg and 0.04 ± 1.06 mmHg, respectively, and the corresponding mean IOP measurement difference for the PT100 was –0.06 ± 0.96 and –0.39 ± 0.94 mmHg (sessions 1 and 2, respectively; P > 0.05, paired t-test). Repeatability coefficients for the GAT IOP measurements were 1.8 mmHg and 2.1 mmHg for sessions 1 and 2, while the PT100 repeatability coefficient was 1.9 mmHg and 1.8 mmHg for sessions 1 and 2, respectively. The intrasession repeatability coefficient of both techniques for test–retest differences were within ±5 mmHg.Conclusion: The PT100 noncontact tonometer produced greater repeatability than the GAT in assessment of IOP, whereas GAT resulted in more reproducible results. Both techniques showed a close level of agreement on comparison, with the PT100 underestimating IOP measurement by 1.0 mmHg only, although this was not clinically or statistically significant. Of importance is that the IOP measurements using these techniques could be interchangeable in the IOP range studied here.Keywords: Goldmann applanation tonometer, intraocular pressure, Reichert PT100, noncontact tonometer, repeatability, reproducibilit

Forme atypique d’une maladie de Lyme

La maladie de Lyme est une zoonose qui se manifeste essentiellement par des signes cutanés, articulaires, neurologiques et cardiaques. Elle peut exceptionnellement mimer une dermatomyosite. Nous rapportons l'observation d'une patiente âgée de 37 ans qui a présenté des myalgies et un érythroedème de la face et en péri-orbitaire. Une dermatomyosite a été fortement suspectée devant une élévation des enzymes musculaires. Elle a été traitée par une corticothérapie à forte dose. L'évolution a été marquée par l'aggravation des myalgies et l'apparition d'un déficit musculaire. Elle a été alors hospitalisée dans notre service. Les enzymes musculaires étaient élevées. L'électromyogramme était sans anomalies. Le bilan immunologique était négatif. Une enquête infectieuse a été réalisée retrouvant une sérologie de Lyme positive. Après administration d'une antibiothérapie adaptée, l'évolution était bonne avec disparition du tableau clinico-biologique de dermatomyosite. La précocité du diagnostic et l'instauration d'un traitement efficace permet d'éviter des complications graves

Difficulté diagnostique d’une tuberculose laryngée isolée chez une femme diabétique

La tuberculose laryngée isolée est rare. Elle peut mimer une tumeur maligne retardant le diagnostic et aggravant le pronostic. Le terrain diabétique favorise la survenue des infections notamment la tuberculose dans sa forme sévère. Nous rapportons l'observation d'une patiente diabétique de type 2, âgée de 51 ans, hospitalisée pour une fièvre prolongée, une dysphonie et un diabète déséquilibré. Les hémocultures étaient négatives. L'examen laryngoscopique a confirmé un aspect érythémateux et épais des deux cordes, une lésion ulcérée peu profonde de l'hémilarynx gauche et une végétation érythémateuse de 5 mm de diamètre. L'examen histologique a révélé des granulomes épithéloïodes et giganto-cellulaires avec une nécrose caséeuse évocateurs de la tuberculose. La culture sur milieu de lobstein de tissus biopsiés à partir des cordes vocales a été positive. Aucun autre foyer tuberculeux n'a été retrouvé. Le traitement par une combinaison de l'isoniazide, la rifampicine, l'éthambutol, la pyrazinamide a permis une résolution de symptôme

Influence of Tokar Gap wind jet on latent heat flux of Central Red Sea: empirical orthogonal function approach

The aim of this study was to investigate the main factors that influence the latent heat fluxes (LHF) in theTokar Gap in the central part of the Red Sea. From 2000 to 2020, ERA5 reanalysis data on summer months ofthe Central Red Sea were used to match the time when the Tokar Wind Jet appeared. The diurnal variabilityof the Tokar Gap peaks in the early morning. The time series data of the wind speed showed that the TokarWind Jet appeared from July to August. The empirical orthogonal functions (EOF) analysis method was usedto determine the modes of LHF variabilities. The sum of the first two modes of variability explained ~ 90.8% ofthe total variance. The first mode explained 80.8%, whereas the second mode represented approximately 9.9%.To examine the contribution of sea surface temperature (SST) and wind speed to the first two EOF principalcomponents, the correlation coefficient and determination coefficient were applied. The results showed that SSThad a CC of 0.90 and a DC of 81.99%, whereas wind speed showed a CC of 0.35 and a DC of 12.80%. Theseresults may be explained by the strong link between SST and the specific humidity differences of saturation andactual vapor pressure. Partial correlation results indicate that there is an indirect relation between wind and LHF.In this study SST was the dominant factor, influencing LHF variability in the study area

Enhanced Read Range Tattoo RFID Tags

Transfer Tattoo RFID tags are described for person locating scenarios. The technology considered is Radio Frequency Identification (RFID) at the UHF Band where it is possible to obtain wireless connection over distances of several meters using passive, or battery assisted transfers. The tags have the profile of tattoos and can be mounted straight onto the skin. Promising results for enhancing read distances, possibly to tens of meters, have been obtained using very thin battery technologies

Taxonomic revision of the genus Scorpiurus L. (Fabaceae)

The morphological and anatomical characteristics of different parts were utilized to reassess the taxonomic status in Scorpiurus L. species naturally growing in Egypt. There were significant differences among the studied species of plants and hence the results clearly showed two distinct species. Based on the studied morphological and anatomical differences S. muricatus L. is differentiated into three different varieties. These are muricatus L., laevigatus (Sibth. & Sm.) Boiss. and subvillosus (L.) Fiori. An artificial key to both species and varieties are provided

Effect of Reaction Time on the Blue Shift of Chemically Created Silver Nanoparticles

The structural properties of (Ag-NPs) nanoparticles prepared by the chemical method were examined using (XRD) diffraction. Additionally, the optical properties were tested using a UV-Vis spectroscopy instrument, and a scanning electron microscope was used to analyze the surface morphology, We found that (Ag-NPs) nanoparticles have the highest absorbance at wavelengths of (400)nm and that the granular size of these material ranges between (29 – 89)nm. And The morphology analysis further revealed that (Ag-NPs) particles are spherical in shape

Rancang Bangun Sistem Distribusi Hasil Produksi Obat untuk Menjamin Kualitas dalam Meningkatkan Pelayanan Pelanggan

Pharmaceutical companies in Indonesia that are engaged in manufacturing currently continue to develop, they process medicinal ingredients into pharmaceuticals, such as tablets, syrup, capsules and others. At present the distribution and production management system of drugs is still semi-computerized, because it still uses Ms. Excel, which can cause file-to-file buildup, besides that it is possible that the data will be lost or damaged, and when searching for data, it takes a long time. To overcome this need to be built a system to process the drug distribution and production management system, to help companies more easily access drug data to computerized travel documents, so as to increase the effectiveness and time efficiency, and get maximum work results and data accuracy in data input in the relevant section. It certainly can be found with various methods that use penuls, starting from the use of uml to provide an overview of system design, then MySql as a data processing application in thedatabase, as a programming language using php

Rancang Bangun Aplikasi Game Puzzle Berbasis Android Menggunakan Algoritma Decision Tree

The development of games today is very rapid and has become part of the lifestyle. A puzzle game is an application that can be used to hone thinking and memory skills where users have to find a way out and collect special items that have been provided at every level of the game . The player must collect all the white orb in each level to get the key to move to the next level but the player will be confronted by the constraints on how to find the key and retrieve it . The game is designed using decision tree and game algorithms designed using Game Maker Studio that is applied to Android devices