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Basilio AV, Zeng D, Pichay LA, Ateshian GA, Xu P, Maas SA, Morrison B. Simulating Cerebral Edema and Ischemia After Traumatic Acute Subdural Hematoma Using Triphasic Swelling Biomechanics. Ann Biomed Eng 2024:10.1007/s10439-024-03496-y. [PMID: 38532172 DOI: 10.1007/s10439-024-03496-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2023] [Accepted: 03/14/2024] [Indexed: 03/28/2024]
Abstract
Poor outcome following traumatic acute subdural hematoma (ASDH) is associated with the severity of the primary injury and secondary injury including cerebral edema and ischemia. However, the underlying secondary injury mechanism contributing to elevated intracranial pressure (ICP) and high mortality rate remains unclear. Cerebral edema occurs in response to the exposure of the intracellular fixed charge density (FCD) after cell death, causing ICP to increase. The increased ICP from swollen tissue compresses blood vessels in adjacent tissue, restricting blood flow and leading to ischemic damage. We hypothesize that the mass occupying effect of ASDH exacerbates the ischemic injury, leading to ICP elevation, which is an indicator of high mortality rate in the clinic. Using FEBio (febio.org) and triphasic swelling biomechanics, this study modeled clinically relevant ASDHs and simulated post-traumatic brain swelling and ischemia to predict ICP. Results showed that common convexity ASDH significantly increased ICP by exacerbating ischemic injury, and surgical removal of the convexity ASDH may control ICP by preventing ischemia progression. However, in cases where the primary injury is very severe, surgical intervention alone may not effectively decrease ICP, as the contribution of the hematoma to the elevated ICP is insignificant. In addition, interhemispheric ASDH, located between the cerebral hemispheres, does not significantly exacerbate ischemia, supporting the conservative surgical management generally recommended for interhemispheric ASDH. The joint effect of the mass occupying effect of the blood clot and resulting ischemia contributes to elevated ICP which may increase mortality. Our novel approach may improve the fidelity of predicting patient outcome after motor vehicle crashes and traumatic brain injuries due to other causes.
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Affiliation(s)
- Andrew V Basilio
- Department of Biomedical Engineering, Columbia University, 351 Engineering Terrace MC 8904, 1210 Amsterdam Avenue, New York, NY, 10027, USA
| | - Delin Zeng
- Department of Biomedical Engineering, Columbia University, 351 Engineering Terrace MC 8904, 1210 Amsterdam Avenue, New York, NY, 10027, USA
| | - Leanne A Pichay
- Department of Biomedical Engineering, Columbia University, 351 Engineering Terrace MC 8904, 1210 Amsterdam Avenue, New York, NY, 10027, USA
| | - Gerard A Ateshian
- Department of Biomedical Engineering, Columbia University, 351 Engineering Terrace MC 8904, 1210 Amsterdam Avenue, New York, NY, 10027, USA
- Department of Mechanical Engineering, Columbia University, 220 S. W. Mudd Building, 500 West 120th Street, New York, NY, 10027, USA
| | - Peng Xu
- Department of Biomedical Engineering, Columbia University, 351 Engineering Terrace MC 8904, 1210 Amsterdam Avenue, New York, NY, 10027, USA
| | - Steve A Maas
- Department of Bioengineering, University of Utah, 36 S. Wasatch Drive, SMBB 3100, Salt Lake City, UT, 84112, USA
| | - Barclay Morrison
- Department of Biomedical Engineering, Columbia University, 351 Engineering Terrace MC 8904, 1210 Amsterdam Avenue, New York, NY, 10027, USA.
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Teshita G, Wondafrash M, G/Egziabher B, Getachew B, Bergene E. Clinical characteristics and functional outcome of surgically treated adult head trauma patients with acute subdural hematoma: Ethiopian tertiary hospitals experience. World Neurosurg X 2024; 21:100264. [PMID: 38260115 PMCID: PMC10801322 DOI: 10.1016/j.wnsx.2023.100264] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2023] [Revised: 10/29/2023] [Accepted: 11/28/2023] [Indexed: 01/24/2024] Open
Abstract
Background Acute subdural hematoma (ASDH) is one of the most common and devastating lesions in traumatic brain injury with a mortality rate upto 60 % especially in low-income countries. The present study aimed to determine the clinical characteristics and functional outcomes and the associated factors of surgically treated head trauma patients with ASDH. Methods Between January 2018 and January 2021 we identified 140 head trauma patients with ASDH who underwent surgical evacuation in three tertiary hospitals. Epidemiological data were collected; the six-month functional outcome was studied using an extended Glasgow outcome score (EGOS) and associated factors were also studied. Univariate analysis was performed at first, and variables with a P-value of <0.05 were entered into the multivariable logistic regression model. Results Male predominance was seen accounting for 87 % and assault was the most common mechanism of injury (35.7 %). Sixty-five (56.5 %) of patients achieved favorable functional recovery (EGOS of 5-8) and 50 (43.5 %) of patients had unfavorable recovery (EGOS of 1-4) after 6 months of follow-up. In multivariate logistic regression models, GCS <5, Pupillary abnormality, hypotension, oxygen saturation <90 at presentation, and hospital-acquired pneumonia were the independent factors associated with unfavorable functional outcomes. Conclusion In our setup, most of the patients are male from assault injuries. There is still a high rate of unfavorable outcomes in patients with acute subdural hematoma. GCS <5, pupillary abnormality, hypotension and desaturation at presentation, and postoperative hospital-acquired infection are predictors for unfavorable functional outcomes.
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Affiliation(s)
- Gemechu Teshita
- Department of Neurosurgery, Minilik Referral Hospital, Addis Ababa, Ethiopia
| | - Mulualem Wondafrash
- Department of Neurosurgery, Saint Paul's Hospital Millennium Medical College, Addis Ababa, Ethiopia
| | - Biniam G/Egziabher
- Department of Neurosurgery, Saint Paul's Hospital Millennium Medical College, Addis Ababa, Ethiopia
| | - Biruk Getachew
- Department of Neurosurgery, Saint Paul's Hospital Millennium Medical College, Addis Ababa, Ethiopia
| | - Eyerusalem Bergene
- Department of Neurosurgery, Saint Paul's Millennium Medical College, Addis Ababa, Ethiopia
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Fernandes FAO, Silveira CIC. The Significance of Cross-Sectional Shape Accuracy and Non-Linear Elasticity on the Numerical Modelling of Cerebral Veins under Tensile Loading. BIOLOGY 2023; 13:16. [PMID: 38248447 PMCID: PMC10813171 DOI: 10.3390/biology13010016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/20/2023] [Revised: 12/19/2023] [Accepted: 12/22/2023] [Indexed: 01/23/2024]
Abstract
Traumatic brain injury (TBI) is a serious global health issue, leading to serious disabilities. One type of TBI is acute subdural haematoma (ASDH), which occurs when a bridging vein ruptures. Many numerical models of these structures, mainly based on the finite element method, have been developed. However, most rely on linear elasticity (without validation) and others on simplifications at the geometrical level. An example of the latter is the assumption of a regular cylinder with a constant radius, or the geometry of the vein acquired from medical images. Unfortunately, these do not replicate the real conditions of a mechanical tensile test. In this work, the main goal is to evaluate the influence of the vein's geometry in its mechanical behaviour under tensile loading, simulating the real conditions of experimental tests. The second goal is to implement a hyperelastic model of the bridging veins where it would be possible to observe its non-linear elastic behaviour. The results of the developed finite element models were compared to experimental data available in the literature and other models. It was possible to conclude that the geometry of the vein structure influences the tensile stress-strain curve, which means that flattened specimens should be modelled when validating constitutive models for bridging veins. Additionally, the implementation of hyperelastic material models has been verified, highlighting the potential application of the Marlow and reduced polynomial (of fourth and sixth orders) constitutive models.
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Affiliation(s)
- Fábio A. O. Fernandes
- TEMA—Centre for Mechanical Technology and Automation, Department of Mechanical Engineering, University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal
- LASI—Intelligent Systems Associate Laboratory, 4800-058 Guimarães, Portugal
| | - Clara I. C. Silveira
- Department of Physics, University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal
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Vychopen M, Hamed M, Bahna M, Racz A, Ilic I, Salemdawod A, Schneider M, Lehmann F, Eichhorn L, Bode C, Jacobs AH, Behning C, Schuss P, Güresir E, Vatter H, Borger V. A Validation Study for SHE Score for Acute Subdural Hematoma in the Elderly. Brain Sci 2022; 12:981. [PMID: 35892422 PMCID: PMC9330492 DOI: 10.3390/brainsci12080981] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2022] [Revised: 07/10/2022] [Accepted: 07/18/2022] [Indexed: 01/27/2023] Open
Abstract
OBJECTIVE The aim of this study was the verification of the Subdural Hematoma in the Elderly (SHE) score proposed by Alford et al. as a mortality predictor in patients older than 65 years with nontraumatic/minor trauma acute subdural hematoma (aSDH). Additionally, we evaluated further predictors associated with poor outcome. METHODS Patients were scored according to age (1 point is given if patients were older than 80 years), GCS by admission (1 point for GCS 5-12, 2 points for GCS 3-4), and SDH volume (1 point for volume 50 mL). The sum of points determines the SHE score. Multivariate logistic regression analysis was performed to identify additional independent risk factors associated with 30-day mortality. RESULTS We evaluated 131 patients with aSDH who were treated at our institution between 2008 and 2020. We observed the same 30-day mortality rates published by Alford et al.: SHE 0: 4.3% vs. 3.2%, p = 1.0; SHE 1: 12.2% vs. 13.1%, p = 1.0; SHE 2: 36.6% vs. 32.7%, p = 0.8; SHE 3: 97.1% vs. 95.7%, p = 1.0 and SHE 4: 100% vs. 100%, p = 1.0. Additionally, 18 patients who developed status epilepticus (SE) had a mortality of 100 percent regardless of the SHE score. The distribution of SE among the groups was: 1 for SHE 1, 6 for SHE 2, 9 for SHE 3, and 2 for SHE 4. The logistic regression showed the surgical evacuation to be the only significant risk factor for developing the seizure. All patients who developed SE underwent surgery (p = 0.0065). Furthermore, SHE 3 and 4 showed no difference regarding the outcome between surgical and conservative treatment. CONCLUSIONS SHE score is a reliable mortality predictor for minor trauma acute subdural hematoma in elderly patients. In addition, we identified status epilepticus as a strong life-expectancy-limiting factor in patients undergoing surgical evacuation.
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Affiliation(s)
- Martin Vychopen
- Department of Neurosurgery, University Hospital Bonn, 53127 Bonn, Germany; (M.H.); (M.B.); (I.I.); (A.S.); (M.S.); (P.S.); (E.G.); (H.V.); (V.B.)
| | - Motaz Hamed
- Department of Neurosurgery, University Hospital Bonn, 53127 Bonn, Germany; (M.H.); (M.B.); (I.I.); (A.S.); (M.S.); (P.S.); (E.G.); (H.V.); (V.B.)
| | - Majd Bahna
- Department of Neurosurgery, University Hospital Bonn, 53127 Bonn, Germany; (M.H.); (M.B.); (I.I.); (A.S.); (M.S.); (P.S.); (E.G.); (H.V.); (V.B.)
| | - Attila Racz
- Department of Epileptology, University Hospital Bonn, 53127 Bonn, Germany;
| | - Inja Ilic
- Department of Neurosurgery, University Hospital Bonn, 53127 Bonn, Germany; (M.H.); (M.B.); (I.I.); (A.S.); (M.S.); (P.S.); (E.G.); (H.V.); (V.B.)
| | - Abdallah Salemdawod
- Department of Neurosurgery, University Hospital Bonn, 53127 Bonn, Germany; (M.H.); (M.B.); (I.I.); (A.S.); (M.S.); (P.S.); (E.G.); (H.V.); (V.B.)
| | - Matthias Schneider
- Department of Neurosurgery, University Hospital Bonn, 53127 Bonn, Germany; (M.H.); (M.B.); (I.I.); (A.S.); (M.S.); (P.S.); (E.G.); (H.V.); (V.B.)
| | - Felix Lehmann
- Department of Anesthesiology and Intensive Care Medicine, University Hospital Bonn, 53127 Bonn, Germany; (F.L.); (L.E.); (C.B.)
| | - Lars Eichhorn
- Department of Anesthesiology and Intensive Care Medicine, University Hospital Bonn, 53127 Bonn, Germany; (F.L.); (L.E.); (C.B.)
| | - Christian Bode
- Department of Anesthesiology and Intensive Care Medicine, University Hospital Bonn, 53127 Bonn, Germany; (F.L.); (L.E.); (C.B.)
| | - Andreas H. Jacobs
- Department of Geriatric Medicine and Neurology, Johanniter Hospital Bonn, 53113 Bonn, Germany;
| | - Charlotte Behning
- Department of Medical Biometry, Informatics and Epidemiology, University Hospital Bonn, 53127 Bonn, Germany;
| | - Patrick Schuss
- Department of Neurosurgery, University Hospital Bonn, 53127 Bonn, Germany; (M.H.); (M.B.); (I.I.); (A.S.); (M.S.); (P.S.); (E.G.); (H.V.); (V.B.)
| | - Erdem Güresir
- Department of Neurosurgery, University Hospital Bonn, 53127 Bonn, Germany; (M.H.); (M.B.); (I.I.); (A.S.); (M.S.); (P.S.); (E.G.); (H.V.); (V.B.)
| | - Hartmut Vatter
- Department of Neurosurgery, University Hospital Bonn, 53127 Bonn, Germany; (M.H.); (M.B.); (I.I.); (A.S.); (M.S.); (P.S.); (E.G.); (H.V.); (V.B.)
| | - Valeri Borger
- Department of Neurosurgery, University Hospital Bonn, 53127 Bonn, Germany; (M.H.); (M.B.); (I.I.); (A.S.); (M.S.); (P.S.); (E.G.); (H.V.); (V.B.)
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