The Instability Severity Index Score for Preoperative Evaluation of a Patient Requiring Anterior Shoulder Stabilisation

Description

Balg and Boileau developed the Instability Severity Index Score for evaluation patients requiring anterior shoulder stabilization. This can help to decide who can be managed arthroscopically and who may benefit from an open procedure. The authors are from the University of Nice-Sophia Antipolis in Nice, France.

Patient selection: need for anterior shoulder stabilization

Parameters:

(1) age in years

(2) pre-operative level of sports participation

(3) pre-operative type of sport

(4) shoulder laxity

(5) Hill-Sachs lesion in external rotation on AP radiograph

(6) loss of sclerotic inferior glenoid contour on AP radiograph

Parameter	Finding	Points
age in years	<= 20 years of age	2
	> 20 years of age	0
level of sports participation	none	0
	recreational	0
	competitive	2
type of sport	contact or forced overhead	1
	other	0
shoulder laxity	normal	0
	hyperlaxity (anterior or inferior)	1
Hills-Sachs lesion in external rotation	not visible	0
	visible	2
loss of inferior glenoid contour	no	0
	yes	2

total score =

= SUM(points for all 6 parameters)

Interpretation:

• minimum score: 0

• maximum score: 10

• A score > 6 was associated with a recurrence risk of 70% after arthroscopic surgery. The authors recommend a Bristow-Latarjet procedure for these patients.

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The Instability Severity Index Score for Preoperative Evaluation of a Patient Requiring Anterior Shoulder Stabilisation

Description

Specialty