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Query: UMLS:C0032285 (pneumonia)
 54,520 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

We hypothesized that the ventilatory capacity needed to wean from mechanical ventilation (mv) depends on two variables: ventilatory endurance and the efficiency of gas exchange. We also hypothesized that these variables could be assessed from data readily available at the bedside, including tidal volume (VT) on mv and during spontaneous breathing (sb), ventilator peak inspiratory pressure (Ppk), and patient negative inspiratory pressure (NIP). Ventilatory endurance was evaluated using a modified pressure-time index: PTI = TI/Ttot x Pbreath/NIP, where Pbreath = Ppk x VTsb/VTmv. Defining VE40 as the minute ventilation needed to bring PaCO2 to 40 mm Hg, the efficiency of gas exchange was evaluated by calculating VE40/VTsb = (VE x PaCO2)mv/VTsb x 40. Because high levels of inspiratory effort might cause patients to reduce VTsb and thereby compromise CO2 elimination, we devised a weaning index (WI) that combines ventilatory endurance and the efficiency of gas exchange: WI = PTI x (VE40/VTsb). The study population comprised 38 patients with chronic obstructive pulmonary disease, adult respiratory distress syndrome, pneumonia, neuromuscular disease, and miscellaneous other conditions. They had been mechanically ventilated more than 3 days and were considered by clinical criteria to be ready for weaning. Of 46 weaning trials, 19 were successful, 2 were partially successful, and 25 failed. PTI and VE40/VTsb were higher in patients who failed (p less than 0.05), but neither variable alone had sufficient sensitivity or specificity to predict the outcome of weaning trials accurately.(ABSTRACT TRUNCATED AT 250 WORDS)
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PMID:Evaluation of a new weaning index based on ventilatory endurance and the efficiency of gas exchange. 189 91

A case is reported of adult respiratory distress syndrome(ARDS) combined with barotrauma due to positive end-expiratory pressure (PEEP) therapy. The patient was a 32-year-old woman with fulminant hepatitis, type B, who died of ARDS 22 days after the onset of the illness. The autopsy revealed extraordinary heavy lungs (left: 923g, right: 985g) with edema in the peripheral part and marked emphysematous changes in the central part near the hili. Histologically, scattered foci of intra-alveolar organization and interstitial fibrosis with hemorrhage were observed, which might have been the result of the proceeding pneumonia. The emphysematous lesion seen in this case was peculiar and not like any type of of ordinary pulmonary emphysema. Judging from the strange, sharply demarcated emphysematous lesion with marked destruction of alveolar structure, and the good preservation of the alveolar structure in the edematous lesion, the emphysematous lesion might be barotrauma which was induced by PEEP therapy on top of pneumonia.
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PMID:[An autopsy case of adult respiratory distress syndrome (ARDS) with peculiar histopathological features modified by a positive end-expiratory pressure (PEEP) therapy]. 189 64

Most patients with adult respiratory distress syndrome (ARDS) survive the initial insult which caused respiratory failure only to succumb later to sepsis caused by nosocomial pneumonia or to pulmonary fibrosis. Clinical criteria and analysis of the tracheal aspirate are notoriously inadequate for establishing a diagnosis of ventilator-associated pneumonia. We implemented a comprehensive diagnostic protocol to determine the cause of sepsis in ARDS patients who had been ventilated for more than three days and who had no bronchoscopic evidence of pneumonia. Nine patients with late ARDS who had fever (89 percent), leukocytosis (89 percent), a new localized infiltrate (78 percent), purulent tracheal secretions (89 percent), low systemic vascular resistance (50 percent), and marked uptake of gallium in the lungs (100 percent) had no source of infection identified. Open-lung biopsy specimens from seven patients showed the fibroproliferative phase of diffuse alveolar damage and confirmed absence of pneumonia. Treatment with prolonged high doses of corticosteroids was associated with a marked and rapid improvement in lung injury score (p less than 0.003 at five days). Our findings indicate that the fibroproliferative process occurring in the lungs of patients with late ARDS gives rise to clinical manifestations identical to those of pneumonia and is potentially responsive to steroid treatment.
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PMID:Fibroproliferative phase of ARDS. Clinical findings and effects of corticosteroids. 191

Twenty-five pediatric orthotopic liver transplantations (OLTs) performed in 22 patients at Sainte-Justine Hospital were reviewed for infections complications. One patient died within 12 hours posttransplantation and is excluded. The patients had an average age of 6.1 years (range, 1.25 to 19 years) and an average weight of 20.4 kg (range, 11 to 55 kg). Two patients (9%) were cytomegalovirus (CMV) seropositive and 9 of 19 patients (48%) were Epstein-Barr virus (EBV) seropositive preoperatively. Five of the donors (20%) were CMV seropositive. The most common indications for OLT were biliary atresia (8) and tyrosinemia (7). There were 4 deaths, for an overall mortality rate of 19%. In 3 patients, deaths were related to infection (CMV hepatitis and duodenitis with aortoduodenal fistula, adult respiratory distress syndrome [ARDS] with Streptococcus viridans pneumonia, Escherichia coli cholangitis with progressive hepatic failure). Fifteen patients (72%) had 41 major infections, most of them bacterial, during the first month posttransplantation. These include pneumonia (25%), line sepsis (17%), cholangitis (14%), and tracheitis (14%). There was only one major viral infection, a CMV hepatitis that occurred in the first month posttransplantation. Three patients had fungal infections (8%) associated with hepatic artery thrombosis and recurrent cholangitis. All three patients required retransplantation. There was only one protozoal infection (Pneumocystis carinii pneumonia) causing life-threatening respiratory failure, from which patient recovered without sequelae. Infection still remains a serious complication of OLT. Bacterial infection is common and is usually associated with technical complications. The low rate of CMV infection is related to low incidence of CMV in the donor pool and the minimal use of strong immunosuppressants.
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PMID:Infectious complications of pediatric liver transplantation. 191 82

2710 patients were admitted during 1988 in 14 ICU of a crowded urban area. We determined OMEGA score at the end of the ICU stay. OMEGA scores the intensity of the treatment and depicts the utilisation of resources giving rise to the variable costs. 2085 patients intensively treated resulted in a higher mean OMEGA score than 625 patients only monitored, the length of ICU stay over 8th day increases the allocation of resources. This was conditioned also by the diagnosis in both groups of patients being liver transplant (OLTX) and chronic obstructive lung diseases (COLD), the most resources-consuming intensive patients and cardiovascular (CARD), and drug intoxication (TS), the least ones. The efficiency of the use of resources (i.e. use in survivors) in ICU treatment was 100% in monitored patients and ranges from 47.3% to 90.9% in intensively treated ones: medical unspecified (Mm), COLD, strokes, surgical unscheduled, cardiac arrest, OLTX, pneumonia and ARDS, pulmonary embolism, surgical scheduled, trauma, neurological diseases, TS. Intensive patients could be divided in a group with a good utilization (26.5%) of employed resources: TS, PE, CARD, SS, TR, PNM, NRL, OLTX) in a group with a mean utilisation (50-65%: CCA, strokes, SU) and finally in a group with a weak utilisation of resources (Mm and COLD). We computed also the mean loss of resources for each diagnosis that ranges from COLD (76.1 OMEGA points) to OLTX, strokes, Mm, SU, PNM, CCA, NRL, TR, CARD, SS, PE, and TS (10.2 points). The implications of these results and the possibilities of improving the utilisation of resources in ICU are discussed.
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PMID:[Efficiency of use of resources in intensive care units in an urban area]. 192 56

Between October 1982 and July 1988, 85 patients underwent orthotopic heart transplantation at Methodist Hospital of Indiana. Excluding perioperative deaths, survival rates at six months, one year, two years and three years were 94%, 80%, 74% and 61%, respectively. However, eight patients (9.4%) died within one week of the transplantation. Causes of death included acute failure of the right side of the heart in four patients; compression of the proximal portions of the coronary arteries in one patient; hyperacute rejection in one patient; acute pneumonia and the adult respiratory distress syndrome in one patient; and sudden death of unknown etiology in one patient. The varied causes of death in this group of patients made it inaccurate to assume a particular cause of death for an individual patient, based on the length of the postoperative period alone. We reviewed these eight deaths in detail to better understand and, therefore, reduce the risk of early postoperative death in future patients.
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PMID:Death occurring within one week of cardiac transplantation: findings in eight patients. 194 Feb 91

The Wisconsin Division of Health (DOH) began surveillance for severe illnesses associated with group A beta-hemolytic streptococcus (GABS) infections in late 1989 to describe the current epidemiologic features and clinical spectrum of these infections in the state. Severe illness was defined by the isolation of GABS from the blood or by the development of one or more of the following in a patient infected with GABS: shock, extensive tissue injury, desquamating rash, disseminated intravascular coagulation, renal failure, adult respiratory distress syndrome, or death. Case reports involving 28 patients with severe GABS-related illnesses with onset from November 1989 through October 1990 were received by the DOH. The majority of the case-patients had sepsis (57%), cellulitis (50%) or both. Nine (32%) cases were fatal. Those who died were older than those who survived (median age 74 years v 43 years, p = 0.002) and were more likely to have clinical diagnoses that included pneumonia (relative risk [RR] 3.0, 95% confidence interval [CI] 1.2, 7.3) or necrotizing fasciitis/myositis (RR 3.7, 95% CI 1.5, 9.0). The median interval from illness onset to hospitalization was similar for fatal cases (1 day) and non-fatal cases (2 days), suggesting that early intervention after the appearance of clinical illness may not improve the outcome.
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PMID:Severe illness associated with group A-hemolytic streptococcal infections. 194 73

Adult respiratory distress syndrome (ARDS), or noncardiac pulmonary edema, is a form of acute hypoxemic respiratory failure. The goals of treatment for patients with ARDS are to provide supportive therapy, to reverse the underlying etiology or pathology, and to prevent subsequent complications. Supportive therapy consists of supplemental oxygen, positive end-expiratory pressure, and, often, mechanical ventilation. The reversal of the underlying pathology varies according to the etiologic origin of ARDS. Complications from ARDS include stress ulcers, which occur when gastric aggressive and defensive functions become unbalanced. Antacids and cytoprotective agents are used for stress ulcer prophylaxis, but histamine H2-receptor antagonists are now regarded as the standard of care. Because all the marketed H2-receptor antagonists are efficacious, choice of the agent is based on the adverse effect profile and drug interactions. No definitive data currently exist linking stress ulcer prophylaxis regimens that raise intragastric pH to a significant risk for nosocomial pneumonia.
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PMID:Pathophysiology, monitoring, and management of the ventilator-dependent patient: considerations for drug therapy, emphasis on stress ulcer prophylaxis. 198 Jan 84

Between 6/88 and 8/89 61 critically ill patients (sepsis, ARDS, pneumonia, multiple trauma, etc.) underwent elective percutaneous endoscopic tracheostomy (PET). Following dilation up to 36 Fr. a number 6-10 tracheostomy tube was introduced. The patients were ventilated 17 (2-68 days) before and 28 (4-160) days after PET. One patient died from cardiac arrest, and in 4 patients, because of tube obstruction or cuff defect, reintubation was necessary. Additionally 2 significant infections and a minor bleeding and a emphysema occurred. Elective percutaneous tracheostomy performed in the ICU seems to be a simple and cost-effective procedure.
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PMID:[Percutaneous endoscopic tracheostomy]. 198 39

We report a retrospective study of 39 homeless men hospitalized for acute pneumonia from April 1988 to March 1989. All of them had recently stayed in one of two shelters. A Streptococcus pneumoniae serotype 1, resistant to cotrimoxazole, was isolated in 29 patients (74 percent). Blood cultures were positive in 24 (61 percent). The patients were relatively young; none was over 70 years old. Thirty-five (90 percent) were heavy smokers; 32 (82 percent) were alcoholics. The radiologic pattern was atypical in 14 cases (36 percent). The only fatal case was linked to the adult respiratory distress syndrome. It is likely that the rate of outbreaks of pneumococcal pneumonia is underestimated. The homeless are at high risk for pneumococcal pneumonia. In addition, the closeness existing in shelters favors the occurrence of outbreaks. Consequently, we suggest that shelter residents would benefit from pneumococcal vaccination.
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PMID:An outbreak of pneumococcal pneumonia in two men's shelters. 198 54


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