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Predictive Model of Palazzo and Evans for Postoperative Nausea and Vomiting (PONV)

Description

Palazzo and Evans used logistic regression to identify the risk of postoperative nausea and vomiting (PONV) in surgical patients. This can help identify patients who may require more aggressive management and monitoring. The authors are from Charing Cross Hospital in London and Nuffield Department of Anaesthesia in Oxford.


 

Parameters:

(1) gender of the patient

(2) postoperative administration of opioids

(3) previous history of postoperative nausea and vomiting

(4) history of motion sickness

Parameter

Finding

Points

gender of the patient

male

0

 

female

1

postoperative opioid administration

no

0

 

yes

1

previous history PONV

no

0

 

yes

1

history of motion sickness

no

0

 

yes

1

 

X =

= (2.24 * (points for postoperative opioid administration)) + (3.97 * (points for history of PONV)) + (2.4 * (points for gender)) + (0.78 * (history of motion sickness)) - (3.2 * (points for gender) * (points for history of PONV)) - 5.03

 

probability of PONV =

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

 


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