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Mechanical Ventilation (mechanical + ventilation)
Kinds of Mechanical Ventilation Selected AbstractsThe Relationship between Hospital Volume and Mortality in Mechanical Ventilation: An Instrumental Variable AnalysisHEALTH SERVICES RESEARCH, Issue 3 2009Jeremy M. Kahn Objective. To examine the relationship between hospital volume and mortality for nonsurgical patients receiving mechanical ventilation. Data Sources. Pennsylvania state discharge records from July 1, 2004, to June 30, 2006, linked to the Pennsylvania Department of Health death records and the 2000 United States Census. Study Design. We categorized all general acute care hospitals in Pennsylvania (n=169) by the annual number of nonsurgical, mechanically ventilated discharges according to previous criteria. To estimate the relationship between annual volume and 30-day mortality, we fit linear probability models using administrative risk adjustment, clinical risk adjustment, and an instrumental variable approach. Principle Findings. Using a clinical measure of risk adjustment, we observed a significant reduction in the probability of 30-day mortality at higher volume hospitals (,300 admissions per year) compared with lower volume hospitals (<300 patients per year; absolute risk reduction: 3.4%, p=.04). No significant volume,outcome relationship was observed using only administrative risk adjustment. Using the distance from the patient's home to the nearest higher volume hospital as an instrument, the volume,outcome relationship was greater than observed using clinical risk adjustment (absolute risk reduction: 7.0%, p=.01). Conclusions. Care in higher volume hospitals is independently associated with a reduction in mortality for patients receiving mechanical ventilation. Adequate risk adjustment is essential in order to obtained unbiased estimates of the volume,outcome relationship. [source] Mechanical Ventilation Exacerbates Alveolar Macrophage Dysfunction in the Lungs of Ethanol-Fed RatsALCOHOLISM, Issue 8 2005Pradip P. Kamat Background: Patients with alcohol abuse have a two- to three-fold increased risk of acute lung injury and respiratory failure after sepsis or trauma but are also at increased risk of nosocomial pneumonia. Mechanical ventilation exacerbates lung injury during critical illnesses. In this study we tested whether mechanical ventilation of the alcoholic lung promotes on balance a proinflammatory phenotype favoring ventilator-induced lung injury or an immunosuppressive phenotype favoring ventilator-associated pneumonia. Methods: Lungs from rats fed an isocaloric diet with or without ethanol (six weeks) were isolated and ventilated ex vivo with a low-volume (protective) or high-volume (injurious) strategy for two hours with or without prior endotoxemia (two hours). In other experiments, rats were subjected to high-volume ventilation in vivo. Airway levels of the proinflammatory cytokines tumor necrosis factor-,, macrophage inflammatory protein-2, and interleukin-1, were determined after mechanical ventilation ex vivo and compared with edematous lung injury after high-volume ventilation in vivo. In parallel, alveolar macrophage phagocytosis of bacteria and secretion of interleukin-12 during ventilation ex vivo and endotoxin-stimulated alveolar macrophage phagocytosis and tumor necrosis factor-, secretion in vitro were determined. Results: Ethanol ingestion suppressed the proinflammatory response to injurious mechanical ventilation and did not increase experimental ventilator-induced lung injury. In parallel, ethanol ingestion blunted the innate immune response of alveolar macrophages during injurious ventilation ex vivo and after endotoxin stimulation in vitro. Conclusions: Ethanol ingestion dampens ventilator-induced inflammation but exacerbates macrophage immune dysfunction. These findings could explain at least in part why alcoholic patients are at increased risk of ventilator-associated pneumonia. [source] Core Topics in Mechanical VentilationANAESTHESIA, Issue 9 2009Chris Harber No abstract is available for this article. [source] Mechanical Ventilation Was Associated with Acidemia in a Case Series of Salicylate-poisoned PatientsACADEMIC EMERGENCY MEDICINE, Issue 9 2008Andrew I. Stolbach MD Abstract Objectives:, Despite little empiric evidence, mechanical ventilation (MV) in the setting of salicylate poisoning is considered by many to be harmful. When salicylate-poisoned patients are ventilated at conventional settings, the respiratory alkalosis is abolished, more salicylate is able to pass into the central nervous system (CNS), and neurotoxicity worsens. The objective of this study was to identify a relationship between MV, acidosis, and outcome in salicylate-poisoned patients. Methods:, The authors electronically searched a poison control center (PCC) database (2001,2007) for patients with salicylate poisoning, defined as a serum concentration >50 mg/dL, who had MV listed as a therapy. For the 7-year study period, a total of 3,144 salicylate-poisoning cases were identified. Eleven patients met the inclusion criteria of having both salicylate concentrations >50 mg/dL and required MV; only 7 of them had post-MV data available. Results:, In all seven patients with post-MV blood gas data, the post-MV pH was <7.4. In five of six patients with recorded PCO2, the post-MV PCO2 was >50 mm Hg. Two of the seven patients in the study group died following intubation (two patients died within 3 hours [serum salicylate concentrations, 85 and 79 mg/dL, respectively]). Another patient sustained severe neurologic injury (serum salicylate concentration, 84 mg/dL). The other four patients were ultimately discharged home. In the three patients with the worst clinical outcome, deterioration was reported within hours of intubation. Conclusions:, Inadequate MV of patients with salicylate poisoning is associated with respiratory acidosis, acidemia, and clinical deterioration in this series of cases. This supports warnings about the danger of improper MV in patients with salicylate poisoning. A prospective study should be performed. [source] Mechanical ventilation for respiratory failure in children with severe neurological impairment: is it futile medical treatment?DEVELOPMENTAL MEDICINE & CHILD NEUROLOGY, Issue 5 2010JOSEPHUS PJ VAN GESTEL Aim, To assess outcome for children with severe neurological impairment receiving invasive mechanical ventilation for respiratory failure. Method, Medical charts for all such children treated in our intensive care unit (ICU) between January 2003 and July 2008 were reviewed. Outcomes were compared with those for children with moderate neurological impairment. Results, Twenty-two children with severe neurological impairment were included (nine females, 13 males; median age 7y 10mo; range 4mo,17y). The median duration of mechanical ventilation was 16 days. Six children had an uneventful 1-year survival, the others required reintubation or readmission to the ICU, or died. Eleven children were still alive 1 year after discharge from the ICU. Nine patients died of respiratory failure. None of the children in the severe group died of a heart defect. Eleven children with moderate neurological impairment were included (eight females, three males; median age 1y 1mo, range 4mo,13y). Four children had an uneventful 1-year survival. Eight children were still alive 1 year after discharge from the ICU. Two of the three non-survivors died of their heart defects. Interpretation, Mechanical ventilation for respiratory failure in children with severe neurological impairment is complex and associated with limited survival. However, it cannot be regarded as futile medical treatment. Further studies are urgently needed for the rational guidance of clinical decision-making. [source] Effect of Off-Pump Coronary Artery Bypass Grafting on Risk-Adjusted and Cumulative Sum Failure Outcomes After Coronary Artery SurgeryJOURNAL OF CARDIAC SURGERY, Issue 6 2002Richard J. Novick M.D. We therefore applied CUSUM, as well as standard statistical techniques, to analyze a surgeon's experience with off-pump coronary artery bypass grafting (OPCAB) and on-pump procedures to determine whether the two techniques have similar or different outcomes. Methods: In 320 patients undergoing nonemergent, first time coronary artery bypass grafting, preoperative patient characteristics, rates of mortality and major complications, and ICU and hospital lengths of stay were compared between the on-pump and OPCAB cohorts using Fisher's exact tests and Wilcoxon two sample tests. Predicted mortality and length of stay were determined using previously validated models of the Cardiac Care Network of Ontario. Observed versus expected ratios of both variables were calculated for the two types of procedures. Furthermore, CUSUM curves were constructed for the on-pump and OPCAB cohorts. A multivariable analysis of the predictors of hospital length of stay was also performed to determine whether the type of coronary artery bypass procedure had an independent impact on this variable. Results: The predicted mortality risk and predicted hospital length of stay were almost identical in the 208 on-pump patients ( 2.2 ± 3.9% ; 8.2 ± 2.5 days) and the 112 OPCAB patients ( 2.0 ± 2.2% ; 7.8 ± 2.1 days). The incidence of hospital mortality and postoperative stroke were 2.9% and 2.4% in on-pump patients versus zero in OPCAB patients (p= 0.09 and 0.17, respectively). Mechanical ventilation for greater than 48 hours was significantly less common in OPCAB (1.8%) than in on-pump patients (7.7%, p= 0.04). The rate of 10 major complications was 14.9% in on-pump versus 8.0% in OPCAB patients (p= 0.08). OPCAB patients experienced a hospital length of stay that was a median of 1.0 day shorter than on-pump patients (p= 0.01). The observed versus expected ratio for length of stay was 0.78 in OPCAB patients versus 0.95 in on-pump patients. On CUSUM analysis, the failure curve in OPCAB patients was negative and was flatter than that of on-pump patients throughout the duration of the study. Furthermore, OPCAB was an independent predictor of a reduced hospital length of stay on multivariable analysis. Conclusions: OPCAB was associated with better outcomes than on-pump coronary artery bypass despite a similar predicted risk. This robust finding was documented on sensitive CUSUM analysis, using standard statistical techniques and on a multivariable analysis of the independent predictors of hospital length of stay.(J Card Surg 2002;17:520-528) [source] Isoflurane attenuates pulmonary interleukin-1, and systemic tumor necrosis factor-, following mechanical ventilation in healthy miceACTA ANAESTHESIOLOGICA SCANDINAVICA, Issue 6 2009M. VANEKER Background: Mechanical ventilation (MV) induces an inflammatory response in healthy lungs. The resulting pro-inflammatory state is a risk factor for ventilator-induced lung injury and peripheral organ dysfunction. Isoflurane is known to have protective immunological effects on different organ systems. We tested the hypothesis that the MV-induced inflammatory response in healthy lungs is reduced by isoflurane. Methods: Healthy C57BL6 mice (n=34) were mechanically ventilated (tidal volume, 8 ml/kg; positive end-expiratory pressure, 4 cmH2O; and fraction of inspired oxygen, 0.4) for 4 h under general anesthesia using a mix of ketamine, medetomidine and atropine (KMA). Animals were divided into four groups: (1) Unventilated control group; (2) MV group using KMA anesthesia; (3) MV group using KMA with 0.25 MAC isoflurane; (4) MV group using KMA with 0.75 MAC isoflurane. Cytokine levels were measured in lung homogenate and plasma. Leukocytes were counted in lung tissue. Results: Lung homogenates: MV increased pro-inflammatory cytokines. In mice receiving KMA+ isoflurane 0.75 MAC, no significant increase in interleukin (IL)-1, was found compared with non-ventilated control mice. Plasma: MV induced a systemic pro-inflammatory response. In mice anesthetized with KMA+ isoflurane (both 0.25 and 0.75 MAC), no significant increase in tumor necrosis factor (TNF)-, was found compared with non-ventilated control mice. Conclusions: The present study is the first to show that isoflurane attenuates the pulmonary IL-1, and systemic TNF-, response following MV in healthy mice. [source] Which patients benefit from hemodialysis therapy in hepatorenal syndrome?JOURNAL OF GASTROENTEROLOGY AND HEPATOLOGY, Issue 12 2004OLIVER WITZKE Abstract Background and Aim:, Hepatorenal syndrome (HRS) occurs in patients with advanced liver cirrhosis and has a poor outcome. The aim of the present study was to investigate which patients with HRS are likely to benefit from hemodialysis. Methods:, Data were collected prospectively from 30 patients with Child-Pugh C liver cirrhosis and HRS. Patients were either treated with continuous veno-venous hemodialysis (CVVHD) if they were mechanically ventilated, or with intermittent hemodialysis (HD) if they were not mechanically ventilated. Prognosis was assessed by the Child-Pugh and by the Model for End-Stage Liver Disease (MELD) score. The primary aim of the study was the analysis of overall and 30-day patient survival during hemodialysis therapy. To identify predictive factors of survival, variables obtained before the initiation of dialysis therapy were evaluated. Results:, Patients' 30-day survival was 8/30 (median survival time 21 days). Among patients treated with mechanical ventilation, 30-day survival time was 0/15 while 8/15 patients without mechanical ventilation survived more than 30 days (P < 0.001). Using a multivariate model, the relative hazards for serum albumin, international normalized ratio (INR) and catecholamine therapy were not different from one another (P > 0.05), indicating that these parameters were not independent predictors of survival. Mechanical ventilation was an independent risk factor for 30-day (relative hazard 6.6 [1.6,27.7], P < 0.001) and overall survival (relative hazard 6.3 [1.5,26.5], P = 0.01). Child-Pugh (P < 0.01) and the MELD (P < 0.01) score were predictive for overall survival independent of mechanical ventilation. Conclusions:, Patients with HRS without mechanical ventilation may benefit from hemodialysis, whereas hemodialysis seems to be futile in patients with mechanical ventilation. [source] Mechanical Ventilation Exacerbates Alveolar Macrophage Dysfunction in the Lungs of Ethanol-Fed RatsALCOHOLISM, Issue 8 2005Pradip P. Kamat Background: Patients with alcohol abuse have a two- to three-fold increased risk of acute lung injury and respiratory failure after sepsis or trauma but are also at increased risk of nosocomial pneumonia. Mechanical ventilation exacerbates lung injury during critical illnesses. In this study we tested whether mechanical ventilation of the alcoholic lung promotes on balance a proinflammatory phenotype favoring ventilator-induced lung injury or an immunosuppressive phenotype favoring ventilator-associated pneumonia. Methods: Lungs from rats fed an isocaloric diet with or without ethanol (six weeks) were isolated and ventilated ex vivo with a low-volume (protective) or high-volume (injurious) strategy for two hours with or without prior endotoxemia (two hours). In other experiments, rats were subjected to high-volume ventilation in vivo. Airway levels of the proinflammatory cytokines tumor necrosis factor-,, macrophage inflammatory protein-2, and interleukin-1, were determined after mechanical ventilation ex vivo and compared with edematous lung injury after high-volume ventilation in vivo. In parallel, alveolar macrophage phagocytosis of bacteria and secretion of interleukin-12 during ventilation ex vivo and endotoxin-stimulated alveolar macrophage phagocytosis and tumor necrosis factor-, secretion in vitro were determined. Results: Ethanol ingestion suppressed the proinflammatory response to injurious mechanical ventilation and did not increase experimental ventilator-induced lung injury. In parallel, ethanol ingestion blunted the innate immune response of alveolar macrophages during injurious ventilation ex vivo and after endotoxin stimulation in vitro. Conclusions: Ethanol ingestion dampens ventilator-induced inflammation but exacerbates macrophage immune dysfunction. These findings could explain at least in part why alcoholic patients are at increased risk of ventilator-associated pneumonia. [source] Mechanical ventilation of a cloned calf in respiratory failureJOURNAL OF VETERINARY EMERGENCY AND CRITICAL CARE, Issue 2 2007DACVIM, Sébastien Buczinski Dr. Vet Abstract Objective: To report the use of mechanical ventilation in a calf suffering from respiratory failure. Case summary: A full-term clone calf born by cesarean section showed signs of respiratory failure that did not respond to intranasal oxygen therapy. Thoracic radiographs were compatible with a diffuse interstitial and alveolar pattern. The calf was successfully managed with 3 days of mechanical ventilation and was eventually discharged from the hospital following further therapy for sepsis. Unique information provided: This is the first description of mechanical ventilation in a calf suffering from hypercapnic respiratory failure. Mechanical ventilation may be useful in the treatment of high pedigree merit calves. The procedure was well tolerated and the calf was able to drink easily during nasotracheal ventilation. [source] Interpretation of radial pulse contour during fentanyl/nitrous oxide anesthesia and mechanical ventilationACTA ANAESTHESIOLOGICA SCANDINAVICA, Issue 7 2002S. Söderström Background: Peripheral arterial blood pressure is not a reliable substitute for proximal aortic pressure. Recognition of this phenomenon is important for correct appreciation of cardiac afterload. Our aim was to evaluate the utility of the radial pulse wave to better understand ventriculo-vascular coupling during anesthesia. Methods: We observed the differences between aortic systolic pressure (AoSAP, tipmanometry) and radial systolic pressure in 15 patients, (including two women) aged 53,78 years, before coronary artery bypass surgery. We studied the induction of anesthesia with fentanyl (20 µg kg,1), moderate volume loading, and thereafter the addition of 70% nitrous oxide. The circulatory effects of mechanical ventilation were studied by doubling the tidal volumes. Pulse wave contours were assessed by calculation of radical and aortic augmentation indices (AI), which measure the second systolic pressure peak. Results: Radial systolic pressure was higher than AoSAP in the control situation (8±2 mmHg), and this SAP gradient increased further with fentanyl (12±2 mmHg). The gradient persisted throughout the study, but was partially reduced by volume loading and nitrous oxide, respectively. Radial augmentation index was the only parameter remaining in a stepwise multivariate model to explain the variance in the SAP gradient (r2=0.48). Radial augmentation index also correlated with aortic pulse pressure (r2=0.71). Mechanical ventilation had significant and similar effects on pulse wave augmentation both in the aorta and in the radial artery, and did not affect the radial to aortic SAP gradient. Conclusion: These elderly coronary patients had stiff vasculature (high aortic AI) and considerable pulse wave reflection, which was beneficially delayed by fentanyl. Changes in the radial pulse wave augmentation during mechanical ventilation were mainly a result of cyclic changes in the stroke volume, and were seldom associated with an increased systolic pressure gradient from the aorta to the radial artery. [source] Rituximab (B-cell depleting antibody) associated lung injury (RALI): A pediatric case and systematic review of the literaturePEDIATRIC PULMONOLOGY, Issue 9 2009Martin Bitzan MD Abstract Introduction Pulmonary toxicity of delayed onset is a rare complication of B-lymphocyte depleting antibody therapy and has been almost exclusively reported in older patients with B-cell malignancies. Aims To describe a pediatric patient with rituximab-associated lung injury (RALI), to systematically analyze previous reports of pulmonary complications, and to summarize common clinico-pathological features, treatment, and outcome. Results A teenage boy with focal segmental glomerulosclerosis (FSGS) presented with progressive dyspnea, fever, hypoxemia and fatigue 18 days after the completion of a second course of rituximab infusions for calcineurin inhibitor-dependent nephrotic syndrome. Respiratory symptoms started while he received high-dose prednisone for persistent proteinuria. Bilateral, diffuse ground-glass infiltrates corresponded to the presence of inflammatory cells in the bronchioalveolar lavage fluid. Empiric antibiotic treatment including clarithromycin was given, but the microbiological work-up remained negative. Serum IgE, C3, and C4 concentrations were normal. He recovered within 3 weeks after onset. We systematically reviewed 23 reports describing 30 additional cases of rituximab-associated lung disease. Twenty eight patients had received rituximab for B-cell malignancies, one for graft-versus-host disease and one for immune thrombocytopenia. Median age was 64 years (interquartile range [IQR] 58,69 years). Seventy one percent received concomitant chemotherapy. Time to onset from the last rituximab dose was 14 days (IQR 11,22 days). Eleven of 31 patients required mechanical ventilation, and 9 died (29%). Ventilation was a significant predictor of fatal outcome (odds ratio 46.7; confidence interval 9.5,229.9). High dose glucocorticoid therapy did not improve survival or prevent severe lung disease or death. Conclusions With the expanding use of rituximab for novel indications, additional cases of RALI affecting younger age groups are expected to emerge. Mechanical ventilation predicts poor outcome. Glucocorticoids may not be protective. Pediatr Pulmonol. 2009; 44:922,934. © 2009 Wiley-Liss, Inc. [source] Mechanical ventilation with high tidal volume or frequency is associated with increased expression of nerve growth factor and its receptor in rabbit lungsPEDIATRIC PULMONOLOGY, Issue 7 2009Rashmi A. Mittal MD Abstract Objective Nerve growth factor (NGF), a neurotrophin, is induced in lung cells by proinflammatory cytokines, and has a role in bronchial hyperreactivity and lung tissue repair. Ventilation induced lung injury, on the other hand, is known to increase the levels of proinflammatory cytokines in the lungs. We investigated whether, and to what extent, various degrees of lung injury induced by short-term ventilation affect NGF levels in the lung tissue of adolescent rabbits. Methods The rabbits were randomized to different modes of ventilation: (1) CON: normal ventilation for 30,min; (2) NVT: normal ventilation for 6,hr; (3) HFQ: ventilation for 6,hr at double frequency, but normal tidal volume (VT); and (4) HVT: 6,hr ventilation at double VT but normal frequency. Results NGF protein was detected in bronchoalveolar lavage fluid (BALF) and lung tissue in all animals. Ventilation for 6,hr significantly increased NGF levels, in both BALF and lung tissue, in the HFQ and HVT groups as compared to control (P,<,0.05). The maximum increase in BALF NGF was seen in the HVT group (P,=,0.02 vs. CON and NVT groups, and P,=,0.05 vs. HFQ). A parallel increase in interleukin 1-, (IL1-,) was observed. Expression of the high-affinity NGF-receptor, tropomyosin-related kinase A (TrkA), was also upregulated in these two groups. Conclusion Injurious modes of mechanical ventilation upregulate NGF and its receptor TrkA in rabbit lungs, and IL1-beta may be a mediator for this response. We speculate that this increase in NGF level may translate into the development of bronchial hyperreactivity. Pediatr Pulmonol. 2009; 44:713,719. © 2009 Wiley-Liss, Inc. [source] Mechanical ventilation in children with severe asthmaPEDIATRIC PULMONOLOGY, Issue 6 2001DMSc, Kristiina Malmström MD Abstract Hospital admissions for childhood asthma have increased during the past few decades. The aim of this study was to describe the need for mechanical ventilation for severe asthma exacerbation in children in Finland from 1976 to 1995. We reviewed medical records and collected data retrospectively from all 5 university hospitals in Finland, thus covering the entire population of about 5 million. The endpoints selected were the number of admissions and readmissions leading to mechanical ventilation, duration of stay in the hospital, and mortality. Moreover, asthma medications prescribed prior to admission and administered in the intensive care unit (ICU), as well as the etiology of the exacerbation associated with mechanical ventilation were examined. Mechanical ventilation was required in 66 ICU admissions (59 patients). This constituted approximately 10% of all 632 admissions for acute asthma to an ICU. The number of admissions decreased from 1976 to 1995: 41 admissions between 1976 and 1985 vs. 25 admissions during the next 10-year period. The mean age at admission to the ICU was 3.6 years, and 46% of the patients were boys. Prior to the index admission, 70% of the patients had used asthma medication such as oral bronchodilator (50%), inhaled bronchodilator (20%), theophylline (38%), inhaled glucocorticoid (18%), oral glucocorticoid (5%), and cromoglycate (7%). Respiratory infection was by far the most common cause of all the exacerbations (61%), followed by food allergy (8%) and gastroesophageal reflux (3%). In 28% of cases the cause of the severe asthma exacerbation could not be identified. In the mechanically ventilated patients readmissions occurred 38 times between 1976 and 1985 vs. 5 times between 1986 and 1995. Five of the patients who received mechanical ventilation died, and in 3 of these patients asthma was the event causing death. In conclusion, there has been decrease in the number of first and repeat ICU admission for asthma requiring mechanical ventilation between 1970 and 1995. This trend occurred despite a simultaneous 5% yearly increase in hospital admissions for childhood asthma during these 2 decades. Pediatr Pulmonol. 2001; 31:405,411. © 2001 Wiley-Liss, Inc. [source] Seizures associated with poisoning in children: tricyclic antidepressant intoxicationPEDIATRICS INTERNATIONAL, Issue 6 2006AGOP ÇITAK Abstract Background: The aim of this study was to examine the characteristics of seizure due to poisoning. Methods: This was a retrospective analysis, throughout 4 years of hospital admissions for poisoning. Data of patients with seizures due to poisoning were evaluated with respect to the causes, frequencies and complications of seizures. Results: Among the 1561 admissions due to intoxication during the review period, seizures developed in 26 cases (1.6%). Tricyclic antidepressant overdose (n = 11, 42%) was the leading cause of seizure due to poisoning. Generalized tonic-clonic seizures were observed in 24 patients. Status epilepticus developed in six patients (23%). Mechanical ventilation was applied in 12 (46%) patients. Cardiac complications were observed in 11 (42%) patients with seizures. Two patients who had cardiac arrest due to acepromazin maleat and imipramine intoxication died. Conclusion: One of the causes of seizures in pediatric age group is intoxication. Seizures due to intoxications may cause serious clinical conditions. Intoxications should be thought when a patient is admitted with the diagnosis of afebrile seizure even if there is no history of drug intake. [source] LMA SupremeTM insertion by novices in manikins and patientsANAESTHESIA, Issue 4 2010B. W. Howes Summary The LMA SupremeÔ has been suggested for use in emergency situations by medical personnel with no experience in endotracheal intubation. We evaluated the LMA Supreme when inserted by non-anaesthetists, firstly in a manikin and then in patients. Fifty airway novices inserted a LMA Supreme in a manikin without any complications so we proceeded to the patient phase. Fifty airway novices inserted the LMA Supreme in anaesthetised patients undergoing elective surgery. First time insertion success rate was 86% and overall insertion success rate was 100%. Mechanical ventilation was successful in all cases. Median (IQR [range]) time to establish an airway was 34 s (26-40 [18,145] s). Median (IQR [range]) pharyngeal seal pressure was 23 cmH2O (19-28 [13,40] cmH2O). There were no important complications. Results are consistent with previous studies of use of the LMA Supreme by airway experts. We conclude that the LMA supreme is suitable for use by airway novices. Further research is needed before it may be recommended for cardiopulmonary resuscitation and emergency airway use. [source] Prediction of respiratory insufficiency in Guillain-Barré syndromeANNALS OF NEUROLOGY, Issue 6 2010Christa Walgaard MD Objective Respiratory insufficiency is a frequent and serious complication of the Guillain-Barré syndrome (GBS). We aimed to develop a simple but accurate model to predict the chance of respiratory insufficiency in the acute stage of the disease based on clinical characteristics available at hospital admission. Methods Mechanical ventilation (MV) in the first week of admission was used as an indicator of acute stage respiratory insufficiency. Prospectively collected data from a derivation cohort of 397 GBS patients were used to identify predictors of MV. A multivariate logistic regression model was validated in a separate cohort of 191 GBS patients. Model performance criteria comprised discrimination (area under receiver operating curve [AUC]) and calibration (graphically). A scoring system for clinical practice was constructed from the regression coefficients of the model in the combined cohorts. Results In the derivation cohort, 22% needed MV in the first week of admission. Days between onset of weakness and admission, Medical Research Council sum score, and presence of facial and/or bulbar weakness were the main predictors of MV. The prognostic model had a good discriminative ability (AUC, 0.84). In the validation cohort, 14% needed MV in the first week of admission, and both calibration and discriminative ability of the model were good (AUC, 0.82). The scoring system ranged from 0 to 7, with corresponding chances of respiratory insufficiency from 1 to 91%. Interpretation This model accurately predicts development of respiratory insufficiency within 1 week in patients with GBS, using clinical characteristics available at admission. After further validation, the model may assist in clinical decision making, for example, on patient transfer to an intensive care unit. ANN NEUROL 2010;67:781,787 [source] A standardized protocol for the treatment of severe pneumonia in kidney transplant recipientsCLINICAL TRANSPLANTATION, Issue 6 2002Pierpaolo Sileri Abstract:, Although the incidence of pneumonia after kidney transplantation is the lowest among all solid organ transplants, it is associated with high mortality rate (40,50%). We evaluated the efficacy of a protocol consisting of bronco-alveolar-lavage (BAL) for early microbiological diagnosis, reduction of the immunosuppressive therapy, and prompt administration of standardized antibiotic regimen in renal transplant recipients with severe pneumonia. Between 6/1989 and 5/1999, 40 kidney transplant recipients developed 46 episodes of severe pneumonia (hypoxia and/or infiltrate on the chest X-ray). According to protocol, in all these cases, a BAL was immediately performed and empirical antibiotic therapy was initiated with erythromycin and trimethoprim-sulfamethoxazole i.v. Furthermore, the immunosuppressive therapy was drastically reduced. Analyses of BAL fluid included cell differential count, cytopathologic examination and cultures for bacteria, fungi and viruses. Within 48 h, the therapy was switched to proper i.v. antibiotics, if necessary, according to the results of sensitivity testing of BAL specimens. The mortality rate was 12.5% (5 of 40). Mechanical ventilation was required in 20 cases (34.5%) and four of the patients that required intubation died. BAL alone established a diagnosis in 67.4% (31 of 46) of the patients. Bacteria were responsible for 61% of the episodes, with fungi responsible for 29% and viruses for 10%. Seven cases of Pneumocystis carinii pneumonia were treated with the prolongation of the initial therapy. We conclude that a combination of early detection of the responsible pathogen by BAL, aggressive reduction of the immunosuppressive therapy and the immediate empirical administration of erythromycin and trimethoprim-sulfamethoxazole is an effective strategy to treat pneumonia kidney transplantation (KTX) recipients. [source] Neurological features in Gaucher's disease during enzyme replacement therapyACTA PAEDIATRICA, Issue 2 2001H Ono This report describes two patients with Gaucher's disease who had unusual clinical symptoms during enzyme replacement therapy. One patient was a female with type 3 Gaucher's disease. She developed a pericardial effusion at 7 y of age, which contained many Gaucher cells despite enzyme replacement therapy. She died from neurological deterioration during enzyme replacement therapy, despite an improvement in her visceral manifestations. The other patient is a male with type 2 Gaucher's disease, who has achieved long-term survival after being supported by mechanical ventilation and enzyme replacement therapy. While on enzyme replacement therapy at the age of 4y, he suffered a generalized cutaneous disease which was clinically diagnosed as ichthyosis. Conclusion: These cases suggest that ordinary enzyme replacement therapy is insufficient for some of the non-neurological manifestations of severe types of Gaucher's disease. [source] Budesonide delivered by dosimetric jet nebulization to preterm very low birthweight infants at high risk for development of chronic lung diseaseACTA PAEDIATRICA, Issue 12 2000B Jónsson We investigated the effect of an aerosolized corticosteroid (budesonide) on the oxygen requirement of infants at high risk for developing chronic lung disease (CLD) in a randomized, double-blind study. The study objective was to attain a 30% decrease in FiO2 levels in the budesonide treatment group after 14 d of therapy. Thirty very low birthweight (VLBW) infants (median (range)) gestational age 26 wk (23,29) and birthweight 805 g (525,1227) were randomized. Inclusion criteria were mechanical ventilation on day 6 of life, or if extubated on nasal continuous positive airway pressure with FiO2± 0.3. The budesonide (PulmicortÔ dose was 500 ,g bid, or placebo. The aerosol was delivered with a dosimetric jet nebulizer, with variable inspiratory time and breath sensitivity. Inhalations were started on day 7 of life. Twenty-seven patients completed the study. A significant lowering of the FiO2 levels at 21 d of life was not detected. Infants who received budesonide were more often extubated during the study period (7/8 vs 2/9) and had a greater relative change from baseline in their oxygenation index (budesonide decreased 26% vs placebo increased 60%). Subsequent use of intravenous dexamethasone or inhaled budesonide in the treatment group was significantly less. All patients required O2 supplementation on day 28 of life. At 36 wk postconceptual age, 61% of infants in the budesonide group needed supplemental O2 as opposed to 79% in the placebo group. No side effects on growth or adrenal function were observed Conclusion: We conclude that inhaled budesonide aerosol via dosimetric jet nebulizer started on day 7 of life for infants at high risk for developing CLD decreases the need for mechanical ventilation similar to intravenous dexamethasone, but without significant side effects. [source] Randomized trial comparing natural and synthetic surfactant: increased infection rate after natural surfactant?ACTA PAEDIATRICA, Issue 5 2000AK Kukkonen The efficacy of a natural porcine surfactant and a synthetic surfactant were compared in a randomized trial. In three neonatal intensive care units, 228 neonates with respiratory distress and a ratio of arterial to alveolar partial pressure of oxygen <0.22 were randomly assigned to receive either Curosurf 100mgkg,1 or Exosurf Neonatal 5 ml kg,1. After Curosurf, the fraction of inspired oxygen was lower from 15min (0.45 ± 0.22 vs 0.70 ± 0.22, p = 0.0001) to 6 h (0.48 ± 0.26 vs 0.64 ± 0.23,p= 0.0001) and the mean airway pressure was lower at 1 h (8.3 3.2 mmH2O vs 9.4 ± 3.1 mmH2O ,= 0.01). Thereafter the respiratory parameters were similar. The duration of mechanical ventilation (median 6 vs 5 d) and the duration of oxygen supplementation (median 5 vs 4 d) were similar for Curosurf and Exosurf After Curosurf, C-reactive protein value over 40 mg r1 occurred in 45% (vs 12%; RR 3.62, 95%CI 2.12-6.17, p = 0.001), leukopenia in 52% (vs 28%; RR 1.85, 95%CI 1.31-2.61, ,= 0.001) and bacteraemia in 11% (vs 4%; RR3.17, 95%CI 1.05-9.52, p < 0.05). We conclude that when given as rescue therapy Curosurf had no advantage compared with Exosurf in addition to the more effective initial response. Curosurf may increase the risk of infection. [source] The Use of B-Type Natriuretic Peptides in the Intensive Care UnitCONGESTIVE HEART FAILURE, Issue 2008Christian Mueller MD B-type natriuretic peptide levels are quantitative markers of cardiac stress and heart failure that summarize the extent of systolic and diastolic left ventricular dysfunction, valvular dysfunction, and right ventricular dysfunction. Initial observational pilot studies have addressed 7 potential indications in the intensive care unit: identification of cardiac dysfunction, diagnosis of hypoxic respiratory failure, risk stratification in severe sepsis and septic shock, evaluation of patients with shock, estimation of invasive measurements, weaning from mechanical ventilation, as well as perioperative and postoperative risk prediction. Although additional studies are required to better define the clinical utility of B-type natriuretic peptide values in the intensive care unit, current data suggest that the diagnosis of hypoxic respiratory failure and timing of extubation seem to be the most promising indications. Congest Heart Fail. 2008;14(4 suppl 1):43,45. ©2008 Le Jacq [source] Mechanical ventilation for respiratory failure in children with severe neurological impairment: is it futile medical treatment?DEVELOPMENTAL MEDICINE & CHILD NEUROLOGY, Issue 5 2010JOSEPHUS PJ VAN GESTEL Aim, To assess outcome for children with severe neurological impairment receiving invasive mechanical ventilation for respiratory failure. Method, Medical charts for all such children treated in our intensive care unit (ICU) between January 2003 and July 2008 were reviewed. Outcomes were compared with those for children with moderate neurological impairment. Results, Twenty-two children with severe neurological impairment were included (nine females, 13 males; median age 7y 10mo; range 4mo,17y). The median duration of mechanical ventilation was 16 days. Six children had an uneventful 1-year survival, the others required reintubation or readmission to the ICU, or died. Eleven children were still alive 1 year after discharge from the ICU. Nine patients died of respiratory failure. None of the children in the severe group died of a heart defect. Eleven children with moderate neurological impairment were included (eight females, three males; median age 1y 1mo, range 4mo,13y). Four children had an uneventful 1-year survival. Eight children were still alive 1 year after discharge from the ICU. Two of the three non-survivors died of their heart defects. Interpretation, Mechanical ventilation for respiratory failure in children with severe neurological impairment is complex and associated with limited survival. However, it cannot be regarded as futile medical treatment. Further studies are urgently needed for the rational guidance of clinical decision-making. [source] Heart rate variability in response to pain stimulus in VLBW infants followed longitudinally during NICU stayDEVELOPMENTAL PSYCHOBIOLOGY, Issue 8 2009Nikhil S. Padhye Abstract The objective of this longitudinal study, conducted in a neonatal intensive care unit, was to characterize the response to pain of high-risk very low birth weight infants (<1,500,g) from 23 to 38 weeks post-menstrual age (PMA) by measuring heart rate variability (HRV). Heart period data were recorded before, during, and after a heel lanced or wrist venipunctured blood draw for routine clinical evaluation. Pain response to the blood draw procedure and age-related changes of HRV in low-frequency and high-frequency bands were modeled with linear mixed-effects models. HRV in both bands decreased during pain, followed by a recovery to near-baseline levels. Venipuncture and mechanical ventilation were factors that attenuated the HRV response to pain. HRV at the baseline increased with post-menstrual age but the growth rate of high-frequency power was reduced in mechanically ventilated infants. There was some evidence that low-frequency HRV response to pain improved with advancing PMA. © 2009 Wiley Periodicals, Inc. Dev Psychobiol 51: 638,649, 2009 [source] Hyperglycaemia and mortality of diabetic patients with candidaemiaDIABETIC MEDICINE, Issue 9 2005M. S. Bader Abstract Aims To determine whether the degree of hyperglycaemia has an impact on in-hospital mortality in diabetic patients with candidaemia. Methods A retrospective cohort study of 87 diabetic patients with candidaemia admitted between June 1995 and June 2003 was carried out at two medical centres. Patients were stratified into two groups: those with moderate hyperglycaemia (7 days post-candidaemia mean blood glucose < 13.9 mmol/l) and those with severe hyperglycaemia (7 days post-candidaemia mean blood glucose , 13.9 mmol/l). A stepwise logistic regression analysis was performed to determine whether the degree of hyperglycaemia was a significant predictor of mortality. Results During the follow-up period from admission till discharge, 34 (39.1%) patients had died. Nine (69.2%) of 13 patients with severe hyperglycaemia have died while 25 (33.8%) of 74 patients with moderate hyperglycaemia have died. Multivariate analysis identified three independent determinants of death; Apache II score , 23 [OR 8.1, 95% CI (2.6, 25.3), P = 0.0003], mean blood glucose levels 7 days post-candidaemia , 13.9 mmol/l [OR 6.8, 95% CI (1.2, 38.2), P = 0.03], and mechanical ventilation [OR 6.5, 95% CI (2.21), P = 0.03]. Conclusion Severe hyperglycaemia is an important marker of increased mortality among hospitalized diabetic patients with candidaemia. [source] Serum concentrations of high-mobility group box chromosomal protein 1 before and after exposure to the surgical stress of thoracic esophagectomy: a predictor of clinical course after surgery?DISEASES OF THE ESOPHAGUS, Issue 1 2006K. Suda SUMMARY., High-mobility group box chromosomal protein 1 (HMGB-1) has recently been shown as an important late mediator of endotoxin shock, intra-abdominal sepsis, and acute lung injury. However, its role in the systemic inflammatory response syndrome after major surgical stress, which may lead to multiple organ dysfunction syndrome, has not been thoroughly investigated. We hypothesized that serum HMGB-1 participates in the pathogenesis of postoperative organ system dysfunction after exposure to major surgical stress. A prospective clinical study was performed to consecutive patients (n = 24) with carcinoma of the thoracic esophagus who underwent transthoracic esophagectomy with three field lymph node resection between 1998 and 2003 at Keio University Hospital, Japan. Serum HMGB-1 concentrations were measured by enzyme-linked immunosorbent assay. Preoperative serum HMGB-1 levels correlated with postoperative duration of SIRS, mechanical ventilation, and intensive care unit stay. Three of the 24 patients had serious postoperative complications: sepsis in two, and acute lung injury in one. Serum HMGB-1 levels in patients without complications increased within the first 24 h postoperatively, remained high during postoperative days 2,3, and then decreased gradually by postoperative day 7. In patients with serious complications, serum HMGB-1 was significantly higher than that found in patients without postoperative complications at every time point except postoperative day 2. Preoperative serum HMGB-1 concentration seems to be an important predictor of the postoperative clinical course. Transthoracic esophagectomy induces an increase in HMGB-1 in serum even in patients without complications. Postoperative serum HMGB-1 concentrations were higher in patients who developed complications, and may be a predictive marker for complications in this setting. [source] Accelerating botulism therapeutic product development in the Department of Defense,DRUG DEVELOPMENT RESEARCH, Issue 4 2009Andrea M. Stahl Abstract Coordinated small-molecule drug discovery research efforts for the treatment of botulism by the public sector, especially the U.S. Department of Defense (DoD) and Department of Health and Human Services (DHHS), began in the 1990s and represent a significant resource investment. Organization of an effective botulism therapeutic drug program, however, presents formidable technical and logistical challenges. Seven distinct BoNT serotypes are known, each representing a different target. Moreover, BoNT exerts its action inside peripheral cholinergic neurons, and some serotypes may persist functionally within nerve cells for weeks or months. Clinical botulism occurs infrequently, and the effectiveness of prolonged mechanical ventilation to treat poisoning further limits experimental drug testing. The efficacy of experimental compounds must be extrapolated from disparate cell- or tissue-based or rodent models. Numerous compounds with moderate efficacy in experimental laboratory assays have been reported, but may not possess the necessary safety, efficacy, and pharmacokinetic profile to support therapeutic development. To mitigate these challenges, we propose product development tools to assist in management of the BoNT portfolio and to clearly define the desired therapeutic product. Establishing a target product profile (TPP) is proposed to guide public sector managers toward critical aspects of the desired therapeutic product. Additional product development tools to assist in shaping research portfolios and to inform decisions regarding lead candidates to pursue are also discussed. Product development tools that facilitate the characterization of the ideal therapeutic product, and assist in the maintenance of a robust portfolio, will ameliorate the inherent financial risk in drug development for treating BoNT intoxication. Drug Dev Res 70:303,326, 2009. Published 2009 Wiley-Liss, Inc. [source] Bradycardia and sinus arrest during percutaneous ethanol injection therapy for hepatocellular carcinomaEUROPEAN JOURNAL OF CLINICAL INVESTIGATION, Issue 3 2004A. Ferlitsch Abstract Background, Percutaneous ethanol injection (PEI) is an established method in the treatment of hepatocellular carcinoma (HCC) and considered a safe procedure, with severe complications occurring rarely. Cardiac arrhythmias have not been reported to date. Aim of the study was to investigate the occurrence of dysrhythmias during PEI. Patients and methods, Twenty-six consecutive patients with inoperable HCC were included. During ultrasound-guided PEI with 95% ethanol, electrocardiogram (ECG) monitoring was performed before starting and continuously during PEI. Results, During PEI a significant reduction in mean heart rate (> 20%) was seen in 15 of 26 (58%) patients. In 11 of 26 patients (42%) occurrence of sinuatrial block (SAB) or atrioventricular block (AVB) was observed after a median time of 9 s (range 4,50) from the start of PEI with a median length of 24 s (range 12,480). Clinical symptoms were seen in two patients, including episodes of unconsciousness, seizure-like symptoms in both and a respiratory arrest during PEI in one patient, requiring mechanical ventilation. In four of 12 patients with repeat interventions, dysrhythmias were reproducible during monthly performed procedures. There was a significant association between the occurrence of SAB or AVB and the amount of instilled alcohol (P = 0·03) and post-PEI serum ethanol levels (P = 0·03). Conclusions, Bradycardia and block formation occur frequently during PEI. These symptoms could be explained by a vasovagal reaction and/or the direct effect of ethanol on the sinus node or the right atrial conduction system. Ethanol dose is an important factor for the occurrence of SAB/AVB. ECG-monitoring seems mandatory during PEI. Prophylactic use of intravenously administered Atropine might be useful. [source] Dysautonomia after severe traumatic brain injuryEUROPEAN JOURNAL OF NEUROLOGY, Issue 9 2010H. T. Hendricks Background:, Dysautonomia after traumatic brain injury (TBI) is characterized by episodes of increased heart rate, respiratory rate, temperature, blood pressure, muscle tone, decorticate or decerebrate posturing, and profuse sweating. This study addresses the incidence of dysautonomia after severe TBI, the clinical variables that are associated with dysautonomia, and the functional outcome of patients with dysautonomia. Methods:, A historic cohort study in patients with severe TBI [Glasgow Coma Scale (GCS) , 8 on admission]. Results:, Seventy-six of 119 patients survived and were eligible for follow-up. The incidence of dysautonomia was 11.8%. Episodes of dysautonomia were prevalent during a mean period of 20.1 days (range 3,68) and were often initiated by discomfort. Patients with dysautonomia showed significant longer periods of coma (24.78 vs. 7.99 days) and mechanical ventilation (22.67 vs. 7.21 days). Dysautonomia was associated with diffuse axonal injury (DAI) [relative risk (RR) 20.83, CI 4.92,83.33] and the development of spasticity (RR 16.94, CI 3.96,71.42). Patients with dysautonomia experienced more secondary complications. They tended to have poorer outcome. Conclusions:, Dysautonomia occurs in approximately 10% of patients surviving severe TBI and is associated with DAI and the development of spasticity at follow-up. The initiation of dysautonomia by discomfort supports the Excitatory: Inhibitory Ratio model as pathophysiological mechanism. [source] Single-stage surgical repair of benign laryngotracheal stenosis in adultsHEAD & NECK: JOURNAL FOR THE SCIENCES & SPECIALTIES OF THE HEAD AND NECK, Issue 2 2004Jolanda van den Boogert PhD Abstract Background. Benign laryngotracheal stenosis causes considerable morbidity. In a retrospective study, we describe the results of our surgical treatment. Methods. Between June 1999 and June 2002, 14 adults with laryngotracheal stenosis were referred to our hospital. Stenosis resulted from mechanical ventilation in 11 patients, from Wegener's granulomatosis in 2 patients, and from strangulation in 1 patient. Eleven patients had a tracheotomy. One patient was found unfit for surgery. Nine patients underwent cricotracheal resection (CTR) with end-to-end anastomosis, and four patients underwent single-stage laryngotracheoplasty (SS-LTP) without stenting. Results. There were no perioperative deaths. Patients were extubated after mean of 3 days (range, 0,10 days; CTR 2.3 days vs SS-LTP 3.5 days, p = .45). There were in-hospital complications in five patients. Mean hospital stay was 19 days (range, 8,53 days; after CTR 24 days vs SS-LTP 9 days, p = .015). With regard to airway patency and voice recovery, 10 patients (77%) had good results, including 1 patient with two readmissions, and 3 (23%) had satisfactory results, including 1 patient with 11 additional nonsurgical interventions. Conclusions . Benign laryngotracheal stenosis in the adult patient can be repaired successfully using a strategy of two single-stage surgical procedures. All patients had good or satisfactory functional results. A multidisciplinary approach was essential to achieve these good results. © 2004 Wiley Periodicals, Inc. Head Neck26: 111,117, 2004 [source] | ||||||||||||||||||||||||||||||||||||||||