Kin 191 B – Injury Evaluation Process, Nomenclature, Joint Anatomy, Kinematics
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Transcript of Kin 191 B – Injury Evaluation Process, Nomenclature, Joint Anatomy, Kinematics
KIN 191B – Advanced Assessment of Upper Extremity Injuries
Injury Evaluation Process, Injury Nomenclature, Joint Anatomy and
Kinematics
Injury Evaluation
Clinical Evaluations• Generally occur in controlled environment with
access to evaluation tools, records, references (text and personnel) and time
• HIPS/HOPS process– History– Inspection/Observation– Palpation– Special Tests (ROM, stress tests (ligament/capsule),
neurovascular)
History• Etiology/MOI
• Unusual sounds/sensations
• Location of symptoms
• Onset/duration of symptoms
• Description of symptoms
• Prior history
• General health
Inspection• Gait, posture, movement patterns
• Gross deformity
• Swelling
• Discoloration
• Scars
• Skin/infection
Palpation• Sequencing
• Point tenderness
• Muscle spasm/trigger points
• Change in tissue density
• Crepitus
• Symmetry
• Tissue temperature
Range of Motion• Active range of motion
• Passive range of motion– End feels: pathologic vs. physiologic
• Resisted range of motion– Strength test vs. manual muscle exam (MME)
• Cardinal planes– Frontal, transverse/coronal, sagittal
Ligament/CapsularStress Tests
Special (“named”) tests
Neurological Tests
• Sensory function– Nerve root levels (dermatomes)– Peripheral nerves
• Motor function– Nerve root levels (myotomes)– Peripheral nerves
• Reflex testing
Vascular Evaluation
• Pulse points
• Capillary refill (distal extremities)
• Skin color
• Skin temperature
Field Evaluations
• Primary survey– ABCD’s– Activation of EMS/emergency plan
• Secondary survey– Abbreviated HIPS/HOPS process– Removal from field considerations
Injury Nomenclature
Tissue Differentiation
• Soft tissue injuries
• Bony injuries
• Neurovascular injuries
Soft Tissue Injuries
• Musculotendinous injuries
• Joint structure injuries
• Articular cartilage injuries
Musculotendinous Injuries
• Strains
• Tendonopathies
• Myositis ossificans
• Bursitis
Musculotendinous Injuries
• Strains– Caused by tensile forces (stretch beyond capacity) or
generation of more force than can be tolerated (eccentric)– 1st degree: microtrauma– 2nd degree: partial tearing– 3rd degree: complete tearing, loss of function
• Inability to generate force, typically has palpable or visible defect
Musculotendinous Injuries
• Tendonopathies (tendonitis, tenosynovitis)– Inflammatory condition, repetitive microtrauma– 1st degree: pain/slight dysfucntion during activity– 2nd degree: decreased function, pain after activity– 3rd degree: constant pain prohibiting activity– If prolonged, contributes to weakness of tendon– AROM limited at end range by pain, PROM limited when
stretched, RROM abnormal due to pain
Musculotendinous Injuries• Myositis ossificans– Formation of bone within muscle tissue – bodily error
during healing process– Typically associated with trauma to large muscles– Can see on x-ray (3 weeks), affects ROM and strength
• Bursitis– Irritation of fluid filled sacs, generally from friction or
trauma– Can enlarge to point of affecting ROM
Joint Structure Injuries
• Sprains
• Subluxation
• Dislocation
• Synovitis
Joint Structure Injuries• Sprains– Stretching/tearing of ligament/joint capsule– 1st degree: microtrauma, firm end point– 2nd degree: partial tearing, soft end point– 3rd degree: complete tearing, empty end point and loss of
function
• Subluxation– Partial/complete disassociation of joint structure which
may spontaneously reduce– Each episode increases likelihood of recurrence
Joint Structure Injuries• Dislocation– Complete disassociation of joint surfaces from rupture of
soft tissue restraints– Obvious deformity, may be open or closed– May be emergent conditions if neurovascular status is
compromised– Must evaluate with x-ray before reduction
• Synovitis– Inflammation of synovial membrane and/or joint capsule
Articular Surface Injuries• Osteochondral defects
– Fracture/softening of articular cartilage– Severity based upon depth of defect– Location plays key role (weight bearing)
• Osteochondritis dissecans (“joint mice”)– Dislodged fragments of bone in joint space– May present with locking/decreased ROM
• Arthritis– Osteoarthritis = degeneration of joint’s articular surface– Can lead to cartilage degeneration and exposure of bone
Bony Injuries
• Exostosis
• Apophysitis
• Fractures
• Stress fractures
Bony Injuries
• Exostosis– Growth of extraneous bone from body’s response to
Wolff’s law– May form mechanical block to normal ROM
• Apophysitis– “Growing pains”– Inflammatory condition involving growth plates especially
relative to attachment site of large/strong muscle/muscle group
Bony Injuries
• Fractures– Interruption in normal integrity of bony surface– Can occur in diaphysis, epiphysis, articular cartilage– Types: depressed, transverse, comminuted,
compacted, spiral, longitudinal, greenstick, avulsion
• Stress fractures– Chronic condition from repetitive stress/microtrauma– Attention to changes in workload, surfaces, footwear
Neurovascular Pathologies• Often associated with joint dislocation, bony
displacement or concussive forces
• Peripheral nerve injuries– Entrapment – mechanical, swelling– Stretch - traction
• Vascular injuries– Compression– Shear
Imaging Techniques
• Radiographs (plain film x-ray)– Best for bone injuries, joint surfaces/spaces
• Computerized tomography (CT scan)– Best for bony/articular cartilage injuries
• Magnetic resonance imaging (MRI)– Best for soft tissue injuries (ligaments, menisci)
Imaging Techniques
• Bone scan– Best for acute bony changes (stress fx), injection
• Ultrasonic imaging– Best for tendon/soft tissue imaging
Joint Anatomy
Joint Classifications
• Synarthrotic = immovable
• Amphiarthrotic = slightly moveable
• Diarthrotic = freely moveable– Synovial joints
Synovial Joints
• Characteristics of all synovial joints
• Types of synovial joints
Characteristics of Synovial Joints
• All synovial joints have the following characteristics– Joint capsule and/or ligaments– Joint capsule lined with synovial fluid– Opposing bone surfaces contain hyaline (articular)
cartilage– A joint space exists containing small amount of
synovial fluid
Characteristics of Synovial Joints
• Joint capsule/ligaments– Collagenous bundles that maintain joint position– Portions become slack/taut at different joint positions– Ligaments are intrinsic (thickenings of joint capsule) or
extrinsic (separate structures)– Ligaments strongest in middle, weakest at ends
• Joint capsule lined with synovial fluid– Secretes and absorbs synovial fluid
Characteristics of Synovial Joints
• Opposing bone surfaces contain hyaline cartilage– Cushions bone ends, can help provide static and/or
dynamic stability via shape– When healthy, has smooth, pearly appearance– Nourished by synovial fluid
• Joint space containing synovial fluid– Acts as natural lubricant and delivers nutrition to articular
cartilage
Types of Synovial Joints• Ball and socket
– Allow all possible movements– Hip, shoulder (GH)
• Hinge– Allow only flexion/extension– Elbow, ankle
• Pivot– Permit rotation about an axis– Atlantoaxial joint, proximal radioulnar joint
Types of Synovial Joints• Ellipsoidal
– Elliptical convex head in elliptical concave socket– Wrist (between proximal/distal carpal rows)
• Saddle– Reciprocally concavo-convex– Carpometacarpal joint of the thumb
• Gliding– Allow small back/forth, sideways movements– Intercarpal/intertarsal joints, intervertebral joints
Joint Kinematics
Joint Kinematics• Kinetics vs. Kinematics
– Kinetics is description of forces producing motion in the body• Dynamic muscular activity
– Kinematics is description of motions of the body• Pattern of joint movement
• Osteokinematics– Movement of joints in relation to one another– Primary movements
• Arthrokinematics– Movement of joint surfaces in relation to one another– Accessory movements