This article analyses the principle of the PAV, researches into its clinical applications, estimates its merits and demerits, and discusses the new ventilation mode in contrast with the old ones.
Humans ; Respiration, Artificial ; methods

To learn reading respiratory waveform and ring is a key step to good use of respirator, which will help clinicians to analyze the status of the use of respirator and real time changes in patient's lung mechanics from the changes of respiratory wave and ring, for making use of respirator reasonably, scientifically and objectively to provide advanced methods. This article only explains the physical basis of respiratory wave and ring.
Respiration ; Respiration, Artificial ; methods ; Respiratory Mechanics

The principle of Position Transformation Mechanical Ventilation (PTMV) was introduced briefly, and the mechanical structure and the intelligent control algorithm were studied. According to the principle and function requirement of PTMV, the mechanical structure of slip pole driven rocking chair(SPDRC) was proposed, the dynamics model of SPDRC was established, and the auto disturbance rejection controller was designed. The integrated model of control system was structured by using ADAMS and MATLAB, and the model validation and simulation were implemented. The simulation results indicate that the mechanical structure is feasible and the control process of ADRC is precise and steady.
Algorithms ; Models, Biological ; Posture ; Respiration, Artificial ; methods

The summary of common ventilation modes is presented in the paper. Characteristics, work principle, the advantage on the clinical application and parameter adjustment are analyzed to help users overcome the clinical difficulty using respirators.
Humans ; Pulmonary Ventilation ; Respiration, Artificial ; methods

Although the study of inhalation injury is deepening gradually, its clinical treatment is still difficult, and its mortality rate remains high due to the complicated pathophysiologic characteristics. This article reviews the recent progress in research and treatment of inhalation injury, acute lung injury, and acute respiratory distress syndrome at home and abroad, focusing on the effect of mechanical ventilation models, including the non-invasive ventilation, lung protective ventilation, liquid ventilation, high frequency ventilation, on respiratory support in early stage of inhalation injury. The effects of medications for inhalation injury are summarized, and the prospect of stem cell therapy for inhalation injury is also discussed.
Burns, Inhalation ; therapy ; Humans ; Respiration, Artificial ; methods

A mechanical ventilation trigger way is set forth and a technical analysis on the pressure trigger way and flow trigger way is made in this paper. And it is pointed out that the PEEPi's influence on the human organism is the reason for the latter two kinds of trigger ways' notable differences in the measured values of the inspiration time and breath work.
Humans ; Positive-Pressure Respiration ; Respiration, Artificial ; methods ; Work of Breathing

Without artificial airway though oral, nasal or airway incision, the bi-level positive airway pressure (Bi-PAP) has been widely employed for respiratory patients. In an effort to investigate the therapeutic effects and measures for the respiratory patients under the noninvasive Bi-PAP ventilation, a therapy system model was designed for virtual ventilation experiments. In this system model, it includes a sub-model of noninvasive Bi-PAP respirator, a sub-model of respiratory patient, and a sub-model of the breath circuit and mask. And based on the Matlab Simulink, a simulation platform for the noninvasive Bi-PAP therapy system was developed to conduct the virtual experiments in simulated respiratory patient with no spontaneous breathing (NSB), chronic obstructive pulmonary disease (COPD) and acute respiratory distress syndrome (ARDS). The simulated outputs such as the respiratory flows, pressures, volumes, etc, were collected and compared to the outputs which were obtained in the physical experiments with the active servo lung. By statistically analyzed with SPSS, the results demonstrated that there was no significant difference ( P > 0.1) and was in high similarity ( R > 0.7) between the data collected in simulations and physical experiments. The therapy system model of noninvasive Bi-PAP is probably applied for simulating the practical clinical experiment, and maybe conveniently applied to study the technology of noninvasive Bi-PAP for clinicians.
Humans ; Respiration, Artificial/methods* ; Positive-Pressure Respiration/methods* ; Respiration ; Ventilators, Mechanical ; Lung

Tracheostomy is to establish an artificial airway by making an opening at anterior tracheal wall. Due to the blossom of mechanical ventilation and intensive care unit after 1950s, tracheostomy is the most favorable surgical method to access airway at present. In addition to traditional surgical tracheostomy, percutaneous dilational tracheostomy have gained increasing popularity and become an alternative procedure because of its merits such as easier manipulation, shorter operative duration and less complications. This review summarized tracheostomy from definition, history and current status, anatomy and physiology, indications, contraindications, timing, complications and management. We also elaborate our understanding of current contraercy and give some suggestions based on our clinical experience.
Humans ; Intensive Care Units ; Respiration, Artificial ; Trachea ; surgery ; Tracheostomy ; methods

The design principles of a noninvasive ventilator's turbine are studied and discussed in this paper. The design is completed from its several aspects and in combination of related theories, using SolidWorks tools. Abundant experimental results prove that this design's technical specifications meet all the requirements.
Equipment Design ; Respiration, Artificial ; instrumentation ; methods ; Ventilators, Mechanical

Neurocritical care (NCC) is not only generally guided by principles of general intensive care, but also directed by specific goals and methods. This review summarizes the common pulmonary diseases and pathophysiology affecting NCC patients and the progress made in strategies of respiratory support in NCC. This review highlights the possible interactions and pathways that have been revealed between neurological injuries and respiratory diseases, including the catecholamine pathway, systemic inflammatory reactions, adrenergic hypersensitivity, and dopaminergic signaling. Pulmonary complications of neurocritical patients include pneumonia, neurological pulmonary edema, and respiratory distress. Specific aspects of respiratory management include prioritizing the protection of the brain, and the goal of respiratory management is to avoid inappropriate blood gas composition levels and intracranial hypertension. Compared with the traditional mode of protective mechanical ventilation with low tidal volume (Vt), high positive end-expiratory pressure (PEEP), and recruitment maneuvers, low PEEP might yield a potential benefit in closing and protecting the lung tissue. Multimodal neuromonitoring can ensure the safety of respiratory maneuvers in clinical and scientific practice. Future studies are required to develop guidelines for respiratory management in NCC.
Humans ; Lung ; Lung Diseases/etiology* ; Positive-Pressure Respiration/methods* ; Respiration, Artificial/adverse effects* ; Tidal Volume