Outcomes in elderly intensive care unit patients, pulmonary hypertension in sickle cell disease, and total liquid ventilation for therapeutic hypothermia after cardiac arrest in rabbits.
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SUBMITTER: Brummel NE
PROVIDER: S-EPMC3297099 | biostudies-literature |
REPOSITORIES: biostudies-literature
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Project description:BACKGROUND: In animal models of cardiac arrest, the benefit afforded by hypothermia is closely linked to the rapidity of the decrease in body temperature after resuscitation. Because total liquid ventilation (TLV) with temperature-controlled perfluorocarbons induces a very rapid and generalized cooling, we aimed to determine whether this could limit the post-cardiac arrest syndrome in a rabbit model. We especially focused on neurological, cardiac, pulmonary, liver and kidney dysfunctions. METHODS AND RESULTS: Anesthetized rabbits were submitted to either 5 or 10 minutes of untreated ventricular fibrillation. After cardiopulmonary resuscitation and resumption of a spontaneous circulation, the animals underwent either normothermic life support (control) or therapeutic hypothermia induced by TLV. The latter procedure decreased esophageal and tympanic temperatures to 32°C to 33°C within only 10 minutes. After rewarming, the animals submitted to TLV exhibited an attenuated neurological dysfunction and decreased mortality 7 days later compared with control. The neuroprotective effect of TLV was confirmed by a significant reduction in brain histological damages. We also observed limitation of myocardial necrosis, along with a decrease in troponin I release and a reduced myocardial caspase 3 activity, with TLV. The beneficial effects of TLV were directly related to the rapidity of hypothermia induction because neither conventional cooling (cold saline infusion plus external cooling) nor normothermic TLV elicited a similar protection. CONCLUSIONS: Ultrafast cooling instituted by TLV exerts potent neurological and cardiac protection in an experimental model of cardiac arrest in rabbits. This could be a relevant approach to provide a global and protective hypothermia against the post-cardiac arrest syndrome.
| S-EPMC3375236 | biostudies-literature
Project description:BackgroundTotal liquid ventilation (TLV) of the lungs could provide radically new benefits in critically ill patients requiring lung lavage or ultra-fast cooling after cardiac arrest. It consists in an initial filling of the lungs with perfluorocarbons and subsequent tidal ventilation using a dedicated liquid ventilator. Here, we propose a new paradigm for a lung-conservative TLV using pulmonary volumes of perfluorocarbons below functional residual capacity (FRC).Methods and findingsUsing a dedicated technology, we showed that perfluorocarbon end-expiratory volumes could be maintained below expected FRC and lead to better respiratory recovery, preserved lung structure and accelerated evaporation of liquid residues as compared to complete lung filling in piglets. Such TLV below FRC prevented volutrauma through preservation of alveolar recruitment reserve. When used with temperature-controlled perfluorocarbons, this lung-conservative approach provided neuroprotective ultra-fast cooling in a model of hypoxic-ischemic encephalopathy. The scale-up and automating of the technology confirmed that incomplete initial lung filling during TLV was beneficial in human adult-sized pigs, despite larger size and maturity of the lungs. Our results were confirmed in aged non-human primates, confirming the safety of this lung-conservative approach.InterpretationThis study demonstrated that TLV with an accurate control of perfluorocarbon volume below FRC could provide the full potential of TLV in an innovative and safe manner. This constitutes a new paradigm through the tidal liquid ventilation of incompletely filled lungs, which strongly differs from the previously known TLV approach, opening promising perspectives for a safer clinical translation. FUND: ANR (COOLIVENT), FRM (DBS20140930781), SATT IdfInnov (project 273).
| S-EPMC7033528 | biostudies-literature
Project description:To conduct a multinational survey of intensive care unit professionals to determine the practices on delirium assessment and management, in addition to their perceptions and attitudes toward the evaluation and impact of delirium in patients requiring noninvasive ventilation.An electronic questionnaire was created to evaluate the profiles of the respondents and their related intensive care units, the systematic delirium assessment and management and the respondents' perceptions and attitudes regarding delirium in patients requiring noninvasive ventilation. The questionnaire was distributed to the cooperative network for research of the Associação de Medicina Intensiva Brasileira (AMIB-Net) mailing list and to researchers in different centers in Latin America and Europe.Four hundred thirty-six questionnaires were available for analysis; the majority of the questionnaires were from Brazil (61.9%), followed by Turkey (8.7%) and Italy (4.8%). Approximately 61% of the respondents reported no delirium assessment in the intensive care unit, and 31% evaluated delirium in patients under noninvasive ventilation. The Confusion Assessment Method for the intensive care unit was the most reported validated diagnostic tool (66.9%). Concerning the indication of noninvasive ventilation in patients already presenting with delirium, 16.3% of respondents never allow the use of noninvasive ventilation in this clinical context.This survey provides data that strongly reemphasizes poor efforts toward delirium assessment and management in the intensive care unit setting, especially regarding patients requiring noninvasive ventilation.
| S-EPMC4738822 | biostudies-other
Project description:BACKGROUND:The unique communication challenges faced by parents of infants undergoing therapeutic hypothermia have not been well characterized. PURPOSE:To develop awareness of communication challenges experienced by families of infants treated with therapeutic hypothermia. METHODS:Semistructured interviews were conducted in a group setting with parents matched into groups according to the severity of the infant's presenting encephalopathy. The interviews were transcribed and coded into principal and additional subthemes. RESULTS:Thirty adults were interviewed including 15 mothers, 12 fathers, 2 grandmothers, and 1 grandfather. The 15 infants were between 2 and 24 months of age at the time of the interviews. The principal theme of communication included the following 3 subthemes; transparency, consistency, and delivery style. Parents reported a strong desire for improved early and transparent communication about therapeutic hypothermia, particularly during transfer from an outside hospital. Parents also reported a preference for consistent communication and highlighted parental touch of the hypothermic infant, obstetrical nurse-to-neonatal intensive care unit nurse communication, and parent and visitor presence in the infant's room as areas in need of greater communication consistency. Parents valued direct and compassionate communication styles that excluded medical jargon. IMPLICATIONS FOR PRACTICE:All providers can implement recommendations for communication to parents of infants treated with therapeutic hypothermia by increasing transparency, developing greater consistency in the communication delivered, and employing a direct and compassionate style to improve the parental experience of therapeutic hypothermia. IMPLICATIONS FOR RESEARCH:Further investigation is needed into the specific challenges parents face with a lack of transparent communication prior to the transfer of an infant for therapeutic hypothermia.
| S-EPMC5880313 | biostudies-literature
Project description:AIM:Cardiac arrest in the intensive care unit (ICU-CA) is a common and highly morbid event. We investigated the preventability of ICU-CAs and identified targets for future intervention. METHODS:This was a prospective, observational study of ICU-CAs at a tertiary care center in the United States. For each arrest, the clinical team was surveyed regarding arrest preventability. An expert, multi-disciplinary team of physicians and nurses also reviewed each arrest. Arrests were scored 0 (not at all preventable) to 5 (completely preventable). Arrests were considered 'unlikely but potentially preventable' or 'potentially preventable' if at least 50% of reviewers assigned a score of ?1 or ?3 respectively. Themes of preventability were assessed for each arrest. RESULTS:43 patients experienced an ICU-CA and were included. A total of 14 (32.6%) and 13 (30.2%) arrests were identified as unlikely but potentially preventable by the expert panel and survey respondents respectively, and an additional 11 (25.6%) and 10 (23.3%) arrests were identified as potentially preventable. Timing of response to clinical deterioration, missed/incorrect diagnosis, timing of acidemia correction, timing of escalation to a more senior clinician, and timing of intubation were the most commonly cited contributors to potential preventability. Additional themes identified included the administration of anxiolytics/narcotics for agitation later identified to be due to clinical deterioration and misalignment between team and patient/family perceptions of prognosis and goals-of-care. CONCLUSIONS:ICU-CAs may have preventable elements. Themes of preventability were identified and addressing these themes through data-driven quality improvement initiatives could potentially reduce CA incidence in critically-ill patients.
| S-EPMC7076735 | biostudies-literature
Project description:Intensive care unit patients undergoing mechanical ventilation have traditionally been sedated to make them comfortable and to avoid pain and anxiety. However, this may lead to prolonged mechanical ventilation and a longer length of stay.The aim of this retrospective study was to explore whether different sedation regimens influence the course and duration of the weaning process.Intubated adult patients (n = 152) from 15 general intensive care units in Sweden were mechanically ventilated for ? 24 h. Patients were divided into three groups according to the sedative(s) received during the weaning period (i.e. from being assessed as 'fit for weaning' until extubation): dexmedetomidine alone (DEX group, n = 32); standard of care with midazolam and/or propofol (SOC group, n = 67); or SOC plus dexmedetomidine (SOCDEX group, n = 53).Patients receiving dexmedetomidine alone were weaned more rapidly than those in the other groups despite spending longer time on mechanical ventilation prior to weaning. Anxiety during weaning was present in 0, 9 and 24% patients in the DEX, SOC and SOCDEX groups, respectively. Anxiety after extubation was present in 41, 20 and 34% in the DEX, SOC and SOCDEX groups, respectively. Delirium during weaning was present in 1, 2 and 1 patient in the DEX, SOC and SOCDEX groups, respectively. Delirium at ICU discharge was present in 1, 0 and 3 patients in the DEX, SOC and SOCDEX groups, respectively. Few patients fulfilled criteria for post-traumatic stress disorder.Dexmedetomidine, used as a single sedative, may have contributed to a shorter weaning period than SOC or SOCDEX. Patients who received dexmedetomidine-only sedation tended to report better health-related quality of life than those receiving other forms of sedation.
| S-EPMC5951865 | biostudies-other
Project description:To determine types of potentially (PIMs) and actually inappropriate medications (AIMs), which PIMs are most likely to be considered AIMs, and risk factors for PIMs and AIMs at hospital discharge in elderly intensive care unit (ICU) survivors.Prospective cohort study.Tertiary care, academic medical center.One hundred twenty individuals aged 60 and older who survived an ICU hospitalization.Potentially inappropriate medications were defined according to published criteria; a multidisciplinary panel adjudicated AIMs. Medications from before admission, ward admission, ICU admission, ICU discharge, and hospital discharge were abstracted. Poisson regression was used to examine independent risk factors for hospital discharge PIMs and AIMs.Of 250 PIMs prescribed at discharge, the most common were opioids (28%), anticholinergics (24%), antidepressants (12%), and drugs causing orthostasis (8%). The three most common AIMs were anticholinergics (37%), nonbenzodiazepine hypnotics (14%), and opioids (12%). Overall, 36% of discharge PIMs were classified as AIMs, but the percentage varied according to drug type. Whereas only 16% of opioids, 23% of antidepressants, and 10% of drugs causing orthostasis were classified as AIMs, 55% of anticholinergics, 71% of atypical antipyschotics, 67% of nonbenzodiazepine hypnotics and benzodiazepines, and 100% of muscle relaxants were deemed AIMs. The majority of PIMs and AIMs were first prescribed in the ICU. Preadmission PIMs, discharge to somewhere other than home, and discharge from a surgical service predicted number of discharge PIMs, but none of the factors predicted AIMs at discharge.Certain types of PIMs, which are commonly initiated in the ICU, are more frequently considered inappropriate upon clinical review. Efforts to reduce AIMs in elderly ICU survivors should target these specific classes of medications.
| S-EPMC3713508 | biostudies-literature
Project description:Background and objectivePost-cardiac arrest (CA) syndrome is heterogenous in their clinical presentations and outcomes. This study aimed to explore the transition and stability of subphenotypes (profiles) of CA treated in the intensive care unit (ICU).Patients and methodsClinical features of CA patients on day 1 and 3 after ICU admission were modeled by latent transition analysis (LTA) to explore the transition between subphenotypes over time. The association between different transition patterns and mortality outcome was explored using multivariable logistic regression.ResultsWe identified 848 eligible patients from the database. The LPA identified three distinct subphenotypes: Profile 1 accounted for the largest proportion (73%) and was considered as the baseline subphenotype. Profile 2 (13%) was characterized by brain injury and profile 3 (14%) was characterized by multiple organ dysfunctions. The same three subphenotypes were identified on day 3. The LTA showed consistent subphenotypes. A majority of patients in profile 2 (72%) and 3 (82%) on day 1 switched to profile 1 on day 3. In the logistic regression model, patients in profile 1 on day 1 transitioned to profile 3 had worse survival outcome than those continue to remain in profile 1 (OR: 20.64; 95% CI: 6.01 to 70.94; p < 0.001) and transitioned to profile 2 (OR: 8.42; 95% CI: 2.22 to 31.97; p = 0.002) on day 3.ConclusionThe study identified three subphenotypes of CA, which was consistent on day 1 and 3 after ICU admission. Patients who transitioned to profile 3 on day 3 had significantly worse survival outcome than those remained in profile 1 or 2.
| S-EPMC8158944 | biostudies-literature
Project description:ObjectiveHypothermia is believed to affect more than half of Ethiopian neonates. The goal of this study is to determine risk factors for newborn hypothermia in neonates admitted to public hospitals in the east Wollega zone of western Ethiopia's neonatal intensive care unit.DesignUnmatched case-control study using neonates admitted to the intensive care unit.SettingNeonatal intensive care units at public hospitals in western Ethiopia.PatientsNeonates admitted to intensive care units.Main outcomesThe cases were all neonates with hypothermia (less than 36.5°C) and the controls were all neonates with a body temperature of greater or equal to 36.5°C when admitted to the neonatal intensive care unit for other reasons.ResultsThe study involved the participation of 73 cases and 146 controls. The study found that delayed breastfeeding initiation after 1 hour (adjusted OR (AOR)=3.72; 95% CI: 1.39 to 10.00), admission weight less than 2500 g (AOR=3.43; 95% CI: 1.18 to 9.97), cardiopulmonary resuscitation at birth (AOR=3.42; 95% CI: 1.16 to 10.10.08), lack of immediate skin-to-skin contact with their mother (AOR=4.54; 95% CI: 1.75 to 11.81), night-time delivery (AOR=6.63; 95% CI: 2.23 to 19.77) and not wearing a cap (AOR=2.98; 95% CI: 1.09 to 8.15) were all associated with newborn hypothermia.ConclusionsNeonatal hypothermia was associated with obstetric, neonatal and healthcare provider factors. As a result, special consideration should be given to the thermal care of low birthweight neonates and the implementation of warm-chain principles with low-cost thermal protection in Ethiopian public health facilities.
| S-EPMC8522663 | biostudies-literature