A University Collaboration in Creating a Powered Air Purifying Respirator: An Emergency Innovative Response

Purpose of Study In March of 2020, the World Health Organization declared the coronavirus (COVID-19) a global pandemic. As the number of cases increased worldwide, existing hospital infrastructure struggled to keep up with the demand for equipment and supplies.This exposed healthcare workers to contracting the disease. The purpose of this study is to demonstrate an emergency innovation response in overcoming shortages of personal protective equipment within a university hospital setting, with a special focus on powered air purifying respirators (PAPRs). Methods Used The Center for Medical Innovation (CMI)-a center designed to promote research and development of high-impact healthcare products at the University of Utah (UofU)-enlisted university engineers to develop an open source PAPR system made from readily available commercial materials. Parts were selected to meet filtration, airflow, and protection specifications as outlined by industry standards. Commercially available parts consistent with these specifications were assembled into a novel PAPR system which utilized 3D printed pieces on demand to achieve compatibility. Once assembled, each PAPR went through protection testing to demonstrate health worker safety. A fit factor of 200 is the minimum requirement needed as defined by NIOSH. Testing procedures were carried out with industry standard equipment. Summary of Results A human centered design approach was utilized in iterating versions of the product based on repeated fit testing. Failures were addressed in subsequent models. All PAPRs passed fit testing with a score of > 1000. Following the lean processing standard of just in time inventory, materials to fabricate 1000 PAPRs were procured and assembled on demand. PAPRs are now being used by the UofU Hospital as well as other affiliate entities globally and are filling the gap needed for PPE. Approximately 200 units have been donated to Navajo Nations hospitals in the state of Utah and others have been donated to university sister entities in India, Nepal, and Kenya. Conclusions The Center for Medical Innovation at the University of Utah has facilitated a rapid emergency innovative response in filling the PPE needs locally and abroad by creating this open source accessible PAPR system.

Human-Centered Design in Response to a Pandemic: A Health System and Innovation Center Collaboration

Purpose of Study In the spring of 2020, the coronavirus pandemic brought new challenges to healthcare systems as the rising demand for protective equipment led to product and resource inequalities around the globe. The inability to safeguard workers led to increased infection rates and deaths of healthcare professionals worldwide. The purpose of this study is to evaluate the response of an in-house innovation committee to meet the unforeseen needs faced by healthcare systems during an acute medical crisis. Methods Used Housed directly within the University of Utah's health system (U Health), The Center for Medical Innovation (CMI) teamed up with the hospital's administration, BME, COVID task force, and occupational health to create an innovative think-tank to tackle the challenges brought in by the coronavirus pandemic, with the purpose of stratifying clinical needs based upon acuity, frequency, and urgency. While prioritizing equipment needs, CMI used human-centered design to analyze common industry practices, engineer comparable solutions from commercially available materials, test reimagined products against known gold-standards, and create open-source assembly guides that allowed others facing similar shortages to do the same. Summary of Results The close-working relationship between CMI and U Health allowed for the rapid identification, innovation, and engineering of products that met the needs of healthcare workers during the months following the COVID pandemic. Many of these were directly adopted in clinical settings, including aerosol containment tents, powered air-purifying respirators, and self-testing stations. Additionally, CMI identified and engineered 20 additional readily producible, rapid-response products in anticipation of future needs, such as a bubble CPAP, containment boxes, and re-usable PPE. From these, dozens of open source, 'Improvised Personal Protective Equipment' manuals were shared with global partners to address the inequality of medical equipment in lowresource settings. Conclusions The rapid development of easily-producible, lowcost solutions for acute clinical needs-especially those faced by the equipment shortages seen during a pandemic-is improved via the partnership between health systems and a center for medical innovation.

Robust Design Optimization of Powered Air Purifying Respirator System by Iterative Process

The personal protective equipment (PPE) has protected the frontline health workers from getting affected in COVID 19 spread situations to a certain level. Among the PPEs, PAPRs (Powered Air Purifying Respirators) are considered as one of the most efficient equipment for protection purposes. In pandemic spread situations, the PAPR becomes very much essential considering its protection. The PAPR is mainly imported to India. But the cost of PAPR being on the higher side (Rupees (Rs) 100000) becomes unaffordable to many frontline health workers. This paper focuses on the development of a cost-effective PAPR that is affordable to them. This paper projects a detailed step-by-step process of design and development of PAPR, and its evolution in each iteration. The study was conducted with the medical officers from AIMS Hospital and engineers from AMMACHI labs to bring out effective solutions for frontline health workers during a pandemic. © 2022 IEEE.

Impact of personal protective equipment attached powered air-purifying respirator on nursing-skill performance and psychosocial stress of intensive care unit COVID-19 nurses: A cross-sectional study.

AIM: To investigate how personal protective equipment with an attached powered air-purifying respirator worn by intensive care unit nurses caring for COVID-19 patients in Korea impacts nursing-skill performance and psychosocial stress. DESIGN: A cross-sectional descriptive study was designed using purposive sampling. REVIEW METHODS: Online data collection was conducted from 3 March 2021-20 March 2021on 181 nurses who had worked for more than 1 month in COVID-19 critical care settings wearing personal protective equipment with a powered air-purifying respirator. A structured questionnaire was used to gather data on sociodemographic characteristics, attitude toward personal protective equipment, nursing-skill performance wearing personal protective equipment and psychosocial stress. DATA SOURCES: Data was sourced from structured questionnaire responses. RESULTS: Nursing skill performance decreased to 63.4%, compared with normal performance. Subjects' perceptions and attitudes related to PPE scored 3.56 out of 5; 44.7% of subjects reported severe psychosocial stress, which was significantly affected by attitude toward personal protective equipment usage, nursing performance, experience caring for COVID-19 patients and length of personal protective equipment usage per shift. CONCLUSION: Greater negative attitude toward usage of personal protective equipment with a powered air-purifying respirator, results in lower nursing-skill performance and higher the psychosocial stress of nurses responding to COVID-19 outbreaks. IMPLICATIONS FOR THE PROFESSION AND/OR PATIENT CARE: High negative attitude toward PPE and low nursing-skill performance due to PPE with an attached PAPR results in significant and debilitating psychosocial stress in ICU nurses responding to COVID-19 outbreaks. To respond effectively to future infectious disease outbreaks and improve nursing performance, minimising the inconvenience and restrictions experienced by nurses wearing personal protective equipment is critical. REPORTING METHOD: We adhered to relevant EQUATOR guidelines to report. PATIENT OR PUBLIC CONTRIBUTION: No patient or public contribution.

Exploring healthcare workers' perspectives of video feedback for training in the use of powered air purifying respirators (PAPR) at the onset of the COVID-19 pandemic.

BACKGROUND: With the advent of COVID-19, many healthcare workers (HWs) in Australia requested access to powered air purifying respirators (PAPR) for improved respiratory protection, comfort and visibility. The urgency of the response at our hospital required rapid deployment of innovative training to ensure the safe use of PAPRs, in particular, a video-feedback training option to prepare HWs for PAPR competency. AIM: To explore the feasibility, acceptability, and utility of video-feedback in PAPR training and competency assessment. METHODS: Semi-structured interviews were conducted with 12 HWs, including clinicians from Intensive Care, Anaesthetics and Respiratory Medicine, at a large teaching hospital in Australia. FINDINGS: Participants believed that the use of video-feedback in PAPR training was feasible, acceptable and useful. They described a variety of benefits to learning and retention, from a variety of ways in which they engaged with the personal video-feedback. Participants also described the impact of reviewing personalised practice footage, compared to generic footage of an ideal performance. CONCLUSION: By conceptualising video-feedback using a pedagogical approach, this study contributes to knowledge around optimising methods for training HWs in PPE use, particularly when introducing a new and complex PPE device during an infectious disease outbreak.

University of Chicago Pathology Novel SARS-CoV-2 Autopsy Protocol

Background: While all autopsies pose a potential risk of exposure to infectious agents, the recent emerging SARS-CoV-2 (COVID) pandemic reminds us of this elevated potential. During this outbreak there are still few detailed protocol recommendations, limited data, and much uncertainty about how exactly to handle such a case. Furthermore, it has been estimated that SARS-CoV-2 autopsies take at least three times longer than a standard autopsy. We designed an institutional autopsy protocol to mitigate occupational risk, increase efficiency, limit exposure, and maximize educational value. Design: The personal protective equipment (PPE) for the evisceration component of the autopsy consisted of Powered Air Purifying Respirator (PAPR), two layers of long cuff disposal gloves, plastic apron, fluid proof gown, and fluid resistant leg covers. All SARS-CoV-2 autopsies were conducted by a limited number of trained personnel including an attending pathologist, resident and pathologist assistant using the Virchow evisceration method. The cranium was opened using a bone saw with an integrated vacuum. Organ retrieval, weight, and photographing of the cut surface were performed on the day of evisceration and could be completed within one hour, including cleaning of the autopsy suite. Sectioning was performed after fixation for 48-72 hours in 10% neutral buffered formalin. On the day of sectioning, a PAPR was replaced with a N95 respirator. Results: Over 10 members of our department have contributed to performing 40 COVID autopsies since 2019. No personnel became infected with SARS-CoV-2. Our complete protocol has provided our institution with resources to further study the pathogenesis of COVID in humans. It also differs from other modifications by for example, having multiple body cavities open at a time and not having autopsy rooms dedicated only to infected cadavers. Using these methods we have been able to supply numerous institutional labs with organ sections for various research protocols. Conclusions: Although post-mortem examination of COVID-infected decedents has inherent risk, only complete autopsies are a source of invaluable and irreplaceable information. This protocol was originally designed for SARS-CoV-2, but we recognize the potential application for other high-risk infectious cases. It is our hope that as more practical evidence-based biosafety guidance is disseminated the need for limited autopsies and partially or completely suspended autopsy services will be obviated.

Current Practices Surrounding Endonasal Skull Base and Pituitary Surgery during COVID-19 Pandemic: A Global Survey

INTRODUCTION: During the Sars-CoV-2 pandemic, Endoscopic Endonasal Surgery (EES) is feared to be a high-risk procedure for transmission of the COVID-19 virus. Nonetheless, data are lacking regarding the management of EES during this pandemic. METHODS: A web-based survey of skull base surgeons worldwide was conducted.Different practices by geographical regions and COVID-19 prevalence were analyzed. RESULTS: 135 unique responses were collected. Regarding the use of personal protection equipment (PPE), North America reported using more powered air-purifying respirators (PAPR) and Asia/Europe using more standard precautions. North America and Europe resorted more to reverse transcriptase polymerase chain reaction (RT-PCR) for screening asymptomatic patients. High prevalence countries showed a higher use of PAPR. The medium prevalence group reported lower RT-PCR testing for symptomatic cases and the high prevalence group used it significantly more in asymptomatic cases. 19 respondents reported healthcare personnel transmission of COVID-19 from EES, with a higher rate of transmission among countries classified as having a medium prevalence of COVID-19. These specific respondents (medium prevalence) also reported a lower use of airborne PPE. In the cases of healthcare transmission, the patient was reportedly asymptomatic 32% of the time. CONCLUSION: This survey gives an overview of EES practices during the Sars-CoV-2 pandemic. Intensified preoperative screening, even in asymptomatic patients, RT-PCR for all symptomatic cases, and an increased use of airborne PPE is associated with decreased reports of COVID-19 transmission during EES.

COVID-19-Associated Acute Invasive Fungal Rhinosinusitis

Introduction: There have been multiple reports of acute invasive fungal rhinosinusitis (AIFRS) in patients with COVID-19 infection. Most cases were associated with high dose steroid therapy in diabetic patients. We report a case of a patient with COVID-19 infection and AIFRS. We will discuss management with the unique risks to the care team. Case: A 61-year-old diabetic woman was admitted to another facility with COVID-19 pneumonia and treated with oral dexamethasone. Three days later, she developed sharp stabbing pain in the right eye with ptosis and blurry vision. She was treated with analgesics and discharged. She returned with persistent pain and increasing right-sided hypesthesia. A CT scan did not show an acute orbital or sinus infection. She was discharged with outpatient ophthalmology follow-up. She presented to our emergency department 3 days later with 48 hours of right vision loss. Physical exam also showed disconjugate gaze and right V1/V2 hypesthesia. Nasal endoscopy showed necrotic tissue within the right nasal cavity. She was immediately started on IV amphotericin and taken to the operating room for biopsy and debridement. Pathology results were consistent with necrosis and invasive fungal hyphae. She was treated with liposomal amphotericin and was eventually discharged with permanent loss of right vision. Discussion: Management of COVID-19-associated acute invasive fungal sinusitis (CA-AIFRS) presents challenges for safety of the health care team. Diabetic COVID-19 patients' new sinonasal complaints or cranial nerve deficits must be immediately evaluated for AIFRS. The CT scan changes associated with AIFRS are nonspecific early in the disease process, therefore nasal endoscopy and biopsy are critical. This requires appropriate PPEnasal endoscopy should be performed with N95 respirator, eye protection, gloves, and a disposable gown. In patients with suspicious nasal endoscopy, immediate initiation of IV antifungals is critical. The next step is biopsy and surgical debridement. This should not be delayed in COVID-19 patients. At our institution, several steps are taken to protect the healthcare team. During intubation, only necessary anesthesia staff are in the roomwith properly worn powered air purifying respirator (PAPR). A viral filter is placed on the ET tube and the room doors are closed for 20 minutes after intubation to allow for air exchange. After 20 minutes, surgical staff may enter the room. The surgical team is outfitted with PAPRs. Powered instruments associated with aerosol generation such as high-speed drills are avoided. The surgical specimens are considered contaminated with COVID19. Therefore, frozen analysis is not used. Margins are sent for permanent analysis. Cultures are sent with appropriate labeling for laboratory precautions. The tissue is debrided to healthy tissue or natural barriers such as the skull base. Conclusion: Management of COVID-19 must include an awareness of CA-AIFRS. Diabetic patients on steroids appear to be more susceptible to CA-AIFRS. Nasal endoscopy is important for evaluation. Avoiding delays in starting antifungals and operative biopsy and debridement is critical. Safety considerations need to be prepared in advance for safe surgical debridement of these patients.

COVID-19 testing laboratory: Establishment and operation aiming topmost biosafety, quality standards and timeliness at Dr. DY Patil Medical College, Pimpri, Pune

Background:Pandemic situation of SARS CoV-2 has made every country to gear up quickly for the prevention, control and testing. Accordingly, India has developed the guidelines and policies and requested all medical colleges to establish the COVID-19 testing facility under the mentorship of ICMR and NABL. Methods:As we, at our college already having the central research facility, the urgent national need has made us easy to create a testing facility for the COVID-19. As per NABL guidelines to have the requirements, we have worked together with wholehearted support and active participation from Human Resource Department, Central Purchase Department, Dean Office and honourable management excellences. All the requirements like physical lab setup, necessary equip- ment’s with calibration and validation, dedicated biosafety cabinets, PPEs, biomedical waste management, UPS system, SOPs, quality consumables, trained manpower, entry protocol, working protocol, exit protocol, result reporting system made functional systematically. Accordingly, data generated and communicated to AIIMS, Nagpur and NABL, subse- quently auditing by NABL was conducted toughly and thoroughly. Results:Without NC we got the NABL Accreditation. On the basis of recommendations of AIIMS, Nagpur and NABL Ac- creditation, the ICMR has provided the login to us. Afterwards the lab started receiving the samples for COVID -19 testing. With minimum samples we started testing and reporting to ICMR, PCMC and State Govt. following all the bi- osafety measures and necessary guidelines compliances. Due to heavy load of samples in our state, authorities have requested to increase the testing capacity, so we have geared up accordingly by improving biosafety by using powered air-purifying respirator (PAPR), additional biosafety cabinets type II B2, weekly decontamination / fumigation of lab and necessary logistics and trained staff. Till now we have tested more than 6000 samples providing the results / reports within TAT of 24 hrs. We achieved 100% concordance for external quality control.

Video review to ensure qa during emergency intubations in a global pandemic: A pilot study

INTRODUCTION: The COVID-19 pandemic has provided many obstacles for healthcare providers. One challenge has been ensuring safety during high risk procedures such as Emergency Department (ED) intubations. The risks include: little preparation time, aerosolizing nature of the procedure, and unknown COVID status. Video review has shown effectiveness in quality improvement in critical care scenarios. We aimed to determine the feasibility of using video review of ED intubations in order to gather data about these events and enact change to improve provider safety. METHODS: We captured select videos of intubations that occurred in the COVID-19 pandemic in an audiovisual capable critical care bay. Each video was captured in real time and reviewed for intubation characteristics, intubator characteristics, exposure risk, and PPE compliance. RESULTS: The majority of the intubations were emergent (88.9%). Five patients (55.6%) were in cardiac arrest. The final COVID status was negative in 8 patients (88.9%). In most cases, a senior resident or attending was the intubating provider (77.8%). The mean number of intubation attempts was 1.1 (SD 0.33). The mean number of providers present at intubation was 3.9 (SD 1.97). The mean number of nurses and technicians present was 3 (SD 0.67) and 1.4 (SD 0.97), respectively. On average, the door to the room was opened 13.67 times (range: 1-40). Provider PPE compliance was 100%. All intubating providers wore a powered air purifying respirator. All others present wore an N95 mask, gloves, gown, and eye protection. CONCLUSIONS: Video review of emergency intubations was a feasible means of evaluating provider safety and quality assurance during a global pandemic. Video review is an effective manner of evaluating adherence to PPE guidelines. It can also identify areas for improvement, such as limiting the number of providers in the room and limiting exposure to others by minimizing door-opening. These data were used to improve our intubation process. We implemented the use of pre-prepared airway boxes for each critical care bay, and walkie-talkies to communicate to those outside of the room to minimize door opening. Video review remains a fruitful and open space for quality improvement innovation and furthering the safety of patients and providers.

Overview of the Application of Powered Intelligent Air-Purifying Respirator in the Health Field

During the COVID-19 pandemic, more and more health-care workers around the world use Powered Air-Purifying Respirator (PAPR) personal respiratory protective equipment when treating patients with COVID-19. In order to provide suggestions and references for the implementation and application of existing PAPR protective equipment in the medical and health field, the typical structure of existing PAPR products is classified and summarized, focusing on the PAPR standard documents of China, the United States, the United Kingdom, and Japan. Analysis and summary of key technical requirements in national standards. From academic literature, standard documents, invention patents, product manuals, network literature and product research and other multifaceted information, the research status of Powered Air-Purifying Respirators is reviewed, synthesized and summarized. Finally, the development of international standards, Virus protection test, respiratory response control and comfort are prospected. And the deficiencies of the current PAPR products and the directions that need to be studied by relevant technical personnel in the future are pointed out. © 2021 IEEE

Respiratory Protective Equipment Reconsiderations in the Age of SARS-CoV-2

The use of respiratory protective equipment (RPE) has been recognized as an effective measure to mitigate droplet and airborne transmission of SARS-CoV-2. Although there are various types of RPE available, different RPEs serve different purposes and offer various levels of protection against aerosols. Additionally, recent evidence highlights the role of good fit in ensuring the effectiveness of RPEs. Some modified procedures can enhance the effectiveness of surgical masks by improving fit. In the age of SARS-CoV-2, there is an urgent need for knowledge about RPEs. The correct selection and use of RPEs are of pivotal importance for breaking the transmission chain of SARS-CoV-2.

A Personal Respirator to Improve Protection for Healthcare Workers Treating COVID-19 (PeRSo).

Introduction: SARS-CoV-2 infection is a global pandemic. Personal Protective Equipment (PPE) to protect healthcare workers has been a recurrent challenge in terms of global stocks, supply logistics and suitability. In some settings, around 20% of healthcare workers treating COVID-19 cases have become infected, which leads to staff absence at peaks of the pandemic, and in some cases mortality. Methods: To address shortcomings in PPE, we developed a simple powered air purifying respirator, made from inexpensive and widely available components. The prototype was designed to minimize manufacturing complexity so that derivative versions could be developed in low resource settings with minor modification. Results: The "Personal Respirator - Southampton" (PeRSo) delivers High-Efficiency Particulate Air (HEPA) filtered air from a battery powered fan-filter assembly into a lightweight hood with a clear visor that can be comfortably worn for several hours. Validation testing demonstrates that the prototype removes microbes, avoids excessive CO2 build-up in normal use, and passes fit test protocols widely used to evaluate standard N95/FFP2 and N99/FFP3 face masks. Feedback from doctors and nurses indicate the PeRSo prototype was preferred to standard FFP2 and FFP3 masks, being more comfortable and reducing the time and risk of recurrently changing PPE. Patients report better communication and reassurance as the entire face is visible. Conclusion: Rapid upscale of production of cheaply produced powered air purifying respirators, designed to achieve regulatory approval in the country of production, could protect healthcare workers from infection and improve healthcare delivery during the COVID-19 pandemic.

Efficacy of cardiopulmonary resuscitation performance while wearing a powered air-purifying respirator.

BACKGROUND: The use of personal protective equipment for respiratory infection control during cardiopulmonary resuscitation (CPR) is a physical burden to healthcare providers. The duration for which CPR quality according to recommended guidelines can be maintained under these circumstances is important. We investigated whether a 2-min shift was appropriate for chest compression and determined the duration for which chest compression was maintained in accordance with the recommended guidelines while wearing personal protective equipment. METHODS: This prospective crossover simulation study was performed at a single center from September 2020 to October 2020. Five indicators of CPR quality were measured during the first and second sessions of the study period. All participants wore a Level D powered air-purifying respirator (PAPR), and the experiment was conducted using a Resusci Anne manikin, which can measure the quality of chest compressions. Each participant conducted two sessions. In Session 1, the sequence of 2 min of chest compressions, followed by a 2-min rest, was repeated twice; in Session 2, the sequence of 1-min chest compressions followed by a 1-min rest was repeated four times. RESULTS: All 34 participants completed the study. The sufficiently deep compression rate was 65.9 ± 31.1% in the 1-min shift group and 61.5 ± 30.5% in the 2-min shift group. The mean compression depth was 52.8 ± 4.3 mm in the 1-min shift group and 51.0 ± 6.1 mm in the 2-min shift group. These two parameters were significantly different between the two groups. There was no significant difference in the other values related to CPR quality. CONCLUSIONS: Our findings indicated that 1 min of chest compressions with a 1-min rest maintained a better quality of CPR while wearing a PAPR.

Impact of Personal Protective Equipment on Out-of-Hospital Cardiac Arrest Resuscitation in Coronavirus Pandemic.

Background and Objectives: This retrospective study evaluated the clinical impact of enhanced personal protective equipment (PPE) on the clinical outcomes in patients with out-of-hospital cardiac arrest. Moreover, by focusing on the use of a powered air-purifying respirator (PAPR), we investigated the medical personnel's perceptions of wearing PAPR during cardiopulmonary resuscitation. Materials and Methods: According to the arrival time at the emergency department, the patients were categorized into a conventional PPE group (1 August 2019 to 20 January 2020) and an enhanced PPE group (21 January 2020, to 31 August 2020). The primary outcomes of this analysis were the return of spontaneous circulation (ROSC) rate. Additionally, subjective perception of the medical staff regarding the effect of wearing enhanced PPE during cardiopulmonary resuscitation (CPR) was evaluated by conducting a survey. Results: This study included 130 out-of-hospital cardiac arrest (OHCA) patients, with 73 and 57 patients in the conventional and enhanced PPE groups, respectively. The median time intervals to first intubation and to report the first arterial blood gas analysis results were longer in the enhanced PPE group than in the conventional PPE group (3 min vs. 2 min; p = 0.020 and 8 min vs. 3 min; p < 0.001, respectively). However, there were no significant differences in the ROSC rate (odds ratio (OR) = 0.79, 95% confidence interval (CI): 0.38-1.67; p = 0.542) and 1 month survival (OR 0.38, 95% CI: 0.07-2.10; p = 0.266) between the two groups. In total, 67 emergent department (ED) professionals responded to the questionnaire. Although a significant number of respondents experienced inconveniences with PAPR use, they agreed that PAPR was necessary during the CPR procedure for protection and reduction of infection transmission. Conclusion: The use of enhanced PPE, including PAPR, affected the performance of CPR to some extent but did not alter patient outcomes. PAPR use during the resuscitation of OHCA patients might positively impact the psychological stability of the medical staff.

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.

Powered air-purifying respirators used during the SARS-CoV-2 pandemic significantly reduce speech perception.

BACKGROUND: Due to the coronavirus disease 2019 (COVID-19) pandemic, interventions in the upper airways are considered high-risk procedures for otolaryngologists and their colleagues. The purpose of this study was to evaluate limitations in hearing and communication when using a powered air-purifying respirator (PAPR) system to protect against severe acute respiratory syndrome coronavirus type 2 (SARS-CoV-2) transmission and to assess the benefit of a headset. METHODS: Acoustic properties of the PAPR system were measured using a head and torso simulator. Audiological tests (tone audiometry, Freiburg speech test, Oldenburg sentence test (OLSA)) were performed in normal-hearing subjects (n = 10) to assess hearing with PAPR. The audiological test setup also included simulation of conditions in which the target speaker used either a PAPR, a filtering face piece (FFP) 3 respirator, or a surgical face mask. RESULTS: Audiological measurements revealed that sound insulation by the PAPR headtop and noise, generated by the blower-assisted respiratory protection system, resulted in significantly deteriorated hearing thresholds (4.0 ± 7.2 dB hearing level (HL) vs. 49.2 ± 11.0 dB HL, p < 0.001) and speech recognition scores in quiet (100.0 ± 0.0% vs. 2.5 ± 4.2%, p < 0.001; OLSA: 20.8 ± 1.8 dB vs. 61.0 ± 3.3 dB SPL, p < 0.001) when compared to hearing without PAPR. Hearing with PAPR was significantly improved when the subjects were equipped with an in-ear headset (p < 0.001). Sound attenuation by FFP3 respirators and surgical face masks had no clinically relevant impact on speech perception. CONCLUSIONS: The PAPR system evaluated here can be considered for high-risk procedures in SARS-CoV-2-positive patients, provided that hearing and communication of the surgical team are optimized by the additional use of a headset.

What's New in Neuraxial Labor Analgesia.

PURPOSE OF REVIEW: This article provides an update of recent practice trends in neuraxial labor analgesia. It reviews available evidence regarding management of labor pain in obstetric patients with COVID-19, serious adverse events in obstetric anesthesia to help inform risk/benefit decisions, and increasingly popular neuraxial labor analgesia techniques and adjuvants. State-of-the-art modes of epidural drug delivery are also discussed. RECENT FINDINGS: There has recently been a focus on several considerations specific to obstetric anesthesia, such as anesthetic management of obstetric patients with COVID-19, platelet thresholds for the safe performance of neuraxial analgesia in obstetric patients with thrombocytopenia, and drug delivery modes for initiation and maintenance of neuraxial labor analgesia. SUMMARY: Neuraxial labor analgesia (via standard epidural, dural puncture epidural, and combined spinal epidural techniques) is the most effective therapy to alleviate the pain of childbirth. SARS-CoV-2 infection is not, in and of itself, a contraindication to neuraxial labor analgesia or cesarean delivery anesthesia. Early initiation of neuraxial labor analgesia in patients with COVID-19 is recommended if not otherwise contraindicated, as it may reduce the need for general anesthesia should emergency cesarean delivery become necessary. Consensus regarding platelet thresholds for safe initiation of neuraxial procedures has historically been lacking. Recent studies have concluded that the risk of spinal epidural hematoma formation after neuraxial procedures is likely low at or above an imprecise range of platelet count of 70-75,000 × 106/L. Thrombocytopenia has been reported in obstetric patients with COVID-19, but severe thrombocytopenia precluding initiation of neuraxial anesthesia is extremely rare. High neuraxial blockade has emerged as one of the most common serious complications of neuraxial analgesia and anesthesia in obstetric patients. Growing awareness of factors that contribute to failed conversion of epidural labor analgesia to cesarean delivery anesthesia may help avoid the risks associated with performance of repeat neuraxial techniques and induction of general anesthesia after failed epidural blockade. Dural puncture techniques to alleviate the pain of childbirth continue to become more popular, as do adjuvant drugs to enhance or prolong neuraxial analgesia. Novel techniques for epidural drug delivery have become more widely disseminated.

Headache Related to PPE Use during the COVID-19 Pandemic.

PURPOSE OF REVIEW: Personal protection equipment (PPE)-associated headache is an unusual secondary headache disorder that predominantly occurs in healthcare workers as a consequence of the donning of protective respirators, face masks and/or eyewear. The appreciation of this entity is important given the significant ramifications upon the occupational health of healthcare workers and could additionally have an impact on persons living with pre-existing headache disorder(s). RECENT FINDINGS: There has been a renewed interest and recognition of PPE-associated headaches amongst healthcare professionals, largely brought about by the ongoing COVID-19 pandemic which has besieged healthcare systems worldwide. De novo PPE-associated headaches may present with migrainous or tension-type features and can be viewed as a subtype of external compression headache. The prognosis of the disorder is generally favourable, given that most headaches are short-lived without long-term sequalae. Several aetiologies have been postulated to account for the development of these headaches. Notably, these headaches can affect the occupational health and work performance of healthcare workers. In this review, we discuss the epidemiology, clinical characteristics, probable etiopathogenesis, management and prognosis of PPE-associated headaches in the context of the COVID-19 pandemic. Future directions for research and PPE development are proposed.