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[1] first_day_sofa.sql is missing the restriction for arterial pO2, specifically WHERE specimen = 'ART.'
pafi1 AS (
/* join blood gas to ventilation durations to determine if patient was vent */
SELECT
ie.stay_id,
bg.charttime,
bg.pao2fio2ratio,
CASE WHEN NOT vd.stay_id IS NULL THEN 1 ELSE 0 END AS isvent
FROM mimiciv_icu.icustays AS ie
LEFT JOIN mimiciv_derived.bg AS bg
ON ie.subject_id = bg.subject_id
AND bg.charttime >= ie.intime - INTERVAL '6 HOUR'
AND bg.charttime <= ie.intime + INTERVAL '1 DAY'
LEFT JOIN mimiciv_derived.ventilation AS vd
ON ie.stay_id = vd.stay_id
AND bg.charttime >= vd.starttime
AND bg.charttime <= vd.endtime
AND vd.ventilation_status = 'InvasiveVent'
)
[2] Regarding the restriction of vd.ventilation_status = 'InvasiveVent', I am confused about whether the respiratory support in the SOFA score includes only invasive mechanical ventilation, why not include vd.ventilation_status = 'NonInvasiveVent'?
In MIMIC-III code repository, respiratory support includes Noninvasive mechanical ventilation,the restriction is MechVent = 1 or Extubated = 1
mimiciii--ventilation_classification.sql
, max(
case
when itemid is null or value is null then 0 -- can't have null values
when itemid = 720 and value != 'Other/Remarks' THEN 1 -- VentTypeRecorded
when itemid = 223848 and value != 'Other' THEN 1
when itemid = 223849 then 1 -- ventilator mode
when itemid = 467 and value = 'Ventilator' THEN 1 -- O2 delivery device == ventilator
when itemid in
(
445, 448, 449, 450, 1340, 1486, 1600, 224687 -- minute volume
, 639, 654, 681, 682, 683, 684,224685,224684,224686 -- tidal volume
, 218,436,535,444,459,224697,224695,224696,224746,224747 -- High/Low/Peak/Mean/Neg insp force ("RespPressure")
, 221,1,1211,1655,2000,226873,224738,224419,224750,227187 -- Insp pressure
, 543 -- PlateauPressure
, 5865,5866,224707,224709,224705,224706 -- APRV pressure
, 60,437,505,506,686,220339,224700 -- PEEP
, 3459 -- high pressure relief
, 501,502,503,224702 -- PCV
, 223,667,668,669,670,671,672 -- TCPCV
, 224701 -- PSVlevel
)
THEN 1
else 0
end
) as MechVent
mimiciii--ventilation_durations.sql
, vd2 as
(
select vd1.*
-- create a cumulative sum of the instances of new ventilation
-- this results in a monotonic integer assigned to each instance of ventilation
, case when MechVent=1 or Extubated = 1 then
SUM( newvent )
OVER ( partition by icustay_id order by charttime )
else null end
as ventnum
--- now we convert CHARTTIME of ventilator settings into durations
from vd1
)
-- create the durations for each mechanical ventilation instance
select icustay_id
-- regenerate ventnum so it's sequential
, ROW_NUMBER() over (partition by icustay_id order by ventnum) as ventnum
, min(charttime) as starttime
, max(charttime) as endtime
, DATETIME_DIFF(max(charttime), min(charttime), 'MINUTE')/60 AS duration_hours
from vd2
group by icustay_id, vd2.ventnum
having min(charttime) != max(charttime)
-- patient had to be mechanically ventilated at least once
-- i.e. max(mechvent) should be 1
-- this excludes a frequent situation of NIV/oxygen before intub
-- in these cases, ventnum=0 and max(mechvent)=0, so they are ignored
and max(mechvent) = 1
order by icustay_id, ventnum
mimiciii--sofa.sql
, pafi1 as
(
-- join blood gas to ventilation durations to determine if patient was vent
select bg.icustay_id, bg.charttime
, pao2fio2
, case when vd.icustay_id is not null then 1 else 0 end as isvent
from blood_gas_first_day_arterial bg
left join ventilation_durations vd
on bg.icustay_id = vd.icustay_id
and bg.charttime >= vd.starttime
and bg.charttime <= vd.endtime
order by bg.icustay_id, bg.charttime
)
Interestingly, the Berlin definition for ARDS appears to include non-invasive mechanical ventilation as well.
Different pieces of information are conflicting. Which one should I choose?
Which one is more appropriate?
vd.ventilation_status = 'InvasiveVent
v.ventilation_status in ('InvasiveVent', 'NonInvasiveVent')
v.ventilation_status in ('InvasiveVent', 'Tracheostomy', 'NonInvasiveVent')
Thank you for your attention to this matter!
The text was updated successfully, but these errors were encountered:
Prerequisites
Description
Dear Database Administrator,
WHERE specimen = 'ART.'
vd.ventilation_status = 'InvasiveVent'
, I am confused about whether the respiratory support in the SOFA score includes only invasive mechanical ventilation, why not include vd.ventilation_status = 'NonInvasiveVent'?In MIMIC-III code repository, respiratory support includes Noninvasive mechanical ventilation,the restriction is
MechVent = 1 or Extubated = 1
mimiciii--ventilation_classification.sql
mimiciii--ventilation_durations.sql
mimiciii--sofa.sql
Interestingly, the Berlin definition for ARDS appears to include non-invasive mechanical ventilation as well.
Different pieces of information are conflicting. Which one should I choose?
Which one is more appropriate?
vd.ventilation_status = 'InvasiveVent
v.ventilation_status in ('InvasiveVent', 'NonInvasiveVent')
v.ventilation_status in ('InvasiveVent', 'Tracheostomy', 'NonInvasiveVent')
Thank you for your attention to this matter!
The text was updated successfully, but these errors were encountered: