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Ergospirometry with concurrent fibre optic laryngoscopy: a randomised crossover study.

Kiran Kafila Mirza1, Emil Schwarz Walsted1, Vibeke Backer1

  • 1Respiratory Research Unit, Department of Respiratory Medicine, University Hospital Bispebjerg, Copenhagen, Denmark.

European Clinical Respiratory Journal
|December 5, 2017
PubMed
Summary
This summary is machine-generated.

A single test combining maximal oxygen uptake (VO2max) and exercise-induced laryngeal obstruction (EILO) assessment is feasible. This combined test provides comparable results to separate tests, simplifying diagnosis for patients with EILO.

Keywords:
EILOExercise-induced laryngeal obstructionexercise continuous laryngoscopy during exercisemaximum oxygen uptakepeak oxygen uptake

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Area of Science:

  • Sports Medicine
  • Respiratory Medicine
  • Diagnostic Technology

Background:

  • Exercise-induced laryngeal obstruction (EILO) diagnosis requires multiple, exhaustive tests.
  • Patients with EILO experience exercise-induced dyspnea.
  • Current diagnostic protocols can be burdensome for patients.

Purpose of the Study:

  • To assess the feasibility of a single test for diagnosing maximal oxygen uptake (VO2max) and EILO.
  • To compare diagnostic measurements obtained from a combined test versus separate standard tests.
  • To evaluate patient tolerance and comparability of results from the integrated approach.

Main Methods:

  • 11 inactive patients (18-43 years) with moderate/severe EILO underwent randomized VO2max tests.
  • Tests included ergospirometry with and without continuous laryngoscopy (CLE).
  • VO2max and EILO scores (supraglottic and glottic) were compared between testing methods.

Main Results:

  • No significant difference in VO2max was found between tests with and without simultaneous laryngoscopy.
  • Supraglottic EILO scores showed substantial agreement between treadmill and ergometer CLE tests (κ=0.71).
  • Glottic EILO scores showed moderate agreement between test types (κ=0.38).

Conclusions:

  • Ergospirometry with laryngoscopy is a feasible and well-tolerated method for assessing VO2max in inactive individuals.
  • This integrated approach yields comparable VO2max measurements to standard bike ergospirometry.
  • Supraglottic EILO measurements using this method are comparable to standard treadmill CLE tests.