Donati et al modified the Johns Hopkins classification of surgical procedures. The original classification had 5 levels while the modified version was reduced to 3.
Patient selection: preoperative assessment
(1) risk independent of anesthesia
(2) invasiveness of procedure
(3) potential blood loss
(4) planned ICU care
minimal to mild
minimal to moderate
< 500 mL
moderate to significant
500 to 1,500 mL
major to critical
Exclusions for Grade 1: open exposure of internal organs; vascular repair; neurosurgery; placement of prosthetic device; resection of major body organ; planned postoperative monitoring
Exclusions for Grade 2: open thoracic surgery; intracranial; major vascular surgery (aortofemoral bypass); planned ICU care
To read more or access our algorithms and calculators, please log in or register.