Clinical trial NCT06715930: Nomogram for Predicting In-stent Stenosis After Pipeline Embolization Device Treatment in Patients with Intracranial Aneurysm
Official title: Nomogram for Predicting In-stent Stenosis After Pipeline Embolization Device Treatment in Patients with Intracranial Aneurysm: a Multicenter, Retrospective Model Development and Validation Study
Study type: OBSERVATIONAL
Overall status: ACTIVE_NOT_RECRUITING
Conditions: Intracranial Aneurysm
Keywords: Intracranial aneurysm
In-stent stenosis
Pipeline embolization device
Nomogram
Lead sponsor: Beijing Tiantan Hospital
Sponsor class: OTHER
Collaborators: name: Beijing Chao Yang Hospital
name: Peking University International Hospital
First posted: 2024-12-04
Enrollment: 1500
Sex: ALL
Minimum age (years): 18
Maximum age (years): 75
Standard ages: ADULT
OLDER_ADULT
Accepts healthy volunteers: no
Observational model: COHORT
Time perspective: RETROSPECTIVE
Sampling method: NON_PROBABILITY_SAMPLE
Study population: Patients diagnosis of "unruptured intracranial aneurysm" treated with PEDs.

Brief summary: Intracranial aneurysms (IAs) are the primary cause of non-traumatic subarachnoid hemorrhage with high morbidity and mortality. Flow diverters, such as pipeline embolization devices (PEDs), are among the most effective methods for treating IAs in recent years due to the maturity of interventional devices and minimally invasive techniques. Unlike conventional stents, PEDs modify the hemodynamics within the parent artery and aneurysm sac, allowing blood flow from the aneurysm sac, thus facilitating endothelialization of the aneurysm neck. As a result, aneurysms are completely removed from circulation with time. However, about 5.1%-38.5% of IA patients develop in-stent stenosis (ISS) even after successful PED implantation. ISS increases the risk of retreatment and ischemic complications, thereby affecting the long-term prognosis of IA patients. Therefore, preoperative determination of the patient's suitability for PED implantation can enhance patient-centered decision-making and improve the long-term prognosis of IA patients.

Although previous studies have evaluated the correlation between certain individual variables and ISS, there are few comprehensive models predicting ISS after PED treatment. Nomograms have been widely used for prediction of tumor survival and cardiovascular events. Nomograms incorporate multiple risk factors for predicting the patient's potential prognosis based on their individual risks. This study aimed to identify the predictors for ISS after PED treatment and to create and verify a nomogram for assessing individual risk.


Eligibility criteria: Inclusion Criteria:

1. Patients aged18 to 75 years;
2. IAs patients treated with PEDs;
3. patients whose parent artery did not have significant atherosclerotic stenosis;
4. patients who had at least one digital subtraction angiography (DSA) follow-up.

Exclusion Criteria:

1. Patients missing critical clinical baseline;
2. patients with inadequate DSA image quality for reliable assessment;
3. patients with comorbid cerebrovascular conditions, including arteriovenous fistulas and arteriovenous malformations;
4. patients without any follow-up information.

Primary outcomes:
measure: In-stent stenosis
timeFrame: 6 months, 1 year, and 3 years after treatment.
Secondary outcomes:
measure: Complete occlusion at the last angiographic follow-up
timeFrame: 6 months, 1 year, and 3 years after treatment
measure: Procedure-related complications
timeFrame: 6 months, 1 year, and 3 years after treatment
Other outcomes:
Locations:
city: Beijing
country: China
facility: Beijing Tiantan Hospital
state: Beijing
Study officials:
References:
citation: Turhon M, Kang H, Liu J, Zhang Y, Zhang Y, Huang J, Wang K, Li M, Liu J, Zhang H, Li T, Song D, Zhao Y, Luo B, Maimaiti A, Aisha M, Wang Y, Feng W, Wang Y, Wan J, Mao G, Shi H, Yang X, Guan S. In-Stent Stenosis After Pipeline Embolization Device in Intracranial Aneurysms: Incidence, Predictors, and Clinical Outcomes. Neurosurgery. 2022 Dec 1;91(6):943-951. doi: 10.1227/neu.0000000000002142. Epub 2022 Sep 21.
citation: John S, Bain MD, Hui FK, Hussain MS, Masaryk TJ, Rasmussen PA, Toth G. Long-term Follow-up of In-stent Stenosis After Pipeline Flow Diversion Treatment of Intracranial Aneurysms. Neurosurgery. 2016 Jun;78(6):862-7. doi: 10.1227/NEU.0000000000001146.
citation: Wang T, Richard SA, Jiao H, Li J, Lin S, Zhang C, Wang C, Xie X, You C. Institutional experience of in-stent stenosis after pipeline flow diverter implantation: A retrospective analysis of 6 isolated cases out of 118 patients. Medicine (Baltimore). 2021 Mar 19;100(11):e25149. doi: 10.1097/MD.0000000000025149.
citation: Dong L, Wang C, Chen X, Li M, Li T, Liu H, Zhao Y, Duan R, Jin W, Zhang Y, Wang Y, Lv M. Predicting Persistent Aneurysm Filling After Pipeline Embolization Device Treatment in Patients with Intracranial Aneurysm: Development and External Validation of a Nomogram Model. Transl Stroke Res. 2025 Apr;16(2):392-402. doi: 10.1007/s12975-023-01222-9. Epub 2023 Dec 8.
citation: Kadirvel R, Ding YH, Dai D, Rezek I, Lewis DA, Kallmes DF. Cellular mechanisms of aneurysm occlusion after treatment with a flow diverter. Radiology. 2014 Feb;270(2):394-9. doi: 10.1148/radiol.13130796. Epub 2013 Oct 28.
citation: Kang H, Zhou Y, Luo B, Lv N, Zhang H, Li T, Song D, Zhao Y, Guan S, Maimaitili A, Wang Y, Feng W, Wang Y, Wan J, Mao G, Shi H, Yang X, Liu J. Pipeline Embolization Device for Intracranial Aneurysms in a Large Chinese Cohort: Complication Risk Factor Analysis. Neurotherapeutics. 2021 Apr;18(2):1198-1206. doi: 10.1007/s13311-020-00990-8. Epub 2021 Jan 14.
citation: Becske T, Kallmes DF, Saatci I, McDougall CG, Szikora I, Lanzino G, Moran CJ, Woo HH, Lopes DK, Berez AL, Cher DJ, Siddiqui AH, Levy EI, Albuquerque FC, Fiorella DJ, Berentei Z, Marosfoi M, Cekirge SH, Nelson PK. Pipeline for uncoilable or failed aneurysms: results from a multicenter clinical trial. Radiology. 2013 Jun;267(3):858-68. doi: 10.1148/radiol.13120099. Epub 2013 Feb 15.
citation: Hanel RA, Cortez GM, Lopes DK, Nelson PK, Siddiqui AH, Jabbour P, Mendes Pereira V, Istvan IS, Zaidat OO, Bettegowda C, Colby GP, Mokin M, Schirmer CM, Hellinger FR, Given C, Krings T, Taussky P, Toth G, Fraser JF, Chen M, Priest R, Kan P, Fiorella D, Frei D, Aagaard-Kienitz B, Diaz O, Malek AM, Cawley CM, Puri AS, Kallmes DF. Prospective study on embolization of intracranial aneurysms with the pipeline device (PREMIER study): 3-year results with the application of a flow diverter specific occlusion classification. J Neurointerv Surg. 2023 Mar;15(3):248-254. doi: 10.1136/neurintsurg-2021-018501. Epub 2022 Mar 15.
citation: Thompson BG, Brown RD Jr, Amin-Hanjani S, Broderick JP, Cockroft KM, Connolly ES Jr, Duckwiler GR, Harris CC, Howard VJ, Johnston SC, Meyers PM, Molyneux A, Ogilvy CS, Ringer AJ, Torner J; American Heart Association Stroke Council, Council on Cardiovascular and Stroke Nursing, and Council on Epidemiology and Prevention; American Heart Association; American Stroke Association. Guidelines for the Management of Patients With Unruptured Intracranial Aneurysms: A Guideline for Healthcare Professionals From the American Heart Association/American Stroke Association. Stroke. 2015 Aug;46(8):2368-400. doi: 10.1161/STR.0000000000000070. Epub 2015 Jun 18.
citation: Liu Q, Li K, He H, Miao Z, Cui H, Wu J, Ding S, Wen Z, Chen J, Lu X, Li J, Zheng L, Wang S. The markers and risk stratification model of intracranial aneurysm instability in a large Chinese cohort. Sci Bull (Beijing). 2023 Jun 15;68(11):1162-1175. doi: 10.1016/j.scib.2023.05.001. Epub 2023 May 10.