Achilles Tendon Repair Research Articles

Open and Percutaneous Approaches Have Similar Biomechanical Results for Primary Midsubstance Achilles Tendon Repair: A Meta-analysis

PurposeTo evaluate the biomechanical properties of open versus percutaneous Achilles tendon repair. MethodsA systematic review of original research articles was performed using PRISMA (Preferred Reporting Items for Systematic Reviews and Meta-Analyses) guidelines. To qualify for study inclusion, articles were required to be published in English, utilize a laboratory design using either human or animal tissue, and directly compare the biomechanical properties of open Achilles repair using a Krackow or Kessler technique versus percutaneous repair using either a locking or non-locking suture construct. The biomechanical outcomes evaluated were displacement (mm) and load to failure (N). ResultsTwelve studies met inclusion criteria, including 234 specimens (open: 97, percutaneous locking: 73; percutaneous non-locking: 64) that underwent primary mid-substance Achilles tendon repair. Pooled analysis demonstrated no statistically significant difference in displacement (p=0.240) or load to failure (p=0.912) between the open and percutaneous techniques. Among the percutaneous approaches, there was no difference in displacement (p=0.109) between the locking and non-locking tendon repair systems. ConclusionThe results of this study suggest that both open and percutaneous techniques are biomechanically viable approaches for primary mid-substance Achilles tendon repair. Clinical RelevanceIn clinical studies, similar re-rupture rates have been observed after open or percutaneous Achilles tendon repair. It may be beneficial for surgeons to understand whether biomechanical differences exist between these repair techniques.

Postoperative Return to Play and the Role of Imaging.

Return to play (RTP) following surgery is a complex subject at the interface of social and internal pressures experienced by the athlete, psychological readiness, and intrinsic healing of the surgically repaired structures. Although functional testing, time from surgery, clinical examination, and scoring metrics can help clarify an athlete's readiness to return to sport, imaging can allow for a more direct assessment of the structures in question. Because imaging is often included in the diagnostic work-up of pain following surgery, the radiologist must be familiar with the expected postsurgical imaging appearance, as well as the associated complications. We briefly review such findings following anterior cruciate ligament reconstruction, Achilles tendon repair, syndesmotic fixation, and ulnar collateral ligament reconstruction in the context of the athlete, highlighting issues related to RTP.

Comparison of Suture Types and Techniques in Achilles Tendon Repair: An Ex Vivo Biomechanical Animal Experiment.

The ideal suture technique and type in tendon repair remain unclear. This biomechanical study aimed to assess the biomechanical characteristics of three techniques-modified Kessler (mKE), modified Krackow (mKR), and modified tension Bunnell (mtBU)-in sheep Achilles tendon tear repair using three suture types-polypropylene, polyester, and ultra-high-molecular-weight polyethylene (UHMWPE)-which are also compared. Sixty-three Achilles tendons harvested from sheep were transversely hacked as a replacement for rupture in a standardized measure and repaired using mKE, mKR, and mtBU techniques with No. 2 polypropylene, polyester, and UHMWPE sutures. Biomechanical parameters, such as Young's modulus, ultimate strength, and strength to the 5-mm gap, were recorded for statistical analysis. The mtBU technique with UHMWPE use resulted in increased ultimate strength, strength to 5-mm gap, Young's modulus, and quantity of specimens with low clinical failure modes compared with the other techniques with other suture materials. Furthermore, mtBU has the lowest thickness at the repair side of the tendons. This approach showed tendon failure during maximal traction testing, whereas the mKE and mKR techniques had polyethylene and polyester suture failures. The UHMWPE suture was significantly superior to the other sutures in each technique in terms of strength and durability. The mtBU technique using UHMWPE suture showed better biomechanical results, implying that this repair might be more appropriate to obtain early mobilization after tendon ruptures.

Ultrasound-guided Percutaneous Achilles Tendon Repair

There is no consensus as to the standard treatment of ruptured Achilles tendon. In this paper, we present an innovative method of treating Achilles tendon rupture. Ultrasound-guided percutaneous Achilles tendon repair is a minimally invasive method in the treatment of Achilles tendon rupture. This study aims to assess the feasibility and effectiveness of the procedure in treating ruptured Achilles tendons and in minimizing the complications of surgical percutaneous suturing. Thirty-four patients were treated for Achilles tendon rupture using a percutaneous suturing method under the control of ultrasound. The average follow-up was ~22 months with good and excellent results. As the sural nerve can be easily displayed by high-frequency real-time ultrasonography, the percutaneous repair of the Achilles tendon rupture can be aided by intraoperative ultrasound. The presented method is a quick and efficient surgery, which allows the treatment of torn Achilles tendons in a low-invasive way. The outcomes of this method are promising and enable the reduction of complications of the classic suturing methods. Level of Evidence: Diagnostic Level IV. See Instructions for Authors for a complete description of levels of evidence.

Risk factors and clinical characteristics of surgical site infections in athletes undergoing Achilles tendon repair surgery.

Achilles tendon ruptures are common in athletes, requiring surgical intervention. However, the risk of surgical site infections (SSIs) post-surgery poses significant challenges. This study aims to analyse the risk factors and microbial aetiology associated with SSIs in athletes undergoing Achilles tendon repair. A comprehensive retrospective analysis was conducted from May 2021 to July 2023. The study included 25 patients with SSIs (case group) and 50 patients without SSIs (control group) post Achilles tendon repair surgery. Inclusion criteria encompassed patients with medically confirmed Achilles tendon ruptures who underwent surgical repair. Exclusion criteria included prior tendon pathologies and significant chronic illnesses. Diagnostic criteria for SSIs involved symptoms like elevated body temperature and localized tenderness, along with laboratory confirmations such as positive microbiological cultures. The study utilized VITEK® 2 for bacterial identification and involved statistical analyses like univariate and multivariate logistic regression. The study identified Staphylococcus aureus as the primary pathogen in SSIs. Significant risk factors included lack of prophylactic antibiotic use, presence of diabetes, open wounds and prolonged surgery duration. Univariate analysis revealed stark contrasts in these factors between infected and non-infected groups, while multivariate analysis underscored their importance in SSI development. S. aureus emerged as the predominant pathogen in SSIs post Achilles tendon repair. Critical risk factors such as absence of prophylactic antibiotics, diabetes, open wounds and extended surgery duration play a vital role in SSIs. Addressing these factors is essential for better postoperative outcomes in Achilles tendon repair surgeries.

Modified Dresden Technique With a Distal Locking Suture for Achilles Tendon Repair: Technique Tip.

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Long-term results and complication following Achilles tendon rupture repair

Introduction Currently,there is no consensus regarding optimal treatment options of Achilles tendon rupture. The purpose of this study was to evaluate long term results of Achilles tendon repair using different surgical techniques, assess complication rate and subjective satisfactionMethods The study included patients treated for Achilles tendon rupture using minimally invasive and open surgical repair. Complications including re-rupture, infection, deep vein thrombosis and neuropraxia were identified. In order to evaluate the factors influencing the risk of postoperative complications, logistic regression analysis was performed. The Achilles Tendon Rupture Score (ATRS) and the American Orthopedic Foot and Ankle Score (AOFAS) evaluated subjective outcomes.Results 130 patients with Achilles tendon tear were enrolled (123 primary and 7 revision cases). In primary repairs percutaneous technique was used in 60 % of cases (74/123), mini open technique – in 16 % (19/123), and open technique – in 24 % (30/123). Re-rupture occurred in 2.4 % of patients treated with minimally invasive techniques. There were no repeated ruptures following open repairs. Predominant number of infections was registered after open repairs and made 10 %, while minimally invasive techniques had 3.2 % of infections. Logistic regression analyses showed that steroid injection, open repair, application of tapes and autografts increased the risk of infectious complications. There were no significant differences in ATRS and AOFAS scores between different primary Achilles tendon repair techniques (p > 0.05).Discussion Results, obtained in the current study, are consistent with previously published data.Conclusions Open Achilles tendon repair showed a higher rate of infections, and lower rate of re-ruptures. The anamnesis of steroid injection, open repair, application of tapes and autografts increases the risk of infectious complications.

Tendon Elongation and Function After Delayed or Standard Loading of Surgically Repaired Achilles Tendon Ruptures: A Randomized Controlled Trial

Background: Achilles tendon ruptures often result in long-term functional deficits despite accelerated (standard) rehabilitation. Purpose/Hypothesis: The purpose of this study was to investigate if delayed loading would influence functional, clinical, and structural outcomes of the muscles and tendon 1 year after a surgical repair. It was hypothesized that delaying the loading would reduce the heel-rise height deficit 1 year after Achilles tendon rupture. Study Design: Randomized controlled trial; Level of evidence, 1. Methods: In total, 48 patients with a surgically repaired Achilles tendon rupture were randomized to 2 groups: the standard group received the currently accepted rehabilitation, and the delayed group received the same rehabilitation except that initial loading was delayed by 6 weeks. The primary outcome was the heel-rise height difference between the injured and uninjured sides at 1 year. The secondary outcomes were (1) tendon length measured with magnetic resonance imaging, (2) muscle fascicle length and pennation angle of the gastrocnemius medialis muscle, (3) Doppler activity measured with ultrasonography, (4) Achilles tendon Total Rupture Score (ATRS), and (5) isometric muscle strength. Results: The mean heel-rise height deficits for the standard and delayed groups were −2.2 cm and −2.1 cm, respectively (P = .719). The soleus part of the tendon was already elongated 1 week after surgery in both groups without a between-group difference (side-to-side difference: standard, 16.3 mm; delayed, 17.5 mm; P = .997) and did not change over 52 weeks. The gastrocnemius tendon length was unchanged at 1 week but elongated over time without a between-group difference (side-to-side difference at 52 weeks: standard, 10.5 mm; delayed, 13.0 mm; P = .899). The delayed group had less Doppler activity at 12 weeks (P = .006) and a better ATRS (standard, 60 points; delayed, 72 points; P = .032) at 52 weeks. Conclusion: Delayed loading was not superior to standard loading in reducing the heel-rise height difference at 1 year. The data indirectly suggested reduced inflammation in the initial months and a better patient-reported outcome at 1 year in the delayed group. The soleus part of the tendon was already markedly elongated (35%) 1 week after surgery, while the length of the gastrocnemius tendon was unchanged at 1 week but was 6% elongated at 1 year. Together, these data indirectly suggest that the delayed group fared better, although this finding needs to be confirmed in future investigations. Registration: NCT04263493 (ClinicalTrials.gov identifier).

Pickleball- and Paddleball-Related Injuries in the Lower Extremity: Description, Treatment Options, and Return to Play.

Background Pickleball and paddleball are the fastest-growing sports in the United States. However, there are limited studies on the types of lower extremity injuries and treatment options in an outpatient clinic setting. Hypothesis/purpose This study reports the incidence rate, treatments, and return-to-play (RTP) outcomes for patients presenting to a single orthopedic outpatient center with pickleball- and paddleball-related lower extremity injuries. Study design This study is a retrospective case series, with level IV evidence. Methods A database search of our multispecialty electronic medical record (EMR) system from 2015 to 2023 identified 166 patients with outpatient pickleball- and paddleball-related lower extremity injuries. The retrospective data were reviewed for patient demographics, injury type, mechanism of injury,surgical or non-surgical treatment, and return-to-play recommendations. Results We observed that the majority of the patients with pickleball- and paddleball-related injuries in the lower extremities were over 60 years of age, with more males. Additionally, most injuries encountered were ankle sprain/strain from a twisting mechanism, which was treated non-surgically.Additionally, a significant number of patients suffered an Achilles tendon rupture (12.0%), which was treated surgically with an Achilles tendon repair (88.1%), accounting for the most common surgical treatment performed in this study. Of the 166 patients who were seen and treated, 68 (40.9%) returned to play, and 93 (56.3%) were lost to follow-up. Conclusion Most of these injuries were seen in the older population and caused by a sprain or strain due to sudden changes in direction, which were treated non-surgically. The most common surgical treatment was an Achilles tendon repair due to an Achilles tendon rupture. Although a relatively good number of patients were cleared to return to play, some patients were lost to follow-up. Meanwhile, some patients were advised to stop playing pickleball or paddleball due to the severity of their injuries. As this sport continues to rise in popularity and with the incidence rate of lower extremity injuries increasing over time, orthopedic surgeons should be aware of the types of injuries, treatment options, and outcomes, as well as ways to advise patients on prevention. Therefore, further research on the standard treatments and outcomes of pickleball- and paddleball-related injuries in the lower extremities is encouraged.

An Early Functional Unsupervised Rehabilitation Protocol Allows Safe Return to Function After Achilles Tendon Repair.

Acute Achilles tendon tears in young active individuals are often treated surgically with prolonged rehabilitation, with the leg initially immobilized in plantar flexion in serial non-weight bearing casts and gradually progressing to full weight bearing. This study aimed to evaluate the safety of an early functional unsupervised rehabilitation protocol. The medical records of 25 patients treated with open repair were available for follow-up. In 10 patients, an early functional unsupervised rehabilitation protocol was used with a removable cast, active range of motion exercises of the ankle from the first postoperative day, and full weight bearing in a walking boot with the foot plantigrade after the second week. Another 15 patients who followed the classic rehabilitation protocol were used as controls. The patients were evaluated with the Victorian Institute of Sports Assessment-Achilles (VISA-A) and an ultrasound examination-based score. A Wilcoxon test was used to compare the scores between the groups. The mean VISA-A score was 90.1 (SD = 9.87) for the early functional rehabilitation protocol group, while it was 83.8 (SD = 17.06, p = 0.624) for the control group. The mean ultrasound score was 7.75 (SD = 1.71)for the early functional rehabilitation protocol group, while it was 7.60 (SD = 3.05, p = 0.414) for the control group. There were no intra- or early postoperative complications in the groups, and all patients were satisfied with the results of their operation. An early unsupervised functional rehabilitation protocol after open Achilles repair may allow for safe early mobilization and minimize the need for physiotherapy. The small number of participants is a limitation of this study, and further evaluation with more patients is necessary to document the efficacy.

Incidence and Time Course of Symptomatic Thromboembolic Outcomes After Lower Extremity Arthroscopic Surgery, Ankle Fracture Surgery, and Achilles Tendon Repair.

The incidence and time course of acute venous thromboembolism (VTE) after ambulatory surgery for lower extremity orthopaedic conditions is not well-defined. The purpose of this study was to analyze the incidence, the time course, and risk factors associated with clinically diagnosed acute deep vein thrombosis or pulmonary embolism within 3 months of surgery in patients undergoing specific operations for lower extremity injuries. Patients undergoing arthroscopic procedures of the knee, ankle fracture surgery, Achilles tendon repair, and ankle arthroscopy from January 1, 2005, to December 31, 2010, were identified in the California Ambulatory Surgery database with linkage to hospital discharge data, emergency department data, and a death registry. Outcomes were acute VTE and death within 90 days. Time courses were compared using Kaplan-Meier analysis, and risk factors were analyzed using proportional hazard modeling. Analysis of data from 468,699 surgeries showed that the cumulative incidence of acute VTE was significantly higher after Achilles tendon repair (0.72%, P < 0.001) than ankle fracture surgery (0.33%), knee arthroscopy procedures (range, 0.29% to 0.41%), or ankle arthroscopy (0.24%). The time course of diagnosis of VTE was similar for all arthroscopic procedures (median postoperative day for diagnosis = 9 to 10; 80% by 22 to 36 days), whereas for Achilles tendon surgery, the time course was protracted (median postoperative day for diagnosis = 29 days; 80% by 51 days). Ninety-day mortality was low (<0.06%) after all procedures except ankle fracture (0.12%). Predictors of pulmonary embolism included age older than 60 years (HR, 3.1; 95% CI; 2.0 to 4.8, versus younger than 30 years), Achilles tendon repair (HR, 3.8; 95% CI; 2.8 to 5.3), and ankle fracture surgery (Hazard Ratio [HR], 2.1; 95% Confidence Interval [CI]; 1.5 to 2.8); Asian/Pacific Islander (HR, 0.3; 95% CI; 0.1 to 0.6) and Hispanic patients (HR, 0.5; 95% CI; 0.4 to 0.7) had significantly lower risk. The incidence and time course of onset of acute VTE after lower extremity orthopaedic surgeries varies significantly depending on the surgical procedure. These findings have implications regarding the use and duration of pharmacologic thromboprophylaxis.

Optimal access for Achilles Tendon Repair

Background. Despite the many accesses described in the literature for open Achilles tendon repair, there is no evidence of the benefits of this or that access confirmed by clinical observations.The aim is to determine and justify optimal access during open Achilles tendon repair.Material and methods. The article shows the result of the analysis of data from a literary search, experimental work on 12 lower limbs of 6 cadavers, a clinical study based on a retro-prospective analysis of the treatment of 128 people in the Department of Emergency Traumatology N.V. Sklifosovsky Research Institute from 2014 to 2022. The comparison group retrospectively included 47 patients (36.7%) with Achilles tendon injury, who underwent suture of the Achilles tendon from S and Z–shaped accesses from 2014 to 2017. The main group prospectively included 81 patients (63.3%) for 2018-2022, who underwent paramedial tendon access.Results. The analysis of a retrospective study showed that 3 patients from the comparison group with Achilles tendon injury in the postoperative period had ischemia of the wound edges with subsequent formation of necrosis and skin defect; 1 patient had a hypertrophic painful scar, which ulcerated from the constant traumatization of his shoe back (the total number of complications was 8.5%). In the patients of the main group, there were no complications in the postoperative period in any case. Conclusion. In our opinion, the paramedial tendon access is optimal, because there are no complications from the skin and leads to improved functional results.

In vivo study on the repair of rat Achilles tendon injury treated with non-thermal atmospheric-pressure helium microplasma jet.

Non-thermal atmospheric-pressure plasma (NTAPP) has been widely studied for clinical applications, e.g., disinfection, wound healing, cancer therapy, hemostasis, and bone regeneration. It is being revealed that the physical and chemical actions of plasma have enabled these clinical applications. Based on our previous report regarding plasma-stimulated bone regeneration, this study focused on Achilles tendon repair by NTAPP. This is the first study to reveal that exposure to NTAPP can accelerate Achilles tendon repair using a well-established Achilles tendon injury rat model. Histological evaluation using the Stoll's and histological scores showed a significant improvement at 2 and 4 weeks, with type I collagen content being substantial at the early time point of 2 weeks post-surgery. Notably, the replacement of type III collagen with type I collagen occurred more frequently in the plasma-treated groups at the early stage of repair. Tensile strength test results showed that the maximum breaking strength in the plasma-treated group at two weeks was significantly higher than that in the untreated group. Overall, our results indicate that a single event of NTAPP treatment during the surgery can contribute to an early recovery of an injured tendon.

Evaluation of Costs Associated With Acute Achilles Tendon Repair.

Increasing attention is being paid to the costs associated with various orthopaedic surgeries. Here, we studied the factors that influence costs associated with surgically treated acute Achilles tendon tears. We retrospectively identified patients with surgically repaired acute Achilles tendon tears, excluding insertional ruptures or chronic tendon issues. Using the Value Driven Outcome (VDO) tool from our institution, we assessed total direct costs as well as facility costs. Briefly, the VDO tool includes an item-level database that can capture detailed cost data-costs are then reported as relative mean data. Cost variables were adjusted to 2022 US dollars, and total direct cost was compared with patient characteristics using gamma regressions to report cost ratios with 95% CIs. Our cohort consisted of 224 patients with Achilles tendon tears surgically repaired by one of 4 fellowship-trained orthopaedic foot and ankle surgeons. There were no differences in demographics, total direct costs, or facility costs based on surgical positioning (prone n = 156, supine n = 68). Open repairs (n = 215), compared with percutaneous techniques (n = 9) that used commercially available instrumentation, had 37% less total direct costs (P < .001, 95% CI 0.55-0.72). Compared with surgery at a main academic hospital (n = 15), procedures at an ambulatory care center (n = 207) had 19% lower total direct costs (P = .040, 95% CI 0.66-0.99) and 41% lower facility costs (P < .001, 95% CI 0.5-0.7). Improving cost-effective orthopaedic care remains an increasingly important goal. Patient positioning for Achilles tendon repair does not appear to have meaningful impacts on cost. When clinically appropriate, considering surgery location at an ambulatory center appears to reduce surgical costs. Level III, retrospective comparative study.

The effects of zinc sulfate mineral supplementation on Achilles tendon healing in rats.

The Achilles tendon is the most commonly injured and ruptured tendon in the body and typically occurs during participation in sports or recreational activities in men between 30 and 50 years of age. Treatment options for Achilles tendon rupture include conservative and surgical approaches. Conservative treatment is associated with a higher risk of rerupture, while surgical treatment carries a risk of wound site complications. Generally, both methods result in a prolonged tendon healing time. Studies are ongoing to identify biomolecules that aid tendon repair. The main objective of our study is to investigate the effects of zinc sulfate (ZnSO4) mineral supplementation on Achilles tendon healing in rats. Forty-eight female Sprague-Dawley rats were divided into four equal groups (C-15, C-30, ZnSO4-15, and ZnSO4-30) after standard Achilles tendon repair surgery. The ZnSO4-15 and ZnSO4-30 groups received an oral zinc sulfate monohydrate solution (50 mg/kg/day) for 15 and 30 days, respectively. The C-15 and C-30 groups were given 1 mL of distilled water per day orally during the experimental periods. Rats were sacrificed on the 15th and 30th day depending on their groups, and the healing of the operated tendons was evaluated using Movin and Bonar histopathologic scoring. For biomechanical analyses, the operated and intact Achilles tendons of all groups were removed, and tensile tests were performed to determine the tensile strength and toughness values for each tendon. Movin and Bonar scores were significantly lower in the ZnSO4-15 group than in the C-15 group and in the ZnSO4-30 group than in the C-30 group (p<0.05). Although we did not find the biomechanical results statistically significant, the intact tendons of the ZnSO4-15 group exhibited higher toughness than those of the C-15 group, and the tensile strength and toughness values of the operated and intact tendons of the ZnSO4-30 group were also higher than those of the C-30 group. Zinc sulfate monohydrate mineral supplementation had histopathologically positive effects on the proliferation and remodeling stages of Achilles tendon healing and may biomechanically benefit both operated and intact tendons.

Current treatment concepts for Achilles tendon rupture.

Achilles tendon rupture is a common and primary cause of lower limb tendon injury suffered during sports-related activities. The causes of Achilles tendon rupture include the calf muscle and tendon overuse, poor tendon quality, and various medical conditions. Historically, acute Achilles tendon rupture was treated conservatively. However, historical techniques are now associated with an increased risk of rerupture. To address this problem, open repair has been proposed. Open repair is associated with a reduced risk of rerupture; however, it is also closely associated with wound complications, like wound infection, whose treatment is time-consuming and costly. Therefore, minimally invasive Achilles tendon repair has been proposed as a promising option with acceptable functional outcomes. Nevertheless, despite its benefits, minimally invasive Achilles tendon repair is associated with increased risks of sural nerve injury and rerupture. In this review, we evaluate the currently used treatment strategies for acute Achilles tendon rupture and their historical evolution to provide evidence-based recommendations for physicians.

Biomechanical evaluation of surgical techniques for Achilles tendon repair: a laboratory study in bovine tendons

O tratamento percutâneo da ruptura do tendão calcâneo tem sido amplamente empregado. Estudos biomecânicos permitem a análise da resistência das suturas e a reprodutibilidade clínica.&#x0D; Nosso trabalho analisou, 36 tendões calcâneos bovinos, submetidos a reparo de ruptura produzida a 4cm da inserção e divididos em três grupos: simples sholeace(SS), Triplo Shoelace(TP) e Carmont &amp; Mafulli(CM), avaliados biomecanicamente quanto: alongamento, rigidez, força máxima força e tipo de falha do sistema.&#x0D; Os resultados do alongamento,foram de 5,9mm no grupo1(SS), 3,0 mm para o grupo2(TS) e 3,8mm no grupo3(CM), significância estatística entre o grupo2 e os grupos1(p0,003767) e 3(p0,0005). Com relação a rigidez do sistema; grupo1 apresentou 23,2N/mm, grupo2 -30,3N/mm e grupo3 -28,6N/mm, significância estatística dos grupos2(p≈0) e 3(p0,0075) em relação grupo1. Os resultados de força máxima foram de 158,2N grupo1, 346,5N no grupo2 e146,1N para o grupo3, tendo significância estatística a entre o grupo 2 aos grupos 1(p≈0) e 3(p≈0). O tipo de falha na ruptura apresentou significância estatística entre todos os grupos analisados.&#x0D; O aumento do número de fios de suturas diminuiu o alongamento e aumentou a rigidez do construto, significância estatística dos grupos2 e 3 sobre o grupo1. A sutura simétrica em ambos os cotos e maior número de passada no tendão são demonstrados pela maior resistência no grupo2 (346,5N) até a falha, corroborado pela falha por arrancamento em todos os casos no grupo3.

Conservative treatment outcome for Achilles tendon re-rupture occurring in the subacute phase after primary repair.

Until now, a treatment protocol for Achilles tendon re-rupture (ATRR) occurring in the postoperative period 5-12weeks following primary Achilles tendon repair has not been established. We refer to this time frame as the subacute postoperative phase, and the objective of this study was to assess the efficacy of conservative treatment for subacute ATRR in this phase. We conducted a retrospective review of 390 cases (385 patients) who had undergone primary Achilles tendon repair using the 4-strand Krachow method between January 2010 and August 2021. All patients were subjected to more than 12months of follow-up and were categorized into two groups based on the presence of subacute ATRR: Group 1 comprised 370 cases without ATRR, while Group 2 comprised 20 cases with ATRR. Following confirmation of ATRR, we immediately applied a below-knee cast in an ankle plantar flexed position (25°-30°), followed by bracing according to the same rehabilitation plan used for the primary repair. After administering conservative treatment to the patients with ATRR, we compared several outcome parameters between the two groups, including isokinetic plantar flexion power measured using a dynamometer, time required for a single heel raise (t-SHR), time needed for ten repetitive SHRs (t-SHR10), Achilles Tendon Total Rupture Score (ATRS), and Foot and Ankle Ability Measure (FAAM) scores. The baseline timepoints for Groups 1 and 2 were the dates of the primary repair and the re-injury event. After primary Achilles tendon repair, subacute ATRR occurred in 5.1% of patients. There were no significant differences between the groups in terms of t-SHR and t-SHR10 (P = 0.281, 0.486). Similarly, the isokinetic dynamometer measurements revealed no significant differences in peak torque for plantar flexion at angular velocities of 30°/s and 120°/s, both in absolute values and as a percentage of the contralateral side, between the groups (P > 0.05 for each). However, ATRSs were significantly lower in Group 2 compared to Group 1 before 6months (P < 0.05), as were FAAM-Activities of Daily Living scores at 6months (P < 0.05). After 12months, there were no significant differences in these scores between the two groups (both P > 0.05). Conservative treatment for subacute ATRR following primary Achilles tendon repair yields clinical outcomes comparable to those without ATRR. Therefore, we recommend that surgeons consider relying on the patient's natural healing capabilities rather than opting for aggressive surgical interventions, as expediting such operations may be unnecessary for subacute injuries.

Novel CO2-encapsulated Pluronic F127 hydrogel for the treatment of Achilles tendon injury

Nonsurgical treatment and surgical repairment of injured Achilles tendons seldom restore the wounded tendon to its original elasticity and stiffness. Therefore, we hypothesized that the surgically repaired Achilles tendon can achieve satisfactory regeneration by applying multi-drug encapsulated hydrogels. In this study, a novel bupivacaine-eluting carbon dioxide-encapsulated Pluronic F127 hydrogel (BC-hydrogel) was developed for the treatment of Achilles tendon injuries. The rheological properties of BC-hydrogel were measured. A high-performance liquid chromatography assay was used to assess the release characteristics of bupivacaine in both in vitro and in vivo settings. Furthermore, the effectiveness of BC-hydrogel in treating torn tendons was examined in a rat model, and histological analyses were conducted. Evidently, the degradable hydrogels continuously eluted bupivacaine for more than 14 days. The animal study results revealed that the BC-hydrogel improved the post-surgery mobility of the animals compared with pristine hydrogels. Histological assay results demonstrated a significant reaction to high vascular endothelial growth factor in the surrounding tissues and expression of collagen I within the repaired tendon. This demonstrates the potential of this novel BC-hydrogel as an effective treatment method for Achilles tendon injuries.

Reconstruction of Achilles Tendon Skin Defect Using Single-Stage Reverse Sural Artery Island Flap

Wound complications following open repair of a ruptured Achilles tendon are common and require immediate skin cover. This study analyses the use of a reverse sural artery island flap to cover skin defects over an exposed intact Achilles tendon. Thirteen patients with postoperative wound complications over the tendoachilles were operated upon. All wounds were debrided and reconstructed with a single-stage reverse sural artery island flap. Within 5 weeks of flap cover, 12 wounds healed completely, while 1 flap had superficial necrosis at the margin in a diabetic patient. This eventually healed and did not compromise the final result. None of the flaps had venous congestion. In our hands, reconstructing skin defects following wound complications after Achilles tendon repair with islanded reverse sural artery flap is a reliable and safe option. Level of Evidence: Level IV.