Meta-analysis of Noninsertional Achilles Tendinopathy

Achilles Pain, Stiffness, and Muscle Power Deficits: Midportion Achilles Tendinopathy Revision - 2024

The Academy of Orthopaedic Physical Therapy (AOPT) has an ongoing effort to create evidence-based clinical practice guidelines (CPG) for orthopaedic physical therapy management of patients with musculoskeletal impairments described in the World Health Organization's International Classification of Functioning, Disability, and Health (ICF). The 2024 Achilles Pain, Stiffness, and Muscle Power Deficit: Midportion Achilles Tendinopathy Clinical Practice Guideline (CPG) is a revision of the 2018 CPG and represents the third CPG from AOPT on this topic. The goals of the revision were to provide a concise summary of the contemporary evidence and to develop new recommendations or revise previously published recommendations to support evidence-based practice. This current CPG covers prevalence, pathoanatomical features, risk factors, clinical course, diagnosis, examination, imaging, and physical therapy interventions for the management of midportion Achilles tendinopathy. J Orthop Sports Phys Ther 2024;54(12):CPG1-CPG32. Epub 27 November 2024. doi:10.2519/jospt.2024.0302.

Excellent Clinical Outcomes and Rapid Return to Activity Following In-Office Needle Tendoscopy for Chronic Achilles Tendinopathy

Purpose

To assess outcomes following Achilles in-office needle tendoscopy (IONT) for the treatment of chronic Achilles tendinopathy (cAT) at a minimum 12-month follow-up.

Methods

A retrospective case series was conducted to evaluate patients who underwent Achilles IONT for cAT between January 2019 and December 2022. Inclusion criteria were patients ≥18 years of age and clinical history, physical history, and magnetic resonance imaging findings consistent with cAT who did not respond to a minimum of 3 months of conservative management for which each patient underwent Achilles IONT and had a minimum 12-month follow-up. Clinical outcomes were evaluated using the Victorian Institute of Sport Assessment-Achilles and visual analog scale scores. Patient satisfaction was measured at the final follow-up visit with a 5-point Likert scale.

Results

Twelve patients (13 Achilles) with a mean age of 50.9 ± 14.6 years were included in the study. The mean follow-up time was 26.3 ± 6.3 months. The mean Victorian Institute of Sport Assessment-Achilles scores improved from a preoperative score of 35.6 ± 5.9 to a postoperative score of 83.6 ± 14.1 (P < .001). The mean visual analog scale score improved from a preoperative score of 6.6 ± 1.0 to a postoperative score of 1.3 ± 1.7 (P < .001). There were 10 patients (83.3%) who participated in sports activities before the IONT procedure. Within this group, 9 patients (90.0%) returned to play at a mean time of 5.9 ± 2.6 weeks. The mean time to return to work was 4.2 ± 1.2 days. Patients reported an overall positive IONT experience with a mean rating scale of 4.5 ± 0.9.

Conclusions

This retrospective review demonstrated that Achilles IONT for the treatment of cAT results in significant improvements in subjective clinical outcomes and a low complication rate together with high patient satisfaction scores at short-term follow-up.

Level of Evidence

Level IV, therapeutic case series.

Gastrocnemius Release in the Treatment of Achilles Tendinopathy: A Systematic Review

Background

The aim of this study is to evaluate the use of isolated gastrocnemius release in the treatment of Achilles tendinopathy. The primary outcome is the change in patient-reported pain outcomes. Secondary outcomes include the change in patient-reported foot and ankle function, ankle range of motion and strength, patient satisfaction and rate of surgical complications.

Methods

A systematic review was undertaken of studies involving patients treated with an isolated gastrocnemius release for Achilles tendinopathy. Randomised controlled trials, cohort studies, case-control studies and case series were eligible and identified from the following databases: MEDLINE and EMBASE.

Results

Isolated gastrocnemius release results in improved patient-reported outcome scores for pain and foot and ankle function. There is an increase in ankle range of motion but a reduction in ankle strength. Patients report a high rate of overall satisfaction. The most common surgical complications are sural nerve injury and wound infection.

Conclusions

Isolated gastrocnemius release may offer maintained and clinically meaningful improvements in pain and foot and ankle function with an associated reduction in ankle strength.

Current concept review of Achilles tendinopathy

Achilles tendinopathy is a common overuse injury affecting the ankle and foot. It manifests as a clinical condition that includes pain, edema, and decreased functionality. This condition can be broadly categorized into two main types based on anatomical location: insertional and noninsertional tendinopathy. The development of Achilles tendinopathy involves various factors, both internal and external. Patients with Achilles tendinopathy often experience stiffness worsened by prolonged rest, and pain exacerbated by physical activity. These symptoms can limit work activity and sports participation, with many patients facing discomfort while wearing shoes due to heel sensitivity. Diagnosis is primarily clinical, although MRI and ultrasound imaging can aid in differential diagnosis. Identifying risk factors and understanding the patient's biomechanics assist in accurate diagnosis and subsequent management. Management of Achilles tendinopathy involves a range of conservative and surgical options. However, due to varying results in clinical studies, a definitive gold standard treatment has not emerged. Eccentric exercises are a valuable tool in managing the condition. The recommend treatments such as shock wave therapy or nitric oxide patches are sought if symptoms do not improve. Peritendinous injections could be options if physical therapy proves ineffective. Surgical intervention is required after six months of conservative treatment. Recent research on Achilles tendinopathy emphasizes the need for individualized treatment plans that address its multifaceted nature. Combining biomechanical analysis, advanced imaging, and patient-specific factors is key to achieving optimal outcomes. Additionally, preventive strategies focusing on proper training techniques, load management, and addressing modifiable risk factors play a critical role in reducing the incidence of this condition. In conclusion, this article provides a current overview of Achilles tendinopathy. It highlights the importance of a comprehensive approach to understanding its causes, pathophysiology, diagnosis, and management strategies.

Cell-free fat extract-loaded microneedles attenuate inflammation-induced apoptosis and mitochondrial damage in tendinopathy

Existing clinical treatments for tendinopathy mainly focus on reducing pain, whereas inhibiting or reversing disease progression remains challenging. Local therapeutic drugs, such as glucocorticoids, cause adverse effects on the metabolism of tendon tissues and injection-related complications. Therefore, new administration modalities for tendinopathy need to be developed. In this study, we designed a hydrogel-based microneedle (MN) system for the long-term transdermal delivery of our novel biological cell-free fat extract (CEFFE) to treat tendinopathies. We found that CEFFE-loaded MNs (CEFFE-MNs) had good biosafety and inhibited lipopolysaccharide (LPS)-induced apoptosis and matrix degradation in Achilles tendon cells of rats. The Achilles tendons of rats returned to their maximum mechanical strength after applying CEFFE-MNs. The administration of CEFFE-MNs had better anti-apoptosis and tendon repair-promoting effects than CEFEF injections in vivo. Transcriptome sequencing indicated that the anti-apoptosis effect of CEFFE-MNs was highly related to tumor necrosis factor (TNF) signaling. CEFFE-MNs inhibited the expression of TNF, TNF receptor 1, and downstream nuclear factor-kappa B signaling. Additionally, CEFFE-MNs rescued LPS-induced mitochondrial dynamics in tendon cells via the TNF-Drp1 axis. Our study reports a novel CEFFE-MN system that exhibits long-term anti-inflammatory and anti-apoptotic effects, suggesting it as a new treatment route for tendinopathy with broad clinical translation prospects.

Achilles Tendinopathy Pathogenesis and Management: A Narrative Review

The Achilles tendon is the thickest and strongest tendon of the human body, and it is frequently injured during sports activity. The incidence of Achilles tendon pathologies has increased over recent decades, especially in the last few years, because of increased sports participation among the general population and due to the diffusion of competitive sports at a high level. Tendinopathies are common in athletes and in middle-aged overweight patients. The term "tendinopathy" refers to a condition characterised clinically by pain and swelling, with functional limitations of tendon and nearby structures, and consequently to chronic failure of healing response process. Tendinopathies can produce marked morbidity, and at present, scientifically validated management modalities are limited. Despite the constantly increasing interest and number of studies about Achilles tendinopathy (AT), there is still not a consensual point of view on which is the best treatment, and its management is still controversial. AT can be treated conservatively primarily, with acceptable results and clinical outcomes. When this approach fails, surgery should be considered. Several surgical procedures have been described for both conditions with a relatively high rate of success with few complications and the decision for treatment in patients with AT should be tailored on patient's needs and level of activity. The aim of this article is to give insights about the pathogenesis and most used and recent treatment options for AT.

Clinical Outcomes of Transarterial Embolization for Chronic Achilles Tendinopathy Refractory to Conservative Treatment: A Pilot Study

PURPOSE

To evaluate the effectiveness and safety of transarterial embolization (TAE) for chronic Achilles tendinopathy (AT) refractory to conservative treatment.

MATERIALS AND METHODS

This retrospective study included 20 patients (12 men and 8 women; mean age, 30.3 years) who received TAE using imipenem/cilastatin sodium for refractory chronic AT from May 2019 to April 2021. Nine patients had bilateral involvement. A total of 29 procedures were performed (8 for nonathletes and 21 for athletes). If feasible, embolization was performed superselectively of the arterial branch demonstrating hypervascularity, early venous drainage, and/or supplying the pain site noted using a radiopaque marker. The visual analog scale (VAS, 0-10) score was used to assess pain symptoms at baseline and during the follow-up period (1 day; 1 week; 1, 3, and 6 months; and open period). Clinical success was defined as a decrease of >50% in the VAS score at 6 months when compared with baseline.

RESULTS

In 25 (86.2%) of 29 procedures, clinical success was achieved. Significant decreases in the VAS scores were noted at 1 day, 1 week, 1 month, 3 months, and 6 months (6.86 at the baseline vs 3.48, 3.41, 3.10, 2.55, and 1.62, respectively; all P < .01). For patients available for the 12- and 24-month follow-ups (n = 19 and 6, respectively), the mean VAS scores significantly decreased (6.84 vs 2.00 and 7.33 vs 1.17, respectively; all P < .01). No serious adverse events were observed during follow-up.

CONCLUSIONS

TAE may alleviate pain for patients with chronic AT refractory to the conservative treatment with a low risk of adverse events.

Neuromuscular and structural tendon adaptations after 6 weeks of either concentric or eccentric exercise in individuals with non-insertional Achilles tendinopathy: protocol for a randomised controlled trial

INTRODUCTION

There is limited evidence on the neural strategies employed by the central nervous system to control muscle force in the presence of non-insertional Achilles tendinopathy (NIAT). Additionally, the neuromuscular mechanisms by which exercise may help to resolve tendon pain remain unclear.

OBJECTIVE

This study aims to first establish changes in the gastrocnemius-soleus motor unit firing properties after applying a training protocol of 6 weeks based on either controlled eccentric or concentric contractions in individuals with NIAT. Second, we want to determine changes in the level of pain and function and mechanical and structural properties of the Achilles tendon after applying the same training protocol. Additionally, we want to compare these variables at baseline between individuals with NIAT and asymptomatic controls.

METHODS AND ANALYSIS

A total of 26 individuals with chronic (>3 months) NIAT and 13 healthy controls will participate in the study. Individuals with NIAT will be randomised to perform eccentric or concentric training for 6 weeks. Motor unit firing properties of the medial gastrocnemius, lateral gastrocnemius and soleus muscles will be assessed using high-density surface electromyography, as well as Achilles tendon length, cross-sectional area, thickness and stiffness using B-mode ultrasonography and shear wave elastography. Moreover, participants will complete a battery of questionnaires to document their level of pain and function.

ETHICS AND DISSEMINATION

Ethical approval (ERN-20-0604A) for the study was obtained from the Science, Technology, Engineering and Mathematics Ethical Review Committee of the University of Birmingham. The results of the study will be published in peer-review journals.

TRIAL REGISTRATION NUMBER

ISRCTN46462385.

The Effectiveness of Extracorporeal Shockwave Therapy for Midportion Achilles Tendinopathy: A Systematic Review

Achilles tendinopathy is one of the most common lower limb injuries in both athletes and the general population. Despite the plethora of conservative treatment options available for the management of Achilles tendinopathy, as many as one in four patients will go on to require surgery. Extracorporeal shockwave therapy (ESWT) has emerged as a promising treatment option and has been successful in the management of other common musculoskeletal injuries such as plantar fasciitis. However, the evidence for ESWT in the management of Achilles tendinopathy remains inconclusive. Therefore, the aim of this systematic review was to evaluate the current evidence for the use of ESWT in the management of midportion Achilles tendinopathy.

A comprehensive literature search was conducted using the databases MEDLINE (Pubmed), AMED, EMBASE, CINAHL, and CENTRAL. The databases were searched from their inception to December 2021. This was conducted to identify randomised control trials (RCTs) evaluating the effectiveness of ESWT versus control treatment in the management of midportion Achilles tendinopathy.

Following a comprehensive search of the literature, a total of 283 articles were identified. Following the screening of titles and abstracts, 236 articles were excluded. The main reasons for exclusion were the identification of duplicates, non-randomised studies, and the use of ESWT on other pathology. Following the exclusion of 236 articles, 47 articles were retrieved for full-text review. Of these 47 articles, 40 were excluded leaving a total of 7 RCTs eligible for inclusion in this review. There was consistent evidence from 4 RCTs that ESWT is effective in the management of midportion Achilles tendinopathy.

This review suggests that ESWT is a safe and effective modality for treating midportion Achilles tendinopathy as it reduces pain and improves function. The best available evidence suggests that a combination of ESWT with eccentric exercises and stretching may be even more effective than ESWT alone. Further research is required to confirm this and to determine the optimum ESWT treatment protocol.

The Statistical Fragility of Platelet-Rich Plasma as Treatment for Chronic Noninsertional Achilles Tendinopathy: A Systematic Review and Meta-analysis

Background:

Randomized controlled trial (RCT) outcomes reaching statistical significance, frequently determined by P <.05, are often used to guide decision making. Noted lack of reproducibility of some RCTs has brought special attention to the limitations of this approach. In this meta-analysis, we assessed the robustness of RCTs evaluating platelet-rich plasma (PRP) for the treatment of chronic noninsertional Achilles tendinopathy (AT) by using fragility indices.

Methods:

The present study was a systematic review and meta-analysis of RCTs comparing outcomes after PRP injection vs alternative treatment in patients with AT. Representative data sets were generated for each reported continuous outcome event using summary statistics. Fragility indices refer to the minimal number of patients whose status would have to change from a nonevent to an event to turn a statistically significant result into a nonsignificant result, or vice versa. The fragility index (FI) and continuous FI (CFI) were determined for dichotomous and continuous outcomes, respectively, by manipulating each data set until reversal of significance (a=0.05) was achieved. The corresponding fragility quotient (FQ) and continuous FQ (CFQ) were calculated by dividing FI/CFI by sample size.

Results:

Of 432 studies screened, 8 studies (52 outcome events) were included in this analysis. The 12 dichotomous outcomes had a median FI of 4.5 (FQ: 0.111), and the 40 continuous outcomes had a median CFI of 5 (CFQ: 0.154). All 52 outcome events included lost-to-follow-up data, and 12 (23.1%) indicated a greater number of patients lost to follow-up than the FI or CFI.

Conclusion:

Our findings suggest that RCTs evaluating PRP for AT therapy lack statistical robustness, because changing only a small number of events may alter outcome significance.

Level of Evidence:

Level II, therapeutic study.

Patient reported outcomes and satisfaction following single incision Flexor Hallucis Longus (FHL) augmentation for chronic Achilles tendon pathologies

BACKGROUND

Various procedures exist to augment or reconstruct the Achilles tendon (AT) in patients suffering from chronic pathologies. The aim of this study is to assess patient reported outcomes and satisfaction following single incision FHL augmentation using a short tendon harvest with interference screw fixation.

METHODS

This is a multicentre case series where postoperative patient reported outcome and satisfaction scores were collected on 30 patients. Outcome measures included EQ-5D, EQ-VAS, Achilles Tendon Rupture Scores (ATRS), and satisfaction scores. Scores were also collected on the unaffected limbs for comparison.

RESULTS

Mean patient age was 61 years (range 40-79, SD 11). Mean EQ-5D index value was 0.750 (0.100-1.00, SD 0.238), and mean EQ-VAS score was 74 (36-99, SD 15), at a mean follow-up of 57 months (4-118, SD 32). For patients with ≥24 months' follow-up, a mean deficit of 16 ATRS points was found between the operated and unaffected limb. Overall satisfaction was over 86%. In cases of chronic AT rupture, younger age and increasing time from initial injury to surgery were predictors of greater residual deficit. No serious complications or failures occurred.

CONCLUSIONS

FHL augmentation using short tendon harvest and interference screw fixation is a safe treatment option. It appears to take at least 24 months to functionally recover following this procedure, and despite a residual function deficit, there is a high level of patient satisfaction. Further studies are required to determine optimal patient selection and timing of surgery.

Achilles Tendinopathy, A Brief Review and Update of Current Literature

ABSTRACT

Chronic pain in the Achilles tendon is a common problem in both athletes and nonathletes alike. The etiology for the development of Achilles tendinopathy has not been fully elucidated, and there remains multiple theories to explain the pain and dysfunction accompanying this condition. The diagnosis of Achilles tendon problems continues to rely on the clinical history and physical examination. The optimal management of pain, restoration of function, and return-to-sports participation with Achilles tendinopathy are evolving because of the advancement in technologies and research regarding its pathophysiology. This article aims to provide a brief review of the relevant anatomy, differential diagnosis, imaging findings, and an update of the literature on conservative and minimally invasive managements of chronic Achilles tendinopathy.

Functional Outcomes of Insertional Achilles Tendinopathy Treatment: A Systematic Review

BACKGROUND

Achilles tendinopathy is a common clinical problem that can be either insertional or noninsertional, and effective treatment of each type can vary. We sought to investigate the current evidence on different treatment methods for insertional Achilles tendinopathy with a focus on functional outcomes.

METHODS

We performed a systematic review of the available literature using the PubMed/MEDLINE and Cochrane Central Register of Controlled Trials databases. Data from included studies were categorized according to treatment method and reported with respect to functional outcomes and complications.

RESULTS

A total of 1,457 abstracts were reviewed; 54 studies with 2,177 patients met the inclusion criteria. Among the 54 studies, 6 operative techniques and 6 nonoperative treatments were evaluated.

CONCLUSIONS

Eccentric exercises and low-energy extracorporeal shockwave therapy (ESWT) have the greatest evidence for the initial management of insertional Achilles tendinopathy. ESWT has been increasingly studied in recent years, but more high-quality evidence is needed. Operative treatment with tenotomy, debridement, retrocalcaneal bursectomy, and calcaneal exostectomy is effective. Flexor hallucis longus tendon transfer may benefit cases of more severe disease. Minimally invasive procedures have a potential role in the treatment algorithm and require more rigorous study.

LEVEL OF EVIDENCE

Therapeutic Level IV. See Instructions for Authors for a complete description of levels of evidence.

Focused Extracorporeal Shockwave Therapy in Physical Medicine and Rehabilitation

Purpose of Review

Focused extracorporeal shockwave therapy (fESWT) is a physical treatment modality developed over the last 25 years for musculoskeletal indications. It has many indications in the field of physical medicine and rehabilitation (PM&R) and is effective, time-efficient, and cost-efficient. This review focuses on basics and on clinical indications as well as on significant trends in fESWT.

Recent Findings

In PM&R, stimulation of healing processes in tendons, surrounding tissue, and bones via mechanotransduction seems to be a relevant biological effect. The International Society for Medical Shockwave Treatment (ISMST) describes different types of indications (such as approved standard indications—in accordance with most scientific evidence—like calcifying tendinopathy of the shoulder, plantar fasciitis lateral epicondylopathy of the elbow, greater trochanter pain syndrome, patellar tendinopathy, Achilles tendinopathy and bone non-union, common empirically tested clinical uses, exceptional or expert indications, and experimental indications).

Summary

fESWT is a relevant treatment option in PM&R and regenerative medicine. In recent years, historical paradigms (for example, application in cancer patients) have changed and new indications (such as nerve regeneration, myofascial trapezius syndrome, low back pain, dermatosclerosis, and lymphedema) are supported. Future translational research should focus on establishing actual exceptional indications and experimental indications for clinical routine.