Felix Amsler

• MSc
• Owner at Amsler Consulting, Basel

Purpose To identify gender differences in (1) the coronal alignment of functional knee phenotypes and (2) the JLCA (joint line convergence angle) in relation to the phenotype classification. Methods This study is a retrospective data analysis, including 12,099 osteoarthritic knee computed tomography (5025 male, 7074 female) analysed by Medacta sof...

Background: A comprehensive exploration evaluating left-to-right knee symmetry across all anatomical planes utilizing three-dimensional (3D) scans stands absent from the existing body of research. Therefore, the primary objectives of this investigation involved examining potential differences and resemblances in alignment and structure between left...

Purpose One of the most pertinent questions in total knee arthroplasty (TKA) is: what could be considered normal coronal alignment? This study aims to define normal, neutral, deviant and aberrant coronal alignment using large data from a computed tomography (CT)‐scan database and previously published phenotypes. Methods Coronal alignment parameter...

Background: To compare the effectiveness of intermittent pneumatic compression (IPC) and/or manual lymphatic drainage (MLD) associated to compression stockings in the maintenance treatment of lymphedema. Patients and methods: Patients in the maintenance phase of lymphedema therapy with MLD and compression since more than a year with stable values f...

Background Quadriceps tendon rupture (QTR) is a severe injury of the knee extensor apparatus. The study aims to validate the use of forgotten joint score (FJS-12) for functional outcome assessing after surgical treatment of QTR. Methods Fifty-seven patients who underwent surgery for QTR with transosseous suture reconstruction in a single orthopaed...

Background Quadriceps tendon rupture (QTR) is a severe injury of the knee extensor apparatus. The study aims to validate the use of forgotten joint score (FJS-12) for QTR and assess the mid- to long-term functional outcome after surgical treatment of QTR. Methods Fifty-seven patients who underwent surgery for QTR with transosseous suture reconstru...

Background: With the Persona® knee system a novel anatomic total knee design was developed, which has no pre-coating, whereas the predecessor knee system is pre-coated with polymethylmethacrylate (PMMA). Joint registry data have shown no decrease in risk of aseptic revision of PMMA pre-coated tibial components compared with non-pre-coated implants...

Purpose: The indication of whole body computed tomography (WBCT) in the emergency treatment of trauma is still under debate. We were interested in the detailed information gain obtained from WBCT following standardized conventional imaging (CI). Methods: Prospective study including all emergency trauma centre patients examined by CI (focused asses...

The purpose of this study was to define a cut-off value for the posterior drawer position in stress radiography that confirms an insufficiency of the posterior cruciate ligament (PCL) in cruciate-retaining (CR) total knee arthroplasty (TKA). In this retrospective study, 20 symptomatic patients with flexion instability and suspected PCL insufficienc...

The purpose of this study was to define a cut-off value for the posterior drawer position in stress radiography that confirms an insufficiency of the posterior cruciate ligament (PCL) in cruciate-retaining (CR) total knee arthroplasty (TKA). In this retrospective study, 20 symptomatic patients with flexion instability and suspected PCL insufficienc...

Background: The aim was to investigate the correlation of bone tracer uptake (BTU) in SPECT/CT and changes in coronal knee alignment after total knee arthroplasty (TKA). We questioned if undercorrection of preoperative varus alignment leads to a difference in BTU compared to neutral alignment. Methods: Consecutive 66 patients who received SPECT/...

The purpose of this study was to determine the distribution of functional knee phenotypes in a non-osteoarthritic Asian population. The Stryker Orthopaedic Modeling and Analytics (SOMA) database was searched for CT scans of the lower limb meeting the following inclusion criteria: patient age at time of image >18 and <46 years, no signs of fractures...

PurposeLittle is known about the capabilities of triage and risk scores to predict the outcomes of injured patients, other than mortality, or to determine the need for trauma center resources.Methods Retrospective analysis of prospectively gathered monocenter data on consecutively admitted adult emergency room trauma patients. For each patient, the...

PurposeOngoing demographic changes go hand in hand with an increasing number of elderly injured. Given the conflicting literature we wanted to know how much age per se, apart from other factors, actually explains the outcome for elderly trauma patients.Methods Retrospective analysis of prospectively collected data on all significantly injured (new...

Abstract Background With the Persona® knee system a new polyethylene formulation incorporating vitamin-E which aims to reduce oxidation and maintain wear resistance was introduced. Although in-vitro studies have demonstrated positive effects of the vitamin-E antioxidants on UHMWPE, no retrieval study has looked at polyethylene damage of this system...

Background There are still insufficient data on the complexity and predictability of patient-related outcomes following trauma. The aim of this study was to assess longer-term outcomes in patients with significant injury and to develop a simple scoring method to identify patients at high risk of subsequent deficits 1–2 years after injury. Methods...

Purpose Recently introduced total knee arthroplasty (TKA) alignment strategies aim to restore the pre-arthritic alignment of an individual patient. The native alignment of a patient can only be restored with detailed knowledge about the native and osteoarthritic alignment as well as differences between them. The first aim of this study was to asses...

Purpose The purpose of this study was to investigate whether specific bone tracer uptake (BTU) patterns on preoperative SPECT/CT could predict which patients with varus alignment and medial overload would particularly benefit from medial opening-wedge high tibial osteotomy (MOWHTO). It was the hypothesis that an increased preoperative BTU relative...

Objectives To evaluate the impact of diagnostic nerve block and ultrasound findings on therapeutic choices and predict the outcome after concomitant surgery in patients with suspected neuropathy of the infrapatellar branch of the saphenous nerve (IPBSN). Methods Fifty-five patients following knee surgery with suspicion of IPBSN neuralgia were retr...

Purpose The main purpose of this study was to determine whether there is a correlation between the change of tibial tuberosity-trochlear groove (TT-TG) distance and clinical outcomes after total knee arthroplasty (TKA). Methods A total of 52 knees undergoing TKA due to primary osteoarthritis were included in this retrospective study. All patients...

Objectives To determine an injury pattern of knee structures along torn Kaplan fibers in ACL deficient knees and to observe the healing process of Kaplan fibers in ACL reconstructed knees. Methods A total of 101 knee MRIs obtained between January 2004 and April 2020 with full-thickness ACL tears were retrospectively assessed for visibility and imp...

Background Data is limited how well patient-reported longer-term outcome measures (PROMs) explain medically graded reduced capacity for work (RCW). Objective This prospective study investigates the association of RCW with several PROMs in addition to demographic and injury-related variables in significantly injured of working age. Methods Patient...

Purpose The diagnostic process in patients after painful total knee arthroplasty (TKA) is challenging. The more clinical and radiological information about a patient with pain after TKA is included in the assessment, the more reliable and sustainable the advice regarding TKA revision can be. The primary aim was to investigate the position of TKA co...

Objectives To evaluate the performance of a deep convolutional neural network (DCNN) in detecting and classifying distal radius fractures, metal, and cast on radiographs using labels based on radiology reports. The secondary aim was to evaluate the effect of the training set size on the algorithm’s performance. Methods A total of 15,775 frontal an...

Purpose: The purpose of this study was to describe the medial and lateral posterior tibial slope (MPTS and LPTS) on 3D-CT in a Caucasian population without osteoarthritis. It was hypothesised that standard TKA alignment techniques would not reproduce the anatomy in a high percentage of native knees. Methods: CT scans of 301 knees [male:female =...

Background The primary aim was to assess characteristics of pain in patients with ongoing pain after total knee arthroplasty (TKA). The secondary aim was to identify specific pain patterns and link these to underlying pathologies. Methods A prospectively collected cohort of 97 painful primary TKA patients was retrospectively evaluated. All patient...

Objective To compare the posterior condylar angle measured with Kanekasu radiograph and 2D-CT with the gold standard 3D-CT following primary total knee arthroplasty (TKA). Methods Eighty-two knees with pain following TKA were included in this retrospective study. Two independent raters measured the anatomical and surgical posterior condylar angles...

Objective The aim of this study was to determine the causes leading to a first revision of primary total knee arthroplasty (TKA) in a specialized knee centre and compare the results with previously published data. Methods Prospectively collected data of a consecutive number of 195 patients after primary TKA and who underwent first revision surgery...

Zusammenfassung Hintergrund Es galt herauszufinden, wie kostendeckend die Versorgung potenziell Schwerverletzter in einem Schweizer Traumazentrum ist, und inwieweit Spitalgewinne bzw. -verluste mit patientenbezogenen Unfall‑, Behandlungs- oder Outcome-Daten korrelieren. Methodik Analyse aller 2018 im Schockraum (SR) bzw. mit Verletzungsschwere Ne...

Background and objective: With respect to the resource and training requirements of a Swiss trauma center, we wanted to know how frequently relevant thoracic injuries occur and how often specialized thoracic surgery is needed. Material and methods: Retrospective analysis of all severely injured patients with a new injury severity score (NISS) ≥8...

Introduction About 20% of patients after total knee arthroplasty (TKA) are not satisfied nor pain free. After a challenging diagnostic workup it is not unusual that revision surgery becomes necessary. There is a general consensus that knee revision surgery should only be performed when the causes of the complaints are identified. In the clinical di...

PurposeTo investigate if the latest-generation cruciate-retaining total knee arthroplasty (CR-TKA) systems through more patella-friendly femoral trochlea reduce the patellar bone loading.Methods Twenty patients who underwent Attune CR-TKA were matched with twenty-one patients who underwent Press-Fit Condylar® (PFC) CR-TKA. The patella was always pr...

Objectives Assessment of postprocedural pain after minimal invasive treatment of unilateral incompetence of the great saphenous vein. Methods A total of 85 patients treated with endovenous laser ablation (1470 nm) in combination with foam sclerotherapy and evulsions reported postprocedural pain on a visual analogue scale (0–10) during 28 days afte...

Background Nearly all patients with spinal cord injury (SCI) suffer from neurogenic lower urinary tract dysfunction (NLUTD). Untreated NLUTD is a risk factor for renal damage and can significantly affect quality of life (QoL). Patients with SCI frequently use complementary medicine to alleviate symptoms, namely for urologic problems.Objectives We e...

Purpose According to the American College of Surgeons (ACS) recommendations, the benchmark for trauma center need (TCN) is an Injury Severity Score (ISS) > 15. In contrast, Swiss highly specialized medicine (HSM) regulations set out TCN for all patients with an ISS > 19 or an Abbreviated Injury Severity (AIS) of the head ≥ 3. This investigation ass...

PurposeThe primary aim of this study was to investigate the potential benefit of stress radiographs for diagnosis of unstable total knee arthroplasty (TKA) and to identify clinically relevant cut-off values to differentiate between unstable and stable TKAs.Methods Data of 40 patients with 49 cruciate retaining (CR) TKA who underwent stress radiogra...

Purpose: This systematic review aimed to evaluate the variability of patellofemoral (PF) alignment and trochlear morphology in osteoarthritic knees. Methods: PF alignment of the knee was defined by the following parameters: the sulcus angle (SA), femoral trochlear depth (FTD), patellar tilt angle (PTA), lateral patellofemoral angle (LPFA), later...

Objective The purpose of the study was to investigate if the TKA design (cruciate retaining (CR), posterior stabilized (PS), revision prostheses) had an influence on the bone tracer uptake (BTU) pattern at the origin of the popliteus muscle.Materials and methodsA total of 92 knees (male:female = 46:46) which had undergone prior TKA were included in...

Aims of the study: Given the lack of information on the relation between baseline patient, injury and treatment data and longer-term outcomes for survivors of significant trauma, the objective of this evaluation was to examine the degree to which these characteristics might predict working constraints and expenses. Methods: 1183 significantly in...

Purpose Collagen meniscal implants (CMI) have variable imaging findings on MRI and it remains ambiguous, if alterations may be present in asymptomatic patients. The aim was, to evaluate MR morphological characteristics and volume of CMI in the early, mid- and long-term follow-up. Methods Fifty-seven patients (mean age, 43.6±11 years; 41 male/16 fe...

Authors would like to add the below acknowledgement statement to the original article.

Purpose The primary purpose of this retrospective study with prospectively collected data was to evaluate the clinical value of SPECT/CT, in particular its impact on clinical diagnosis and patient management, in patients with pain, stiffness, or swelling after primary total knee arthroplasty (TKA). The secondary purpose was to determine the sensiti...

Purpose There is still lack of knowledge regarding the variability of patellofemoral alignment in healthy, non-osteoarthritic knees, without patellofemoral instability. Therefore, a systematic review of the existing literature was performed to evaluate the variability of patellofemoral alignment. Methods Patellofemoral alignment of the knee was de...

Background: Vein symptoms (VS) entail diffuse leg discomfort and pain coinciding with a perception of weighty or swollen legs. Their traditional classification as a form of venous disease may be inaccurate as they occur in patients with no or any venous disorder. We hypothesized that VS would emerge from a primordially standing associated perturbat...

Aims and Objectives About 20% of patients after total knee arthroplasty (TKA) are not satisfied nor pain free. After a challenging diagnostic workup it is not unusual that revision surgery becomes necessary. There is a general consensus that knee revision surgery should only be performed when the causes of the complaints are identified. In the clin...

Aims and Objectives It is a pertinent question if SPECT/CT is able to reflect the cartilage status of the knee. Hence, it was the purpose of this study to evaluate the correlation between maximal relative bone tracer uptake (mrBTU) of preoperative SPECT/CT and intraoperative findings of chondral lesions assessed with the International Cartilage Rep...

Purpose: There is a lack of knowledge about the joint line orientation of the femur and tibia in non-osteoarthritic knees. The primary purpose of the present study was to evaluate the orientation of the joint lines in native non-osteoarthritic knees using 3D-reconstructed CT scans. The secondary purpose was to identify knee phenotypes to combine th...

Background and Objectives.—Even though Switzerland has a compulsory insurance system, there is a lack of detailed information on the treatment and outcome following trauma. The objective of this evaluation was to examine to what extent cases insured by the largest accident-insurer (Suva) are representative of all significantly injured. Methods.—Tra...

Purpose The currently used system to classify the lower limb alignment (neutral, varus, valgus) does not consider the orientation of the joint line or its relationship to the overall lower limb alignment. Similarly, current total knee arthroplasty (TKA) alignment concepts do not sufficiently consider the variability of the native coronal alignment....

Zusammenfassung Einleitung Zur apparativen intermittierenden Kompression bei Ödemen aller Art sind hierzulande nur schenkellange Geräte, bzw. Hosen üblich. Wadenlange Geräte sind auf dem Markt, aber noch nicht auf ihre Wirksamkeit untersucht. Die Studie vergleicht die Wirksamkeit schenkellanger vs. knielanger Entstauungsstiefel auf Volumenreduktion...

Purpose: There is a lack of knowledge about coronal alignment variability in osteoarthritic knees. Therefore, the purpose of this article was to systematically review the literature and collect data about the lower limb alignment including hip-knee-ankle angle (HKA), femoral mechanical angle (FMA), tibial mechanical angle (TMA) and the joint line c...

Purpose Coronal alignment of the knee is defined by the hip–knee–ankle angle (HKA), the femoral mechanical angle (FMA), the tibial mechanical angle (TMA), and the joint line convergence angle (JLCA). To date, there is still a lack of knowledge about the variability of native coronal knee alignment. The purpose of this paper is to present a systemat...

Background: The study aim was to evaluate patient progress over time, given the limited knowledge available on gender-dependent longer-term outcomes after major trauma. Materials and methods: This is a prospective longitudinal survey of consecutive trauma survivors with a New Injury Severity Score ≥8, comparing working capacity and outcome score...

Purpose: There is a lack of knowledge about the native coronal knee alignment in 3D. The currently used classification system (neutral, valgus and varus) oversimplifies the coronal knee alignment. The purpose of this study was therefore (1) to investigate the coronal knee alignment in non-osteoarthritic knees using 3D-reconstructed CT images and (2...

Objective To evaluate the differences of bone tracer uptake (BTU) in symptomatic and asymptomatic contralateral knees in patients after reconstruction of the anterior cruciate ligament (ACL-R) and to identify typical BTU patterns and threshold values to differentiate pathological from physiological BTU. Methods 53 patients after unilateral ACL-R w...

Background: No consensus exists in the literature on the use of uniform emergency room trauma team activation criteria (ERTTAC). Today excessive over- or undertriage rates continue to be a challenge for most trauma centres. Application of ERTTAC, published for use in the German TraumaNetwork DGU®, at a Swiss trauma centre resulted in a high overtr...

The question if bone tracer uptake in SPECT/CT reflects the intraoperative cartilage status of the knee is still unanswered. In this study, thirty‐three consecutive patients (male:female = 11:22; mean age ± standard deviation 61 ± 15) with bi‐ or tri‐compartmental knee osteoarthritis who underwent SPECT/CT before total knee arthroplasty (TKA) were...

Introduction: The increasing number of older trauma patients has provoked a debate on the need for subsequent rehabilitative therapy for the elderly. Our findings revealed a lack of detailed data on this topic so we became interested in the effective differences in the longer-term outcomes for older and younger major trauma patients with TBI. As v...

Purpose The tibial tubercle–trochlear groove distance (TT–TG) is an established measurement to assist diagnosis and treatment of patellofemoral instability. However, little is known about the distribution of TT–TG in osteoarthritic knees. The purpose of the current study is to investigate the TT–TG in a large cohort of osteoarthritic knees and to a...

Purpose The tibial tubercle-trochlear groove distance (TT-TG) is an established measurement to assist diagnosis and treatment of patellofemoral instability. However, little is known about the distribution of TT-TG in osteoarthritic knees. The purpose of the current study is to investigate the TT-TG in a large cohort of osteoarthritic knees and to a...

Abstract Background The Quality of Life after Brain Injury (QOLIBRI) score was developed to assess disease-specific health-related quality of life (HRQoL) after traumatic brain injury (TBI). So far, validation studies on the QOLIBRI were only conducted in cohorts with traumatic brain injury. This study investigated the longer-term residuals in seve...

Objectives: The aims of this study were to assess feasibility, image quality, and radiation dose and to estimate the optimal dose protocol for the lumbar spine of cadaveric specimens with different body mass indices (BMIs) in the upright position using a prototype 3-dimensional cone-beam computed tomography (CT) software implemented on a robotic x...

Objective: The application of head-to-hip computed tomography in the emergency treatment of potential polytrauma (PTCT) is still under debate. Given the conflicting data in the literature, we analysed our own experience for effective benefits and limitations in the use of this diagnostic tool. Methods: Retrospective analysis of all emergency trauma...

Aims and Objectives The purpose of this study was to investigate if the type of approach (medial parapatellar approach (MPA) versus lateral parapatellar subvastus approach with tibial tubercle osteotomy (LPA)) influences the rotation of femoral and/or tibial component and leg axis in total knee arthroplasty (TKA). Materials and Methods This study...

Aims and Objectives Purpose of the study was to investigate if the fixation technique for intramedullary stems in total knee arthroplasty revisions (rTKA), influence the alignment of the components, leg axis and the rates of complications, reoperations and revisions. Materials and Methods Sixteen patients with cemented tibial stems (Group C) and t...

Aim Against the background of conflicting data on the topic, this study aimed to determine the differences in longer-term patient outcomes following major trauma with regard to age. Materials and methods A prospective trauma center survey of survivors of trauma (≥16 years) was carried out employing a New Injury Severity Score (NISS) ≥8 to investig...

Objectives: To assess the relationship of subchondral bone tracer uptake (BTU) on SPECT/CT and meniscal pathologies on MRI in patients with painful knees. Methods: Twenty-five patients who had MRI and SPECT/CT within 3 months without knee surgery or grade ≥3 cartilage lesions were prospectively included. Maximum values of each subchondral femoro...

Objective: Injuries at the calcaneocuboid and talonavicular joint have been described as two distinct, unrelated entities in the radiology literature. Our purpose was to assess the coexistence of these injuries using radiography and MRI and to correlate our findings with radiologic and clinical diagnoses. Materials and methods: Twenty-one patien...

Background Recurrent urinary tract infections (UTIs) are one of the most common morbidities in persons with neurogenic lower urinary tract dysfunction (NLUTD). Repetitive antibiotic treatment increases the risk of selecting multi-resistant bacteria. Homeopathic treatment has been reported to be effective in these patients. The mechanism of action,...

Phantom-based initial performance assessment of a prototype three-dimensional (3-D) x-ray system and comparison of 3-D tomography with computed tomography (CT) were proposed. A 3-D image quality phantom was scanned with a prototype version of 3-D cone-beam CT imaging implemented on a twin robotic x-ray system using three trajectories (163 deg = tab...

Background: The influence of the surgical approach on the position of the prosthetic components in revision of total knee arthroplasties (rTKA) is still not clear. This study compared the medial parapatellar approach (MPA) and lateral parapatellar subvastus approach with tibial tubercle osteotomy (LPA). Methods: Forty-two consecutive patients un...

Purpose: The primary purpose of this study was to compare bone tracer uptake (BTU) on SPECT/CT in symptomatic and asymptomatic total hip arthroplasty (THA) and identify a possible relationship between BTU patterns and patient's symptoms. The secondary purpose was to investigate if the fixation methods (cemented versus uncemented) lead to different...

Screening in a standardized manner for osteoporosis in non-vertebral fracture patients aged 50 and older independently of both gender and level of trauma energy yielded the indication for osteoporotic therapy for every fourth male high-energy fracture patient. PurposeThis study aimed to identify the rate of osteoporosis in patients of both genders...

Purpose: The optimal coronal alignment is still under debate. However, in most of the studies, alignment was only assessed using radiographs, which are not accurate enough for assessment of tibial and femoral TKA position. The primary purpose of this study was to assess the relationship between coronal TKA alignment using 3D-reconstructed CTs and...

Purpose: Most of the clinical outcome studies dealing with ACL repair are from the developer's perspective. It is a fact that these developer-initiated studies tend to interpret the results rather in favour than against their developed technique or product. Hence, it was the purpose of the present independent investigator-initiated study to invest...

AIMS OF THE STUDY According to current evidence, one out of ten fracture patients with osteoporosis does not sustain another fracture if he or she is on adequate medication. However, epidemiological surveys show that only about 15 to 30% of affected patients avail themselves of the treatments. This cohort study investigated how many fracture patie...

Purpose: As patellar tracking and loading is influenced by tibial tuberosity and trochlear groove (TT-TG) distance, patellar height, thickness and tilt as well as TKA component position, it was our hypothesis that these parameters significantly correlate with patellar BTU intensity and localization in SPECT/CT. The purpose of the study was to inve...

Purpose: The purpose of this study was to investigate if the type of approach [medial parapatellar approach (MPA) versus lateral parapatellar approach with tibial tubercle osteotomy (LPA)] influences rotation of femoral and/or tibial component and leg axis in total knee arthroplasty (TKA). It was the hypothesis that MPA leads to an internally rota...

Purpose: Magnetic resonance imaging (MRI) and single-photon emission computerised tomography/computerised tomography (SPECT/CT) are used as diagnostic tools in symptomatic patients after reconstruction of the anterior cruciate ligament (ACL). The benefit of SPECT/CT in comparison with MRI is under debate. The purpose of this study was to investiga...

Objectives: Simulation-based medical training is associated with superior educational outcomes and improved cost efficiency. Self- and peer-assessment may be a cost-effective and flexible alternative to expert-led assessment. We compared accuracy of self- and peer-assessment of untrained raters using basic evaluation tools to expert assessment usi...

Introduction: Although the life expectancy of patients with spinal cord injury (SCI) has improved considerably, the various secondary complications severely impair the quality of life of the affected persons. Unfortunately, the conventional therapy of these complications is often not entirely successful. Therefore, many SCI patients use complementa...

Schlüsselwörter: CHIVA, endoluminale Lasertechnik, VNUS ClosureFast™, Veneninsuffizienz, Vena saphena magna, VSM Einleitung: Das CHIVA-Verfahren wird seit seiner Beschreibung klassischerweise mit chirurgischer Technik ausgeführt. Nach Einführung der endoluminalen Verfahren stellt sich die Frage, ob diese Techniken auch bei der CHIVA-Strategie zum E...

Mean scores for dizziness at baseline and after each study period. Notes: “First” refers to the group who wore the compression stockings during the first 2 weeks of the 4-week study. “Second” refers to the group who wore the compression stockings during the final 2 weeks of the 4-week study.

PUQE scores over time. Notes: The black dashed line represents a reported value for women with NVP.3 “First” refers to the group who wore the compression stockings during the first 2 weeks of the 4-week study. “Second” refers to the group who wore the compression stockings during the final 2 weeks of the 4-week study. Abbreviations: NVP, nausea and...

Introduction This study aimed to assess the impact of wearing compression stockings on women’s quality of life (QoL) associated with nausea and vomiting in early pregnancy (NVP). Methods In this randomized, open, single-center, crossover study, 74 women were assigned 1:1 to 2 weeks with compression stockings followed by 2 weeks without or vice ver...

Background Heterotopic ossification (HO) is a well-known complication after total hip arthroplasty (THA).Recently, the trend is to operate THA minimally invasive being less traumatic than standard approaches and promising a faster return to activity. The purpose of the study was to investigate if minimal invasive surgery (MIS), leads also to less H...

Introduction: Since it’s description the CHIVA strategy was performed with surgical techniques. After the introduction of endoluminal heat techniques these might be applied also in the CHIVA context. Method: 104 patients were investigated before and 3–6 months after the treatment of the great saphenous vein (GSV) with CHIVA strategy using enolumina...

Purpose: The aim of this study was to evaluate femoral and tibial as well as whole leg coronal TKA alignment using 3D-reconstructed CTs and to assess the relationship of coronal TKA alignment and clinical outcome in a large prospective series of patients. It was hypothesized that a coronal deviation of TKA position and leg alignment from the mecha...

Background: The purpose of the study was to evaluate the intra- and inter-observer reliabilities of the Genovese grading on MRI in patients after collagen meniscus substitution. Methods: 84 MRI images of 74 consecutive patients who underwent partial meniscus substitution using collagen meniscus implant (CMI) were assessed. MRIs were evaluated us...

Background and objectives: The potential association of external factors such as time of day, lunar phases or specific weather conditions on the daily management and outcome of trauma emergencies remains under debate. We undertook this trauma centre investigation to detect possible worthwhile factors of influence in order to optimize the organizat...

Purpose: The purpose of the study was to compare the rate of secondary resurfacing in a consecutive series of five different total knee arthroplasty (TKA) systems. It was our hypothesis that different TKA design features such as sulcus angle or trochlear height influence the rate of secondary resurfacing. Methods: A retrospective study was perfo...

Background: In the daily office setting, flow and reflux in leg veins is assessed to investigate patients with chronic venous disease. Valsalva manoeuvre and manual calf compression and release are frequent manoeuvres used to elicit blood flow in leg veins. Toe elevation manoeuvre (TEM) was proposed as a further alternative to provoke blood flow i...

Objective: The core symptoms of venous disease include leg discomfort or pain accompanied by sensations of heavy, weighty, or swollen legs. This suggests the presence of a cause and effect relationship between swelling and pain, resulting in the assumption that a venous disorder is responsible. The aim of this study was to investigate the relation...

Purpose The primary purpose of this retrospective study was to evaluate the differences of bone tracer uptake (BTU) in symptomatic and asymptomatic knees after bilateral total knee arthroplasty (TKA) and identify typical BTU patterns with regards to TKA component position and alignment. Methods A consecutive number of 37 patients after bilateral TK...

Background In Germany, therapy with medical compression stockings (MCS) relies almost completely on stockings exerting an ankle pressure of 23-32 mmHg. There is, however, strong evidence that MCS exerting a pressure <20 mmHg are at least as effective offering great advantages in use. Methods We expanded prolonged standing to a stress test. The lowe...

Background Great saphenous vein (GSV) incompetence is involved in the majority of cases of varicose disease. Stratification of venous disease severity is still difficult. This study aims to correlate GSV diameters with C of CEAP and the venous clinical severity score (VCSS). Methods Legs without GSV reflux (Control legs, Group 1) and legs with untr...