2012-03-19 PCD Pulse Oximetry Project Meeting
Weekly Conference Call
Date: Monday, March 19th, 2012 Meeting will start at 1 pm.
Attendees
[expected]
- Leah Krynicky
- Ioana Singureanu
- Catherine Hoang
- Tom Bauld
- Toni Philips
- Rob Rawlins
- Sean McFarland
- Mike Henderson
- John Rhoads
- Rob Rawlins
- Lee Winslow
- Tocher Kellom
- Ben Loewenbach
Agenda
- (05 min) Roll call and meeting minutes approval
- (40 min) Data Requirements Analysis: We will continue last week's discussion of coded information and expand the discussion to alarm conditions and alerts. We also have additional information about reference ranges provided by John Rhoads:
- Pleth variability index – this may still be a one-vendor proprietary measurement. PVI may be a trademark. This may raise some issues for standardization and for IHE.
- Some devices report several, for example:
- the extreme range of technically possible measurement values from the device, regardless of whether they are consistent with being connected to a living patient (as for example, when connected to a test instrument) (rare)
- the physiological range (extreme range of physiologically possible values)
- the “normal” range, which may be settable by the user on a unit, patient category (e.g. neonate, pediatric, adult) or individual case basis (used for reference or display, as for example to place reference lines on a graphical display, but not used to generate alarms)
- the alarm range outside of which the device generates an alarm, usually settable per patient
- a panic range, a wider range outside of which a higher severity of alarm (e.g., life-threatening vs. non-life-threatening) is initiated
Maybe we only need one or perhaps two, but you need to specify what the meaning of the range is.
- (10 min) Document Review Process We will discuss the process used to peer-review the analysis model.
- (5 min) Action item update
Meeting Notes
We received additional thoughts from Dr. Goldman: There should be a "signal strength" or "percent modulation" available (some call it Perfusion Index, some have other names). This is essentially a measure of the AC component of the pleth, assumed to be produced by cyclic blood flow.
Alarms - most instrument shave "high" and "low" for various parameters. Some have two sets so that, for example, a small violation in sat produces a medium priority alarm, and a larger variation a high priority.
Instrument averaging time should be available over the interface. It is an essential part of interpreting transient desat events (for example, counting desat events in neonates, or measuring the lowest sat achieved during apneain a sleep study)
The probe type should be communicated (e.g. Neonatal, adult, ear, etc)
(At some point I'd like to review the list of all the 'goes out of" and "goes in to" signals for the pulse ox. Please let me know when/where to do that.)
Links
- Our data analysis identifies the core data elements required to support the use cases. Optional data elements are indicated by the [0..*] cardinality notation and repeating element are specified as [1..*].