Ventilation disorders by impulse oscillometry in pulmonary tuberculosis patients in early post-operative period

Abstract

In the early postoperative period after lung resections the ventilation capacity is limited not only by a decrease in lung volumes, but also by a weakening of the respiratory muscles, and central inspiratory activity changes. So assessment of the pulmonary function is extremely important. Spirometry is contraindicated in the early postoperative period. Impulse oscillometry (IO) does not cause technical difficulties and negative attitude of patients.

Aim: identifying IO parameters changes and possible causes of ventilation worsening in pulmonary tuberculosis (PT) patients in the early post-operative period.

Materials and methods: 78 pulmonary tuberculosis patients were examined after surgical treatment: 23 segmentectomy (SE), 31 lobectomy (LE), 24 pneumonectomy (PE). IO was performed in pre-operative and in 7-10 post-operative days.

Results: Characteristics of ventilation worsening by IO in PT patients in the postoperative period (table, n(%)).

The ventilation disorders according to the IO data was associated with bronchial stenosis before surgery according to fibrobronchoscopy (χ2 = 5.42, p=0.02), COPD (χ2 = 4.54, p=0.03), and bronchospasm (χ2 = 15.56, p=0.0001).

Conclusion: in the early postoperative period the ventilation worsening was detected in 39.7% PT patients. It was associated with bronchial stenosis, COPD, and bronchospasm.