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Fracturas de Miembro Superior: Introducción y Conceptos Clave

Introducción a la Clase

• El instructor da la bienvenida a los participantes y menciona que el tema de la clase es sobre fracturas del miembro superior, un área de su especialidad en traumatología.

• Se observa que no todos los estudiantes están presentes, pero se decide comenzar la clase para que los demás se incorporen progresivamente.

Presentación del Tema

• El instructor comparte su pantalla para mostrar diapositivas relacionadas con el tema y solicita retroalimentación sobre cualquier problema técnico.

• Con más de 26 años de experiencia como profesor, el instructor ha impartido este curso varias veces al año, abordando tanto aspectos teóricos como prácticos.

Clasificación y Diagnóstico de Fracturas

Tipos Comunes de Fracturas

• Se mencionan casos específicos como luxaciones del hombro y fracturas esporádicas de clavícula. Se destaca la importancia del diagnóstico adecuado basado en la historia clínica.

Importancia del Examen Clínico

• La evaluación clínica es crucial para determinar el mecanismo de lesión y las posibles complicaciones asociadas a las fracturas.

• Las imágenes radiológicas son esenciales para confirmar diagnósticos; se presenta un caso claro de una luxación-fractura del hombro.

Tratamiento y Complicaciones

Reducción Anatómica

• Se enfatiza que las fracturas articulares requieren reducción anatómica y estabilidad absoluta para permitir una movilidad temprana adecuada.

Riesgos Asociados

• Las fracturas expuestas tienen un mayor riesgo de complicaciones como retardo en la consolidación o no unión. Un caso clínico ilustra cómo una caída puede causar separación significativa en huesos.

Clasificación según Altman

Clasificación Simple

• La clasificación propuesta por Altman divide las fracturas en tercio medio, lateral e interior, considerando también la cintura escapular.

Consecuencias Estructurales

• Un acortamiento en la estructura ósea puede llevar a disquinesia escapular, manifestándose como escápula alada con dolor asociado.

Indicaciones Quirúrgicas

Criterios para Cirugía

• Se discuten indicaciones quirúrgicas específicas para fracturas expuestas o desplazamientos significativos (más de dos centímetros).

Lesiones Asociadas

• También se abordan lesiones acromioclaviculares y sus implicancias quirúrgicas, así como complicaciones potenciales durante el tratamiento.

Fracturas Proximales del Húmero

Anatomía Relevante

• Es fundamental conocer la anatomía vascular relacionada con el húmero proximal; lesiones pueden comprometer circulación sanguínea vital.

Necrosis Aséptica

• Si hay falta de circulación tras una fractura en esta área, puede resultar en necrosis aséptica, lo cual complica aún más el tratamiento quirúrgico.

Diagnóstico Radiológico

Evaluación Radiológica

• Para diagnosticar adecuadamente las fracturas se requiere realizar placas radiográficas desde múltiples incidencias. Esto ayuda a identificar cuántos fragmentos óseos están involucrados.

Signo Clínico Importante

• Se menciona el signo clínico conocido como "signo de Heineken", relacionado con equimosis posterior a una fractura proximal del húmero.

Este formato proporciona un resumen estructurado y accesible sobre los temas tratados durante la clase sobre fracturas del miembro superior.

Fracture Classification and Treatment Approaches

Understanding Fracture Types

• The classification of NIR fractures is based on four parts: the head, greater tubercle (troquíter), lesser tubercle (troquín), and diagnosis. Identification typically requires X-ray imaging or CT scans.

• Conservative treatment is applicable only for non-displaced surgical neck fractures. It's crucial to differentiate between anatomical and surgical neck fractures for appropriate management.

Surgical Interventions

• Open reduction and internal fixation are indicated for displaced two to three-part fractures, while prosthetic replacement is necessary for any fracture involving the anatomical neck.

• Surgical treatments often utilize plates to stabilize bones during fracture reduction; intraosseous sutures can enhance stability before plate application.

Indications for Prosthesis

• Prosthetic intervention is recommended for elderly patients with poor bone quality, significant rotator cuff injuries, severe osteoporosis, or four-part fractures.

• Split fractures with over 40% depression of the head may lead to non-viability; timely and proper planning in emergency settings can prevent unnecessary prosthetic placement.

Complications and Considerations

• Inadequate planning during emergency procedures can result in complications such as avascular necrosis if blood supply is compromised post-reduction.

• Split head fractures typically necessitate a partial or reverse prosthesis due to their complex nature.

Advanced Techniques in Prosthetics

• Reverse prostheses place the glenosphere on the scapula while positioning the artificial glenoid on the humerus, optimizing force distribution and reducing stress on surrounding muscles.

• Ongoing research into screw-cement techniques shows mixed results regarding efficacy compared to traditional implants; accurate diagnosis remains critical for successful outcomes.

Importance of Imaging in Diagnosis

Diagnostic Imaging Techniques

• Accurate imaging through X-rays and CT scans is essential for diagnosing fracture types, particularly those involving the anatomical neck where viability must be assessed prior to surgery.

Rehabilitation Strategies

• Early rehabilitation following fixation aims at restoring mobility; constructs must allow sufficient movement without compromising healing processes.

Mechanisms of Humeral Fractures

Causes of Humeral Fractures

• Humeral asphyxiating fractures often arise from high-energy trauma such as falls or accidents; understanding these mechanisms aids in prevention strategies.

Classification Systems

• The AO classification system categorizes humeral fractures by type—transverse, oblique, spiral—and helps guide treatment decisions based on specific characteristics observed during imaging.

Surgical Considerations

• Non-surgical options are viable when dealing with low-energy angular displacements under certain conditions; however, careful monitoring is required throughout recovery phases.

Outcomes of Treatment Approaches

Evaluating Treatment Efficacy

• While conservative treatment may lead to shoulder stiffness post-fracture healing, surgical interventions can expedite recovery but come with their own risks.

Case Studies

• A case study illustrates successful outcomes using MIPO techniques that distribute forces effectively across fractured areas while preserving periosteal integrity.

Surgical Indications and Considerations in Humeral Fractures

Understanding Surgical Indications

• Key surgical indications include exposed fractures, floating elbow injuries, vascular damage, bilateral fractures, multiple myomas, and secondary radial nerve injuries.

Post-Manipulation Complications

• After manipulation or reduction of a fracture without radial nerve injury, the presence of paralysis indicates potential nerve entrapment at the fracture site.

Risks Associated with Surgical Treatment

• Not all fractures require surgery due to associated risks such as infection (controlled at 5%) and permanent radial nerve paralysis.

Techniques for Treating Fractures

• Various techniques discussed include external fixation, open reduction, internal fixation, and intramedullary nails. The focus is on minimizing complications related to radial nerve injury.

Challenges in Humeral Fracture Surgery

• The primary concern with humeral shaft fractures is radial nerve injury; surgical interventions carry a complication rate of approximately 20%.

Minimally Invasive Techniques vs. Traditional Approaches

Preference for Minimally Invasive Techniques

• There is a preference among some surgeons for minimally invasive techniques over traditional methods that may involve extensive dissection around the rotator cuff.

Case Study: Yanela's Injury

• A case study involving a patient named Yanela illustrates the complexities of treating high-energy distal humeral fractures during the pandemic.

Use of External Fixation

• Due to contamination concerns during surgery, provisional external fixation was employed successfully while maintaining good functional outcomes.

Imaging and Follow-Up in Fracture Management

Importance of Tomography

• Tomography plays a crucial role in assessing fracture healing by visualizing callus formation and cortical restoration post-surgery.

Monitoring Healing Progress

• Continuous monitoring through X-rays helps identify issues like refracture or inadequate union during recovery phases.

Decision-Making in Surgical Interventions

Factors Influencing Treatment Decisions

• Treatment decisions are influenced by patient characteristics (age), fracture specifics (type), associated injuries, and soft tissue conditions.

Collaborative Decision-Making Process

• Emphasis on informed consent where patients are educated about their options collaboratively with healthcare providers before proceeding with treatment plans.

MIPO Technique Overview

Description of MIPO Technique

• The MIPO technique involves small incisions allowing plate placement behind muscle layers without disturbing soft tissues—crucial for optimal healing conditions.

Advantages Over Traditional Methods

• This approach minimizes disruption to bone callus formation which is vital for successful fracture healing compared to more invasive techniques that may compromise this process.

Common Pitfalls in Osteosynthesis

Planning Failures Leading to Complications

• Poor planning can lead to osteosynthesis failures; improper screw placement or inadequate fixation can result in non-union or hardware failure.

Specific Case Example

• A specific case highlights how incorrect screw density can lead to material fatigue and subsequent failure if not properly managed during surgery.

Clavicle Fixation Strategies

Comparison Between Claws and Screws

• Discussion on preferences between using intramedullary nails versus screws; concerns raised about potential damage to surrounding structures like the rotator cuff when using larger drill bits commonly found in nail systems.

Articular Fractures Overview

Types of Articular Fractures

• Articular fractures classified into types based on displacement: Type I (non-displaced), Type II (displaced), Type III (comminuted), Type IV (complex associated with dislocation).

Fractura Tipo 2 y Manejo Inicial

Diagnóstico y Tratamiento Inicial

• Se observa una fractura tipo 2 de la cabeza del radio, se recomienda solicitar radiografías frontales y laterales del codo para evaluar mejor la situación.

• En caso de fracturas sin desplazamiento, se sugiere el uso de un cabestrillo por tres semanas y comenzar con movilización precoz; aunque esto no garantiza resultados óptimos, ya que un 5% puede desarrollar sedoartrosis.

Evaluación del Movimiento

• Un golpe o contusión puede resultar en pérdida de movilidad; es crucial evaluar el rango de movimiento antes de decidir el tratamiento.

• Si el rango de movimiento es adecuado, se puede aplicar anestesia local y proceder como en las fracturas tipo 1.

Abordaje Quirúrgico para Fracturas Tipo 2

Consideraciones Quirúrgicas

• Al abordar fracturas tipo 2, hay que tener cuidado con los ligamentos colaterales; se debe liberar la cápsula articular adecuadamente.

• La intervención puede requerir abrir la cápsula para acceder al plano óseo si hay compromiso significativo.

Riesgos Asociados

• Es importante tener precaución con el nervio radial durante la manipulación; una presión excesiva podría causar daño permanente.

Fracturas Tipo 3 y Complicaciones

Lesiones Asociadas

• Las fracturas tipo 3 suelen estar asociadas a lesiones ligamentarias en el codo. Se menciona un caso exitoso de reconstrucción por parte de una residente.

• Si no se logra la reconstrucción adecuada, se considerará una prótesis debido a la complejidad del caso.

Triada Terrible del Codo

• Se describe un paciente con triada terrible: fractura de cabeza radial, luxación y fractura del coronoides. Esto complica significativamente el tratamiento.

Clasificación y Estabilidad en Fracturas

Métodos de Clasificación

• Se discuten métodos para clasificar las fracturas según su estabilidad; es esencial entender estos criterios para determinar el tratamiento adecuado.

Técnicas Quirúrgicas

• Para las fracturas tipo 1, a menudo se opta por tratamiento conservador en pacientes mayores. Las tipo 2 requieren cirugía mientras que las tipo 3 necesitan fijación más rígida.

Principios Generales en Tratamiento

Reducción Anatómica y Movilidad Precoz

• Los principios fundamentales incluyen reducción anatómica, fijación estable y movilidad precoz como claves para una recuperación exitosa.

Anatomía Funcional del Antebrazo

Importancia Funcional

• El antebrazo permite pronosupinación gracias a sus seis articulaciones; su función integral requiere atención especial durante tratamientos quirúrgicos.

Fracturas Distales del Radio

Características Clínicas

• Las fracturas distales presentan deformidad característica conocida como "dorso de tenedor". Es vital reconocer esta presentación clínica para diagnóstico temprano.

Evaluación Radiológica

• Hay que tener cuidado con posibles parestesias relacionadas al nervio mediano tras una fractura desplazada.

Criterios de Inestabilidad

Definición e Implicaciones

• La inestabilidad se define por varios factores: comunición significativa, osteoporosis o desvío dorsal mayor a veinte grados. Estos criterios son esenciales para decidir sobre cirugía.

Uso de Tomografía

• La tomografía ayuda a visualizar mejor los tipos específicos de fractura y determinar su gravedad antes del tratamiento definitivo.

Fracture Treatment and Anatomy Restoration

Importance of Restoring Anatomy

• The radiobistal treatment focuses on restoring the anatomy to its original state, as it is crucial for joint function. Understanding normal anatomy is essential for accurate diagnosis and treatment.

• Systematic measurement of the entire radius fracture is necessary, including assessing soft tissue injuries and potential compartment syndrome. Proper imaging techniques like RAV-X plates and tomography are vital for diagnosis.

Assessing Fractures

• Determining if a fracture is displaced or unstable is critical; this includes using the FONTAIN criteria to guide appropriate treatment initiation and follow-up care.

• Articular fractures require anatomical reduction and stable fixation; without knowledge of anatomy, understanding these principles becomes challenging in trauma cases.

Complications and Follow-Up

• Displaced articular fractures greater than 2mm can lead to poor outcomes; immobilization should not exceed three weeks. Minimum X-ray views should include two incidences, with tomography being highly useful for assessment. Attention must be paid to complications, emphasizing the role of physical therapy in recovery.

Understanding Specific Fractures

Types of Fractures Discussed

• Clear distinctions were made regarding humeral fractures, particularly four-part fractures versus neck or diaphysis fractures; conservative management may be effective for certain angulations (up to 20 degrees).

• The MIPO (minimally invasive plate osteosynthesis) technique was highlighted as an effective approach for treating specific types of fractures in the elbow region that require open reduction and internal fixation due to their complexity.

Learning from Experience

• The session concluded with a reflection on previous classes where images of hand plates were discussed alongside distal radius surgeries, indicating a comprehensive learning approach throughout the course material covered so far. Suggestions were made for students to share experiences from their rotations related to upper limb injuries or fractures encountered during practice sessions.

Engagement and Questions

Student Interaction

• Students expressed gratitude towards the instructor after an extensive class filled with information; some shared their experiences regarding exposure to emergency situations involving fractures during their rotations but noted limited opportunities thus far. Discussions encouraged active participation in emergencies when possible for practical learning experiences.

Instructor Availability

• The instructor offered his contact information for any further questions or clarifications needed by students during their training period, reinforcing his commitment as both a teacher and colleague throughout their educational journey. He emphasized openness to communication beyond classroom hours as part of fostering student development in medical education contexts.