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  Wilson Score for Predicition of Difficult Intubation

 
Input
 
Weight  
C Spine Mobility   degrees
Jaw Mobility IG ≥5 cm or normal ability to protrude lower teeth beyond upper (0)

IG <5 cm and can only protrude lower teeth to level of upper (1)

IG <5 cm and unable to protrude lower teeth to meet upper (2)
Retrognathia None (0)

Moderare (1)

Severe (2)
Prominent Incisors None (0)

Moderate (1)

Severe (2)

 
Result
 
 
Wilson Score  
 

 
     
 
Include literature references: Yes   No

 
  Wilson Score Interpretation

 
0 to 1 point: No added difficulty
2 to 3 points: Difficult intubation (72-75% sensitivity)
4 to 10 points: Difficult intubation (36-42% sensitivity)

 
 
Notes
  • IG: interincisor gap.

 
Equations used
 
WilsonScore = WeightFactor + CSpineMobilityFactor + JawMobility + Retrognathia + ProminentIncisors

 
Calculation Details and Variables
  • WeightFactor is assigned values by this ordered logic:
    • If Weight >110 kg WeightFactor = 2
    • Else if Weight ≥90 kg WeightFactor = 1
    • Else WeightFactor = 0.
  • CSpineMobilityFactor is assigned values by this ordered logic:
    • If C Spine Mobility <90 degrees CSpineMobilityFactor = 2
    • Else if C Spine Mobility >90 degrees CSpineMobilityFactor = 0
    • Else CSpineMobilityFactor = 1.
  • Equation parameters such as Jaw Mobility, have two or more discrete values that may be used in the calculation. The numbers in the parentheses, e.g. (0), represent the values that will be used.

 
References
  1. Wilson ME, Spiegelhalter D, Robertson JA, Lesser P. Predicting difficult intubation. Br J Anaesth. 1988 Aug;61(2):211-6. PubMed ID: 3415893 PubMed Logo
  2. Detsky ME, Jivraj N, Adhikari NK, et al. Will This Patient Be Difficult to Intubate?: The Rational Clinical Examination Systematic Review. JAMA. 2019 Feb 5;321(5):493-503. PubMed ID: 32207774 PubMed Logo

 
Associated Logical Observation Identifiers Names and Codes [LOINC]
 
Parameter LOINC's and Suggested Units
Weight 29463-7 : kg      3141-9 : kg      8350-1 : kg      8351-9 : kg      

 
This material contains content from LOINC® (http://loinc.org). The LOINC table, LOINC codes, and LOINC panels and forms file are copyright © 1995-2014, Regenstrief Institute, Inc. and the Logical Observation Identifiers Names and Codes (LOINC) Committee and available at no cost under the license at http://loinc.org/terms-of-use.

 
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