US 9,802,016 B2 · Respiration system

Abstract

Respiration system for non-invasive positive-pressure respiration, with a pressure source providing respiratory gas, with a control and evaluation unit connected to sensors detecting a leakage volume, spontaneous respiration frequency, tidal volume and the inspiration time. The control and evaluation unit I) checks the leakage volume and reduces the inspiratory pressure assistance proceeding to ii) or triggers an alarm and returns to I), ii) checks the frequency and triggers an alarm and returns to I) or reduces or increases the inspiratory pressure and returns to I) or proceeds to step iii), iii) checks the volume and reduces or increases the inspiratory pressure and returns to I) or leaves the pressure assistance unchanged proceeding to step iv), iv) adjusts the time period of the pressure assistance, depending on the inspiration time, the time period being left unchanged if the inspiration time lies in the predefined inspiration time interval, and returns to I).

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Claims2

Dependent claims

A respiration system for non-invasive positive-pressure ventilation, the respiration system comprising:

a pressure source for providing respiratory gas with controllable pressure;
sensors to determine a leakage volume, a spontaneous respiration rate, a tidal volume and an inspiration time;
a control and analyzing unit configured to control the pressure source connected with the sensors, wherein the control and analyzing unit is configured to automatically perform the following measurements and settings in the sequence indicated:
i) to check the leakage volume (MV_LEAK) to determine whether the leakage volume is above a preset limit value, and to reduce an inspiratory pressure assistance if the leakage volume (MV_LEAK) is above a preset limit value and if the spontaneous respiration rate (F_SPON) is within a preset spontaneous respiration rate range and the tidal volume (VT) is within a preset tidal volume range, and to trigger an alarm if the spontaneous respiration rate (F_SPON) is outside the preset spontaneous respiration rate range or if the tidal volume (VT) is outside the preset tidal volume range and to return to a starting point, and to proceed to step ii) only if the leakage volume is below the preset limit value;
ii) to trigger the alarm and to return to step i) if the spontaneous respiration rate (F_SPON) is above a preset maximum or below a preset minimum, and to compare the spontaneous respiration rate (F_SPON) with the preset spontaneous respiration rate range, which is within the range between the preset maximum and the preset minimum, and to reduce the inspiratory pressure assistance if the spontaneous respiration rate (F_SPON) is above the preset spontaneous respiration rate range, and to increase the inspiratory pressure assistance if the spontaneous respiration rate (F_SPON) is below the preset range and to return to step i) after the increase or the reduction of the inspiratory pressure assistance, and to leave the inspiratory pressure assistance unchanged and to proceed to step iii) if the spontaneous respiration rate (F_SPON) is within the preset spontaneous respiration rate range;
iii) to check the tidal volume (VT) to determine whether the tidal volume is within the preset tidal volume range, and to reduce the inspiratory pressure assistance if the tidal volume is above the preset tidal volume range, and to increase the inspiratory pressure assistance if the tidal volume (VT) is below the preset tidal volume range and to return to step i) after the reduction or the increase, and to leave the inspiratory pressure assistance unchanged and to proceed to step iv) if the tidal volume (VT) is in the preset tidal volume range, and
iv) to set a time period during which the inspiratory pressure assistance is carried out as a function of the patient's inspiration time by increasing the time period of the inspiratory pressure assistance if the inspiration time (TI_SPON) is below a preset inspiration time range, and reducing the time period of the inspiratory pressure assistance if the inspiration time (TI_SPON) is above the preset inspiration time range, while the time period of the inspiratory pressure assistance is left unchanged if the inspiration time is within the preset inspiration time range, and the process is returned to step i).

4 more elements

A non-invasive positive-pressure ventilation method comprising the steps of:

providing respiration system comprising:
a pressure source for providing respiratory gas with controllable pressure;
sensors to determine a leakage volume, a spontaneous respiration rate, a tidal volume and an inspiration time;
a control and analyzing unit configured to control the pressure source connected with the sensors, wherein the control and analyzing unit is configured to automatically perform the following measurements and settings in the sequence indicated:
i) to check the leakage volume (MV_LEAK) to determine whether the leakage volume (MV_LEAK) is above a preset limit value, and to reduce the inspiratory pressure assistance if the leakage volume is above the preset limit value and if the spontaneous respiration rate (F_SPON) is within a preset spontaneous respiration rate range and the tidal volume (VT) is within a preset tidal volume range, and to trigger an alarm if the spontaneous respiration rate (F_SPON) is outside the preset spontaneous respiration rate range or if the tidal volume (VT) is outside the preset tidal volume range and to return to a starting point, and to proceed to step ii) only if the leakage volume is below the preset limit value;
ii) to trigger the alarm and to return to step i) if the spontaneous respiration rate (F_SPON) is above a preset maximum or below a preset minimum, and to compare the spontaneous respiration rate (F_SPON) with the preset spontaneous respiration rate range, which is within the range between the preset maximum and the preset minimum, and to reduce the inspiratory pressure assistance if the spontaneous respiration rate (F_SPON) is above the preset spontaneous respiration rate range, and to increase the inspiratory pressure assistance if the spontaneous respiration rate (F_SPON) is below the preset range and to return to step i) after the increase or the reduction of the inspiratory pressure assistance, and to leave the inspiratory pressure assistance unchanged and to proceed to step iii) if the spontaneous respiration rate (F_SPON) is within the preset spontaneous respiration rate range;
iii) to check the tidal volume (VT) to determine whether the tidal volume is within the preset tidal volume range, and to reduce the inspiratory pressure assistance if the tidal volume is above the preset tidal volume range, and to increase the inspiratory pressure assistance if the tidal volume (VT) is below the preset tidal volume range and to return to step i) after the reduction or the increase, and to leave the inspiratory pressure assistance unchanged and to proceed to step iv) if the tidal volume (VT) is in the preset tidal volume range, and
iv) to set a time period during which the inspiratory pressure assistance is carried out as a function of the patient's inspiration time by increasing the time period of the inspiratory pressure assistance if the inspiration time (TI_SPON) is below a preset inspiration time range, and reducing the time period of the inspiratory pressure assistance if the inspiration time (TI_SPON) is above the preset inspiration time range, while the time period of the inspiratory pressure assistance is left unchanged if the inspiration time is within the preset inspiration time range, and the process is returned to step i).

5 more elements

Dependencies are inferred from the claim text.

Description2,918 words

Summary1,513 words

#This application is a United States National Phase Application of International Application PCT/EP2013/051666 filed Jan. 29, 2013 and claims the benefit of priority under 35 U.S.C. §119 of German Patent Application DE 10 2012 003 115.7 filed Feb. 16, 2012, the entire contents of which are incorporated herein by reference.

#The invention pertains to a respiration system for non-invasive positive-pressure respiration with a pressure source for providing respiratory gas with controllable pressure, which is controlled by a control and analyzing unit, and with sensors connected with the control and analyzing unit, which make it possible to detect the leakage volume, the spontaneous respiration rate, the tidal volume and the inspiration time.

#Non-invasive ventilation (NIV) denotes a mechanical respiration assistance or form of respiration in which the patient's airways are accessed via a tightly fitting nasal or face mask (non-invasively) rather than via an endotracheal or tracheostomy tube (invasively). A distinction is made in non-invasive respiration therapy between negative-pressure ventilation (NPV) and positive-pressure ventilation (NIPPV—non-invasive positive-pressure ventilation) with the BIPAP (biphasic positive airway pressure) as well as CPAP/ASB (continuous positive airway pressure/assisted spontaneous breathing) respiration patterns. The present invention pertains to NIPPV in CPAP/ASB.

Brief description of the drawings3 figures

#In the drawings:

#FIG. 1 is a perspective view of a respiration system;

#FIG. 2 is a flow chart of the control of the respiration system according to the present invention; and

Detailed description1,352 words

#Referring to the drawings in particular, FIG. 1 shows a respiration system 1 with a tube system 2, which comprises an inspiratory line and an expiratory line, which open into a Y-piece at a breathing mask 4. A pressure source and a control and analyzing unit, which controls the output of respiratory gas with the desired pressure curve from the pressure source, are accommodated within the respiration system. Furthermore, sensors for detecting pneumatic variables, which are not shown specifically in FIG. 1, are present in the usual manner. The leakage volume, spontaneous respiration rate, tidal volume and further parameters are detected in the usual manner by the sensors.

#With reference to FIG. 2, the control and analyzing unit checks at first whether the tidal volume is variable. If not, the previous adjustment is evaluated. If the inspiratory pressure assistance was increased before, it is checked whether the patient's spontaneous respiration rate could be reduced hereby. If yes, one proceeds to the next step of checking.

#If neither the patient's spontaneous respiration rate could be reduced nor could the tidal volume be increased by the preceding increase in the inspiratory pressure assistance, the preceding increase in the inspiratory pressure assistance is taken back and one waits 5 minutes until the next cycle.

Facts

Application

14/377,700Filed 29 Jan 2013

Priority

DE 10 2012 003 11516 Feb 2012

Published

US 2015/0335839 A126 Nov 2015

Granted

31 Oct 2017

Term ends

22 Sep 2034

Estimated · how

20 years from earliest known nonprovisional domestic filing plus recorded patent term adjustment, including 601 days of adjustment. Maintenance-fee lapses, terminal disclaimers and statutory extensions have not been checked. The continuity chain may be incomplete; this is not an enforceability determination.

Classification13 codes

A61M 16/0051
Devices for influencing the respiratory system of patients by gas treatment, e.g. ventilators ; Tracheal tubes: with alarm devices
A61M 16/0003
Devices for influencing the respiratory system of patients by gas treatment, e.g. ventilators ; Tracheal tubes: accessories therefor, e.g.…
A61M 16/0069
Blowers or centrifugal pumps: the speed thereof being controlled by respiratory parameters, e.g. by inhalation
A61M 16/024
Control means therefor: including calculation means, e.g. using a processor

Timeline

16 Feb 2012Priority claimedDE 10 2012 003 115
29 Jan 2013Application filedUS 14/377,700
8 Aug 2014Assigned to Draeger Medical GmbHassignment of assignor's interest
26 Nov 2015PublishedUS 2015/0335839 A1
1 Jun 2016Assigned to DräGerwerk AG & Co. Kgaamerger
31 Oct 2017GrantedUS 9,802,016 B2
12 Oct 2026TodayWithin its term
22 Sep 2034Term endsEstimated, includes 601 days of adjustment

Respiration system

Life of this patent

Respiration system

Life of this patent

Life of this patent

Abstract

Drawings

Drawings

Claims2

Description2,918 words

Drawings

Classification13 codes

Life of this patent

Description2,918 words