This classic discusses the original publication of Dohan Eherenfest etal. on "Classification of platelet concentrates: from pure platelet-rich plasma (P-PRP) to leucocyte- and platelet-rich fibrin (L-PRF)", in which the authors propose four categories of platelet concentrates depending on their leucocyte and fibrin content (P-PRP, leucocyte- and platelet-rich plasma (L-PRP), pure platelet-rich fibrin (P-PRF), and L-PRF) to group a "jungle" of products in which the term platelet-rich plasma (PRP) was used indistinctly. They were able to identify common factors such as: (1) the use of anticoagulants and immediate centrifugation of the blood after its collection; (2) most preparation techniques allowed platelet concentrate preparation within an hour; (3) the centrifugation aimed to separate the blood in layers that would allow the extraction of specific fractions; and (4) the product was activated with thrombin or calcium chloride. The reviewed manuscript has been listed among the most cited PRP articles in regenerative medicine, with more than 800 citations, driving current scientific research and clinical practise by categorising L-PRP and P-PRP (now, leucocyte-poor PRP). The classification has also opened the door to understanding intrinsic biological mechanisms between platelets, leukocytes, fibrin, and growth factors, which will later be considered for studying the proliferation and differentiation of cells in different tissues affected by PRP. Since the initial classification of platelet concentrates, several other classification systems have been proposed and published in the current literature such as platelet, activation, white blood cell (PAW), Mishra, platelet, leucocyte, red blood cells, and activation (PLRA), dose of platelet, efficiency, purity, and activation (DEPA), method, activation, red blood cells, spin, platelets, image guidance, leukocytes, and light activation (MARSPILL), etc. These classifications have identified important aspects of PRP that affect the biological composition and, ultimately, the indications and outcomes. To date, there is still a lack of standardisation in sample preparation, cohort heterogeneity, and incomplete reporting of sample preparation utilised, leading to a lack of clarity and challenging researchers and clinicians.

Hindfoot coronal alignment is an important factor in the assessment of patients with many different foot and ankle complaints. A number of clinical and radiographic techniques have been described to measure hindfoot coronal alignment, but none of them are widely accepted. The purpose of the present study was to assess the correlation between clinical and radiographic hindfoot alignment measures and to evaluate the reproducibility of each. We evaluated 85 patients with foot and/or ankle symptoms. Hindfoot clinical alignment was measured from photographs. Each patient was placed at a distance of 1 m from the observer, with both feet placed parallel. Four photographs were taken, at a height of 40 cm: a posterior view of both lower limbs including knees, a posterior view focalized on the studied hindfoot, an anterior view of the foot, and the last view of the medial aspect of the foot. Radiographic alignment was quantified on long axial view radiographs. Patients were lying over the film cassette with a focus distance of 1 m and the beam pointed to the ankle joint. The inclination angle of the beam was 45 degrees to the floor. Measurements were independently made by 2 observers, who were asked to classify pictures into 3 categories: varus, neutral, and valgus. Radiographic measurements were made using the angle measurement tool on the radiograph viewer. The intraclass correlation coefficients (ICCs) and the 95% confidence interval (CI) of the ICC were used to quantify the inter- and intraobserver reliability for clinical assessment. Radiographic parameters were correlated by calculating the Pearson correlation coefficient (r). The intraobserver ICC for clinical analysis was good for both observers, while the interobserver ICC was moderate for both measurements. Regarding radiographic assessment, there was significant intra- and interobserver reliability. The correlation between both methods was weak for both observers. We found only weak intra- and interobserver correlations between the clinical and radiographic assessment of hindfoot coronal alignment. It is therefore necessary to complement the clinical evaluation of hindfoot alignment with an objective measurement method such as a long axial view radiograph. Further studies comparing different measurement methods need to be performed to establish the most objective evaluation. Level III, diagnostic study.

ObjectivesTo create a practice guideline for the appropriate indications of an extra-articular procedure in primary anterior cruciate ligament reconstruction (ACLR). MethodsThe formal consensus method described by the Haute Autorité de Santé was used. The Latin American Society of Arthroscopy, Articular Replacement, and Sports Injuries (SLARD) recruited three groups of experts on ACLR. Initially, the steering group, consisting of eight surgeons, performed a systematic review of the literature and elaborated on 192 scenarios for primary ACLR. The rating group, composed of 23 surgeons, rated each scenario in two rounds, with an in-between in-person meeting for discussion. Median scores and agreement levels were estimated to classify each scenario as inappropriate, uncertain or appropriate for adding anterolateral reconstruction. Finally, the lecture group, consisting of 10 surgeons, revised each stage of the method, results and interpretation. ResultsOf the scenarios, 11.97% were rated as appropriate for adding an extra-articular lateral procedure, 7.81% as inappropriate and 80.21% as uncertain. The key recommendations for the addition of extra-articular lateral techniques were as follows: it is appropriate when the patient is under 25 years of age, has high-grade physical examination findings, practises a pivoting sport and has hyperlaxity; meanwhile, it is inappropriate when the patient has low-grade physical examination findings, has normal laxity and does not practise a pivoting sport. ConclusionsThe appropriate indications of extra-articular lateral procedures in primary ACLR were determined on the basis of the best available evidence and expert opinion following a formal consensus method. Level of evidenceV.

ABSTRACTWe examine how creditor protection affects firms with different levels of owners' and managers' personal costs of bankruptcy (PCB). Theoretically, we show that firms with high PCB borrow and invest more under a more debtor‐friendly management stay system, whereas firms with low PCB borrow and invest more under a more creditor‐friendly receivership system. Intuitively, stronger creditor protection relaxes financial constraints but reduces credit demand. Which effect dominates depends on owners' and managers' PCB. Empirically, we find support for these predictions using a Korean bankruptcy reform that replaced receivership with management stay.

During the last 2 decades, there was an increasing interest in mini-invasive procedures for hallux valgus correction. In this scenario the Bösch technique appears to be a reproducible distal metatarsal osteotomy (DMO) to achieve a proper correction. Our DMO variant, called BC, was planned to combine the stability and predictability of the chevron osteotomy, with the power of correction, low surgical time and mini-invasive approach of the Bösch-SERI technique. The purpose of this investigation is to describe the surgical technique and report the results of this modified procedure at a minimum 2-year follow-up. Sixty-three patients who underwent the BC technique for mild and moderate hallux valgus were prospectively evaluated. Mean follow-up was 36.5 (range 23.4-59.8) months, the mean American Orthopedic Foot and Ankle Society score improved from a median of 47.4 points preoperatively to a median of 88 points postoperatively (p < .05). First MTPJ ROM did not change from preoperative period (mean 32.5°) to the postoperative period (mean 31.8°) (p > .65). All osteotomies went on to bony healing in the 6-week follow-up visit. Fifty-two (82%) of patients were either very satisfied or satisfied with the procedure (p < .05). With our numbers, BC osteotomy is shown to be a technique that can treat both mild and moderate deformities, achieving correction that is maintained over the follow-up evaluated, with a 24 relatively simple procedure and short operative time.

Although there is no consensus regarding surgical treatment of unstable sprains and fractures dislocations of the Lisfranc complex, both anatomic reduction, proper alignment and adequate stabilization of the tarsometatarsal columns are essential when looking for good results. With the advent of minimally invasive surgery, and bearing in mind that the percentages of complications and sequelae despite the good results in reduction quality are still important, we aim to show the clinical and radiographic results over 1-year follow-up obtained by indirect reduction and percutaneous fixation with bridge plate and extra-articular screws in a series of patients with low-energy and high-energy Lisfranc lesions. Eleven patients were operated upon diagnosed with acute tarsometatarsal joint injuries, which showed unstable sprains and/or fracture dislocation with partial articular fracture and a minimum of 1-year follow up. The average age was 30.7 years. The results of the postoperative tomographic controls were as follows: residual joint step average of 0.2 mm, 0.45, and 0 mm in first cuneiform-base of first metatarsal, second cuneiform-base of second metatarsal and third cuneiform-base of third metatarsal, respectively. Anatomical reduction was obtained in the majority of our patients with very good functional results in the evaluated period. Although this is an ongoing investigation, we believe that this method could be taken into account in properly selected patients, even in high-energy injuries. Level of Evidence: Diagnostic Level IV. See Instructions for Authors for a complete description of levels of evidence.

Although far less common than lateral ankle injuries, medial ankle sprains have been reported to result in significantly greater time lost and long-term disability when not diagnosed and treated accurately. Adequate diagnosis is paramount and the most important aspect is to determine whether the lesion is stable or unstable. Evidence confronting surgical versus conservative treatment in acute deltoid ligament lesions is largely anchored in the setting of ankle fractures. Ultimately treatment decisions rely on the clinical and imaging appraisal of each individual patient. This article discusses the isolated acute deltoid ligament impairment.

Osteotomies are commonly used in order to correct hallux valgus deformity. However, soft tissue structures also play an essential role in the etiology, progression, and treatment of hallux valgus (HV). The purpose of the present study was to analyze the correcting power (varus), reduction strength (sesamoid) and rotation of metatarsal and proximal phalanx after percutaneous adductor tendon release (PATR). To date, no study addresses this issue. Eleven cadaveric fresh-frozen below-the-knee cadaveric lower limbs with associated hallux valgus deformity were used. These specimens were subjected to a constant abduction force after PATR. HV and intermetatarsal angles showed statistically significant differences when comparing the preoperative and postoperative periods. PATR showed to be a reliable technique as the adductor tendon was completely released in 9 cases, and 75% released in the remaining 2 feet. The study supports that PATR provides powerful and quantifiable correction of HV deformity and can be accurately performed percutaneously.

PurposeThe aim of this study is to evaluate results of anterior cruciate ligament reconstruction (ACL) using an All-Inside Full Thickness Quadriceps Reconstruction technique at 5 years follow up.MethodsThis is a Retrospective cohort study of patients undergoing ACL reconstruction. Inclusion criteria for this report were isolated primary ACL reconstructions without chondral lesions (Grade III/IV Outerbridge), using autologous full-thickness quadriceps tendon (FQT) graft with bone block, with an “all-inside” technique. Functional scales of Lysholm, IKDC, Tegner and objective results of side to side difference (KT1000) were used for this evaluation. Additionally, complications and comorbidities were also analyzed.ResultsTwo hundred and ninety-one ACL reconstructions were retrospectively reviewed at 5 years postoperatively; 268 (92.1%) were men and 23 (7.90%) women. Lysholm Score improved from 64 (SD = 6.09) to 91 (SD = 6.05) points average. IKDC showed 59.79%, excellent and 3.4% good results. Arthrometric analysis showed that 259 knees (89%) had a difference of less than 3 mm. Median pre-injury Tegner score was 9 (Range 4–10), while final median Tegner activity level at 5 years was 8 (Range 4–10). Among comorbidities, 5.15% of the patients presented anterior knee pain. No visualization difficulties or significant hematomas were found.ConclusionUse of all inside FQT for ACL reconstruction in a young, high demand sports population, present at 5 years, good to excellent results, functionally and objectively, with low rates of complications and comorbidities.

Due to Instagram’s growing popularity in Spain, politicians have also begun to turn to this social network increasingly more. Accordingly, this paper analyses the visual and textual discourse of 259 posts published throughout 2018 on the personal Instagram profile of Santiago Abascal, the leader of the party Vox. Insofar as he is the Spanish politician with the highest number of followers on Instagram, the aim here is to analyse how he uses this social network in order to identify possible strategies that justify his growing number of followers. In the analysis, special attention was paid to aspects that might have contributed to the (self)presentation of Abascal and the promotion of his party, such as posting personal information and the direct involvement with his followers. The results show that consistent with the use to which Spanish politicians put Instagram, Abascal’s profile highlights his ‘political’ dimension and, specifically, his agenda. Personal content (such as references to leisure or sports) are used strategically to highlight certain features of his persona and ideology. The predominance of unedited images, the framing of the photos and appeals to his followers are some of the clues that reveal that, rather than providing access to his personal life, Abascal’s use of Instagram is the result of a carefully planned promotional strategy.