welcome to week 5!! midterm chapter 15 orthopaedics
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Welcome to week 5!! Midterm Chapter 15 Orthopaedics. Error review from OB GYN. Osteology: The study of bones Orthopaedics: The science of diagnosis and treatment of musculoskeletal diseases and disorders Etymology: Ortho : straight Pais : child - PowerPoint PPT PresentationTRANSCRIPT
Copyright © 2009 Wolters Kluwer Health | Lippincott Williams & Wilkins
Welcome to week 5!!Midterm
Chapter 15
Orthopaedics
Welcome to week 5!!Midterm
Chapter 15
Orthopaedics
Copyright © 2009 Wolters Kluwer Health | Lippincott Williams & Wilkins
Error review from OB GYNError review from OB GYN
Copyright © 2009 Wolters Kluwer Health | Lippincott Williams & Wilkins
• Osteology: The study of bones
• Orthopaedics: The science of diagnosis and treatment of musculoskeletal diseases and disorders
– Etymology:
• Ortho: straight
• Pais: child
• Orthopaedist: A physician who treats the special problems associated with the musculoskeletal system
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• Bone
– One of the hardest tissues in the body
– Provides support for the body
– Storage site for calcium
– Site for formation of blood cells (hematopoiesis)
• Types of Bone Tissue:
– Compact bone: tightly packed, on surfaces of bones
– Spongy: less dense, thin, bony plates
• Remodeling: continual growth and replacement of bone
Anatomy of the Musculoskeletal System Anatomy of the Musculoskeletal System
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• Types of Bones
– Long Bones
• Diaphysis (tubular shaft)
• Epiphysis (expanded end)
• Metaphysis (where diaphysis meets epiphysis)
• Medullary cavity: where bone marrow is produced
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• Red marrow: marrow that actively produces blood cells
• Yellow marrow: produces fat cells
• Types of Bones
– Short bones: shorter, allow for flexibility
– Flat bones: thin, plate-like structures for protection (skull)
– Irregular bones: variety of sizes and shapes (vertebrae)
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Divisions of the Skeleton Divisions of the Skeleton
• Axial: bones of the skull, vertebral column, and chest
• Appendicular: bones of the limbs as well as the shoulder and pelvic girdles
– Pectoral girdle: attaches arms to the axial skeleton
– Pelvic girdle: attaches base of spine to hips and legs
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• Joints
– Joint (articulation): point of connection between two or more bones, or between cartilage and bone
– Classified by range of movement:
• Fibrous: do not move (sutures of the skull)
• Cartilaginous: some movement (vertebrae of the spine)
• Synovial: full movement (most joints of the body). Contain synovial fluid to help joints move easily
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• Cartilage
• Menisci: between the two joints formed by the femur and the tibia
– Lateral meniscus (outer side)
– Medial meniscus (inner side)
• Ligaments
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• Muscle: enables movement of bones and joints
– Voluntary: controlled by cerebral motor cortex and cerebellum
– Involuntary: controlled by brain stem and spinal cord
• Muscles move by pulling and relaxing
− Flexor muscles: bend a limb at the joint
− Extensor muscles: extend or straighten the limb at the joint
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• Types of Muscle:
– Skeletal: attached to bones at both ends by tendons
• Named by their characteristics:
– Number of origins and insertions
– Location of origin
– Shape
– Direction of muscle fibers
– Size
– Action or movement generated
• Involuntary muscles: movements cannot be controlled consciously
• Cardiac muscle: found only in the heart
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• Tendons: attach each end of a muscle to bone and allow muscles to pull on bones
• Bursas: protect bones and tendons from injury or from rubbing against each other
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• Anatomic regions of the body: considers the organization of the body as segments
• Anatomic terms of movement: describe the movement and direction of body parts at the joints
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• Sprains: a stretch or tear of a ligament
• Strain: a stretch or tear of a muscle or tendon
– Treatments: reduce pain, immobilize injured ligament
• RICE: rest, ice, compression, and elevation
• NSAIDs reduce pain and inflammation
Common Musculoskeletal Diseases and Treatments Common Musculoskeletal Diseases and Treatments
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• Fracture: a break or crack in the bone
– Types: according to appearance and characteristics
– Treatments: realign broken bones, then immobilize to heal
• Open reduction: makes incision in the skin over fracture site
• Closed reduction: does not make an incision in the skin
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• Fixation: immobilizing parts of fractured bone
– ORIF: open reduction and internal fixation
– Internal fixation: placement of instruments underneath the skin
– External fixation: instruments connected to a metal bar outside the skin
Immobilizing fracture: use of cast, brace, or splint
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• Dislocation: displacement of a joint from its normal position
• Subluxation: an incomplete or partial dislocation
– Treatment: Reducing dislocation back into position and tightening ligaments around it
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• Scoliosis: abnormal lateral curvature of the spine; unknown cause
– Treatment: surveillance of curvature over time
– Surgery: fusing and pinning of bones to help keep the spine straight
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• Avascular necrosis: the death of bone tissue due to a permanent loss of blood supply; also called osteonecrosis
– Treatments:
• NSAIDs to reduce pain and inflammation
• Core decompression
• Osteotomy
• Bone grafting
• Total joint replacement
• Total knee arthroplasty (TKA)
• Total hip arthroplasty (THA)
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• Osteoporosis: bones become weak and brittle; unknown cause
• Dowager hump: forward curvature of spine from compression fractures
– Treatments:
• Hormonal drugs (estrogen)
• Selective estrogen receptor modulators (SERMs).
• Bisphosphonates
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• Meniscal tears: injury to the menisci on either side of the knee joint
– Three zones:
• Anterior horn: front third
• Posterior horn: back third
• Body: middle third
– Treatment:
• Arthroscopy: endoscopic repair of the joint
• Meniscectomy: surgical removal of the tear
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• Osteoarthritis: degenerative joint disease (DJD), a chronic disorder of joint cartilage and surrounding tissues
– Treatments:
• NSAIDs relieve pain and reduce inflammation.
• Cyclooxygenase-2 (COX-2) inhibitors to relieve pain and swelling of joints.
– Surgical treatments:
• Arthroplasty
• Arthrodesis: surgical fusion of bones to help relieve pain
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• Muscular Dystrophy (MD): muscle wasting and weakness
– Duchenne muscular dystrophy (DMD): more aggressive, onset at early age
– Becker muscular dystrophy (BMD): milder, onset in teens or early adulthood
– Myotonic muscular dystrophy: most common adult form
• Treatment: No cure, purely supportive
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• Bone Tumors– abnormal growth of cells in bones.
– Benign—do not spread to other tissues
• Osteochondroma most common – bony spur on surface of the bone
• Pedunculated – stalk is present
• Sessile – broad base of attachment
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– Malignant – can spread to other tissues
• Osteosarcoma – bone-forming cells
• Ewing sarcoma – primarily in children
• Chondrosarcoma – develops in cartilages around bones
• Multiple myeloma – tumor of plasma cells of bone marrow
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• Muscle and Flexibility Tests
• Laboratory Tests
– Complete blood count (CBC)
– Erythrocyte sedimentation rate (ESR) and cAMP receptor protein (CRP).
– Salicylate level
– Creatine kinase (CPK) and aldolase
– Liver function tests
• Cultures: identify organisms that cause infection.
Diagnostic Studies and Procedures Diagnostic Studies and Procedures
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• Biopsy:
– Bone marrow aspiration and biopsy
• Bone marrow aspiration: liquid sample of bone marrow is removed.
• Core biopsy: a small solid piece of bone marrow is obtained
• Doppler ultrasound: used to detect blockages in blood vessels
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• Imaging Studies
– Radiography: x-ray, most common diagnostic tool
– Bone densitometry: also called dual-energy x-ray absorptiometry (DEXA)
– Bone scan: also called radionuclide study
– Computerized tomography (CT) scan
– Myelogram: an x-ray exam of the spinal cord and space around it (subarachnoid space)
• CT myelogram: the use of a CT scan immediatelyafter myelogram
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– Magnetic resonance imaging (MRI)
– Lumbar discography: discogram.
– Electromyography (EMG)
– Nerve conduction studies
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The end-questions???????The end-questions???????