Device for respiration by using a tubus

Patent metadata

Field	Value
Publication number	US-11419996-B2
Application number	US-201816180189-A
Country	US
Kind code	B2
Filing date	Nov 5, 2018
Priority date	Nov 7, 2017
Publication date	Aug 23, 2022
Grant date	Aug 23, 2022

Abstract

The invention relates to a breathing apparatus, which comprises a respiratory gas source, a control unit and a device for connection to a tube. The control unit of the apparatus is connected to at least one sensor for recording a measurement value, the control unit comprising a pressure generator for setting at least two pressure levels generated by the respiratory gas source and a memory for measurement values, and the sensor being configured for measuring a flow and being coupled to an analyzer which determines the volume. The apparatus operates as specified in the claims.

First claim

What is claimed is:

1. A breathing apparatus, wherein the apparatus comprises a respiratory gas source, a control unit and a device for connection to an endotracheal tube or endotracheal cannula, the control unit being connected to at least one sensor for recording at least one measurement value and comprising a pressure generator for setting at least two pressure levels generated by the respiratory gas source and a memory for the measurement values, the at least one sensor being configured for measuring a flow and being coupled to an analyzer which determines a volume, and the pressure generator setting a pressure initially to an expiratory level Pe 1 and then to an inspiratory level Pi 1 , the at least one sensor determining the flow and the analyzer determining a resulting volume V 1 and storing V 1 in the memory, the pressure generator in a subsequent breathing cycle increasing the pressure from the expiratory level Pe 1 with a predeterminable pressure profile to an inspiratory level Pi 2 , the pressure Pi 2 being higher than the pressure Pi 1 , the at least one sensor determining the flow and the analyzer determining a volume V 2 , the pressure generator reducing the pressure to a pressure level which is lower than Pi 2 only when the volume V 2 has reached a predefined fraction of the volume V 1 .

2. The apparatus of claim 1 , wherein the pressure Pi 2 corresponds to a predetermined maximum pressure Pmax.

3. The apparatus of claim 2 , wherein the predetermined Pmax is from 1 to 6 mbar.

4. The apparatus of claim 1 , wherein the predeterminable pressure profile corresponds to a pressure ramp of 50-380 ms.

5. The apparatus of claim 1 , wherein the predeterminable pressure profile corresponds to a pressure ramp predetermined by a user or the breathing apparatus.

6. The apparatus of claim 1 , wherein the pressure generator, starting from the pressure Pe 1 , sets the pressure Pi 2 and, in this case, the volume V 2 is reached in a predetermined time.

7. The apparatus of claim 6 , wherein the predetermined time is 100-600 ms.

8. The apparatus of claim 1 , wherein the pressure generator, starting from the pressure Pe 1 , sets the pressure Pi 2 and the flow reaches a predetermined level.

9. The apparatus of claim 8 , wherein the predetermined level of the flow is 5-20 l/min.

10. The apparatus of claim 1 , wherein the pressure generator, starting from the pressure Pe 1 , sets the pressure Pi 2 and, in this case, the volume V 2 is reached in a time of 300-400 ms.

11. The apparatus of claim 1 , wherein, when a time it takes to reach V 2 is shorter than 200-400 ms, the pressure Pi 2 is reduced for the next breathing cycle, and when a time it takes to reach V 2 is longer than 250-450 ms, the pressure Pi 2 is increased for the next breathing cycle.

12. The apparatus of claim 1 , wherein the volume V 2 is 60-95% of the volume V 1 .

13. The apparatus of claim 1 , wherein, after an expiratory pressure level Pe 2 has been set, the low pressure level Pe 1 is set again and then the inspiratory pressure level Pi 1 or Pi 2 is set.

14. The apparatus of claim 1 , wherein the pressure profile is controlled as a function of flow.

15. The apparatus of claim 1 , wherein the pressure generator, starting from the pressure Pi 2 , sets the pressure Pi 1 when the volume V 2 has reached the predefined fraction of the volume V 1 .

16. The apparatus of claim 1 , wherein the pressure profile is controlled as a function of V 1 and/or V 2 .

17. A breathing apparatus, wherein the apparatus comprises a respiratory gas source, a control unit and a device for connection to an endotracheal tube or endotracheal cannula, the control unit being connected to at least one sensor for recording a measurement value and comprising a pressure generator for setting at least two pressure levels generated by the respiratory gas source and a memory for the measurement values, the at least one sensor being configured for measuring a flow and being coupled to an analyzer which determines the volume, and the pressure generator setting a pressure initially to an expiratory level Pe 1 and then to an inspiratory level Pi 1 , the at least one sensor determining the flow and the analyzer determining a resulting volume V 1 and storing V 1 in the memory, the pressure generator in a subsequent breathing cycle increasing the pressure from the expiratory level Pi 1 with a pressure profile to an inspiratory level Pi 2 , the pressure Pi 2 being higher than the pressure Pi 1 , the at least one sensor determining the flow and the analyzer determining a volume V 2 , the pressure generator reducing the pressure to a lower pressure level than Pi 2 only when the volume V 2 has reached a predefined fraction of the volume V 1 and/or the flow has decreased to a predetermined level and/or the predefined fraction of the volume V 1 has flowed in a predefined time.

18. The apparatus of claim 17 , wherein the pressure generator reduces the pressure to a lower pressure than Pi 2 only when the predefined faction of the volume V 1 has flowed in a predefined time, the predefined time being 50-500 ms.

19. The apparatus of claim 17 , wherein the pressure generator reduces the pressure to a lower pressure than Pi 2 only when the flow has decreased to a predetermined level.

20. A breathing apparatus, wherein the apparatus comprises a respiratory gas source, a control unit and a device for connection to an endotracheal tube or endotracheal cannula, the control unit being connected to at least one sensor for recording at least one measurement value and comprising a pressure generator for setting at least two pressure levels generated by the respiratory gas source and a memory for the measurement values, the at least one sensor being configured for measuring a flow and being coupled to an analyzer which determines a volume, and the pressure generator setting a pressure initially to an expiratory level Pe 1 and then to an inspiratory level Pi 1 , the at least one sensor determining the flow and the analyzer determining a resulting volume V 1 and storing V 1 in the memory, the pressure generator in a subsequent breathing cycle increasing the pressure from the expiratory level Pe 1 with a predeterminable pressure profile to an inspiratory level Pi 2 , the at least one sensor determining the flow and the analyzer determining a volume V 2 , the pressure generator reducing the pressure to a pressure level which is lower than Pi 2 only when the volume V 2 has reached a predefined fraction of the volume V 1 and wherein, when a time it takes to reach V 2 is shorter than 200-400 ms, the pressure Pi 2 is reduced for the next breathing cycle, and when a time it takes to reach V 2 is longer than 250-450 ms, the pressure Pi 2 is increased for the next breathing cycle.

Assignees

• Loewenstein Medical Tech Sa

Inventors

• Geske Ralf
• Kremeier Peter

Classifications

• A61M16/04 Primary

  Tracheal tubes (catheters in general A61M25/00) · CPC title

• A61M2016/003

  with a flowmeter · CPC title

• A61M16/06

  Respiratory or anaesthetic masks · CPC title

• A61M16/20

  Valves specially adapted to medical respiratory devices · CPC title

• A61M2016/0027

  pressure meter · CPC title