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このデッキ内のフラッシュカード (64 枚)

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  • What is the leading cause of death for ages 1–44 and how does trauma rank among causes of death across all age groups?

    • Trauma is the leading cause of death for ages 1–44
    • Trauma is surpassed only by cancer and atherosclerosis as a major cause of death in all age groups
    epidemiology trauma

  • What are the management options listed for infection?

    • Supportive care
    • Antimicrobials
    • Surgery
    infection treatment

  • What is the annual number of injuries in the U.S. and how many require medical care and hospitalisation?

    • \(60\ \text{million}\) injuries/year
    • \(30\ \text{million}\) require medical care (\(50\%\))
    • \(3.6\ \text{million}\) require hospitalisation (\(12\%\) of those needing medical care)
    epidemiology trauma

  • How many injuries cause work-limiting disability and what are the temporary vs permanent counts and annual trauma-related costs?

    • \(9\ \text{million}\) disabling (≥24 hr off work)
    • \(300{,}000\) permanently disabling
    • \(8.7\ \text{million}\) temporarily disabling
    • \(400\ \text{billion}/\text{year}\) trauma-related costs
    disability costs

  • Can a broken bone be the direct cause of a patient's death?

    No — 'No patient ever died of a broken bone.'

    trauma orthopaedics

  • What must be addressed before orthopaedic care in trauma patients?

    • Patient survival

    Also summarized as: Life, limb, wound, fracture

    trauma priorities

  • What is the primary treatment goal in the ATLS/TEAM trauma approach?

    • Treat the greatest threat to life
    atls trauma

  • Name two key evaluation principles of initial trauma management in ATLS/TEAM.

    • ABCDE
    • Detailed history was not essential to begin evaluation and treatment
    evaluation management

  • What is a fracture?

    • Fracture: discontinuity of bone.
    orthopedics definition

  • What are key classification categories and common descriptors for fractures?

    • Categories: pathologic or traumatic, stress, location in bone, mechanism of injury, status of soft tissue
    • Common descriptors: simple/compound, displaced/non-displaced, open/closed, complete/incomplete
    orthopedics classification

  • What is the definition of a pathologic fracture?

    A bone broken through an area weakened by pre existing disease, caused by stress that would not break a normal bone.

    fracture pathologic

  • Name common underlying causes of pathologic fractures.

    • Osteoporosis
    • Metabolic disease
    • Infection
    • Malignancy
    causes pathologic

  • What are two possible causes of multiple vertebral fractures in a 70‑year‑old with kyphosis and chronic back pain?
    spine with multiple vertebral fractures

    • Osteoporosis or osteomalacia
    • Systemic disease with multiple vertebral metastases
    fractures spine

  • Name the three radiographic types of bone metastases and give one primary cancer mentioned that commonly produces sclerotic (hyperdense) metastases.
    radiograph showing hip and prosthesis

    • Osteoblastic
    • Osteolytic
    • Mixed

    Primary cancer commonly causing sclerotic (hyperdense) metastases: Prostate cancer

    metastasis oncology

  • What differential diagnoses are listed for an osteolytic lesion?

    • Metastasis
    • Infection
    • Benign lesion
    • Malignant lesion
    bone lesion

  • Based on the notes, what is the most likely nature of the described osteolytic lesion?

    • Most likely malignant

    X-ray of hip showing an osteolytic lesion

    diagnosis malignancy

  • What defines a stress fracture and how does it develop?

    • Stress fracture: bone injury from repetitive minor traumas without major single trauma
    • Develops when bone fatigues under repeated loading and a crack forms, potentially progressing to a complete fracture
    orthopedics stress

  • Which groups are commonly affected by stress fractures and what factor contributes to their occurrence?

    • Common groups: military recruits, ballet dancers, athletes
    • Contributing factor: muscle fatigue leading to abnormal stress concentration
    epidemiology fracture

  • What is an insufficiency fracture and what predisposes bone to it?

    • Insufficiency fracture: occurs with normal load but impaired bone repair
    • Predisposing factors noted: malnourishment and inability to repair bone
    insufficiency fracture

  • What type of fracture is shown in the radiograph?

    • Stress fracture

    X-ray showing a stress fracture in the foot

    fracture stress

  • In which body part is the fracture located?

    • Foot

    X-ray showing a stress fracture in the foot

    anatomy foot

  • What condition is suggested by the X-ray image of the feet?

    X-ray feet

    Potential stress fracture

    radiology fracture

  • Which single-letter marker is visible on the X-ray image?

    X-ray feet marker

    R

    imaging label

  • Name the five main types of mechanical loading that act on bone.

    • Compression
    • Tension
    • Shear
    • Torsion
    • Bending
    bone biomechanics

  • How many main mechanical loading types are listed for bone?

    • Five

    Diagram illustrating different types of mechanical loading on bone: Compression, Tension, Shear, Torsion, Bending

    bone overview

  • Name two fracture shapes shown in the images.

    • Simple
    • Multi-fragment (comminuted)

    Simple fracture X-ray

    fractures classification

  • What is another term for a 'multi-fragment' fracture?

    • Comminuted fracture

    Comminuted fracture X-ray

    fractures terminology

  • What is the characteristic cross-sectional shape and diameter relationship of a transverse bone fracture?

    A transverse fracture has a circular cross-sectional surface and the fracture diameter equals the bone diameter.

    transverse fracture image

    fracture transverse orthopedics

  • What is the defining geometric characteristic of a spiral fracture?

    A spiral fracture extends in more than one plane (i.e., the fracture line spirals around the bone).

    spiral fracture image

    fracture spiral orthopedics

  • Which anatomical locations are listed for classification by anatomical location?

    • Epiphysis
    • Metaphysis
    • Diaphysis
    • Capsule
    • Articular surface
    • Growth plate
    anatomy classification

  • Which structure listed corresponds to the bone's growth region?

    • Growth plate
    growth anatomy

  • What does the provided microscopic image depict?

    Microscopic view of bone tissue showing vascularization

    • Bone tissue showing vascularization
    bone histology

  • What key histological feature is highlighted in the microscopic view of bone?

    • Vascularization within bone tissue

    Microscopic view of bone tissue showing vascularization

    bone vascularization

  • What is a common reduction challenge with epiphyseal injuries?

    Difficult reduction

    orthopedics epiphysis

  • Name three features associated with epiphyseal injuries.

    • Intracapsular
    • Intraarticular
    • Joint stiffness
    orthopedics epiphysis

  • Refer to the pelvic X-ray: which pelvic bones are labeled near the hip joint?

    • ischium
    • pubis
    • ileum
    • avetabulum

    Pelvis X-ray showing labeled pelvic bones and femoral neck fracture

    anatomy pelvis

  • What characteristic limb rotation is shown with the fracture of the femoral neck on the image?

    • External rotation
    orthopedics fracture

  • What clinical sign does the term 'deformity' indicate in the provided image of legs and feet?

    deformity photo

    • Shortening
    orthopedics deformity

  • Differentiate 'dislocation' and 'displacement' in musculoskeletal injury terms.

    • Dislocation: joint
    • Displacement: fracture
    orthopedics fracture

  • What emergency-care maxim about fracture handling is described as 'highly touted and least frequently obeyed'?

    The maxim: 'splint them where they lie'.

    knee fracture X-ray

    fracture emergency

  • Why did crews often skip applying splints during transport after injury in the cited observation?

    Because journeys were usually short and crews felt the time spent applying splints was not justifiable.

    ankle injuries X-rays

    prehospital management

  • What are the primary emergency aims in initial fracture management?

    • Prevent further soft tissue damage
    • Provide pain relief
    • Decrease incidence of clinical fat emboli and shock
    • Facilitate patient transport and radiographic studies
    emergency fractures

  • What are the '3 As' used in emergency fracture care?

    • Analgesia
    • Antibiotics
    • Antitetanus toxoid

    X-ray of knee fracture

    management fractures

  • What danger does the text associate with mechanically efficient modern treatment methods?

    The craftsman may forget that bone union cannot be imposed but must be encouraged.

    treatment philosophy

  • What care does the text say is often required when a bone's vascular connections are damaged?

    Patient care and understanding like that of a gardener, rather than the mechanical technique of a cabinet maker.

    healing vascular

  • In fracture assessment, which takes priority: soft tissue or bones?

    Soft tissue takes priority over bones.

    fracture softtissue assessment

  • Name the main 'personalities' to consider in fracture management.

    • Personality of fracture: Site (metaphysis, ...)
    • Personality of soft tissue: Closed
    • Personality of the patient
    • Personality of the doctor and hospital

    X-ray image of a leg fracture

    fracture assessment management

  • What is the emergency management principle for dislocations and how are reductions classified?

    • Any dislocation requires reduction as an emergency.
    • Reductions are closed or open.
    • Reductions can be anatomical or functional.
    treatment dislocation

  • What immobilization methods aim for absolute stability in fracture management and what follows immobilization?

    • Goal: absolute stability.
    • Methods: traction, cast, external fixation, internal fixation.
    • Next step: rehabilitation.

    knee fracture X-ray

    immobilization fixation

  • What are the four AO principles of fracture management?

    • Fracture reduction and fixation to restore anatomical relationships
    • Fracture fixation stability: absolute or relative as required by the fracture, patient, and injury
    • Preservation of blood supply to soft tissues and bone by gentle reduction and careful handling
    • Early and safe mobilization and rehabilitation of the injured part and patient

    AO principles diagram

    fracture ao management

  • What does the AO principle 'preservation of the blood supply' require?

    • Gentle reduction techniques and careful handling to preserve blood supply to soft tissues and bone
    fracture vascular ao

  • What was the title of Apley and Rowly's 1992 JBJS editorial?

    • Fixation is Fun.
    orthopedics history

  • What skill did Apley and Rowly say surgeons who treat fractures should have?

    • Be equally adept in both methods of fracture treatment.
    orthopedics principles

  • What is the typical stitch removal interval for facial wounds?

    • 3–5 days
    stitches wounds

  • When are stitches usually removed for an upper limb injury in a child?

    • 3 weeks
    stitches pediatrics

  • Name four bone healing abnormalities (complications).

    • Delayed union
    • Nonunion
    • Malunion
    • AVN
    complications fractures

  • Provide examples of bone healing abnormalities and view an illustrative x-ray.

    • Delayed union
    • Nonunion
    • Malunion
    • AVN

    X-ray of tibia/ankle fractures and hardware

    complications imaging

  • What are the major categories of complications that can follow a bone fracture?

    • Infection
    • Soft tissue injuries: arterial injury, nerve injury, compartment syndrome
    • Pulmonary complications: PE, FE, ARDS
    • Bleeding disorders
    • Other complications: CRPS (RSD), MO, OA

    ankle X-ray with hardware

    complications fractures

  • Give three pulmonary complications that may occur after a fracture.

    • Pulmonary embolism (PE)
    • Fat embolism (FE)
    • Acute respiratory distress syndrome (ARDS)
    pulmonary complications

  • What are the primary emergency priorities listed for injuries?

    • Life
    • Limb
    • Wound
    • Fracture
    fracture priorities

  • What complication is associated with an open fracture?

    • Infection

    wound photograph

    fractures complication open

  • What complication is associated with a growth plate (physeal) fracture?

    • Deformity

    elbow x-ray

    fractures complication growthplate

  • What are the three fundamental components of fracture management listed in the summary?

    • Reduction
    • Immobilization
    • Rehabilitation
    fracture management

  • Name the three stages of care for a fractured bone given in the summary.

    • Reduction
    • Immobilization
    • Rehabilitation
    fracture care
学習ノート

Principles of Fractures — Study Notes

Overview

  • Fracture: a break in the structural continuity of bone; always considered within the context of associated soft tissue injury.
  • Key priorities: life, limb, wound, fracture — life-saving measures come before orthopaedic care.

Epidemiology & context

  • Trauma is a leading cause of death in the first four decades of life and a major cause across age groups.
  • High injury burden: many injuries require medical care and substantial socioeconomic costs.

Initial priorities in trauma

  • Follow ATLS principles: treat the greatest threat to life first; use the ABCDE approach (Airway, Breathing, Circulation, Disability, Exposure).
  • Remember the trimodal distribution of trauma death: immediate, early, and late peaks; early management reduces preventable deaths.
  • Practical emergency aims: prevent further soft-tissue damage, relieve pain, reduce fat embolism/shock risk, facilitate transport and imaging, and give analgesia, antibiotics, and tetanus prophylaxis when indicated.

Definitions & related terms

  • Wound: discontinuity of skin.
  • Ulcer: loss of epithelial surface.
  • Fistula: abnormal tract between epithelialized surfaces.
  • Fracture: discontinuity of bone.

Classification of fractures (practical points)

  • By cause: traumatic versus pathologic (bone weakened by disease).
  • By completeness: complete versus incomplete.
  • By skin/soft tissue: closed (simple) versus open (compound); open fractures have higher infection risk.
  • By pattern/shape: transverse, oblique, spiral, comminuted (multi-fragment), simple.
  • By anatomical location: epiphysis (intra-articular), metaphysis, diaphysis, growth plate (physis).

Pathologic fractures

  • Occur where bone is weakened by pre-existing disease (osteoporosis, infection, primary bone tumor, metastasis, metabolic bone disease).
  • Suspect when fracture results from minimal trauma.
  • Important to identify underlying cause for management and prognosis.

Spine with multiple vertebral fractures

Alt text: Spine lateral view with multiple vertebral fractures

Stress and insufficiency fractures

  • Result from repetitive loading (fatigue fractures) or normal load on weakened bone (insufficiency fractures).
  • Common in military recruits, athletes, dancers; insufficiency fractures occur in osteoporotic or poorly nourished patients.
  • Muscle fatigue can increase stress on bone and precipitate cracks.

Stress fracture of foot

Alt text: X-ray showing a stress fracture in the foot

Mechanical loading of bone

  • Principal loading types: compression, tension, shear, torsion, bending; fracture pattern depends on the dominant load.

Mechanical loading diagram

Alt text: Diagram of compression, tension, shear, torsion, bending

Fracture shapes — clinical relevance

  • Transverse: fracture line perpendicular to long axis; often from bending force.
  • Oblique: diagonal line; can be unstable due to shear.
  • Spiral: helical around shaft; usually due to torsion.
  • Comminuted: multiple fragments; often high-energy and unstable.

Simple fracture image

Alt text: Simple fracture X-ray

Epiphyseal and intra-articular fractures

  • Epiphyseal (growth plate) fractures risk growth disturbance and deformity in children.
  • Intra-articular fractures risk joint stiffness and post-traumatic osteoarthritis; precise reduction of articular surface is important.

Femoral neck fracture pelvis X-ray

Alt text: Pelvis X-ray showing femoral neck fracture

Clinical signs and immediate management

  • Common signs: deformity, shortening, abnormal mobility, pain, swelling, skin breaks (open fracture).
  • Emergency management goals: immobilize in position found ("splint them where they lie"), prevent further soft-tissue injury, provide analgesia, control bleeding, and prepare for definitive care.
  • Splinting reduces pain, prevents displacement, lowers risk of fat embolism, and facilitates safe transport and imaging.

Treatment principles (the "personality" approach)

  • Treat each fracture based on the personality of the fracture, the soft-tissue injury, the patient, and available resources.
  • Three pillars of fracture care:
  • Reduction — restore alignment (closed or open; anatomical vs functional reduction).
  • Immobilization / fixation — methods include cast, traction, external fixation, and internal fixation depending on stability needs.
  • Rehabilitation — early, safe mobilization of joint and patient to restore function.

AO principles of fracture management

  • Four core principles: (1) anatomic reduction, (2) stable fixation (absolute or relative stability as required), (3) preservation of blood supply by gentle handling, (4) early mobilization and rehabilitation.

AO principles diagram

Alt text: AO principles of fracture management diagram

Internal fixation

  • Internal fixation restores alignment and stability to allow early motion, but requires attention to soft-tissue preservation and biology of healing.
  • Surgeons should be skilled with both closed and open techniques and tailor fixation to the fracture "personality."

Healing timeline (practical points)

  • Healing speed varies by age, bone, and patient factors (smoking, nutrition, systemic disease).
  • General pattern: children heal faster than adults; lower limb fractures typically take longer than upper limb fractures; smoking and pathology delay healing.
  • Wound/stitch care: superficial sutures often removed in days to weeks depending on site.

Complications to anticipate

  • Bone healing problems: delayed union, nonunion, malunion, avascular necrosis (AVN).
  • Soft tissue complications: infection (especially in open fractures), arterial or nerve injury, compartment syndrome.
  • Systemic/pulmonary: fat embolism, pulmonary embolism, ARDS.
  • Other: complex regional pain syndrome (CRPS), heterotopic ossification, post-traumatic osteoarthritis.

Practical summary

  • Always prioritize life over limb; follow ATLS and immobilize fractures early.
  • Identify fracture type (open vs closed, location, pattern) and associated soft-tissue injury.
  • Choose reduction and fixation method based on fracture pattern, soft tissues, and patient factors; preserve vascularity and mobilize early when safe.

Quick reference: when to worry

  • Open fracture: high infection risk — urgent debridement and antibiotics.
  • Suspected compartment syndrome: urgent fasciotomy if clinical criteria met.
  • Pathologic fracture: investigate for underlying disease (malignancy, metabolic bone disease).