Under conditions with a high concentration level of laser smoke particles, the filtration efficiency of the Ramathibodi nasal filter was studied. Different kinds of filter material in the Ramathibodi nasal filter were evaluated in human adults with an anterior standard rhinomanometric method. The Ramathibodi nasal filter with three-layers of a half-face mask filter and a 4 mm thickness polyurethane foam put inside was applied in a simulated human airway. The experiment was conducted in the Otolaryngology Department, Ramathibodi Hospital from October to December 2001. The amount and size of laser smoke particles were measured by a laser diode portable dust monitor. The amount of residual laser smoke particles in the simulated human airway without the Ramathibodi nasal filter of PM2.5, PM10 and PM15 were 100.91 +/- 7.65, 109.10 +/- 7.87 and 120.18 +/- 14.28 mcg/m3 respectively. The amount of residual laser smoke particles in the simulated human airway with the Ramathibodi nasal filter of PM2.5, PM10 and PM15 were 85.55 +/- 3.42, 92.18 +/- 4.40 and 99.72 +/- 5.02 mcg/m3 respectively. The filtration efficacy of the Ramathibodi nasal filter showed a high statistically significant difference with a p-value of <0.001 for three particle sizes. High concentration of laser smoke particles in an operative room represented suspended particulate matters which are very dangerous for human healths. The Ramathibodi nasal filter as a personal respiratory protective device applied in human nasal vestibules could protect the human airway from atmospheric suspended particulate matter.
Download full-text PDF |
Source |
|---|
Publication Analysis
Top Keywords
Similar Publications
Chronic cough management: Practical guidelines and PICO-based evidence for screening and investigation.
Asian Pac J Allergy Immunol
December 2024
Department of Clinical Epidemiology and Biostatistics, Faculty of Medicine Ramathibodi Hospital, Mahidol University, T hailand.
Chronic cough is a common clinical condition requiring comprehensive assessment. This review employs a symptom-focused approach, prioritizing the presenting symptom of "chronic cough" to mirror real-world clinical practice. Ten key questions regarding the investigations in the uncertain areas were systematically addressed based on the PICO framework and applying the GRADE system for evidence synthesis to provide the strength of recommendation and quality of evidence for key questions.
View Article and Find Full Text PDFA pilot study on nasal wash galactomannan as a surrogate marker for invasive aspergillosis among hematology patients in Thailand.
Sci Rep
November 2024
Division of Infectious Diseases, Department of Medicine, Faculty of Medicine Ramathibodi Hospital, Mahidol University, 270 Rama VI Rd, Bangkok, 10400, Thailand.
Article Synopsis
- - Universal antifungal treatment is recommended for hematology patients during chemotherapy to prevent invasive aspergillosis (IA), but challenges persist in resource-limited areas; identifying at-risk individuals could improve outcomes.
- - A pilot study in Thailand from April 2021 to January 2023 focused on the potential of nasal wash galactomannan (GM) tests as a predictor for IA in patients with acute myeloid leukemia (AML) and those undergoing stem cell transplantation (SCT).
- - Of the 34 enrolled patients, 52.9% were diagnosed with IA after six months, but nasal wash GM had limited predictive value, with sensitivity of 40% and specificity of 80%; further research is needed to strengthen
A large scale multicentre randomized, placebo-controlled subcutaneous house dust mite allergen immunotherapy (HDM SCIT) in allergic rhinitis: MITAR Study.
Asian Pac J Allergy Immunol
September 2024
Division of Allergy and Clinical Immunology, Department of Medicine, Faculty of Medicine, Chulalongkorn University; and the King Chulalongkorn Memorial Hospital, Thai Red Cross Society, Bangkok, Thailand.
Background: Previous house dust mite subcutaneous immunotherapy (HDM SCIT) placebo-controlled trials have small sample sizes and lack a consensus on baseline treatment.
Objective: To determine the efficacy of HDM SCIT in moderate-to-severe allergic rhinitis (AR) patients treated with an intranasal corticosteroid at baseline.
Methods: We conducted a randomized, placebo-controlled trial comparing HDM SCIT against placebo in Dermatophagoides pteronyssinus (Der p) sensitized.
Associations between clinical data, vaccination status, antibody responses, and post-COVID-19 symptoms in Thais infected with SARS-CoV-2 Delta and Omicron variants: a 1-year follow-up study.
BMC Infect Dis
October 2024
Department of Microbiology and Immunology, Faculty of Tropical Medicine, Mahidol University, Bangkok, 10400, Thailand.
Background: Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), which causes coronavirus disease 2019 (COVID-19), led to a global pandemic from 2020. In Thailand, five waves of outbreaks were recorded, with the fourth and fifth waves driven by the Delta and Omicron variants, resulting in over 20,000 new confirmed cases daily at their peaks.
Methods: This cross-sectional study investigated the associations between clinical symptoms, vaccination status, antibody responses, and post-COVID-19 sequelae in COVID-19 patients.
Olfactory Neuroblastoma Is Not Always Located at the Roof of the Nasal Cavity.
J Belg Soc Radiol
April 2024
Department of Radiology, Faculty of Medicine, Prince of Songkla University, Hat-Yai, Songkhla, Thailand.
Objectives: To evaluate the imaging characteristics of the tumor, emphasizing its location, and to determine the frequency of typical and atypical locations of olfactory neuroblastoma (ONB).
Materials And Methods: We retrospectively reviewed the computed tomography and magnetic resonance imaging findings of patients with pathologically proven ONB between April 2000 and April 2023. Demographic information, chief complaints, tumor location, and tumor extension were extracted.
Want AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!