Beliefs of physician directors on the management of devastating brain injuries at the Canadian emergency department and intensive care unit interface: a national site-level survey.

PURPOSE: Insufficient evidence-based recommendations to guide care for patients with devastating brain injuries (DBIs) leave patients vulnerable to inconsistent practice at the emergency department (ED) and intensive care unit (ICU) interface. We sought to characterize the beliefs of Canadian emergency medicine (EM) and critical care medicine (CCM) physician site directors regarding current management practices for patients with DBI. METHODS: We conducted a cross-sectional survey of EM and CCM physician directors of adult EDs and ICUs across Canada (December 2022 to March 2023). Our primary outcome was the proportion of respondents who manage (or consult on) patients with DBI in the ED. We conducted subgroup analyses to compare beliefs of EM and CCM physicians. RESULTS: Of 303 eligible respondents, we received 98 (32%) completed surveys (EM physician directors, 46; CCM physician directors, 52). Most physician directors reported participating in the decision to withdraw life-sustaining measures (WLSM) for patients with DBI in the ED (80%, n = 78), but 63% of these (n = 62) said this was infrequent. Physician directors reported that existing neuroprognostication methods are rarely sufficient to support WLSM in the ED (49%, n = 48) and believed that an ICU stay is required to improve confidence (99%, n = 97). Most (96%, n = 94) felt that providing caregiver visitation time prior to WLSM was a valid reason for ICU admission. CONCLUSION: In our survey of Canadian EM and CCM physician directors, 80% participated in WLSM in the ED for patients with DBI. Despite this, most supported ICU admission to optimize neuroprognostication and patient-centred end-of-life care, including organ donation.

RéSUMé: OBJECTIF: L'insuffisance des recommandations fondées sur des données probantes pour guider les soins aux individus atteints de lésions cérébrales dévastatrices rend ces personnes vulnérables à des pratiques incohérentes à la jonction entre le service des urgences et de l'unité de soins intensifs (USI). Nous avons cherché à caractériser les croyances des directeurs médicaux canadiens en médecine d'urgence et médecine de soins intensifs concernant les pratiques de prise en charge actuelles des personnes ayant subi une lésion cérébrale dévastatrice. MéTHODE: Nous avons réalisé un sondage transversal auprès des directeurs médicaux des urgences et des unités de soins intensifs pour adultes du Canada (décembre 2022 à mars 2023). Notre critère d'évaluation principal était la proportion de répondant·es qui prennent en charge (ou jouent un rôle de consultation auprès) des personnes atteintes de lésions cérébrales dévastatrices à l'urgence. Nous avons effectué des analyses en sous-groupes pour comparer les croyances des médecins des urgences et des soins intensifs. RéSULTATS: Sur les 303 personnes répondantes admissibles, 98 (32 %) ont répondu aux sondages (directions médicales des urgences, 46; directions médicales d'USI, 52). La plupart des directeurs médicaux ont déclaré avoir participé à la décision de retirer des traitements de maintien des fonctions vitales (TFMV) pour des patient·es atteint·es de lésions cérébrales dévastatrices à l'urgence (80 %, n = 78), mais 63 % (n = 62) ont déclaré que c'était peu fréquent. Les directions médicales ont indiqué que les méthodes de neuropronostic existantes sont rarement suffisantes pour appuyer le retrait des TMFV à l'urgence (49 %, n = 48) et croyaient qu'un séjour aux soins intensifs était nécessaire pour améliorer leur confiance en ces méthodes (99 %, n = 97). La plupart (96 %, n = 94) estimaient que le fait d'offrir du temps de visite aux personnes soignantes avant le retrait des TMFV était un motif valable d'admission aux soins intensifs. CONCLUSION: Dans le cadre de notre sondage mené auprès des directions médicales des services d'urgence et des USI au Canada, 80 % d'entre elles ont participé au retrait de TMFV à l'urgence pour des patient·es souffrant de lésions cérébrales dévastatrices. Malgré cela, la plupart d'entre elles étaient en faveur d'une admission aux soins intensifs afin d'optimiser le neuropronostic et les soins de fin de vie axés sur les patient·es, y compris le don d'organes.

The reticular activating system: a narrative review of discovery, evolving understanding, and relevance to current formulations of brain death.

A series of landmark experiments conducted throughout the 20th century progressively localized the regions involved in consciousness to the reticular activating system (RAS) and its ascending projections. The first description of the RAS emerged in 1949 through seminal experiments performed by Moruzzi and Magoun in feline brainstems; additional experiments in the 1950s revealed connections between the RAS and the thalamus and neocortical structures. This knowledge has allowed for the explanation of disorders of consciousness with exquisite anatomic precision. The clinical relevance of the RAS is further apparent in modern definitions of brain death/death by neurologic criteria (BD/DNC), which require demonstration of the complete and permanent loss of capacity for consciousness as one of their core criteria. BD/DNC is currently understood across jurisdictions in terms of "whole brain" and "brainstem" formulations. Although their clinical examination between formulations is indistinguishable, policies for BD/DNC declaration may differ in the rare scenario of patients with isolated infratentorial brain injuries, in which ancillary testing is advised in the whole brain formulation but not the brainstem formulation. Canadian guidelines acknowledge that the distinction between whole brain and brainstem formulations is unclear with respect to clinical implications for patients with isolated infratentorial injuries. This has led to variability in Canadian clinicians' use of ancillary testing when the mechanism of BD/DNC is suspected to be an isolated infratentorial injury. The present narrative review highlights these concepts and explores implications for determination of BD/DNC in Canada, with specific emphasis on the RAS and its relevance to both formulations.

RéSUMé: Une série d'expériences marquantes menées tout au long du 20e siècle a progressivement permis de localiser les régions impliquées dans la conscience dans le système d'activation réticulaire (SAR) et ses projections ascendantes. La première description du SAR a vu le jour en 1949 grâce à des expériences fondatrices réalisées par Moruzzi et Magoun dans des troncs cérébraux félins; d'autres expériences menées au cours des années 1950 ont révélé des liens entre le SAR et le thalamus et les structures néocorticales. Ces connaissances ont permis d'expliquer les troubles de la conscience avec une précision anatomique extraordinaire. La pertinence clinique du SAR est encore plus évidente dans les définitions modernes de la mort cérébrale / du décès déterminé par des critères neurologiques (MC/DCN), qui exigent la démonstration de la perte complète et permanente de la capacité de conscience comme l'un de ses critères de base. La mort cérébrale est actuellement comprise partout en termes de formulations de « cerveau entier ¼ et de « tronc cérébral ¼. Bien que l'examen clinique ne fasse pas de distinction entre ces formulations, les politiques de déclaration de MC/DCN peuvent différer dans le rare cas de patients présentant des lésions cérébrales infratentorielles isolées, pour lesquels des examens auxiliaires sont conseillés lorsqu'on parle de cerveau entier mais pas lorsqu'on utilise la formulation de tronc cérébral. Les lignes directrices canadiennes reconnaissent que la distinction entre les termes de cerveau entier et de tronc cérébral n'est pas claire en ce qui concerne leurs implications cliniques pour les patients présentant des lésions infratentorielles isolées. Cela a entraîné une variabilité dans l'utilisation des examens auxiliaires par les cliniciens canadiens lorsqu'ils soupçonnent que le mécanisme de MC/DCN consiste en une lésion infratentorielle isolée. Ce compte rendu narratif met en lumière ces concepts et explore les implications pour la détermination de la MC/DCN au Canada, en mettant une emphase spécifique sur le SAR et sa pertinence pour les deux formulations.

Infratentorial brain injury and death by neurologic criteria in Canada: a narrative review.

There are two anatomic formulations of death by neurologic criteria accepted worldwide: whole-brain death and brainstem death. As part of the Canadian Death Definition and Determination Project, we convened an expert working group and performed a narrative review of the literature. Infratentorial brain injury (IBI) with an unconfounded clinical assessment consistent with death by neurologic criteria represents a nonrecoverable injury. The clinical determination of death cannot distinguish between IBI and whole-brain cessation of function. Current clinical, functional, and neuroimaging assessments cannot reliably confirm the complete and permanent destruction of the brainstem. No patient with isolated brainstem death has been reported to recover consciousness and all patients have died. Studies suggest a significant majority of isolated brainstem death will evolve into whole-brain death, influenced by time/duration of somatic support and impacted by ventricular drainage and/or posterior fossa decompressive craniectomy. Acknowledging variability in intensive care unit (ICU) physician opinion on this matter, a majority of Canadian ICU physicians would perform ancillary testing for death determination by neurologic criteria in the context of IBI. There is currently no reliable ancillary test to confirm complete destruction of the brainstem; ancillary testing currently includes evaluation of both infratentorial and supratentorial flow. Acknowledging international variability in this regard, the existing evidence reviewed does not provide sufficient confidence that the clinical exam in IBI represents a complete and permanent destruction of the reticular activating system and thus the capacity for consciousness. On this basis, IBI consistent with clinical signs of death by neurologic criteria without significant supratentorial involvement does not fulfill criteria for death in Canada and ancillary testing is required.

RéSUMé: Il existe deux formulations anatomiques du décès selon des critères neurologiques acceptés dans le monde entier : la mort du cerveau entier et la mort du tronc cérébral. Dans le cadre du Projet canadien de définition et de détermination du décès, nous avons réuni un groupe de travail composé d'experts et réalisé un compte rendu narratif de la littérature. Une lésion cérébrale infratentorielle (LCI) avec une évaluation clinique sans facteur confondant et compatible avec un décès selon des critères neurologiques représente une atteinte irrécupérable. La détermination clinique du décès ne permet pas de faire la distinction entre une LCI et l'arrêt de la fonction dans le cerveau entier. Les évaluations cliniques, fonctionnelles et de neuroimagerie actuelles ne peuvent pas confirmer de manière fiable la destruction complète et permanente du tronc cérébral. La récupération de la conscience n'a jamais été signalée chez aucun patient présentant une mort isolée du tronc cérébral, et tous les patients sont décédés. Des études suggèrent qu'une majorité significative des morts isolées du tronc cérébral évolueront vers la mort cérébrale entière, étant influencées par le temps et la durée de l'assistance somatique et impactées par le drainage ventriculaire et/ou la craniectomie décompressive de la fosse postérieure. Compte tenu de la variabilité des opinions des médecins intensivistes à ce sujet, la majorité des médecins intensivistes canadiens réaliseraient des examens auxiliaires pour déterminer le décès selon des critères neurologiques dans le contexte d'une LCI. Il n'existe actuellement aucun examen auxiliaire fiable pour confirmer la destruction complète du tronc cérébral; les examens auxiliaires comprennent actuellement l'évaluation de la circulation infratentorielle et supratentorielle. Reconnaissant la variabilité internationale à cet égard, les données probantes existantes passées en revue ne sont pas suffisamment fiables pour affirmer que l'examen clinique en cas de LCI représente une destruction complète et permanente du système d'activation réticulaire et donc de la capacité de conscience. En se fondant sur cette base, une LCI compatible avec les signes cliniques d'un décès selon des critères neurologiques sans atteinte supratentorielle significative ne répond pas aux critères de décès au Canada et un examen auxiliaire est requis.

Requests for somatic support after neurologic death determination: Canadian physician experiences.

PURPOSE: Neurologic determination of death (NDD) is legally accepted as death in Canada but remains susceptible to misunderstandings. In some cases, families request continued organ support after NDD. Conflicts can escalate to formal legal challenges, causing emotional, financial, and moral distress for all involved. We describe prevalence, characteristics, and common experiences with requests for continued organ support following NDD in Canada. METHODS: Mixed-methods design combining anonymous online survey with semi-structured interviews of Canadian critical care physicians (448 practitioners, adult and pediatric). RESULTS: One hundred and six physicians responded to the survey and 12 participated in an interview. Fifty-two percent (55/106) of respondents had encountered a request for continued organ support after NDD within two years, 47% (26/55) of which involved threat of legal action. Requests for continued support following NDD ranged from appeals for time for family to gather before ventilator removal to disagreement with the concept of NDD. Common responses to requests included: consultation with an additional physician (54%), consultation with spiritual services (41%), and delay of one to three days for NDD acceptance (49%). Respondents with prior experience were less likely to recommend ancillary tests (P = 0.004) or consultation with bioethics services (P = 0.004). Qualitative analysis revealed perceptions that requests for continued organ support were driven by mistrust, tensions surrounding decision-making, and cultural differences rather than a lack of specific information about NDD. CONCLUSIONS: Family requests for continued somatic support following NDD were encountered by half our sample of Canadian critical care physicians. Mitigation strategies require attention to the multifaceted social contexts surrounding these complex scenarios.

RéSUMé: OBJECTIF: Au Canada, le diagnostic de décès neurologique (DDN) est légalement accepté en tant que décès, mais il est encore mal compris parfois. Dans certains cas, les familles demandent de maintenir artificiellement les fonctions vitales après un DDN. Les conflits peuvent dégénérer et devenir des contestations judiciaires formelles, provoquant de la détresse émotionnelle, financière et morale pour tous. Nous décrivons la prévalence, les caractéristiques et les expériences fréquemment vécues en lien avec des demandes de maintien artificiel des fonctions vitales après un DDN au Canada. MéTHODE: Méthodologie mixte combinant un sondage électronique anonyme à des entretiens semi-structurés de médecins intensivistes canadiens (448 praticiens, populations adulte et pédiatrique). RéSULTATS: Cent six médecins ont répondu au sondage et 12 ont participé à un entretien. Cinquante-deux pour cent (55/106) des répondants avaient déjà reçu une demande de maintien des fonctions vitales après un DDN au cours des deux dernières années, dont 47 % (26/55) étaient accompagnées de menaces de poursuite judiciaire. Les demandes de maintien continu à la suite d'un DDN allaient des requêtes de temps supplémentaire pour que la famille puisse se réunir avant de débrancher le respirateur aux désaccords quant au concept même de DDN. Les réponses fréquentes aux demandes étaient : la consultation d'un autre médecin (54 %), la consultation des services spirituels (41 %), et un délai d'un à trois jours pour accepter le DDN (49 %). Les répondants ayant déjà eu une expérience similaire avaient moins tendance à recommander des tests supplémentaires (P = 0,004) ou une consultation auprès des services de bioéthique (P = 0,004). L'analyse qualitative a révélé des perceptions selon lesquelles les demandes de maintien des soins étaient motivées par la méfiance, des tensions autour de la prise de décision et des différences d'ordre culturel plutôt que par le manque d'informations spécifiques concernant le DDN. CONCLUSION: La moitié de notre échantillon de médecins intensivistes canadiens ont déjà été confrontés à des demandes de la famille pour maintenir le soutien des fonctions vitales à la suite d'un DDN. Les stratégies de mitigation doivent tenir compte des contextes sociaux aux multiples facettes entourant ces situations complexes.

Prevention of oral and maxillofacial trauma secondary to orofacial dyskinesias associated with anti-N-methyl-D-aspartate receptor encephalitis: a case series.

BACKGROUND: Anti-N-methyl-D-aspartate receptor encephalitis (anti-NMDARE) is a multi-stage autoimmune-mediated disease associated with a multitude of neuropsychiatric and dysautonomic features. Orofacial dyskinesias are frequently associated with this condition and manifest as abnormal movements of the orofacial musculature. These involuntary movements may result in significant trauma to the oral and maxillofacial complex including the avulsion of the dentition and orofacial lacerations. CASE PRESENTATION: We describe the course of two female patients with anti-NMDARE in whom significant involuntary self-inflicted maxillofacial trauma was suffered despite the use of complex parenteral sedation regimens. The application of traditional maxillomandibular wiring techniques and pharmacologic strategies, including botulinum toxin, to immobilize the mandible were initially unsuccessful. These difficulties led to the fabrication and wire-based fixation of a patient-specific acrylic oral appliance that maintained the mandible in a depressed position and mitigated all lateral and protrusive movements. DISCUSSION AND CONCLUSIONS: These cases illustrate the first known successful use of an appliance-based therapy for managing orofacial dyskinesias in the anti-NMDARE patient population through an adaptation of traditional maxillomandibular fixation techniques. This approach eliminated further orofacial trauma and afforded physicians with safer means to manage and assess patients afflicted with this condition during their protracted intensive care unit admissions.

Organ donation in patients on extracorporeal membrane oxygenation: considerations for determination of death and withdrawal of life support.

The use of extracorporeal membrane oxygenation (ECMO) is increasing globally, although mortality in this setting remains high. Patients on ECMO may be potential organ donors in the context of withdrawal of life-sustaining measures (WLSM) or neurologic determination of death (NDD). Nevertheless, there are currently no Canadian standards to guide clinicians on NDD or WLSM for the purposes of organ donation in this patient population. Apnea testing remains fundamental to determining NDD and is an area where ECMO may alter routine procedures. In this review, we outline protocols for the performance of apnea testing and WLSM for patients supported with ECMO, highlighting important technical and physiologic considerations that may affect the determination of death. In addition, we review important considerations for NDD in ECMO, including management of potential confounders, strategies for controlling oxygen and carbon dioxide levels during apnea testing, and the appropriate use of ancillary tests to support NDD. In the context of ECMO support, there is limited evidence to guide NDD and WLSM for the purposes of organ donation. Drawing upon extensive clinical experience, we provide protocols for these processes and review other important considerations in an effort to maximize donor potential in this growing patient population.

RéSUMé: L'utilisation de l'oxygénation extracorporelle (ECMO) augmente dans le monde, malgré le fait que la mortalité associée demeure élevée. Les patients sous ECMO pourraient être des donneurs d'organes potentiels dans le cadre d'une interruption des mesures de maintien des fonctions vitales ou d'un diagnostic de décès neurologique (DDN). À l'heure actuelle il n'existe cependant aucune norme canadienne pour guider les cliniciens en matière de DDN ou d'interruption des mesures de maintien des fonctions vitales aux fins de dons d'organes dans cette population de patients. Le test d'apnée demeure fondamental pour poser un DDN mais il s'agit d'un domaine dans lequel l'ECMO pourrait modifier les interventions de routine. Dans ce compte rendu, nous décrivons des protocoles pour la réalisation d'un test d'apnée et l'interruption des mesures de maintien des fonctions vitales chez des patients sous ECMO. Nous soulignons certaines considérations techniques et physiologiques importantes qui pourraient avoir un impact sur le diagnostic de décès. En outre, nous passons en revue certaines considérations importantes pour le DDN sous ECMO, notamment la prise en charge de facteurs confondants potentiels, les stratégies pour contrôler les niveaux d'oxygène et de dioxyde de carbone pendant le test d'apnée, et l'utilisation adaptée de tests complémentaires pour appuyer le DDN. Dans le cadre d'un maintien des fonctions vitales sous ECMO, il n'existe que peu de données probantes pour guider le DDN et l'interruption des mesures de maintien des fonctions vitales aux fins d'un don d'organes. En nous fondant sur notre vaste expérience clinique, nous proposons des protocoles pour ces processus et passons en revue d'autres considérations importantes afin de maximiser le potentiel de dons dans cette population de patients grandissante.

The Use of Standardized Management Protocols for Critically Ill Patients with Non-traumatic Subarachnoid Hemorrhage: A Systematic Review.

The use of standardized management protocols (SMPs) may improve patient outcomes for some critical care diseases. Whether SMPs improve outcomes after subarachnoid hemorrhage (SAH) is currently unknown. We aimed to study the effect of SMPs on 6-month mortality and neurologic outcomes following SAH. A systematic review of randomized control trials (RCTs) and observational studies was performed by searching multiple indexing databases from their inception through January 2019. Studies were limited to adult patients (age ≥ 18) with non-traumatic SAH reporting mortality, neurologic outcomes, delayed cerebral ischemia (DCI) and other important complications. Data on patient and SMP characteristics, outcomes and methodologic quality were extracted into a pre-piloted collection form. Methodologic quality of observational studies was assessed using the Newcastle-Ottawa scale, and RCT quality was reported as per the Cochrane risk of bias tool. A total of 11,260 studies were identified, of which 37 (34 full-length articles and 3 abstracts) met the criteria for inclusion. Two studies were RCTs and 35 were observational. SMPs were divided into four broad domains: management of acute SAH, early brain injury, DCI and general neurocritical care. The most common SMP design was control of DCI, with 22 studies assessing this domain of care. Overall, studies were of low quality; most described single-center case series with small patient sizes. Definitions of key terms and outcome reporting practices varied significantly between studies. DCI and neurologic outcomes in particular were defined inconsistently, leading to significant challenges in their interpretation. Given the substantial heterogeneity in reporting practices between studies, a meta-analysis for 6-month mortality and neurologic outcomes could not be performed, and the effect of SMPs on these measures thus remains inconclusive. Our systematic review highlights the need for large, rigorous RCTs to determine whether providing standardized, best-practice management through the use of a protocol impacts outcomes in critically ill patients with SAH.Trial registration Registration number: CRD42017069173.

Long-Term Effects of Phased Implementation of Antimicrobial Stewardship in Academic ICUs: 2007-2015.

OBJECTIVES: Antimicrobial stewardship is advocated to reduce antimicrobial resistance in ICUs by reducing unnecessary antimicrobial consumption. Evidence has been limited to short, single-center studies. We evaluated whether antimicrobial stewardship in ICUs could reduce antimicrobial consumption and costs. DESIGN: We conducted a phased, multisite cohort study of a quality improvement initiative. SETTING: Antimicrobial stewardship was implemented in four academic ICUs in Toronto, Canada beginning in February 2009 and ending in July 2012. PATIENTS: All patients admitted to each ICU from January 1, 2007, to December 31, 2015, were included. INTERVENTIONS: Antimicrobial stewardship was delivered using in-person coaching by pharmacists and physicians three to five times weekly, and supplemented with unit-based performance reports. Total monthly antimicrobial consumption (measured by defined daily doses/100 patient-days) and costs (Canadian dollars/100 patient-days) before and after antimicrobial stewardship implementation were measured. MEASUREMENTS AND MAIN RESULTS: A total of 239,123 patient-days (57,195 patients) were analyzed, with 148,832 patient-days following introduction of antimicrobial stewardship. Antibacterial use decreased from 120.90 to 110.50 defined daily dose/100 patient-days following introduction of antimicrobial stewardship (adjusted intervention effect -12.12 defined daily dose/100 patient-days; 95% CI, -16.75 to -7.49; p < 0.001) and total antifungal use decreased from 30.53 to 27.37 defined daily doses/100 patient-days (adjusted intervention effect -3.16 defined daily dose/100 patient-days; 95% CI, -8.33 to 0.04; p = 0.05). Monthly antimicrobial costs decreased from $3195.56 to $1998.59 (adjusted intervention effect -$642.35; 95% CI, -$905.85 to -$378.84; p < 0.001) and total antifungal costs were unchanged from $1771.86 to $2027.54 (adjusted intervention effect -$355.27; 95% CI, -$837.88 to $127.33; p = 0.15). Mortality remained unchanged, with no consistent effects on antimicrobial resistance and candidemia. CONCLUSIONS: Antimicrobial stewardship in ICUs with coaching plus audit and feedback is associated with sustained improvements in antimicrobial consumption and cost. ICUs with high antimicrobial consumption or expenditure should consider implementing antimicrobial stewardship programs.

Use of Antiepileptic Drugs in Aneurysmal Subarachnoid Hemorrhage.

INTRODUCTION: Controversy exists in antiepileptic drug (AED) prophylaxis prescribing in patients with aneurysmal subarachnoid hemorrhage (SAH). We undertook the Use of Antiepileptic Drugs in Aneurysmal Subarachnoid Hemorrhage (ALIBI) study to identify factors associated with prescribing practices. METHODS: A retrospective chart review of all consecutive patients requiring Level 1 care with aneurysmal SAH admitted between 2012 and 2014 to the intensive care unit at Toronto Western Hospital, Ontario, Canada, was conducted. Data were collected on clinical and imaging characteristics. Primary and secondary outcomes were AED prophylaxis and clinical seizure activity during hospitalization. Data were compared using chi-square or Mann-Whitney U-tests. Those variables found to be significant, or trending toward significance, on univariate analysis were fitted to multivariate regression. RESULTS: Sixty-eight patients were included. Mean age was 62 ± 12.2, and 42.6% of patients were male. Of these, 21 patients (30.9%) received AED prophylactically, while 18 (26.5%) had reported seizures at some point during hospitalization. Female gender and presence of midline shift (MLS) were significantly associated or approached significance with AED prophylaxis in univariate analysis (p = 0.036 and p = 0.062, respectively). In multivariate analysis, only MLS was an independent predictor (odds ratio 5.09, p = 0.04). CONCLUSION: The presence of MLS was an independent predictor of seizure activity in patients with aneurysmal SAH. AED prophylaxis prescribing patterns seemed arbitrary and was not informed by identifiable clinical factors or true risk factors for seizure. A current lack of evidence guiding AED prescribing practice highlights the need for larger studies in this patient population.

Utiliser des médicaments antiépileptiques dans des cas d'hémorragie sous-arachnoïdienne anévrismale. Introduction: Dans les cas de patients victimes d'hémorragie sous-arachnoïdienne anévrismale, il faut savoir qu'un traitement prophylactique au moyen de médicaments antiépileptiques demeure controversé. Dans cette étude, nous avons donc entrepris d'identifier les facteurs associés aux pratiques de prescription de ces médicaments lorsque survient ce type d'hémorragie. Méthodes: Pour ce faire, nous avons passé en revue les dossiers de tous les patients vus consécutivement et ayant nécessité, après avoir été admis entre 2012 et 2014 à l'unité des soins intensifs du Toronto Western Hospital (Ontario, Canada), des soins de niveau 1 à la suite d'une hémorragie sous-arachnoïdienne anévrismale. Nous avons collecté nos données en nous basant sur des aspects cliniques et sur d'autres aspects liés à des examens d'IRM. Notre principal résultat mesuré a été l'efficacité d'un traitement prophylactique au moyen de médicaments antiépileptiques; dans un deuxième temps, nous avons aussi cherché à mesurer l'activité convulsive clinique en cours d'hospitalisation. Nous avons ensuite comparé nos données en utilisant les tests du X2 ou de U Mann-Whitney. Les variables apparues significatives ou tendant à être significatives dans le cadre d'une analyse univariée ont été ajustées pour une régression multivariée. Résultats: 68 patients ont été inclus dans cette étude. Leur âge moyen était de 62 ± 12,2; 42,6% d'entre eux étaient des hommes. De ce nombre, 21 patients (30,9%) ont alors suivi un traitement prophylactique au moyen de médicaments antiépileptiques tandis que 18 (26,5%) ont fait état de crises convulsives à un moment ou un autre de leur séjour à l'hôpital. Dans le cadre d'une analyse univariée, le fait d'être une femme et la présence d'une déviation de la ligne médiane (midline shift) ont été par ailleurs nettement associés ou en grande partie associés à un traitement prophylactique au moyen de médicaments antiépileptiques (respectivement p = 0,036 et p = 0,062). Dans le cadre d'une analyse multivariée, seule la déviation de la ligne médiane s'est avérée un facteur prédicteur indépendant (rapport des cotes de 5,09; P = 0,04). Conclusion: La présence de déviation de la ligne médiane constitue un facteur prédictif indépendant d'activité convulsive chez des patients victimes d'hémorragie sous-arachnoïdienne anévrismale. De plus, les tendances en matière de prescription de médicaments antiépileptiques apparaissent arbitraires et ne reposent pas sur des facteurs cliniques identifiables ou sur de véritables facteurs de risque liés aux convulsions. Le manque actuel de preuves pouvant orienter les pratiques de prescription de ces médicaments met en lumière la nécessité d'effectuer de plus amples études au sein de cette population de patients.

Use of a structured panel process to define antimicrobial prescribing appropriateness in critical care.

BACKGROUND: Antimicrobial prescribing is frequently reported as appropriate or inappropriate, particularly in the ICU. However, the definitions used are non-standardized and lack validity and reliability. OBJECTIVES: To develop standardized definitions of appropriateness for antimicrobial prescribing in the critical care setting. METHODS: We used consensus-based modified Delphi and RAND appropriateness methodology to develop criteria to define appropriateness of antimicrobial prescribing. A multiphased approach with an online questionnaire followed by a facilitated in-person meeting was utilized and included clinicians from a variety of practice areas (e.g. surgeons, infectious diseases specialists, intensivists, transplant specialists and pharmacists). RESULTS: There were a total of 23 criteria agreed upon to define the following categories of antimicrobial prescribing: appropriate; effective but unnecessary; inappropriate; and under-treatment. CONCLUSIONS: These standardized criteria for appropriateness may be generalizable to other patient populations and utilized with other tools to adjudicate prescribing practices.

Worldwide Survey of the "Assessing Pain, Both Spontaneous Awakening and Breathing Trials, Choice of Drugs, Delirium Monitoring/Management, Early Exercise/Mobility, and Family Empowerment" (ABCDEF) Bundle.

OBJECTIVES: To assess the knowledge and use of the Assessment, prevention, and management of pain; spontaneous awakening and breathing trials; Choice of analgesia and sedation; Delirium assessment; Early mobility and exercise; and Family engagement and empowerment (ABCDEF) bundle to implement the Pain, Agitation, Delirium guidelines. DESIGN: Worldwide online survey. SETTING: Intensive care. INTERVENTION: A cross-sectional online survey using the Delphi method was administered to intensivists worldwide, to assess the knowledge and use of all aspects of the ABCDEF bundle. MEASUREMENT AND MAIN RESULTS: There were 1,521 respondents from 47 countries, 57% had implemented the ABCDEF bundle, with varying degrees of compliance across continents. Most of the respondents (83%) used a scale to evaluate pain. Spontaneous awakening trials and spontaneous breathing trials are performed in 66% and 67% of the responder ICUs, respectively. Sedation scale was used in 89% of ICUs. Delirium monitoring was implemented in 70% of ICUs, but only 42% used a validated delirium tool. Likewise, early mobilization was "prescribed" by most, but 69% had no mobility team and 79% used no formal mobility scale. Only 36% of the respondents assessed ICU-acquired weakness. Family members were actively involved in 67% of ICUs; however, only 33% used dedicated staff to support families and only 35% reported that their unit was open 24 hr/d for family visits. CONCLUSIONS: The current implementation of the ABCDEF bundle varies across individual components and regions. We identified specific targets for quality improvement and adoption of the ABCDEF bundle. Our data reflect a significant but incomplete shift toward patient- and family-centered ICU care in accordance with the Pain, Agitation, Delirium guidelines.

Facteurs qui influent sur le consentement au don d'organes : étude rétrospective basée dans la population.

CONTEXTE: Améliorer l'approche des donneurs d'organes potentiels et obtenir leur consentement pourrait favoriser l'autonomie des patients et donner accès à un plus grand nombre d'organes à transplanter. Nous avons voulu identifier les facteurs modifiables qui influent sur le consentement au don d'organes. MÉTHODES: Nous avons procédé à une étude de cohorte rétrospective regroupant les adultes (≥ 18 ans) consécutivement orientés vers le système de don d'organes en Ontario entre avril 2013 et juin 2019. Nous avons analysé les données cliniques et démographiques des patients, les données relatives à leurs mandataires et les particularités des approches pour le consentement au don. Les paramètres de l'étude étaient le consentement au don d'organes et le taux d'approches. Nous avons analysé les liens indépendants entre le consentement et les facteurs propres aux approches et au système. RÉSULTATS: Nous avons identifié 34 837 signalements de donneurs d'organes potentiels, dont 6548 (18,8 %) ont fait l'objet d'approches auprès de leurs mandataires en vue d'un consentement. Parmi ces derniers, 3927 (60,0 % des approches) ont mené à un consentement au don d'organes et 1883 patients (48,0 % des consentements) ont effectivement été donneurs. La raison la plus courante pour laquelle des mandataires n'ont pas été approchés en vue du consentement à un don potentiel était un retard de signalement de la part de l'équipe soignante (45,2 %). Les facteurs modifiables indépendants associés au consentement incluaient : approche téléphonique (rapport des cotes [RC] ajusté 0,46, intervalle de confiance IC à 95 % 0,35­0,58) et approche en collaboration avec le médecin et la coordination des dons (RC ajusté 1,26, IC à 95 % 1,01­1,59). INTERPRÉTATION: Le consentement au don d'organes a été associé à plusieurs facteurs modifiables. Les organisations devraient cibler des interventions visant à assurer un signalement rapide aux organisations de don d'organes, favoriser les approches en personne et promouvoir la participation des médecins au processus d'approche.

Frequency, Composition, and Predictors of In-Transit Critical Events During Pediatric Critical Care Transport.

OBJECTIVES: Transport of pediatric patients is common due to healthcare regionalization. We set out to determine the frequency of in-transit critical events during pediatric critical care transport and identify factors associated with these events. DESIGN: Retrospective cohort study using administrative and clinical data. SETTING: Single pediatric critical care transport provider in Ontario, Canada. PATIENTS: All pediatric care transports between January 1, 2005, and December 31, 2010. MEASUREMENTS AND MAIN RESULTS: The primary outcome was in-transit critical events, defined by an adaptation of a recent consensus definition. In-transit critical events occurred in 1,094 (12.3%) of 8,889 transports. Hypotension (3.6%), tachycardia (3.7%), and bradycardia (3.3%) were the most common critical events. Crews performed medical interventions in 194 transports (2.2%). The frequency and makeup of critical events varied across patient age groups. Age, pretransport mechanical ventilation, pretransport cardiovascular instability, transport duration, scene calls, and paramedic crew level were independently associated with increased risk of in-transit critical events in multivariate analysis. A Transport Pediatric Early Warning Score of 7 or greater predicted in-transit critical events with high specificity but low sensitivity (92.0% and 20.0%, respectively), but was not superior of the combination of pretransport mechanical ventilation and pretransport cardiovascular instability (sensitivity and specificity of 12.6% and 97.4%, respectively). Removal of early warning signs from the definition resulted in critical event rates comparable to those published in adults and improved predictive performance. CONCLUSIONS: Using new consensus definitions of transport-related critical events, we found critical events occurred in almost one in eight transports, and were strongly associated with pretransport cardiovascular instability. Transport Pediatric Early Warning Score was poorly predictive of in-transit critical events, and was not superior to the presence of pretransport mechanical ventilation and cardiovascular instability. Future prospective studies are required to elucidate the optimal matching of transport resources to patients, in particular those with both pretransport cardiovascular instability and mechanical ventilation.

Evolution of Diaphragm Thickness during Mechanical Ventilation. Impact of Inspiratory Effort.

RATIONALE: Diaphragm atrophy and dysfunction have been reported in humans during mechanical ventilation, but the prevalence, causes, and functional impact of changes in diaphragm thickness during routine mechanical ventilation for critically ill patients are unknown. OBJECTIVES: To describe the evolution of diaphragm thickness over time during mechanical ventilation, its impact on diaphragm function, and the influence of inspiratory effort on this phenomenon. METHODS: In three academic intensive care units, 107 patients were enrolled shortly after initiating ventilation along with 10 nonventilated intensive care unit patients (control subjects). Diaphragm thickness and contractile activity (quantified by the inspiratory thickening fraction) were measured daily by ultrasound. MEASUREMENTS AND MAIN RESULTS: Over the first week of ventilation, diaphragm thickness decreased by more than 10% in 47 (44%), was unchanged in 47 (44%), and increased by more than 10% in 13 (12%). Thickness did not vary over time following extubation or in nonventilated patients. Low diaphragm contractile activity was associated with rapid decreases in diaphragm thickness, whereas high contractile activity was associated with increases in diaphragm thickness (P = 0.002). Contractile activity decreased with increasing ventilator driving pressure (P = 0.01) and controlled ventilator modes (P = 0.02). Maximal thickening fraction (a measure of diaphragm function) was lower in patients with decreased or increased diaphragm thickness (n = 10) compared with patients with unchanged thickness (n = 10; P = 0.05 for comparison). CONCLUSIONS: Changes in diaphragm thickness are common during mechanical ventilation and may be associated with diaphragmatic weakness. Titrating ventilatory support to maintain normal levels of inspiratory effort may prevent changes in diaphragm configuration associated with mechanical ventilation.

The Insertion and Management of External Ventricular Drains: An Evidence-Based Consensus Statement : A Statement for Healthcare Professionals from the Neurocritical Care Society.

External ventricular drains (EVDs) are commonly placed to monitor intracranial pressure and manage acute hydrocephalus in patients with a variety of intracranial pathologies. The indications for EVD insertion and their efficacy in the management of these various conditions have been previously addressed in guidelines published by the Brain Trauma Foundation, American Heart Association and combined committees of the American Association of Neurological Surgeons and the Congress of Neurological Surgeons. While it is well recognized that placement of an EVD may be a lifesaving intervention, the benefits can be offset by procedural and catheter-related complications, such as hemorrhage along the catheter tract, catheter malposition, and CSF infection. Despite their widespread use, there are a lack of high-quality data regarding the best methods for placement and management of EVDs to minimize these risks. Existing recommendations are frequently based on observational data from a single center and may be biased to the authors' view. To address the need for a comprehensive set of evidence-based guidelines for EVD management, the Neurocritical Care Society organized a committee of experts in the fields of neurosurgery, neurology, neuroinfectious disease, critical care, pharmacotherapy, and nursing. The Committee generated clinical questions relevant to EVD placement and management. They developed recommendations based on a thorough literature review using the Grading of Recommendations Assessment, Development, and Evaluation system, with emphasis placed not only on the quality of the evidence, but also on the balance of benefits versus risks, patient values and preferences, and resource considerations.

Post-medication Hypotension after Administration of Sedatives and Opioids during Critical Care Transport.

OBJECTIVE: Identification of modifiable risk factors for hypotension during critical care transport is important to optimize patient preparation, crew training, and patient safety. We set out to determine the incidence of hemodynamic deterioration after administration of opioids or sedatives during critical care transport, and identify patient- and transport-level predictors. METHODS: We assembled a retrospective cohort of adults undergoing urgent critical care transport between January 1, 2005, and December 31, 2010. The primary outcome was post-medication hypotension, defined by new hypotension or new vasopressor within 10 minutes of medication administration. RESULTS: Opioids or sedatives were administered 28,592 times in 8,328 patient transports, with 159 episodes of post-medication hypotension (0.6% of all medication administrations). Mechanical ventilation (adjusted odds ratio [OR] 4.9; 95% confidence interval [95%CI] 2.7-8.9), baseline vasopressor requirement (adjusted OR 2.1; 95%CI 1.3-3.4), transport duration (adjusted OR 1.5; 95%CI 1.1-2.2) per log unit increment of duration), surgical diagnosis (adjusted OR 4.1; 95%CI 1.6-10.7 compared to trauma), and ACP crew level (adjusted OR 2.4 compared to baseline of CCP; 95%CI 1.5-3.8) were all associated with an increased odds of post-medication hypotension. ACP crew level remained associated with increased post-medication hypotension in a sensitivity analysis of 1,242 propensity-matched pairs (crude OR for ACP vs. CCP 3.0; 95%CI 1.4-6.5). CONCLUSIONS: Post-medication hypotension occurred once in every 160 drug administrations and was associated with mechanical ventilation, baseline hemodynamic instability, transport duration, surgical diagnosis, and ACP crew. These findings provide targets for improvements in patient preparation, crew training, and clinical practices.