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US 11,452,830 B2Granted
Devices and methods for ventilating a patient
AssigneeVentinova Technologies B.V.
InventorsDietmar Enk, Thomas Heinrich Barnes, Dirk Theodorus Andreas Donk
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Abstract
The present invention relates to a plurality of ventilation devices, to ventilation devices having visualization apparatuses, and to methods for operating the ventilation devices. The intent is to minimize the energy input into the at least one airway of a patient as a result of the ventilation.
Claims14
Ventilation device for ventilating a patient, comprising:
- at least a fluid supply unit configured for supplying a fluid into at least one airway of a patient;
- a fluid discharge unit that is configured for discharging fluid from the at least one airway;
- a control device which, during a ventilation process for the at least one airway, during at least a one-time supply of the fluid into the at least one airway and at least a one-time discharge of the fluid from the at least one airway by operating the ventilation device, is configured to set a profile of a pressure Pin the airway and profile of a volume V of the fluid supplied to the airway and discharged from the airway according to V=fzp(P) and V=fAP(P), or according to P=f2v(V) and P=fav(V), wherein the ventilation process takes place within a pressure interval and within a volume interval;
- wherein the ventilation process is configured to be set by the control device such that
- a) over at least 60% of the pressure interval, a ratio of
- an absolute value of a measure of a change in a first volume that is present at a pressure P0 while supplying the fluid, i.e. dfAF/d(P)(P0) and
- an absolute value of a measure of the change in a second volume that is present at the same pressure P0 while discharging the fluid, i.e., dfZP/d(P)(P0) or
- b) over at least 60% of the volume interval, a ratio of
- an absolute value of a measure of the change in a first pressure that is present at a volume V0 while supplying the fluid, i.e., dfAV/d(V)(V0) and
- an absolute value of a measure of the change in a second pressure that is present at the same volume V0 while discharging the fluid, i.e. dfZV/d(V)(Vo), has a value of at least 0.5 and at most 2.0.
7 more elements
Method for operating a ventilation device provided for ventilating a patient, the ventilation device comprising:
- at least a fluid supply unit configured to supply a fluid into at least one airway;
- a fluid discharge unit configured to discharge the fluid from the at least one airway;
- and
- a control device, wherein the method comprises at least the following steps:
- a) carryout a ventilation process, including delivering at least a one-time supply of a fluid into the at least one airway and discharging at least a one-time discharge of the fluid from the airway by operating the ventilation device;
- wherein the ventilation process takes place within a pressure interval and within a volume interval;
- b) determining or setting a profile of at least one volume-pressure curve in a volume-pressure diagram by the control device during the ventilation process;
- wherein the curve has a first curve section V=fZP(P) or P=fZV(V), and a second curve section, V=fAP(P) or P=fAV(V), wherein the first curve section represents the profile of the supplied volume V and of the pressure P while supplying the fluid into the at least on airway, and the second curve section represents the profile of the discharged volume V and of the pressure P while discharging the fluid from the at least one airway wherein by use of the control device the ventilation process is configured to
- 1) over at least 60% of the pressure interval, a ratio of an absolute value of a first slope of the first curve section at a pressure P0, i.e. dfZP/d(P)(P0), and an absolute value of a second slope of the second curve section, at the pressure P0 has a value of at least 0.5 and at more 2.0, or
- 2) over at least 60% of the volume interval, a ratio of an absolute value of a first slope of the first curve section at a volume V0, i.e. dfAV/d(V)(V0), and an absolute value of a second slope of the second curve section, i.e., dfAV/d(V)(V0), at volume V0 has a value of at least 0.5 and at most 2.0.
7 more elements
Dependencies are inferred from the claim text.