define "No VTE Prophylaxis Device Applied":
  ["Procedure": "Device Application"] DeviceApplied
    let DeviceNotDoneTiming: Global.GetExtension(DeviceApplied, 'qicore-recorded').value
    where (DeviceApplied.usedCode in "Intermittent pneumatic compression devices (IPC)"
      or DeviceApplied.usedCode in "Venous foot pumps (VFP)"
      or DeviceApplied.usedCode in "Graduated compression stockings (GCS)"
    )
      and  DeviceApplied.status = 'not-done'
    return {id: DeviceApplied.id, requestStatusReason: DeviceApplied.statusReason, authoredOn: DeviceNotDoneTiming}

See the patterns page for implementation and usage patterns.