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Tan Kimberly-Anne,Thadani Vishaal Nanik,Chan Daniel,Oh Jacob Yoong-Leong,Liu Gabriel Ka-Po 대한척추외과학회 2020 Asian Spine Journal Vol.14 No.3
The magnitude and potential duration of the current coronavirus disease 2019 (COVID-19) pandemic is something that most doctors currently in practice have yet to experience. While considerable information regarding COVID-19 is being published every day, it is challenging to filter out the most relevant or appropriate information for our individual practice. The Spine Society of Singapore convened via a teleconference on April 24, 2020 to collaborate on a national level and share collective wisdom in order to tackle the ongoing crisis. In the teleconference, 13 spine surgeons from across various hospitals in Singapore constituted the panel of experts. The following topics were discussed: repurposing of surgeons, continuity of spine services, introduction of telemedicine, triaging of spinal surgeries, preoperative testing, new challenges in performing spine surgery, and preparing for the post-pandemic era. While some issues required only the sharing of best practices, the Delphi panel method was adopted to form a consensus on others. Existing spine specific triage guidelines were debated and a locally accepted set of guidelines was established. Although preoperative testing is currently not performed routinely, the panel voted in favor of its implementation because they concluded that it is vital to protect themselves, their colleagues, and their patients. Solutions to operating room specific concerns were also discussed. This article reflects the opinions and insights shared during this meeting and reviews the evidence relevant to the issues that were raised. The rapid consensus reached during the teleconference has enabled us to be concerted, and thus stronger, in our national efforts to provide the best standard of care via our spine services in these challenging times. We believe that this article will provide some guidance for addressing COVID-19 in spine surgery and encourage other national/regional societies to conduct similar discussions that would help their navigation of this pandemic.
Daniel Chin Hao Koo,Nee Nee Tan,Qi Hwa Ng,Siti Kartini Enche Ab Rahim,Siew Chun Low,Ryan Yow Zhong Yeo 한국화학공학회 2022 Korean Journal of Chemical Engineering Vol.39 No.4
The high photocatalytic activity of environmentally benign Keggin-type polyoxometalate (POM) was introducedinto polyethersulfone (PES) membrane to promote membrane anti-fouling and self-cleaning functionality. NeatPES and POM/PES hybrid membranes were synthesized via phase inversion method. X-ray diffraction (XRD) andattenuated total reflection-Fourier transform infrared (ATR-FTIR) spectroscopy proved the success of synthesizingKeggin-type POM. The traits of the membranes were evaluated using scanning electron microscopy (SEM), ATRFTIR,contact angle measurement, porosity and porometer. The hydrophilicity of all the POM/PES hybrid membraneswas enhanced and resulted in the reduction of contact angle of the membrane (52.21±0.1101o, 45.11±0.6657o and50.30±0.1054o) for 0.025, 0.05 and 0.1wt% POM/PES hybrid membranes, respectively, compared to that of the neatPES membrane (57.30±0.0817o). Additionally, all the POM/PES hybrid membranes showed excellent anti-fouling andself-cleaning characteristics as compared to that of the neat PES membrane. 0.05 wt% POM/PES hybrid membraneoutstood all the other membranes, which marks the HA rejection at 77.12% and was able to achieve flux recovery ratio(FRR) of 111.34% with temporal superhydrophilicity effect in just merely 150 seconds at 254 nm UV irradiation.
Goei Ronn,Tan Frankie Ting Feng,Ong Amanda Jiamin,Mandler Daniel,Tok Alfred Iing Yoong 한국탄소학회 2022 Carbon Letters Vol.32 No.4
A thermally conductive film can be used to laterally conduct heat along the surface of glass windows, toward its edges where a heat sink could be located, thereby reducing temperature differential between the inside and outside surfaces of the window and thus lowering cross-sectional conductive heat transfer. This technique can offer optimized thermal energy management to modern buildings without the weight and cost of double- or triple-glazed window panels. In this work, a thermally conductive film was developed using carbon dots with inherently high thermal conductivity. Nitrogen atoms were then added to the carbon dots structure to intensify high-frequency phonon that would result in higher lateral thermal conductivity. The nitrogen-decorated carbon dots (NCDs) were prepared by a simple hydrothermal synthesis of citric acid with the addition of ethylenediamine as the N source. The NCDs were added to a cellulose-based solution and drop-casted onto FTO glass resulting in a transparent, laterally thermally conductive film, that also blocks ultraviolet (UV) and high-intensity blue light radiation. The visible-light transmission of the NCDs’ film was found to be up to 65%, comparable to the commercial solar films. The lateral thermal conductivity of the NCDs’ film increases with increasing N content up to an optimum level, suggesting the role of N to “concentrate’ the high-frequency phonons responsible for effective lateral thermal conductivity of the films.
Predictors of erectile dysfunction after transperineal template prostate biopsy
Jo-Lynn Tan,Nathan Papa,Uri Hanegbi,Ross Snow,Jeremy Grummet,Sarah Mann,Adam Cuthbertson,Mark Frydenberg,Daniel Moon 대한비뇨의학회 2021 Investigative and Clinical Urology Vol.62 No.2
Purpose: To investigate the incidence and possible contributing factors of erectile dysfunction (ED) after transperineal template prostate biopsy (TTPB). Materials and Methods: Males undergoing TTPB were prospectively administered a Sexual Health Inventory for Men (SHIM) questionnaire before biopsy and one month after. SHIM questionnaires were repeated at 3- and 9-months for males not receiving interventional treatment. Sexually inactive males were excluded. Interval change in SHIM categories based upon baseline characteristics were evaluated. Multivariable logistic regression models were used to evaluate predictors of change in SHIM score category. Results: A total of 576 males were included in our sample. Of these, 450 (78%) males underwent their first biopsy. A decline in SHIM category within the immediate 4-weeks post-biopsy was reported by 167 males (31% of total eligible sample). Age was the strongest predictor of decline in SHIM category, the predicted probability of a decline in SHIM at age 50 was 10% (95% confidence interval [CI], 1%–19%), 32% at age 60 (95% CI, 25%–40%) and 36% at age 70 (95% CI, 29%–44%). For new onset ED, the predicted probability of ED within 4-weeks post-TTPB were 6.7% at age 50 (95% CI, 0%–15%), 26% at age 60 (95% CI, 17%–34%) and 31% at age 70 (95% CI, 21%–40%). Conclusions: Older age at biopsy is an independent predictor of immediate ED after TTPB in sexually active males. This association was observed in the subgroup with no pre-existing ED. These findings provide useful information when counselling males undergoing TTPB.