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Table 2 The number of cells in the BAL fluid before and after ventilation with CMV or HFO

From: High frequency oscillatory ventilation attenuates the activation of alveolar macrophages and neutrophils in lung injury

 

CMV

HFO

First BAL*

  

Total cell count

(7.8 ± 1.2) × 106

(8.1 ± 1.3) × 106

Last BAL†

  

Total cell count

(47.0 ± 8.8) × 105

(13.6 ± 3.5) × 105 ‡

Neutrophils

(19.7 ± 5.5) × 105

(1.6 ± 1.0) × 105 ‡

Macrophages

(22.6 ± 3.5) × 105

(10.9 ± 2.3) × 105 ‡

Lymphocytes

(4.7 ± 0.5) × 105

(1.1 ± 0.3) × 105 ‡

  1. BAL = bronchoalveolar lavage; CMV = conventional mechanical ventilation; HFO = high-frequency oscillatory ventilation. *Before ventilation; after 4 h ventilation; P <0.05.