Results 171 to 180 of about 12,857 (207)

Interpretation of the results of methacholine inhalation challenge tests

Journal of Allergy and Clinical Immunology, 1987
Methacholine inhalation challenge studies are conventionally expressed as the provocative cumulative dose of methacholine that causes a 20% fall in FEV1 (PD20). This method is widely used and most suitable for expressing results for challenges in subjects with asthma.
R J, Hopp, S J, Weiss, N M, Nair, A K, Bewtra, R G, Townley   +4 more
openaire   +2 more sources

Methacholine challenge: test-shortening procedures.

Chest, 2002
Validation of test-shortening procedures for the 2-min tidal breathing methacholine challenge method.Retrospective chart review.Tertiary-care university clinical pulmonary function laboratory.One thousand subjects aged 10 to 85 years (mean +/- SD, 44.5 +/- 16.0 years), 44.5% male, referred for methacholine challenge.Two-minute tidal breathing ...
D W, Cockcroft, D D, Marciniuk, T S, Hurst, D J, Cotton, K F, Laframboise, B D, McNab, R P, Skomro   +6 more
openaire   +1 more source

Comparative cutoff points for adenosine monophosphate and methacholine challenge testing

Annals of Allergy, Asthma & Immunology, 2004
Current use of the PC20 (provocation concentration that causes a decrease in forced expiratory volume in 1 second of 20%) cutoff point for bronchial challenge precludes its use in patients with more severe airflow obstruction.To evaluate the efficacy and safety of lower cutoff points for adenosine monophosphate (AMP) and methacholine (MCH) bronchial ...
Tom C, Fardon, Emma J, Fardon, Melissa R, Hodge, Brian J, Lipworth   +3 more
openaire   +2 more sources

Electric impedance tomography discriminates asthmatics during methacholine challenge test

Paediatric asthma and allergy, 2019
Background: Bronchial asthma is not always easily diagnosed in children because of poor compliance performing spirometric manoeuvres. Little is known about the distribution of pulmonary regional ventilation in these patients. Electric Impedance Tomography (EIT) is a technique where the electrical conductivity and impedance of ventilation is inferred ...
Lorenzo Appendini, Anna Folino, Carlo Minero, Gabriela Ferreyra, Carlotta Botto, Carlo De Pieri, Manuela Goia, Elisabetta Bignamini   +7 more
openaire   +1 more source

Truncating the Dose Range for Methacholine Challenge Tests: Three Occupational Studies

Journal of Occupational and Environmental Medicine, 2003
The methacholine challenge test protocol was assessed in the reanalysis of three occupational studies. We evaluated the impact of truncating the range of methacholine on responsiveness, as defined by slope and PC(20). In original analysis, reactivity was similar for apprentices and auto body shop workers, whereas boilermakers were more responsive ...
Ilir, Agalliu, Ellen A, Eisen, Russ, Hauser, Carrie A, Redlich, Meredith H, Stowe, Mark R, Cullen, David H, Wegman, David C, Christiani, Susan M, Kennedy   +8 more
openaire   +2 more sources

Correlates of Positive Methacholine Challenge Tests

A31. REAL WORLD ASTHMA TREATMENT OUTCOMES, BIOMARKER STUDIES, PHENOTYPING, AND SEVERITY ASSESSMENTS, 2022
S. Patrawala, C. Arevalo Rodriguez, R. Kraude, S.N. Georas, S. Khurana   +4 more
openaire   +1 more source

Methacholine Challenge Testing

Chest, 1997
Richard J. Martin, Jack S. Wanger, Charles G. Irvin, Becki Bucher Bartelson, Reuben M. Cherniack   +4 more
openaire   +1 more source

Methacholine Challenge Testing

Chest, 2007
Sam Birnbaum, Timothy J. Barreiro
openaire   +1 more source

Methacholine challenge test: correlation with symptoms and atopy.

Le Journal medical libanais. The Lebanese medical journal, 2004
Methacholine challenge test (MCT) is a diagnostic test to assess airway hyperresponsiveness, one feature of asthma. Our study presents the results of MCT, done in our pulmonary function laboratory, correlated with patients' symptoms and allergic status.
Myrna, Waked, Pascale, Salameh, Rim, Attoue, Nabil, Khoury, Joudy, Bahous   +4 more
openaire   +1 more source

Methacholine Challenge Testing*

Chest, 2004
Catherine Wubbel, Michael J. Asmus, Gary Stevens, Sarah E. Chesrown, Leslie Hendeles   +4 more
openaire   +1 more source