Life After the Storm: Surviving COVID-19

This article highlights the outcomes of COVID-19, from the perspective of surviving patients, health-care systems, and societies. It draws on first-person experience of what it is to go through and survive acute respiratory distress syndrome (ARDS) and multiple organ failure. It summarizes the research on the short- and long-term outcomes for critically ill patients. The physical, cognitive, and emotional sequalae are staggering. Health-care professionals and systems will have to step up to meet the challenge of caring for large numbers of COVID-19 patients after discharge. And societies will have to step up to the ethical questions that the pandemic has made so stark. What kind of societies do we want to be, in terms of guarding the welfare of our most vulnerable citizens?

General Adaptation in Critical Illness: Glucocorticoid Receptor-alpha Master Regulator of Homeostatic Corrections

In critical illness, homeostatic corrections representing the culmination of hundreds of millions of years of evolution, are modulated by the activated glucocorticoid receptor alpha (GRα) and are associated with an enormous bioenergetic and metabolic cost. Appreciation of how homeostatic corrections work and how they evolved provides a conceptual framework to understand the complex pathobiology of critical illness. Emerging literature place the activated GRα at the center of all phases of disease development and resolution, including activation and re-enforcement of innate immunity, downregulation of pro-inflammatory transcription factors, and restoration of anatomy and function. By the time critically ill patients necessitate vital organ support for survival, they have reached near exhaustion or exhaustion of neuroendocrine homeostatic compensation, cell bio-energetic and adaptation functions, and reserves of vital micronutrients. We review how critical illness-related corticosteroid insufficiency, mitochondrial dysfunction/damage, and hypovitaminosis collectively interact to accelerate an anti-homeostatic active process of natural selection. Importantly, the allostatic overload imposed by these homeostatic corrections impacts negatively on both acute and long-term morbidity and mortality. Since the bioenergetic and metabolic reserves to support homeostatic corrections are time-limited, early interventions should be directed at increasing GRα and mitochondria number and function. Present understanding of the activated GC-GRα's role in immunomodulation and disease resolution should be taken into account when re-evaluating how to administer glucocorticoid treatment and co-interventions to improve cellular responsiveness. The activated GRα interdependence with functional mitochondria and three vitamin reserves (B1, C, and D) provides a rationale for co-interventions that include prolonged glucocorticoid treatment in association with rapid correction of hypovitaminosis.

Healing Status of Pressure Injuries Among Critically Ill Patients in a Turkish Hospital: A Descriptive, Retrospective Study

Evaluating the healing status of pressure injuries is important to planning medical and nursing care.

PURPOSE

A descriptive, retrospective study was conducted to determine the healing status of pressure injuries among critically ill immobile patients.

METHODS

Data were obtained via medical record review of all patients admitted to a Turkish university hospital's anesthesiology intensive care unit (ICU) between January 2008 and December 2015. Demographic (age, gender), medical (comorbidities, diagnosis, length of ICU stay), and pressure injury characteristics (number, location, stage, healing status, length, width, exudate amount, tissue type) were evaluated along with Pressure Ulcer Scale for Healing (PUSH) Tool scores. Data from all patients >18 years of age with an ICU stay >24 hours who had a pressure injury and whose records were complete were included in the study. Data were expressed as number, percentage, and mean and median values. Wilcoxon test, Spearman's correlation analysis, and chi-square test were performed as appropriate. Pressure injuries were considered healed when the PUSH score equaled zero.

RESULTS

The study sample comprised 359 patients (60.97 ± 19.31 [range 19-95] years, 217 men, median length of stay 25 [range 1-363] days) with 672 pressure injuries. Most pressure injuries were located on the coccyx (278 [41.4%]), and 153 (22.8%) healed during ICU stay. Older age (r = 0.167; P = .002) and length of ICU stay (r = 0.238; P = .0001) were significantly correlated with having multiple pressure injuries. There was a statistically significant relationship between pressure injury location and stage and healing status (χ2 = 28.993, P = .0001; and χ2 = 60.200, P = .001, respectively). The lowest percentage of injuries healed were on the coccyx and were stage 4 and unstageable. Overall, the mean first PUSH score was significantly higher than the last assessment score (8.99 ± 3.82 to 7.28 ± 5.22, respectively; z = -10.807; P = .0001).

CONCLUSION

Many immobile ICU patients had multiple pressure injuries, especially patients who were older and who had a longer length of stay. Healing scores for pressure injuries were better at discharge or transfer and 22% of injuries were healed. Prospective studies comparing all factors that may contribute to pressure injury healing are warranted. .

Feasibility, safety, and functional recovery after active rehabilitation in critically ill surgical patients

BACKGROUND

The characteristics of critically ill surgical patients differ from those of medical patients. Few studies have evaluated rehabilitation in surgical intensive care units (SICUs), particularly in non-Western countries and in elderly patients.

OBJECTIVE

The objective of this study was to investigate the rehabilitation characteristics, safety, and functional recovery in non-Western SICU patients.

METHODS

Data from patients who received active rehabilitation in 2016 were retrospectively reviewed. Clinical characteristics, functional recovery, and safety were investigated and compared in patients aged <65 or ≥65 years. Potential safety events were also compared between the two age groups and according to the reason for SICU admission.

RESULTS

Data from 157 patients were included in the analysis. The number of patients who were able to stand or walk increased from the beginning of rehabilitation to the time of ICU discharge (from 52 to 102 patients, P < 0.01). The Activity Measure for Post-Acute Care (AM-PAC) score also increased during rehabilitation (from 11.6 to 13.9, P < 0.01). Functional recovery did not differ between the two age groups. During 780 rehabilitation sessions, 23 potential safety events (3.0%) were noted; no significant differences were seen between the two age groups. A significant difference was noted when patients were grouped according to the reason for SICU admission (1.7% in postoperative care patients vs 4.5% in patients admitted for other reasons, P = 0.02).

CONCLUSIONS

Active rehabilitation in critically ill surgical patients is feasible and safe and resulted in improved mobility, regardless of age. However, the reason for SICU admission should be considered.

Exploring Patients' Goals Within the Intensive Care Unit Rehabilitation Setting

BACKGROUND

The number of patients surviving critical care is increasing. Quality of life after critical care is known to be poor for some patients. The evidence base for effective rehabilitation interventions in the period following a stay in an intensive care unit is limited.

OBJECTIVES

To understand what rehabilitation goals are important to patients after critical care discharge.

METHODS

This prospective study, which was undertaken during an intensive care unit recovery program, explored the recovery goals of 43 patients. Framework analysis was used to extract prevalent themes and identify the important components of recovery from the patients' perspective.

RESULTS

Participants described diverse goals for their post-intensive care unit recovery. Most goals were about health-related quality of life, including physical goals and rehabilitation. Although health was central to many of the participants' individual recovery aims, themes of family and social engagement and adopting appropriate goal trajectories also emerged within patient goals. Individual strategies for reaching these goals varied, and patients had different aspirations about what they could achieve.

CONCLUSIONS

Patients' aspirations for their intensive care unit recovery are diverse. Design of postdischarge care can be informed by this greater understanding of the heterogeneous starting points and goal trajectories of survivors of critical illness.

Framing the future: Family preparedness for care transitions of critically ill children

INTRODUCTION

Improving family centered care in the PICU requires understanding the milestones that families need assistance preparing for as well as factors that facilitate or obstruct preparedness. We present a model of family preparedness for transitions in the PICU based on semistructured interviews with clinicians and families that is designed to improve family centered care through the reduction of failed or traumatic transitions.

METHOD

We conducted semistructured interviews with 20 clinicians and 25 families in an academic PICU. Transcript analysis focused on identifying factors facilitating or obstructing family preparedness for care transitions. We analyzed interview transcripts for emergent themes and metathemes using grounded theory methodology.

RESULTS

Family preparedness for care transitions is dependent upon both cognitive and emotional preparedness. Six metathemes form a novel model for understanding the factors influencing both components of preparedness and their interrelationship. Specifically, family preparedness is influenced by (a) individualized backgrounds, coping skills, and support systems as well as the (b) emotional context, (c) care environment, (d) course of care, (e) content of preparatory information, and (f) manner in which care is coordinated to effectively deliver information. We also describe 10 transitional categories that provide context for application of the model.

DISCUSSION

Cognitive and emotional preparedness for care transitions in the PICU develops through attentiveness to six features. The conceptual model presented here will allow clinicians to support family centered care through interventions to facilitate a shared development of expectations for the future and reduce the risk of failed or traumatic transitions. (PsycINFO Database Record (c) 2019 APA, all rights reserved).

Nutrition and Exercise in Critical Illness Trial (NEXIS Trial): a protocol of a multicentred, randomised controlled trial of combined cycle ergometry and amino acid supplementation commenced early during critical illness

INTRODUCTION

Survivors of critical illness often experience significant morbidities, including muscle weakness and impairments in physical functioning. This muscle weakness is associated with longer duration mechanical ventilation, greater hospital costs and increased postdischarge impairments in physical function, quality of life and survival. Compared with standard of care, the benefits of greater protein intake combined with structured exercise started early after the onset of critical illness remain uncertain. However, the combination of protein supplementation and exercise in other populations has demonstrated positive effects on strength and function. In the present study, we will evaluate the effects of a combination of early implementation of intravenous amino acid supplementation and in-bed cycle ergometry exercise versus a 'usual care' control group in patients with acute respiratory failure requiring mechanical ventilation in an intensive care unit (ICU).

METHODS AND ANALYSIS

In this multicentre, assessor-blinded, randomised controlled trial, we will randomise 142 patients in a 1:1 ratio to usual care (which commonly consists of minimal exercise and under-achievement of guideline-recommended caloric and protein intake goals) versus a combined intravenous amino acid supplementation and in-bed cycle ergometery exercise intervention. We hypothesise that this novel combined intervention will (1) improve physical functioning at hospital discharge; (2) reduce muscle wasting with improved amino acid metabolism and protein synthesis in-hospital and (3) improve patient-reported outcomes and healthcare resource utilisation at 6 months after enrolment. Key cointerventions will be standardised. In-hospital outcome assessments will be conducted at baseline, ICU discharge and hospital discharge. An intent-to-treat analysis will be used to analyse all data with additional per-protocol analyses.

ETHICS AND DISSEMINATION

The trial received ethics approval at each institution and enrolment has begun. These results will inform both clinical practice and future research in the area. We plan to disseminate trial results in peer-reviewed journals, at national and international conferences, and via nutritional and rehabilitation-focused electronic education and knowledge translation platforms.

TRIAL REGISTRATION NUMBER

NCT03021902; Pre-results.

Risk factors for ventilator-associated events: A prospective cohort study

BACKGROUND

In January 2013, the Centers for Disease Control and Prevention released new surveillance definitions for ventilator-associated event (VAE) to replace ventilator-associated pneumonia (VAP) in adult patients. VAEs are associated with prolonged mechanical ventilation and hospital death, but little is known about their risk factors and how best to prevent them.

METHODS

We compared VAE cases with non-VAE cases with regard to demographics, comorbidities, sedative exposures, opioids exposures, paralytic exposures, routes of nutrition, blood products, gastric retention, and fluid balance. Patients mechanically ventilated for ≥4 days between January 1, 2017, and December 31, 2017, in 2 adult intensive care units of a tertiary care teaching hospital in China were included.

RESULTS

On multivariable logistic regression, significant risk factors for VAEs were positive daily fluid balances of ≥ 50 mL between day of intubation and the fourth day of mechanical ventilation (relative risk [RR], 8.39; 95% confidence interval [CI], 2.99-23.50), sedative administered between the first day and the fourth day of invasive mechanical ventilation (RR, 15.69; 95% CI, 1.62-152.06), and daily gastric retention of ≥200 mL between day of intubation and the fourth day of mechanical ventilation (RR, 9.27; 95% CI, 1.89-45.47).

CONCLUSIONS

Positive daily fluid balances of ≥50 mL, sedatives administered, and gastric retention of ≥200 mL are risk factors for VAEs. Intervention studies are needed to determine if targeting these risk factors can lower VAE rates.

Does enhanced physical rehabilitation following intensive care unit discharge improve outcomes in patients who received mechanical ventilation? A systematic review and meta-analysis

OBJECTIVE

We aimed to determine whether enhanced physical rehabilitation following intensive care unit (ICU) discharge improves activities-of-daily-living function, quality of life (QOL) and mortality among patients who received mechanical ventilation in the ICU.

DESIGN

Systematic review and meta-analysis using the Grading of Recommendations Assessment, Development and Evaluation (GRADE) approach.

DATA SOURCES

MEDLINE, Embase, CENTRAL, PEDro and WHO International Clinical Trials Registry Platform searched through January 2019.

ELIGIBILITY CRITERIA FOR SELECTING STUDIES

We included randomised controlled trials assessing the effect of post-ICU rehabilitation designed to either commence earlier and/or be more intensive than the protocol employed in the control group. Only adults who received mechanical ventilation for >24 hours were included.

DATA EXTRACTION AND SYNTHESIS

Two independent reviewers extracted data and assessed risk of bias. Standard mean differences (SMDs) with 95% CIs were calculated for QOL, and pooled risk ratios (RRs) with 95% CIs are provided for mortality. We assessed heterogeneity based on I² and the certainty of evidence based on the GRADE approach.

RESULTS

Ten trials (enrolling 1110 patients) compared physical rehabilitation with usual care or no intervention after ICU discharge. Regarding QOL, the SMD (95% CI) between the intervention and control groups for the physical and mental component summary scores was 0.06 (-0.12 to 0.24) and -0.04 (-0.20 to 0.11), respectively. Rehabilitation did not significantly decrease long-term mortality (RR 1.05, 95% CI 0.66 to 1.66). The analysed trials did not report activities-of-daily-living data. The certainty of the evidence for QOL and mortality was moderate.

CONCLUSIONS

Enhanced physical rehabilitation following ICU discharge may make little or no difference to QOL or mortality among patients who received mechanical ventilation in the ICU. Given the wide CIs, further studies are needed to confirm the efficacy of intensive post-ICU rehabilitation in selected populations.

PROSPERO REGISTRATION NUMBER

CRD42017080532.

Correlates of Cognitive Load in Surrogate Decision Makers of the Critically III

Surrogate decision makers (SDMs) of the critically ill experience intense emotions and transient states of decision fatigue. These factors may increase the cognitive load experienced by electronic decision aids. This cross-sectional study explored the associations of emotion regulation (expressive suppression and cognitive reappraisal) and decision fatigue with cognitive load (intrinsic and extraneous) among a sample of 97 SDMs of the critically ill. After completing subjective measures of emotion regulation and decision fatigue, participants were exposed to an electronic decision aid and completed a subjective measurement of cognitive load. Multiple regression analyses indicated that decision fatigue predicted intrinsic cognitive load and expressive suppression predicted extraneous cognitive load. Emotion regulation and decision fatigue represent modifiable determinants of cognitive load among SDMs exposed to electronic decision aids.

Associations of Participation-Focused Strategies and Rehabilitation Service Use With Caregiver Stress After Pediatric Critical Illness

OBJECTIVE(S)

Determine the associations between having participation-focused strategies and receiving rehabilitation services in the pediatric intensive care unit (PICU) with caregiver stress over 6 months post-PICU discharge.

DESIGN

Substudy of a data from Wee-Cover, a prospective cohort study.

SETTING

Two PICU sites.

PARTICIPANTS

Caregivers (N=168) of children 1-17 years old admitted into a PICU for ≥48 hours.

MAIN OUTCOME MEASURES

Data were collected from caregivers at enrollment and 3 and 6 months post-PICU discharge. Caregiver stress was assessed using the Pediatric Inventory for Parents. Having strategies to support their child's participation in home-based activities was assessed using the Participation and Environment Measure (PEM). In PEM, caregivers report on strategies used to support their child's participation in home-based activities. Data were dichotomized (yes, no) to denote having participation-focused strategies and if their child received PICU rehabilitation services. Additional covariates were history of a preexisting condition, child age, length of PICU stay, and change in functional capacities at PICU discharge.

RESULTS

History of a preexisting condition, time, and change in functional capacities significantly predicted caregiver stress frequency and difficulty. The interaction of having strategies-by-rehabilitation-by-time significantly predicted caregiver stress frequency and difficulty.

CONCLUSION(S)

Results highlight the role of early rehabilitation and the importance of working with caregivers to develop participation-focused strategies to support their child's functioning post-PICU. Families of children with a preexisting condition or those who experience a decrease in function during a PICU stay are susceptible to higher levels of stress and may be a priority population to target for rehabilitation services.

Determining Risk Factors to Develop a Predictive Model of Incontinence-associated Dermatitis Among Critically Ill Patients with Fecal Incontinence: A Prospective, Quantitative Study

Critically ill patients with fecal incontinence are at high risk of developing incontinence-associated dermatitis (IAD). Scientific prediction and prevention of IAD are essential.

PURPOSE

The purpose of this study was to determine the risk factors for IAD among critically ill patients with fecal incontinence. Based on this information, a predictive risk assessment model was developed to provide research evidence for IAD prevention.

METHODS

A prospective study was conducted from October 2016 to December 2017. Convenience sampling was used to recruit patients with fecal incontinence treated in intensive care units (ICUs) at Tianjin Medical University General Hospital in China. Trained nurses collected demographic data (age, gender, and ICU type), data related to fecal incontinence (Perineal Assessment Tool [PAT] scores, bowel movement frequency, and stool traits per the Bristol Stool Scale), and clinical data (length of ICU hospitalization, body temperature, diabetes history, hypertension history, consciousness, nutrition support, oxygen supply, number of antibiotic species, sedative use, and albumin levels) from participants and their medical records. The PAT was used to assess patient risk of developing IAD, and the Bristol Stool Scale was used to assess patient stool traits. Names were coded anonymously, and data were entered from paper-and-pencil questionnaires into a software program for statistical analysis. Univariate analysis and multivariate logistic regression were performed to identify risk factors for IAD. A predictive risk factor model was established using a receiver operating characteristic curve.

RESULTS

Among 266 critically ill patients with fecal incontinence (182 male, 84 female; mean age 64.18 ± 17.10), IAD incidence was 65.4%. The use of sedative drugs, coma status, higher PAT score, more frequent bowel movements, and loose stool were found to be independent risk factors for IAD (P <.05). The subsequent risk factor predictive model had a sensitivity and specificity of 99.4% and 96.7%, respectively, and the agreement rate was 98.1%.

CONCLUSION

The identified risk factors and subsequent predictive model may contribute to timely identification and quantitative risk assessment of IAD among critically ill patients. Additional quantitative research could provide a scientific basis for the development of specific preventive interventions.

Nutritional support in the recovery phase of critically ill children

PURPOSE OF REVIEW

The metabolic stress response of a critically ill child evolves over time and thus it seems reasonable that nutritional requirements change during their course of illness as well. This review proposes strategies and considerations for nutritional support during the recovery phase to gain optimal (catch-up) growth with preservation of lean body mass.

RECENT FINDINGS

Critical illness impairs nutritional status, muscle mass and function, and neurocognition, but early and high intakes of artificial nutrition during the acute phase cannot resolve this. Although (parenteral) nutrient restriction during the acute phase appears to be beneficial, persistent nutrient restriction, when the metabolic stress response resolves, has short-term and long-term detrimental consequences. Requirements increase markedly during the recovery phase to enable recovery and catch-up growth. Such large amounts of intake demand for alternate approach, especially when intestinal problems constitute a barrier for full enteral feeding. As part of the nutritional recovery, mobilization and exercise are essential to achieve catch-up growth with an optimal body composition.

SUMMARY

During the recovery phase of paediatric critical illness (catch-up) growth and muscle recovery require nutritional intakes at least two times the resting energy expenditure.

The new frontiers of rehabilitation medicine in people with chronic disabling illnesses

Because of the demographic shift and the increased proportion of patients surviving acute critical illnesses, the number of people living with severely disabling chronic diseases and, consequently, the demand for rehabilitation are expected to increase sharply over time. As underscored by the World Health Organization, there is substantial evidence that the provision of inpatient rehabilitation in specialized rehabilitation units to people with complex needs is effective in fostering functional recovery, improving health-related quality of life, increasing independence, reducing institutionalization rate, and improving prognosis. Recent studies in the real world setting reinforce the evidence that patients with ischemic heart disease or stroke benefit from rehabilitation in terms of improved prognosis. In addition, there is evidence of the effectiveness of rehabilitation for the prevention of functional deterioration in patients with complex and/or severe chronic diseases. Given this evidence of effectiveness, rehabilitation should be regarded as an essential part of the continuum of care. Nonetheless, rehabilitation still is underdeveloped and underused. Efforts should be devoted to foster healthcare professional awareness of the benefits of rehabilitation and to increase referral and participation.

Qualitative, grounded theory exploration of patients' experience of early mobilisation, rehabilitation and recovery after critical illness

RATIONALE

Physical rehabilitation (encompassing early mobilisation) of the critically ill patient is recognised best practice; however, further work is needed to explore the patients' experience of rehabilitation qualitatively; a better understanding may facilitate implementation of early rehabilitation and elucidate the journey of survivorship.

OBJECTIVES

To explore patient experience of physical rehabilitation from critical illness during and after a stay on intensive care unit (ICU).

DESIGN

Exploratory grounded theory study using semistructured interviews.

SETTING

Adult medical/surgical ICU of a London teaching hospital.

PARTICIPANTS

A purposive sample of ICU survivors with intensive care unit acquired weakness (ICUAW) and an ICU length of stay of >72 hours.

ANALYSIS

Data analysis followed a four-stage constant comparison technique: open coding, axial coding, selective coding and model development, with the aim of reaching thematic saturation. Peer debriefing and triangulation through a patient support group were carried out to ensure credibility.

MAIN RESULTS

Fifteen people were interviewed (with four relatives in attendance). The early rehabilitation period was characterised by episodic memory loss, hallucinations, weakness and fatigue, making early rehabilitation arduous and difficult to recall. Participants craved a paternalised approach to care in the early days of ICU.The central idea that emerged from this study was recalibration of the self. This is driven by a lost sense of self, with loss of autonomy and competence; dehumanised elements of care may contribute to this. Participants described a fractured life narrative due to episodic memory loss, meaning that patients were shocked on awakening from sedation by the discrepancy between their physical form and cognitive representation of themselves.

CONCLUSIONS

Recovery from ICUAW is a complex process that often begins with survivors exploring and adapting to a new body, followed by a period of recovering autonomy. Rehabilitation plays a key role in this recalibration period, helping survivors to reconstruct a desirable future.

A comparison between measured and calculated central venous oxygen saturation in critically ill patients

Background

Central venous oxygen saturation (ScvO₂) is often used to help to guide resuscitation of critically ill patients. The standard gold technique for ScvO₂ measurement is the co-oximetry (Co-oximetry_ScvO₂), which is usually incorporated in most recent blood gas analyzers. However, in some hospitals, those machines are not available and only calculated ScvO₂ (Calc_ScvO₂) is provided. Therefore, we aimed to investigate the agreement between Co-oximetry_ScvO₂ and Calc_ScvO₂ in a general population of critically ill patients and septic shock patients.

Methods

A total of 100 patients with a central venous catheter were included in the study. One hundred central venous blood samples were collected and analyzed using the same point-of-care blood gas analyzer, which provides both the calculated and measured ScvO₂ values. Bland and Altman plot, intra-class correlation coefficient (ICC), and Cohen’s Kappa coefficient were used to assess the agreement between Co-oximetry_ScvO₂ and Calc_ScvO₂. Multiple linear regression analysis was performed to investigate the independent explanatory variables of the difference between Co-oximetry_ScvO₂ and Calc_ScvO₂.

Results

In all population, Bland and Altman’s analysis showed poor agreement (+4.5 [-7.1, +16.1]%) between the two techniques. The ICC was 0.754 [(95% CI: 0.393–0.880), P< 0.001], and the Cohen’s Kappa coefficient, after categorizing the two variables into two groups using a cutoff value of 70%, was 0.470 (P <0.001). In septic shock patients (49%), Bland and Altman’s analysis also showed poor agreement (+5.6 [–6.7 to 17.8]%). The ICC was 0.720 [95% CI: 0.222–0.881], and the Cohen’s Kappa coefficient was 0.501 (P <0.001). Four independent variables (PcvO₂, Co-oximetry_ScvO₂, venous pH, and Hb) were found to be associated with the difference between the measured and calculated ScvO₂ (adjusted R² = 0.8, P<0.001), with PcvO₂ being the main independent explanatory variable because of its highest absolute standardized coefficient. The area under the receiver operator characteristic curves (AUC) of PcvO₂ to predict Co-oximetry_ScvO₂ ≥ 70% was 0.911 [95% CI: 0.837–0.959], in all patients, and 0.903 [95% CI: 0.784–0.969], in septic shock patients. The best cutoff value was ≥ 36 mmHg (sensitivity, 88%; specificity, 83%), in all patients, and ≥ 35 mmHg (sensitivity, 94%; specificity, 71%) in septic shock patients.

Conclusions

The discrepancy between the measured and calculated ScvO₂ is clinically not acceptable. We do not recommend the use of calculated ScvO₂ to guide resuscitation in critically ill patients. In situations where the Co-oximetry technique is not available, relying on PcvO₂ to predict the measured ScvO₂ value above or below 70% could be an option.

Deficits in Self-Reported Initiation Are AssociatedWith Subsequent Disability in ICU Survivors

OBJECTIVE

To determine whether deficits in a key aspect of executive functioning, namely, initiation, were associated with current and future functional disabilities in intensive care unit survivors.

METHODS

A nested substudy within a 2-center prospective observational cohort. We used 3 tests of initiation at 3 and 12 months: the Ruff Total Unique Design, Controlled Oral Word Association, and Behavior Rating Inventory of Executive Function initiation. Disability in instrumental activities of daily living (IADL) was measured with the Functional Activities Questionnaire. We used a proportional odds logistic regression model to evaluate the association between initiation and disability. Covariates in the model included age, education, baseline Functional Activities Questionnaire, pre-existing cognitive impairment, comorbidities, admission severity of illness, episodes of hypoxia, and days of severe sepsis.

RESULTS

In 195 patients, after adjusting for covariates, only the Behavior Rating Inventory of Executive Function initiation was associated with disability at any time point. Comparing the 25th vs the 75th percentile scores (95% confidence interval) of the Behavior Rating Inventory of Executive Function initiation at 3 months, patients with worse initiation scores had 5.062 times the odds (95% confidence interval: 2.539, 10.092) of disability according to the Functional Activities Questionnaire at 3 months, with similar odds at 12 months (odds ratio: 3.476, 95% confidence interval: 1.943, 6.216). Worse Behavior Rating Inventory of Executive Function initiation scores at 3 months were associated with future disability at 12 months odds ratio (95% confidence interval) 5.079 (2.579, 10.000).

CONCLUSIONS

Executive function deficits acquired after a critical illness in the domain of initiation are common in intensive care unit survivors, and when they are identified via self-report tools, they are associated with current and future disability in instrumental activities of daily living.

Effect of In-Bed Leg Cycling and Electrical Stimulation of the Quadriceps on Global Muscle Strength in Critically Ill Adults: A Randomized Clinical Trial

IMPORTANCE

Early in-bed cycling and electrical muscle stimulation may improve the benefits of rehabilitation in patients in the intensive care unit (ICU).

OBJECTIVE

To investigate whether early in-bed leg cycling plus electrical stimulation of the quadriceps muscles added to standardized early rehabilitation would result in greater muscle strength at discharge from the ICU.

DESIGN, SETTING, AND PARTICIPANTS

Single-center, randomized clinical trial enrolling critically ill adult patients at 1 ICU within an 1100-bed hospital in France. Enrollment lasted from July 2014 to June 2016 and there was a 6-month follow-up, which ended on November 24, 2016.

INTERVENTIONS

Patients were randomized to early in-bed leg cycling plus electrical stimulation of the quadriceps muscles added to standardized early rehabilitation (n = 159) or standardized early rehabilitation alone (usual care) (n = 155).

MAIN OUTCOMES AND MEASURES

The primary outcome was muscle strength at discharge from the ICU assessed by physiotherapists blinded to treatment group using the Medical Research Council grading system (score range, 0-60 points; a higher score reflects better muscle strength; minimal clinically important difference of 4 points). Secondary outcomes at ICU discharge included the number of ventilator-free days and ICU Mobility Scale score (range, 0-10; a higher score reflects better walking capability). Functional autonomy and health-related quality of life were assessed at 6 months.

RESULTS

Among 314 randomized patients, 312 (mean age, 66 years; women, 36%; receiving mechanical ventilation at study inclusion, 78%) completed the study and were included in the analysis. The median global Medical Research Council score at ICU discharge was 48 (interquartile range [IQR], 29 to 58) in the intervention group and 51 (IQR, 37 to 58) in the usual care group (median difference, -3.0 [95% CI, -7.0 to 2.8]; P = .28). The ICU Mobility Scale score at ICU discharge was 6 (IQR, 3 to 9) in both groups (median difference, 0 [95% CI, -1 to 2]; P = .52). The median number of ventilator-free days at day 28 was 21 (IQR, 6 to 25) in the intervention group and 22 (IQR, 10 to 25) in the usual care group (median difference, 1 [95% CI, -2 to 3]; P = .24). Clinically significant events occurred during mobilization sessions in 7 patients (4.4%) in the intervention group and in 9 patients (5.8%) in the usual care group. There were no significant between-group differences in the outcomes assessed at 6 months.

CONCLUSIONS AND RELEVANCE

In this single-center randomized clinical trial involving patients admitted to the ICU, adding early in-bed leg cycling exercises and electrical stimulation of the quadriceps muscles to a standardized early rehabilitation program did not improve global muscle strength at discharge from the ICU.

TRIAL REGISTRATION

ClinicalTrials.gov Identifier: NCT02185989.

Postprandial hypotension in older survivors of critical illness

PURPOSE

In older people postprandial hypotension occurs frequently; and is an independent risk factor for falls, cardiovascular events, stroke and death. The primary aim of this pilot study was to estimate the frequency of postprandial hypotension and evaluate the mechanisms underlying this condition in older survivors of an Intensive Care Unit (ICU).

MATERIALS AND METHODS

Thirty-five older (>65 years) survivors were studied 3 months after discharge. After an overnight fast, participants consumed a 300 mL drink containing 75 g glucose, labelled with 20 MBq ^99mTc-calcium phytate. Patients had concurrent measurements of blood pressure, heart rate, blood glucose and gastric emptying following drink ingestion. Proportion of participants is presented as percent (95% CI) and continuous variables as mean (SD).

RESULTS

Postprandial hypotension was evident in 10 (29%; 95% CI 14-44), orthostatic hypotension in 2 (6%; 95% CI 0-13) and cardiovascular autonomic dysfunction in 2 (6%; 95% CI 0-13) participants. The maximal postprandial nadir for systolic blood pressure and diastolic blood pressures were -29 (14) mmHg and -18 (7) mmHg.

CONCLUSIONS

In this cohort of older survivors of ICU postprandial hypotension occurred frequently . This suggests that postprandial hypotension is an unrecognised issue in older ICU survivors.

Early rehabilitation to prevent postintensive care syndrome in patients with critical illness: a systematic review and meta-analysis

INTRODUCTION

We examined the effectiveness of early rehabilitation for the prevention of postintensive care syndrome (PICS), characterised by an impaired physical, cognitive or mental health status, among survivors of critical illness.

METHODS

We performed a systematic literature search of several databases (Medline, Embase and Cochrane Central Register of Controlled Trials) and a manual search to identify randomised controlled trials (RCTs) comparing the effectiveness of early rehabilitation versus no early rehabilitation or standard care for the prevention of PICS. The primary outcomes were short-term physical-related, cognitive-related and mental health-related outcomes assessed during hospitalisation. The secondary outcomes were the standardised, long-term health-related quality of life scores (EuroQol 5 Dimension (EQ5D) and the Medical Outcomes Study 36-Item Short Form Health Survey Physical Function Scale (SF-36 PF)). We used the Grading of Recommendations Assessment, Development and Evaluation approach to rate the quality of evidence (QoE).

RESULTS

Six RCTs selected from 5105 screened abstracts were included. Early rehabilitation significantly improved short-term physical-related outcomes, as indicated by an increased Medical Research Council scale score (standardised mean difference (SMD): 0.38, 95% CI 0.10 to 0.66, p=0.009) (QoE: low) and a decreased incidence of intensive care unit-acquired weakness (OR 0.42, 95% CI 0.22 to 0.82, p=0.01, QoE: low), compared with standard care or no early rehabilitation. However, the two groups did not differ in terms of cognitive-related delirium-free days (SMD: -0.02, 95% CI -0.23 to 0.20, QoE: low) and the mental health-related Hospital Anxiety and Depression Scale score (OR: 0.79, 95% CI 0.29 to 2.12, QoE: low). Early rehabilitation did not improve the long-term outcomes of PICS as characterised by EQ5D and SF-36 PF.

CONCLUSIONS

Early rehabilitation improved only short-term physical-related outcomes in patients with critical illness. Additional large RCTs are needed.

Early intervention (mobilization or active exercise) for critically ill adults in the intensive care unit

BACKGROUND

Survivors of critical illness often experience a multitude of problems that begin in the intensive care unit (ICU) or present and continue after discharge. These can include muscle weakness, cognitive impairments, psychological difficulties, reduced physical function such as in activities of daily living (ADLs), and decreased quality of life. Early interventions such as mobilizations or active exercise, or both, may diminish the impact of the sequelae of critical illness.

OBJECTIVES

To assess the effects of early intervention (mobilization or active exercise), commenced in the ICU, provided to critically ill adults either during or after the mechanical ventilation period, compared with delayed exercise or usual care, on improving physical function or performance, muscle strength and health-related quality of life.

SEARCH METHODS

We searched CENTRAL, MEDLINE, Embase and CINAHL. We searched conference proceedings, reference lists of retrieved articles, databases of trial registries and contacted experts in the field on 31 August 2017. We did not impose restrictions on language or location of publications.

SELECTION CRITERIA

We included all randomized controlled trials (RCTs) or quasi-RCTs that compared early intervention (mobilization or active exercise, or both), delivered in the ICU, with delayed exercise or usual care delivered to critically ill adults either during or after the mechanical ventilation period in the ICU.

DATA COLLECTION AND ANALYSIS

Two researchers independently screened titles and abstracts and assessed full-text articles against the inclusion criteria of this review. We resolved any disagreement through discussion with a third review author as required. We presented data descriptively using mean differences or medians, risk ratios and 95% confidence intervals. A meta-analysis was not possible due to the heterogeneity of the included studies. We assessed the quality of evidence with GRADE.

MAIN RESULTS

We included four RCTs (a total of 690 participants), in this review. Participants were adults who were mechanically ventilated in a general, medical or surgical ICU, with mean or median age in the studies ranging from 56 to 62 years. Admitting diagnoses in three of the four studies were indicative of critical illness, while participants in the fourth study had undergone cardiac surgery. Three studies included range-of-motion exercises, bed mobility activities, transfers and ambulation. The fourth study involved only upper limb exercises. Included studies were at high risk of performance bias, as they were not blinded to participants and personnel, and two of four did not blind outcome assessors. Three of four studies reported only on those participants who completed the study, with high rates of dropout. The description of intervention type, dose, intensity and frequency in the standard care control group was poor in two of four studies.Three studies (a total of 454 participants) reported at least one measure of physical function. One study (104 participants) reported low-quality evidence of beneficial effects in the intervention group on return to independent functional status at hospital discharge (59% versus 35%, risk ratio (RR) 1.71, 95% confidence interval (CI) 1.11 to 2.64); the absolute effect is that 246 more people (95% CI 38 to 567) per 1000 would attain independent functional status when provided with early mobilization. The effects on physical functioning are uncertain for a range measures: Barthel Index scores (early mobilization: median 75 control: versus 55, low quality evidence), number of ADLs achieved at ICU (median of 3 versus 0, low quality evidence) or at hospital discharge (median of 6 versus 4, low quality evidence). The effects of early mobilization on physical function measured at ICU discharge are uncertain, as measured by the Acute Care Index of Function (ACIF) (early mobilization mean: 61.1 versus control: 55, mean difference (MD) 6.10, 95% CI -11.85 to 24.05, low quality evidence) and the Physical Function ICU Test (PFIT) score (5.6 versus 5.4, MD 0.20, 95% CI -0.98 to 1.38, low quality evidence). There is low quality evidence that early mobilization may have little or no effect on physical function measured by the Short Physical Performance Battery score at ICU discharge from one study of 184 participants (mean 1.6 in the intervention group versus 1.9 in usual care, MD -0.30, 95% CI -1.10 to 0.50), or at hospital discharge (MD 0, 95% CI -1.00 to 0.90). The fourth study, which examined postoperative cardiac surgery patients did not measure physical function as an outcome.Adverse effects were reported across the four studies but we could not combine the data. Our certainty in the risk of adverse events with either mobilization strategy is low due to the low rate of events. One study reported that in the intervention group one out of 49 participants (2%) experienced oxygen desaturation less than 80% and one of 49 (2%) had accidental dislodgement of the radial catheter. This study also found cessation of therapy due to participant instability occurred in 19 of 498 (4%) of the intervention sessions. In another study five of 101 (5%) participants in the intervention group and five of 109 (4.6%) participants in the control group had postoperative pulmonary complications deemed to be unrelated to intervention. A third study found one of 150 participants in the intervention group had an episode of asymptomatic bradycardia, but completed the exercise session. The fourth study reported no adverse events.

AUTHORS' CONCLUSIONS

There is insufficient evidence on the effect of early mobilization of critically ill people in the ICU on physical function or performance, adverse events, muscle strength and health-related quality of life at this time. The four studies awaiting classification, and the three ongoing studies may alter the conclusions of the review once these results are available. We assessed that there is currently low-quality evidence for the effect of early mobilization of critically ill adults in the ICU due to small sample sizes, lack of blinding of participants and personnel, variation in the interventions and outcomes used to measure their effect and inadequate descriptions of the interventions delivered as usual care in the studies included in this Cochrane Review.

Can the critically ill patient generate sufficient energy to facilitate exercise in the ICU?

PURPOSE OF REVIEW

Trials of physical rehabilitation post critical illness have yet to deliver improved health-related quality of life in critical illness survivors. Muscle mass and strength are lost rapidly in critical illness and a proportion of patients continue to do so resulting in increased mortality and functional disability. Addressing this issue is therefore fundamental for recovery from critical illness.

RECENT FINDINGS

Altered mitochondrial function occurs in the critically ill and is likely to result in decreased adenosine tri-phosphate (ATP) production. Muscle contraction is a process that requires ATP. The metabolic demands of exercise are poorly understood in the ICU setting. Recent research has highlighted that there is significant heterogeneity in energy requirements between critically ill individuals undertaking the same functional activities, such as sit-to-stand. Nutrition in the critically ill is currently thought of in terms of carbohydrates, fat and protein. It may be that we need to consider nutrition in a more contextual manner such as energy generation or management of protein homeostasis.

SUMMARY

Current nutritional support practices in critically ill patients do not lead to improvements in physical and functional outcomes, and it may be that alternative methods of delivery or substrates are needed.