[The characteristics of biofilm formation in endotracheal tubes in ventilated patients].

Objective: To evaluate the etiology and drug resistance of biofilms in endotracheal tubes in respiratory intensive care unit (RICU).

Methods: A prospective cohort study was conducted. The biofilms were observed by scanning electron microscopy at different times of ventilation.

[The change and significance of the cardiopulmonary exercise test parameters in patients with obstructive sleep apnea-hypopnea syndrome].

Objective: To investigate the change of exercise cardiopulmonary function in patients with obstructive sleep apnea-hypopnea syndrome (OSAHS).

Methods: Thirty OSAHS patients and 18 normal healthy adults (control group) were studied by cardiopulmonary exercise test (CPET). The results including maximal oxygen uptake percent predicted (Vo(2)max% predicted), oxygen uptake to work rate (Vo(2)/WR), oxygen pulse percent predicted (Vo(2)/HRmax% predicted), anaerobic threshold to maximal oxygen uptake (AT/Vo(2)max), breathing reserve (V(E)max/MVV) and ventilatory equivalents for carbon dioxide (V(E)/V(CO2)) were compared between two groups.

[Study on hemodynamic changes and cardiac troponin I level in pig model of acute experimental pulmonary embolism].

Objective: To evaluate the hemodynamic effects and cardiac troponin I (cTn I), creatine kinase-MB (CK-MB), myoglobin (Mb) releasing kinetics of acute experimental pulmonary embolism of pigs.

Methods: Sixteen juvenile pigs, of either gender and weighing 30 to 40 kg were studied, 8 in the embolism group and 8 in the control group. The 8 embolism animals received 0.