摘要
Background: Head motion, an important factor in acute subdural hematoma (ASDH), can be broken down into translational and rotational elements. We used three-dimensional finite element analysis to examine the thresholds of angular and tangential acceleration required to tear bridging veins in humans during head impact. Methods: The lengths of midsagittal and parasagittal bridging veins were calculated first. To assess the effect of translational and rotational acceleration, the strain of each vein was then computed under three different motions. The threshold of ASDH was expressed in terms of tangential and rotational acceleration. Results: Deformation-angle histories of the midsagittal and parasagittal bridging veins showed that veins that drain forward into the superior sinus at a 130-degree angle incurred the greatest stretch strain during occipital impact. In the midsagittal plane, pure rotation induced greater stretch strain on these veins (14.4%) than pure translation (2.5%) or combined translation and rotation motion (10.4%). A tangential acceleration of 3,912.9 G or an angular acceleration of 71.2 krad/s2 seemed to approximate the threshold for ASDH in the human midsagittal plane, whereas 5,010.9 G and 97.4 krad/s2 approximated the threshold in the parasagittal plane. Conclusion: Impact direction and orientation of bridging veins are both important factors in ASDH. Threshold criteria for ASDH can be expressed in terms of tangential and rotational acceleration.
| 原文 | 英語 |
|---|---|
| 頁（從 - 到） | 538-544 |
| 頁數 | 7 |
| 期刊 | Journal of Trauma - Injury, Infection and Critical Care |
| 卷 | 47 |
| 發行號 | 3 |
| DOIs | |
| 出版狀態 | 已發佈 - 九月 1999 |
指紋
ASJC Scopus subject areas
- Surgery
引用此文
Three-dimensional finite element analysis of subdural hematoma. / Huang, Haw Ming; Lee, Maw Chang; Chiu, Wen Ta; Chen, Chien Tsu; Lee, Sheng Yang.
於: Journal of Trauma - Injury, Infection and Critical Care, 卷 47, 編號 3, 09.1999, p. 538-544.研究成果: 雜誌貢獻 › 文章
}
TY - JOUR
T1 - Three-dimensional finite element analysis of subdural hematoma
AU - Huang, Haw Ming
AU - Lee, Maw Chang
AU - Chiu, Wen Ta
AU - Chen, Chien Tsu
AU - Lee, Sheng Yang
PY - 1999/9
Y1 - 1999/9
N2 - Background: Head motion, an important factor in acute subdural hematoma (ASDH), can be broken down into translational and rotational elements. We used three-dimensional finite element analysis to examine the thresholds of angular and tangential acceleration required to tear bridging veins in humans during head impact. Methods: The lengths of midsagittal and parasagittal bridging veins were calculated first. To assess the effect of translational and rotational acceleration, the strain of each vein was then computed under three different motions. The threshold of ASDH was expressed in terms of tangential and rotational acceleration. Results: Deformation-angle histories of the midsagittal and parasagittal bridging veins showed that veins that drain forward into the superior sinus at a 130-degree angle incurred the greatest stretch strain during occipital impact. In the midsagittal plane, pure rotation induced greater stretch strain on these veins (14.4%) than pure translation (2.5%) or combined translation and rotation motion (10.4%). A tangential acceleration of 3,912.9 G or an angular acceleration of 71.2 krad/s2 seemed to approximate the threshold for ASDH in the human midsagittal plane, whereas 5,010.9 G and 97.4 krad/s2 approximated the threshold in the parasagittal plane. Conclusion: Impact direction and orientation of bridging veins are both important factors in ASDH. Threshold criteria for ASDH can be expressed in terms of tangential and rotational acceleration.
AB - Background: Head motion, an important factor in acute subdural hematoma (ASDH), can be broken down into translational and rotational elements. We used three-dimensional finite element analysis to examine the thresholds of angular and tangential acceleration required to tear bridging veins in humans during head impact. Methods: The lengths of midsagittal and parasagittal bridging veins were calculated first. To assess the effect of translational and rotational acceleration, the strain of each vein was then computed under three different motions. The threshold of ASDH was expressed in terms of tangential and rotational acceleration. Results: Deformation-angle histories of the midsagittal and parasagittal bridging veins showed that veins that drain forward into the superior sinus at a 130-degree angle incurred the greatest stretch strain during occipital impact. In the midsagittal plane, pure rotation induced greater stretch strain on these veins (14.4%) than pure translation (2.5%) or combined translation and rotation motion (10.4%). A tangential acceleration of 3,912.9 G or an angular acceleration of 71.2 krad/s2 seemed to approximate the threshold for ASDH in the human midsagittal plane, whereas 5,010.9 G and 97.4 krad/s2 approximated the threshold in the parasagittal plane. Conclusion: Impact direction and orientation of bridging veins are both important factors in ASDH. Threshold criteria for ASDH can be expressed in terms of tangential and rotational acceleration.
KW - Acute subdural hematoma
KW - Biomechanics
KW - Bridging vein
KW - Finite element
UR - http://www.scopus.com/inward/record.url?scp=0032826550&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0032826550&partnerID=8YFLogxK
U2 - 10.1097/00005373-199909000-00019
DO - 10.1097/00005373-199909000-00019
M3 - Article
C2 - 10498311
AN - SCOPUS:0032826550
VL - 47
SP - 538
EP - 544
JO - Journal of Trauma and Acute Care Surgery
JF - Journal of Trauma and Acute Care Surgery
SN - 2163-0755
IS - 3
ER -