Allyson N. Hamilton1 · Sahaana Chandran1 · Christopher A. Baker1,2 · Kristen E. Gibson1
Received: 2 December 2022 / Accepted: 13 January 2023 / Published online: 21 January 2023
© The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature 2023
Abstract
Indirect contact with contaminated surfaces is a potential transmission route for COVID-19. Therefore, it is necessary to investigate convenient and inexpensive surface sanitization methods, such as HOCl, against severe acute respiratory syn-drome coronavirus 2 (SARS-CoV-2). The SARS-CoV-2 surrogate, Phi6 (~7 log PFU/mL), was prepared in artificial saliva and tripartite matrices, spot inoculated on coupons of either stainless steel or vinyl, and allowed to dry. The coupons were sprayed with either 500 ppm or 1000 ppm HOCl, and remained on the surface for 0 s (control), 5 s, 30 s, or 60 s. Samples were enumerated via the double agar overlay assay. Statistical analysis was completed in R using a generalized linear model with Quasipoisson error approximations. Time, concentration, surface type, and inoculum matrix were all significant contributors to log reduction at P=0.05. Significant three-way interactions were observed for 1000 ppm, vinyl, and 60 s (P=0.03) and 1000 ppm, tripartite, and 60 s (P=0.0121). A significant two-way interaction between vinyl and 60 s was also observed (P=0.0168). Overall, increased HOCl concentration and exposure time led to increased Phi6 reduction. Notably, the highest estimated mean log reduction was 3.31 (95% CI 3.14, 3.49) for stainless steel at 60 s and 1000 ppm HOCl in artificial saliva, indicating that this method of sanitization may not adequately reduce enveloped viruses to below infective thresholds.
Keywords Fomite · Phi6 · Hypochlorous acid · Vinyl · Stainless steel
Kyu-Il Lee1 , Yu-Kyeong Yun2 , Seung-Kyu Han2,3 , Kyung-Chul Moon2,3 , Sik Namgoong2,3 ,
Seong-Ho Jeong3 , Eun-Sang Dhong3
1Department of Plastic Surgery, Taean Public Health Office, Taean, Korea
2Diabetic Wound Center and Department of Plastic Surgery, Korea University Guro Hospital, Seoul, Korea
3Department of Plastic Surgery, Korea University College of Medicine, Seoul, Korea
Background: Adequate tissue oxygenation is a key determinant of diabetic foot ulcer (DFU) outcomes. Though transcutaneous oxygen pressure (TcPO2) is the gold standard for evaluating tissue oxygenation, its limited availability restricts routine clinical use. Consequently, toe pressure is frequently utilized as a practical surrogate; however, the direct correlation between these two modalities has yet to be rigorously investigated. This study aimed to assess the correlation and agreement between TcPO2and toe pressure in patients with DFUs.
Methods: A retrospective review was conducted on 837 DFU patients who received simultaneous TcPO2and toe pressure assessments.
The correlation between the two tests was analyzed using the Pearson correlation coefficient, and agreement was evaluated using Bland– Altman analysis. To aid interpretation, a scatterplot and Bland–Altman plot were generated.
Results: TcPO2and toe pressure demonstrated a strong correlation (R=0.66; 95% confidence interval, 0.62 to 0.70; P<0.001). Bland–
Altman analysis showed a mean bias of 26.9 mmHg (standard deviation of differences, 28.8 mmHg; 95% limits of agreement, −28.9 to 82.6 mmHg) between toe pressure and TcPO2, reflecting limited agreement and increased variability at higher perfusion levels.
Conclusion: TcPO2and toe pressure are strongly correlated. However, they are not interchangeable, particularly in DFU patients with high tissue perfusion.
Keywords: Diabetic foot; Foot ulcer; Ischemia; Microcirculation
Authors
Marcelo Buzzi
Franciele de Freitas
Hao-Yu Chiao
Chi-Yu Wang
Chih-Hsin Wang
Keywords
Erik Staffa
Vladan Bernard
Luboš Kubíček
Robert Vlachovský
Barbara Pieper
Mary Kathryn Keves-Foster
JoAnn Ashare
Mary Zugcic
Maha Albdour
Rose Ekama Ilesanmi
Odunayo Morohunfoluwa Oluwatosin
comparative study
Ayelet Levy
Amit Gefen
preclinical
伤口世界平台生态圈，以“关爱人间所有伤口患者”为愿景，连接、整合和拓展线上和线下的管理慢性伤口的资源，倡导远程、就近和居家管理慢性伤口，解决伤口专家的碎片化时间的价值创造、诊疗经验的裂变复制、和患者的就近、居家和低成本管理慢性伤口的问题。
2019广东省医疗行业协会伤口管理分会年会
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