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Graffeo CS, Srinivasan VM, Scherschinski L, Benner D, Karahalios K, Devia DA, Catapano JS, Lawton MT. Expanding the reach of the trans-middle cerebellar peduncle approach: pontine cavernous malformations, tissue transgression beyond the safe entry zone, and the invisible triangle. J Neurosurg 2024; 140:1344-1356. [PMID: 37976511 DOI: 10.3171/2023.8.jns231684] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2023] [Accepted: 08/02/2023] [Indexed: 11/19/2023]
Abstract
OBJECTIVE In the authors' microsurgical experience, the trans-middle cerebellar peduncle (MCP) approach to the lateral and central pons has been the most common approach to brainstem cavernous malformations (BSCMs). This approach through a well-tolerated safe entry zone (SEZ) allows a wide vertical or posterior trajectory, reaching pontine lesions extending into the midbrain, medulla, and pontine tegmentum. Better understanding of the relationships among lesion location, surgical trajectory, and long-term clinical outcomes could determine areas of safe passage. METHODS A single-surgeon cohort study of all primary trans-MCP BSCM resections was conducted from July 1, 2017, to June 30, 2021. Preoperative and postoperative MR images were independently reviewed by 3 investigators blinded to the intervention, using a standardized rubric to define BSCM regions of interest (ROIs) involved with a lesion or microsurgical tract. Statistical testing, including the chi-square test with the Bonferroni correction, logistic regression, and structural equation modeling, was performed to analyze relationships between ROIs and clinical outcomes. RESULTS Thirty-one patients underwent primary trans-MCP BSCM resection during the study period. The median age was 50 years (IQR 24-49 years); 19 (61%) patients were female, and 12 (39%) were male. Seven (23%) patients had familial cavernous malformation syndromes. The median follow-up was 9 months (range 6-37 months). At the last follow-up, composite neurological outcomes were favorable: 22 (71%) patients had 0 (n = 12, 39%) or 1 (n = 10, 32%) major persistent deficit, 5 patients (16%) had 2 deficits, 2 (7%) had 3 deficits, and 1 patient each (3%) had 4 or 6 deficits. Unfavorable composite outcomes were significantly associated with lesions (OR 7.14, p = 0.04) or surgical tracts (OR 12.18, p < 0.001) extending from the superior cerebellar peduncle (SCP) into the contralateral medial midbrain. The ipsilateral dorsal pons was the most frequently implicated ROI involving a surgical tract and the development of new postoperative deficits. This region involved the rhomboid pontine territory and transgression of the pontine tegmentum (OR 7.53, p < 0.001). Structural equation modeling supported medial midbrain and pontine tegmentum transgression as the primary drivers of morbidity. CONCLUSIONS Trans-MCP resection is a safe and effective treatment for BSCMs, including lesions with marked superior or inferior ipsilateral extension. Two trajectories are associated with increased neurological risk: first, a superomedial trajectory to lesions extending into the midbrain that transgresses the SCP, its decussation, or both; and second, a posteromedial trajectory to lesions extending into the pontine tegmentum. The corticospinal tract, SCP, and pontine tegmentum form an invisible triangle within the pontine white matter tolerant of transgression. When the surgeon works within this triangle, most deep pontine BSCMs, including large lesions, those with contralateral or posterior extension, and others extending into the midbrain and medulla, can be resected safely with the trans-MCP approach.
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Vranic JE, Dmytriw AA, Berglar IK, Alotaibi NM, Cancelliere NM, Stapleton CJ, Rabinov JD, Harker P, Gupta R, Bernstock JD, Koch MJ, Raymond SB, Mascitelli JR, Patterson TT, Seinfeld J, White A, Case D, Roark C, Gandhi CD, Al-Mufti F, Cooper J, Matouk C, Sujijantarat N, Devia DA, Ocampo-Navia MI, Villamizar-Torres DE, Puentes JC, Salem MM, Baig A, El Namaani K, Kühn AL, Pukenas B, Jankowitz BT, Burkhardt JK, Siddiqui A, Jabbour P, Singh J, Puri AS, Regenhardt RW, Mendes Pereira V, Patel AB. The Impact of Preprocedural Platelet Function Testing on Periprocedural Complication Rates Associated With Pipeline Flow Diversion: An International Multicenter Study. Neurosurgery 2024:00006123-990000000-01127. [PMID: 38634693 DOI: 10.1227/neu.0000000000002956] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2023] [Accepted: 02/20/2024] [Indexed: 04/19/2024] Open
Abstract
BACKGROUND AND OBJECTIVES Dual antiplatelet therapy (DAPT) is necessary to minimize the risk of periprocedural thromboembolic complications associated with aneurysm embolization using pipeline embolization device (PED). We aimed to assess the impact of platelet function testing (PFT) on reducing periprocedural thromboembolic complications associated with PED flow diversion in patients receiving aspirin and clopidogrel. METHODS Patients with unruptured intracranial aneurysms requiring PED flow diversion were identified from 13 centers for retrospective evaluation. Clinical variables including the results of PFT before treatment, periprocedural DAPT regimen, and intracranial complications occurring within 72 h of embolization were identified. Complication rates were compared between PFT and non-PFT groups. Differences between groups were tested for statistical significance using the Wilcoxon rank sum, Fisher exact, or χ 2 tests. A P -value <.05 was statistically significant. RESULTS 580 patients underwent PED embolization with 262 patients dichotomized to the PFT group and 318 patients to the non-PFT group. 13.7% of PFT group patients were clopidogrel nonresponders requiring changes in their pre-embolization DAPT regimen. Five percentage of PFT group [2.8%, 8.5%] patients experienced thromboembolic complications vs 1.6% of patients in the non-PFT group [0.6%, 3.8%] ( P = .019). Two (15.4%) PFT group patients with thromboembolic complications experienced permanent neurological disability vs 4 (80%) non-PFT group patients. 3.7% of PFT group patients [1.5%, 8.2%] and 3.5% [1.8%, 6.3%] of non-PFT group patients experienced hemorrhagic intracranial complications ( P > .9). CONCLUSION Preprocedural PFT before PED treatment of intracranial aneurysms in patients premedicated with an aspirin and clopidogrel DAPT regimen may not be necessary to significantly reduce the risk of procedure-related intracranial complications.
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Affiliation(s)
- Justin E Vranic
- Neuroendovascular Program, Departments of Radiology, Neurosurgery and Neurology, Massachusetts General Hospital, Harvard Medical School, BostonMassachusetts , USA
| | - Adam A Dmytriw
- Neuroendovascular Program, Departments of Radiology, Neurosurgery and Neurology, Massachusetts General Hospital, Harvard Medical School, BostonMassachusetts , USA
- Neurovascular Centre, Departments of Medical Imaging & Neurosurgery, St. Michael's Hospital, University of Toronto, Toronto , Ontario , USA
| | - Inka K Berglar
- Neuroendovascular Program, Departments of Radiology, Neurosurgery and Neurology, Massachusetts General Hospital, Harvard Medical School, BostonMassachusetts , USA
| | - Naif M Alotaibi
- Department of Neurosurgery, National Neuroscience Institute, King Fahad Medical City, Riyadh , Saudi Arabia
| | - Nicole M Cancelliere
- Neurovascular Centre, Departments of Medical Imaging & Neurosurgery, St. Michael's Hospital, University of Toronto, Toronto , Ontario , USA
| | - Christopher J Stapleton
- Neuroendovascular Program, Departments of Radiology, Neurosurgery and Neurology, Massachusetts General Hospital, Harvard Medical School, BostonMassachusetts , USA
| | - James D Rabinov
- Neuroendovascular Program, Departments of Radiology, Neurosurgery and Neurology, Massachusetts General Hospital, Harvard Medical School, BostonMassachusetts , USA
| | - Pablo Harker
- Departments of Neurology and Rehabilitation Medicine, University of Cincinnati, Cincinnati , Ohio , USA
| | - Rajiv Gupta
- Neuroendovascular Program, Departments of Radiology, Neurosurgery and Neurology, Massachusetts General Hospital, Harvard Medical School, BostonMassachusetts , USA
| | - Joshua D Bernstock
- Neuroendovascular Program, Departments of Radiology, Neurosurgery and Neurology, Massachusetts General Hospital, Harvard Medical School, BostonMassachusetts , USA
| | - Matthew J Koch
- Department of Neurosurgery, University of Florida, Gainesville , Florida , USA
| | - Scott B Raymond
- Department of Radiology, University of Vermont Medical Center, Burlington , Vermont , USA
| | - Justin R Mascitelli
- Department of Neurosurgery, University of Texas Health Science Center at San Antonio, Long School of Medicine, San Antonio , Texas , USA
| | - T Tyler Patterson
- Department of Neurosurgery, University of Texas Health Science Center at San Antonio, Long School of Medicine, San Antonio , Texas , USA
| | - Joshua Seinfeld
- Department of Neurosurgery, University of Colorado, Denver , Colorado , USA
| | - Andrew White
- Department of Neurosurgery, University of Colorado, Denver , Colorado , USA
| | - David Case
- Department of Neurosurgery, University of Colorado, Denver , Colorado , USA
| | - Christopher Roark
- Department of Neurosurgery, University of Colorado, Denver , Colorado , USA
| | - Chirag D Gandhi
- Departments of Neurosurgery and Neurology, Westchester Medical Center, Valhalla , New York , USA
| | - Fawaz Al-Mufti
- Departments of Neurosurgery and Neurology, Westchester Medical Center, Valhalla , New York , USA
| | - Jared Cooper
- Departments of Neurosurgery and Neurology, Westchester Medical Center, Valhalla , New York , USA
| | - Charles Matouk
- Department of Neurosurgery, Yale School of Medicine, New Haven , Connecticut , USA
| | | | - Diego A Devia
- Departments of Radiology & Neurosurgery, Hospital Universitario San Ignacio, Bogotá , Colombia
| | - Maria I Ocampo-Navia
- Departments of Radiology & Neurosurgery, Hospital Universitario San Ignacio, Bogotá , Colombia
| | | | - Juan C Puentes
- Departments of Radiology & Neurosurgery, Hospital Universitario San Ignacio, Bogotá , Colombia
| | - Mohamed M Salem
- Department of Radiology & Neurosurgery, University of Pennsylvania School of Medicine, Pennsylvania , Pennsylvania , USA
| | - Ammad Baig
- Department of Neurosurgery, State University of New York at Buffalo, Buffalo , New York , USA
| | - Kareem El Namaani
- Department of Neurosurgery, Thomas Jefferson University, Philadelphia , Pennsylvania , USA
| | - Anna Luisa Kühn
- Department of Neurointerventional Radiology, UMass Memorial Hospital, Worcester , Massachusetts , USA
| | - Bryan Pukenas
- Department of Radiology & Neurosurgery, University of Pennsylvania School of Medicine, Pennsylvania , Pennsylvania , USA
| | - Brian T Jankowitz
- Department of Radiology & Neurosurgery, University of Pennsylvania School of Medicine, Pennsylvania , Pennsylvania , USA
| | - Jan Karl Burkhardt
- Department of Radiology & Neurosurgery, University of Pennsylvania School of Medicine, Pennsylvania , Pennsylvania , USA
| | - Adnan Siddiqui
- Department of Neurosurgery, State University of New York at Buffalo, Buffalo , New York , USA
| | - Pascal Jabbour
- Department of Neurosurgery, Thomas Jefferson University, Philadelphia , Pennsylvania , USA
| | - Jasmeet Singh
- Department of Neurointerventional Radiology, UMass Memorial Hospital, Worcester , Massachusetts , USA
| | - Ajit S Puri
- Department of Neurointerventional Radiology, UMass Memorial Hospital, Worcester , Massachusetts , USA
| | - Robert W Regenhardt
- Neuroendovascular Program, Departments of Radiology, Neurosurgery and Neurology, Massachusetts General Hospital, Harvard Medical School, BostonMassachusetts , USA
| | - Vitor Mendes Pereira
- Neurovascular Centre, Departments of Medical Imaging & Neurosurgery, St. Michael's Hospital, University of Toronto, Toronto , Ontario , USA
| | - Aman B Patel
- Neuroendovascular Program, Departments of Radiology, Neurosurgery and Neurology, Massachusetts General Hospital, Harvard Medical School, BostonMassachusetts , USA
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Vranic JE, Harker P, Stapleton CJ, Regenhardt RW, Dmytriw AA, Doron OM, Alotaibi NM, Leslie-Mazwi TM, Gupta R, Berglar IK, Tan CO, Koch MJ, Raymond SB, Mascitelli JR, Patterson TT, Seinfeld J, White A, Case D, Roark C, Gandhi CD, Al-Mufti F, Cooper J, Matouk C, Sujijantarat N, Devia DA, Ocampo-Navia MI, Villamizar-Torres DE, Puentes JC, Patel AB. The Impact of Dual Antiplatelet Therapy Duration on Unruptured Aneurysm Occlusion After Flow Diversion: A Multicenter Study. J Comput Assist Tomogr 2023; 47:753-758. [PMID: 37707405 DOI: 10.1097/rct.0000000000001457] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/04/2023]
Abstract
OBJECTIVE Endoluminal flow diversion reduces blood flow into intracranial aneurysms, promoting thrombosis. Postprocedural dual antiplatelet therapy (DAPT) is necessary for the prevention of thromboembolic complications. The purpose of this study is to therefore assess the impact that the type and duration of DAPT has on aneurysm occlusion rates and iatrogenic complications after flow diversion. METHODS A retrospective review of a multicenter aneurysm database was performed from 2012 to 2020 to identify unruptured intracranial aneurysms treated with single device flow diversion and ≥12-month follow-up. Clinical and radiologic data were analyzed with aneurysm occlusion as a function of DAPT duration serving as a primary outcome measure. RESULTS Two hundred five patients underwent flow diversion with a single pipeline embolization device with 12.7% of treated aneurysms remaining nonoccluded during the study period. There were no significant differences in aneurysm morphology or type of DAPT used between occluded and nonoccluded groups. Nonoccluded aneurysms received a longer mean duration of DAPT (9.4 vs 7.1 months, P = 0.016) with a significant effect of DAPT duration on the observed aneurysm occlusion rate (F(2, 202) = 4.2, P = 0.016). There was no significant difference in the rate of complications, including delayed ischemic strokes, observed between patients receiving short (≤6 months) and prolonged duration (>6 months) DAPT (7.9% vs 9.3%, P = 0.76). CONCLUSIONS After flow diversion, an abbreviated duration of DAPT lasting 6 months may be most appropriate before transitioning to low-dose aspirin monotherapy to promote timely aneurysm occlusion while minimizing thromboembolic complications.
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Affiliation(s)
| | - Pablo Harker
- Department of Neurology, University of Cincinnati Medical Center, Cincinnati, OH
| | - Christopher J Stapleton
- Department of Neurosurgery, Massachusetts General Hospital, Harvard Medical School, Boston, MA
| | - Robert W Regenhardt
- Department of Neurosurgery, Massachusetts General Hospital, Harvard Medical School, Boston, MA
| | | | - Omer M Doron
- Department of Neurosurgery, Massachusetts General Hospital, Harvard Medical School, Boston, MA
| | - Naif M Alotaibi
- Department of Neurosurgery, National Neuroscience Institute, King Fahad Medical City, Riyadh, Saudi Arabia
| | | | | | | | | | - Matthew J Koch
- Department of Neurosurgery, University of Florida, Gainesville, FL
| | - Scott B Raymond
- Department of Radiology, University of Vermont Medical Center, Burlington, VT
| | - Justin R Mascitelli
- Department of Neurosurgery, University of Texas Health Science Center at San Antonio, San Antonio, TX
| | - T Tyler Patterson
- Department of Neurosurgery, University of Texas Health Science Center at San Antonio, San Antonio, TX
| | - Joshua Seinfeld
- Department of Neurosurgery, University of Colorado, Denver, CO
| | - Andrew White
- Department of Neurosurgery, University of Colorado, Denver, CO
| | - David Case
- Department of Neurosurgery, University of Colorado, Denver, CO
| | | | | | | | | | - Charles Matouk
- Department of Neurosurgery, Yale School of Medicine, New Haven, CT
| | | | - Diego A Devia
- Department of Neurosurgery, Hospital Universitario San Ignacio, Pontificia Universidad Javeriana School of Medicine
| | - Maria I Ocampo-Navia
- Department of Neurosurgery, Hospital Universitario San Ignacio, Pontificia Universidad Javeriana School of Medicine
| | - Daniel E Villamizar-Torres
- Department of Neurosurgery, Hospital Universitario San Ignacio, Pontificia Universidad Javeriana School of Medicine
| | | | - Aman B Patel
- Department of Neurosurgery, Massachusetts General Hospital, Harvard Medical School, Boston, MA
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Graffeo CS, Scherschinski L, Benner D, Devia DA, Thomas G, Koester SW, Catapano JS, Winkler EA, Srinivasan VM, Lawton MT. Approach Selection Strategies for Repeat Resection of Brain Cavernous Malformations: Cohort Study. Oper Neurosurg (Hagerstown) 2023; 24:590-601. [PMID: 36867084 DOI: 10.1227/ons.0000000000000668] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2022] [Accepted: 12/19/2022] [Indexed: 03/04/2023] Open
Abstract
BACKGROUND Neurosurgical management of cerebral cavernous malformations (CMs) often benefits from using skull base approaches. Although many CMs are cured by resection, residual or recurrent disease may require repeat resection. OBJECTIVE To review approach selection strategies for reoperation of CMs to aid decision-making for repeat procedures. METHODS In this retrospective cohort study, a prospectively maintained single-surgeon registry was queried for patients with CMs who underwent repeat resection from January 1, 1997, to April 30, 2021. RESULTS Of 854 consecutive patients, 68 (8%) underwent 2 operations; 40 had accessible data on both. In most reoperations (33/40 [83%]), the index approach was repeated. In most reoperations using the index approach (29/33 [88%]), that approach was deemed ideal (no equivalent or superior alternative), whereas in some (4/33 [12%]), the alternative approach was deemed unsafe because of conformation of the tract. Among patients with reoperations using an alternative approach (7/40 [18%]), 2 with index transsylvian approaches underwent bifrontal transcallosal approaches, 2 with index presigmoid approaches underwent extended retrosigmoid revisions, and 3 with index supracerebellar-infratentorial approaches underwent alternative supracerebellar-infratentorial trajectory revisions. Among patients with reoperations with an alternative approach considered or selected (11/40 [28%]), 8 of 11 patients had a different surgeon for the index resection than for the repeat resection. The extended retrosigmoid-based approaches were used most often for reoperations. CONCLUSION Repeat resection of recurrent or residual CMs is a challenging neurosurgical niche at the intersection of cerebrovascular and skull base disciplines. Suboptimal index approaches may limit surgical options for repeat resection.
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Affiliation(s)
- Christopher S Graffeo
- Department of Neurosurgery, Barrow Neurological Institute, St. Joseph's Hospital and Medical Center, Phoenix, Arizona, USA
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Devia DA, Graffeo CS, Benner D, Scherschinski L, Thomas G, Koester SW, Srinivasan VM, Lawton MT. Experience and Balance: Long-Term Trends in Preferred Skull Base Approach for a Case Series of Cavernous Malformation Resections. Oper Neurosurg (Hagerstown) 2023:01787389-990000000-00684. [PMID: 37083737 DOI: 10.1227/ons.0000000000000718] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2022] [Accepted: 02/16/2023] [Indexed: 04/22/2023] Open
Abstract
BACKGROUND Skull base approaches are a foundation of modern cerebrovascular surgery; however, their application over time has varied. OBJECTIVE To assess trends in skull base approach selection for cavernous malformation (CM) resection. METHODS This is a retrospective case series of all first-time CM resections by a single surgeon from 1997 to 2021. Cases were classified by craniotomy and approach. Four sets of common comparator skull base approaches were identified by coauthor consensus: pterional and orbitozygomatic; retrosigmoid, extended retrosigmoid (xRS), and far-lateral; suboccipital and torcular; and trans-cerebellar peduncle (MCP) and transcerebellopontine angle. Counts were binned by 5-year or 10-year clusters for descriptive statistical assessment of temporal trends. RESULTS In total, 372 primary CM resections met the study criteria and were included. Orbitozygomatic approach use increased during the second 5-year period, after which the pterional approach rapidly became and remained the preferred approach. During the first two 5-year periods, the far-lateral approach was preferred to the retrosigmoid and xRS approaches, but the xRS approach grew in popularity and accounted for >50% of operations in this comparator group. Trans-MCP use compared with the transcerebellopontine angle approach closely mirrored the change in xRS use. The midline suboccipital approach accounted for a larger proportion (range, 62%-88%) of cases than the torcular approach (range, 12%-38%) across all periods. CONCLUSION The xRS and trans-MCP approaches have been increasingly used over time, while the orbitozygomatic and far-lateral approaches have become less common. These trends seem to reflect versatility, efficiency, and safety of these techniques.
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Affiliation(s)
- Diego A Devia
- Department of Neurosurgery, Barrow Neurological Institute, St. Joseph's Hospital and Medical Center, Phoenix, Arizona, USA
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Graffeo CS, Benner D, Devia DA, Cole TS, Lawton MT. Carotid Endarterectomy Requiring Intra-Arterial Shunting-A Technical Overview: 2-Dimensional Operative Video. Oper Neurosurg (Hagerstown) 2022; 23:e123-e124. [PMID: 35838468 DOI: 10.1227/ons.0000000000000235] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2021] [Accepted: 02/09/2022] [Indexed: 01/17/2023] Open
Affiliation(s)
- Christopher S Graffeo
- Department of Neurosurgery, Barrow Neurological Institute, St. Joseph's Hospital and Medical Center, Phoenix, Arizona, USA
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Graffeo CS, Devia DA, Benner D, Cole TS, Lawton MT. Torcular Craniotomy for Simultaneous Resection of a Tentorial Cerebellar Arteriovenous Malformation and Clipping of a Superior Cerebellar Artery Aneurysm: 2-Dimensional Operative Video. Oper Neurosurg (Hagerstown) 2022; 23:e65. [PMID: 35726945 DOI: 10.1227/ons.0000000000000213] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2021] [Accepted: 01/26/2022] [Indexed: 11/19/2022] Open
Affiliation(s)
- Christopher S Graffeo
- Department of Neurosurgery, Barrow Neurological Institute, St. Joseph's Hospital and Medical Center, Phoenix, Arizona, USA
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Vranic J, Harker P, Stapleton C, Regenhardt RW, Alotaibi N, Leslie-mazwi TM, Gupta R, Tan CO, Koch MJ, Dmytriw AA, Raymond SB, Mascitelli J, Patterson T, Seinfeld J, White A, Case D, Roark C, Gandhi CD, Al-Mufti F, Cooper J, Matouk C, Sujijantarat N, Devia DA, Villamizar-Torres DE, Ocampo-Navia MA, Puentes JC, Patel AB. Abstract WP11: The Impact Of Dual Antiplatelet Therapy Duration On Unruptured Aneurysm Occlusion Following Flow Diversion. Stroke 2022. [DOI: 10.1161/str.53.suppl_1.wp11] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Objective:
The objective of this study is to assess the impact that the type and duration of DAPT has on aneurysm occlusion rates and iatrogenic complications following endoluminal flow diversion with a single flow diverting stent.
Methods:
A retrospective review of a multicenter aneurysm database was performed from 2012 to 2020 to identify unruptured intracranial aneurysms treated with single device flow diversion and >12-month follow-up. Clinical and radiologic data were analyzed with aneurysm occlusion as a function of DAPT duration serving as a primary outcome measure.
Results:
A total of 205 patients underwent flow diversion with a single pipeline embolization device. During the study period, 12.7% of treated aneurysms remained non-occluded. There were no significant differences in aneurysm morphology or type of DAPT used between occluded and non-occluded groups. Non-occluded aneurysms received a longer mean duration of DAPT (9.4 vs 7.1 mo, p=0.016) with ANOVA demonstrating a significant effect of DAPT duration on the observed aneurysm occlusion rate (F(2, 202)=4.2, p=0.016). An exploratory analysis demonstrated the optimum DAPT discontinuation time to minimize aneurysm non-occlusion rates was 7.9 months (95% CI: 6-11 months). There was no significant difference in the rate of complications or delayed ischemic strokes observed between patients receiving short (<6 mo) and prolonged duration (>6 mo) DAPT (7.9% vs 9.3%, p=0.76).
Conclusions:
Following endovascular flow-diversion, an abbreviated duration of DAPT lasting 6 months may be most appropriate before transitioning to low-dose aspirin monotherapy to promote timely aneurysm occlusion while minimizing delayed thromboembolic complications.
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Affiliation(s)
- Justin Vranic
- Neurosurgery, Massachusetts General Hosp - Harvard Med Sch, Boston, MA
| | - Pablo Harker
- Neurosurgery, Massachusetts General Hosp - Harvard Med Sch, Boston, MA
| | | | | | - Naif Alotaibi
- Neurosurgery, Massachusetts General Hosp - Harvard Med Sch, Boston, MA
| | | | - Rajiv Gupta
- Radiology, Massachusetts General Hosp - Harvard Med Sch, Boston, MA
| | - Can Ozan Tan
- Massachusetts General Hosp - Harvard Med Sch, Boston, MA
| | - Matthew J Koch
- Neurosurgery, Massachusetts General Hosp - Harvard Med Sch, Boston, MA
| | - Adam A Dmytriw
- Massachusetts General Hosp - Harvard Med Sch, Boston, MA
| | | | | | | | | | | | | | | | | | | | - Jared Cooper
- Neurosurgery, Westchester Med Cntr, Valhalla, NY
| | | | | | - Diego A Devia
- Neurosurgery, Hosp Universitario San Ignacio - Pontificia Universidad Javeriana, Bogota, Colombia
| | | | - Maria A Ocampo-Navia
- Neurosurgery, Hosp Universitario San Ignacio - Pontificia Universidad Javeriana, Bogota, Colombia
| | - Juan C Puentes
- Hosp Universitario San Ignacio - Pontificia Universidad Javeriana, Bogota, Colombia
| | - Aman B Patel
- Massachusetts General Hosp - Harvard Med Sch, Boston, MA
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