Publications by authors named "Hartl R"

Article Synopsis
  • * A total of 18 carbapenemase variants were identified, predominantly in ST131 clades A and C, with the most common variants being detected in 14 and 12 countries, respectively.
  • * The rise in isolates carrying these genes since 2021 highlights a significant public health threat posed by the high-risk ST131 lineage.
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  • A study investigated the effectiveness of a virtually delivered mind-body program called VDTQM, which combines tai chi, qigong, and meditation, in treating low back pain (LBP) among adults.
  • The study involved 350 participants, who were divided into a treatment group receiving 12 weeks of VDTQM classes and a waitlist control group, with outcomes measured primarily by pain-related disability and secondary factors like pain intensity and quality of life.
  • Results indicated that the treatment group experienced significant improvements in pain-related disability and other outcomes at various points after treatment, suggesting that VDTQM could be a beneficial option for managing LBP.
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  • Minimally invasive spine surgery (MISS) reduces tissue damage through small incisions and advanced techniques, leading to benefits like less blood loss and shorter hospital stays compared to traditional open surgery.
  • * A systematic review of literature from Jan 2013 to Mar 2024 analyzed complications related to MISS, finding that various complications (like nerve injuries and cerebrospinal fluid leaks) depend on the specific surgical approach (cervical, thoracic, or lumbar).
  • * Although MISS generally lowers the risk of anatomical disruption, certain complications can still occur; the use of intraoperative monitoring and advanced technology may reduce these risks further, establishing MISS as a safe alternative to open surgery.
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  • The study evaluated the Single-Step Pedicle Screw System (SSPSS), a method for placing screws in minimally invasive spine surgery, that does not use traditional tools like K-wires.
  • Researchers compared the planned screw paths with actual positions using CT scans after surgeries on patients who received lumbar interbody fusion.
  • Results showed 95% accuracy in screw placements with no complications, suggesting SSPSS is a reliable alternative for pedicle screw placement.
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Neurosurgeons require post-graduate training to deliver safe, effective, and evidence-based care; to continually improve and adapt their methods through assessing the effect of their care and patient outcomes; and to train the future neurosurgeons of tomorrow to surpass current standards of care. We describe methods used by global collaborations to address these training needs on a worldwide scale, their risks, and their perceived benefits.

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Global neurosurgery seeks to provide quality neurosurgical health care worldwide and faces challenges because of historical, socioeconomic, and political factors. To address the shortfall of essential neurosurgical procedures worldwide, dyads between established neurosurgical and developing centers have been established. Concerns have been raised about their effectiveness and ability to sustain capacity development.

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Background And Objectives: One of the major challenges in training neurosurgical and orthopedic residents the technique for minimally invasive transforaminal lumbar interbody fusion (MIS-TLIF) is the lack of visualization of surgical landmarks (pedicle, pars, lamina). This is due to the limited access to the bony spine through a tubular retractor, in addition to a smaller working corridor or patient-specific factors such as bony overgrowth, disk space collapse, and listhesis. These factors increase the possibility for surgical error and prolonged surgery time.

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Unlabelled: In spring 2022, an increase in metallo-β-lactamase-producing (MBL-Pa) infections was detected in a hospital in Upper Austria. To identify the source of infection and to stop further transmissions, an epidemiological outbreak investigation including whole-genome sequencing (WGS)-based typing was conducted. The final case definition included cases admitted to the hospital between 2020 and 2023 with an MBL-Pa in one of the three genomic clusters identified.

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Background Context: There is a paucity of women in the field of academic spine surgery. In 2022, 20% of orthopedic surgery residents and 24% of neurosurgery residents were women, the lowest and third lowest of all medical specialties respectively. There exists a significant discrepancy in the number of women employed as adult spine surgeons at academic hospitals.

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  • Mechanical augmentation is crucial for the success of tissue-engineered intervertebral discs, with traditional stiffer materials facing failure in challenging environments, prompting the investigation of FlexiFil, a flexible 3D printing filament for support structures.
  • An experimental study using a minipig model assessed the mechanical response and tissue hydration of TE-IVDs using FPLA and PLA support cages, showing that FPLA cages exhibited better deformation resistance and minimal damage compared to PLA.
  • Findings revealed that FPLA effectively maintained disc height and promoted hydrated tissue formation, indicating its potential as a promising bioresorbable material for improving tissue-engineered disc implants long-term.
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  • Traumatic spinal injury (TSI) presents a major health challenge globally, especially in low and middle-income nations like Tanzania where road traffic accidents (RTAs) are on the rise.
  • A study analyzed data from 626 patients to compare demographic and injury patterns between TSI caused by RTAs and non-RTA events, revealing that RTAs had fewer male patients and more cervical injuries.
  • Despite the differences in demographics, the study found no significant variations in treatment outcomes, underscoring the need for balanced resource distribution for spinal injury care.
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Neurosurgical services and educational processes in Sudan have been severely disrupted by the ongoing armed conflict. The destruction of neurosurgical infrastructure and the continuous exodus of trained neurosurgeons from an already strained system have intensified the humanitarian crisis. The situation is further compounded by several factors, including attacks on medical professionals, partial suspension of neurosurgical training program, loss of communication tools, shortages of essential instruments, and disruptions in partnerships with regional and international neurosurgical associations.

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  • * Researchers analyzed 275 isolates from various countries using genomic techniques and found three main groups along with a proposed modified taxonomy for the genus.
  • * The findings suggest significant genetic diversity among Morganella spp and highlight the importance of monitoring these pathogens' resistance mechanisms for better treatment options.
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Background: Failure to restore lordotic alignment is not an uncommon problem following minimally invasive transforaminal lumbar interbody fusion (MIS TLIF), even with expandable cages that increase disc height. This study aims to investigate the effect of the expandable cage that is specifically designed to expand both height and lordosis. We evaluated the outcomes of MIS TLIF in restoring immediate postoperative sagittal alignment by comparing two different types of expandable cages.

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Background: Head and neck squamous cell carcinomas (HNSCC) are highly heterogeneous tumors. In the harsh tumor microenvironment (TME), metabolic reprogramming and mitochondrial dysfunction may lead to immunosuppressive phenotypes. Aerobic glycolysis is needed for the activation of cytotoxic T-cells and the absence of glucose may hamper the full effector functions of cytotoxic T-cells.

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Background: Trauma to the thoracic, thoracolumbar (TL), and lumbar spine is common and can cause disability and neurological deficits. Using a cohort of patients suffering from thoracic, TL, and lumbar spine trauma in a tertiary hospital in East Africa, the current study sought to: (1) describe demographics and operative treatment patterns, (2) assess neurologic outcomes, and (3) report predictors associated with undergoing surgery, neurologic improvement, and mortality.

Methods: A retrospective cohort study of patient records from September 2016 to December 2020 was conducted at a prominent East Africa referral center.

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The realm of spine surgery is undergoing a transformative shift, thanks to the integration of image-guided navigation technology. This innovative system seamlessly blends real-time imaging data with precise location tracking. While the indispensable expertise of experienced spine surgeons remains irreplaceable, navigation systems bring a host of valuable advantages to the operating room.

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Nonpharmaceutical interventions (NPI) are an important tool for countering pandemics such as COVID-19. Some are cheap; others disrupt economic, educational, and social activity. The latter force governments to balance the health benefits of reduced infection and death against broader lockdown-induced societal costs.

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Background: Excess flexion or extension during occipitocervical fusion (OCF) can lead to postoperative complications, such as dysphagia, respiratory problems, line of sight issues, and neck pain, but posterior fossa decompression (PFD) and OCF require different positions that require intraoperative manipulation.

Objective: The objective of this study was to describe quantitative fluoroscopic morphometrics in Chiari malformation (CM) patients with symptoms of craniocervical instability (CCI) and demonstrate the intraoperative application of these measurements to achieve neutral craniocervical alignment while leveraging a single axis of motion with the Mayfield head clamp locking mechanism.

Methods: A retrospective cohort study of patients with CM 1 and 1.

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Background: Tissue-engineered intervertebral disc (TE-IVD) constructs are an attractive therapy for treating degenerative disc disease and have previously been investigated in vivo in both large and small animal models. The mechanical environment of the spine is notably challenging, in part due to its complex anatomy, and implants may require additional mechanical support to avoid failure in the early stages of implantation. As such, the design of suitable support implants requires rigorous validation.

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  • Unilateral laminotomy for bilateral decompression (ULBD) is a minimally invasive surgery that effectively relieves symptoms of lumbar spinal stenosis while minimizing risks like blood loss, muscle damage, and pain compared to traditional methods.
  • The study highlights a technique called slalom unilateral laminotomy for bilateral decompression with navigation, detailing ten steps to perform the surgery and reporting on a case series of seven patients who underwent the procedure.
  • Results showed significant pain reduction post-surgery, with average pain scores dropping from 4.71 to 1.50 for back pain and 4.33 to 1.21 for leg pain, indicating it is a safe and efficient option for treating multi-segmental lumbar spinal stenosis.
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Background: Spine surgery is a rapidly evolving specialty with a continuous need to learn new skills. In resource-limited settings such as Africa, the need for training is greater. The use of simulation-based training is important in different stages of skill acquisition, especially for high-stake procedures such as spine surgery.

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Introduction: Spinal implants play a vital role in healthcare delivery, and regulations are necessary to ensure their quality, approval, access, and use. In this article, we examine the current state of regulation and approval procedures for medical devices in low- and middle-income countries (LMICs), emphasizing the situation in Tanzania.

Areas Covered: We conducted a systematic literature search and interviewed a local spine implant representative to investigate the approval, availability, and access of surgical and spinal implants in LMICs, particularly in Africa.

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