Publications by authors named "Hani Marcus"

Purpose: Pituitary surgery is the mainstay treatment for most pituitary adenomas, but many questions remain about perioperative and long-term management and outcomes. This study aimed to identify the most pressing research priorities in pituitary surgery with input from patients, caregivers, and healthcare professionals.

Methods: An initial survey of patients, caregivers, and healthcare professionals assembled priorities related to preoperative care, surgical techniques, and postoperative management in pituitary surgery.

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Background: The use of simulation in neurosurgery is a widespread and popular means of training worldwide. However, little is known about patient and public acceptability of simulation in neurosurgical training and the potential consequences of this for future simulation development.

Methods: A two-stage questionnaire strategy was utilized, the first gathering insights from neurosurgical inpatients, and the second from the general public.

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Purpose: Prognostication of surgical complexity is crucial for optimizing decision-making and patient counseling in pituitary surgery. This study aimed to develop a clinical score to predict gross-total resection (GTR) in non-functioning pituitary adenomas (NFPAs) using externally validated machine-learning (ML) models.

Methods: Clinical and radiological data were collected from two tertiary medical centers.

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Improved surgical skill is generally associated with improved patient outcomes, although assessment is subjective, labour intensive, and requires domain-specific expertise. Automated data-driven metrics can alleviate these difficulties, as demonstrated by existing machine learning instrument tracking models. However, these models are tested on limited datasets of laparoscopic surgery, with a focus on isolated tasks and robotic surgery.

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Accurate intra-operative Remaining Surgery Duration (RSD) predictions allow for anaesthetists to more accurately decide when to administer anaesthetic agents and drugs, as well as to notify hospital staff to send in the next patient. Therefore, RSD plays an important role in improved patient care and minimising surgical theatre costs via efficient scheduling. In endoscopic pituitary surgery, it is uniquely challenging due to variable workflow sequences with a selection of optional steps contributing to high variability in surgery duration.

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Pituitary tumours are surrounded by critical neurovascular structures and identification of these intra-operatively can be challenging. We have previously developed an AI model capable of sellar anatomy segmentation. This study aims to apply this model, and explore the impact of AI-assistance on clinician anatomy recognition.

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Objective: This study aimed to compare the ability of a deep-learning platform (the MACSSwin-T model) with healthcare professionals in detecting cerebral aneurysms from operative videos. Secondly, we aimed to compare the neurosurgical team's ability to detect cerebral aneurysms with and without AI-assistance.

Background: Modern microscopic surgery enables the capture of operative video data on an unforeseen scale.

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Implanted cortical neuroprosthetics (ICNs) are medical devices developed to replace dysfunctional neural pathways by creating information exchange between the brain and a digital system which can facilitate interaction with the external world. Over the last decade, researchers have explored the application of ICNs for diverse conditions including blindness, aphasia, and paralysis. Both transcranial and endovascular approaches have been used to record neural activity in humans, and in a laboratory setting, high-performance decoding of the signals associated with speech intention has been demonstrated.

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 Despite advances in skull-base reconstruction techniques, cerebrospinal fluid (CSF) leaks remain a common complication following retrosigmoid (RS) vestibular schwannoma (VS) surgery. We aimed to review and classify the available strategies used to prevent CSF leaks following RS VS surgery.  A systematic review, including studies of adults undergoing RS VS surgery since 2000, was conducted.

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 Despite advances in skull base reconstruction techniques, cerebrospinal fluid (CSF) leaks remain a relatively common complication after translabyrinthine (TL) vestibular schwannoma (VS) surgery. We conducted a systematic review to synthesize the repair techniques and materials used in TL VS surgery to prevent CSF leaks.  A systematic review of studies published since 2000 reporting techniques to prevent CSF leaks during adult TL VS surgery was conducted.

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Article Synopsis
  • The study focused on developing a new risk tolerance tool to improve the surgical consent process, addressing the challenges faced by surgeons in understanding patients' values during busy clinical settings.
  • Patients expressed general satisfaction with the current consent process, but highlighted issues like it being impersonal and rushed, indicating a need for more individualized approaches.
  • The risk tool identified six key areas of risk and showed high patient acceptability, suggesting it could enhance the surgical consent experience by better reflecting individual patient concerns and preferences.*
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Study Design: A systematic review and meta-analysis of individual participant and aggregated data.

Objectives: To define the learning curves of endoscopic discectomies using unified statistical methodologies.

Methods: Searches returned 913 records, with 118 full-text articles screened.

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Background Context: The majority of surgical training is conducted in real-world operations. High-fidelity surgical simulators may provide a safer environment for surgical training. However, the extent that it reflects real-world operations and surgical ability is often poorly characterized.

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Background: Superior surgical skill improves surgical outcomes in endoscopic pituitary adenoma surgery. Video-based coaching programs, pioneered in professional sports, have shown promise in surgical training. In this study, we developed and assessed a video-based coaching program using artificial intelligence (AI) assistance.

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Background: Endoscopic pituitary adenoma surgery has a steep learning curve, with varying surgical techniques and outcomes across centers. In other surgeries, superior performance is linked with superior surgical outcomes. This study aimed to explore the prediction of patient-specific outcomes using surgical video analysis in pituitary surgery.

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Background: The introduction of the electronic health record (EHR) has improved the collection and storage of patient information, enhancing clinical communication and academic research. However, EHRs are limited by data quality and the time-consuming task of manual data extraction. This study aimed to use process mapping to help identify critical data entry points within the clinical pathway for patients with vestibular schwannoma (VS) ideal for structured data entry and automated data collection to improve patient care and research.

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Background: Artificial intelligence (AI) is expected to play a greater role in neurosurgery. There is a need for neurosurgeons capable of critically appraising AI literature to evaluate its implementation or communicate information to patients. However, there are a lack of courses delivered at a level appropriate for individuals to develop such skills.

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Purpose: This study investigates the potential utility of augmented reality (AR) in the endoscopic transsphenoidal approach (TSA). While previous research has addressed technical challenges in AR for TSA, this paper explores how design factors can improve AR for neurosurgeons from a human-centred design perspective.

Methods: Preliminary qualitative research involved observations of TSA procedures ( ) and semi-structured interviews with neurosurgeons ( ).

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Article Synopsis
  • The Expanded Endoscopic Endonasal Approach offers a minimally invasive way for neurosurgeons to access the skull base through the nostril, but current tools limit movement and control.
  • Researchers developed a handheld robotic system with detachable tools that improve flexibility and comfort for surgeons, featuring a joystick-like controller.
  • Experiments showed that the new robotic instruments enhance surgical dexterity and strength, proving to be feasible for clinical applications compared to traditional neurosurgical tools.
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Purpose: Accessible patient information sources are vital in educating patients about the benefits and risks of spinal surgery, which is crucial for obtaining informed consent. We aim to assess the effectiveness of a natural language processing (NLP) pipeline in recognizing surgical procedures from clinic letters and linking this with educational resources.

Methods: Retrospective examination of letters from patients seeking surgery for degenerative spinal disease at a single neurosurgical center.

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Objective: Develop a process map of when patients learn about their proposed surgery and what resources patients use to educate themselves.

Design: A mixed methods design, combining semistructured stakeholder interviews, quantitative validation using electronic healthcare records (EHR) in a retrospective cohort and a cross-sectional patient survey.

Setting: A single surgical centre in the UK.

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The convergence of digital pathology and artificial intelligence could assist histopathology image analysis by providing tools for rapid, automated morphological analysis. This systematic review explores the use of artificial intelligence for histopathological image analysis of digitised central nervous system (CNS) tumour slides. Comprehensive searches were conducted across EMBASE, Medline and the Cochrane Library up to June 2023 using relevant keywords.

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Article Synopsis
  • The study aimed to analyze survival outcomes in patients with skull base chordomas, emphasizing factors like surgical resection extent, type of surgery, tumor histology, and adjuvant therapies.
  • A systematic review and meta-analysis were conducted with 51 studies, involving 3,871 patients, to evaluate 5-year overall survival (OS) and progression-free survival (PFS) rates.
  • Results showed that gross-total resection significantly improved survival rates, and patients receiving proton beam radiotherapy had better outcomes compared to those receiving photon therapy or no treatment.
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