Based on nutritional support, Cardiopulmonary rehabilitation and Levosimendan Bundle measures, and making beside checklist of patients with difficult ventilator weaning; Implementation of nutritional risk, respiratory function, and cardiac function assessment prior to weaning; Regulate the procedure to solve the problem of difficult-weaning patients with Non neurogenic disease in ICU. Thereby,improve the success rate of weaning patients, so as to shorten the ICU hospitalization time, reduce medical costs, reduce the complications of mechanical ventilation, improve the patient's quality of life.

Older than 16 years of age, ventilator therapy more than 1 weeks, Ventilator parameters meet the standard of ventilator removal, repeated more than 3 times SBT not successful, or within a short period of time within a week of successful weaning, no other new incentives to need ventilator support again, and delayed weaning from ventilator more than 1 months.

Inclusion Criteria:

Older than 16 years of age, ventilator therapy more than 1 weeks,ventilator parameters up to Weaning standard, repeated more than 3 times Spontaneous Breathing Test(SBT) not successful, or within a short period of time within a week of successful weaning, no other new incentives to re machine induced delayed more than 1 months or more offline.

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Exclusion Criteria:

Mechanical ventilation patients who are clearly defined as neurological disorders or advanced tumor wasting diseases, as well as those without informed consent.

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difficult-weaning patients with Non neurogenic disease in ICU.