The Snyder Classification of Superior Labrum Anterior and Posterior (SLAP) Lesions

Intraobserver and Interobserver Reliability of the Snyder and Expanded SLAP Classification System: A Video Study

Background

Superior labral anterior and posterior (SLAP) tears are a common finding in overhead athletes. The original classification system produced by Snyder in 1990 contained 4 types of SLAP tears and was later expanded to 10 types. The classification has been challenging because of inconsistencies between surgeons making diagnoses and treatments based on the diagnosis. Furthermore, patient factors-such as age and sports played-affect the treatment algorithms, even across similarly classified SLAP tears.

Purpose

To (1) assess the interobserver and intraobserver reliability of the Snyder and expanded SLAP (ESLAP) classification systems and (2) determine the consistency of treatment for a given SLAP tear depending on different clinical scenarios.

Study Design

Cohort study (diagnosis); Level of evidence, 3.

Methods

A total of 20 arthroscopic surgical videos and magnetic resonance imaging scans of patients with SLAP tears were sent to 20 orthopaedic sports medicine surgeons at various stages of training. Surgeons were asked to identify the type of SLAP tear using the Snyder and ESLAP classifications. Surgeons were then asked to determine the treatment for a SLAP tear using 4 clinical scenarios: (1) in the throwing arm of an 18-year-old pitcher; (2) in the dominant arm of an 18-year-old overhead athlete; (3) a 35-year-old overhead athlete; (4) or a 50-year-old overhead athlete. Responses were recorded, and the cases were shuffled and sent back 6 weeks after the initial responses. Results were then analyzed using the Fleiss kappa coefficient (κ) to determine interobserver and intraobserver degrees of agreement.

Results

There was moderate intraobserver reliability in both the Snyder and ESLAP classifications (κ = 0.52) and fair interobserver reliability for both classification systems (Snyder, κ = 0.31; ESLAP, κ = 0.30; P < .0001) among all surgeons. Additionally, there was only fair agreement (κ = 0.30; P < .0001) for the treatment modalities chosen by the reviewers for each case.

Conclusion

This study demonstrated that SLAP tears remain a challenging problem for orthopaedic surgeons in diagnostics and treatment plans. Therefore, care should be taken in the preoperative discussion with the patient to consider all the possible treatment options because this may affect the postoperative recovery period and patient expectations.

Recurrence in traumatic anterior shoulder dislocations increases the prevalence of Hill-Sachs and Bankart lesions: a systematic review and meta-analysis

PURPOSE

The extent of shoulder instability and the indication for surgery may be determined by the prevalence or size of associated lesions. However, a varying prevalence is reported and the actual values are therefore unclear. In addition, it is unclear whether these lesions are present after the first dislocation and whether or not these lesions increase in size after recurrence. The aim of this systematic review was (1) to determine the prevalence of lesions associated with traumatic anterior shoulder dislocations, (2) to determine if the prevalence is higher following recurrent dislocations compared to first-time dislocations and (3) to determine if the prevalence is higher following complete dislocations compared to subluxations.

METHODS

PubMed, EMBASE, Cochrane and Web of Science were searched. Studies examining shoulders after traumatic anterior dislocations during arthroscopy or with MRI/MRA or CT published after 1999 were included. A total of 22 studies (1920 shoulders) were included.

RESULTS

The proportion of Hill-Sachs and Bankart lesions was higher in recurrent dislocations (85%; 66%) compared to first-time dislocations (71%; 59%) and this was statistically significant (P < 0.01; P = 0.05). No significant difference between recurrent and first-time dislocations was observed for SLAP lesions, rotator-cuff tears, bony Bankart lesions, HAGL lesions and ALPSA lesions. The proportion of Hill-Sachs lesions was significantly higher in complete dislocations (82%) compared to subluxations (54%; P < 0.01).

CONCLUSION

Higher proportions of Hill-Sachs and Bankart were observed in recurrent dislocations compared to first-time dislocations. No difference was observed for bony Bankart, HAGL, SLAP, rotator-cuff tear and ALPSA. Especially when a Hill-Sachs or Bankart is present after first-time dislocation, early surgical stabilization may need to be considered as other lesions may not be expected after recurrence and to limit lesion growth. However, results should be interpreted with caution due to substantial heterogeneity and large variance.

LEVEL OF EVIDENCE

IV.

Diagnostic utility of the Active Compression Test for the superior labrum anterior posterior tear: A systematic review

BACKGROUND

The Active Compression Test has been proposed to have high diagnostic accuracy for superior labrum anterior to posterior tears. The aim of this systematic review was to compile the available evidence for this test and evaluate its diagnostic accuracy.

METHODS

The databases PubMed, Embase, Cochrane, CINAHL, and SCOPUS were searched for case control, diagnostic studies that evaluated the Active Compression Test between 1999 (date of test introduction) and February 2018. Two independent review authors screened the search results, assessed the risk of bias using QUADAS-2, and extracted the data.

RESULTS

Eighteen studies (pooled sample = 3091) were included in this review. Twelve out of 18 studies either had high or unclear risk of bias (66.6%). Results from the pooled analysis of all 18 studies provided that the Active Compression Test is more sensitive (71.5: 95% CI = 68.8, 74.0) than specific (51.9: 95% CI = 50.7, 53.1) and only marginally influenced posttest probability from a pretest probability of 31.7-40.72% with a positive finding and a pretest probability of 31.7-20.33% with a negative finding.

DISCUSSION

The Active Compression Test has both limited screening and confirmation ability; therefore, we do not advocate for its use in clinical decision making.

Trends in the Management of Isolated SLAP Tears in the United States

Background:

The management of superior labrum anterior and posterior (SLAP) tears remains controversial, with surgical treatment options including SLAP repair, debridement, and open or arthroscopic biceps tenodesis (BT), based on patient factors and the type of tear.

Hypothesis:

We hypothesized that SLAP repair has become less frequently performed over time, while BT is more frequently performed, particularly in patients ≥ 40 years.

Study Design:

Descriptive epidemiology study.

Methods:

A retrospective query was performed using the Humana insurance database from years 2007 to 2016. For the management of a SLAP tear diagnosis (International Classification of Diseases–Ninth Edition [ICD-9] code: 840.7), independent and exclusive cohorts were formed using Current Procedural Terminology (CPT) codes for debridement (29822, 29823), SLAP repair (29807), open or arthroscopic BT (29828, 23430), and SLAP repair combined with BT (29828 OR 23430 AND 29807).

Results:

Of 46,650 diagnoses of a SLAP tear, there were 3347 patients who underwent operative management for an isolated SLAP tear from 2007 to 2016. There was a linear increase of SLAP tear diagnoses per year (r² = 0.800, P < .001) during this period. Overall, SLAP repair was performed in 1629 patients (48.7%), debridement was performed in 1076 patients (32.1%), BT was performed in 552 patients (16.5%), and combined SLAP repair and BT was performed in 90 patients (2.7%). There was a 69.3% decrease in isolated SLAP repair from 2007 to 2016 (r² = 0.882, P < .001). BT for the diagnosis of an isolated SLAP tear increased by 370.0% over the same period (r² = 0.800, P < .001). SLAP repair had an equivalent percentage of being performed in patients both older and younger than 40 years (P = .218). There was a 1500.0% increase in BT performed in patients older than 40 years during the study period. There were no statistical differences in the postoperative incidence of stiffness, surgical site infections, and reoperations between all surgical treatment groups (P > .05).

Conclusion:

An analysis of a large private-payer database revealed that surgical treatment of isolated SLAP tears in the United States has shifted from 2007 to 2016, with an increase in the frequency of BT and a decline in the frequency of SLAP repair, particularly in patients older than 40 years.

Treatment of SLAP Lesions

Background:

The surgical treatment of a Superior Labrum Anterior and Posterior (SLAP) lesion becomes more and more frequent as the surgical techniques, the implants and the postoperative rehabilitation of the patient are improved and provide in most cases an excellent outcome.

Objective:

However, a standard therapy of SLAP lesions in the shoulder surgery has not been established yet. An algorithm on how to treat SLAP lesions according to their type and data on the factors that influence the surgical outcome is essential for the everyday clinical practice.

Method:

In this article, a retrospective evaluation of patients with SLAP lesion, treated surgically in our orthopaedic clinic was conducted.

Results:

According to the clinical outcome and our experience with the surgical therapy of SLAP lesions we demonstrate an algorithm on the proper therapeutic approach.

Conclusion:

SLAP I lesions are treated with debridement. Most controversies concern patients with SLAP II lesions, whose therapy is either fixation of the superior labrum or tenotomy/tenodesis of the long head of the biceps tendon. For patients with SLAP III or IV lesions the most commonly accepted approach is tenotomy or tenodesis of the long head of biceps tendon.