Background Smartphone technology is rapidly evolving and advancing, with many of them offering health applications being used for oximetry purposes, including the Samsung Health/S Health application. Measuring oxygen saturation is one of the important indications to monitor patients with COVID-19, as well as other health conditions. These applications can be used for measuring oxygen saturation to provide a convenient solution for clinical decisions. Methods Oxygen saturation measurements were collected using the Samsung Health application for Samsung Galaxy smartphone with a sensor and camera flash and a low-cost portable digital display (liquid crystal display (LCD)) finger pulse oximeter. Intra-session reliability was established to determine the consistency between the measures. Intra-class correlation coefficients (ICCs) were calculated with 95% confidence intervals (CIs) reported for both methods. The Bland-Altman plot was used to compare the level of agreement between the two measurement methods. Results There was a statistically significant average difference between pulse oximeter and Samsung Health application measurements (t 125 = 4.407, p < 0.001), and on average, pulse oximeter measurement was 0.510 points higher than Samsung Health application measurement (95% CI = 0.281-0.740). The pulse oximeter and Samsung Health application scores were moderately correlated (r = 0.462). The results of the intra-session reliability test produced an acceptable ICC value of 0.557, indicating moderate reliability and consistent results for the measurement of oxygen saturation with both methods. The Bland-Altman plot showed a consistently equal distribution of data points scattered above and below zero. Conclusion Smartphone health applications can be used with moderate reliability to measure oxygen saturation.

OBJECTIVES: The aim of this study was to establish true histopathology proven diagnosis of chronic cholecystitis. METHODOLOGY: A cross-sectional study was conducted on 51 post-surgical gallbladders was done to assess their histopathological patterns in a single centered tertiary care hospital. The specimens were studied for chronic cholecystitis, fibrosis, hypertrophy and presence of Rokitansky-Aschoff sinuses. Descriptive analysis was done and associations of the histopathological changes with demographic data of patients were analyzed through Chi-squared test. RESULTS: Fifty-one post cholecystectomy samples of gallbladder were analyzed for histopathological changes with 82.4% showing chronic cholecystitis, 84.3% fibrosis, 64.7% congestion, and more than 60% mild or moderate hypertrophy. Moreover, 49% of the specimens showed Rokitansky-Aschoff sinuses. All these changes suggest chronic inflammation. CONCLUSION: Chronic cholecystitis, fibrosis, and Rokitansky-Aschoff sinuses are the most common histopathological findings in specimens of patients undergone cholecystectomy for cholelithiasis.