Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
. 2024 Aug;32(8):2152-2160.
doi: 10.1002/ksa.12235. Epub 2024 May 8.

Instability Severity Index Score predicts recurrent shoulder instability after arthroscopic Bankart repair

Matthijs Y H van Blommestein  1 , Lonneke H M Govaert  1 , Job van der Palen  2   3 , Wiebe C Verra  1 , Rinco C T Koorevaar  4 , Femke F Schröder  1   5   6 , Egbert Jan D Veen  1
Affiliations

Instability Severity Index Score predicts recurrent shoulder instability after arthroscopic Bankart repair

Matthijs Y H van Blommestein et al. Knee Surg Sports Traumatol Arthrosc. 2024 Aug.

Abstract

Purpose: The Instability Severity Index (ISI) Score was developed to preoperatively assess the risk of recurrent shoulder instability after an arthroscopic Bankart repair. This study aims to validate the use of ISI Score for predicting the risk of recurrence after an arthroscopic Bankart repair in a heterogeneous population and proposes an appropriate cut-off point for treating patients with an arthroscopic Bankart repair or otherwise.

Methods: This study analysed 99 shoulders after a traumatic dislocation that underwent arthroscopic Bankart repair with at least 3 years follow-up. Patients were divided into subcategories based on their respective ISI Score. Recurrence includes either a postoperative dislocation or perceived instability.

Results: The overall recurrence rate was found to be 26.3%. A significant correlation was identified between ISI Score and the recurrence rate (odds ratio [OR]: 1.545, 95% confidence interval [CI]: 1.231-1.939, p < 0.001). Furthermore, ISI Score 4-6 (OR: 4.498, 95% CI: 1.866-10.842, p < 0.001) and ISI Score > 6 (OR: 7.076, 95% CI: 2.393-20.924, p < 0.001) both had a significantly higher risk of recurrence compared to ISI Score 0-3. In ISI Score subcategories 0-3, 4-6 and >6, the recurrence rate was, respectively, 15.4%, 40.7% and 71.4%.

Conclusion: ISI Score has predictive value in determining the recurrence risk of shoulder instability following an arthroscopic Bankart repair in a heterogeneous population. Based on the findings of this study, we recommend using arthroscopic Bankart repair in patients with ISI Score 0-3. Clinical and shared decision-making are essential in the group with ISI Score 4-6, since the recurrence rate is significantly higher than in patients with ISI Score 0-3. Arthroscopic Bankart repair is not suitable for patients with ISI Score > 6.

Level of evidence: Level III.

Keywords: Bankart repair; arthroscopy; instability; shoulder; surgery.

PubMed Disclaimer

References

REFERENCES

    1. Aboalata, M., Plath, J.E., Seppel, G., Juretzko, J., Vogt, S. & Imhoff, A.B. (2016) Results of arthroscopic Bankart repair for anterior‐inferior shoulder instability at 13‐year follow‐up. The American Journal of Sports Medicine, 45(4), 782–787. Available from: https://doi.org/10.1177/0363546516675145
    1. Ahmed, I., Ashton, F. & Robinson, C.M. (2012) Arthroscopic Bankart Repair and capsular shift for recurrent anterior shoulder instability. Journal of Bone and Joint Surgery, 94(14), 1308–1315. Available from: https://doi.org/10.2106/JBJS.J.01983
    1. Arciero, R.A., Wheeler, J.H., Ryan, J.B. & McBride, J.T. (1994) Arthroscopic Bankart repair versus nonoperative treatment for acute, initial anterior shoulder dislocations. The American Journal of Sports Medicine, 22(5), 589–594. Available from: https://doi.org/10.1177/036354659402200504
    1. Arner, J.W., Peebles, L.A., Bradley, J.P. & Provencher, M.T. (2020) Anterior shoulder instability management: indications, techniques, and outcomes. Arthroscopy: The Journal of Arthroscopic & Related Surgery, 36(11), 2791–2793. Available from: https://doi.org/10.1016/j.arthro.2020.09.024
    1. Balg, F. & Boileau, P. (2007) The instability severity index score. The Journal of Bone and Joint Surgery. British Volume, 89‐B11, 1470–1477. Available from: https://doi.org/10.1302/0301-620X.89B11.18962

Grants and funding