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Wilson Score for Prediction of Difficult Intubation

 

Input
 

Weight		gm kg lb
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
 
Important: Inputs must be complete to perform calculation.

 

Wilson Score		# count index logit none number points 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
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

 

Associated Medical Subject Headings [MeSH]
 

Adult,   Anthropometry,   Head,   Humans,   Intratracheal,   Intubation,   Laryngoscopy,   Larynx,   Middle Aged,   Neck,   Prospective Studies,   Risk Factors

 

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      79348-9 : kg      8335-2 : kg      75292-3 : kg      3142-7 : 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.