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Valve controlled high frequency oscillatory ventilation

A technology of oscillating pressure and airflow, which is applied in the direction of pharmaceutical equipment, other medical equipment, respirators, etc., and can solve the problems of inability to generate negative pressure, increase the cost and complexity of the ventilator, and noise

Active Publication Date: 2015-05-20
MAQUET CRITICAL CARE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] There are several disadvantages associated with HFO ventilators according to the prior art, and piston and speaker based HFO ventilators are sometimes noisy due to high frequency movement of the piston or diaphragm
Ejector-based HFO ventilators sometimes fail to generate sufficient negative pressure to fully support the patient's active exhalation
Furthermore, the need for an oscillation generator in the form of a piston, speaker or ejector adds to the cost and complexity of the ventilator

Method used

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  • Valve controlled high frequency oscillatory ventilation
  • Valve controlled high frequency oscillatory ventilation
  • Valve controlled high frequency oscillatory ventilation

Examples

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Embodiment Construction

[0043] figure 1 There is shown a breathing apparatus 1 for providing high frequency oscillatory (HFO) ventilation to a patient 3 according to an exemplary embodiment of the invention. Respiratory apparatus 1 is a ventilator comprising an inspiratory line 5 for delivering pressurized breathing gas from at least one gas source 7 to a patient 3, and a system (not shown) for delivering exhaled gas away from the patient 3 to the atmosphere or to a purification system (not shown) The exhalation line 9. The inspiratory line 5 and the expiratory line 9 are connected to each other and to the patient 3 via a patient connector 11 comprising a common line 13 for delivering breathing gases to the patient and exhaling gases from the patient. The patient connector 11 also comprises a so-called Y-piece connecting the inspiratory line 5 and the expiratory line 9 with a common line 13 . The inspiratory line 5 , the expiratory line 9 and the patient connector 11 together form the patient circu...

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Abstract

The present invention provides a breathing apparatus (1) for providing high frequency oscillatory ventilation to a patient (3) by supplying breathing gas to the patient according to an oscillating pressure profile oscillating between a positive pressure and a negative pressure. The breathing apparatus comprises a patient circuit including an inspiratory line (5) and an expiratory line (9). It further comprises an inspiration valve (17) for regulating a flow of pressurised breathing gas into the inspiration line, and a control unit (21) for controlling the inspiration valve. The control unit is operable to cause the oscillating pressure profile by controlling the inspiration valve to oscillate between a top flow position in which the flow of breathing gas through the inspiration valve assumes a top flow value, and a minimum flow position in which the flow through the inspiration valve assumes a minimum flow value.

Description

technical field [0001] The present invention relates to a respiratory apparatus, method and computer program for providing high frequency oscillatory ventilation to a patient. Background technique [0002] High frequency oscillatory ventilation (HFO or HFOV) is commonly used to deliver small tidal volumes of breathing gas to neonatal patients who cannot be adequately ventilated using conventional ventilation. During inspiration, overpressure is created in the ventilator's breathing circuit to push breathing gases into the patient, while during exhalation, negative pressure in the breathing circuit is used to pull gases out of the patient's airway. The application of a pressure profile oscillating between positive and negative pressure relative to ambient pressure (atmospheric pressure) makes both inspiration and expiration "active", which minimizes the risk of gas trapping in the patient. [0003] HFO ventilation is typically performed in the frequency range of 5-20 Hz at t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61M16/00A61M16/20
CPCA61M16/0096A61M16/12A61M2016/0021A61M2016/0027A61M2016/0036A61M2016/0039A61M2016/0042A61M16/0009A61M16/204A61M16/205A61M16/206A61M16/0057A61M2205/3334A61M2205/52A61M16/0003
Inventor 斯特凡·林德斯特伦卡尔-埃里克·特罗伊利芒努斯·哈尔巴克
Owner MAQUET CRITICAL CARE
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