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Chapter 66. Assessment of Musculoskeletal Function. Orthopedics. The branch of medicine that deals with the prevention and correction of the disorders and diseases of the musculo-skeletal system.
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Chapter 66 Assessment of Musculoskeletal Function
Orthopedics • The branch of medicine that deals with the prevention and correction of the disorders and diseases of the musculo-skeletal system. • The primary goal of the nurse caring for a client with locomotor disorders is the prevention of contractures (permanent shortening of a muscle) or deformities.
Skeletal Functions • To provide the body with a structural framework. • To act as a protective casing for internal organs ( the brain, heart, lungs, etc.). • To allow movement by muscles attached to the skeleton. • To store calcium, phosphorus, and magnesium. • To manufacture blood cells in the red bone marrow.
Structure • 206 Bones in the body • Long bones • Short bones • Flat bones • Irregular bones • Joints • Muscles
Bone Cells • Osteoblasts • Function in bone formation • Osteocytes • Mature bone cells that function in bone maintenance • Osteoclasts • Multinuclear cells function in destroying, resorbing, and remodeling bone
Bone Formation and Maintenance • Osteogenesis: process of bone formation • Ossification: the process of formation of the bone matrix and deposition of minerals • Bone is in constant state of turnover • Regulating factors • Stress and weight-bearing • Vitamin D • Parathyroid hormone and calcitonin • Blood supply • Role of calcium
Bone Healing • Hematoma and inflammation • Angiogenesis and cartilage formation • Cartilage calcification • Cartilage removal • Bone formation • Remodeling
Joints • A joint is a junction of two or more bones. • Three types: • Diarthosis: freely movable such as hinge (elbow, knee); ball and socket (hip, shoulder), pivot (skull, first vertebrae), gliding (wrist) and saddle (thumb). • Synarthosis: joints are immovable (skull sutures). • Amphiarthosis: slightly movable (vertebrae and pelvic bones).
Muscles • Attached to bones and other structures by tendons • Encased in a fibrous tissue—fascia • Contraction of muscle causes movement • Contraction utilizes energy in the form of ATP • Anaerobic pathways using glucose metabolized from stored glycogen provide energy for more strenuous muscle activity • Movement of the muscles may be voluntary or involuntary.
Assessment of the Musculoskeletal System • Include data related to function ability; ADLs and ability to perform various activities. Note any problems related to mobility. • Health history: family history, general health maintenance, nutrition, occupation, learning needs, socioeconomic factors, and medications—include OTC • Assessment of painand altered sensations • Physical assessment: posture, gait, bone integrity, joint function, muscle strength and size, skin, neurovascular status
Assessment of the Bony Skeleton • Notation on any deformities. • Body alignment. • Abnormal growths due to bone tumors. • Shortened extremities, symetry. • Amputations. • Abnormal angulation other than at joints. • Crepitus (a grating or crackling sensation or sound). • posture
Assessment of Spine Three common spinal curvatures: • Scoliosis (crooked back; lateral curving deviation). • Kyphosis (hump back; increased roundness of the thoracic spinal curve). • Lordosis (sway back; exaggeration of the lumbar spine curvature as seen in pregnancy).
Range of Motion (ROM) • Active • person does the moving • Have person move joint through each of its various ROM movements • Note the angle of each joint movement • Note any pain, tenderness, or crepitus
Range of Motion (ROM) • Passive • person relaxes and allows you to move the joints • Done if person is unable to do active ROM • ALWAYS stop if the person complains of pain • NEVER push a joint beyond its anatomic angle
Muscle Strength • As you are testing ROM • Test muscle strength • Ability to perform the ROM against resistance • Symmetry • Involuntary movements
Rheumatoid Arthritis—Ulnar Deviation and “Swan-Neck” Deformity
Diagnostic Evaluation • X-rays • Computed tomography • MRI • Arthrography • Bone densitometry • Bone scan • Arthroscopy • Arthrocentesis • Electromyography • Biopsy • Laboratory studies