Case Study B. Skeletal System-Look Out Below: A Case Study on Bone Tissue Struct
ID: 3507763 • Letter: C
Question
Case Study B. Skeletal System-Look Out Below: A Case Study on Bone Tissue Structure and Repair Mrs. Debbie Morgan is a 45-year-old female who works as a stocking clerk for a local home improvement store. While she was at work today a large box of metal rivets fell from a 20-ft-high overhead shelf, striking her outstretched arm and knocking her to the ground. The ambulance personnel reported that she had lost quite a bit of blood at the accident scene and was "knocked out" when they arrived. To minimize further hemorrhage, the paramedics applied a pressure bandage to her arm You meet the paramedics as they bring Mrs. Morgan into the emergency room and begin to assess her for injuries. She is awake and alert, but complaining of severe left arm and back pain, plus she has a "killer headache." To fully examine her injuries you remove four blood-soaked bandages from her arm. You notice a large open wound on her arm with what appears to be bone tissue sticking out of the skin. She also has bruises covering her left shoulder, left wrist, and lower back. To determine the extent of her injuries Mrs. Morgan undergoes several x-rays, which reveal the following: 1) fracture of the left humerus at the proximal diaphysis, 2) depressed fracture of the occipital bone, 3) fracture of the 3rd lumbar vertebral bodyExplanation / Answer
1) definition:
Hemorrhage- it is defined as an escape of blood from a ruptured blood vessel
Fracture- it is defined as a break in the continuity of bone.
Proximal- anything situated nearer to the center of the body
Diaphysis- it is the shaft or central part of a long bone
2) fracture of left humerus at proximal diaphysis comes under CLASSIFICATION OF FRACTION BY LOCATION
Depression fracture comes under the classification by type.
3) The cavity of the vertebral body consists of cancellous bone tissue and is encircled by a protective layer of compact bone. Cancellous bone is made up of spongy, porous, bone tissue that is filled with red bone marrow. it is important for producing blood cells.
4) The diaphysis is made up of cortical bone and usually contains bone marrow and adipose tissue. Layers- in the middle there is bone marrow, compact bone surrounds the bone marrow. Compact bone is covered by periosteum.
5) nutrient foramen. Large open wound on her arm indicates fracture of nutrient canals.
It appears as protruded bone mass.
6) collagen fiber is found in fibrocartilage. Fibroblast and chondroblasts are required for formation of fibrocartilage.
7) osteoid is the term for new bone. Osteoblasts are required for formation of osteoid. the osteoblasts secrete an organic matrix made from collagen which later mineralizes and models its shape to fit the old bone.
8) bone remodeling is the term or bone resorption. Osteoasts are best suited for this. They are multinucleated cells.
9) The matrix of bone contains inorganic salts, primarily hydroxyapatite and some calcium carbonate, and collagen fibers. The organic matrix containing proteoglycans , glycosaminoglycans, glycoproteins, osteonectin and osteocalcin.
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