Search

This study aims to design a novel air cleaning facility which conforms to the current situation in China, and moreover can satisfy our demand on air purification under the condition of poor air quality, as well as discuss the development means of a prototype product. Air conditions in the operating room of a hospital were measured as the research subject of this study. First, a suitable turbulence model and boundary conditions were selected and computational fluid dynamics (CFD) software was used to simulate indoor air distribution. The analysis and comparison of the simulation results suggested that increasing the area of air supply outlets and the number of return air inlets would not only increase the area of unidirectional flow region in main flow region, but also avoid an indoor vortex and turbulivity of the operating area. Based on the summary of heat and humidity management methods, the system operation mode and relevant parameter technologies as well as the characteristics of the thermal-humidity load of the operating room were analyzed and compiled. According to the load value and parameters of indoor design obtained after our calculations, the airflow distribution of purifying the air-conditioning system in a clean operating room was designed and checked. The research results suggested that the application of a secondary return air system in the summer could reduce energy consumption and be consistent with the concept of primaiy humidity control. This study analyzed the feasibility and energy conservation properties of cleaning air-conditioning technology in operating rooms, proposed some solutions to the problem, and performed a feasible simulation, which provides a reference for practical engineering.

OBJECTIVE: In order to solve the problem of image real-time processing and correction for high-speed endoscopic sweptsource optical coherence tomography (SS-OCT), we highly optimize a computer-unified device architecture-based platform and use a field-programmable gate array to summarize the application experience. MATERIALS AND METHODS: We use the Half-Sync/Half-Asyn mode to optimize memory in order to build a high-throughput data thread pool for CPU. We use asynchronous streaming architecture to multiplex multiple threads at high speed to accelerate data processing. At the same time, we design a rotary scanning position information encoding feedback module to suppress image drift, which can realize 25ns logic-timing sequence synchronization control through FPGA 40MHz clock. RESULTS: The maximum complete attainable axial-scan-processing rate (including memory transfer and display of B-scan frames) is 3.52 MHz for a 16-bit pixel depth and A-scans/s of 1024 pixels. To our knowledge, this is the fastest processing rate reported to date with a single-chip graphical processing unit for SS-OCT. Finally, the established high-speed SS-OCT is used to image mouse esophagus and human fingers, and the output images are stable. When the image size is 1024 × 1024 pixels, the real-time imaging rate is 200 frames per second. CONCLUSIONS: This paper develops a real-time image processing and reconstruction technology suitable for high-throughput SS-OCT systems, which can have high-density operation and efficient parallelism, while suppressing highspeed image drift. It lays the foundation for the non-destructive, in vivo, non-staining, fast and convenient early tumor diagnosis of high-speed endoscopic SS-OCT. [ABSTRACT FROM AUTHOR]

OBJECTIVE: Our aim is to characterize patients with pruritus in type 2 diabetes, determine independent risk factors and explore the impact of the psychological condition of these patients. MATERIALS AND METHODS: This is a retrospective study. From October 1, 2020, to September 30, 2021, 944 individuals with T2DM who had medical treatment were identified from the database. Electronic medical record information including patient characteristics, complications, laboratory data, and medication usage was obtained from the database. Propensity score matching, univariate analysis and a multivariable logistic regression model were used in this study. Based on observation, we discussed the psychological impact of pruritus on these patients. RESULTS: There were 97 patients with T2DM who suffered from pruritus. After propensity score matching based on age, gender, and family history of diabetes etc., 97 pairs of subjects were matched. 97 patients were categorized as the Pruritus group and 97 patients as the Non-pruritus group. In univariate analysis, there were 5 variables significantly related to pruritus, including BMI, absolute eosinophils, percentage of eosinophils, diabetic kidney disease, diabetic retinopathy. After multivariable logistic regression, BMI (OR 1.094, 95%CI 1.010-1.185) and diabetic retinopathy (OR 2.440, 95%CI 1.229-4.847) were considered significant. Patients with pruritus in T2DM suffer greatly in psychological condition in many ways. CONCLUSIONS: For patients with pruritus complicated by T2DM, BMI and diabetic retinopathy may be independent risk factors. Mental health problems such as anxiety and depression might exacerbate by pruritus. The intimate partner relationship was also challenged due to the restless sleep caused by their partner. Frequent monitoring of BMI and diabetic retinopathy and psychological assessment may be warranted in these patients. [ABSTRACT FROM AUTHOR]