Evidence of Autoinflammation as a Principal Mechanism of Myocardial Injury in SARS-CoV-2 PCR-Positive Medical Examiner Cases (preprint)

Background Disease from Severe Acute Respiratory Syndrome Coronavirus-2 (SARS-CoV-2) remains the third leading cause of death in the United States, after cancer and heart disease. Many patients infected with this virus develop later cardiovascular complications including myocardial infarctions, stroke, arrhythmia, heart failure, and sudden cardiac death (20–28%). The purpose of this study is to understand the primary mechanism of myocardial injury in patients infected with SARS-CoV-2.Methods We investigated a consecutive cohort of 48 medical examiner cases who died with PCR-positive SARS-CoV-2 (COVpos) infection in 2020. We compared them to a consecutive cohort of 46 age and sex-matched controls who were PCR-negative for SARS-CoV-2 (COVneg). Clinical information available at postmortem examination was reviewed on each patient. Formalin-fixed sections were examined using antibodies directed against CD42 (platelets), CD15 (myeloid cells), CD68 (monocytes), C4d, Fibrin, CD34 (stem cell antigen), CD56 (natural killer cells), and Myeloperoxidase (MPO) (neutrophils and NETs). We used a Welch 2-sample T-test to determine significance. A cluster analysis of marker distribution was also done.Results We found a significant difference between COVpos and COVneg samples for all markers, all of which were significant at p < 0.001. The most prominent features were neutrophils (CD15, MPO) and MPO positive debris suggestive of NETS. A similar distribution of platelets, monocytes, fibrin and C4d was seen in COVpos cases. Clinical features were similar in COVpos and COVneg cases for age, sex, and body mass index (BMI).Conclusion These findings suggest an autoinflammatory process is likely involved in cardiac damage during these infections.

Calling all nurses-Now is the time to take action on improving the quality of care in nursing homes.

For a number of decades, nurses have raised concerns about nursing-related issues in nursing homes (NH) such as inadequate registered nurse (RN) staffing, insufficient RN and advanced practice registered nurse (APRN) gerontological expertise, and lack of RN leadership competencies. The NASEM Committee on the Quality of Care in Nursing Homes illuminated the long-standing issues and concerns affecting the quality of care in nursing homes and proposed seven goals and associated recommendations intended to achieve the Committee's vision: Nursing home residents receive care in a safe environment that honors their values and preferences, addresses goals of care, promotes equity, and assesses the benefits and risks of care and treatments. This paper outlines concrete and specific actions nurses and nursing organizations can take to ensure the recommendations are implemented.

Investigation of Blood Plasma Viral Nucleocapsid Antigen as a Marker of Active Severe Acute Respiratory Syndrome Coronavirus 2 Omicron Variant Infection.

Background: Nasopharyngeal qualitative reverse-transcription polymerase chain reaction (RT-PCR) is the gold standard for diagnosis of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection, but it is not practical or sufficient in every clinical scenario due to its inability to distinguish active from resolved infection. Alternative or adjunct testing may be needed to guide isolation precautions and treatment in patients admitted to the hospital. Methods: We performed a single-center, retrospective analysis of residual clinical specimens and medical record data to examine blood plasma nucleocapsid antigen as a candidate biomarker of active SARS-CoV-2. Adult patients admitted to the hospital or presenting to the emergency department with SARS-CoV-2 ribonucleic acid (RNA) detected by RT-PCR from a nasopharyngeal swab specimen were included. Both nasopharyngeal swab and a paired whole blood sample were required to be available for analysis. Results: Fifty-four patients were included. Eight patients had positive nasopharyngeal swab virus cultures, 7 of whom (87.5%) had concurrent antigenemia. Nineteen (79.2%) of 24 patients with detectable subgenomic RNA and 20 (80.0%) of 25 patients with N2 RT-PCR cycle threshold ≤ 33 had antigenemia. Conclusions: Most individuals with active SARS-CoV-2 infection are likely to have concurrent antigenemia, but there may be some individuals with active infection in whom antigenemia is not detectable. The potential for high sensitivity and convenience of a blood test prompts interest in further investigation as a screening tool to reduce reliance on nasopharyngeal swab sampling and as an adjunct diagnostic test to aid in clinical decision making during the period after acute coronavirus disease 2019.

Lessons Learned from the Design, Construction, and Commissioning of a Retrofitted Arthropod Containment Level 3 Insectary.

Arthropods are vectors for many pathogens that significantly harm human and animal health globally, and research into vector-borne diseases is of critical public health importance. Arthropods present unique risks for containment, and therefore insectary facilities are essential to the safe handling of arthropod-borne hazards. In 2018, the School of Life Sciences at Arizona State University (ASU) began the process to build a level 3 arthropod containment (ACL-3) facility. Even with the COVID-19 pandemic, it took more than 4 years for the insectary to be granted a Certificate of Occupancy. At the request of the ASU Environmental Health and Safety team, Gryphon Scientific, an independent team with biosafety and biological research expertise, studied the project lifecycle through the design, construction, and commissioning of the ACL-3 facility with the goal of identifying lessons learned from the delayed timeline. These lessons learned convey insight into best practices for assessing potential facility sites, anticipating challenges with retrofitted construction, preparing for commissioning, equipping the project team with necessary expertise and expectations, and supplementing the gaps in available containment guidance. Several unique mitigations designed by the ASU team to address research risks not specifically addressed in the American Committee of Medical Entomology Arthropod Containment Guidelines are also described. Completion of the ACL-3 insectary at ASU was delayed, but the team thoroughly assessed potential risks and enabled appropriate practices for the safe handling of arthropod vectors. These efforts will enhance future ACL-3 construction by helping to avoid similar setbacks and streamlining progress from concept to operation.

Pivot, persevere, or perish: how Ellume Health overcame development and regulatory obstacles to become the first authorized over-the-counter COVID-19 test in the United States.

The Ellume COVID-19 home test from Ellume Health (Brisbane, Aus) became the first COVID-19 diagnostic tool authorized for home use by the United States FDA in December 2020. This early pandemic success was built on over ten years of work on the Ellume influenza home test. Ellume overcame critical technology challenges during the development of their influenza test. In addition, it faced a recall of its COVID-19 home test in 2021 due to false positive results. While Ellume initially persevered through the recall and restarted sales in the United States, the combination of the recall and the wide availability of competitors' low-cost over the counter tests in the United States led to Ellume entering voluntary administration in September 2022. This paper traces the history of Ellume and how 10 years of experience with a home influenza test allowed the company to quickly develop the Ellume COVID-19 home test. We will also provide to diagnostic developers the key strategies employed by Ellume to succeed while highlighting the pitfalls that have challenged the company's business success.

Biosafety Practices When Working with Bats: A Guide to Field Research Considerations.

Introduction: Field work with bats is an important contribution to many areas of research in environmental biology and ecology, as well as microbiology. Work with bats poses hazards such as bites and scratches, and the potential for exposure to infectious pathogens such as rabies virus. It also exposes researchers to many other potential hazards inherent to field work, such as environmental conditions, delayed emergency responses, or challenging work conditions. Methods: This article discusses the considerations for a thorough risk assessment process around field work with bats, pre- and post-occupational health considerations, and delves into specific considerations for areas related to biosafety concerns-training, personal protective equipment, safety consideration in field methods, decontamination, and waste. It also touches on related legal and ethical issues that sit outside the realm of biosafety, but which must be addressed during the planning process. Discussion: Although the focal point of this article is bat field work located in northern and central America, the principles and practices discussed here are applicable to bat work elsewhere, as well as to field work with other animal species, and should promote careful considerations of how to safely conduct field work to protect both researchers and animals.

P158 A nurse-led model for tuberculosis services delivers safe and effective care

P158 Table 1 2018–2019 2020–2021 No: of patients 33 38 Disease site Pulmonary Extra-pulmonary Pulmonary Extra-pulmonary 45.5% 55.5% 23.6% 76.4% Single site Multi-Site Single Site Multi-Site 87.9% 12.1% 78.9% 21.1% Sensitivity Sensitive Drug Resistant Sensitive Drug Resistant 62.5% 37.5% 81.2% 18.8% Treatment started by: Doctor Nurse Doctor Nurse Inpatient Outpatient Inpatient Outpatient 24.1% 75.9% 0% 7.9% 71.1% 21% Days from symptom onset to treatment(median) 73 65 Total clinic appointments Face to face Virtual Face to face Virtual 503 1 339 11 Clinic appointments per patient (median) 13 13 Follow-up appointments led by Doctor Nurse Doctor Nurse 52% 48% 28% 72% Patients lost to follow-up 3 1 Hospital admissions 7 1 Patient deaths 0 1 ConclusionA nurse-led model for TB services provides safe, effective, and timely care.An expanded TBSN role with the support of a proactive, easily-accessible consultant may present a good model for TB service provision going forward.Further research is needed to test this model outside of the pandemic context.ReferencesBritish Thoracic society. Tuberculosis services during the Covid-19 pandemic. Available at https://www.brit-thoracic.org.uk/covid-19/covid-19-information-for-the-respiratory-community/

Collaborative Cohort of Cohorts for COVID-19 Research (C4R) Study: Study Design.

The Collaborative Cohort of Cohorts for COVID-19 Research (C4R) is a national prospective study of adults comprising 14 established US prospective cohort studies. Starting as early as 1971, investigators in the C4R cohort studies have collected data on clinical and subclinical diseases and their risk factors, including behavior, cognition, biomarkers, and social determinants of health. C4R links this pre-coronavirus disease 2019 (COVID-19) phenotyping to information on severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection and acute and postacute COVID-related illness. C4R is largely population-based, has an age range of 18-108 years, and reflects the racial, ethnic, socioeconomic, and geographic diversity of the United States. C4R ascertains SARS-CoV-2 infection and COVID-19 illness using standardized questionnaires, ascertainment of COVID-related hospitalizations and deaths, and a SARS-CoV-2 serosurvey conducted via dried blood spots. Master protocols leverage existing robust retention rates for telephone and in-person examinations and high-quality event surveillance. Extensive prepandemic data minimize referral, survival, and recall bias. Data are harmonized with research-quality phenotyping unmatched by clinical and survey-based studies; these data will be pooled and shared widely to expedite collaboration and scientific findings. This resource will allow evaluation of risk and resilience factors for COVID-19 severity and outcomes, including postacute sequelae, and assessment of the social and behavioral impact of the pandemic on long-term health trajectories.

Evidence of Autoinflammation as the Principal Mechanism of Myocardial Injury in SARS-CoV-2 PCR-Positive Autopsy Hearts (preprint)

Background Disease from Severe Acute Respiratory Syndrome Coronavirus-2 (SARS-CoV-2) remains the third leading cause of death in the United States, after cancer and heart disease. Many patients infected with this virus develop cardiovascular complications including myocardial infarctions, stroke, arrhythmia, heart failure, and sudden cardiac death. Specifically, patients with SARS-CoV-2 have a high prevalence of severe myocardial injury (20–28%). The purpose of this study is to understand the primary mechanism of myocyte injury in patients infected with SARS-CoV-2.Methods We investigated a consecutive cohort of 84 medical examiner cases who died with PCR-positive SARS-CoV-2 (COVpos) infection prior to availability of therapy or vaccines. We compared them to a consecutive cohort of 42 age- and sex-matched controls who were PCR-negative for SARS-CoV-2 (COVneg). Formalin-fixed paraffin embedded sections of left and right ventricle were examined on each case using antibodies directed against CD42 (platelets), CD15 (myeloid cells), CD68 (monocytes), C4d, Fibrin, CD34 (stem cell antigen), CD56 (natural killer cells), and Myeloperoxidase (MPO) (neutrophils and NETs). Slides were scanned using an Aperio slide scanner and viewer and each digital slide was entirely examined at 5x,10x and 20x. Each slide was graded using a 0–3 scale where 3 indicates the marker was present in every field at 20x. We used a Welch 2-sample T-test to determine significance.Results We found a significant difference between COVpos and COVneg samples for all markers, all of which were significant at p < 0.001. The most prominent features were neutrophils (CD15, MPO) and MPO positive debris suggestive of NETS and were located in or around arterioles, venules, and capillaries. A similar distribution of platelets, monocytes, and C4d was seen in COVpos cases. Fibrin was found scattered in arterioles, venules, interstitial regions, and within ventricular cavities. CD34 highlighted vascular alterations of endothelial cells in some but not all cases.Conclusion Autoinflammation is the primary mechanism of myocyte injury observed in COVpos hearts. The significant increase in platelets, monocytes, and neutrophils and the presence of neutrophil NETs, C4d, and fibrin suggest that myocardial injury involves neutrophils, NETosis, coagulation, complement activation, and monocyte accumulation.

Telemedicine and Otolaryngology in the COVID-19 Era.

OBJECTIVE: The global Coronavirus disease 2019 (COVID-19) pandemic has resulted in an expansion of telemedicine. The purpose of this study is to present our experience with outpatient telemedicine visits within a single institution's Department of Otolaryngology during the initial COVID-19 era. STUDY DESIGN: Retrospective chart review. METHODS: This was a single-institution study conducted within the Department of Otolaryngology at an urban tertiary care center. Data on outpatient visits was obtained from billing and scheduling records from January 6 to May 28, 2020. Visits were divided into "pre-shutdown" and "post-shutdown" based on our state's March 23, 2020 COVID-19 shutdown date. RESULTS: A total of 3447 of 4340 (79.4%) scheduled visits were completed in the pre-shutdown period as compared to 1451 of 1713 (84.7%) in the post-shutdown period. The proportion of telemedicine visits increased (0.7%-81.2%, P < .001). Overall visit completion rate increased following the shutdown (80.2%-84.7%, P < .001). Subspecialties with an increase in visit completion rate were general (76.9%-88.0%, P = .002), otology (77.4%-87.2%, P < .001), and rhinology (80.0%-86.2%, P = .003). Patients with Medicaid and Medicare had higher appointment completion rates following the transition to telemedicine visits (80.7%-85.7%, P = .002; 76.9%-84.7%, P = .001). Older age was associated with decreased appointment cancellation pre-shutdown (OR 0.994 [0.991-0.997], P < .001) but increased appointment cancellation post-shutdown (OR 1.008 [1.001-1.014], P = .015). Mean COVID-19 risk scores were unchanged (P = .654). CONCLUSIONS: COVID-19 has led to major changes in outpatient practice, with a significant shift from in-person to telemedicine visits following the mandatory shutdown. An associated increase in appointment completion rates was observed, reflecting a promising viable alternative to meet patient needs during this unprecedented time.

Geographic Trends in the Neurosurgery Match During the COVID-19 Pandemic.

In the present article, the impact of the COVID-19 pandemic on geographical trends in the neurosurgery match in successfully matched applicants was analyzed. A cross-sectional analysis for the years from 2017 to 2021 was performed. Successful applicants' region, state, and medical school were compared with the location of their matched residency program. The number of applicants matching at a residency program within the same region or state as their home medical school or their own medical school was then evaluated. One hundred fifteen neurosurgery residency programs and 1066 successfully matched applicants were included in the analysis. When comparing 2021 with previous years, no significant change in the percentage of applicants matching at their home region (43.1% vs 49.7%, P = .09), home state (25.1% vs 26.3%, P = .69), or home program (19.9% vs 18.7%, P = .70) was found. The COVID-19 pandemic did not significantly affect geographic trends during the neurosurgery match in 2021. This is of note as the COVID-19 pandemic significantly affected the match in other competitive specialties, including plastic surgery, dermatology, and otolaryngology. Despite limited away rotations, it is possible that neurosurgery programs did not change their applicant selection criteria and implemented systems to virtually interact with applicants outside of their local region.

SARS-CoV-2 Antigenemia is Associated With Pneumonia in Children But Lacks Sensitivity to Diagnose Acute Infection.

BACKGROUND: Nucleocapsid antigenemia in adults has demonstrated high sensitivity and specificity for acute infection, and antigen burden is associated with disease severity. Data regarding SARS-CoV-2 antigenemia in children are limited. METHODS: We retrospectively analyzed blood plasma specimens from hospitalized children with COVID-19 or MIS-C. Nucleocapsid and spike were measured using ultrasensitive immunoassays. RESULTS: We detected nucleocapsid antigenemia in 62% (50/81) and spike antigenemia in 27% (21/79) of children with acute COVID-19 but 0% (0/26) and 15% (4/26) with MIS-C from March 2020-March 2021. Higher nucleocapsid levels were associated with radiographic infiltrates and respiratory symptoms in children with COVID-19. CONCLUSIONS: Antigenemia lacks the sensitivity to diagnose acute infection in children but is associated with signs and symptoms of lower respiratory tract involvement. Further study into the mechanism of antigenemia, its association with specific organ involvement, and the role of antigenemia in the pathogenesis of COVID-19 is warranted.

The Impact of COVID-19 on the Orthopaedic Surgery Residency Match.

Introduction Matching into an orthopaedic surgery residency program presents a challenging accomplishment for applicants to achieve in any given year. Due to the profound changes to the application process caused by the coronavirus disease 2019 (COVID-19) pandemic it was theorized that there would be a change in the number of graduates matching close to their home medical school region, state, and program. Methods Orthopaedic surgery residency program Web sites and social media accounts were accessed to elucidate current resident data, including graduates' medical school, and geographical location of their school. Chi-square analysis was performed to identify trends in current residents matching within their home program, state, and region associated with the 2021 orthopaedic match. These numbers were compared with previous year's successful applicants. Results In 2021, a significant 4.4% ( p =0.02) increase in successful matches within applicants' home states occurred (33.4% vs. 37.8%) and home programs ( p <0.001) when compared with previous years (21.2% vs. 27.4%). However, in 2021, there was no significant change in home region matching ( p =0.56) with 60% of successful matches occurring in home regions. This was statistically consistent with what was observed in previous years (61.4%). Conclusion The COVID-19 pandemic was associated with restrictions in travel and interview options resulting in a significant increase in the number of orthopaedic applicants who matched into their home program, or at programs in their home state compared with previous years. Although no statistically significant regional change occurred during the 2021 match, it remains the leading predictor of where successful applicants will match. With many unknowns related to the upcoming match cycles it is important for applicants and programs to have a general idea of recent trends and outcomes to best focus their efforts, especially if diversity and minority inclusion are considered in highly competitive specialties like orthopaedic surgery.

Examining Structural Disparities in US Nursing Homes: National Survey of Health Information Technology Maturity.

BACKGROUND: There are 15,632 nursing homes (NHs) in the United States. NHs continue to receive significant policy attention due to high costs and poor outcomes of care. One strategy for improving NH care is use of health information technology (HIT). A central concept of this study is HIT maturity, which is used to identify adoption trends in HIT capabilities, use and integration within resident care, clinical support, and administrative activities. This concept is guided by the Nolan stage theory, which postulates that a system such as HIT moves through a series of measurable stages. HIT maturity is an important component of the rapidly changing NH landscape, which is being affected by policies generated to protect residents, in part because of the pandemic. OBJECTIVE: The aim of this study is to identify structural disparities in NH HIT maturity and see if it is moderated by commonly used organizational characteristics. METHODS: NHs (n=6123, >20%) were randomly recruited from each state using Nursing Home Compare data. Investigators used a validated HIT maturity survey with 9 subscales including HIT capabilities, extent of HIT use, and degree of HIT integration in resident care, clinical support, and administrative activities. Each subscale had a possible HIT maturity score of 0-100. Total HIT maturity, with a possible score of 0-900, was calculated using the 9 subscales (3 x 3 matrix). Total HIT maturity scores equate 1 of 7 HIT maturity stages (stages 0-6) for each facility. Dependent variables included HIT maturity scores. We included 5 independent variables (ie, ownership, chain status, location, number of beds, and occupancy rates). Unadjusted and adjusted cumulative odds ratios were calculated using regression models. RESULTS: Our sample (n=719) had a larger proportion of smaller facilities and a smaller proportion of larger facilities than the national nursing home population. Integrated clinical support technology had the lowest HIT maturity score compared to resident care HIT capabilities. The majority (n=486, 60.7%) of NHs report stage 3 or lower with limited capabilities to communicate about care delivery outside their facility. Larger NHs in metropolitan areas had higher odds of HIT maturity. The number of certified beds and NH location were significantly associated with HIT maturity stage while ownership, chain status, and occupancy rate were not. CONCLUSIONS: NH structural disparities were recognized through differences in HIT maturity stage. Structural disparities in this sample appear most evident in HIT maturity, measuring integration of clinical support technologies for laboratory, pharmacy, and radiology services. Ongoing assessments of NH structural disparities is crucial given 1.35 million Americans receive care in these facilities annually. Leaders must be willing to promote equal opportunities across the spectrum of health care services to incentivize and enhance HIT adoption to balance structural disparities and improve resident outcomes.

A mixed-methods analysis of telehealth implementation in nursing homes amidst the COVID-19 pandemic.

BACKGROUND: The COVID-19 pandemic has forced nursing homes to adapt new models of care in response to the evolving crisis including rapid implementation of telehealth services. The purpose of our study was to investigate implementation of telehealth in nursing homes amidst the COVID-19 pandemic using a human factors model. METHODS: Using a mixed methods design, we conducted a secondary analysis of data from a national survey of nursing home administrative leaders (n = 204). Using six survey questions, we calculated a total telehealth score (range 0-42). Descriptive statistics and paired sample t-test were used to explore the change in telehealth in two consecutive years (2019-2021). Next, we conducted semi-structured interviews with (n = 21) administrators and clinicians to assess differences in implementation according to extent of telehealth use. RESULTS: The mean telehealth score in year 1 was 12.11 (SD = 9.85) and year 2 was 19.25 (SD = 11.25). There was a significant difference in telehealth scores from year 1 to year 2 (t = 6.83, p < 0.000). While 64% of nursing homes reported higher telehealth scores in year 2 compared to year 1, over 32% reported a decline. Qualitative analysis revealed facilitators of telehealth including training, use of integrated equipment, having staff present for the visit, and using telehealth for different types of visits. Barriers included using smart phones to conduct the visit, billing, interoperability and staffing. CONCLUSION: Training, adaptation of work processes to support communication, and restructuring teams and tasks are the result of interactions between system components that could improve usability and sustainability of telehealth in nursing homes.

Nucleocapsid Antigenemia in Patients Receiving Anti-CD20 Therapy With Protracted COVID-19.

Immunocompromised patients with prolonged coronavirus disease 2019 symptoms present diagnostic and therapeutic challenges. We measured viral nucleocapsid antigenemia in 3 patients treated with anti-CD20 immunotherapy who acquired severe acute respiratory syndrome coronavirus 2 infection and experienced protracted symptoms. Our results support nucleocapsid antigenemia as a marker of persistent infection and therapeutic response.

Evaluation of a new enteral feeding tube nurse clinic at the Weston Park Hospital Radiotherapy department

The Trust provides cancer services for patients across the region. Approximately 300 patients each year receive radiotherapy for head and neck cancer, approximately 50% of these patients have enteral feeding tubes placed. Historically, Dietitians provided support for all patients with enteral feeding tubes receiving radiotherapy treatment and the local nursing service provided by the enteral tube feeding contract provider provided community clinical support. Due to increasing patient numbers and increased Dietetic workload, a new “enteral feeding tube nurse clinic” was introduced, run by the local enteral tube feeding homecare nurse, with the intention of supporting patients with enteral feeding tubes. This clinic has been running since 2019 and is a “drop-in clinic” which both staff and patients’ can access for support, including troubleshooting advice on feeding tubes, moving patients from bolus feeding to pump feeding or even giving patients reassurance that they are caring for their enteral feeding tube correctly. This is a unique service built in conjunction with the Dietetic team, designed to meet local patient’s needs. In 2020 a review took place to evaluate the level of patient satisfaction of care from the enteral feeding tube nurse clinic, to establish the confidence of patients in caring for their feeding tubes and to explore feedback from patients to develop the service further. The review took the form of a patient questionnaire, given to patients during the last week of their radiotherapy treatment. Survey questionnaire forms assessing: the patient’s satisfaction with the support and service (5-point scale: 1 not at all satisfied -5 very satisfied);how confident they felt after receiving the support (5-point scale: 1 not at all satisfied -5 very satisfied), and;about their experience overall (free text), were handed out to patients in clinic over a 6-week period. The questionnaire was completed by 12 patients. For satisfaction with the support and service 10/12 (83%) of patients scored 5: very satisfied, with the remaining 2 patients scoring 3: neutral. Comments from patients included: “nurses always willing to help”, “excellent nurses, great, quick, professional job-no fuss”, “help available whenever it is needed”, “very happy with the care provided”, “every time I have requested their help, I have had a prompt reply and always each problem has been addressed”. For confidence with enteral tube feeding procedures, 100% of patients scored 5: very confident. Comments from patients included: “I feel much happier with the tube”, “very confident in cleaning and rotation, and excellent instructions from nurses”. When asked about their experience overall, patient comments included “Thank you for all your support”, “expert care, friendly, informative”, “fantastic prompt treatment”, “grateful that I have had the support”, “friendly, professional staff are always willing to help and always have said ‘if you need me, just ask, at any time”. Due to Covid-19 the clinics had to temporarily stop, however the Dietitians and Consultants missed the instant and direct access to the homecare nurse for enteral feeding tube support, suggesting that the clinic was also highly valued by the healthcare professionals working at the clinic. In August 2021 the clinics started again and there are plans to expand the service later this year. In summary, the enteral feeding tube nurse clinic was positively evaluated by the patients attending the radiotherapy clinic. The overwhelming feedback was that having contact with an enteral tube feeding homecare nurse at least weekly throughout their radiotherapy treatment allowed them to have rapid access to support, advice, reassurance, and training if their feeding requirements changed. Due to the success of this clinic, development of similar clinics in other areas should be considered.

D-dimer Thresholds to Exclude Pulmonary Embolism among COVID-19 Patients in the Emergency Department: Derivation with Independent Validation.

OBJECTIVE: To derive and validate a D-dimer cutoff for ruling out pulmonary embolism (PE) in COVID-19 patients presenting to the emergency department (ED). METHODS: A retrospective cohort study was performed in an integrated healthcare system including 22 adult ED's between March 1, 2020, and January 31, 2021. Results were validated among patients enrolled in the RECOVER Registry, representing data from 154 ED's from 26 US states. Consecutive ED patients with laboratory confirmed COVID-19, a D-dimer performed within 48 h of ED arrival, and with objectively confirmed PE were compared to those without PE. After identifying a D-dimer threshold at which the 95% confidence lower bound of the negative predictive value for PE was higher than 98% in the derivation cohort, it was validated using RECOVER registry data. RESULTS: Among 3978 patients with a D-dimer result, 3583 with confirmed COVID-19 infection were included in the derivation cohort. Overall, PE incidence was 4.1% and a D-dimer cutoff of <2 µ/mL (2000 ng/mL) was associated with a NPV of 98.5% (95% CI = 98.0%-98.9%). In the validation cohort of 13,091 patients with a D-dimer, 7748 had confirmed COVID-19 infection, and the PE incidence was 1.14%. A D-dimer cutoff of <2 µ/mL was associated with a NPV of 99.5% (95% CI = 99.3%-99.7%). CONCLUSION: A D-dimer cutoff of <2 µ/ml was associated with a high negative predictive value for PE among patients with COVID-19. However, the resultant sensitivity for PE result at that threshold without pre-test probability assessment would be considered clinically unsafe.

Nucleocapsid Antigenemia Is a Marker of Acute SARS-CoV-2 Infection.

Detecting severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection is essential for diagnosis, treatment, and infection control. Polymerase chain reaction (PCR) fails to distinguish acute from resolved infections, as RNA is frequently detected after infectiousness. We hypothesized that nucleocapsid in blood marks acute infection with the potential to enhance isolation and treatment strategies. In a retrospective serosurvey of inpatient and outpatient encounters, we categorized samples along an infection timeline using timing of SARS-CoV-2 testing and symptomatology. Among 1860 specimens from 1607 patients, the highest levels and frequency of antigenemia were observed in samples from acute SARS-CoV-2 infection. Antigenemia was higher in seronegative individuals and in those with severe disease. In our analysis, antigenemia exhibited 85.8% sensitivity and 98.6% specificity as a biomarker for acute coronavirus disease 2019 (COVID-19). Thus, antigenemia sensitively and specifically marks acute SARS-CoV-2 infection. Further study is warranted to determine whether antigenemia may aid individualized assessment of active COVID-19.