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Biomedical subjects

L D Hudson

Publications and source records attributed to L D Hudson.

At least 181 records · Page 10Linked to original sources
PubMed1976

Effect of diazepam on ventilatory responses.

To investigate the effects of diazepam on ventilatroy control, hypoxic and hypercapnic ventilatory responses were studied in 8 normal subjects before and after 10 mg of intramuscular diazepam. There was no significant change in either resting minute ventilation or resting end-tidal CO2 tension, but depression of hypoxic ventilatory response was observed 15 (60% of control) and 30 min (53% of control) after diazepam (p less than 0.05). No significant depression of hypercapnic ventilatory response was noted 70 to 130 min after diazepam. In view of the depression of hypoxic ventilatory response by diazepam in normal subjects, adverse responses along these lines should be considered in patients with impaired ventilatory function, such as chronic airways obstruction, and in those encountering acute hypoxemia.

Adolescent↗
PubMed1976

High-dose ethambutol: its role in intermittent chemotherapy. A six-year study.

The outcome of 81 patients receiving supervised ambulatory treatment with twice-weekly isoniazid and ethambutol is reported. The patients were divided into 2 groups, one of which received its entire outpatient treatment with isoniazid and ethambutol, the other receiving isoniazid and ethambutol after initial treatment with isoniazid and streptomycin. In both groups, there was a 100 per cent favorable response at completion of therapy and no relapes detected among those patients followed after treatment. We compared our results with other studies of intermittent-supervised therapy and concluded that twice-weekly isoniazid and ethambutol given up to 18 months after an adequate phase of daily treatment is a highly effective and well-tolerated regimen.

Adult↗
PubMed1976

Follow-up evaluation of a prevalence study for chronic bronchitis and chronic airway obstruction.

Follow-up of the prevalence study of respiratory symptoms and chronic airway obstruction was performed after a 6- to 7-year interval. One hundred fifteen of 117 subjects (98%) originally labeled "abnormal" (chronic bronchitis or asthma by history, or ratio of 1-sec forced expiratory volume to forced vital capacity less than 60 per cent), and 111 of a random sample of 116 subjects (96%) originally labeled "normal" were traced. Nineteen patients were dead, 14 "abnormal" subjects, and 5 "normal" subjects (P less than 0.01). Eighty-eight of the originally labeled "abnormal" subjects and 91 of the random "normal" sample could be retested by spirometry. Subjects with lower initial ratios of 1-sec forced expiratory volume to forced vital capacity tended to lose more 1-sec forced expiratory volume and forced vital capacity. Early identification of respiratory symptoms and spirometric abnormalities may identify persons at increased risk of death who could benefit from appropriate therapy.

Adult↗
PubMed1976

Hospitalization needs during an outpatient rehabilitation program for severe chronic airway obstruction.

The number of days of hospitalization for respiratory disease following entry into an outpatient pulmonary rehabilitation program was reviewed for 44 patients with chronic airway obstruction whose hospitalization records were available for the year prior to entry into the program. A significant reduction in the number of days of hospitalization occurred in patients for each of the four years following entry into the program, compared to the year prior to therapy.

Airway Obstruction↗
PubMed1976

Miliary tuberculosis and adult respiratory distress syndrome.

Three patients with miliary tuberculosis developed the adult respiratory distress syndrome. In two patients this complication developed despite treatment with antituberculous drugs. The third patient developed the syndrome, but miliary tuberculosis was not suspected. The presence of disseminated intravascular coagulation in all three cases suggests a possible pathophysiologic relation. Miliary tuberculosis should be considered in patients presenting with adult respiratory distress syndrome of unknown cause.

Adult↗
PubMed1976

Significance of arrhythmias in acute respiratory failure.

Arrhythmias are as likely to strike patients with acute respiratory failure as patients with acute myocardial infarction. Both supraventricular and ventricular types were detected in half or more of the patients in two recent studies. Ventricular arrhythmias have a particularly bleak prognosis, since they often deteriorate into ventricular fibrillation or cardiac arrest. The exact causes of these arrhythmias are still a mystery, but metabolic abnormalities associated with respiratory failure are highly suspect. These disturbances can disrupt the transmembrane action potential of cardiac conducting tissue, causing electrophysiologic phenomena known to trigger arrhythmias. Until a specific etiology is confirmed, treatment should focus on identifying and correcting possible metabolic causes. Congestive heart failure--itself a cause of arrhythmias--also should be treated. Cardioversion and antiarrhythmic drugs should be used only in life-threatening situations.

Action Potentials↗