Rehabilitation for Shoulder Instability - Current Approaches

Current Concepts on the Management of Shoulder Instability in Throwing Athletes

PURPOSE OF REVIEW

The management of shoulder instability in throwing athletes remains a challenge given the delicate balance between physiologic shoulder laxity facilitating performance and the inherent need for shoulder stability. This review will discuss the evaluation and management of a throwing athlete with suspected instability with a focus on recent findings and developments.

RECENT FINDINGS

The vast majority of throwing athletes with shoulder instability experience subtle microinstability as a result of repetitive microtrauma rather than episodes of gross instability. These athletes may present with arm pain, dead arms or reduced throwing velocity. Recent literature reinforces the fact that there is no "silver bullet" for the management of these athletes and an individualized, tailored approach to treatment is required. While initial nonoperative management remains the hallmark for treatment, the results of rehabilitation protocols are mixed, and some patients will ultimately undergo surgical stabilization. In these cases, it is imperative that the surgeon be judicious with the extent of surgical stabilization as overtightening of the glenohumeral joint is possible, which can adversely affect athlete performance. Managing shoulder instability in throwing athletes requires a thorough understanding of its physiologic and biomechanical underpinnings. Inconsistent results seen with surgical stabilization has led to a focus on nonoperative management for these athletes with surgery reserved for cases that fail to improve non-surgically. Overall, more high quality studies into the management of this challenging condition are warranted.

The supine moving apprehension test-Reliability and validity among healthy individuals and patients with anterior shoulder instability

Background

Performance-based tests for patients with anterior shoulder dislocation are lacking. This study determined the reliability and validity of the supine moving apprehension test designed to assess the ability to control anterior instability loads.

Methods

Thirty-six participants were recruited (18 healthy individuals, and 18 patients following anterior shoulder dislocation). Healthy participants performed the supine moving apprehension test on 2 separate occasions to determine test-retest reliability. Patients completed the supine moving apprehension test and the Western Ontario Shoulder Instability index before and 6 months after surgical stabilization of their shoulder. The presence of anterior apprehension was also documented post-operatively.

Results

The supine moving apprehension test demonstrated good test-retest reliability (intraclass correlation coefficient = 0.74-0.84). Patients performed 18-30 repetitions less than healthy individuals during the supine moving apprehension test (P < 0.01). A strong correlation was found between supine moving apprehension test scores and Western Ontario Shoulder Instability post-operatively (r = -0.74, P ≤ 0.01). Supine moving apprehension test scores significantly improved among patients following surgery (P < 0.01). Patients with a negative apprehension test post-operatively performed the supine moving apprehension test significantly better than patients with a positive apprehension test (P < 0.01).

Conclusions

The supine moving apprehension test is reliable and valid among patients with anterior shoulder dislocation and may serve to assess patients' ability to control shoulder anterior instability loads.

The Modified Tampa-Scale of Kinesiophobia for Anterior Shoulder Instability

Purpose

To assess content validity and to modify the Tampa Scale of Kinesiophobia (TSK) to make it suitable for application in patients with anterior shoulder instability.

Methods

A four-round Delphi method was performed to establish expert consensus on developing the Tampa Scale of Kinesiophobia for patients with anterior shoulder instability (TSK-SI) using an expert group of Dutch shoulder-specialized orthopedic surgeons and physiotherapists. During round 1, experts were asked to score the 17 items of the original TSK on relevance and construction using the COSMIN guidelines. With this feedback, questions were reviewed and modified. During round 2, experts were asked to score the modified items. This process was repeated until consensus was established. Then, patients were asked to participate in a moderator-guided, three-step-test interview using a Web-based platform to assess the modified scale. Sessions were recorded and evaluated by the working group. The modified scale was finally adjusted on the basis of the input of these patients.

Results

Thirty Dutch shoulder experts were included, of which 25 completed all 4 rounds, after which consensus was established. One question was added to the modified scale based on feedback in round 1, establishing the 18-item TSK-SI. Sixteen patients with shoulder instability were included, which all completed the three-step test interview. Following this, question 4 (changed to present tense) and question 7 (hypothetical component added) were adjusted, resulting in the final TSK-SI.

Conclusions

This consensus modification of the TSK to TSK-SI can support the content validity of the instrument to assess kinesiophobia in patients with anterior shoulder instability. These modifications may improve the responsiveness and validity of the TSK-SI, as it does not match all the items of the original TSK.

Level of evidence

Level V, consensus statement.

Evaluating the Distribution, Quality, and Educational Value of Videos Related to Shoulder Instability Exercises on the Social Media Platform TikTok

BACKGROUND

Because of the lack of scientific oversight, the quality, applicability, and consistency of healthcare-related TikTok videos have become a focus of research exploration. The orthopaedic surgery literature lags behind other medical fields in analyzing the widespread utilization of TikTok videos for medical information delivery.

METHODS

TikTok was queried using the hashtag #shoulderstabilityexercises, and 109 videos were included. The videos were collected by two authors and independently evaluated using DISCERN (a well-validated informational analysis tool) and shoulder stability exercise education score (a self-designed tool for the evaluation of shoulder instability-related exercises).

RESULTS

DISCERN scores of videos uploaded by general users had significantly lower scores in all four categories than those uploaded by healthcare professionals (P < 0.001, P = 0.005, P = 0.002, and P < 0.001). For the shoulder stability exercise education score, general users had a significantly lower score than the healthcare professionals at 3.36 and 4.91 on a 25-point scale, respectively (P = 0.034). General users had more videos graded as very poor (84.2%) in comparison to the number of videos uploaded by healthcare professionals deemed very poor (51.5%). However, the remainder of healthcare professionals had their videos graded as poor (48.5%).

CONCLUSION

Despite slightly improved video quality from healthcare professionals, the overall educational of the videos related to shoulder instability exercises was poor.

Physical Therapy for the Treatment of Shoulder Instability

Shoulder instability is the separation of the humeral head from the glenoid. Injury to the static and dynamic stabilizers can result in instability. Anterior shoulder instability is the predominant form of instability. It is usually a result of trauma. Posterior shoulder instability often presents with an insidious onset of pain. Multidirectional instability of the shoulder is symptomatic laxity in more than one plane of motion. The primary goal of rehabilitation is to restore pain-free mobility, strength, and functioning. Rehabilitation implements range of motion and strengthening exercises to restore proprioceptive control and scapular kinematics.

Investigation on the Efficiency of the Closed Kinetic Chain and Video-Based Game Exercise Programs in the Rotator Cuff Rupture: A Randomized Trial

Objective: To examine the effectiveness of video-based game exercises and structured closed kinetic chain exercises in individuals with rotator cuff rupture. Materials and Methods: Forty-five individuals with rotator cuff rupture were included in this study. Individuals were randomly divided into three groups: a conventional exercise group (CEG), a structured closed kinetic chain exercise group (CKCEG), and a video-based game exercise group (VGEG). Interventions were performed twice a week for 6 weeks. Pain severity; pain threshold; disabilities of the arm, shoulder, and hand questionnaire (DASH); rotator cuff quality of life index (RCQOL); range of motion (ROM); and joint position sense and approximation force of all individuals were evaluated pre- and post-treatment. Results: There was a statistically significant difference in all values of the pre- and post-treatment of the groups (P < 0.05). When the differences between the groups were compared, CKCEG and VGEG values were more significant than CEG in all parameters (P < 0.017). Improvements in pain threshold, ROM in shoulder flexion and abduction, DASH score, and all parameters of the RCQOL questionnaire in VGEG were statistically more significant than CKCEG (P < 0.017). Conclusion: Individuals with rotator cuff rupture obtained more improvements in primary and secondary outcomes after closed kinetic chain exercise and video-based game exercise, rather than conventional methods. It was considered that video-based game exercise programs would be used in rotator cuff problems.

Does grip strength correlate with rotator cuff strength in patients with atraumatic shoulder instability?

Aim

To investigate if there is a correlation between grip strength (GS) and rotator cuff (RC) strength in patients with atraumatic shoulder instability (ASI) and to compare the relationship between these two measures with that previously published for a healthy population. Moreover, to determine if testing GS could be incorporated as a surrogate clinical assessment for RC strength in these patients.

Methods

A total of 20 subjects with ASI were included. Out of the 20 patients, eight presented with bilateral instability, which constituted a total of 28 atraumatic unstable shoulders (N = 28). GS was measured using a Jamar hand-dynamometer. External rotation (ER) and internal rotation (IR) strength was tested in inner and outer ranges using a hand-held dynamometer (HHD). Pearson’s correlation test was computed to investigate the relationship. Multiple linear regression was conducted to predict GS based on RC strength.

Results

Significant and strong positive correlations were found between GS and inner-range IR (r = 0.764, P < 0.001), inner-range ER (r = 0.611, P = 0.001), outer-range IR (r = 0.817, P < 0.001), and outer-range ER (r = 0.736, P < 0.001). A significant regression equation was found (F (4, 23) = 13.254, P < 0.001), with an R2 of 0.697 indicating that RC strength explained 69.7% of the variance in GS.

Conclusions

The results support the hypothesis showing that GS is strongly associated with RC strength in ASI patients. The simplicity of handgrip testing allows it to be used in clinical scenarios where sophisticated assessment tools are not available. GS is a convenient means to monitor patient progress during shoulder rehabilitation programs.

Management of atraumatic shoulder instability in physiotherapy (MASIP): a survey of physiotherapy practice

BACKGROUND

The impact of atraumatic shoulder instability (ASI) on patients can be extensive, its management complex, with a biopsychosocial approach recommended. Currently how physiotherapists manage ASI is unknown or the extent to which current clinical practice aligns with existing evidence. At the time of this study no national guidelines or consensus to direct practice existed.

METHODS

A cross-sectional electronic survey was distributed between July-September 2018, targeting UK-based physiotherapists managing shoulder pathology. Respondents were invited to describe their management of ASI, and rate their awareness and utilisation of various treatment techniques on a Likert-scale; median and interquartile ranges were calculated. Free text survey items were analysed using quantitative content analysis (QCA) to identify codes and categories. Means and percentages were calculated to summarise QCA and descriptive data.

RESULTS

Valid survey responses were analysed (n = 135). Respondents had between 2 and 39 years of physiotherapy experience (mean = 13.9 years); the majority (71.1 %) reported that ASI made up < 10 % of their caseload. Only 22.9 % (n = 31/135) of respondents reported feeling 'very confident' in managing ASI; the majority feeling 'somewhat confident' (70.4 %, n = 95/135) or 'not confident' (6.7 %, n = 9/135). The majority of respondents (59.3 %) used an ASI classification system, > 90 % citing the Stanmore Classification. Physiotherapists adapted their management according to clinical presentation, responding to differing biopsychosocial needs of the patient scenario. Most respondents (> 80 %) did not use a protocol to guide their management. Exercise was the most utilised management approach for ASI, followed by education; novel treatment strategies, including cortical rehabilitation, were also reported.

CONCLUSION

Findings indicate physiotherapists utilise a wide range of treatment strategies and respond to biopsychosocial cues when managing patients with ASI. The majority reported not being very confident in managing this condition, however only a minority use rehabilitation protocols to support their management. Some interventions that respondents reported using lacked evidence to support their use in ASI management and further research regarding effectiveness is required. Guidelines have been published since this survey; the impact of these will need evaluating to determine their effectiveness in the future.

Medical Interactive Recovery Assistant: a useful clinical tool in paediatric shoulder rehabilitation?

Background/aims

Outpatient physical therapy is the mainstay of treatment in shoulder instability, but lack of motivation and intermittent monitoring of progress is associated with poor compliance. ‘Exergames’ (a combination of videogames and physical exercise) may provide an additional or alternative motivational factor. The aim of this study was to determine the applicability of the Medical Interactive Recovery Assistant Xbox Kinect gaming software in the management of adolescent atraumatic shoulder instability.

Methods

Patients completed six 30-minute sessions playing games using the Medical Interactive Recovery Assistant while participating in a therapy programme. Pain and fatigue questionnaires, functional assessments and a framework analysis of free-text comments were used.

Results

A total of 20 female patients (15 unilateral, five bilateral pathology, mean age 14.1 years) completed the sessions. An average session length was 10.8 mins (range 0–24 mins). After each session using the Medical Interactive Recovery Assistant, 80% were neither in pain, nor overly tired. At 2 weeks, the Stanmore Percentage of Normal Shoulder Assessment scores had improved by a mean 17.9% and 10 (50%) patients showed improvements in Oxford Shoulder Instability Scores. Overall, 15 participants (75%) liked the technology; however six (32%) preferred standard physiotherapy, because of software limitations and lack of personal interaction.

Conclusions

Medical Interactive Recovery Assistant gamification is applicable for this patient cohort and could be integrated into adolescent atraumatic shoulder instability rehabilitation programmes; however, results emphasise the importance of personal contact.

The efficacy of a phone assistance nursing program for functional outcomes in patients after shoulder instability surgery: A protocol for randomized controlled trial

OBJECTIVE

We conduct this research protocol for the assessment of the effect of phone-assisted care programs on functional outcomes in patients receiving shoulder instability surgery.

METHODS

This is a randomized controlled, single center trial which will be implemented from October 2020 to December 2021. This trial is conducted according to the SPIRIT Checklist of randomized researches. It was authorized via the Ethics Committee of the First People's Hospital of Xiangyang city affiliated to Hubei Medical College (XY234-026). Ninety participants who undergo shoulder instability surgery are analyzed. Patients are randomly divided into control group (standard management group, with 45 patients) and study group (the phone program group, with 45 patients). In control group, the exercises at home are not monitored. Whereas in study group, patients are asked about their at-home activities, and the extra coaching sessions are provided to patients on self-care, exercise guidance, and the importance of exercise at home, and then answers to their questions. The primary outcome is the range of motion of the shoulder joint, and the pain arcs are determined through the range of motion. The extra assessments include the shoulder functional outcome, pain, and the quality of life. All the analysis needed in this study is implemented with SPSS (IBM, Chicago, USA) for Windows Version 19.0.

RESULTS

The clinical outcome variables between groups are shown in Table.

CONCLUSION

This investigation can offer a reliable basis for the effectiveness of phone assistance nursing program in patients after shoulder instability surgery.

TRIAL REGISTRATION NUMBER

researchregistry6010.

Subacromial space outlet in female patients with multidirectional instability based on hypermobile Ehlers-Danlos syndrome and hypermobility spectrum disorder measured by ultrasound

OBJECTIVE

The objective of the study was to compare the acromiohumeral distance (AHD) between patients diagnosed with hypermobility type of the Ehlers-Danlos syndrome (hEDS) or hypermobility spectrum disorder (HSD) and healthy controls by evaluating the relative amount the tendon occupies in the subacromial area. Furthermore, the aim was to evaluate if there was a change in AHD with arm elevation within and between groups.

METHODS

Twenty-nine female patients with hEDS/HSD (aged 34 ± 12.9 years) and 20 healthy controls (aged 33 ± 10.8 years) participated in the study. The supraspinatus tendon (SST) thickness and AHD were measured using ultrasound. The interplay between the SST and the AHD was expressed as the occupation ratio (OcAHD), calculated as the SST thickness as a percentage of AHD. The measures were performed in the resting position and in subsequently 45° and 60° of active arm elevation in the scapular plane.

RESULTS

The main finding is that patients with hEDS/HSD have a larger subacromial space outlet compared with the controls when measured by ultrasound. Furthermore, in both groups, we found an increased OcAHD during active arm elevation compared with the resting position, which indicates that similar mechanisms occur for patients with hEDS/HSD and healthy controls.

CONCLUSION

Patients with hEDS/HSD have a larger available subacromial space outlet compared with healthy individuals. OcAHD increased during active arm elevation compared with the resting position in both groups. This knowledge is important when designing rehabilitation exercise programs for shoulder instability patients with abnormal glenohumeral biomechanics.

Dispersion of helical axes during shoulder movements in young and elderly subjects

The shoulder complex (SC) consists of joints with little congruence and its active and passive structures ensure its stability. Stability of the SC rotation centre during upper arm movements can be estimated through the analysis of Helical Axes (HAs) dispersion. The aim of this study was to describe shoulder HAs dispersion during upper limb movements performed with dominant and non-dominant arms by young and elderly subjects. Forty subjects participated in the study (20 young: age 24.8 ± 2.8 years and 20 elderly: age 71.7 ± 6.3 years). Subjects were asked to perform four cycles of 15 rotations, flexions, elevations and abductions with one arm at a time at constant speed. Reflective markers were placed on participants' arms and trunk in order to detect movements and the HAs dispersion with an optoelectronic system. Mean Distance (MD) from the HAs barycenter and Mean Angle (MA) were used as HAs dispersion indexes. Young subjects showed significant lower MD compared to the elderly during all motion ranges of rotation, flexion and elevation (p < 0.001). Moreover, the MD was lower in the dominant arm compared to the contralateral for rotation (p = 0.049) and flexion (p = 0.019). The results may be due to joint degeneration described in elderly subjects and differences in neuromuscular control of SC stability.