Validation of SeptiCyte RAPID to Discriminate Sepsis from Non-Infectious Systemic Inflammation.

(1) Background: SeptiCyte RAPID is a molecular test for discriminating sepsis from non-infectious systemic inflammation, and for estimating sepsis probabilities. The objective of this study was the clinical validation of SeptiCyte RAPID, based on testing retrospectively banked and prospectively collected patient samples. (2) Methods: The cartridge-based SeptiCyte RAPID test accepts a PAXgene blood RNA sample and provides sample-to-answer processing in ~1 h. The test output (SeptiScore, range 0-15) falls into four interpretation bands, with higher scores indicating higher probabilities of sepsis. Retrospective (N = 356) and prospective (N = 63) samples were tested from adult patients in ICU who either had the systemic inflammatory response syndrome (SIRS), or were suspected of having/diagnosed with sepsis. Patients were clinically evaluated by a panel of three expert physicians blinded to the SeptiCyte test results. Results were interpreted under either the Sepsis-2 or Sepsis-3 framework. (3) Results: Under the Sepsis-2 framework, SeptiCyte RAPID performance for the combined retrospective and prospective cohorts had Areas Under the ROC Curve (AUCs) ranging from 0.82 to 0.85, a negative predictive value of 0.91 (sensitivity 0.94) for SeptiScore Band 1 (score range 0.1-5.0; lowest risk of sepsis), and a positive predictive value of 0.81 (specificity 0.90) for SeptiScore Band 4 (score range 7.4-15; highest risk of sepsis). Performance estimates for the prospective cohort ranged from AUC 0.86-0.95. For physician-adjudicated sepsis cases that were blood culture (+) or blood, urine culture (+)(+), 43/48 (90%) of SeptiCyte scores fell in Bands 3 or 4. In multivariable analysis with up to 14 additional clinical variables, SeptiScore was the most important variable for sepsis diagnosis. A comparable performance was obtained for the majority of patients reanalyzed under the Sepsis-3 definition, although a subgroup of 16 patients was identified that was called septic under Sepsis-2 but not under Sepsis-3. (4) Conclusions: This study validates SeptiCyte RAPID for estimating sepsis probability, under both the Sepsis-2 and Sepsis-3 frameworks, for hospitalized patients on their first day of ICU admission.

Prospective Assessment of the Feasibility of a Trial of Low-Tidal Volume Ventilation for Patients with Acute Respiratory Failure.

RATIONALE: Low-tidal volume ventilation (LTVV; 6 ml/kg) benefits patients with acute respiratory distress syndrome and may aid those with other causes of respiratory failure. Current early ventilation practices are poorly defined. OBJECTIVES: We observed patients with acute respiratory failure to assess the feasibility of a pragmatic trial of LTVV and to guide experimental design. METHODS: We prospectively enrolled consecutive patients with acute respiratory failure admitted to intensive care units expected to participate in the proposed trial. We collected clinical data as well as information on initial and daily ventilator settings and inpatient mortality. We estimated the benefit of LTVV using predictive linear and nonlinear models. We simulated models to estimate power and feasibility of a cluster-randomized trial of LTVV versus usual care in acute respiratory failure. RESULTS: We included 2,484 newly mechanically ventilated patients (31% with acute respiratory distress syndrome) from 49 hospitals. Hospital mortality was 28%. Mean initial tidal volume was 7.1 ml/kg predicted body weight (95% confidence interval, 7.1-7.2), with 78% of patients receiving tidal volumes less than or equal to 8 ml/kg. Our models estimated a mortality benefit of 0-2% from LTVV compared with usual care. Simulation of a stepped-wedged cluster-randomized trial suggested that enrollment of 106,361 patients would be necessary to achieve greater than 90% power. CONCLUSIONS: Use of initial tidal volumes less than 8 ml/kg predicted body weight was common at hospitals participating in the National Heart, Lung, and Blood Institute Prevention and Early Treatment of Acute Lung Injury (PETAL) Network. After considering the size and budgetary requirement for a cluster-randomized trial of LTVV versus usual care in acute respiratory failure, the PETAL Network deemed the proposed trial infeasible. A rapid observational study and simulations to model anticipated power may help better design trials.

Newly Initiated In-Hospital Antipsychotics Continued at Discharge in Non-psychiatric Patients.

Objectives: Antipsychotics are commonly initiated in the hospital for agitation and delirium and may be inappropriately continued upon floor transfer and at discharge. We sought to evaluate the magnitude of this issue within our health care system. Methods: We conducted a multicenter, retrospective cohort study within a 22-hospital health care system to evaluate the proportion of patients without identifiable psychiatric illness who received newly initiated inpatient antipsychotics and were then continued on an antipsychotic at hospital discharge. Results: Of 23 049 patients who received at least 1 in-hospital dose of haloperidol, olanzapine, quetiapine, risperidone, or ziprasidone, 8297 patients were included in the final analysis after applying exclusion for identifiable psychiatric illness or previous antipsychotic use. Ultimately, 334 patients (4%) were discharged with a new antipsychotic prescription. Patients receiving antipsychotics at discharge were more likely as an inpatient to receive quetiapine (77.2% vs 35.9%; odds ratio [OR]: 6.1, 95% confidence interval [CI]: 4.7-8.0; P < .001) and less likely to receive haloperidol (15% vs 47%; OR: 0.2, 95% CI: 0.14-0.27; P < .001) or olanzapine (16.2% vs 20.9%; OR: 0.73, 95% CI: 0.53-0.98; P < .04). Conclusions: Antipsychotics may be inappropriately continued in non-psychiatric patients at hospital discharge. Strategies to limit potentially unnecessary antipsychotics upon discharge should be evaluated.

Validation of a Host Response Assay, SeptiCyte LAB, for Discriminating Sepsis from Systemic Inflammatory Response Syndrome in the ICU.

RATIONALE: A molecular test to distinguish between sepsis and systemic inflammation of noninfectious etiology could potentially have clinical utility. OBJECTIVES: This study evaluated the diagnostic performance of a molecular host response assay (SeptiCyte LAB) designed to distinguish between sepsis and noninfectious systemic inflammation in critically ill adults. METHODS: The study employed a prospective, observational, noninterventional design and recruited a heterogeneous cohort of adult critical care patients from seven sites in the United States (n = 249). An additional group of 198 patients, recruited in the large MARS (Molecular Diagnosis and Risk Stratification of Sepsis) consortium trial in the Netherlands ( www.clinicaltrials.gov identifier NCT01905033), was also tested and analyzed, making a grand total of 447 patients in our study. The performance of SeptiCyte LAB was compared with retrospective physician diagnosis by a panel of three experts. MEASUREMENTS AND MAIN RESULTS: In receiver operating characteristic curve analysis, SeptiCyte LAB had an estimated area under the curve of 0.82-0.89 for discriminating sepsis from noninfectious systemic inflammation. The relative likelihood of sepsis versus noninfectious systemic inflammation was found to increase with increasing test score (range, 0-10). In a forward logistic regression analysis, the diagnostic performance of the assay was improved only marginally when used in combination with other clinical and laboratory variables, including procalcitonin. The performance of the assay was not significantly affected by demographic variables, including age, sex, or race/ethnicity. CONCLUSIONS: SeptiCyte LAB appears to be a promising diagnostic tool to complement physician assessment of infection likelihood in critically ill adult patients with systemic inflammation. Clinical trial registered with www.clinicaltrials.gov (NCT01905033 and NCT02127502).

Valproate for agitation in critically ill patients: A retrospective study.

PURPOSE: The purpose was to describe the use of valproate therapy for agitation in critically ill patients, examine its safety, and describe its relationship with agitation and delirium. MATERIALS AND METHODS: This retrospective cohort study evaluated critically ill adults treated with valproate for agitation from December 2012 through February 2015. Information on valproate prescribing practices and safety was collected. Incidence of agitation, delirium, and concomitant psychoactive medication use was compared between valproate day 1 and valproate day 3. Concomitant psychoactive medication use was analyzed using mixed models. RESULTS: Fifty-three patients were evaluated. The median day of valproate therapy initiation was ICU day 7, and it was continued for a median of 7 days. The median maintenance dose was 1500 mg/d (23 mg/kg/d). The incidence of agitation (96% vs 61%, P < .0001) and delirium (68% vs 49%, P = .012) significantly decreased by valproate day 3. Treatment with opioids (77% vs 65%, P = .02) and dexmedetomidine (47% vs 24%, P = .004) also decreased. In mixed models analyses, valproate therapy was associated with reduced fentanyl equivalents (-185 µg/d, P = .0003) and lorazepam equivalents (-2.1 mg/d, P = .0004). Hyperammonemia (19%) and thrombocytopenia (13%) were the most commonly observed adverse effects. CONCLUSIONS: Valproate therapy was associated with a reduction in agitation, delirium, and concomitant psychoactive medication use within 48 hours of initiation.

Point Prevalence Study of Mobilization Practices for Acute Respiratory Failure Patients in the United States.

OBJECTIVE: Early mobility in mechanically ventilated patients is safe, feasible, and may improve functional outcomes. We sought to determine the prevalence and character of mobility for ICU patients with acute respiratory failure in U.S. ICUs. DESIGN: Two-day cross-sectional point prevalence study. SETTING: Forty-two ICUs across 17 Acute Respiratory Distress Syndrome Network hospitals. PATIENTS: Adult patients (≥ 18 yr old) with acute respiratory failure requiring mechanical ventilation. INTERVENTIONS: We defined therapist-provided mobility as the proportion of patient-days with any physical or occupational therapy-provided mobility event. Hierarchical regression models were used to identify predictors of out-of-bed mobility. MEASUREMENTS AND MAIN RESULTS: Hospitals contributed 770 patient-days of data. Patients received mechanical ventilation on 73% of the patient-days mostly (n = 432; 56%) ventilated via an endotracheal tube. The prevalence of physical therapy/occupational therapy-provided mobility was 32% (247/770), with a significantly higher proportion of nonmechanically ventilated patients receiving physical therapy/occupational therapy (48% vs 26%; p ≤ 0.001). Patients on mechanical ventilation achieved out-of-bed mobility on 16% (n = 90) of the total patient-days. Physical therapy/occupational therapy involvement in mobility events was strongly associated with progression to out-of-bed mobility (odds ratio, 29.1; CI, 15.1-56.3; p ≤ 0.001). Presence of an endotracheal tube and delirium were negatively associated with out-of-bed mobility. CONCLUSIONS: In a cohort of hospitals caring for acute respiratory failure patients, physical therapy/occupational therapy-provided mobility was infrequent. Physical therapy/occupational therapy involvement in mobility was strongly predictive of achieving greater mobility levels in patients with respiratory failure. Mechanical ventilation via an endotracheal tube and delirium are important predictors of mobility progression.

Variation in the Contents of Sepsis Bundles and Quality Measures. A Systematic Review.

RATIONALE: Sepsis contributes to one in every two to three inpatient hospital deaths. Early recognition and treatment are instrumental in reducing mortality, yet there are substantial quality gaps. Sepsis bundles containing quality metrics are often used in efforts to improve outcomes. Several prominent organizations have published their own bundles, but there are few head-to-head comparisons of content. OBJECTIVES: We sought to determine the degree of agreement on component elements of sepsis bundles and the associated timing goals for completion of each element. We additionally sought to evaluate the amount of variation between metrics associated with bundles. METHODS: We reviewed the components of and level of agreement among several sepsis resuscitation and management bundles. We compared the individual bundle elements, together with their associated goals and metrics. We performed a systematic review (PubMed 2008-2015) and searched publically available online content, supplemented by interviews with key informants, to identify eight distinct bundles. Bundles are presented as current as of April 2015. MEASUREMENTS AND MAIN RESULTS: Broadly, elements of care covered early resuscitation and short-term management. Bundles varied from 6 to 10 elements, and there were 12 distinct elements listed across all bundles. Only lactate collection and broad-spectrum antibiotics were common to all eight bundles, although there were seven elements included in at least 75% of the bundles. Timing goals for the collection of lactate and antibiotic administration varied among bundles from within 1 to 6 hours of diagnosis or admission. Notably, no bundle included metrics evaluating timeliness or completeness of sepsis recognition. CONCLUSIONS: There is a lack of consensus on component elements and timing goals across highly recognized sepsis bundles. These differences highlight an urgent need for comparative effectiveness research to guide future implementation and for metrics to evaluate progress. None of the widely instituted bundles include metrics to evaluate sepsis recognition or diagnostic accuracy.

Clinical study replicability and the pursuit of excellence.

Comparisons of processes of care are common in critical care research. Often, these processes are neither explicit nor replicable and this can result in seemingly irreconcilable results. Here, we briefly review the article by Taniguchi and colleagues, who studied liberation from mechanical ventilation by using either a computerized weaning protocol or one driven by respiratory therapists. We discuss the implications of explicit protocols increasing replicability in clinical research.

Fluid management with a simplified conservative protocol for the acute respiratory distress syndrome*.

OBJECTIVES: In the Fluid and Catheter Treatment Trial (FACTT) of the National Institutes of Health Acute Respiratory Distress Syndrome Network, a conservative fluid protocol (FACTT Conservative) resulted in a lower cumulative fluid balance and better outcomes than a liberal fluid protocol (FACTT Liberal). Subsequent Acute Respiratory Distress Syndrome Network studies used a simplified conservative fluid protocol (FACTT Lite). The objective of this study was to compare the performance of FACTT Lite, FACTT Conservative, and FACTT Liberal protocols. DESIGN: Retrospective comparison of FACTT Lite, FACTT Conservative, and FACTT Liberal. Primary outcome was cumulative fluid balance over 7 days. Secondary outcomes were 60-day adjusted mortality and ventilator-free days through day 28. Safety outcomes were prevalence of acute kidney injury and new shock. SETTING: ICUs of Acute Respiratory Distress Syndrome Network participating hospitals. PATIENTS: Five hundred three subjects managed with FACTT Conservative, 497 subjects managed with FACTT Liberal, and 1,124 subjects managed with FACTT Lite. INTERVENTIONS: Fluid management by protocol. MEASUREMENTS AND MAIN RESULTS: Cumulative fluid balance was 1,918 ± 323 mL in FACTT Lite, -136 ± 491 mL in FACTT Conservative, and 6,992 ± 502 mL in FACTT Liberal (p < 0.001). Mortality was not different between groups (24% in FACTT Lite, 25% in FACTT Conservative and Liberal, p = 0.84). Ventilator-free days in FACTT Lite (14.9 ± 0.3) were equivalent to FACTT Conservative (14.6 ± 0.5) (p = 0.61) and greater than in FACTT Liberal (12.1 ± 0.5, p < 0.001 vs Lite). Acute kidney injury prevalence was 58% in FACTT Lite and 57% in FACTT Conservative (p = 0.72). Prevalence of new shock in FACTT Lite (9%) was lower than in FACTT Conservative (13%) (p = 0.007 vs Lite) and similar to FACTT Liberal (11%) (p = 0.18 vs Lite). CONCLUSIONS: FACTT Lite had a greater cumulative fluid balance than FACTT Conservative but had equivalent clinical and safety outcomes. FACTT Lite is an alternative to FACTT Conservative for fluid management in Acute Respiratory Distress Syndrome.

Platelet-monocyte aggregate formation and mortality risk in older patients with severe sepsis and septic shock.

BACKGROUND: Aging-related changes in platelet and monocyte interactions may contribute to adverse outcomes in sepsis but remain relatively unexamined. We hypothesized that differential platelet-monocyte aggregate (PMA) formation in older septic patients alters inflammatory responses and mortality. METHODS: We prospectively studied 113 septic adults admitted to the intensive care unit with severe sepsis or septic shock. Patients were dichotomized a priori into one of two groups: older (age ≥ 65 years, n = 28) and younger (age < 65 years, n = 85). PMA levels were measured in whole blood via flow cytometry within 24 hours of admission. Plasma levels of IL-6 and IL-8, proinflammatory cytokines produced by monocytes upon PMA formation, were determined by commercial assays. Patients were followed for the primary outcome of 28-day, all-cause mortality. RESULTS: Elevated PMA levels were associated with an increased risk of mortality in older septic patients (hazard ratio for mortality 5.64, 95% confidence interval 0.64-49.61). This association remained after adjusting for potential confounding variables in multivariate regression. Receiver operating curve analyses demonstrated that PMA levels greater than or equal to 8.43% best predicted 28-day mortality in older septic patients (area under the receiver operating curve 0.82). Plasma IL-6 and IL-8 levels were also significantly higher in older nonsurvivors. In younger patients, neither PMA levels nor plasma monokines were significantly associated with mortality. CONCLUSIONS: Increased PMA formation, and associated proinflammatory monokine synthesis, predicts mortality in older septic patients. Although larger studies are needed, our findings suggest that heightened PMA formation in older septic patients may contribute to injurious inflammatory responses and an increased risk of mortality.

Multicenter implementation of a severe sepsis and septic shock treatment bundle.

RATIONALE: Severe sepsis and septic shock are leading causes of intensive care unit (ICU) admission, morbidity, and mortality. The effect of compliance with sepsis management guidelines on outcomes is unclear. OBJECTIVES: To assess the effect on mortality of compliance with a severe sepsis and septic shock management bundle. METHODS: Observational study of a severe sepsis and septic shock bundle as part of a quality improvement project in 18 ICUs in 11 hospitals in Utah and Idaho. MEASUREMENTS AND MAIN RESULTS: Among 4,329 adult subjects with severe sepsis or septic shock admitted to study ICUs from the emergency department between January 2004 and December 2010, hospital mortality was 12.1%, declining from 21.2% in 2004 to 8.7% in 2010. All-or-none total bundle compliance increased from 4.9-73.4% simultaneously. Mortality declined from 21.7% in 2004 to 9.7% in 2010 among subjects noncompliant with one or more bundle element. Regression models adjusting for age, severity of illness, and comorbidities identified an association between mortality and compliance with each of inotropes and red cell transfusions, glucocorticoids, and lung-protective ventilation. Compliance with early resuscitation elements during the first 3 hours after emergency department admission caused ineligibility, through lower subsequent severity of illness, for these later bundle elements. CONCLUSIONS: Total severe sepsis and septic shock bundle compliances increased substantially and were associated with a marked reduction in hospital mortality after adjustment for age, severity of illness, and comorbidities in a multicenter ICU cohort. Early resuscitation bundle element compliance predicted ineligibility for subsequent bundle elements.

Survival after shock requiring high-dose vasopressor therapy.

BACKGROUND: Some patients with hypotensive shock do not respond to usual doses of vasopressor therapy. Very little is known about outcomes after high-dose vasopressor therapy (HDV). We sought to characterize survival among patients with shock requiring HDV. We also evaluated the possible utility of stress-dose corticosteroid therapy in these patients. METHODS: We conducted a retrospective study of patients with shock requiring HDV in the ICUs of five hospitals from 2005 through 2010. We defined HDV as receipt at any point of ≥ 1 µg/kg/min of norepinephrine equivalent (calculated by summing norepinephrine-equivalent infusion rates of all vasopressors). We report survival 90 days after hospital admission. We evaluated receipt of stress-dose corticosteroids, cause of shock, receipt of CPR, and withdrawal or withholding of life support therapy. RESULTS: We identified 443 patients meeting inclusion criteria. Seventy-six (17%) survived. Survival was similar (20%) among the 241 patients with septic shock. Among the 367 nonsurvivors, 254 (69%) experienced withholding/withdrawal of care, and 115 (31%) underwent CPR. Stress-dose corticosteroid therapy was associated with increased survival (P = .01). CONCLUSIONS: One in six patients with shock survived to 90 days after HDV. The majority of nonsurvivors died after withdrawal or withholding of life support therapy. A minority of patients underwent CPR. Additionally, stress-dose corticosteroid therapy appears reasonable in patients with shock requiring HDV.

Extracorporeal membrane oxygenation in adults with acute respiratory distress syndrome.

PURPOSE OF REVIEW: To evaluate the last 2 years' publications for evidence supporting use of extracorporeal membrane oxygenation (ECMO) for critically ill adults with acute respiratory distress syndrome (ARDS). RECENT FINDINGS: First, there are no new prospective studies comparing ECMO and other therapy in adults with ARDS. Second, the number of review articles and case descriptions published in the last 2 years suggests increased interest in ECMO. Third, recently published retrospective cohort studies analyzing patients from the H1N1 epidemic report conflicting conclusions. SUMMARY: Intensivists may have increased their utilization of ECMO. Credible evidence for mortality benefit of ECMO is lacking. A prospective randomized controlled trial designed to evaluate the efficacy of ECMO for ARDS is overdue.

The association between brain volumes, delirium duration, and cognitive outcomes in intensive care unit survivors: the VISIONS cohort magnetic resonance imaging study*.

OBJECTIVE: Delirium duration is predictive of long-term cognitive impairment in intensive care unit survivors. Hypothesizing that a neuroanatomical basis may exist for the relationship between delirium and long-term cognitive impairment, we conducted this exploratory investigation of the associations between delirium duration, brain volumes, and long-term cognitive impairment. DESIGN, SETTING, AND PATIENTS: A prospective cohort of medical and surgical intensive care unit survivors with respiratory failure or shock. MEASUREMENTS: Quantitative high resolution 3-Tesla brain magnetic resonance imaging was used to calculate brain volumes at discharge and 3-month follow-up. Delirium was evaluated using the confusion assessment method for the intensive care unit; cognitive outcomes were tested at 3- and 12-month follow-up. Linear regression was used to examine associations between delirium duration and brain volumes, and between brain volumes and cognitive outcomes. RESULTS: A total of 47 patients completed the magnetic resonance imaging protocol. Patients with longer duration of delirium displayed greater brain atrophy as measured by a larger ventricle-to-brain ratio at hospital discharge (0.76, 95% confidence intervals [0.10, 1.41]; p = .03) and at 3-month follow-up (0.62 [0.02, 1.21], p = .05). Longer duration of delirium was associated with smaller superior frontal lobe (-2.11 cm(3) [-3.89, -0.32]; p = .03) and hippocampal volumes at discharge (-0.58 cm(3) [-0.85, -0.31], p < .001)--regions responsible for executive functioning and memory, respectively. Greater brain atrophy (higher ventricle-to-brain ratio) at 3 months was associated with worse cognitive performances at 12 months (lower Repeatable Battery for the Assessment of Neuropsychological Status score -11.17 [-21.12, -1.22], p = .04). Smaller superior frontal lobes, thalamus, and cerebellar volumes at 3 months were associated with worse executive functioning and visual attention at 12 months. CONCLUSIONS: These preliminary data show that longer duration of delirium is associated with smaller brain volumes up to 3 months after discharge, and that smaller brain volumes are associated with long-term cognitive impairment up to 12 months. We cannot, however, rule out that smaller preexisting brain volumes explain these findings.

The relationship between delirium duration, white matter integrity, and cognitive impairment in intensive care unit survivors as determined by diffusion tensor imaging: the VISIONS prospective cohort magnetic resonance imaging study*.

OBJECTIVE: Evidence is emerging that delirium duration is a predictor of long-term cognitive impairment in intensive care unit survivors. Relationships between 1) delirium duration and brain white matter integrity, and 2) white matter integrity and long-term cognitive impairment are poorly understood and could be explored using magnetic resonance imaging. DESIGN, SETTING, PATIENTS: A two-center, prospective cohort study incorporating delirium monitoring, neuroimaging, and cognitive testing in intensive care unit survivors. MEASUREMENTS: Delirium was evaluated with the Confusion Assessment Method for the Intensive Care Unit and cognitive outcomes were tested at 3 and 12-month follow-up. Following the intensive care unit stay, fractional anisotropy, a measure of white matter integrity, was calculated quantitatively using diffusion tensor imaging with a 3-T magnetic resonance imaging scanner at hospital discharge and 3-month follow-up. We examined associations between 1) delirium duration and fractional anisotropy and 2) fractional anisotropy and cognitive outcomes using linear regression adjusted for age and sepsis. RESULTS: A total of 47 patients with a median age of 50 yrs completed the diffusion tensor imaging-magnetic resonance imaging protocol. Greater duration of delirium (3 vs. 0 days) was associated with lower fractional anisotropy (i.e., reduced fractional anisotropy = white matter disruption) in the genu (-0.02; p = .04) and splenium (-0.01; p = .02) of the corpus callosum and anterior limb of the internal capsule (-0.02; p =.01) at hospital discharge. These associations persisted at 3 months for the genu (-0.02; p =.02) and splenium (-0.01; p = .004). Lower fractional anisotropy in the anterior limb of internal capsule at discharge and in genu of corpus callosum at three months was associated with worse cognitive scores at 3 and 12 months. CONCLUSIONS: In this pilot investigation, delirium duration in the intensive care unit was associated with white matter disruption at both discharge and 3 months. Similarly, white matter disruption was associated with worse cognitive scores up to 12 months later. This hypothesis-generating investigation may help design future studies to explore these complex relationships in greater depth.

Physical therapy on the wards after early physical activity and mobility in the intensive care unit.

BACKGROUND: Weakness and debilitation are common following critical illness. Studies that assess whether early physical activity initiated in the intensive care unit (ICU) continues after a patient is transferred to a ward are lacking. OBJECTIVE: The purpose of this study was to assess whether physical activity and mobility initiated during ICU treatment were maintained after patients were discharged from a single ICU to a ward. DESIGN: This was a cohort study. METHODS: Consecutive patients who were diagnosed with respiratory failure and admitted to the respiratory ICU (RICU) at LDS Hospital underwent early physical activity and mobility as part of usual care. Medical data, the number of requests for a physical therapy consultation or nursing assistance with ambulation at ICU discharge, and mobility data were collected during the first 2 full days on the ward. RESULTS: Of the 72 patients who participated in the study, 65 had either a physical therapy consultation or a request for nursing assistance with ambulation at ward transfer. Activity level decreased in 40 participants (55%) on the first full ward day. Of the 61 participants who ambulated 100 ft (30.48 m) or more on the last full RICU day, 14 did not ambulate, 22 ambulated less than 100 ft, and 25 ambulated 100 ft or more on the first ward day. LIMITATIONS: Limitations include lack of data regarding why activity was not performed on the ward, lack of longitudinal follow-up to assess effects of activity, and lack of generalizability to patients not transferred to a ward or not treated in an ICU with an early mobility program. CONCLUSIONS: Despite the majority of participants having a physical therapy consultation or a request for nursing assistance with ambulation at the time of transfer to the medical ward, physical activity levels decreased in over half of participants on the first full ward day. The data suggest a need for education of ward staff regarding ICU debilitation, enhanced communication among care providers, and focus on the importance of patient-centered outcomes during and following ICU treatment.

Critical illness from 2009 pandemic influenza A virus and bacterial coinfection in the United States.

OBJECTIVES: The contribution of bacterial coinfection to critical illness associated with 2009 influenza A virus infection remains uncertain. The objective of this study was to determine whether bacterial coinfection increased the morbidity and mortality of 2009 influenza A. DESIGN: Retrospective and prospective cohort study. SETTING: Thirty-five adult U.S. intensive care units over the course of 1 yr. PATIENTS: Six hundred eighty-three critically ill adults with confirmed or probable 2009 influenza A. INTERVENTIONS: None. MEASUREMENTS AND MAIN RESULTS: A confirmed or probable case was defined as a positive 2009 influenza A test result or positive test for influenza A that was otherwise not subtyped. Bacterial coinfection was defined as documented bacteremia or any presumed bacterial pneumonia with or without positive respiratory tract culture within 72 hrs of intensive care unit admission. The mean age was 45±16 yrs, mean body mass index was 32.5±11.1 kg/m, and mean Acute Physiology and Chronic Health Examination II score was 21±9, with 76% having at least one comorbidity. Of 207 (30.3%) patients with bacterial coinfection on intensive care unit admission, 154 had positive cultures with Staphylococcus aureus (n=57) and Streptococcus pneumoniae (n=19), the most commonly identified pathogens. Bacterial coinfected patients were more likely to present with shock (21% vs. 10%; p=.0001), require mechanical ventilation at the time of intensive care unit admission (63% vs. 52%; p=.005), and have longer duration of intensive care unit care (median, 7 vs. 6 days; p=.05). Hospital mortality was 23%; 31% in bacterial coinfected patients and 21% in patients without coinfection (p=.002). Immunosuppression (relative risk 1.57; 95% confidence interval 1.20 -2.06; p=.0009) and Staphylococcus aureus at admission (relative risk 2.82; 95% confidence interval 1.76-4.51; p<.0001) were independently associated with increased mortality. CONCLUSIONS: Among intensive care unit patients with 2009 influenza A, bacterial coinfection diagnosed within 72 hrs of admission, especially with Staphylococcus aureus, was associated with significantly higher morbidity and mortality.

Ventilator management for hypoxemic respiratory failure attributable to H1N1 novel swine origin influenza virus.

Novel H1N1 swine origin influenza virus has led to a worldwide pandemic. During the pandemic, a significant number of patients became critically ill primarily because of respiratory failure. Most of these patients required intubation and mechanical ventilation and were treated with conventional modes of mechanical ventilation using a lung-protective strategy with low tidal volumes, plateau pressures <30 to 35 cm H2O, and optimal positive end-expiratory pressure. In some patients with persistent hypoxemia, alternative modes of ventilation, such as high-frequency oscillatory ventilation and airway pressure release ventilation, were used. We review the ventilatory management, recruitment maneuvers, prone positioning, and goals of ventilatory therapy for hypoxemic respiratory failure in general, as well as lessons learned in the management of H1N1-related respiratory failure.