PCD RTM Vent Modes

Ventilator Operational Mode Semantic Model

A key item in the Vent TG's discussion is to identify the core semantic components that make up a ventilator's operational modality. This in turn can be used to organize a device's settings, waveform annotations, etc. It is understood that the actual labels associated to a given mode will vary from vendor's device to device, and should eventually be harmonized with related activities such as the work being done within ISO TC121/SC 3/JWG 1 (Joint with IEC/SC62D) Critical Care Ventilators. Component semantics should be flexible enough to support all of these usages, though.

Note: This is also intended to result in an update to the existing ventilator operational modality terminology standard contained in ISO/IEEE 11073-10101 Health informatics - Point-of-care medical device communication - Nomenclature document.

The following table illustrates the current model being proposed:

Ventilatator Operational Mode Attributes

Atrribute	Description	Discussion
Patient Interface	<general semantic attribute description> Option(IV-Invasive): Option(NIV-Non-Invasive):	...
Delivery Method	<general semantic attribute description> Option(PP-Positive Pressure): Option(NP-Negative Pressure): Option(HF-High Frequency):	...
Breathing Pattern	<general semantic attribute description> Option(CMV-Continuous Mandatory Ventilation): Option(IMV-Intermittent Mandatory Ventilation): Option(CSV-Continuous Spontaneous Ventilation):	...
Breath Shape	<general semantic attribute description> Option(P-Pressure): Option(F-Flow): Option(PF-Pressure transitioning to Flow): Option(FP-Flow transitioning to Pressure): Option(V-Volume...integral of flow): Option(T-Time):	Is BreathShape::Time redundant since time is ALWAYS a component?
Adaptive Targets	<general semantic attribute description> Option(NOS-Not Otherwise Specified): Option(MMV-Mandatory Minute Volume): Option(V-Volume): Option(FQ-Frequency): Option(EtO2-Control for O2 content): Option(EtCO2-Control for CO2 content):	...
Assist Augmentation	<general semantic attribute description> Option(TBD-...):	Note: During the 2008-05-15 WebEx it was decided to add another Attribute to this table - "Assist/Support Breath Augmentation" (final name TBD).

Reference Documents

• <add references to documents that are related to this vent mode analysis>

Mode Issues List

The following table captures the current issues that need to be resolved regarding the above model:

Item	Submitters	Attr	Topic	Description	Discussion/Disposition
1	Berryhill	Breath Shape	PF or is it really PV?	Mark wanted to know if the BREATH SHAPE item should be classified as Pressure-Flow or Pressure-Volume. In his opinion, in a volume assured breath, you set the pressure, then maintain it until you reach the assured volume-Joel	.
2	tbd	.	.	.	.

Mode Mapping Sandboxes

The table below may be used to try out mapping specific vent modes (real modes provided on real vents!) and to discuss issues with the model above - gaps, adjustments, etc.

NOTE: A sample table has been provided - copy that heading and table and then use it as a sandbox for your own mappings.

Mode Sandbox Table: (Sample)

Mode Name	P/I	D/M	B/P	B/S	A/T	B/M	Description/Notes
High Freq	IV	HF	n/a	n/a	n/a	n/a	...
tbd	tbd	tbd	.	.	.	.	...