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Precision Induction and Distinction of Coughing and Sneezing Reflexes in Mice

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Capsaicin provocation using two different inhalation devices.

Ewa Ternesten-Hasséus¹, Christel Larsson, Mats Bende

¹Asthma and Allergy Research Group, Department of Respiratory Medicine and Allergology, The Sahlgrenska Academy at Göteborg University, Sahlgrenska University Hospital, S-413 45 Göteborg, Sweden. ewa.ternesten@lungall.gu.se

Respiratory Medicine

|August 16, 2008

Summary

The capsaicin inhalation test for sensory hyperreactivity (SHR) was successfully transferred from the outdated Pari Boy to the Maxin MA3 device. This new method demonstrates good repeatability and agreement, ensuring reliable diagnosis of chemically induced airway symptoms.

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Area of Science:

Respiratory Medicine
Clinical Physiology
Toxicology

Background:

Sensory hyperreactivity (SHR) is a proposed mechanism for chemically induced airway symptoms.
The capsaicin inhalation test is used to diagnose SHR.
Previous studies utilized the outdated Pari Boy device for capsaicin inhalation.

Purpose of the Study:

To validate the transfer of the capsaicin inhalation test from the Pari Boy to the Maxin MA3 device.
To assess the repeatability and agreement of the Maxin MA3 for diagnosing SHR.

Main Methods:

A randomized protocol involving 21 patients with SHR and 44 controls.
Participants underwent capsaicin and saline inhalation using both Pari Boy and Maxin MA3 devices.
Analysis of cough responses and evaluation of device agreement and Maxin MA3 repeatability.

Main Results:

The Maxin MA3 device demonstrated good repeatability for capsaicin inhalation.
Agreement between the Pari Boy and Maxin MA3 devices was found to be good.
Adjusted capsaicin concentrations were used for the Maxin MA3, yielding comparable results.

Conclusions:

The Maxin MA3 is a suitable replacement for the Pari Boy device for capsaicin inhalation testing.
This validated method allows for continued reliable diagnosis of sensory hyperreactivity.
The findings support the use of the Maxin MA3 in clinical settings for assessing airway hyperresponsiveness.