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The role of unilateral vagotomy on reflex bronchoconstriction

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Abstract

Unilateral application of histamine in one segmental bronchus potentiated the airway resistance increase caused by ACH challenge of the bronchial tree. Unilateral or contralateral blockade of the N. vagus reduces the severity of the reaction by about 70% of the values before the blockade.

The arterial blood gases were not influenced by the unilateral blockade of the N. vagus. The decrease of the arterial oxygen pressure following the ACH induced bronchoconstriction was not changed by the unilateral vagotomy.

The breathing patterns change by unilateral vagus blockade: Tidal volume increases by about 50% and the breathing rate decreases by about 30%. The heart rates were remained unchanged.

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Islam, M.S., Zimmermann, I. & Ulmer, W.T. The role of unilateral vagotomy on reflex bronchoconstriction. Pneumonologie 152, 281–289 (1975). https://doi.org/10.1007/BF02094942

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