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EP-4129169-B1 - METHOD AND APPARATUS FOR MONITORING VENTILATION OF PATIENT

EP4129169B1EP 4129169 B1EP4129169 B1EP 4129169B1EP-4129169-B1

Inventors

  • ZOU, Xinru
  • LIU, JINGLEI
  • ZHOU, XIAOYONG

Dates

Publication Date
20260506
Application Date
20200323

Claims (15)

  1. A method for monitoring ventilation of a patient, comprising: acquiring a pressure of the patient during a mechanical ventilation process; acquiring a gas flow rate of the patient during the mechanical ventilation process; calculating, according to the acquired pressure and the acquired gas flow rate, energy which acts on the respiratory system of the patient during the mechanical ventilation process; and acquiring a ventilation parameter; characterized in that , the method for monitoring ventilation of a patient further comprises: determining a degree of contribution of the ventilation parameter to the energy which acts on the respiratory system of the patient during the mechanical ventilation process; wherein the pressure reflects a pressure which acts on different sites of a respiratory system of the patient during the mechanical ventilation process.
  2. The method for monitoring ventilation of a patient according to claim 1, characterized in that , the ventilation parameter comprises a ventilation control parameter and/or a respiratory system related parameter; wherein the ventilation control parameter comprises one or more of tidal volume, gas flow rate, drive pressure, positive respiratory end pressure, respiratory rate and respiratory ratio, and the respiratory system related parameter comprises one or more of respiratory system compliance and respiratory system resistance.
  3. The method for monitoring ventilation of a patient according to claim 2, characterized in that , further comprising: displaying the degree of contribution of each ventilation parameter; preferably, the degree of contribution of each ventilation parameter is displayed in one or more manners of word, number, character, table, diagram or icon.
  4. The method for monitoring ventilation of a patient according to any one of claims 1-3, characterized in that , further comprising: guiding the mechanical ventilation process according to the degree of contribution.
  5. The method for monitoring ventilation of a patient according to claim 4, characterized in that , guiding the mechanical ventilation process according to the degree of contribution, comprises: indicating to decrease the ventilation parameter according to a ranking of the degree of contribution or controlling to decrease the ventilation parameter according to a ranking of the degree of contribution, when determining that the energy which acts on the respiratory system of the patient during the mechanical ventilation process, exceeds a first threshold.
  6. The method for monitoring ventilation of a patient according to claim 4, characterized in that , guiding the mechanical ventilation process according to the degree of contribution, comprises: indicating to increase the ventilation parameter according to a ranking of the degree of contribution or controlling to increase the ventilation parameter according to a ranking of the degree of contribution, when determining that the energy which acts on the respiratory system of the patient during the mechanical ventilation process, is lower than a second threshold.
  7. The method for monitoring ventilation of a patient according to claim 4, characterized in that , guiding the mechanical ventilation process according to the degree of contribution, comprises: estimating and outputting the energy which acts on the respiratory system of the patient, during the mechanical ventilation process which is set according to a setting command of a ventilation control parameter.
  8. The method for monitoring ventilation of a patient according to claim 7, characterized in that , guiding the mechanical ventilation process according to the degree of contribution, further comprises: determining whether to send an alarm according to the estimated energy which acts on the respiratory system of the patient, during the mechanical ventilation process.
  9. The method for monitoring ventilation of a patient according to claim 4, characterized in that , guiding the mechanical ventilation process according to the degree of contribution, comprises: determining whether to send an alarm according to the degree of contribution of each respiratory system related parameter.
  10. An apparatus for monitoring ventilation of a patient, comprising: a pressure sensor, which is configured to acquire a pressure of a patient during a mechanical ventilation process; a flow sensor, which is configured to acquire a gas flow rate of the patient during the mechanical ventilation process; and a processor, which is configured to acquire the pressure of the patient during the mechanical ventilation process and the gas flow rate of the patient during the mechanical ventilation process, and to calculate, according to the acquired pressure and the acquired gas flow rate, energy which acts on the respiratory system of the patient during the mechanical ventilation process; wherein the processor is further configured to acquire a ventilation parameter; characterized in that , the processor is further configured to determine a degree of contribution of the ventilation parameter to the energy which acts on the respiratory system of the patient during the mechanical ventilation process; wherein the pressure reflects a pressure which acts on different sites of a respiratory system of the patient during the mechanical ventilation process.
  11. The apparatus for monitoring ventilation of a patient according to claim 10, characterized in that , the ventilation parameter comprises a ventilation control parameter and/or a respiratory system related parameter; wherein the ventilation control parameter comprises one or more of tidal volume, a gas flow rate, drive pressure, positive respiratory end pressure, respiratory rate and respiratory ratio, and the respiratory system related parameter comprises one or more of respiratory system compliance and respiratory system resistance.
  12. The apparatus for monitoring ventilation of a patient according to claim 10 or claim 11, characterized in that , the processor is further configured to guide the mechanical ventilation process according to the degree of contribution.
  13. The apparatus for monitoring ventilation of a patient according to claim 12, characterized in that , in order to guide the mechanical ventilation process according to the degree of contribution, the processor is further configured to: indicate to preferentially decrease the ventilation parameter with a largest degree of contribution among ventilation control parameters, or control to preferentially decrease the ventilation parameter with a largest degree of contribution among ventilation control parameters, when determining that the energy which acts on the respiratory system of the patient during the mechanical ventilation process, exceeds a first threshold; and/or indicate to preferentially increase the ventilation parameter with a smallest degree of contribution among ventilation control parameters, or control to preferentially increase the ventilation parameter with a smallest degree of contribution among ventilation control parameters, when determining that the energy which acts on the respiratory system of the patient during the mechanical ventilation process, is lower than a second threshold.
  14. The apparatus for monitoring ventilation of a patient according to claim 12, characterized in that , in order to guide the mechanical ventilation process according to the degree of contribution, the processor is further configured to: estimate and output the energy which acts on the respiratory system of the patient, during the mechanical ventilation process which is set according to a setting command of a ventilation control parameter, and determine whether to send an alarm according to the estimated energy which acts on the respiratory system of the patient, during the mechanical ventilation process; or in order to guide the mechanical ventilation process according to the degree of contribution, the processor is further configured to: determine whether to send an alarm according to the degree of contribution of each respiratory system related parameter.
  15. The apparatus for monitoring ventilation of a patient according to claim 10, characterized in that , the apparatus for monitoring ventilation of a patient is a patient monitor, a patient monitoring module or a medical ventilation apparatus; and/or the apparatus for monitoring ventilation of a patient further comprises a display, which is configured to display the degree of contribution of each ventilation parameter.

Description

TECHNICAL FIELD The disclosure relates to a method and apparatus for monitoring ventilation of a patient. BACKGROUND Human respiration refers to periodic rhythmic inhalation and exhalation of gas, absorption of oxygen and discharge of carbon dioxide, which are for gas exchange. When some patients are unable to breathe spontaneously, mechanical ventilation process can be configured to help them finish respiration. For example, if the patient does not breathe spontaneously, external devices, such as a ventilator can usually be configured to provide ventilatory support to the patient. It can be seen that mechanical ventilation process is a ventilation method that uses a mechanical device to replace, control or change the spontaneous ventilation action of the patient. However, mechanical ventilation process is also easy to cause lung injury (ventilator induced lung injury, VILI) to the patients. Typically, during the mechanical ventilation process, improper setting of related mechanical device, such as ventilator, causes lung injury to the patients. Therefore, how to control, regulate and preset parameters of related mechanical devices to avoid lung injury caused by mechanical ventilation process, and even in turn to improve the lung related parameters of the patients, is a problem that technicians have been studying. US2007/028921A1 teaches a method of controlling pulmonary ventilation for a ventilator utilize a trainable neural network to determine the desired level settings of the ventilator setting controls, and employ such desired level settings of the ventilator setting controls and the ventilation data output signal to control the ventilator. US2009/062674A teaches a spirometry-based method for calculating work of breathing (WOB) based on an airway gas flow and an airway pressure. However, neither of these prior arts mentions monitoring ventilation of a patient. SUMMARY This disclosure mainly provides a method and apparatus for monitoring ventilation of a patient. According to a first aspect, an embodiment provides a method for monitoring ventilation of a patient, including: acquiring a pressure of the patient during a mechanical ventilation process, wherein the pressure reflects a pressure which acts on different sites of a respiratory system of the patient during the mechanical ventilation process;acquiring a gas flow rate of the patient during the mechanical ventilation process;calculating, according to the acquired pressure and the acquired gas flow rate, energy which acts on the respiratory system of the patient during the mechanical ventilation process;acquiring a ventilation parameter; anddetermining a degree of contribution of the ventilation parameter to the energy which acts on the respiratory system of the patient during the mechanical ventilation process. In one embodiment, the ventilation parameter includes a ventilation control parameter and/or a respiratory system related parameter; wherein the ventilation control parameter comprises one or more of tidal volume, gas flow rate, drive pressure, positive respiratory end pressure, respiratory rate and respiratory ratio, and the respiratory system related parameter comprises one or more of respiratory system compliance and respiratory system resistance. In an embodiment, the method for monitoring ventilation of a patient further includes displaying the degree of contribution of each ventilation parameter. In an embodiment, the degree of contribution of each ventilation parameter is displayed in one or more manners of word, number, character, table, diagram or icon. In an embodiment, the method for monitoring ventilation of a patient further includes guiding the mechanical ventilation process according to the degree of contribution. In an embodiment, guiding the mechanical ventilation process according to the degree of contribution, includes: indicating to decrease the ventilation parameter according to a ranking of the degree of contribution or controlling to decrease the ventilation parameter according to a ranking of the degree of contribution, when determining that the energy which acts on the respiratory system of the patient during the mechanical ventilation process, exceeds a first threshold. In an embodiment, guiding the mechanical ventilation process according to the degree of contribution, includes: indicating to increase the ventilation parameter according to a ranking of the degree of contribution or controlling to increase the ventilation parameter according to a ranking of the degree of contribution, when determining that the energy which acts on the respiratory system of the patient during the mechanical ventilation process, is lower than a second threshold. In an embodiment, guiding the mechanical ventilation process according to the degree of contribution, includes: estimating and outputting the energy which acts on the respiratory system of the patient, during the mechanical ventilation process which is set according to a setti