The International Society for Heart and Lung Transplantation (ISHLT) reported a grading scheme for primary graft dysfunction, also referred to as perfusion edema.
Timing: up to 72 hours after transplant (after transplant, 24 hours, 48 hours, 72 hours)
Parameters:
(1) pulmonary infiltrates on chest X-ray
(2) ratio of PaO2 to FIO2
X-Ray Appearance
Ratio PaO2 to FIO2
Grade
not consistent with pulmonary edema
> 300
0
consistent with pulmonary edema
> 300
1
consistent with pulmonary edema
200 to 300
2
consistent with pulmonary edema
< 200
3
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