Acta Neurochirurgica最新文献

Objective

Posterior fossa decompression for Chiari malformation type I (Chiari 1) is effective and associated with a low risk of complication. However, up to 20% of patients may experience continued deficits or recurring symptoms after surgical intervention. For pediatric patients, there are no established tools to predict outcomes, and the risk factors for unfavorable postoperative outcomes are poorly understood. Hence, our aim was to investigate baseline data and early postoperative predictors of poor outcomes as determined by the Chicago Chiari outcome scale (CCOS).

Methods

All pediatric patients (< 18 years) receiving a posterior fossa decompression for Chiari 1 between the years of 2005 and 2020 at the study center were eligible for inclusion. Patients with congenital anomalies were excluded.

Results

Seventy-one pediatric patients with a median age of 9 years were included. Most patients (58%) were females. Chiari 1 was associated with syringomyelia (51%), scoliosis (37%), and hydrocephalus (7%). Perioperative complications occurred in 13 patients (18%) of which two required additional procedures under general anesthesia. On multivariable proportional odds logistic regression, motor deficits (OR: 0.09; CI95%: [0.01–0.62]; p = 0.015), and surgical complications (OR: 0.16; CI95%: [0.41–0.66]; p = 0.011) were significant predictors of worse outcomes. The presence of syringomyelia was identified as a predictor of better outcomes (OR: 4.42 CI95% [1.02–19.35]; p = 0.048). A persistent hydrocephalus during the early postoperative period after posterior fossa decompression was a strong predictor of worse long-term CCOS (OR: 0.026; CI95%: [0.002–0.328]; p = 0.005).

Conclusion

Results from this study indicate that the existence of motor deficits and syringomyelia prior to surgery, and surgical complications and persistent hydrocephalus despite posterior fossa decompression, were useful predictors of long-term outcome.

Background

The sacroiliac joint (SIJ) is a common source of chronic low back pain. Published cohorts have reported favorable outcomes after SIJ fusion. We report the 12-month follow-up from SIJ fusion of the so far largest single-center and single-surgeon group.

Methods

Over 15,000 outpatients were evaluated for chronic low back and leg pain, of whom 3,477 underwent SIJ blocks. 541 patients were stringently selected to undergo SIJ fusion with triangular titanium implants (TTI). 483 patients had a follow-up of 12 months. Patients were seen every 3 months and completed visual analog scale (VAS) and Oswestry Disability Index (ODI) ratings.

Results

Mean age of all patients was 61 years, and the majority (65%) were women. 44% had undergone prior lumbar fusion and 10% had a spinal cord stimulator (SCS) in place at the time of SIJ surgery. 26% underwent non-simultaneous bilateral SI joint fusion. At 12 months, the proportion of patients with clinically important improvements in pain (≥ 2 points) was very high (100%). The proportion with substantial improvement (≥ 4 points) was 98%. Similarly, improvement in ODI was high, with nearly 99% having an improvement of ≥ 15 points by month 12. The proportions of patients with VAS ≤ 2 or ODI ≤ 15 was also high (92.8% and 48.9%).

Conclusions

In our clinical practice, SIJ fusion with TTI produces significant improvement in pain and disability. The most important factor for achieving these clinical results may be the very stringent multistep selection of patients for surgery, which is described in detail, as well as the highly standardized and streamlined surgical procedure and the particular postoperative management.

Background and Purpose

We report on an intensive two-day training program on microanastomoses performed on perfused human placenta models. A specific scoring system was elaborated to evaluate the participants’ microsurgical skills and report the participants’ results.

Materials and Methods

Trainees who attended the Zurich Microsurgery Courses in 2023 were included in the study. Before performing the microanastomoses, each participant received a visual didactic training. Training was made on perfused human placenta models. To perform the microvascular anastomoses, vessels of different diameters were chosen, and 9–0 and 10–0 microsutures were used. The course was structured in two days. On day one, participants practiced microvascular dissection, microsuturing and end-to-end anastomoses, while the second day was dedicated to end-to-side and to repeat the most useful microanastomosis depending on the specialty. A score system for the evaluation of a successful microanastomosis was developed and applied to assess the participants’ anastomoses. User satisfaction was measured by means of a survey-based questionnaire.

Results

Fifty-two participants from different institutions, specializations and levels of experience were included. A significant improvement in the overall microsurgical skills of the included cohort was documented (p < 0.005). The initial average score per anastomosis of 3.56 points (SD 0.71) increased to an average of 3.8 points (SD 0.87) at the end of the course. The steepest learning curve was observed in the placement of knots (Δ 0.48 points, p = 0.003) and microvascular dissection (Δ 0.44 points, p = 0.002). Most participants rated the fidelity and importance of the placental microsuturing course as extremely high.

Conclusion

The two-day training program is efficient to teach microvascular dissection and microanastomosis techniques. A significant improvement of participants’ microsurgical skills was reported. The human placenta model proved to be a high-fidelity simulator with great user satisfaction.

Purpose

Pituitary adenomas are amongst the most common benign central nervous system tumors, and often require resection via an endoscopic endonasal approach (EEA). Two of the most common associated complications are central diabetes insipidus (DI) and syndrome of inappropriate antidiuretic hormone secretion (SIADH). Both are thought to be caused by manipulation of the posterior pituitary gland (PPG), making intraoperative visualization and preservation of this structure critical. Intraoperative endoscopic endonasal ultrasound (IEUS) may present an optimal tool for this purpose. This study aims to describe the appearance and morphology of the PPG on IEUS.

Methods

This study included all pituitary adenoma surgeries during which IEUS was utilized and the PPG was visualized between 1/1/2022, and 12/31/2023. Demographic, clinical, pathological, and radiological data were retrospectively collected. The PPG was described as either hypoechoic, isoechoic, or hyperechoic as compared to the anterior pituitary gland and adenoma, and the morphology of the PPG was further classified as ellipse or crescent shaped.

Results

The PPG was hypoechoic in all 43 cases included in our final cohort (100.0%). Morphologically, the PPG appeared elliptical in 27 cases (62.8%), and crescent shaped in 16 cases (37.2%).

Conclusion

The PPG can typically be visualized by IEUS as a hypoechoic structure immediately anterior to the posterior wall of the sella turcica, with elliptical morphology being the most common appearance. These characteristics can be used by the skull base surgeon to more confidently identify the position and morphology of the PPG intraoperatively for its’ preservation.

Introduction

Unilateral biportal endoscopy (UBE) is a minimally invasive surgical (MIS) technique utilized for lumbar decompression, which has recently gained popularity in Europe. We aimed to explore the value of sequential adaptive e-learning, followed by simulator-based hands-on training modules for UBE at the occasion of the 2024 EANS Young Neurosurgeons meeting.

Materials and methods

An adaptive e-learning was designed by learning engineers (Area 9 Lyceum), based on theoretical content provided by two endoscopic spine surgeons. A two-module simulator training, consisting of an insight-the-box model (basic tasks for eye-hand coordination), followed by a realistic lumbar spine model (execution of an endoscopic decompression) was developed. Course participants completed the e-learning before the hands-on training course. Course experience was evaluated through a standardized self-assessment questionnaire containing a 5-point Likert scale and a 10-point numeric rating scale.

Results

Eleven of eighteen (61%) participants with different levels of professional education (62.5% residents in 1^st -6^th year of training, 37.5% board-certified) completed both trainings. Thirteen participants (72%) had no prior experience with UBE. The perception of knowledge after the e-learning module increased from 2.5 (SD 2) to 6.5 (SD 1.8; p = 0.039). The usefulness, enjoyment, and efficiency of the courses averaged a score of 8.0 (SD 1.8). Regarding the hands-on training, participants estimated an average increase in their skills from 2.9 (SD 1.8) to 6.8 (SD 2, p = 0.028). The overall rating of the two-module course was 7.9 (SD 2.2).

Discussion and conclusion

Sequential e-learning and simulator training appear to be an effective educational adjunct to establish novel, MIS-techniques such as UBE.

Objective

Carotid artery injury is a rare, but major complication of endonasal operations. The morbidity and mortality of such a complication can be mitigated by preparedness and a clear plan set in place to address the hemorrhage expeditiously. This study examines the implementation of such a carotid injury timeout checklist and demonstrates its effectiveness in a patient with possible arterial injury.

Methods

A carotid injury timeout checklist was implemented for high risk endonasal procedures. The case selection was left to the surgeon, with guidelines including prior surgery, prior radiation, invasive tumors, and certain pathologies such as meningioma or chordoma. Factors affecting implementation were analyzed including tumor characteristics and patient history.

Results

Over a 12-month period, 103 endonasal operations were performed since the carotid artery injury timeout checklist was implemented, with 21 (20.4%) having a carotid artery injury timeout performed. Tumor characteristics that were associated with performing this timeout included Knosp grade (for pituitary adenomas, p = 0.002), carotid artery encasement (p < 0.001), extended approach (p < 0.001), tumor size (p = 0.05) and diagnosis (p < 0.001). Re-operation and prior radiation were not factors for this cohort. The single carotid artery branch (hypertrophic vidian artery) injury that was sustained was easily and successfully managed, aided by preparation established via this protocol. The additional time necessary for this timeout to be performed was negligible with respect to the overall surgery length.

Conclusion

A carotid artery injury timeout can and should be successfully implemented for extended endonasal operations for pituitary and parasellar tumors with high risk factors including, but not limited to, carotid injury encasement, large tumor size and non-adenomatous diagnoses. A comprehensive plan for both intraoperative and perioperative management of the carotid injury is necessary to minimize the risk of morbidity and to deliver care expeditiously.

Background

Some patients suffering from thoracolumbar complete burst fracture causing neurological deficit may be eligible for single-stage posterior-only three column reconstruction with spine jack expansion kyphoplasty.

Method

Short segment monoaxial pedicle screws are placed. Spine jack working channels are positioned in the comminuted vertebral body. Then, the surgeon can perform jack expansion kyphoplasty and short-segment fixation and distraction in the order best suited, considering whether the collapsed vertebral body has been expanded thanks to hyperlordosis positioning. This strategy allows to regain both native vertebral body height and proper regional sagittal balance. Wide decompression with laminectomy and arthrectomy is necessary at the level of posterior wall recession.

Conclusion

Combination of short segment pedicle screw fixation with distraction and open spine jack kyphoplasty is technically feasible and avoids the need for corpectomy in complete burst fractures with neurological deficit.

Purpose

With the growing demand for shared decision-making and patient-centered care, optimal informed consent (IC) has gained relevance. Virtual reality (VR) has seen significant technological advancements, and its medical applications currently include surgical planning and medical education. This pilot study investigates the feasibility of VR-enhanced informed consent (VR-IC) in neurosurgery to improve preoperative IC and patient satisfaction.

Methods

We included patients aged 18 to 75 years who were scheduled for skull base meningioma or brain aneurysm surgery between May and December 2023. Exclusion criteria were visual/auditory impairments and severe cognitive/psychiatric disorders. Patients received standard IC followed by VR-IC using patient-specific VR models of their pathology. After an initial demonstration by the surgeon, the patients used the VR station independently. A questionnaire with 18 questions on a 5-point Likert scale assessed the subjective impression of VR-IC.

Results

Ten patients participated in the study, with six (60%) undergoing aneurysm clipping and four (40%) undergoing skull base meningioma resection. The mean age of the participants was 58 years (± 15, range 27 to 75 years), with four female patients (40%). Patients overall rated the VR-informed consent (VR-IC) positively with a mean of 4.22 (± 0.84). There was a better understanding of their pathology (mean 4.30 ± 0.92) and the planned procedure (mean 3.95 ± 1.04). Trust in the surgeon was rated with a mean of 3.47 (± 0.94). Only minimal side effects from the VR experience including dizziness or discomfort were noted (mean 4.60 ± 0.22). None of the participants dropped out of the study.

Conclusion

VR-enhanced informed consent is feasible and improves patient understanding and satisfaction without significant side effects. These findings will guide the planning of a randomized controlled trial to validate the benefits of VR-IC in neurosurgery further.

Background

Spontaneous intracerebral abscess formation is a rare condition presenting with a disabling sequela. The origin of infection can either be primary or secondary to an infection at another location. The site of primary infection - due to the proximity, often the oral cavity, the sinuses, and the orbit - determines the causative pathogens. Treatment often combines surgical and antimicrobial therapies. To determine the microbiology and respective changes and treatment outcome, we performed this retrospective monocentric cohort study of patients requiring surgical treatment of brain abscesses.

Methods

Patients undergoing surgical treatment of a primary intracranial abscess between January 2000 and January 2021 in the Department of Neurosurgery, Freiburg University Hospital were included. Demographic, clinical and imaging data were extracted from patients’ medical records and databases. Treatment approaches were also analyzed, and surgical therapy and antibiotic therapy were reported. Outcome was assessed by the modified Rankin score (mRS) and was dichotomized into good (mRS 0–3) and poor (mRS 4–6) outcome.

Results

We included 65 patients with spontaneous intracerebral abscess that were treated with neurosurgical intervention at our institution. Analysis of the causative pathogens showed an increasing dominance of rare pathogens such as fungi, parasites, mycobacteria and anaerobes. Outcome measured by the mRS was similar from 2005 to 2021.

Conclusions

The pathogen spectrum of spontaneous intracerebral abscess at our institution is shifting with rarer pathogens being increasingly detected. This retrospective analysis highlights the need for microbiological diagnosis and of combined surgical and antibiological treatment.

The utility of intraoperative mapping in multilingual patients with brain tumours in speech-eloquent locations is evidenced by reports of heterogeneity of the location and number of language areas. Furthermore, preserving the ability to switch between languages is crucial for multilingual patients’ communication and quality of life. We report the first case of intraoperative bilingual and language switching testing in a child undergoing awake craniotomy for a tumour within the left superior temporal gyrus using a novel test paradigm. Stimulation of the posterior superior temporal gyrus resulted in anomia when switching from Polish to English, in the absence of any stimulation effect on switching from English to Polish or object naming in each individual language.