変形矯正後の脊椎固定術における退行性矢状不均衡の安定化
Chang Ju Hwang1, Sang Yun Seok2, Young Tak Yu3
1Department of Orthopaedic Surgery, Seoul Asan Medical Center, Ulsan University School of Medicine, Seoul, South Korea.
Neurosurgery
|January 30, 2026
まとめ
退行性矢状不均衡患者の約30%が、手術後3ヶ月以内に腰椎前弯を減少させる。後方進入骨切り術は、変形矯正後の前弯減少のリスクを高める。
科学分野:
- 脊椎手術;整形外科手術;変形矯正
背景:
- 側方腰椎椎体間固定術は、退行性矢状不均衡(DSI)における前弯を回復させるために用いられる。;術後の前弯喪失は、手術成績に影響を与える可能性がある。;この前弯減少に寄与する要因を特定する必要がある。
研究 の 目的:
- 経過観察中の椎体固定術における腰椎前弯の変化を評価する。; DSI変形矯正後の腰椎前弯減少に関連する要因を特定する。
主な方法:
- DSI患者124例を対象とした後向き解析を実施し、2年以上の経過観察を行った。;前弯減少が≥5°であったかどうかに基づき、前弯維持群(n=86)と前弯喪失群(n=38)に層別化した。;前弯減少に影響を与える人口統計学的、放射線学的、および手術的要因を評価した。
主要な成果:
- 前弯減少は、維持群の1.42°に対し、喪失群では平均9.79°であった(P < .001)。; ほとんどの前弯喪失は術後3ヶ月以内に発生した。; 後方進入骨切り術は、前弯喪失と有意に関連していた(aOR=3.524、P=.020)。
結論:
- DSI患者の約30%が術後3ヶ月以内に椎体固定術の沈下を経験する。;終板損傷およびケージ沈下は、両群間で有意差はなかった。;後方進入骨切り術は、前弯減少の増加に関連する主要な要因である。
関連する概念動画
Nuclear Fusion
33.8K
The process of converting very light nuclei into heavier nuclei is also accompanied by the conversion of mass into large amounts of energy, a process called fusion. The principal source of energy in the sun is a net fusion reaction in which four hydrogen nuclei fuse and ultimately produce one helium nucleus and two positrons.
A helium nucleus has a mass that is 0.7% less than that of four hydrogen nuclei; this lost mass is converted into energy during the fusion. This reaction produces about...
A helium nucleus has a mass that is 0.7% less than that of four hydrogen nuclei; this lost mass is converted into energy during the fusion. This reaction produces about...
33.8K
Homeostatic Imbalance
33.7K
Homeostasis is the maintenance of a stable internal environment within the body, which is crucial for the proper functioning of cells, tissues, organs, and organ systems. The body has various control mechanisms that work together to regulate various physiological parameters such as temperature, blood pressure, pH balance, and fluid balance, to name a few. These control mechanisms are based on feedback loops that can be either positive or negative.
However, sometimes these feedback loops fail,...
However, sometimes these feedback loops fail,...
33.7K
Imbalances in Cardiac Output
2.9K
The heart's primary function is to pump blood throughout the body, maintaining a balance between blood sent out (cardiac output) and blood returning (venous return). If this balance is disrupted, it can result in congestive heart failure (CHF), a severe condition where the heart becomes an inefficient pump, leading to inadequate blood circulation.
CHF can occur due to the failure of either side of the heart. Left-side failure leads to pulmonary congestion—the right side continues to send...
CHF can occur due to the failure of either side of the heart. Left-side failure leads to pulmonary congestion—the right side continues to send...
2.9K
Distance Corrections
288
To achieve precise distance measurements, especially in surveying and construction, certain corrections must be applied to account for potential sources of error like the standardization errors, temperature variations, and slope adjustments.Standardization error emerges when measurement equipment undergoes changes, such as wear, repairs, or weather impacts. To address this, surveyors compare the equipment’s readings to a standard. This process identifies any deviation that might lead to...
288
Homeostatic Imbalances in Body Temperature
4.2K
Hyperthermia occurs when the body's temperature becomes unusually high, often due to heat exposure, intense physical activity, or certain illnesses. This condition can create a dangerous cycle where elevated body temperature increases the metabolic rate, generating more heat and potentially leading to organ failure and brain damage. A severe form of hyperthermia, called heat stroke, can raise body temperature to life-threatening levels. Fever, on the other hand, is a controlled form of...
4.2K
Plastic Deformations
461
Plastic deformation represents a fundamental concept in materials science, which explains the irreversible change in the shape of a material when it experiences stress beyond its elastic capability. This phenomenon is important in structural engineering, especially in designing and analyzing cantilever beams—structures that are securely fixed at one end and bear loads at the opposite end. When these beams are subjected to loads within their elastic range, they will return to their...
461


