Safety, feasibility, and impact on the gut microbiome of kefir administration in critically ill adults

BACKGROUND

Dysbiosis of the gut microbiome is frequent in the intensive care unit (ICU), potentially leading to a heightened risk of nosocomial infections. Enhancing the gut microbiome has been proposed as a strategic approach to mitigate potential adverse outcomes. While prior research on select probiotic supplements has not successfully shown to improve gut microbial diversity, fermented foods offer a promising alternative. In this open-label phase I safety and feasibility study, we examined the safety and feasibility of kefir as an initial step towards utilizing fermented foods to mitigate gut dysbiosis in critically ill patients.

METHODS

We administered kefir in escalating doses (60 mL, followed by 120 mL after 12 h, then 240 mL daily) to 54 critically ill patients with an intact gastrointestinal tract. To evaluate kefir's safety, we monitored for gastrointestinal symptoms. Feasibility was determined by whether patients received a minimum of 75% of their assigned kefir doses. To assess changes in the gut microbiome composition following kefir administration, we collected two stool samples from 13 patients: one within 72 h of admission to the ICU and another at least 72 h after the first stool sample.

RESULTS

After administering kefir, none of the 54 critically ill patients exhibited signs of kefir-related bacteremia. No side effects like bloating, vomiting, or aspiration were noted, except for diarrhea in two patients concurrently on laxatives. Out of the 393 kefir doses prescribed for all participants, 359 (91%) were successfully administered. We were able to collect an initial stool sample from 29 (54%) patients and a follow-up sample from 13 (24%) patients. Analysis of the 26 paired samples revealed no increase in gut microbial α-diversity between the two timepoints. However, there was a significant improvement in the Gut Microbiome Wellness Index (GMWI) by the second timepoint (P = 0.034, one-sided Wilcoxon signed-rank test); this finding supports our hypothesis that kefir administration can improve gut health in critically ill patients. Additionally, the known microbial species in kefir were found to exhibit varying levels of engraftment in patients' guts.

CONCLUSIONS

Providing kefir to critically ill individuals is safe and feasible. Our findings warrant a larger evaluation of kefir's safety, tolerability, and impact on gut microbiome dysbiosis in patients admitted to the ICU.

TRIAL REGISTRATION

NCT05416814; trial registered on June 13, 2022.

The human gut microbiome in critical illness: disruptions, consequences, and therapeutic frontiers

With approximately 39 trillion cells and over 20 million genes, the human gut microbiome plays an integral role in both health and disease. Modern living has brought a widespread use of processed food and beverages, antimicrobial and immunomodulatory drugs, and invasive procedures, all of which profoundly disrupt the delicate homeostasis between the host and its microbiome. Of particular interest is the human gut microbiome, which is progressively being recognized as an important contributing factor in many aspects of critical illness, from predisposition to recovery. Herein, we describe the current understanding of the adverse impacts of standard intensive care interventions on the human gut microbiome and delve into how these microbial alterations can influence patient outcomes. Additionally, we explore the potential association between the gut microbiome and post-intensive care syndrome, shedding light on a previously underappreciated avenue that may enhance patient recuperation following critical illness. There is an impending need for future epidemiological studies to encompass detailed phenotypic analyses of gut microbiome perturbations. Interventions aimed at restoring the gut microbiome represent a promising therapeutic frontier in the quest to prevent and treat critical illnesses.

Gut Microbiome Wellness Index 2 for Enhanced Health Status Prediction from Gut Microbiome Taxonomic Profiles

Recent advancements in human gut microbiome research have revealed its crucial role in shaping innovative predictive healthcare applications. We introduce Gut Microbiome Wellness Index 2 (GMWI2), an advanced iteration of our original GMWI prototype, designed as a robust, disease-agnostic health status indicator based on gut microbiome taxonomic profiles. Our analysis involved pooling existing 8069 stool shotgun metagenome data across a global demographic landscape to effectively capture biological signals linking gut taxonomies to health. GMWI2 achieves a cross-validation balanced accuracy of 80% in distinguishing healthy (no disease) from non-healthy (diseased) individuals and surpasses 90% accuracy for samples with higher confidence (i.e., outside the "reject option"). The enhanced classification accuracy of GMWI2 outperforms both the original GMWI model and traditional species-level α-diversity indices, suggesting a more reliable tool for differentiating between healthy and non-healthy phenotypes using gut microbiome data. Furthermore, by reevaluating and reinterpreting previously published data, GMWI2 provides fresh insights into the established understanding of how diet, antibiotic exposure, and fecal microbiota transplantation influence gut health. Looking ahead, GMWI2 represents a timely pivotal tool for evaluating health based on an individual's unique gut microbial composition, paving the way for the early screening of adverse gut health shifts. GMWI2 is offered as an open-source command-line tool, ensuring it is both accessible to and adaptable for researchers interested in the translational applications of human gut microbiome science.

Humanizing the Intensive Care Unit: Perspectives of Patients and Families on the Get to Know Me Board

In this qualitative study, we explored perspectives of patients in the intensive care unit (ICU) and their families on the Get to Know Me board (GTKMB). Of the 46 patients approached, 38 consented to participate. Of the 66 family members approached, 60 consented to participate. Most patients (26, 89%) and family members (52, 99%) expressed that GTKMB was important in recognizing patient's humanity. Most patients (20, 68%) and families (39, 74%) said that it helped to build a better relationship with the provider team. 60% of patients and families commented that the GTKMB was used as a platform by providers to interact with them. Up to 45 (85%) of the family members supported specific contents of the GTKMB. In structured interviews (11 patients, 7 family members), participants additionally commented on ways providers used the GTKMB to communicate, support patient's personhood, and on caveats in interacting with GTKMB. Critically ill patients and families found the GTKMB helpful in preserving personhood of patient, fostering communication, and building relationships with clinicians.

Aloud real- time reading of intensive care unit diaries: A feasibility study

OBJECTIVES

Memories of frightening/delusional intensive care unit experiences are a major risk factor for subsequent psychiatric morbidity of critical illness survivors; factual memories are protective. Systematically providing factual information during initial memory consolidation could mitigate the emotional character of the formed memories. We explored feasibility and obtained stakeholder feedback of a novel approach to intensive care unit diaries whereby entries were read aloud to the patients right after they were written to facilitate systematic real time orientation and formation of factual memories.

RESEARCH METHODOLOGY

Prospective interventional pilot study involving reading diary entries aloud. We have also interviewed involved stakeholders for feedback and collected exploratory data on psychiatric symptoms from patients right after the intensive care stay.

SETTING

Various intensive care units in a single academic center.

MAIN OUTCOME MEASURES

Feasibility was defined as intervention delivery on ≥80% of days following patient recruitment. Content analysis was performed on stakeholder interview responses. Questionnaire data were compared for patients who received real-time reading to the historical cohort who did not.

RESULTS

Overall, 57% (17 of 30) of patients achieved the set feasibility threshold. Following protocol adjustment, we achieved 86% feasibility in the last subset of patients. Patients reported the intervention as comforting and appreciated the reorientation aspect. Nurses overwhelmingly liked the idea; most common concern was not knowing what to write. Some therapists were unsure whether reading entries aloud might overwhelm the patients. There were no significant differences in psychiatric symptoms when compared to the historic cohort.

CONCLUSION

We encountered several implementation obstacles; once these were addressed, we achieved set feasibility target for the last group of patients. Reading diary entries aloud was welcomed by stakeholders. Designing a trial to assess efficacy of the intervention on psychiatric outcomes appears warranted.

IMPLICATIONS FOR CLINICAL PRACTICE

There is no recommendation to change current practice as benefits of the intervention are unproven.

Determining Goal Concordant Care in the Intensive Care Unit Using Electronic Health Records

BACKGROUND

Goal concordant care (GCC) is the alignment of care to patient values and preferences. GCC is a major outcome of communication with patients and families in serious/critical illness. Using the electronic health record (EHR) to study the provision of GCC would be pragmatic and cost-effective for research and quality improvement efforts.

RESEARCH QUESTION

Do EHRs contain information to identify GCC?

METHODS

This is a feasibility retrospective chart review performed by two independent reviewers. An existing framework containing four questions for identifying GCC was adopted. Two clinicians reviewed multi-disciplinary notes and extracted pertinent information. The primary outcomes were whether the four key questions for determining goal concordance could be answered using information in the EHR. The secondary outcome was the type of goals identified. Cohen's kappa was used to measure agreement between two reviewers.

RESULTS

Patient care was considered goal concordant in 35 (85%) of 41 patients in a random sample comprising of 36 survivors and five who died in hospital. Inter-rater agreement on identifying data to determine GCC was excellent (Kappa 0.70). Patient goals were identified in 80% of charts reviewed. Note sources informative of patient preferences, included social work (39%), hospital progress notes (29%), palliative care (20%), and physical/occupational therapy (15%). "Returning home" and "getting better/ stronger" were among the most common patient goals captured in EHR.

CONCLUSION

The EHR can be used to understand patient goals, but the information is scattered across the multi-disciplinary notes. Improving EHR and external validation will facilitate ascertainment of goal concordance as an important outcome measure.

Psychiatry's role in the prevention of post-intensive care mental health impairment: stakeholder survey

BACKGROUND

Many critical illness survivors experience new or worsening mental health impairments. Psychiatry consultation services can provide a critical role in identifying, addressing, and preventing mental health challenges during and after admission to the acute medical care setting. However, psychiatry involvement in the ICU setting is lower than in other hospital settings and the conventional process in many hospitals requires other care providers to request consultation by psychiatry. Despite these differences, no studies have sought ICU provider perspectives on psychiatry consultation's current and desired role. We aimed to obtain stakeholder feedback on psychiatry's current and desired roles in the ICU, and potential benefits and drawbacks of increasing psychiatry's presence.

METHODS

A web-based survey obtained perspectives from 373 critical care physicians and advance practice providers, bedside nurses, physical and occupational therapists, pharmacists, and consultation-liaison psychiatry physicians and advance practice providers at a tertiary care center using multiple choice and open-ended questions. Descriptive information and content analysis of qualitative data provided information on stakeholder perspectives.

RESULTS

Psychiatry's primary current role was seen as assistance with management of mental health issues (38%) and suicide risk assessments (23%). 46% wished for psychiatry's increased involvement in the ICU. Perceived benefits of increased psychiatry presence in the ICU included early psychological support in parallel with medical care, identification of psychiatric factors impacting treatment, and facilitation of family understanding of the patient's mental state/delirium. An additional perceived benefit included reduction in provider burnout through processing difficult situations and decreasing family psychological distress. However, one concern included potential conflict among providers regarding treatment.

CONCLUSIONS

Those who work closely with the critically ill patients think that increased psychological support in the ICU would be beneficial. By contrast, psychiatry's current involvement is seen to be limited, perhaps driven by varying perceptions of what psychiatry's role is or should be.

A pilot study of trained ICU doulas providing early psychological support to critically ill patients

Background

Over a third of critical illness survivors suffer from mental health problems following hospitalization. Memories of delusional experiences are a major risk factor. In this project, ICU doulas delivered a unique positive suggestion intervention targeting the vulnerable time period during critical illness when these memories are formed.

Methods

Adult critically ill patients were recruited for this single-arm, prospective pilot study. These ICU patients received a positive suggestion intervention daily during their ICU stay in parallel with their medical treatment. The intervention was designed to be delivered over a minimum of two sessions. Feasibility was defined as intervention delivery on ≥ 70% of ICU days after patient enrollment. As a secondary analysis, psychometric questionnaires were compared to those of a historic control cohort of patients receiving standard care in the ICU using adjusted linear regression models.

Results

Of the 97 patients who received the intervention and were alive at the end of their ICU course, 54 were excluded from analyses mostly for having received only one session because of a short ICU length of stay of < 2 days, transitioning to comfort care or not wanting to answer the study questionnaires. Forty-three patients who completed 2 or more sessions of the positive therapeutic suggestion intervention provided by two trained ICU doulas received it for a median of 4 days (IQR 3, 5), with each session lasting for a median of 20 min (IQR 14, 25). The intervention was delivered on 71% of days, meeting our pre-determined feasibility goal. Compared to historical controls (N = 299), patients receiving the intervention had higher severity of illness and longer length of stay. When adjusted for baseline differences, patients both with and without mechanical ventilation who received the intervention scored lower on the Hospital Anxiety and Depression Scale (HADS)—Depression subscale. The intervention was also associated with reduced HADS-Anxiety subscale among ventilated patients.

Conclusions

Positive therapeutic suggestion delivered by ICU doulas is feasible in the ICU setting. A randomized trial is warranted to better delineate the role that positive suggestion and ICU doulas may play in ongoing interprofessional efforts to humanize critical care medicine.

The study was registered on clinicaltrials.gov (NCT03736954) on 03/14/2018 prior to the first patient enrollment https://clinicaltrials.gov/ct2/show/NCT03736954?cond=ICU+Doulas+Providing+Psychological+Support&draw=2&rank=1.

Supplementary Information

The online version contains supplementary material available at 10.1186/s13054-021-03856-3.

Stress and Fear: Clinical Implications for Providers and Patients (in the Time of COVID-19 and Beyond)

In light of the coronavirus disease 2019 pandemic, we explore the role of stress, fear, and the impact of positive and negative emotions on health and disease. We then introduce strategies to help mitigate stress within the health care team, and provide a rationale for their efficacy. Additionally, we identify strategies to optimize patient care and explain their heightened importance in today's environment.

Feasibility of a Behavioral Intervention to Reduce Psychological Distress in Mechanically Ventilated Patients

Many survivors of acute respiratory failure suffer from mood disorders following discharge from the hospital. We investigated the feasibility of intensivists delivering psychological support based on positive suggestion (PSBPS) to 20 intubated patients to reduce their psychological distress. Thirteen patients completed follow-up surveys. Of those, 9 remembered the intensive care unit physician talking to them, and 7 described it as comforting. Five patients (38%) met criteria for anxiety, depression, and acute stress. In comparison to historical controls, intervention may be associated with lower estimated odds of anxiety. PSBPS can be performed with patients in parallel with medical treatment to potentially reduce psychological morbidity and to humanize critical care. A larger randomized study is warranted to assess the efficacy of PSBPS.

Psychocognitive sequelae of critical illness and correlation with 3 months follow up

PURPOSE

Over a third of critical illness survivors manifest significant psychocognitive impairments following discharge from the intensive care unit (ICU). It is not known which patient populations are at highest risk or if assessment at ICU discharge can guide outpatient treatment prioritization.

MATERIALS AND METHODS

Prospective single center study in an academic medical center encompassing six types of ICUs assessed prevalence of psychocognitive morbidity based on ICU type and associations between initial and 3 month follow-up evaluation. Adult patients with >48 h ICU stays completed the Hospital Anxiety and Depression Scale (HADS), Impact of Events Scale-Revised (IES-R), and Montreal Cognitive Assessment-Blind (MoCA-blind).

RESULTS

Of 299 patients who underwent initial assessment, 174 (58%) completed follow-up. Length of stay, MoCA-Blind, HADS-A/D and IES-R scores were similar across ICUs. Most commonly observed impairment in-hospital was cognitive (58%) followed by anxiety (45%), acute stress (39%) and depression (37%). There were significant correlations between in-hospital and follow-up psychocognitive outcomes.

CONCLUSIONS

There was no significant difference in impairment by ICU type. Significant correlation between the initial assessment and follow-up scores suggests that early screening of high risk patients may identify those at greatest risk of sustained morbidity and facilitate timely intervention.

Perspectives of physicians and nurses on identifying and treating psychological distress of the critically ill

PURPOSE

Survivors of critical illness are frequently unable to return to their premorbid level of psychocognitive functioning following discharge. Therefore, we aimed to evaluate the burden of psychological trauma experienced by patients in the intensive care unit (ICU) as perceived by clinicians to assess factors that can impede its recognition and treatment in the ICU.

MATERIALS AND METHODS

Two distinct role-specific Web-based surveys were administered to critical care physicians and nurses in medical and surgical ICUs of 2 academic medical centers. Responses were analyzed in the domains of psychological trauma, exacerbating/mitigating factors, and provider-patient communication.

RESULTS

A survey was completed by 43 physicians and 55 nurses with a response rate of 62% and 37%, respectively. Among physicians, 65% consistently consider the psychological state of the patient in decision making; 77% think it is important to introduce a system to document psychological state of ICU patients; 56% would like to have more time to communicate with patients; 77% consistently spend extra time at bedside besides rounds and often hold patient's hand/reassure them. Notably, for the question about the average level of psychological stress experienced by a patient in the ICU (with 0=no stress and 100=worst stress imaginable) during initial treatment stage and by the end of the ICU stay, median assessment by both physicians and nurses was 80 for the initial stress level and 68 for the stress level by the end of the ICU stay. Among nurses, 69% always try to minimize noise and 73% actively promote patient's rest. Physicians and nurses provided multiple specific suggestions for improving ICU environment and communication.

CONCLUSIONS

Both physicians and nurses acknowledge that they perceive that critically ill patients experience a high level of psychological stress that persists throughout their period of illness. Improved understanding of this phenomenon is needed to design effective therapeutic interventions. Although the lack of time is identified as significant barrier to ameliorating patient's psychological stress, the majority of clinicians indicate that they attempt to provide interventions to achieve this goal.

Early Psychological Therapy in Critical Illness

Survivors of critical illness often experience long-lasting impairments in mental, cognitive, and physical functioning. Acute stress reactions and delusional memories appear to play an important role in psychological morbidity following critical illness, and few interventions exist to address these symptoms. This review elucidates acute psychological stressors experienced by the critically ill. The effects of psychological stress and state of mind on disease are discussed using examples from the non-intensive care unit (ICU) literature, including a review of placebo and nocebo effects. After reviewing the effect of the mind on both psychological and physiological outcomes, we then focus on the role of memories-including their malleable nature and the consequences of false memories. Memory may play a role in the genesis of subsequent psychological trauma. Traumatic memories may begin forming even before the patient arrives in the ICU and during their state of unconsciousness in the ICU. Hence, practical interventions for redirecting patients' thoughts, such as positive suggestion techniques and actively involving patients in the treatment process as early as possible, are worthy of further investigation.

Effect of prolonged therapeutic hypothermia on intracranial pressure, organ function, and hospital outcomes among patients with aneurysmal subarachnoid hemorrhage

BACKGROUND

Global cerebral edema (GCE) with subsequent refractory intracranial hypertension complicates some cases of aneurysmal subarachnoid hemorrhage (aSAH), and typically is associated with poorer outcome. Treatment options for refractory intracranial pressure (ICP) cases are limited to decompressive hemicraniectomy (DHC) and targeted temperature management (TTM) with induced hypothermia (32-34 °C). No outcomes comparison between patients treated with either or both forms of refractory ICP therapy exists, and data on the effect of prolonged hypothermia on ICP and organ function among patients with aSAH are limited.

METHODS

This is a retrospective study of aSAH patients who underwent DHC and/or prolonged hypothermia (greater than 48 h) for refractory ICP (i.e., ICP >20 mmHg after osmotherapy) in the intensive care unit of a single, tertiary-care academic center.

RESULTS

Nineteen individuals with aSAH underwent TTM with or without DHC; sixteen patients underwent DHC alone. The patients in TTM group were younger (median age 44 years) than the DHC without TTM population (median age 60 years). TTM was started on median day 2 with a median duration of 7 days. There were no significant group differences in survival to discharge (59 % vs. 69 %) or in the mean modified Rankin score on follow-up (3.6 vs. 3.7), despite the TTM group having longer hospital length of stay (24 vs. 19 days, p = 0.03), longer duration of mechanical ventilation (20 vs. 9 days, p = 0.04), a higher cumulative fluid balance (12.8 vs. 5.1 L, p = 0.01), and higher APACHEII scores. The median maximal ICP decreased from 23.5 to 21 mmHg within 24 h of hypothermia initiation. There were no significant differences in other markers of end-organ function (respiratory, hematologic, renal, liver, and cardiac), infection rate, or adverse events between groups.

CONCLUSIONS

Use of prolonged TTM among aSAH patients with GCE and refractory ICP elevations is associated with a longer duration of mechanical ventilation but is not different in terms of neurological outcomes measured by modified Rankin score or organ function outcomes compared to patients who received DHC alone.

A 51-year-old man with seizures and progressive behavioral changes

A 51-year-old man was admitted for evaluation of new-onset generalized seizures in the context of progressive and significant behavioral change. His medical history was only notable for previous outbreaks of genital herpes. He took no medications. He had occasional social alcohol use and no illicit drug use but was a 35-pack-year current smoker. The patient had no relevant occupational exposure history but had recently traveled to Panama. Initially, the patient's significant other noticed a progressive flattening of his affect. The patient then started to experience episodes of "passing out" that led to injuries prompting ED visits. He was prescribed antiseizure medications and scheduled for an outpatient workup. However, with progressive gait instability, lethargy, and an increase in frequency of generalized seizures, the patient was admitted for treatment of suspected viral encephalitis. Despite initiation of antimicrobial and antiviral therapy, the patient's level of alertness continued to decline, ultimately leading to intubation for airway protection.

A 60-year-old woman with PET scan-avid lung nodules and a history of a ruptured silicone breast implant

A 60-year-old woman was referred to the pulmonary clinic for evaluation of lung nodules. Her medical history was notable for hypothyroidism, anxiety, and a ruptured breast implant for which incomplete surgical resection and evacuation had been performed 10 years previously. She was a lifelong nonsmoker and worked as a gym instructor. The patient denied occupational exposures and had not traveled recently. Medications included levothyroxine and alprazolam. Except for a 1-month history of occasional dry cough, the review of systems was negative. The patient's physician queried whether the previously ruptured silicone breast implant may have played a role in the genesis of the nodules and referred the patient to our institution for further management. The lack of systemic symptoms relative to the degree of lung involvement provided an early diagnostic clue.

Therapeutic hypothermia for neuroprotection: history, mechanisms, risks, and clinical applications

The earliest recorded application of therapeutic hypothermia in medicine spans about 5000 years; however, its use has become widespread since 2002, following the demonstration of both safety and efficacy of regimens requiring only a mild (32°C-35°C) degree of cooling after cardiac arrest. We review the mechanisms by which hypothermia confers neuroprotection as well as its physiological effects by body system and its associated risks. With regard to clinical applications, we present evidence on the role of hypothermia in traumatic brain injury, intracranial pressure elevation, stroke, subarachnoid hemorrhage, spinal cord injury, hepatic encephalopathy, and neonatal peripartum encephalopathy. Based on the current knowledge and areas undergoing or in need of further exploration, we feel that therapeutic hypothermia holds promise in the treatment of patients with various forms of neurologic injury; however, additional quality studies are needed before its true role is fully known.

Obstructive sleep apnea, obesity, and the development of acute respiratory distress syndrome

BACKGROUND

Obstructive sleep apnea (OSA) may increase the risk of respiratory complications and acute respiratory distress syndrome (ARDS) among surgical patients. OSA is more prevalent among obese individuals; obesity can predispose to ARDS.

HYPOTHESIS

It is unclear whether OSA independently contributes towards the risk of ARDS among hospitalized patients.

METHODS

This is a pre-planned retrospective subgroup analysis of the prospectively identified cohort of 5,584 patients across 22 hospitals with at least one risk factor for ARDS at the time of hospitalization from a trial by the US Critical Illness and Injury Trials Group designed to validate the Lung Injury Prediction Score. A total of 252 patients (4.5%) had a diagnosis of OSA at the time of hospitalization; of those, 66% were obese. Following multivariate adjustment in the logistic regression model, there was no significant relationship between OSA and development of ARDS (OR = 0.65, 95%CI = 0.32-1.22). However, body mass index (BMI) was associated with subsequent ARDS development (OR = 1.02, 95%CI = 1.00-1.04, p = 0.03). Neither OSA nor BMI affected mechanical ventilation requirement or mortality.

CONCLUSIONS

Prior diagnosis of OSA did not independently affect development of ARDS among patients with at least one predisposing condition, nor the need for mechanical ventilation or hospital mortality. Obesity appeared to independently increase the risk of ARDS.

Effect of therapeutic hypothermia on gas exchange and respiratory mechanics: a retrospective cohort study

Targeted temperature management (TTM) may improve respiratory mechanics and lung inflammation in acute respiratory distress syndrome (ARDS) based on animal and limited human studies. We aimed to assess the pulmonary effects of TTM in patients with respiratory failure following cardiac arrest. Retrospective review of consecutive cardiac arrest cases occurring out of hospital or within 24 hours of hospital admission (2002-2012). Those receiving TTM (n=44) were compared with those who did not (n=42), but required mechanical ventilation (MV) for at least 4 days following the arrest. There were no between-group differences in age, gender, body mass index, APACHE II, or fluid balance during the study period. The TTM group had lower ejection fraction, Glasgow Coma Score, and more frequent use of paralytics. Matched data analyses (change at day 4 compared with baseline of the individual subject) showed favorable, but not statistically significant trends in respiratory mechanics endpoints (airway pressure, compliance, tidal volume, and PaO2/FiO2) in the TTM group. The PaCO2 decreased significantly more in the TTM group, as compared with controls (-12 vs. -5 mmHg, p=0.02). For clinical outcomes, the TTM group consistently, although not significantly, did better in survival (59% vs. 43%) and hospital length of stay (12 vs. 15 days). The MV duration and Cerebral Performance Category score on discharge were significantly lower in the TTM group (7.3 vs. 10.7 days, p=0.04 and 3.2 vs. 4, p=0.01). This small retrospective cohort suggests that the effect of TTM ranges from equivalent to favorable, compared with controls, for the specific respiratory and clinical outcomes in patients with respiratory failure following cardiac arrest.

Sepsis: a review for the neurohospitalist

Sepsis represents a major challenge in medicine. It begins as a systemic response to infection that can affect virtually any organ system, including the central and peripheral nervous systems. Akin to management of stroke, early recognition and treatment of sepsis are just as crucial to a successful outcome. Sepsis can precipitate myasthenic crisis and lead to encephalopathy and critical illness neuropathy. Stroke and traumatic brain injury can predispose a patient to develop sepsis, whereas Guillain-Barré syndrome is similarly not uncommon following infection. This review article will first describe the essential principles of sepsis recognition, pathophysiology, and management and will then briefly cover the neurologic aspects associated with sepsis. Vigilant awareness of the clinical features of sepsis and timeliness of intervention can help clinicians prevent progression of this disease to a multisystem organ failure, which can be difficult to reverse even after the original source of infection is under control.