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15 Cards in this Set
- Front
- Back
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what are (3) advantages to tissue expansion?
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match skin color/texture
specialized sensory function or adnexal characteristics (hair) more resistant to bacterial invasion than random cutaneous flaps |
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who was the first to do tissue expansion?
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1957, Neumann first used the principles of controlled tissue expansion in reconstructing an ear defect in which local skin was recruited using a subcutaneously placed rubber balloon.
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what are (4) disadvantages to tissue expansion?
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temporary cosmetic deformity during the expansion phase
prolonged period of expansion need for multiple procedures complications assd w/ procedures |
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why are expanded flaps hardier than acutely raised random-pattern flaps?
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expanded skin have increased vascularity on microangiography vs non-expanded skin
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how do the different layers of tissue react to tissue expansion?
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epidermis initially thickens
dermis demonstrates rapid thinning during the first 3 weeks skeletal muscle atrophies under expansion but retains its activity adipose tissue undergoes permanent atrophy of 30-50% with loss of fat cells |
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an increase in length in response to an applied force is known as _____.
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"creep"
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what do you call implants that function to both expand the tissues and act as the final prosthesis?
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Becker-type implant
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what is a good indicator of the maximum volume with which an implant can be filled at one time?
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patient discomfort
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how far should you expand tissue in relation to the defect?
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continue expansion until enough soft tissue to cover approximately twice the area of the defect has been achieved
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how long after the goal volume has been achieved should you wait prior to surgery?
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2-3 weeks to allow the expanded skin to soften and reduce the likelihood of contraction
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what are postoperative radiation therapy pts not good candidates for tissue expansion?
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because of the high rate of capsular contracture and wound complications
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what are the advantages of submuscular prosthetic experience?
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lower contracture and infection rates
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why is the reconstructed breast usually expanded larger than the contralateral breast?
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to allow for the creation of ptosis
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how much can hair-bearing tissue can be expanded to without a noticeable deficit in hair density?
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approximately twice its size
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The gain in surface area in tissue expansion procedures appears to result from _____.
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increased mitotic activity and represents new tissue
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