Abstract:
OBJECTIVE:Supplementation with tetrahydrobiopterin, a nitric oxide synthase cofactor, may reduce microvascular endothelial dysfunction in severe sepsis. We studied whether tetrahydrobiopterin administration exerts beneficial effects in an ovine septic shock model. DESIGN:Randomized animal study. SETTING:University hospital animal research laboratory. SUBJECTS:Fourteen adult female sheep. INTERVENTIONS:Fecal peritonitis was induced, and the sheep were randomized to receive tetrahydrobiopterin (n=7), given intravenously as 20 mg/kg boluses at 4 and 12 hrs after sepsis induction, or placebo (n=7). All animals were fluid resuscitated. The experiment was continued until death or for a maximum of 30 hrs. MEASUREMENTS AND MAIN RESULTS:In addition to standard hemodynamic assessment, the sublingual microcirculation was evaluated using sidestream dark-field videomicroscopy. The first bolus of tetrahydrobiopterin blunted the increase in heart rate and cardiac index seen in the control group without affecting mean arterial pressure, and the second bolus of tetrahydrobiopterin prevented the decreases in cardiac index and mean arterial pressure. The reduction in mixed venous blood oxygen saturation and the increase in blood lactate seen in the control group were also delayed. Tetrahydrobiopterin significantly attenuated the deterioration in perfused small vessel proportion and density, microvascular flow index, and the increase in microvascular heterogeneity observed in the control group. Tetrahydrobiopterin was associated with better preserved lung compliance and PaO2/FIO2 ratio, which were associated with a lower lung wet/dry weight ratio at the end of the study. Median survival time was significantly prolonged in the tetrahydrobiopterin group (25.0 vs. 17.8 hrs, p<.01). CONCLUSION:In this clinically relevant model of sepsis, tetrahydrobiopterin supplementation attenuated the impairment in sublingual microvascular perfusion and permeability, which was accompanied by better preserved gas exchange, renal flow and urine output, and prolonged survival.
journal_name
Crit Care Medjournal_title
Critical care medicineauthors
He X,Su F,Velissaris D,Salgado DR,de Souza Barros D,Lorent S,Taccone FS,Vincent JL,De Backer Ddoi
10.1097/CCM.0b013e31825b88basubject
Has Abstractpub_date
2012-10-01 00:00:00pages
2833-40issue
10eissn
0090-3493issn
1530-0293journal_volume
40pub_type
杂志文章abstract::Recent strides in computational biology and high-throughput technologies have generated considerable interest in understanding complex biological systems. The application of these technologies to critical illness and injury offers the potential to define adaptive and maladaptive programs of gene expression induced by ...
journal_title:Critical care medicine
pub_type: 杂志文章,评审
doi:10.1097/ccm.0b013e318186a720
更新日期:2008-10-01 00:00:00
abstract:OBJECTIVE:To investigate the impact of prophylactic continuous lateral rotation therapy on the prevalence of ventilator-associated pneumonia, duration of mechanical ventilation, length of stay, and mortality in critically ill medical patients. DESIGN:Prospective, randomized, clinical study. SETTING:Three medical inte...
journal_title:Critical care medicine
pub_type: 杂志文章,随机对照试验
doi:10.1097/CCM.0b013e3181bc8218
更新日期:2010-02-01 00:00:00
abstract:OBJECTIVE:To alert health professionals to the need for early detection and prevention of shock in critically ill patients. By describing the associations between intramucosal acidosis in the gut and multiple system organ failure, the author demonstrates how noninvasive measurement of gut intramucosal pH can be used to...
journal_title:Critical care medicine
pub_type: 杂志文章,评审
doi:10.1097/00003246-199302001-00017
更新日期:1993-02-01 00:00:00
abstract:OBJECTIVE:To explore the potential value of heart rate variability features for automated monitoring of sedation levels in mechanically ventilated ICU patients. DESIGN:Multicenter, pilot study. SETTING:Several ICUs at Massachusetts General Hospital, Boston, MA. PATIENTS:Electrocardiogram recordings from 40 mechanica...
journal_title:Critical care medicine
pub_type: 杂志文章,多中心研究
doi:10.1097/CCM.0000000000001708
更新日期:2016-09-01 00:00:00
abstract::Twenty-one patients who underwent cardiopulmonary bypass for myocardial revascularization received postoperatively controlled mechanical ventilation (CMV) or intermittent mandatory ventilation (IMV), with or without positive end-expiratory pressure (PEEP). Functional residual capacity (FRC), right-to-left intrapulmona...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:10.1097/00003246-197611000-00002
更新日期:1976-11-01 00:00:00
abstract:OBJECTIVE:This survey was designed to study current practices in the monitoring and treatment of patients with severe head injury in the United States. DATA SOURCES:The collected data represent answers to telephone interviews of nurse managers, clinical specialists, and staff nurses specializing in neurotrauma care at...
journal_title:Critical care medicine
pub_type: 杂志文章,多中心研究
doi:10.1097/00003246-199503000-00023
更新日期:1995-03-01 00:00:00
abstract:OBJECTIVE:Physiologic and pathologic comparison of two modes of assisted ventilation, nasal intermittent positive-pressure ventilation (NIPPV) and synchronized intermittent mandatory ventilation (SIMV), in spontaneously breathing term newborn piglets with saline lavage-induced lung injury. DESIGN:After inducing acute ...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:10.1097/01.CCM.0000295311.61378.7D
更新日期:2008-01-01 00:00:00
abstract:OBJECTIVE:To date, no study has systematically investigated the impact of drowning-induced asphyxia on hemostasis. Our objective was to test the hypothesis that asphyxia induces bleeding by hyperfibrinolytic disseminated intravascular coagulation. DESIGN:Observational study. SETTING:A 2,100-bed tertiary care facility...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:10.1097/CCM.0000000000001273
更新日期:2015-11-01 00:00:00
abstract:BACKGROUND:Remarkable progress has been made during the last decade in defining the molecular mechanisms that underlie septic shock. This rapidly expanding field is leading to new therapeutic opportunities in the management of severe sepsis. AIM:To provide the clinician with a timely summary of the molecular biology o...
journal_title:Critical care medicine
pub_type: 杂志文章,评审
doi:10.1097/CCM.0b013e31819267fb
更新日期:2009-01-01 00:00:00
abstract::The conjunctival oxygen monitor reflects oxygen tension of the internal carotid artery without introducing the heating artifact characteristic of transcutaneous monitors. It is now being used in the ICU and the operating room to measure accurately and continuously Po2 and temperature of conjunctival tissue. We examine...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:10.1097/00003246-198508000-00016
更新日期:1985-08-01 00:00:00
abstract:OBJECTIVE:Pathogens that cause pneumonia may be treated in a targeted fashion by antibiotics, but if this therapy fails, then treatment involves only nonspecific supportive measures, independent of the inciting infection. The purpose of this study was to determine whether host response is similar after disparate infect...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:10.1097/CCM.0b013e3181b4a76b
更新日期:2010-01-01 00:00:00
abstract:OBJECTIVE:To determine the specific effect of peak volume history pressure on the inflation limb of the pressure-volume curve and peak pressure-volume curve pressure on the deflation limb of the pressure-volume curve. DESIGN:Prospective assessment of pressure-volume curves in saline, lung lavage injured sheep. SETTIN...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:10.1097/01.ccm.0000128573.28173.2e
更新日期:2004-06-01 00:00:00
abstract:OBJECTIVE:Our intent was to evolve a prognosticator that would predict the likelihood that an electrical shock would restore a perfusing rhythm. Such a prognosticator was to be based on conventional electrocardiographic signals but without constraints caused by artifacts resulting from precordial compression. The adver...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:10.1097/00003246-200112000-00019
更新日期:2001-12-01 00:00:00
abstract:OBJECTIVE:Acute lung injury results in acute respiratory distress syndrome. There is no standard therapy for acute respiratory distress syndrome but supportive care. Stem cells offer a new therapeutic potential for tissue regeneration as a result of their self-renewal, multipotency, and paracrine capabilities. The obje...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:10.1097/CCM.0b013e31823bc89a
更新日期:2012-04-01 00:00:00
abstract:OBJECTIVES:To compare the frequency and preventability of adverse drug events and potential adverse drug events in intensive care units (ICUs) and non-ICUs. To evaluate systems factors involving the individual caregivers, care unit teams, and patients involved in each adverse drug event by comparing ICUs with non-ICUs ...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:10.1097/00003246-199708000-00014
更新日期:1997-08-01 00:00:00
abstract:OBJECTIVE:Inotropic and vasopressor drugs are routinely used in critically ill patients to maintain adequate blood pressure and cardiac output in patients with cardiogenic shock although potentially at the expense of increasing myocardial oxygen demand. Pacing optimization has been demonstrated as effective in reducing...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:10.1097/CCM.0000000000001655
更新日期:2016-08-01 00:00:00
abstract:OBJECTIVE:To determine the impact of the rotation of antimicrobial agents on the rates of infection, intestinal colonization, and acquisition with antimicrobial-resistant Gram-negative bacteria. DESIGN:Pre- and postintervention design. SETTING:A 19-bed, medical intensive care unit. PATIENTS:Individuals admitted to t...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:10.1097/01.ccm.0000147685.79487.28
更新日期:2004-12-01 00:00:00
abstract:OBJECTIVES:Hepatic ischemia-reperfusion is a major clinical problem with limited treatment options. The pathophysiology of hepatic ischemia-reperfusion is characterized by mitochondrial dysfunction and cellular energy deficits. Sirtuin 1 is an energy-sensing enzyme known to modulate mitochondrial biogenesis. We hypothe...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:10.1097/CCM.0000000000001637
更新日期:2016-08-01 00:00:00
abstract:BACKGROUND AND METHODS:The development of a multifactorial coagulopathy after massive transfusion is a well-recognized clinical problem that is almost always accompanied by hypothermia. The purpose of this study was to investigate the isolated effect of alterations of temperature on the integrity of the coagulation cas...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:10.1097/00003246-199210000-00007
更新日期:1992-10-01 00:00:00
abstract:OBJECTIVE:To review the physiology of the regulation and determinants of heart rate and the significance in the management of critically ill patients. DATA SOURCES:The MEDLINE database, references from selected articles, and the author's personal database. DATA SYNTHESIS:This review begins with the regulation of card...
journal_title:Critical care medicine
pub_type: 杂志文章,评审
doi:10.1097/CCM.0b013e318232e50c
更新日期:2012-01-01 00:00:00
abstract::High frequency positive pressure ventilation (HFPPV) was compared with normal frequency positive pressure ventilation (NFPPV) during diagnostic fiberoptic-bronchoscopy. HFPPV was achieved by a simple modification of the Minivent, and gave satisfactory alveolar ventilation and oxygenation. In all 11 patients and over p...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:
更新日期:1982-11-01 00:00:00
abstract:OBJECTIVE:Heatstroke requires active body cooling and organ failure supportive care. Although heat waves are expected to recur over the next decades, little is known about the risk factors for mortality in heatstroke patients. We examined the prognosis and risk factors for hospital mortality in patients with heatstroke...
journal_title:Critical care medicine
pub_type: 评论,杂志文章,多中心研究
doi:10.1097/01.CCM.0000206469.33615.02
更新日期:2006-04-01 00:00:00
abstract:OBJECTIVE:There is evidence to suggest that anemia after severe traumatic brain injury (sTBI) is detrimental. However, there is a paucity of evidence supporting the use of transfusion of packed red blood cells in patients with sTBI. To understand the acute effect of packed red blood cell transfusion on cerebral oxygena...
journal_title:Critical care medicine
pub_type: 杂志文章,随机对照试验
doi:10.1097/CCM.0b013e318194ad22
更新日期:2009-03-01 00:00:00
abstract::This study evaluates the recall of 100 patients after ICU admission. There was a wide spectrum of race, religion, occupation, and educational levels. The more common diagnoses included asthma, pneumonia, trauma, and adult respiratory distress syndrome. The average Acute Physiology and Chronic Health Evaluation (APACHE...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:10.1097/00003246-199009000-00012
更新日期:1990-09-01 00:00:00
abstract:BACKGROUND:Increased intracranial pressure (ICP) worsens the outcome of acute liver failure (ALF). This study investigates the underlying pathophysiological mechanisms and evaluates the therapeutic effect of albumin dialysis in ALF with use of the Molecular Adsorbents Recirculating System without hemofiltration/dialysi...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:10.1097/01.ccm.0000196203.39832.3c
更新日期:2006-01-01 00:00:00
abstract::Several variables may account for the response of electrochemical skin surface PO2 sensors to anesthetic gases: cathode material and size, pH of the electrolyte and membrane material. These variables cannot be chosen arbitrarily and their influence has been tested with two types of sensors. In one type (LSC), a large ...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:10.1097/00003246-198110000-00010
更新日期:1981-10-01 00:00:00
abstract:OBJECTIVES:Despite the universal proliferation of emergency medical services programs throughout the United States since 1970, only a few have ever documented a valid lifesaving effect, particularly in large, urban centers. The purpose of this study was to demonstrate the effect of specialized physician supervision on ...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:10.1097/00003246-199309000-00009
更新日期:1993-09-01 00:00:00
abstract:OBJECTIVES:To evaluate the impact of an emergency department mechanical ventilation protocol on clinical outcomes and adherence to lung-protective ventilation in patients with acute respiratory distress syndrome. DESIGN:Quasi-experimental, before-after trial. SETTING:Emergency department and ICUs of an academic cente...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:10.1097/CCM.0000000000002268
更新日期:2017-04-01 00:00:00
abstract:OBJECTIVES:Previous workers have demonstrated that controlled mechanical ventilation results in diaphragm inactivity and elicits a rapid development of diaphragm weakness as a result of both contractile dysfunction and fiber atrophy. Limited data exist regarding the impact of pressure support ventilation, a commonly us...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:10.1097/CCM.0b013e31823c8cc9
更新日期:2012-04-01 00:00:00
abstract:OBJECTIVE:To determine whether partial liquid ventilation (PLV) affects the risk of nosocomial pneumonia. STUDY DESIGN:To assess in vitro bacterial adhesion and viability after liquid perfluorocarbon exposure and to assess bacterial recovery after partial liquid ventilation in vivo in rabbits. SETTING:University anim...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:10.1097/00003246-199912000-00023
更新日期:1999-12-01 00:00:00