Objective To investigate the preventive and treating effectiveness of pulmonary complication following thoracotomy by percutaneous thyrocricocentesis cannulation.

Clinical study on diagnosis and treatment of 34-patient with malignant pericardial effusion by percutaneous pericardiocentesis and transcatheter;

Objective To develop a thyrocricoid puncture device to study its cure effect in rescuing patients who suffer from the obstruction of upper respiratory tract caused by war wounds,traffic accidents and pharyngolaryngeal tumor.

Percutaneous transhepatic gallbladder drainage under color Doppler ultrasound in critically ill patients;

Prevention and nursing of complications by percutaneous puncture under CT guidance;

VE:To compare the effect between general anesthesia by nasal cavity blindly intubation with and without topical anesthesia through thyrocricocentesis in maxillofacial operations.