avascular
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[百] 대퇴골두무혈성괴사 (大腿骨頭無血性壞死) head of femur avascular necrosis
X선 검사로 무혈성괴사나 관절염이 확인되면 병의 진행 정도를 정확히 알아보기 위해 자기공명영상(MRI)과 컴퓨터단층촬영(CT) 검사를 진행한다.
When avascular necrosis or arthritis is confirmed by X-ray examination, magnetic resonance imaging (MRI) and computed tomography (CT) are performed to accurately determine the extent of the disease progression.
avascular (무혈관성) 혈관이 부족한.
avascular necrosis (무혈관성 괴사) 무균법과는 관련이 없지만 골괴사와 내재된 경색
(infarction)내로의 관절면 허탈 (collapse)을 유도하는 혈관장애 (혈관폐색, vascular
occlusion)를 동반하는 골경색 (bone infarction).
placenta : an organ characteristic of true mammals during pregnancy, joining mother and
offspring, providing endocrine secretion and selective exchange of soluble, but not
particulate, blood-borne substances through an apposition of uterine and trophoblastic
vascularized parts. According to species, the area of vascular apposition may be diffuse,
cotyledonary, zonary or discoid; the nature of apposition may be labyrinthine or villous;
the intimacy of apposition may vary according to what layers are lost of those
originally interposed between maternal and fetal blood (maternal endothelium, uterine
connective tissue, uterine epithelium, chorion, extraembryonic mesoderm, and endothelium
of villous capillary). The chorion may be joined by and receive blood vessels from either
the yolk sac or the allantois, and the uterine lining may be largely shed with the
chorion at birth (deciduate) or may separate from the chorion and remain (nondeciduate).
The human placenta is discoid, villous, haemochorial, chorioallantoic, and deciduate. After
birth, it weighs about 600 gm. and is about 16 cm. in diameter and 2 cm. thick,
discounting a principal functional part, the maternal blood in the intervillous space
(which leaks out at birth) into which the chorionic villi dip. The villi are grouped into
adjoining cotyledons making about 20 velvety bumps on the side of the placenta facing
outward to the uterus; the inner side of the placenta facing the fetus is smooth, being
covered with amnion, a thin avascular layer that continues past the edges of the
placenta to line the entire hollow sphere of chorion except where it is reflected to cover
the umbilical cord, which joins fetus and placenta. The cord usually joins the placenta
near the centre but may insert at the edge, on the nonplacental chorion, or on an
accessory placenta.
M87 골괴사증(Osteonecrosis)(540∼541쪽의 부위별 분류번호 참조)
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포함：뼈의 무혈관성 괴사증(avascular necrosis of bone)
제외：골연골병증(osteochondropathies)(M91-M93)
M87.0 뼈의 특발성 무균성 괴사증(Idiopathic aseptic necrosis of bone)
M87.1 약물에 의한 골괴사증(Osteonecrosis due to drugs)
원한다면, 약물 감별을 위해 추가로 외인분류번호(XX장)를 사용할 것.
M87.2 이전의 외상에 의한 골괴사증(Osteonecrosis due to previous trauma)
M87.3 기타 속발성 골괴사증(Other secondary osteonecrosis)
M87.8 기타 골괴사증(Other osteonecrosis)
M87.9 상세불명의 골괴사증(Osteonecrosis, unspecified)
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