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Query: UMLS:C0034065 (pulmonary embolism)
 14,979 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

This article reviews the contribution made by nuclear imaging to the assessment, diagnosis and monitoring of patients with respiratory disease. It focuses on several specific areas including the diagnosis of pulmonary embolism, the investigation of intrapulmonary infection and neoplasm and the role of positron emission tomography (PET) scanning.
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PMID:Pulmonary nuclear medicine. 161 97

In chronic obstructive pulmonary disease (COPD) patients, there is a difference between PaCO2 and end-tidal partial pressure of CO2 (PetCO2). This gradient P(a-et)CO2 is due to ventilation/perfusion mismatching and deadspace, and is usually abolished by forced and prolonged expiration. We hypothesized that this gradient might not be canceled by forced expiration in the case of acute respiratory failure (ARF) related to pulmonary embolism (PE). Forty-four adult COPD patients were prospectively entered into this study; they were suspected of having ARF related to PE on the basis of clinical and biological data on admission. Maximum expired partial pressure of CO2 (PemCO2) was measured in mechanically ventilated and sedated patients by an interrupt of mechanical support. CO2 concentration was recorded during the following prolonged and passive expiration. The test was considered valid if an expiratory plateau was obtained. PemCO2 was measured in triplicate. Simultaneously, PaCO2 was measured and the ratio, R = [( 1-PemCO2]/PaCO2) x 100, was calculated. Pulmonary angiography was performed on the same day for all patients. Results showed that 17 patients had PE (PE+) and 17 had no PE (PE-). The two groups were comparable regarding mean age, severity of underlying chronic respiratory disease, PaCO2, PaO2, and hemodynamic data on admission. P(a-em)CO2 and R were significantly different in PE+ and PE- patients at 12 +/- 6.9 torr compared to 1 +/- 2.4 torr and at 28 +/- 14.8% compared to 2 +/- 6.2% (p less than .001), respectively. The positive predictive value of the test was 74%, but the negative predictive value 100% and the specificity was 65%, but sensitivity was 100%.(ABSTRACT TRUNCATED AT 250 WORDS)
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PMID:Use of capnography in diagnosis of pulmonary embolism during acute respiratory failure of chronic obstructive pulmonary disease. 190 Feb 26

This study is an analysis of the reasons for hospitalisation for respiratory diseases in 1985 in the eleven departments of pneumology (SP) and departments of Internal Medicine (SMI) in the public hospitals in Paris. As well as epidemiological data systematically gathered on the discharge of the patients the number of stays for respiratory diseases, the mean duration of stay (DMS), sex, age and place of residence of the patients were studied. 59 diagnostic codes were considered as covering the overall pattern of respiratory pathology (OMS) classification at 3 levels 9th revision). Amongst those 24 were regrouped into 7 pathological groups considered as characteristic of the discipline of pneumology: asthma, chronic airflow obstruction (BPCO), malignant tumours of the respiratory tract, pulmonary embolism, respiratory infections, sarcoidosis and tuberculosis. There were 30,877 inpatient stays for respiratory disease identified, representing 6.6% of all hospitalisations in the medical service of the public hospitals. 41.1% of stays were in SP and 24% in SMI. 78% of the stays in SP were for respiratory diseases against 10-15% in SMI. In SP asthma represented an average of 11% of all hospitalisations for respiratory disease, BPCO was 13%, cancer 35% and pulmonary embolism 4%, sarcoidosis 2%, respiratory infections 8% and tuberculosis 8%; great variation were noted according to the different units which enabled a hospital profile to be identified and which gave the general orientation of a particular service. In SMI this profile was different: there was a smaller percentage of cancer cases and a higher level of infectious disease. The mean stay was shorter in SP than in SMI (10.4 v 13.8 days) for respiratory cases overall and whatever pathology that was studied.(ABSTRACT TRUNCATED AT 250 WORDS)
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PMID:[Hospitalizations for diseases of the respiratory system at public assistance hospitals in Paris in 1985]. 260 16

Pulmonary emboli, even small, cause irreparable lung damage. Recurrent pulmonary emboli further increase the amount of non functional lung tissue and may result in incapacitating respiratory disease or death. It is therefore mandatory that the disease be correctly diagnosed and adequately treated. As prevention is better than cure, every patient presenting with clinical signs of deep venous thrombosis (DVT) should be correctly explored. The site and size of thrombosis must be visualized preferably with contrast venography with imaging of the veins of the limbs, iliac veins and vena cava. Risk factors such as obesity, immobilization etc. must be taken into account. Underlying disease such as heart disease and venous insufficiency must be treated. Malignancy must be looked for as in a recent series of patients with primary DVT which were studied, 15% presented with an up till then unknown malignant disease. In patients presenting with recurrent DVT this percentage rose to 20%. When a patient presents with DVT of the femoro-iliac vena cava axis, aggressive treatment must be adopted. Fibrinolysis or if this is contra-indicated, thrombectomy will be used. A vena cava filter may be necessary and longterm anticoagulation is mandatory. The same rationale is applicable in cases of pulmonary embolus whether it is a primary event or a recurrence.
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PMID:Recurrent pulmonary embolism: importance, diagnosis, management and prevention. 352 Nov 67

Respiratory diseases are the most heavy complications that we can meat in self-poisoning persons. Authors report 15 cases of respiratory complications appeared in 824 self-poisoning cases by drugs. Different factors involved in respiratory diseases origin are analysed but only one appears to be significant: the time between poisoning and admission in intensive care unit. The encountered complications are: acute respiratory distress syndrome, Mendelson syndrome, heavy pulmonary infections, pulmonary embolism. Authors argue about the means of prevention. This seems the fundamental aspect, alone capable to decrease the incidence of very heavy complications responsible of a height mortality range (33%).
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PMID:[Severe respiratory complications in acute voluntary drug poisoning. Apropos of 15 cases in 824 poisoning cases]. 668 85

An experience of surgical non-thoracic emergencies in patients admitted for chronic lung disease is herein presented. Fifty-four patients out of 10457 admitted in the four Departments of Pneumology of the Binaghi Hospital (Cagliari) between 1-1-1985 and 31-3-1993, were referred to our Department of General Surgery due to non-thoracic surgical emergencies. There was a considerable delay in the referral (only 25% of patients within 12 hours from the onset of symptoms): indeed predominant respiratory symptoms, hypoxia and hypercapnia made these patients no responsive to symptoms of surgical emergency. Surgical emergencies in causal correlation with respiratory disease (intestinal occlusion due to abdominal metastases of lung carcinoma, complicated peptic ulcer) had the worst prognosis (mortality: 52.9%). Those in chance connection, such as acute limb ischemia and preexisting abdominal disease, had a less adverse outcome. Mortality, however, was 37.5%: this datum outlines the role of chronic lung disease in defining operative risk. The authors call attention to three groups of observed patients: 1) three patients were operated on for intestinal occlusion due to unrecognized abdominal neoplasia, that showed itself in the course of hospitalization in the Department of Pneumology for lung metastases; 2) in 3 cases symptoms and signs of acute abdomen were observed without abdominal disease. The cause of acute pseudoabdomen was diaphragmatic pleural or basal pulmonary inflammation; 3) the eight patients with pulmonary embolism were all admitted in the Department of Pneumology with a wrong diagnosis of bronchopneumonia.
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PMID:[Extrathoracic surgical emergencies in hospitalized patients with bronchopulmonary diseases. Analysis of the operative risk]. 780 66

Pulmonary arterial hypertension (PAHT) is defined by an increase in mean pulmonary artery pressure above 20 mmHg. Its diagnosis is often easy by cardiac echo-Doppler. Hemodynamic investigation is required in non-echogenic patients or in order to define the type of PAHT: pre- or post-capillary. It is important to determine, on the basis of non-invasive clinical and paraclinical (echocardiography) studies, those patients in whom catheterisation is indicated. PAHT may be due to chronic respiratory disease, left heart disorders, congenital heart disease or follow pulmonary embolism. It is sometimes apparently primary. The prognosis of PAHT depends upon its etiology: when PAHT is secondary to heart disease, it reflects worsening of the causative cardiac problem, which must be corrected. PAHT is a prognostic factor in chronic obstructive lung disease. The course is particularly grave in primary PAHT.
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PMID:[Diagnosis, course and prognosis of pulmonary arterial hypertension]. 782 53

The diagnostic value of transthoracic echocardiography in acute pulmonary embolism is not well established. Although many parameters are abnormal, the thresholds used vary according to the authors, limiting the contribution of the investigation to the diagnosis. In a prospective study of 70 patients with suspected acute pulmonary embolism without previous cardio-respiratory disease, the authors tried to determine the diagnostic thresholds using discriminating linear analysis and ROC curves. Parameters easily recorded in an emergency were analysed: end diastolic ventricular dimensions, ratio of these diameters and maximal velocity of tricuspid regurgitant flow. Thirty-one patients had pulmonary embolism quantified by the Miller index (average: 16 +/- 7, range 2 to 28). Measurements of left ventricular dimension were disappointing (sensitivity: 0.52, specificity: 0.73 for a threshold value of 45 mm). The right ventricular dimension was a better predictive parameter (sensitivity: 0.70, specificity: 0.86 for a threshold value of 25 mm). However, the ratio of right to left ventricular dimension had a better diagnostic value (sensitivity: 0.85, specificity: 0.78 for a threshold value of 0.5). The best diagnostic parameter was the maximal velocity of tricuspid regurgitation (sensitivity: 0.93, specificity: 0.82 for a threshold value of 2.5 m/s). The authors conclude that the maximal velocity of tricuspid regurgitation with a threshold of 2.5 m/s and the ratio of the ventricular dimensions with a threshold value of 0.5 are valuable diagnostic indicators for acute pulmonary embolism.
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PMID:[Transthoracic echocardiography and diagnosis of acute pulmonary embolism. Change in the diagnostic valve with respect to thresholds of classification]. 923 63

Our objective was to evaluate the impact of multislice CT (MSCT) on image quality and diagnostic value of spiral CT angiograms. Over an 8-month period (January 2000 to August 2000), 134 consecutive patients, including 55 patients with underlying lung disease, underwent MSCT (group 1). Image quality and diagnostic results of CT angiograms were compared with those obtained in 125 consecutive patients, including 58 patients with underlying lung disease, evaluated with thin-collimation single slice CT (SSCT; group 2) over a similar period of time (January 1999 to August 1999). A 3-month clinical follow-up was systematically obtained in all patients who were not anticoagulated in the two groups. For a significantly longer mean z-axis coverage, the mean duration of data acquisition was significantly shorter with MSCT. The frequency of examinations devoid of motion artifacts was significantly higher in group 1 than in group 2. In the absence of significant difference in the quality of vascular enhancement, mainly coded as good or excellent, the proportion of examinations interpretable down to the subsegmental arteries was higher in group 1 (57.5%) than in group 2 (13%) ( p<0.0001). The benefits of MSCT were more marked for patients with underlying respiratory disease and did not lead to a higher detection rate of peripheral pulmonary embolism. The negative predictive values of single-slice and multislice CT were 100 and 99%, respectively. Improvement in image quality on MSCT scans accounts for the improved diagnostic accuracy of CT angiography, in particular for patients with impaired respiratory function.
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PMID:CT angiography of pulmonary embolism in patients with underlying respiratory disease: impact of multislice CT on image quality and negative predictive value. 1213 15

A study of 165 maternal deaths at the University of Benin Teaching Hospital, Benin City over a 13-year period (from April 1, 1973 to December 31, 1985) is presented. All patients' case files were recovered from the central records library and each case file was carefully analyzed. With a total delivery of 29,324, the maternal mortality rate, inclusive of death from abortion, was 563/100,000 deliveries. There was a general increase in maternal mortality rate with age and this became alarming from 35 years. There was an equally high mortality rate among teenagers, mainly accounted for by illegally induced abortion. Indeed, abortion accounted for 72% of teenage mortality. A statistically significant association between maternal deaths and parity (p, 0.001) was observed. The most important causes of death were hemorrhage with a total of 26 out of 42 deaths, sepsis, and abortion. Other important causes were hypertensive disorders such as eclampsia, liver and respiratory disease, anemia, trophoblastic diseases, caesarean sections, and acute renal failure. Additional causes of maternal deaths include tetanus, sickle-cell disease, anesthetic death, drug reactions, pulmonary embolism, acute pyogenic meningitis, typhoid disease, urinary bladder tumor, acute lymphoblastic leukemia, and carcinoma of the breast thyroid. Factors identified with these deaths included such health services factors as deficient medical treatment of obstetric complications, lack of adequate personnel at primary and secondary health care levels, lack of access to maternal health services, and consequently, lack of prenatal care. Extreme reproductive age, grandmultiparity, and unwanted pregnancies, especially among teenagers, also contributed to maternal deaths. Overhaul of the maternal health care services at national level to include organization of such programs as provision of adequate blood transfusion facilities, prompt treatment of infections, early referrals of patients at risk to secondary and tertiary health centers, intensified family planning programs, and liberalization of abortion laws are recommended in order to reduce the unacceptably high maternal mortality.
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PMID:Maternal mortality at the University of Benin Teaching Hospital Benin City, Nigeria. 1217 71


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