Resp Care
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Review Historical Article
Surgical options for patients with COPD: sorting out the choices.
Surgical procedures designed to improve pulmonary function and quality of life of patients with advanced emphysema have been attempted for more than a century. Of the many attempted procedures, only giant bullectomy, lung transplantation, and lung-volume-reduction surgery have withstood the test of time and are currently being practiced. This article reviews each of these procedures and also develops a rational approach to selecting appropriate candidates for these 3 interventions.
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Comparative Study Clinical Trial
Evaluation of a new method for measurement of minute ventilation recovery time.
To determine if the measurement of minute ventilation recovery time (V (E)RT), a recently proposed predictor of extubation outcome, can be reproduced using a more practical, simpler method. ⋯ V (E)RT can be determined using a simpler method for measuring both baseline V (E) and the recovery threshold. These methodological modifications may increase the feasibility of measuring V (E)RT, while reproducing the results obtained by the original method.
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Inhaled aerosol drugs commonly used by patients with chronic obstructive pulmonary disease include short-acting and long-acting bronchodilators, as well as corticosteroids. These agents are available in a variety of inhaler devices, which include metered-dose inhalers (MDI), breath-actuated MDIs, nebulizers, and, currently, 5 different models of dry powder inhaler (DPI). There is evidence to suggest that multiple inhaler types cause confusion among patients and increase errors in patient use. ⋯ Important features identified by patients for an ideal inhaler are ease of use during an attack, dose counter, and general ease of use and learning. A breath-actuated-pMDI, such as the Autohaler, ranked at the top of inhaler preference in a study of 100 patients with airflow obstruction, compared to DPIs and MDIs. Short of a universal simple inhaler, patient and caregiver education remains the best solution to correct patient errors in use.
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Pressurized metered-dose inhalers with valved holding chambers and masks are commonly used for aerosol delivery in children. Drug delivery can decrease when the dead-space volume (DSV) of the valved holding chamber is increased, but there are no published data evaluating force-dependent DSV among different masks. ⋯ Rigid masks with large DSV might not be not suitable for use in children, especially if discomfort from the stiff mask makes its use less acceptable to the child.