Description

Bai et al reported a nomogram for predicting cardiovascular morbidity in a patient undergoing pheochromocytoma surgery. The authors are from China Medical University in Shenyang, China.


Patient selection: pheochromocytoma surgery

 

Parameters:

(1) body mass index (BMI) in kg per square meter, from 12 to 40

(2) intraoperative hemodynamic instability (IHD)

(3) coronary heart disease (CHD)

(4) tumor size in cm, from 0 to 18

(5) use of crystalloid and/or colloid

 

points for BMI =

= 142.86 - (3.57 * (BMI))

 

points for tumor size =

= 2.389 * (cm)

 

Parameter

Finding

Points

IHD

no

0

 

yes

23.5

CHD

no

0

 

yes

12

crystalloid and/or colloid

no

0

 

yes

11.5

 

total score =

= SUM(points for all of the parameters)

 

Interpretation:

• minimum score: 0

• maximum score: 190

 

value of X =

= (0.0751 * (score)) - 8.951

 

risk of cardiovascular morbidity =

= 1 / (1 + EXP((-1) * X))

 

Performance:

• The area under the ROC curve is 0.87.


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