Point of care ultrasound: a clinical decision support tool for COVID-19.

The COVID-19 global pandemic has overwhelmed health services with large numbers of patients presenting to hospital, requiring immediate triage and diagnosis. Complications include acute respiratory distress syndrome, myocarditis, septic shock, and multiple organ failure. Point of care ultrasound is recommended for critical care triage and monitoring in COVID-19 by specialist critical care societies, however current guidance has mainly been published in webinar format, not a comprehensive review. Important limitations of point of care ultrasound include inter-rater variability and subjectivity in interpretation of imaging findings, as well as infection control concerns. A practical approach to clinical integration of point of care ultrasound findings in COVID-19 patients is presented to enhance consistency in critical care decision making, and relevant infection control guidelines and operator precautions are discussed, based on a narrative review of the literature.

Plant polyphenols as green sunscreen ingredients: A systematic review.

BACKGROUND: Excessive exposure to ultraviolet radiation has harmful effects on human skin. At present, synthetic and mineral types of sunscreens used to protect against these harmful damages have been reported to cause negative health and environmental effects. The studies involving characterization and isolation of phytoconstituents from natural botanical sources are important to discover their potential beneficial effects on sunscreen development AIM: This systematic review provides specific and compiled information on the photoprotective properties of natural botanical sources for sunscreen development. The efforts in research and innovation are essential to ensure the safety and sustainability of plant-based sunscreen products. METHODS: In this review, a total of 35 articles were selected using the Scopus database based on the inclusion and exclusion criteria RESULT: The significant correlation between total phenolic content, total flavonoid content, antioxidant activities, and sun protection factor were shown in these studies which confirmed the potential benefits of natural plants in sunscreen development. CONCLUSIONS: In addition, natural botanical sources also exhibit excellent anti-tyrosinase, anti-aging, and anti-inflammatory activities. However, the biological activities of plants were dependent on the solvents used for extraction.

Time to intubation with McGrath™ videolaryngoscope versus direct laryngoscope in powered air-purifying respirator: a randomised controlled trial.

INTRODUCTION: During the COVID-19 pandemic, multiple guidelines have recommended the videolaryngoscope for tracheal intubation. However, there is no evidence that videolaryngoscope reduces time to tracheal intubation, which is important for COVID-19 patients with respiratory failure. METHODS: To simulate intubation of COVID-19 patients, we randomised 28 elective surgical patients to be intubated with either the McGrath™ MAC videolaryngoscope or the direct laryngoscope by specialist anaesthetists donning 3M™ Jupiter™ powered air-purifying respirators (PAPR) and N95 masks. Primary outcome was time to intubation. RESULTS: The median (IQR) times to intubation were 61s (37-63 s) and 41.5s (37-56 s) in the videolaryngoscope and direct laryngoscope groups respectively (p = 0.35). The closest mean (SD) distances between the anaesthetist and the patient during intubation were 21.6 cm (4.8 cm) and 17.6 cm (5.3 cm) in the videolaryngoscope and direct laryngoscope groups, respectively (p = 0.045). There were no significant differences in the median intubation difficulty scale scores, proportion of successful intubation at first laryngoscopic attempt and proportion of intubations requiring adjuncts. Intubations for all the patients were successful with no adverse event. CONCLUSION: There was no significant difference in the time to intubation by specialist anaesthetists who were donned in PAPR and N95 masks on elective surgical patients with either the McGrath™ videolaryngoscope or direct laryngoscope. The distance between the anaesthetist and patient was significantly further with the videolaryngoscope. The direct laryngoscope could be an equal alternative to videolaryngoscope for specialist anaesthetists when resources are limited or disrupted due to the pandemic.

Description of parallel and sequential configurations for concurrent therapeutic plasma exchange and continuous kidney replacement therapy in adults.

Therapeutic plasma exchange (TPE) and continuous kidney replacement therapy (CKRT) are extracorporeal therapeutic procedures often implemented in management of patients. Critically ill patients may be afflicted with disease processes that require both TPE and CKRT. Performing TPE discontinuous with CKRT is technically easier, however, it disrupts CKRT and may compromise with CKRT efficiency or hemofilter life. Concurrent TPE with CKRT offers several advantages including simultaneous control of disease process and correction of electrolyte, fluid, and acid-base disturbances that may accompany TPE. Additionally, TPE may be performed by either centrifugation method or membrane plasma separation method. The technical specifications of these methods may influence the methodology of concurrent connections. This report describes and reviews two different approaches to circuit arrangements when establishing concurrent TPE and CKRT.

Ensuring Sustainability of Continuous Kidney Replacement Therapy in the Face of Extraordinary Demand: Lessons From the COVID-19 Pandemic.

With the exponential surge in patients with coronavirus disease 2019 (COVID-19) worldwide, the resources needed to provide continuous kidney replacement therapy (CKRT) for patients with acute kidney injury or kidney failure may be threatened. This article summarizes subsisting strategies that can be implemented immediately. Pre-emptive weekly multicenter projections of CKRT demand based on evolving COVID-19 epidemiology and routine workload should be made. Corresponding consumables should be quantified and acquired, with diversification of sources from multiple vendors. Supply procurement should be stepped up accordingly so that a several-week stock is amassed, with administrative oversight to prevent disproportionate hoarding by institutions. Consumption of CKRT resources can be made more efficient by optimizing circuit anticoagulation to preserve filters, extending use of each vascular access, lowering blood flows to reduce citrate consumption, moderating the CKRT intensity to conserve fluids, or running accelerated KRT at higher clearance to treat more patients per machine. If logistically feasible, earlier transition to intermittent hemodialysis with online-generated dialysate, or urgent peritoneal dialysis in selected patients, may help reduce CKRT dependency. These measures, coupled to multicenter collaboration and a corresponding increase in trained medical and nursing staffing levels, may avoid downstream rationing of care and save lives during the peak of the pandemic.

Airway Pressure Release Ventilation Combined With Prone Positioning in Acute Respiratory Distress Syndrome: Old Tricks New Synergy: A Case Series.

Airway pressure release ventilation (APRV) shares several overlapping mechanisms with prone positioning in improving ventilation-perfusion mismatch in patients with acute respiratory distress syndrome (ARDS). However, the combination of APRV and prone positioning is seldom performed because assist/controlled ventilation remains the mainstay ventilatory mode. We describe 5 cases of severe ARDS where APRV and prone positioning were applied. All patients' partial pressure of arterial oxygen (PaO2):inspired oxygen concentration (FiO2) ratios improved after treatment, and 3 patients were extubated within 72 hours of turning supine. In our experience, APRV can be safely used in the prone position in a select subgroup of ARDS patients with resulting significant oxygenation improvement.

Preparing your intensive care unit for the COVID-19 pandemic: practical considerations and strategies.

The coronavirus disease 2019 (COVID-19) has rapidly evolved into a worldwide pandemic. Preparing intensive care units (ICU) is an integral part of any pandemic response. In this review, we discuss the key principles and strategies for ICU preparedness. We also describe our initial outbreak measures and share some of the challenges faced. To achieve sustainable ICU services, we propose the need to 1) prepare and implement rapid identification and isolation protocols, and a surge in ICU bed capacity; (2) provide a sustainable workforce with a focus on infection control; (3) ensure adequate supplies to equip ICUs and protect healthcare workers; and (4) maintain quality clinical management, as well as effective communication.

Sedation and Delirium in the Intensive Care Unit-A Practice-Based Approach.

INTRODUCTION: Critically ill patients often require sedation for comfort and to facilitate therapeutic interventions. Sedation practice guidelines provide an evidence-based framework with recommendations that can help improve key sedation-related outcomes. MATERIALS AND METHODS: We conducted a narrative review of current guidelines and recent trials on sedation. RESULTS: From a practice perspective, current guidelines share many limitations including lack of consensus on the definition of light sedation, optimal frequency of sedation assessment, optimal timing for light sedation and consideration of combinations of sedatives. We proposed several strategies to address these limitations and improve outcomes: 1) early light sedation within the first 48 hours with time-weighted monitoring (overall time spent in light sedation in the first 48 hours-sedation intensity-has a dose-dependent relationship with mortality risk, delirium and time to extubation); 2) provision of analgesia with minimal or no sedation where possible; 3) a goal-directed and balanced multimodal approach that combines the benefits of different agents and minimise their side effects; 4) use of dexmedetomidine and atypical antipsychotics as a sedative-sparing strategy to reduce weaning-related agitation, shorten ventilation time and accelerate physical and cognitive rehabilitation; and 5) a bundled approach to sedation that provides a framework to improve relevant clinical outcomes. CONCLUSION: More effort is required to develop a practical, time-weighted sedation scoring system. Emphasis on a balanced, multimodal appraoch that targets light sedation from the early phase of acute critical illness is important to achieve optimal sedation, lower mortality, shorten time on ventilator and reduce delirium.

Preparing for a COVID-19 pandemic: a review of operating room outbreak response measures in a large tertiary hospital in Singapore.

The coronavirus disease 2019 (COVID-19) outbreak has been designated a public health emergency of international concern. To prepare for a pandemic, hospitals need a strategy to manage their space, staff, and supplies so that optimum care is provided to patients. In addition, infection prevention measures need to be implemented to reduce in-hospital transmission. In the operating room, these preparations involve multiple stakeholders and can present a significant challenge. Here, we describe the outbreak response measures of the anesthetic department staffing the largest (1,700-bed) academic tertiary level acute care hospital in Singapore (Singapore General Hospital) and a smaller regional hospital (Sengkang General Hospital). These include engineering controls such as identification and preparation of an isolation operating room, administrative measures such as modification of workflow and processes, introduction of personal protective equipment for staff, and formulation of clinical guidelines for anesthetic management. Simulation was valuable in evaluating the feasibility of new operating room set-ups or workflow. We also discuss how the hierarchy of controls can be used as a framework to plan the necessary measures during each phase of a pandemic, and review the evidence for the measures taken. These containment measures are necessary to optimize the quality of care provided to COVID-19 patients and to reduce the risk of viral transmission to other patients or healthcare workers.

RéSUMé: L'épidémie liée au coronavirus 2019 (COVID-19) a été qualifiée d'urgence de santé publique de portée internationale. La préparation face à une pandémie nécessite de la part d'un hôpital l'élaboration de stratégies pour gérer ses infrastructures, ses processus, son personnel et ses patients; il doit notamment instaurer des mesures de prévention des infections pour réduire la transmission intrahospitalière. Pour un bloc opératoire, ces préparations impliquent la participation de nombreux acteurs et peuvent constituer un véritable défi. Nous décrivons les mesures prises en réponse à l'épidémie par le département d'anesthésie qui sert le plus grand hôpital universitaire de soins aigus (1700 lits) de Singapour (Singapore General Hospital) et un plus petit hôpital régional (Sengkang General Hospital). Cela a été obtenu grâce à des expertises d'ingénierie, telles que l'identification et la préparation d'une salle d'opération en isolation, des mesures administratives telles que la modification du déroulement des activités et des processus, l'introduction d'équipements de protection individuels pour le personnel et ­ enfin ­ la formulation de lignes directrices cliniques pour la gestion anesthésique. La simulation a été importante pour évaluer la faisabilité de toutes nouvelles modifications des salles d'opération ou d'un nouveau flux de travail. Dans le contexte des différentes phases d'une pandémie, nous discutons de l'application d'une hiérarchie de contrôles comme cadre des modifications à chaque niveau de contrôle et nous passons aussi en revue les données probantes soutenant les mesures prises. Ces mesures de confinement sont nécessaires pour optimiser la qualité des soins procurés aux patients atteints de COVID-19 et pour réduire le risque de transmission du virus à d'autres patients ou employés du domaine de la santé.

Practical Considerations for Converting Operating Rooms and Post-anaesthesia Care Units into Intensive Care Units in the COVID-19 Pandemic - Experience from a Large Singapore Tertiary Hospital.

COVID-19 has spread globally, infecting and killing millions of people worldwide. The use of operating rooms (ORs) and the post-anaesthesia care unit (PACU) for intensive care is part of surge response planning. We aim to describe and discuss some of the practical considerations involved in a large tertiary hospital in Singapore. Firstly, considerations for setting up a level III intensive care unit (ICU) include that of space, staff, supplies and standards. Secondly, oxygen supply of the entire hospital is a major determinant of the number of ventilators it can support, including those on non-invasive forms of oxygen therapy. Thirdly, air flows due to positive pressure systems within the OR complex need to be addressed. In addition, due to the worldwide shortage of ICU ventilators, the US Food and Drug Administration has granted temporary approval for the use of anaesthesia gas machines for patients requiring mechanical ventilation. Lastly, planning of logistics and staff deployment needs to be carefully considered during a crisis. Although OR and PACU are not designed for long-term care of critically ill patients, they may be adapted for ICU use with careful planning in the current pandemic.

Singapore SPICE: sedation practices in intensive care evaluation in Singapore - a prospective cohort study of the public healthcare system.

INTRODUCTION: A study was conducted to describe the sedation practices of intensive care units (ICUs) in Singapore in terms of drug use, sedation depth and the incidence of delirium in both early (< 48 hours) and late (> 48 hours) periods of ICU admission. METHODS: A prospective multicentre cohort study was conducted on patients who were expected to be sedated and ventilated for over 24 hours in seven ICUs (surgical ICU, n = 4; medical ICU, n = 3) of four major public hospitals in Singapore. Patients were followed up to 28 days or until ICU discharge, with four-hourly sedation monitoring and daily delirium assessment by trained nurses. The Richmond Agitation and Sedation Scale (RASS) and Confusion Assessment Method for the Intensive Care Unit (CAM-ICU) were used. RESULTS: We enrolled 198 patients over a five-month period. The mean Acute Physiology and Chronic Health Evaluation (APACHE) II score was 25.3 ± 9.2, and 90.9% were emergency hospital admissions. Patients were followed up for 1,417 ICU patient days, of which 396 days were in the early period and 1,021 days were in the late period. 7,354 RASS assessments were performed. Propofol and fentanyl were the sedative agents of choice in the early and late periods, respectively. Patients were mostly in the light sedation range, especially in the late period. At least one episode of delirium was seen in 23.7% of patients. CONCLUSION: Sedation practices in Singapore ICUs are characterised by light sedation depth and low incidence of delirium, possibly due to the drugs used.

An abnormal capnography trace due to air embolism in the lateral position.

Venous air embolism occurs when air is entrained into the venous system and travels to the right heart and pulmonary circulation, and commonly occurs as a complication in laparoscopic, neurosurgical and cardiac surgeries. We present a case of abnormal end-tidal carbon dioxide capnography tracing in the lateral position in a laparoscopic major liver procedure and discuss the potential novel use of this as a red flag in aiding the medical practitioner to diagnose air embolism.

A Retrospective Study of End-of-life Care Decisions in the Critically Ill in a Surgical Intensive Care Unit.

AIM: Progress in medical care and technology has led to patients with more advanced illnesses being admitted to the Intensive Care Unit (ICU). The practice of approaching end-of-life (EOL) care decisions and limiting care is well documented in Western literature but unknown in Singapore. We performed a retrospective cohort study to describe the practice of EOL care in patients dying in a Singapore surgical ICU (SICU). The surgical critical care population was chosen as it is unique because surgeons are frequently involved in the EOL process. METHODS: All consecutive patients aged 21 and above admitted to the SICU from July 2011 to March 2012, and who passed away in the ICU or within 7 days of discharge from the ICU (to account for transferred patients out of the ICU after end-of life care decisions were made and subsequently passed away) were included in the study. RESULTS: There were 473 SICU admissions during this period, out of which 53 were included with a mean age of 67.2 ± 11.1 years. EOL discussions were held in 81.1% of patients with a median time from admission to first discussion at 1 day (IQR 0-2.75) and a median number of ICU discussion of 1 (IQR 1-2). As most patients lacked decision-making capacity (inability to retain and process information secondary to the underlying disease pathology or sedative use), a surrogate was involved: group decision in 27.9%, child in 25.6% and an unclear family nominated member in 20.9%. 28.3% of patients were managed as for full active with resuscitation, 39.6% nonescalation of care, and 32.1% for withdrawal. The main reasons for conservative management (nonescalation and withdrawal of care) were certain death in 52.3%, medical futility with minimal response to maximal care (27.3%), and the presence of underlying malignancy (18.2%). There was no significant difference between race or religion among patients for active or conservative management. CONCLUSION: 71.7% of patients who passed away in the ICU or within 7 days of discharge from the ICU were managed conservatively. More timely, EOL discussions and better advance care planning may be needed to improve our patient care for patients on conservative management.

Critical evaluation of contemporary management in a new Pelvic Exenteration Unit: The first 25 consecutive cases.

AIM: To critically appraise short-term outcomes in patients treated in a new Pelvic Exenteration (PE) Unit. METHODS: This retrospective observational study was conducted by analysing prospectively collected data for the first 25 patients (16 males, 9 females) who underwent PE for advanced pelvic tumours in our PE Unit between January 2012 and October 2016. Data evaluated included age, co-morbidities, American Society of Anesthesiologists (ASA) score, Eastern Cooperative Oncology Group (ECOG) status, preoperative adjuvant treatment, intra-operative blood loss, procedural duration, perioperative adverse event, lengths of intensive care unit (ICU) stay and hospital stay, and oncological outcome. Quantitative data were summarized as percentage or median and range, and statistically assessed by the χ2 test or Fisher's exact test, as applicable. RESULTS: All 25 patients received comprehensive preoperative assessment via our dedicated multidisciplinary team approach. Long-course neoadjuvant chemoradiotherapy was provided, if indicated. The median age of the patients was 61.9-year-old. The median ASA and ECOG scores were 2 and 0, respectively. The indications for PE were locally invasive rectal adenocarcinoma (n = 13), advanced colonic adenocarcinoma (n = 5), recurrent cervical carcinoma (n = 3) and malignant sacral chordoma (n = 3). The procedures comprised 10 total PEs, 4 anterior PEs, 7 posterior PEs and 4 isolated lateral PEs. The median follow-up period was 17.6 mo. The median operative time was 11.5 h. The median volume of blood loss was 3306 mL, and the median volume of red cell transfusion was 1475 mL. The median lengths of ICU stay and of hospital stay were 1 d and 21 d, respectively. There was no case of mortality related to surgery. There were a total of 20 surgical morbidities, which occurred in 12 patients. The majority of the complications were grade 2 Clavien-Dindo. Only 2 patients experienced grade 3 Clavien-Dindo complications, and both required procedural interventions. One patient experienced grade 4a Clavien-Dindo complication, requiring temporary renal dialysis without long-term disability. The R0 resection rate was 64%. There were 7 post-exenteration recurrences during the follow-up period. No statistically significant relationship was found among histological origin of tumour, microscopic resection margin status and postoperative recurrence (P = 0.67). Four patients died from sequelae of recurrent disease during follow-up. CONCLUSION: By utilizing modern assessment and surgical techniques, our PE Unit can manage complex pelvic cancers with acceptable morbidities, zero-rate mortality and equivalent oncologic outcomes.

Invasive Streptococcus Pneumoniae Infection Causing Cardioembolic Stroke: A Clinical Proximity to Austrian Syndrome.

Streptococcus pneumoniae (S. pneumoniae) is a significant human bacterial pathogen and the major cause of pneumonia. In the post-antibiotic era, S. pneumoniae endocarditis is rare but carries a high risk of central nervous system (CNS) involvement. We present a case of invasive S. pneumoniae infection, which led to a cardioembolic stroke in a young man from septic emboli. Diagnosing a disseminated S. pneumoniae infection at an early stage is crucial and may improve patient outcomes.

Retrospective review of critical incidents in the post-anaesthesia care unit at a major tertiary hospital.

INTRODUCTION: We reviewed patients with critical incidents that occurred in the post-anaesthesia care unit (PACU) at a major tertiary hospital, and assessed the effect of these incidents on PACU length of stay and discharge disposition. METHODS: A retrospective review was conducted of patients in the PACU over a two-year period from 24 June 2011 to 23 August 2013. Data on critical incidents was recorded in the administrative database using a standardised data form. RESULTS: There were 701 incidents involving 364 patients; 203 (55.8%) patients had American Society of Anesthesiologists (ASA) physical status I or II. The most common critical incidents were cardiovascular-related (n = 293, 41.8%), respiratory (n = 155, 22.1%), neurological (n = 52, 7.4%), surgical (n = 47, 6.7%) and airway-related (n = 34, 4.9%). There were two incidents of cardiac arrest and 25 incidents of unexpected reintubations. Many patients (n = 186, 51.2%) stayed for over four hours in the PACU due to critical incidents and 184 (50.5%) patients required a higher level of care postoperatively than initially planned. Some patients (n = 34, 9.3%) returned to the operation theatre for further management. A proportion of patients (n = 64, 17.6%) had unplanned intensive care unit admissions due to adverse events in the PACU. CONCLUSION: A wide spectrum of critical incidents occur in the PACU, many of which are related to the cardiovascular and respiratory systems. Critical incidents have a major impact on healthcare utilisation and result in prolonged PACU stays and higher levels of postoperative care than initially anticipated.