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At least 19 recordsLinked to original sources
PubMedDate not supplied

[Effects of oxygen inhalation therapy on blood and phonomechanography in patients with heart disease, lung disease and cardiorespiratory insufficiency].

Arterial PaO2 and some phonomechanographic indices were studied during and after a period of 40-60-100% oxygen breathing in fourteen patients (six with pulmonary insufficiency, four with cardiac disease and four with cardiorespiratory insufficiency). Arterial PaO2 was measured at the beginning, every five minutes during and many times after the ventilation. Myocardial performance was also measured by sistolic time: isovolumetric contraction time, left ventricular expulsive time, preejection pressure, deformation time. The authors discuss the modifications of these indices and the clinical involvement of O2 breathing.

Aged↗
PubMed1986

Breathing pattern during and after maximal exercise in patients with chronic obstructive lung disease, interstitial lung disease, and cardiac disease, and in normal subjects.

Inspiratory muscle fatigue and pulmonary edema are both known to cause rapid shallow breathing. It has been suggested that exercise tolerance in patients with pulmonary disease and cardiac disease may be limited by the development of inspiratory muscle fatigue and pulmonary edema, respectively, at maximal exercise. If these hypotheses are correct, breathing pattern during recovery from maximal exercise in these patients should be rapid and shallow compared with that during exercise. This study was performed to test these hypotheses. Seven patients with chronic obstructive pulmonary disease (COPD), 8 patients with interstitial lung disease (ILD), 7 patients with cardiac disease (CD) (mitral valve disease or left ventricular dysfunction) and 8 normal (NR) subjects each performed maximal incremental exercise on a cycle ergometer. Exercise breathing pattern was compared with that during recovery by calculating the mean difference in tidal volume (at the same levels of minute ventilation) between exercise and recovery for each subject. Recovery breathing pattern was similar to that during exercise for the COPD, ILD, and NR subjects. In contrast, breathing pattern during recovery was rapid and shallow compared with that during exercise for the CD patients; recovery tidal volume was less than that during exercise for the same level of minute ventilation. The fact that rapid shallow breathing does not develop during recovery from maximal exercise in patients with COPD or ILD suggests that inspiratory muscle fatigue does not limit their exercise tolerance. The relative rapid shallow breathing during recovery from maximal exercise in patients with CD is probably due to the development of pulmonary edema at maximal exercise, but further studies are needed to confirm this.(ABSTRACT TRUNCATED AT 250 WORDS)

Adult↗
PubMed1991

Ureaplasma urealyticum demonstrated by open lung biopsy in newborns with chronic lung disease.

Lung biopsy tissue from eight infants with chronic lung disease was evaluated for the presence of Ureaplasma urealyticum. Specimens from four infants grew the organism. Pleural fluid cultures matched lung tissue but tracheal cultures were negative in two babies with positive lung tissue. There were no distinguishing pathologic findings in the four culture-positive infants which could be used to identify them vs. the culture-negative infants. Three culture-positive infants improved clinically after therapy directed at Ureaplasma even though two remained culture-positive. Ureaplasma grows in lung tissue of infants with chronic lung disease, it does not demonstrate any specific standard pathologic findings and tissue cultures do not match endotracheal cultures.

Biopsy↗
PubMed1992

Preexisting lung disease and lung cancer among nonsmoking women.

Preexisting lung disease was examined as a risk factor for lung cancer in a population-based, case-control study of nonsmoking women in Missouri conducted between June 1, 1986, and April 1, 1991. A history of lung disease was reported by approximately 41% of 618 cases and 35% of 1,402 controls (odds ratio (OR) = 1.2; 95% confidence interval (Cl) 1.0-1.5. The risk was more pronounced when next-of-kin interviews were excluded (OR = 1.5). Previous lung disease was significantly related both to adenocarcinoma (OR = 1.4), which accounted for 62% of the cancers, and to all other cell types of lung cancer combined (OR = 1.8). Despite having discontinued smoking for more than 15 years, long-term ex-smokers were at a 2.2-fold risk of lung cancer compared with lifetime nonsmokers. Among lifetime nonsmokers, significant risks were noted for asthma (OR = 2.7) and pneumonia (OR = 1.5). Emphysema (OR = 2.6) and tuberculosis (OR = 2.0) were also significantly related to lung cancer, but only among former smokers. Chronic bronchitis was linked to elevated risks of nonadenocarcinomas only (OR = 2.3). Pleurisy was not reported more frequently by cases than by controls. Approximately 16% of all lung cancers among nonsmoking women could be attributed to previous lung diseases, most notably asthma, pneumonia, emphysema, and tuberculosis.

Adult↗
PubMed1977

A new method for investigating regional lung function in children with localized lung disease.

Lung function studies using 13Nitrogen have been used to determine regional and total lung function in 16 children suspected of having localized lung disease amenable to surgery. This method is simple, requires no active co-operation on the part of the child and gives a radiation dosage of about one-third of that for a bronchogram. The studies provided information about the severity and localization of the disease, and in addition, information about the remaining lung areas.

Asthma↗
PubMedDate not supplied

Action of isoprenaline on the mechanical properties of lungs and airways in healthy people and patients with obstructive lung diseases.

Lung volumes, maximal expiratory flows, pulmonary resistance and static recoil pressure-volume curves were measured before and after inhalation of isoprenaline in four groups of subjects: heqlthy patients with mild and severe chronic bronchitis and asthmatics. The observed changes were qualitatively similar in the four groups. Whereas total lung capacity and dynamic compliance were not influenced, there was an increase in vital capacity (not in healthy subjects and mild bronchitics), in FEV1, in maximal expiratory flows and a decrease in pulmonary resistance. The static recoil pressure-volume relationship was shifted to the left over its ascending part. The effect of isoprenaline tended to be larger in patients. Among the latter, the increase of vital capacity was especially pronounced in the severe bronchitics, whereas the maximal flows increased most in asthmatics. We suggest that the influence of isoprenaline on maximal flows results from a bronchodilation, associated with an increased collapsibility of the central intrathoracic airways, whereas the influence of VC might reflect a delayed onset of small airway closure.

Adult↗
PubMedDate not supplied

The mitochondrial activation of silicate and its role in silicosis, black lung disease and lung cancer.

Silicate substitutes for phosphate in the transitory uncoupling of rat liver mitochondria induced by hydrazine when beta-hydroxy-butyrate is the substrate. Uncoupling is blocked by rutamycin. Just as in the case when phosphate is combined with hydrazine, ATP, ADP, PPi, and Mg++ protect against hydrazine when silicate is combined with hydrazine. A high level of ADP in the absence of added phosphate, but in the presence of silicate, induces a pseudo state three of the mitochondria. Silicate, like sulfate and arsenate which have been reported previously, is activated by the enzymes which mediate oxidative phosphorylation. These results serve to explain a role for silicate in silicosis, black lung disease, and cancer. In addition, since there is suggestive evidence in the literature that lung tissue solubilizes asbestos fibers, these results not only expand the confluence between oxidative phosphorylation and chemical carcinogenesis but are correlated with the synergistic carcinogenicity of asbestos and smoking observed by epidemiologists.

Adenosine Diphosphate↗
PubMed1976

Use of beta-adrenoreceptor blockers in combination with beta-stimulators in patients with obstructive lung disease.

Lung function can be reduced not only by a non-selective beta-blocker but also by a selective beta1-receptor blocker. If both types of drug are without intrinsic sympathomimetic activity, the effect of the non-selective drug is more pronounced than that of a beta1-receptor selective drug under basal conditions. The effect of a beta2-receptor stimulating drug on the bronchi is inhibited by a non-selective drug, but much less by a selective beta1-receptor blocker. A selective beta1-receptor blocker can be used in asthmatics when it is combined with optimal anti-asthmatic therapy, while a non-selective drug is contra-indicated in patients with broncho-obstructive diseases. It is necessary to induce bronchodilatation (e.g. with a beta2-stimulator) in order to test whether or not a beta-blocker can be used in broncho-obstructive disease.

Adrenergic beta-Agonists↗
PubMed1992

The effects of inhaled albuterol and oral theophylline on gastroesophageal reflux in patients with gastroesophageal reflux disease and obstructive lung disease.

Patients with gastroesophageal reflux disease may have pulmonary symptoms due to repeated aspiration of gastric contents or reflex bronchospasm during a reflux event. Oral bronchodilators are known to worsen gastroesophageal reflux and may lead to vicious cycle when gastroesophageal reflux causes bronchospasm. The effect of inhaled bronchodilators on gastroesophageal reflux is unknown. We compared the severity of gastroesophageal reflux in patients with documented gastroesophageal reflux disease and obstructive lung disease while they were taking inhaled albuterol or oral theophylline. Nine patients with gastroesophageal reflux disease had 24-hour esophageal pH studies on two separate days approximately 1 week apart. On one study day, the patients received 0.5 mg of albuterol in 2.5 mL of normal saline vias hand-held nebulizer, four times a day. On the other day, the patients received sustained-release theophylline, 200 mg twice a day, or in a dosage taken previously to achieve a serum theophylline level of 55 to 110 mumol/L. The patients had 40% reduction in the total time the pH was less than 4.0 with albuterol than with theophylline (9.7% vs 16.1%). Seven patients had less gastroesophageal reflux while taking albuterol, and two patients had essentially no change. Patients with gastroesophageal reflux disease, who require bronchodilator therapy for obstructive lung disease, have less reflux with inhaled albuterol.

Administration, Inhalation↗
PubMed1991

Comparison of outcomes of double and single lung transplantation for obstructive lung disease. The Toronto Lung Transplant Group.

Single lung transplantation has recently been applied with success in patients with obstructive lung disease. Such patients were previously managed by bilateral pulmonary transplantation. Between November 1986 and January 1990, 18 patients underwent transplantation for obstructive lung disease in our center. Eleven double lung transplants and seven single lung transplants were performed in patients having a mean age of 43.4 and 44.1 years, respectively. Operative death occurred in two of 11 double lung transplantations and one of seven single lung transplantations. Each patient underwent preoperative and 3-month postoperative pulmonary function tests, arterial blood gas analyses, nuclear lung scans, and 6-minute walk tests. There was no difference in the preoperative values for any of these parameters. Double lung recipients had significantly higher forced expiratory volume in 1 second and forced vital capacity than single lung recipients. However, the ratios of forced expiratory volume in 1 second to vital capacity were not different. Arterial oxygen and carbon dioxide tension were not different between the two procedures. Whereas double lung transplantations caused a slight preponderance of perfusion to the right lung, the transplanted lung in single lung recipients received a mean of 79.5% +/- 12.3% of predicted flow and only 61.6% +/- 5.0% of predicted ventilation. Three-month 6-minute walk distances were markedly improved in both groups, with double lung recipients achieving 573.0 +/- 44.7 m in comparison with the 528.0 +/- 43.0 m achieved by the single lung recipients. Single lung transplantation is a satisfactory option in patients with obstructive lung disease and might offer significant advantages to the older patient population, in which risk of double lung transplantation is high.

Adult↗
PubMedDate not supplied

Pulmonary mechanics in patients with diffuse interstitial lung disease and normal lung volume.

Static expiratory pressure-volume curves obtained in 20 patients with diffuse interstitial lung disease and lung volume within normal ranges (i.e. in patients in an early stage of the disease) showed different patterns of abnormal lung elastic recoil: 1) P-V curves with normal shape but shifted to the right, which suggest an overdistension of a reduced number of functioning alveoli ("lung shrinkage") and 2) flattened P-V curves (i.e. with low static compliance) also shifted to the right, which argue for an abnormal distensibility of most alveoli or a more diffuse spreading of lesions. These patterns suggest a multifactorial genesis of the increased elastic recoil in diffuse interstitial lung disease.

Adult↗
PubMed1991

[Work capacity evaluation in nonspecific lung diseases in a polyclinic section for lung diseases and tuberculosis].

Describing the structure of a chest clinic in a large city requirements for a high level on the field of medical assessing in patients with non-specific lung diseases are formulated. 1. It must be sure, that all patients suffering from lung diseases are referred to a pneumologist. 2. Opportunities for optimal diagnosis must be given (knowledge and experiences of physicians and nurses; medical equipments of a high technical standard). 3. A scientific-based treatment must be guaranteed. Under optimal conditions it is possible to shorten the duration of disablement and to avoid the hospitalization in some cases.

Ambulatory Care↗
PubMed1987

Sleep in restrictive lung disease.

Restrictive lung disease patients exhibit a wide range of breathing and oxygenation abnormalities during sleep. The combination of degree of restriction, whether it is intrapulmonary or extrapulmonary, and confounding factors, such as obesity, age, and sex, will ultimately determine the degree of disturbed nocturnal physiology. The sleep literature is still sparse in most restrictive diseases. For patients with interstitial lung disease, the role of nocturnal oxygen in chronic established fibrosis, and also in acute alveolitis (e.g., farmer's lung, bird fancier's lung, etc.), has not been addressed. As fibrotic lung disease progresses, the degree of nocturnal desaturation and breathing dysrhythmias will progress. Changes in sleep architecture are likely related to the progression of the disease, but this is not known with certainty. Long-term evaluation of sleep and breathing in interstitial lung disease will give further insight into whether or not sleep changes are primary or secondary events. For kyphoscoliosis patients, again, we need more information on sleep as the thoracic deformity changes. In addition, the use of drugs (acetazolomide, medroxyprogesterone, and almitrine) and/or nasal CPAP to treat nocturnal desaturation needs to be assessed in a controlled fashion. In neuromuscular disease, the dynamics of gas exchange and sleep structure need to be defined in a larger group of patients. Factors such as degree of muscle weakness, degree of underlying lung diseases, and medications must be taken into consideration. Nocturnal hypoxemia may cause muscle weakness and fatigue, which in time, could cause more nocturnal hypoventilation and further hypoxemia. Supplemental nocturnal oxygen should be evaluated in this population.

Female↗