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Nagashima Y, Araki Y, Nishida K, Kuramitsu S, Wakabayashi K, Shimato S, Kinkori T, Nishizawa T, Kano T, Hasegawa T, Noda A, Maeda K, Yamamoto Y, Suzuki O, Koketsu N, Okada T, Iwasaki M, Nakabayashi K, Fujitani S, Maki H, Kuwatsuka Y, Nishihori M, Tanei T, Nishikawa T, Nishimura Y, Saito R. Efficacy of intraoperative irrigation with artificial cerebrospinal fluid in chronic subdural hematoma surgery: study protocol for a multicenter randomized controlled trial. Trials 2024; 25:6. [PMID: 38166992 PMCID: PMC10759626 DOI: 10.1186/s13063-023-07889-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2023] [Accepted: 12/17/2023] [Indexed: 01/05/2024] Open
Abstract
BACKGROUND The surgical techniques for treatment of chronic subdural hematoma (CSDH), a common neurosurgical condition, have been discussed in a lot of clinical literature. However, the recurrence proportion after CSDH surgery remains high, ranging from 10 to 20%. The standard surgical procedure for CSDH involves a craniostomy to evacuate the hematoma, but irrigating the hematoma cavity during the procedure is debatable. The authors hypothesized that the choice of irrigation fluid might be a key factor affecting the outcomes of surgery. This multicenter randomized controlled trial aims to investigate whether intraoperative irrigation using artificial cerebrospinal fluid (ACF) followed by the placement of a subdural drain would yield superior results compared to the placement of a subdural drain alone for CSDH. METHODS The study will be conducted across 19 neurosurgical departments in Japan. The 1186 eligible patients will be randomly allocated to two groups: irrigation using ACF or not. In either group, a subdural drain is to be placed for at least 12 h postoperatively. Similar to what was done in previous studies, we set the proportion of patients that meet the criteria for ipsilateral reoperation at 7% in the irrigation group and 12% in the non-irrigation group. The primary endpoint is the proportion of patients who meet the criteria for ipsilateral reoperation within 6 months of surgery (clinical worsening of symptoms and increased hematoma on imaging compared with the postoperative state). The secondary endpoints are the proportion of reoperations within 6 months, the proportion being stratified by preoperative hematoma architecture by computed tomography (CT) scan, neurological symptoms, patient condition, mortality at 6 months, complications associated with surgery, length of hospital stay from surgery to discharge, and time of the surgical procedure. DISCUSSION We present the study protocol for a multicenter randomized controlled trial to investigate our hypothesis that intraoperative irrigation with ACF reduces the recurrence proportion after the removal of chronic subdural hematomas compared with no irrigation. TRIAL REGISTRATION ClinicalTrials.gov jRCT1041220124. Registered on January 13, 2023.
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Affiliation(s)
- Yoshitaka Nagashima
- Department of Neurosurgery, Nagoya University Graduate School of Medicine, Nagoya, Japan.
| | - Yoshio Araki
- Department of Neurosurgery, Nagoya University Graduate School of Medicine, Nagoya, Japan
- Department of Neurosurgery, Japanese Red Cross Aichi Medical Center Nagoya Daini Hospital, Nagoya, Japan
| | - Kazuki Nishida
- Department of Advanced Medicine, Nagoya University Hospital, Nagoya, Japan
| | - Shunichiro Kuramitsu
- Department of Neurosurgery, National Hospital Organization Nagoya Medical Center, Nagoya, Japan
| | | | - Shinji Shimato
- Department of Neurosurgery, Handa City Hospital, Handa, Japan
| | - Takeshi Kinkori
- Department of Neurosurgery, Okazaki City Hospital, Okazaki, Japan
| | | | - Takahisa Kano
- Department of Neurosurgery, Anjo Kosei Hospital, Anjo, Japan
| | | | - Atsushi Noda
- Department of Neurosurgery, Nishio Municipal Hospital, Nishio, Japan
| | - Kenko Maeda
- Department of Neurosurgery, JCHO Chukyo Hospital, Nagoya, Japan
| | - Yu Yamamoto
- Department of Neurosurgery, Inazawa Municipal Hospital, Inazawa, Japan
| | - Osamu Suzuki
- Department of Neurosurgery, Nagoya Ekisaikai Hospital, Nagoya, Japan
| | - Naoki Koketsu
- Department of Neurosurgery, Tosei General Hospital, Seto, Japan
| | - Takeshi Okada
- Department of Neurosurgery, Kainan Hospital, Yatomi, Japan
| | - Masashige Iwasaki
- Department of Neurosurgery, Shizuoka Saiseikai General Hospital, Shizuoka, Japan
| | - Kiyo Nakabayashi
- Department of Neurosurgery, Yokkaichi Municipal Hospital, Yokkaichi, Japan
| | - Shigeru Fujitani
- Department of Neurosurgery, Japanese Red Cross Aichi Medical Center Nagoya Daiichi Hospital, Nagoya, Japan
| | - Hideki Maki
- Department of Neurosurgery, Ogaki Municipal Hospital, Ogaki, Japan
| | - Yachiyo Kuwatsuka
- Department of Advanced Medicine, Nagoya University Hospital, Nagoya, Japan
| | - Masahiro Nishihori
- Department of Neurosurgery, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Takafumi Tanei
- Department of Neurosurgery, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Tomohide Nishikawa
- Department of Neurosurgery, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Yusuke Nishimura
- Department of Neurosurgery, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Ryuta Saito
- Department of Neurosurgery, Nagoya University Graduate School of Medicine, Nagoya, Japan
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Stroh N, Stefanits H, Maletzky A, Kaltenleithner S, Thumfart S, Giretzlehner M, Drexler R, Ricklefs FL, Dührsen L, Aspalter S, Rauch P, Gruber A, Gmeiner M. Machine learning based outcome prediction of microsurgically treated unruptured intracranial aneurysms. Sci Rep 2023; 13:22641. [PMID: 38114635 PMCID: PMC10730905 DOI: 10.1038/s41598-023-50012-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2023] [Accepted: 12/14/2023] [Indexed: 12/21/2023] Open
Abstract
Machine learning (ML) has revolutionized data processing in recent years. This study presents the results of the first prediction models based on a long-term monocentric data registry of patients with microsurgically treated unruptured intracranial aneurysms (UIAs) using a temporal train-test split. Temporal train-test splits allow to simulate prospective validation, and therefore provide more accurate estimations of a model's predictive quality when applied to future patients. ML models for the prediction of the Glasgow outcome scale, modified Rankin Scale (mRS), and new transient or permanent neurological deficits (output variables) were created from all UIA patients that underwent microsurgery at the Kepler University Hospital Linz (Austria) between 2002 and 2020 (n = 466), based on 18 patient- and 10 aneurysm-specific preoperative parameters (input variables). Train-test splitting was performed with a temporal split for outcome prediction in microsurgical therapy of UIA. Moreover, an external validation was conducted on an independent external data set (n = 256) of the Department of Neurosurgery, University Medical Centre Hamburg-Eppendorf. In total, 722 aneurysms were included in this study. A postoperative mRS > 2 was best predicted by a quadratic discriminant analysis (QDA) estimator in the internal test set, with an area under the receiver operating characteristic curve (ROC-AUC) of 0.87 ± 0.03 and a sensitivity and specificity of 0.83 ± 0.08 and 0.71 ± 0.07, respectively. A Multilayer Perceptron predicted the post- to preoperative mRS difference > 1 with a ROC-AUC of 0.70 ± 0.02 and a sensitivity and specificity of 0.74 ± 0.07 and 0.50 ± 0.04, respectively. The QDA was the best model for predicting a permanent new neurological deficit with a ROC-AUC of 0.71 ± 0.04 and a sensitivity and specificity of 0.65 ± 0.24 and 0.60 ± 0.12, respectively. Furthermore, these models performed significantly better than the classic logistic regression models (p < 0.0001). The present results showed good performance in predicting functional and clinical outcomes after microsurgical therapy of UIAs in the internal data set, especially for the main outcome parameters, mRS and permanent neurological deficit. The external validation showed poor discrimination with ROC-AUC values of 0.61, 0.53 and 0.58 respectively for predicting a postoperative mRS > 2, a pre- and postoperative difference in mRS > 1 point and a GOS < 5. Therefore, generalizability of the models could not be demonstrated in the external validation. A SHapley Additive exPlanations (SHAP) analysis revealed that this is due to the most important features being distributed quite differently in the internal and external data sets. The implementation of newly available data and the merging of larger databases to form more broad-based predictive models is imperative in the future.
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Affiliation(s)
- Nico Stroh
- Department of Neurosurgery, Kepler University Hospital, Johannes Kepler University, Linz, Austria
| | - Harald Stefanits
- Department of Neurosurgery, Kepler University Hospital, Johannes Kepler University, Linz, Austria.
| | | | | | | | | | - Richard Drexler
- Department of Neurosurgery, University Medical Centre Hamburg-Eppendorf, Hamburg, Germany
| | - Franz L Ricklefs
- Department of Neurosurgery, University Medical Centre Hamburg-Eppendorf, Hamburg, Germany
| | - Lasse Dührsen
- Department of Neurosurgery, University Medical Centre Hamburg-Eppendorf, Hamburg, Germany
| | - Stefan Aspalter
- Department of Neurosurgery, Kepler University Hospital, Johannes Kepler University, Linz, Austria
| | - Philip Rauch
- Department of Neurosurgery, Kepler University Hospital, Johannes Kepler University, Linz, Austria
| | - Andreas Gruber
- Department of Neurosurgery, Kepler University Hospital, Johannes Kepler University, Linz, Austria
| | - Matthias Gmeiner
- Department of Neurosurgery, Kepler University Hospital, Johannes Kepler University, Linz, Austria
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