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Wu B, Huang Z, Liu H, He J, Ju Y, Chen Z, Zhang T, Yi F. Ultra-early endovascular treatment improves prognosis in High grade aneurysmal subarachnoid hemorrhage: A single-center retrospective study. Front Neurol 2022; 13:963624. [PMID: 36034293 PMCID: PMC9413045 DOI: 10.3389/fneur.2022.963624] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2022] [Accepted: 07/20/2022] [Indexed: 11/13/2022] Open
Abstract
Background The long-term survival prognosis of patients with high-grade (Hunt-Hess grade IV–V or World Federation of Neurosurgical Societies grade IV–V) aneurysmal subarachnoid hemorrhage (aSAH) is generally poor, and the association between endovascular treatment timing and the prognosis of high-grade aSAH has not been explored in depth. This retrospective cohort study aimed to determine whether endovascular treatment within 24 h of high-grade aSAH is associated with a better prognosis. Methods We retrospectively analyzed the clinical data of patients with high-grade aSAH who were admitted to our institution between January 2018 and January 2021. The Modified Rankin Scale score was used to assess the 6-month prognosis of patients. Univariate and multivariate logistic regression analyses were used to identify the factors associated with prognosis. The area under the receiver operating characteristic (ROC) curve was used to assess the model's discriminatory ability. Results Eighty-six patients were included in the study. In the multivariate analysis, the timing of endovascular treatment (odds ratio = 7.003 [1.800–27.242], P = 0.005) was an independent risk factor for prognosis. The ROC curve showed that the predictive power of the timing of endovascular treatment was 0.744, the best cut-off value was 12.5 h, and the corresponding sensitivity and specificity were 71.4 and 70.5%, respectively. Hydrocephalus (P = 0.005) and pulmonary infection (P = 0.029) were also associated with prognosis. In addition, cerebrospinal fluid drainage immediately after endovascular treatment had a significant effect on reducing hydrocephalus formation. Conclusions Endovascular therapy within 24 h is feasible and improves the prognosis of patients with high-grade aSAH.
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Affiliation(s)
- Botao Wu
- Department of Neurosurgery, The First Affiliated Hospital of Jinzhou Medical University, Jinzhou, China
| | - Zhe Huang
- Department of Radiology, The First Affiliated Hospital of Jinzhou Medical University, Jinzhou, China
| | - Huan Liu
- Department of General Surgery, Zhongshan Hospital of Traditional Chinese Medicine, Guangzhou University of Traditional Chinese Medicine, Zhongshan, China
| | - Jiayao He
- Department of Orthopedics, Affiliated Hospital of Chengdu University, Chengdu, China
| | - Yan Ju
- Department of Endocrinology, The First Affiliated Hospital of Jinzhou Medical University, Jinzhou, China
| | - Ziwei Chen
- Department of Neurosurgery, The Third Affiliated Hospital of Jinzhou Medical University, Jinzhou, China
| | - Taiwei Zhang
- Department of Neurosurgery, The First Affiliated Hospital of Jinzhou Medical University, Jinzhou, China
| | - Fuxin Yi
- Department of Neurosurgery, The First Affiliated Hospital of Jinzhou Medical University, Jinzhou, China
- *Correspondence: Fuxin Yi
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Tykocki T, Czyż M, Machaj M, Szydlarska D, Kostkiewicz B. Comparison of the timing of intervention and treatment modality of poor-grade aneurysmal subarachnoid hemorrhage. Br J Neurosurg 2017; 31:430-433. [PMID: 28436243 DOI: 10.1080/02688697.2017.1319906] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
OBJECTIVES The timing and modality of intervention in the treatment of poor-grade aneurysmal subarachnoid haemorrhage (aSAH) has not been defined. The purpose of the study is to analyse whether early treatment and type of intervention influence the clinical outcomes of poor-grade aSAH patients. MATERIAL AND METHODS Patients with poor-grade aSAH were retrieved. Demographics, Fisher grade, radiological characteristics and clinical outcomes were recorded. Outcomes were compared using the modified Rankin Scale (mRS), for groups treated early within 24 hours of aSAH or later and by clipping or endovascular therapy. Multivariate multiple regression model and logistic regression were used to assess factors affecting outcomes at discharge in mRS and length of stay. RESULTS The study was conducted on 79 patients. 47 (59%) were treated by clipping, 38 (48%) received intervention within 24 hours of aSAH. Patients treated <24h had significantly lower mortality (n = 5; 13% vs. n = 14; 37%; p < .023), higher rate of 0-3 mRS (n = 22;58% vs. n = 9; 22%; p < .039) and were younger (49.5 ± 6.1 vs. 65.8 ± 7.4 years; p < .038). There were no significant differences in mRS between clipping and endovascular therapy. Predictors of length of stay were ICH, MLS, endovascular therapy, location in posterior circulation, Fisher grade and time to intervention <24h. Early intervention, <24h significantly influenced the favourable results in mRS (0-3); (OR 4,14; Cl95% 3.82-4.35). Posterior circulation aneurysms, midline shift and intracerebral hematoma were correlated with poor outcomes. CONCLUSIONS Early treatment, within 24 h, of poor-grade aSAH confirmed better clinical outcome compared to later aneurysm securement. There was no significant difference between clipping and endovascular treatment.
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Affiliation(s)
- Tomasz Tykocki
- a Department of Neurosurgery , Institute of Psychiatry and Neurology in Warsaw , Warsaw , Poland
| | - Marcin Czyż
- b The Centre for Spinal Studies and Surgery , Queens Medical Centre , Nottingham , UK
| | - Małgorzata Machaj
- c Department of Human Resource , Central Clinical Hospital of the Ministry of the Interior in Warsaw , Warsaw , Poland
| | - Dorota Szydlarska
- d Family Medicine Outpatient Clinic with Vaccination Centre , Central Clinical Hospital of the Ministry of the Interior in Warsaw , Warsaw , Poland
| | - Bogusław Kostkiewicz
- e Department of Neurosurgery , Central Clinical Hospital of the Ministry of the Interior in Warsaw , Warsaw , Poland
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Zhang Q, Ma L, Liu Y, He M, Sun H, Wang X, Fang Y, Hui XH, You C. Timing of operation for poor-grade aneurysmal subarachnoid hemorrhage: study protocol for a randomized controlled trial. BMC Neurol 2013; 13:108. [PMID: 23957458 PMCID: PMC3751917 DOI: 10.1186/1471-2377-13-108] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2013] [Accepted: 08/15/2013] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Subarachnoid hemorrhage is a common and dangerous disease with an unfavorable prognosis. Patients with poor-grade subarachnoid hemorrhage (Hunt & Hess Grades 4-5) are unconscious on admission. Because of the high mortality and disability rate associated with poor-grade subarachnoid hemorrhage, it is often treated conservatively. Timing of surgery for poor-grade aneurysmal subarachnoid hemorrhage is still controversial, therefore this study aims to identify the optimal time to operate on patients admitted in poor clinical condition. METHODS/DESIGN Ninety-nine patients meeting the inclusion criteria were randomly assigned into three treatment groups. The early surgery group received operation within 3 days after onset of subarachnoid hemorrhage (day of SAH = day 1); the intermediate surgery group received operation from days 4 to 7, and surgery was performed on the late surgery group after day 7. Follow-up was performed 1, 3, and 6 months after aneurysm clipping. Primary indicators of outcome included the Extended Glasgow Outcome Scale and the Modified Rankin Scale, while secondary indicators of outcome were assessed using the Barthel Index and mortality. DISCUSSION This is the first prospective, single-center, observer-blinded, randomized controlled trial to elucidate optimal timing for surgery in poor-grade subarachnoid hemorrhage patients. The results of this study will be used to direct decisions of surgical intervention in poor-grade subarachnoid hemorrhage, thus improving clinical outcomes for patients. TRIAL REGISTRATION Chinese Clinical Trial Registry: ChiCTR-TRC-12002917.
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Mueller OM, Schlamann M, Mueller D, Sandalcioglu IE, Forsting M, Sure U. Intracranial aneurysms: optimized diagnostic tools call for thorough interdisciplinary treatment strategies. Ther Adv Neurol Disord 2011; 4:267-79. [PMID: 22010040 DOI: 10.1177/1756285611415309] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
OBJECTIVE Intracranial aneurysms (IAs) require deliberately selected treatment strategies as they are incrementally found prior to rupture and deleterious subarachnoid haemorrhage (SAH). Multiple and recurrent aneurysms necessitate both neurointerventionalists and neurosurgeons to optimize aneurysmal occlusion in an interdisciplinary effort. The present study was conducted to condense essential strategies from a single neurovascular centre with regard to the lessons learned. METHOD Medical charts of 321 consecutive patients treated for IAs at our centre from September 2008 until December 2010 were retrospectively analysed for clinical presentation of the aneurysms, multiplicity and treatment pathways. In addition, a selective Medline search was performed. RESULTS A total of 321 patients with 492 aneurysms underwent occlusion of their symptomatic aneurysm: 132 (41.1%) individuals were treated surgically, 189 (58.2%) interventionally; 138 patients presented with a SAH, of these 44.2% were clipped and 55.8% were coiled. Aneurysms of the middle cerebral artery were primarily occluded surgically (88), whereas most of the aneurysms of the internal carotid artery and anterior communicating artery (114) were treated endovascularly. Multiple aneurysms (range 2-5 aneurysms/individual) were diagnosed in 98 patients (30.2%). During the study period 12 patients with recurrent aneurysms were allocated to another treatment modality (previously clip to coil and vice versa). CONCLUSIONS Our data show that successful interdisciplinary occlusion of IAs is based on both neurosurgical and neurointerventional therapy. In particular, multiple and recurrent aneurysms require tailored individual approaches to aneurysmal occlusion. This is achieved by a consequent interdisciplinary pondering of the optimal strategy to occlude IAs in order to prevent SAH.
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Affiliation(s)
- Oliver M Mueller
- Department of Neurosurgery, University Hospital Essen, Essen, Germany
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Hemorragia subaracnoidea aneurismática: Guía de tratamiento del Grupo de Patología Vascular de la Sociedad Española de Neurocirugía. Neurocirugia (Astur) 2011. [DOI: 10.1016/s1130-1473(11)70007-0] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Cheong JJY, Ghinea N, van Gelder JM. Estimating the annual rate of de novo multiple aneurysms: three statistical approaches. Neurosurg Focus 2004; 17:E8. [PMID: 15633985 DOI: 10.3171/foc.2004.17.5.8] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Object
Individuals with unruptured intracranial aneurysms experience a higher rate of rupture if their history includes another aneurysm that has previously bled. The authors used systematic review and metaregression to estimate the annual rate of development of second de novo aneurysms after subarachnoid hemorrhage.
Methods
This investigation included studies in which more than 300 patients with intracranial aneurysms were described, and in which the age of the patients and the proportion with multiple aneurysms were documented. Studies describing delayed follow-up angiography that was performed after treatment of aneurysms were also reviewed.
Twenty studies were included in a between-study analysis. The univariate odds ratio (OR) for multiple intracranial aneurysms per year of age was 1.085 (95% confidence interval [CI] 1.015–1.165); this value was calculated using a hierarchical model for between-study heterogeneity. Five studies were included that provided age stratification. The estimated OR for multiple intracranial aneurysms per year was 1.011 (95% CI 1.005–1.018). Four follow-up studies were available.
Conclusions
According to the three different approaches (study-level, patient-level, and follow-up analyses), the estimated annual rates of development of de novo aneurysms were 1.62% (95% CI 0.28–3.59%), 0.28% (95% CI 0.12–0.49%), and 0.92% (95% CI 0.64–1.25%), respectively. The estimated annual rate of development of second de novo aneurysms ranged from 0.28 to 1.62%.
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Affiliation(s)
- James Ju Yong Cheong
- Department of Neurosurgery, South Western Sydney Area Health Service, University of New South Wales, Sydney, Australia
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Sandalcioglu IE, Schoch B, Regel JP, Wanke I, Gasser T, Forsting M, Stolke D, Wiedemayer H. Does intraoperative aneurysm rupture influence outcome? Analysis of 169 patients. Clin Neurol Neurosurg 2004; 106:88-92. [PMID: 15003296 DOI: 10.1016/j.clineuro.2003.10.011] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Revised: 10/07/2003] [Accepted: 10/21/2003] [Indexed: 11/29/2022]
Abstract
OBJECTIVES The aim of this study was to evaluate the prognostic value of intraoperative aneurysm rupture (IAR) in patients with subarachnoid hemorrhage (SAH) undergoing surgery for cerebral aneurysms. PATIENTS AND METHODS Between July 1997 and April 2000, 292 consecutive patients were admitted to our institution with SAH due to ruptured intracranial aneurysms. Of these, 169 patients were treated surgically according to standard microsurgical procedures and were included in this study. Mean age was 47 years. Initial clinical state was graded according to the classification of Hunt and Hess (HH). Outcome was classified according to the Glasgow Outcome Scale as favorable (grades IV and V) and unfavorable (grades I-III). Outcome of patients with intraoperative ruptured and non-ruptured aneurysms was analyzed in correlation to the preoperative clinical state and with respect to the time of surgery and to aneurysm localization. RESULTS Different rupture rates were observed with respect to the localization of the aneurysm: anterior circulation (n=69) 39.1%, middle cerebral artery (n=46) 34.8%, internal carotid artery (n=48) 31.2%, and posterior circulation (n=6) 16.7%. Patients with HH-grades I-III showed a favorable outcome in 72.2% (61 of 84 patients) without intraoperative rupture and in 71.7% (33 of 46 patients) with intraoperative aneurysm rupture. The corresponding values for patients with HH-grades IV/V were: favorable outcome in 34.6% (9 of 26 patients) and 23.1% (3 of 13 patients), respectively. Poor initial clinical condition (HH IV and V) as well as the initial Fisher grades III and IV were strongly associated with poor clinical outcome. CONCLUSIONS Intraoperative aneurysm rupture has no impact on the outcome, neither in patients with good initial condition nor for poor grades patients.
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Affiliation(s)
- I E Sandalcioglu
- Department of Neurosurgery , University of Essen Medical School, Hufelandstr. 55, D-45122, Essen, Germany.
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Satzger W, Niedermeier N, Schönberger J, Engel RR, Beck OJ. Timing of operation for ruptured cerebral aneurysm and long-term recovery of cognitive functions. Acta Neurochir (Wien) 1995; 136:168-74. [PMID: 8748849 DOI: 10.1007/bf01410621] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Advantage and disadvantages of early and late operation for ruptured cerebral aneurysm are controversially evaluated with regard to peri-operative operation outcome and long-term cognitive recovery. In this retrospective analysis 22 patients with early surgery (ES) within three days after subarachnoid haemorrhage (SAH) and 22 patients with late surgery (LS) at least 14 days after SAH were studied. Patients were pair-wise matched by degree of SAH localisation of aneurysm and age at SAH. On average three years after SAH both groups were examined individually with a comprehensive neuropsychological test battery including tests of premorbid intelligence, concept formation, memory, visuomotor speed, aphasia screening, and mood. ES and LS patients were well comparable in terms of years of education and level of premorbid intelligence. There was a clear influence of patients age on fluid intelligence tests, indicating a general change-sensitivity of tests. No influence of degree of SAH and localisation of aneurysm could be detected. There were also no differences between ES and LS patients in neuropsychological tests sensitive to brain damage, suggesting that the decision for early or late surgery for ruptured cerebral aneurysm can be based upon surgical reasons at the time of the SAH.
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Affiliation(s)
- W Satzger
- Department of Psychiatry, University of Munich, Federal Republic of Germany
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Rinne J, Hernesniemi J, Puranen M, Saari T. Multiple intracranial aneurysms in a defined population: prospective angiographic and clinical study. Neurosurgery 1994; 35:803-8. [PMID: 7838326 DOI: 10.1227/00006123-199411000-00001] [Citation(s) in RCA: 126] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
Abstract
Multiple intracranial aneurysms (MIA) have been detected in up to one-third of patients with cerebral aneurysms. Three main external factors influence these figures as follows: the quality of angiographies, the quantity of vessels studied, and referral policy. In a 1-year prospective study, we determined the incidence of MIA in a defined catchment area in East Finland by investigating all of the patients with intracranial aneurysms with panangiography. In 114 unselected patients, a total of 170 intracranial aneurysms were detected, and, of these, 39 (34%) harbored MIA. In contrast to most other reports, there was a male predominance in patients with MIA, and half of these men had hypertension. Intracavernous carotid and pericallosal aneurysms were more frequent in patients with MIA. The number of asymptomatic vertebrobasilar aneurysms was extremely low, and most of the nonruptured aneurysms were found in bilateral carotid angiograms. In spite of the active search, the proportion of vertebrobasilar aneurysms remained at 6%. Although our surgical policy was most active, one-third of the asymptomatic aneurysms remained untreated, mainly because of the poor condition of the patient.
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Affiliation(s)
- J Rinne
- Department of Neurosurgery, University Hospital of Kuopio, Finland
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Thomeer RT, Taal JC, Voormolen JH, Wintzen AR. Aneurysmal bleeding. A plea for early surgery in good-risk patients. Acta Neurochir (Wien) 1994; 128:126-31. [PMID: 7847128 DOI: 10.1007/bf01400662] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
From 1985 onwards we have aimed at operating on good-risk patients, i.e., those graded I-III on the WFNS SAH Scale, within 3 days after the aneurysmal bleed. We report on a series of 100 consecutive operations for saccular aneurysm, covering a period of 5 1/2 years. Early operations (in the above sense) were done in 57 good-risk but otherwise unselected patients. After a one year follow-up, 47 of them (82%) were found to have made a good recovery (Glasgow Outcome Score I). The outcome of (mostly early) surgery in 15 selected poor-risk patients (WFNS SAH Scale IV and V) was much less favourable. Late surgery (4 or more days after SAH) was performed in 28 good-risk patients, most of whom had been admitted several days or weeks after the bleeding. Almost all of these patients had a good outcome. It is argued that the known management results of delayed surgery, which during the deliberately chosen interval exposes the patient to the risk of rebleeding and vasospasm, have by now been surpassed by those of early surgery. However excellent the surgical results of delayed operations may be, early operation should become the treatment of choice in good-risk patients.
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Affiliation(s)
- R T Thomeer
- Department of Neurosurgery, Leiden University Hospital, The Netherlands
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Bailes JE, Spetzler RF, Hadley MN, Baldwin HZ. Management morbidity and mortality of poor-grade aneurysm patients. J Neurosurg 1990; 72:559-66. [PMID: 2319314 DOI: 10.3171/jns.1990.72.4.0559] [Citation(s) in RCA: 221] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Preliminary experience with the occasional good survival of patients in Hunt and Hess Grade IV or V with aneurysmal subarachnoid hemorrhage (SAH) led to a prospective management protocol employed during a 2 1/2-year period. The protocol utilized computerized tomography (CT) scanning to diagnose SAH and to obtain evidence for irreversible brain destruction, consisting of massive cerebral infarction with midline shift or dominant basal ganglia or brain-stem hematoma. These patients, along with those who exhibited poor or absent intracranial filling on CT or angiography, were excluded from active treatment and given supportive care only. All other patients had immediate ventriculostomy placement and, if intracranial pressure (ICP) was controllable (less than or equal to 30 cm H2O without an intracranial clot or less than or equal to 50 cm H2O in the presence of a clot), went on to have craniotomy for aneurysm clipping. Aggressive postoperative hypertensive, hypervolemic, hemodilutional therapy was subsequently employed. Of 54 patients with poor-grade aneurysms, ventriculostomy was placed in 47 (87.0%) and yielded high ICP's in the overwhelming majority, with the mean ICP being 40.2 cm H2O. Nineteen poor-grade aneurysm patients received no surgical treatment and survived a mean of 31.8 hours with 100% mortality. Thirty-five patients underwent placement of a ventriculostomy, craniotomy for aneurysm clipping and intracranial clot evacuation, and postoperative hypertensive, hypervolemic, hemodilutional therapy. The outcome at 3 months of the 35 patients who were selected for active treatment was good in 19 (54.3%), fair in four (11.4%), poor in four (11.4%), and death in eight (22.9%). It is concluded that poor-grade aneurysm patients usually present with intracranial hypertension, even those without an intracranial clot. Based on radiographic rather than neurological criteria, a portion of these patients can be selected for active and successful treatment. Increased ICP can be present without ventriculomegaly, and immediate ventriculostomy should be performed. As long as ICP is controllable, craniotomy and postoperative intensive care can effect a favorable outcome in a significant percentage of these patients.
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Affiliation(s)
- J E Bailes
- Barrow Neurological Institute, Phoenix, Arizona
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Seifert V, Trost HA, Stolke D. Management morbidity and mortality in grade IV and V patients with aneurysmal subarachnoid haemorrhage. Acta Neurochir (Wien) 1990; 103:5-10. [PMID: 2360467 DOI: 10.1007/bf01420185] [Citation(s) in RCA: 55] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
In a retrospective study the clinical management of 74 patients with aneurysmal subarachnoid haemorrhage (SAH) admitted in grade IV and V Hunt and Hess was examined. 39 patients (53%) were admitted within 24 hours after SAH, 29 patients (39%) between 24 and 72 hours after SAH, and 6 patients 8%) later than this time interval. The ruptured aneurysms were located at the anterior communicating artery complex in 34 patients (46%), on the middle cerebral artery in 19 patients (26%), on the internal carotid artery in 12 patients (16%) and at the vertebro-basilar artery complex in 9 patients (12%). In 38 patients (51%) no surgical attack on the aneurysm was performed. 19 (50%) of these patients were in grade IV on admission and 19 (50%) in grade V. In 36 patients (49%) the aneurysm was clipped. Of these patients 29 (81%) were in grade IV and 7 (19%) in grade V. Of the 38 patients in whom no aneurysm surgery was done, 37 patients died, representing a mortality rate of 97%, one patient survived in grade III Glasgow Outcome Scale (GOS). Concerning the outcome in those patients with aneurysm clipping, of 19 patients in grade IV operated on early, 10 patients (53%) made a good recovery, 3 (16%) were left severely disabled and 6 patients (31%) remained in a vegetative state or died. Of the 10 patients in grade IV with delayed surgery 4 (40%) were in grade I and II postoperatively, 2 (20%) in grade III, and again 4 (40%) in grade IV and V GOS.(ABSTRACT TRUNCATED AT 250 WORDS)
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Affiliation(s)
- V Seifert
- Neurosurgical Clinic, Medical School Hannover, Federal Republic of Germany
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Rickels E, Seifert V, Zumkeller M, Kunz U, Reale E. Corrugation of cerebral vessels following subarachnoid hemorrhage: comparison of two experimental models of chronic cerebral vasospasm. Exp Neurol 1990; 107:178-86. [PMID: 2303126 DOI: 10.1016/0014-4886(90)90156-m] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- E Rickels
- Neurosurgical Clinic, Medical School, Hannover, West Germany
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Incidence, Management, and Outcome of Patients with Premature Rupture of Cerebral Aneurysms During Surgery. ADVANCES IN NEUROSURGERY 1989. [DOI: 10.1007/978-3-642-74279-8_34] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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