Clarisa Simon Perez

• Doctor of Medicine
• licenciado especialista traumatologia at Hospital Clínico Universitario de Valladolid

Introduction This study aimed to evaluate the impact of infographics and social media threads (SMT) on academic performance in the Musculoskeletal Medical and Surgical Pathology (MMSP) course. Additionally, gender differences in the effectiveness of these tools were examined. Methods A within-subject educational intervention study was conducted ov...

Postoperative ulnar neuropathy is a common complication in patients undergoing surgery for distal humerus fractures, particularly when open reduction and internal fixation (ORIF) is performed. Objectives: This study aims to compare the rates of ulnar nerve neuropathy following classic in situ decompression versus ulnar nerve subcutaneous anterior t...

Background Trapeziometacarpal (TMC) osteoarthritis is the most prevalent osteoarthritis of the upper limb. It is one of the most disabling conditions. Currently, the most suitable surgical technique is debated. Trapeziectomy with ligamentoplasty continues to be the gold standard; however, results for function, esthetics, and quality of life have no...

Background: Hip fractures are prevalent among the elderly and impose a significant burden on healthcare systems due to the associated high morbidity and costs. The increasing use of intramedullary nails for hip fracture fixation has inadvertently introduced risks; these implants can alter bone elasticity and create stress concentrations, leading to...

Aims To assess the survival function of cementless total trapezium metacarpal prostheses (TTMPs) at 20 years, to compare survival functions by trapezium size, and to evaluate the association between the instantaneous risk of TTMP failure and small trapezium size using a multivariate Cox regression model. Methods This observational cohort study inc...

Objective To present the functional results obtained and the possible surgical difficulties after the surgical treatment of Dupuytren’s disease (DD) recurrence in patients previously treated with Clostridium histolyticum (CCH) collagenase. Materials and methods In this prospective study, 178 patients with DD were treated with CCH from 2011 to 2018...

Introduction: Interest in 3D printing for orthopedic surgery has been increasing since its progressive adoption in most of the hospitals around the world. The aim of the study is to describe all the current applications of 3D printing in patients undergoing hip surgery of any type at the present time. Materials and Methods: We conducted a systemati...

Patient: Female, 28-year-old Final Diagnosis: Congenital heart disease • Down’s syndrome • flat foot • hallux valgus Symptoms: Foot pain • knee joint pain • low back and hip pain, gait changes, proximal muscle weakness Clinical Procedure: — Specialty: Podiatry • Surgery Objective Congenital defects/diseases Background Tarsometatarsal joint (TMJ)...

Background The 2015 Lancet Commission on global surgery identified surgery and anaesthesia as indispensable parts of holistic health-care systems. However, COVID-19 exposed the fragility of planned surgical services around the world, which have also been neglected in pandemic recovery planning. This study aimed to develop and validate a novel index...

Background Clinical management in orthogeriatric units and outcome indicators are similar for extracapsular fragility hip fractures, without discriminating between subtrochanteric and pertrochanteric fractures. Hypothesis Geriatric patients, 75 years or older, with subtrochanteric fractures have worse clinical and functional outcomes than those wi...

Background The 2015 Lancet Commission on global surgery identified surgery and anaesthesia as indispensable parts of holistic health-care systems. However, COVID-19 exposed the fragility of planned surgical services around the world, which have also been neglected in pandemic recovery planning. This study aimed to develop and validate a novel index...

Background The 2015 Lancet Commission on global surgery identified surgery and anaesthesia as indispensable parts of holistic health-care systems. However, COVID-19 exposed the fragility of planned surgical services around the world, which have also been neglected in pandemic recovery planning. This study aimed to develop and validate a novel index...

Background The 2015 Lancet Commission on global surgery identified surgery and anaesthesia as indispensable parts of holistic health-care systems. However, COVID-19 exposed the fragility of planned surgical services around the world, which have also been neglected in pandemic recovery planning. This study aimed to develop and validate a novel index...

Background The 2015 Lancet Commission on global surgery identified surgery and anaesthesia as indispensable parts of holistic health-care systems. However, COVID-19 exposed the fragility of planned surgical services around the world, which have also been neglected in pandemic recovery planning. This study aimed to develop and validate a novel index...

Background The 2015 Lancet Commission on global surgery identified surgery and anaesthesia as indispensable parts of holistic health-care systems. However, COVID-19 exposed the fragility of planned surgical services around the world, which have also been neglected in pandemic recovery planning. This study aimed to develop and validate a novel index...

Background The 2015 Lancet Commission on global surgery identified surgery and anaesthesia as indispensable parts of holistic health-care systems. However, COVID-19 exposed the fragility of planned surgical services around the world, which have also been neglected in pandemic recovery planning. This study aimed to develop and validate a novel index...

Background The 2015 Lancet Commission on global surgery identified surgery and anaesthesia as indispensable parts of holistic health-care systems. However, COVID-19 exposed the fragility of planned surgical services around the world, which have also been neglected in pandemic recovery planning. This study aimed to develop and validate a novel index...

Background The 2015 Lancet Commission on global surgery identified surgery and anaesthesia as indispensable parts of holistic health-care systems. However, COVID-19 exposed the fragility of planned surgical services around the world, which have also been neglected in pandemic recovery planning. This study aimed to develop and validate a novel index...

SARS-CoV-2 has been associated with an increased rate of venous thromboembolism in critically ill patients.Since surgical patients are already at higher risk of venous thromboembolism than general populations, thisstudy aimed to determine if patients with peri-operative or prior SARS-CoV-2 were at further increased risk ofvenous thromboembolism. We...

Supervised, center-based, daily physiotherapy presents limitations: transport, need for an accompanying person, or risk of infection. Home-based rehabilitation protocols (HBRP) can be effective alternatives. We use a HBRP for the non-surgically treated proximal humeral fractures (PHF) in older patients. Objectives To assess patient satisfaction an...

Trapeziometacarpal osteoarthritis (TMCOA) is a highly prevalent disease in the older population. Many different types of surgical treatments are possible, depending on the degree of joint involvement, the personal and professional circumstances of the patient and the preferences of the orthopedic surgeon. This paper evaluated the clinical and radio...

Peri-operative SARS-CoV-2 infection increases postoperative mortality. The aim of this study was to determine the optimal duration of planned delay before surgery in patients who have had SARS-CoV-2 infection. This international, multicentre, prospective cohort study included patients undergoing elective or emergency surgery during October 2020. Su...

Introduction : The aim of this study was to determine the feasibility of applying the MIPO technique with a helical-shaped plate in the treatment of humeral shaft fractures with proximal extension. Patients and methods : We present an observational prospective study of patients with a humeral shaft fracture involving the proximal humerus fixed wit...

Purpose: Evaluate the Scratch Collapse Test in an objective way, by replacing the subjective evaluation made by the physician with an objective evaluation measure, made with a digital dynamometer. Methods: Observational study carried out, in 90 patients divided into three groups of 30 patients, taking into account the electromyographic study of the...

A total of 32 (12.5%) thumbs were treated with trapeziometacarpal osteoarthritis and moderate metacarpophalangeal hyperextension (30º-50º), placing the Arpe ® implant and sesamoid arthrodesis of the metacarpophalangeal joint in the metacarpal bone head. In 28 patients were treated with radial sesamoid arthrodesis at the metacarpal head and 4 patien...

A total of 32 (12.5%) thumbs were treated with trapeziometacarpal osteoarthritis and moderate metacarpophalangeal hyperextension (30º-50º), placing the Arpe ® implant and sesamoid arthrodesis of the metacarpophalangeal joint in the metacarpal bone head. In 28 patients were treated with radial sesamoid arthrodesis at the metacarpal head and 4 patien...

METHODS 62 diabetic patients, 58 with type 2 and 4 with type 1 (average age 63.35 years) were included. Records of foot deformities were included; A range of motion test of the ankle joint was used to determine the degree of stiffness. An exploratory analysis of the association of foot position and the degree of rigidity was performed. RESULTS The...

Charcot’s neuroarthropathy is recognized as a destructive, progressive and non-infectious disease of multifactorial origin inpatients with diabetes mellitus as the main etiological cause. This destruction can be at different levels of the foot. This articlepresents a clinical case of a patient suffering from a severe rigid varus foot deformity seco...

We report outcomes of 228 consecutive patients with total joint arthroplasty using the Arpe® prosthesis, among which 216 trapeziometacarpal joints in 199 patients had a minimum of 10 years follow-up. The cumulative survival rate of the 216 implants at 10 years using the Kaplan–Meyer method was 93%. Two hundred joints were functional and painless. W...

Background: Nonoperative management of proximal humeral fractures (PHFs) is the most common treatment, but its functional outcome may improve with early mobilization. In frail osteoporotic patients, quick recovery of prefracture independency is mandatory. This study assessed fracture displacement in PHFs managed with conservative treatment after e...

Aim of the study: The purpose of this study was to determine the recurrence rate, possible adverse reactions and factors influencing recurrence and progression of Dupuytren's disease (DD) treated with Collagenase from Clostridium histolyticum (CCH). Method: This was a prospective study of 71 patients with DD treated with CCH from 2011 to Februar...

Objective The aim of this study is to show the results of scaphotrapeziotrapezoid (STT) joint osteoarthritis treatment performing resurfacing arthroplasty with scaphoid anchorage. Material and method An observational, descriptive and retrospective study was performed. Ten patients with isolated STT joint osteoarthritis were studied between 2013 an...

Objective: The aim of this study is to show the results of scaphotrapeziotrapezoid (STT) joint osteoarthritis treatment performing resurfacing arthroplasty with scaphoid anchorage. Material and method: An observational, descriptive and retrospective study was performed. Ten patients with isolated STT joint osteoarthritis were studied between 201...

Introduction When a nerve section with a significant gap occurs, it is necessary to use a prosthesis to suture it. To date an autologous nerve segment graft appears to be the best treatment; but it has several important disadvantages. Our goal is to study the effectiveness of an isogenic acellular nerve prosthesis comparing a simple suture with tub...

Introduction: When a nerve section with a significant gap occurs, it is necessary to use a prosthesis to suture it. To date an autologous nerve segment graft appears to be the best treatment; but it has several important disadvantages. Our goal is to study the effectiveness of an isogenic acellular nerve prosthesis comparing a simple suture with t...

Until a few years ago it was not given any definitive therapeutic solution to the Trapezio-methacarpal joint osteoarthritis (TMCJ OA). The first surgical solutions were simple and consisted of removal of the trapeze (trapezectomy). Afterwards, it came some procedures based in ligamentents reconstruction and tendon interposition (LRTI); these, use d...

Introduction: In the context of axon regeneration, certain molecules containing the basal lamina, particularly fibronectin, laminin and heparin sulfate promote axonal elongation in vitro and in vivo. This structure could lead the axons to distal stump in nerve defect repair. Material and Methods: In twenty male Wistar rats, a critical defect of 15...

Introducción: La tenosinovitis estenosante de los flexores de la mano es una patología que conduce al bloqueo de la polea de flexión proximal del dedo. Aunque el tratamiento inicial es conservador, si éste no es efectivo, está indicado el tratamiento quirúrgico mediante liberación abierta o percutánea. Material y método: Estudio descriptivo retrosp...

Objetive: The trapezio-metacarpal arthritis is a disabling disease that causes pain, decreased strength, loss of ability in the clamp and limited movement of the thumb. When medical treatment fails surgery can be performed in multiple ways. One of those may be prosthesis. From May 1999 to April 2004 were performed, consecutively, a total of 116 tot...

Purpose: Our purpose is to describe the results obtained in surgical treatment of a series of patients with symptoms of radial tunnel syndrome. Methods: We performed a prospective study on 42 patients (43 limbs) operated for radial tunnel syndrome between 1996 and 2010, using a posterior-external approach. Results: Using the Roles and Maudsley...

Aim The aim of the study was to evaluate the clinical and radiological results obtained in the treatment of carpal scaphoid non-union treated at the University Hospital of Valladolid using the Fisk Fernandez technique. Material and methods A review was performed on 43 cases of surgically treated non-union using Fisk Fernandez technique with a mini...

Objetivos: La tenosinovitis estenosante de los flexores de la mano es una patología muy frecuente en el ámbito laboral. Se han descrito distintos tratamientos de tipo conservador, aunque el tratamiento definitivo de los casos que no responden a otros tratamientos es quirúrgico, siendo la técnica abierta y la liberación percutánea las dos técnicas d...

The aim of the study was to evaluate the clinical and radiological results obtained in the treatment of carpal scaphoid non-union treated at the University Hospital of Valladolid using the Fisk Fernandez technique. A review was performed on 43 cases of surgically treated non-union using Fisk Fernandez technique with a minimum of 6 months follow-up....

The concept of day surgery is becoming an increasingly important part of elective surgery worldwide. Relentless pressure to cut costs may constrain clinical judgment regarding the most appropriate location for a patient's surgical care. The aim of this study was to determine clinical and quality indicators relating to our experience in orthopedic d...

The collagenase from Clostridium histolyticum is a new therapeutic option, and the first pharmacological one, in the treatment of Dupuytren's disease. A prospective study was conducted on 35 patients with Dupuytren's disease. The clinical and functional variables, as well as patient satisfaction and drug safety were evaluated. The functional and cl...

This project aims to study the regeneration of non-repairable lesions of peripheral nerve by muscle grafts enhanced with growth factors. The experiment was carried out in two phases. The first one compared direct suture of a critical defect in the sciatic nerve of ten rats, with the interposition of autologous muscle graft, denatured by heat, in an...

IntroductionThis project aims to study the regeneration of non-repairable lesions of peripheral nerve by muscle grafts enhanced with growth factors.Material and methodsThe experiment was carried out in two phases. The first one compared direct suture of a critical defect in the sciatic nerve of ten rats, with the interposition of autologous muscle...

El siringoma condroide (SC) es un tumor muy infrecuente de origen epitelial, por lo general benigno. Clínicamente se presenta en la cabeza y cuello y se caracteriza por ser un tumor subcutáneo o intradérmico, de consistencia firme. El diagnóstico definitivo se establece mediante el estudio anatomopatológico. El tratamiento consiste en la exéresis q...

El osteoma osteoide es un tumor óseo benigno poco frecuente en la muñeca. Se caracteriza por la aparición de dolor inespecífico sin relación con actividades, que empeora por la noche y mejora con la administración de ácido acetilsalicílico. Su diagnóstico se basa en la clínica y en las pruebas se imagen, fundamentalmente en la TAC y la RM. El trata...

Purpose: To expound our experience of percutaneous screw fixation in the treatment of certain hand fractures. Materials and methods: We carried out a prospective study between November 2002 and November 2006, in which 84 patients with hand fractures were treated by means of closed screw osteosynthesis. The injury was located at the base of the firs...

PurposeTo expound our experience of percutaneous screw fixation in the treatment of certain hand fractures.Materials and methodsWe carried out a prospective study between November 2002 and November 2006, in which 84 patients with hand fractures were treated by means of closed screw osteosynthesis. The injury was located at the base of the first met...

Los hibernomas son tumores benignos raros, derivados de la grasa parda la cual se observa en el feto y los animales que hibernan. En la mayoría de los casos se presenta como una masa de crecimiento lento y poco dolorosa en las regiones donde persiste este tipo de grasa en el adulto, como la región interescapular, tórax, retroperitoneo, axila e ingl...

Se presenta un estudio prospectivo protocolizado de los resultados obtenidos tras el tratamiento quirúrgico de la artrosis trapecio-metacarpiana mediante la artroplastia total no cementada tipo ARPE®. Ciento cuarenta artroplastias tipo ARPE® fueron colocadas en 126 pacientes. Ciento treinta y dos muñecas corresponden a mujeres (94,3%) y 8 a hombres...

Desde 1996 a 2003, 25 pacientes (26 extremidades) fueron intervenidos de síndrome del túnel radial. Todos los procedimientos fueron realizados por el mismo cirujano y en el mismo hospital realizando un abordaje postero-externo del túnel radial. Se realizó un seguimiento de todos los pacientes en el tiempo después de la cirugía de 4 meses a 6 años y...

Knowledge of the anatomy of distal fractures of the radius is a fundamental requirement for fully understanding these injuries and planning treatment. Throughout history, various classifications have been made, based variously on the mechanism of production, imaging findings, displacement of fragments, communication, and others factors. The most co...