Musculoskeletal Trauma and Non-Traumatic Fractures Study Notes

Bone Structure: Bones shape the body and protect internal organs (e.g., ribs protect the heart and lungs).
Muscle Attachment: Bones serve as attachment points for muscles, aiding in movement through muscle contractions.
Storage: Bones store salts and minerals critical for various bodily functions.
Hematopoiesis: Bone marrow is the site of red blood cell production.

Skeletal Muscle (Voluntary Muscles):
- Most relevant to musculoskeletal injuries.
- Under conscious control, facilitates deliberate actions (e.g., walking, chewing).
- Major muscle mass of the body; generally attached to the skeleton.
Smooth Muscle (Involuntary Muscles):
- Located in organ walls; facilitates functions like digestion and blood circulation.
Cardiac Muscle:
- Found exclusively in the heart.

Contraction Ability: Muscle tissue can contract (shorten and thicken) when stimulated by nerve impulses.
Injury Potential:
- Overexertion can cause muscle fiber damage.
- Muscle injuries can result in swelling, tenderness, pain, and weakness.

Tendons: Connect muscle to bone.
Ligaments: Connect bone to bone.
Both tendons and ligaments can be bruised, crushed, or torn, contributing to musculoskeletal injuries.

Definition: Connective tissue at bone articulation points.
Properties: Strong, smooth, flexible, compressible, reduces friction during movement, acts as a shock absorber.
Injuries to Cartilage: Can lead to joint pain.

Structure of Skeleton:
- Must be strong for support, jointed for movement, and flexible for stress resistance.
Components:
- Skull, spinal column, thorax, pelvis, lower extremities, upper extremities.
Skeleton Division:
- Axial Skeleton: Head, thorax, vertebral column.
- Appendicular Skeleton: Bones of extremities (upper and lower, including shoulder and pelvic girdle).

Function of Joints: Create points of motion between bones.
Types of Movement:
- Flexion: Bending away from the body.
- Extension: Bending towards the body.
- Adduction: Moving towards the midline.
- Abduction: Moving away from the midline.
- Rotation: Turning along an axis.
- Circumduction: Circular movement from a central point.

Definition of Fracture: Break in the continuity of bone due to various injury mechanisms (direct, indirect, twisting forces).
- Open Fracture: Associated with an open wound (compound fracture); bone may protrude through skin.
- Closed Fracture: No break in the skin, fracture is beneath the skin.
Signs & Symptoms of Fractures:
- Pain, deformity, discoloration, paresthesia (numbness), anesthesia (loss of feeling), paresis (weakness), diminished distal pulse, and pale cool skin.
Fracture Complications:
- Hemorrhage, instability of the limb, tissue damage, infection (especially with open fractures), and compromised blood flow.

Definition: Degenerative condition associated with accelerated loss of bone minerals, particularly calcium, leading to weakened bones and increased fracture risk.
Risk Groups: Particularly common in geriatric patients.

Dislocation Definition: Displacement of a bone from its normal position in a joint, often leads to abnormal positioning, swelling, and tenderness.
Sprain Definition: Injury to a joint capsule with damage to ligaments, usually resulting in pain, swelling, and delayed discoloration.
Strain Definition: Injury to a muscle or tendon from overexertion or overstretching, usually leads to pain with muscle use but little swelling.

Definition: Can develop following injury as swelling increases around an injured area, leading to significant pain, reduced strength, paralysis, and potential loss of function or sensation.
Management: Immediate medical intervention is crucial to avoid limb loss.

Initial care should prioritize life-threatening injuries, then:
- Immobilize and splint the affected area.
- Elevate the limb and apply cold packs to manage pain and swelling.

Direct Force: Injury occurs at the point of impact (e.g., a knee hitting a dashboard).
Indirect Force: Injury occurs away from the impact point (e.g., falling and landing on outstretched hands).
Twisting Force: Common in sports injuries (e.g., a child stepping into a hole).

Pathological Fracture: Caused by minimal movement due to underlying conditions such as osteoporosis or cancer, may present without typical external signs.

Femur Fracture: Can result in significant internal bleeding (up to 1.5 liters per femur).
Pelvis Fracture: High blood supply area, can lead to severe bleeding (up to 2-3 liters).

Purpose of Splinting: Prevents movement of bone ends, reduces further injury risk, minimizes pain and complications associated with bone and joint injuries.
Goals of Splinting:
- Mobilize long bones and joints, immobilize both above and below the injury.
- Assess distal pulses, motor function, and sensation before and after splinting.
Improvising Splints:
- Can be made from various materials (cardboard, pillows, etc.) but should be firm, lightweight, and long enough to extend beyond joints.

Rigid Splints: Designed for specific limbs with secure fasteners.
Pressure Splints: Inflatable and used to secure the injury site.
Traction Splints: Primarily for femur fractures to relieve muscle tension and reduce blood loss.
Vacuum Splints: Contour to the injury and become rigid to hold the limb in place.
Kendrick Traction Splint: Used for mid-shaft femur fractures that are isolated and closed.

Situation: 24-year-old female struck by a car, presenting signs of severe pelvic and lower leg injury.
Immediate Care:
- Establish manual inline spine stabilization.
- Administer oxygen and rapidly transport.
Injury Assessment: Likely pelvic and lower leg fractures, significant risk for severe bleeding.
Management Steps: Quick stabilization of the pelvis, rapid transport without delay for splinting.

Mastery of musculoskeletal trauma assessment and care is critical for effective emergency response. This includes recognizing symptoms, understanding mechanisms of injury, and applying appropriate treatments.