Relationship between D-dimers and dead-space on disease severity and mortality in COVID-19 acute respiratory distress syndrome: A retrospective observational cohort study

Background Despite its diagnostic and prognostic importance, physiologic dead space fraction is not included in the current ARDS definition or severity classification. ARDS caused by COVID-19 (C-ARDS) is characterized by increased physiologic dead space fraction and hypoxemia. Our aim was to investigate the relationship between dead space indices, markers of inflammation, immunothrombosis, severity and intensive care unit (ICU) mortality. Results Retrospective data including demographics, gas exchange, ventilatory parameters, and respiratory mechanics in the first 24 h of invasive ventilation. Plasma concentrations of D-dimers and ferritin were not significantly different across C-ARDS severity categories. Weak relationships were found between D-dimers and VR (r = 0.07, p = 0.13), PETCO2/PaCO2 (r = −0.1, p = 0.02), or estimated dead space fraction (r = 0.019, p = 0.68). Age, PaO2/FiO2, pH, PETCO2/PaCO2 and ferritin, were independently associated with ICU mortality. We found no association between D-dimers or ferritin and any dead-space indices adjusting for PaO2/FiO2, days of ventilation, tidal volume, and respiratory system compliance. Conclusions We report no association between dead space and inflammatory markers in mechanically ventilated patients with C-ARDS. Our results support theories suggesting that multiple mechanisms, in addition to immunothrombosis, play a role in the pathophysiology of respiratory failure and degree of dead space in C-ARDS.

Family member perspectives on intensive care unit in-person visiting restrictions during the COVID-19 pandemic: A qualitative study.

BACKGROUND: Family member presence in the intensive care unit is important for patient well-being and recovery. Limitations to visits increase the risk of psychological distress in family members. During the COVID-19 pandemic, in-person visiting restrictions were introduced to prevent the spread of infection. PURPOSE: To explore the experience of in-person visiting restrictions imposed during the pandemic on family members of patients with COVID-19 admitted to an intensive care unit. METHOD: Qualitative method with thematic analysis. Individual semi-structured telephone interviews were conducted. FINDINGS: We interviewed 21 family members. The results are presented in one overall theme with two main themes and five sub-themes. The theme 'Striving for closeness even at a distance describes the experience of being kept at a physical distance when participants needed closeness the most. Even participants who were allowed in-person visits perceived a 'distance' due to personal protective equipment or because they could only view the patient from a window. Participants reported that contact with and information about the patient was of utmost importance. Visits were viewed as essential in providing for the patient's wellbeing. Meaningful contact with the ICU team was vital for getting useful information. Phone calls became a lifeline, with digital aids such as video calls used occasionally to overcome the feeling of distance. CONCLUSION: Visiting restrictions imposed during the COVID-19 pandemic made straightforward and comprehensible communication of information from the ICU team more essential to reduce family members' perceptions of distance and exclusion from the intensive care unit.

Intensive care nurse-led point of care ultrasound in the assessment and management of the critically ill COVID-19 patient: A single centre case series.

Focused ultrasound can be used to rapidly diagnose COVID-19 disease, assess disease severity, and inform management of COVID-19 and associated pathologies, reducing radiation exposure from other imaging modalities and minimizing spread of infection. Ultrasound examinations performed by trained nurses in the intensive care unit (ICU) enable more patients to receive these assessments. This case series evaluates the use of nurse-led focused cardiac and lung ultrasound for clinical management of ICU patients with COVID-19. We describe common pathophysiological findings and how findings were used to inform clinical decision-making. An ultrasound trained ICU nurse performed Focused Ultrasound in Intensive Care (FUSIC) cardiac and lung scans enabling calculation of a lung severity score on adult ICU patients with a confirmed COVID-19 diagnosis in a single-centre setting. Fifteen scans were performed on 15 patients. Thirteen (87%) patients had normal left ventricular function; 12 (80%) normal right ventricular function. All 15 (100%) scans identified abnormal lung findings including irregular thickened pleura, B-lines, sub-pleural consolidation and hepatization. Worse lung severity scores were correlated with higher Acute Physiology and Chronic Health Evaluation (APACHE II) scores (r = 0.70; p = .003). Of the 15 scans, 10 (67%) identified abnormal pathology contributing to a change in clinical management. This included targeted fluid removal (4, 27%), change in respiratory management (3, 20%) and need for formal echocardiographic assessment (3, 20%). Findings from five (33%) scans required no intervention. This case series demonstrates nurse-led ultrasound could be a useful adjunct in the management of the COVID-19 patient.

Psychological distress and morbidity of family members experiencing virtual visiting in intensive care during COVID-19: an observational cohort study.

PURPOSE: During the coronavirus disease 2019 (COVID-19) pandemic, intensive care units (ICUs) around the world introduced virtual visiting to mediate the psychological impact of in-person visiting restrictions. Our objective was to evaluate levels of distress, depression, anxiety, and stress among family members experiencing virtual visits. METHODS: Multi-centre prospective observational study recruiting adult family members of critically ill patients in the United Kingdom (UK) using a bespoke virtual visiting solution (aTouchAway). We recruited participants and administered validated questionnaires digitally via their aTouchAway account. Prior to first virtual visit, participants completed the Distress Thermometer (score range 0-10) and the Depression, Anxiety and Stress Scale (DASS)-21. Following first and subsequent virtual visits, participants repeated the Distress Thermometer and completed the Discrete Emotions Questionnaire. RESULTS: We recruited 2166 adult family members of ICU patients in 37 UK hospitals. Most were grown up children (33%) or spouses/partners (23%). Most (91%) were ≤ 65 years. Mean (SD) pre-virtual-visit Distress Thermometer score was 7 (2.6) with 1349/2153 (62%) reporting severe distress. Pre-visit Distress Thermometer scores were associated with relationship type (spouse/partner OR 1.65, 95% CI 1.27-2.12) but not family member age, or length of ICU stay. Mean (SD) post-visit Distress Thermometer score provided by 762 (35%) participants was 1.6 (3.2) points lower than pre-visit (P < 0.001). Of participants experiencing multiple visits, 22% continued to report severe distress. Median (IQR) pre-visit DASS-21 score was 18 (2-42) (1754 participants). Severe-to-extremely severe depression, anxiety, or stress were reported by 249 (14%), 321 (18%), and 165 (9%) participants, respectively. Participants reported a range of emotions with reassurance being the most common, anger being the least. CONCLUSION: Family members exposed to COVID-19 pandemic ICU visiting restrictions experienced severe distress. One fifth of family members reported severe-to-extremely sever anxiety or depression. Distress score magnitude and prevalence of severe distress decreased after undertaking one or more virtual visits.

Mixed-method acceptability evaluation of a co-designed bundled intervention to support communication for patients with an advanced airway in the intensive care unit during a pandemic.

BACKGROUND: Although bundled communication interventions are recommended to address communication barriers for patients with an advanced airway in the intensive care unit (ICU) such interventions have not been evaluated in pandemic conditions. AIM: To evaluate the acceptability, appropriateness, and feasibility of a co-designed bundled intervention to support communication with adult patients with an advanced airway in ICU in pandemic conditions. STUDY DESIGN: Prospective, convergent mixed method design in a single centre medical-surgical ICU in Toronto, Canada between September 2021-March 2022. After the use of the co-designed bundled communication intervention quantitative data were collected from health care providers using validated acceptability, appropriateness, and feasibility measures and analysed using descriptive statistics. Qualitative data were collected from providers, patients and families using semi-structured interviews and analysed using content analysis applying the theoretical framework of acceptability. Joint table analysis enabled the integration of the two data sets. RESULTS: A total of 64 (41.3%) HCPs responded to the survey: 54 (84.4%) rated the intervention acceptable; 55 (85.9%) appropriate; and 49 (76.6%) feasible for use in this context. Qualitative data (23 interviews: 13 healthcare providers, 6 families and 4 patients) and the joint table analysis extended the understanding that intervention acceptability was related to positive affective attitudes and reduced communication frustration. Appropriateness and feasibility were promoted through intervention alignment with values, ability to personalize tools, and ease of access. Recommendations to improve the acceptability included adaptation for immobilized and/or restrained patients, additional education, and integration into existing workflows. CONCLUSIONS: This mixed method evaluation of a co-designed bundled intervention to support patient communication in the ICU during pandemic conditions demonstrated high rated and described acceptability, appropriateness, and feasibility by participants. RELEVANCE TO CLINICAL PRACTICE: A co-designed communication intervention demonstrating stakeholder acceptability, appropriateness, and feasibility can be implemented into clinical practice in pandemic and other infection prevention and control contexts.

Family perspectives on facilitators and barriers to the set up and conduct of virtual visiting in intensive care during the COVID-19 pandemic: A qualitative interview study.

OBJECTIVE: To gain perspectives from family members about barriers and facilitators to virtual visit set up and conduct across intensive care unit settings in the United Kingdom to inform understanding of best practices. METHODS: We conducted a qualitative descriptive study recruiting a purposive sample of family members of adult intensive care unit patients experiencing virtual visiting during Jan to May 2021 of the COVID-19 pandemic. We used semi-structured qualitative interviews and a standard Thematic Analysis approach. RESULTS: We recruited 41 family-member participants from 16 hospitals in the United Kingdom. Facilitators to successful virtual visit set-up were preparation of the family, negotiating a preferred time, and easy-to-use technology. Facilitators to successful conduct were intensive care unit team member presence; enabling family involvement in care; inclusivity, accessibility, and flexibility; and having a sense of control. Barriers that created distress or conflict included restrictive virtual visiting practices; raising expectations then failing to meet them; lack of virtual visit pre-planning; and failing to prepare the patient. Barriers to visit conduct were incorrect camera positioning, insufficient technical and staff resources, issues with three-way connectivity, and lack of call closure. Recommendations included emotional self-preparation, increased technology availability, and preparing conversation topics. CONCLUSION: These data may guide virtual visiting practices during the ongoing pandemic but also to continue virtual visiting outside of pandemic conditions. This will benefit family members suffering from ill health, living at a distance, unable to afford travel, and those with work and care commitments, thereby reducing inequities of access and promoting family-centered care.

Protocol for a mixed method acceptability evaluation of a codesigned bundled COmmunication intervention for use in the adult ICU during the COVID-19 PandEmic: the COPE study

IntroductionPatients requiring invasive mechanical ventilation via an artificial airway experience sudden voicelessness placing them at risk for adverse outcomes and increasing provider workload. Infection control precautions during the COVID-19 pandemic, including the use of personal protective equipment (eg, gloves, masks, etc), patient isolation, and visitor restrictions may exacerbate communication difficulty. The objective of this study is to evaluate the acceptability of a codesigned communication intervention for use in the adult intensive care unit when infection control precautions such as those used during COVID-19 are required.Methods and analysisThis three-phased, prospective study will take place in a medical surgical ICU in a community teaching hospital in Toronto. Participants will include ICU healthcare providers, adult patients and their family members. Qualitative interviews (target n: 20–25) will explore participant perceptions of the barriers to and facilitators for supporting patient communication in the adult ICU in the context of COVID-19 and infection control precautions (phase 1). Using principles of codesign, a stakeholder advisory council of 8–10 participants will iteratively produce an intervention (phase 2). The codesigned intervention will then be implemented and undergo a mixed method acceptability evaluation in the study setting (phase 3). Acceptability, feasibility and appropriateness will be evaluated using validated measures (target n: 60–65). Follow-up semistructured interviews will be analysed using the theoretical framework of acceptability (TFA). The primary outcomes of this study will be acceptability ratings and descriptions of a codesigned COmmunication intervention for use during and beyond the COVID-19 PandEmic.Ethics and disseminationThe study protocol has been reviewed, and ethics approval was obtained from the Michael Garron Hospital. Results will be made available to healthcare providers in the study setting throughout the study and through publications and conference presentations.

Virtual visiting in intensive care during the COVID-19 pandemic: a qualitative descriptive study with ICU clinicians and non-ICU family team liaison members.

OBJECTIVE: To understand the experiences and perceived benefits of virtual visiting from the perspectives of intensive care unit (ICU)-experienced clinicians and non-ICU-experienced family liaison team members. DESIGN: Qualitative descriptive study. SETTING: Adult intensive care setting across 14 hospitals within the UK National Health Service. PARTICIPANTS: ICU-experienced clinicians and non-ICU-experienced family liaison team members deployed during the first wave of the COVID-19 pandemic. METHODS: Semistructured telephone/video interviews were conducted with ICU clinicians. Analytical themes were developed inductively following a standard thematic approach, using 'family-centred care' and 'sensemaking' as sensitising concepts. RESULTS: We completed 36 interviews, with 17 ICU-experienced clinicians and 19 non-ICU-experienced family liaison team members. In the context of inperson visiting restrictions, virtual visiting offered an alternative conduit to (1) restoring the family unit, (2) facilitating family involvement, and (3) enabling sensemaking for the family. Virtual visits with multiple family members concurrently and with those living in distant geographical locations restored a sense of family unit. Family involvement in rehabilitation, communication and orientation activities, as well as presence at the end of life, highlighted how virtual visiting could contribute to family-centred care. Virtual visits were emotionally challenging for many family members, but also cathartic in helping make sense of their own emotions and experience by visualising their relatives in the ICU. Being able to see and interact with loved ones and their immediate care providers afforded important cues to enable family sensemaking of the ICU experience. CONCLUSIONS: In this UK qualitative study of clinicians using virtual ICU visiting, in the absence of inperson visiting, virtual visiting was perceived positively as an alternative that promoted family-centred care through virtual presence. We anticipate the perceived benefits of virtual visiting may extend to non-pandemic conditions through improved equity and timeliness of family access to the ICU by offering an alternative option alongside inperson visiting.

Variation in communication and family visiting policies in intensive care within and between countries during the Covid-19 pandemic: The COVISIT international survey.

BACKGROUND: During the COVID-19 pandemic, intensive care units (ICU) introduced restrictions to in-person family visiting to safeguard patients, healthcare personnel, and visitors. METHODS: We conducted a web-based survey (March-July 2021) investigating ICU visiting practices before the pandemic, at peak COVID-19 ICU admissions, and at the time of survey response. We sought data on visiting policies and communication modes including use of virtual visiting (videoconferencing). RESULTS: We obtained 667 valid responses representing ICUs in all continents. Before the pandemic, 20% (106/525) had unrestricted visiting hours; 6% (30/525) did not allow in-person visiting. At peak, 84% (558/667) did not allow in-person visiting for patients with COVID-19; 66% for patients without COVID-19. This proportion had decreased to 55% (369/667) at time of survey reporting. A government mandate to restrict hospital visiting was reported by 53% (354/646). Most ICUs (55%, 353/615) used regular telephone updates; 50% (306/667) used telephone for formal meetings and discussions regarding prognosis or end-of-life. Virtual visiting was available in 63% (418/667) at time of survey. CONCLUSIONS: Highly restrictive visiting policies were introduced at the initial pandemic peaks, were subsequently liberalized, but without returning to pre-pandemic practices. Telephone became the primary communication mode in most ICUs, supplemented with virtual visits.

Dietetic-Led Nutrition Interventions in Patients with COVID-19 during Intensive Care and Ward-Based Rehabilitation: A Single-Center Observational Study.

BACKGROUND: In this study, a report of dietitian-led nutrition interventions for patients with COVID-19 during ICU and ward-based rehabilitation is provided. As knowledge of COVID-19 and its medical treatments evolved through the course of the pandemic, dietetic-led interventions were compared between surge 1 (S1) and surge 2 (S2). METHODS: A prospective observational study was conducted of patients admitted to the ICU service in a large academic hospital (London, UK). Clinical and nutrition data were collected during the first surge (March-June 2020; n = 200) and the second surge (November 2020-March 2021; n = 253) of COVID-19. RESULTS: A total of 453 patients were recruited. All required individualized dietetic-led interventions during ICU admission as the ICU nutrition protocol did not meet nutritional needs. Feed adjustments for deranged renal function (p = 0.001) and propofol calories (p = 0.001) were more common in S1, whereas adjustment for gastrointestinal dysfunction was more common in S2 (p = 0.001). One-third of all patients were malnourished on ICU admission, and all lost weight in ICU, with a mean (SD) total percentage loss of 8.8% (6.9%). Further weight loss was prevented over the remaining hospital stay with continued dietetic-led interventions. CONCLUSIONS: COVID-19 patients have complex nutritional needs due to malnutrition on admission and ongoing weight loss. Disease complexity and evolving nature of medical management required multifaceted dietetic-led nutritional strategies, which differed between surges.

Communication and Virtual Visiting for Families of Patients in Intensive Care during the COVID-19 Pandemic: A UK National Survey.

Rationale: Restriction or prohibition of family visiting intensive care units (ICUs) during the coronavirus disease (COVID-19) pandemic poses substantial barriers to communication and family- and patient-centered care. Objectives: To understand how communication among families, patients, and the ICU team was enabled during the pandemic. The secondary objectives were to understand strategies used to facilitate virtual visiting and associated benefits and barriers. Methods: A multicenter, cross-sectional, and self-administered electronic survey was sent (June 2020) to all 217 UK hospitals with at least one ICU. Results: The survey response rate was 54%; 117 of 217 hospitals (182 ICUs) responded. All hospitals imposed visiting restrictions, with visits not permitted under any circumstance in 16% of hospitals (28 ICUs); 63% (112 ICUs) of hospitals permitted family presence at the end of life. The responsibility for communicating with families shifted with decreased bedside nurse involvement. A dedicated ICU family-liaison team was established in 50% (106 ICUs) of hospitals. All but three hospitals instituted virtual visiting, although there was substantial heterogeneity in the videoconferencing platform used. Unconscious or sedated ICU patients were deemed ineligible for virtual visits in 23% of ICUs. Patients at the end of life were deemed ineligible for virtual visits in 7% of ICUs. Commonly reported benefits of virtual visiting were reducing patient psychological distress (78%), improving staff morale (68%), and reorientation of patients with delirium (47%). Common barriers to virtual visiting were related to insufficient staff time, rapid implementation of videoconferencing technology, and challenges associated with family members' ability to use videoconferencing technology or access a device. Conclusions: Virtual visiting and dedicated communication teams were common COVID-19 pandemic innovations addressing the restrictions to family ICU visiting, and they resulted in valuable benefits in terms of patient recovery and staff morale. Enhancing access and developing a more consistent approach to family virtual ICU visits could improve the quality of care, both during and outside of pandemic conditions.