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Maas DA, Manot-Saillet B, Bun P, Habermacher C, Poilbout C, Rusconi F, Angulo MC. Versatile and automated workflow for the analysis of oligodendroglial calcium signals. Cell Mol Life Sci 2024; 81:15. [PMID: 38194116 DOI: 10.1007/s00018-023-05065-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2023] [Revised: 11/20/2023] [Accepted: 11/27/2023] [Indexed: 01/10/2024]
Abstract
Although intracellular Ca2+ signals of oligodendroglia, the myelin-forming cells of the central nervous system, regulate vital cellular processes including myelination, few studies on oligodendroglia Ca2+ signal dynamics have been carried out and existing software solutions are not adapted to the analysis of the complex Ca2+ signal characteristics of these cells. Here, we provide a comprehensive solution to analyze oligodendroglia Ca2+ imaging data at the population and single-cell levels. We describe a new analytical pipeline containing two free, open source and cross-platform software programs, Occam and post-prOccam, that enable the fully automated analysis of one- and two-photon Ca2+ imaging datasets from oligodendroglia obtained by either ex vivo or in vivo Ca2+ imaging techniques. Easily configurable, our software solution is optimized to obtain unbiased results from large datasets acquired with different imaging techniques. Compared to other recent software, our solution proved to be fast, low memory demanding and faithful in the analysis of oligodendroglial Ca2+ signals in all tested imaging conditions. Our versatile and accessible Ca2+ imaging data analysis tool will facilitate the elucidation of Ca2+-mediated mechanisms in oligodendroglia. Its configurability should also ensure its suitability with new use cases such as other glial cell types or even cells outside the CNS.
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Affiliation(s)
- Dorien A Maas
- Université Paris Cité, Institute of Psychiatry and Neuroscience of Paris (IPNP), INSERM U1266, "Team: Interactions Between Neurons and Oligodendroglia in Myelination and Myelin Repair", 75014, Paris, France
| | - Blandine Manot-Saillet
- Université Paris Cité, Institute of Psychiatry and Neuroscience of Paris (IPNP), INSERM U1266, "Team: Interactions Between Neurons and Oligodendroglia in Myelination and Myelin Repair", 75014, Paris, France
| | - Philippe Bun
- Université Paris Cité, Institute of Psychiatry and Neuroscience of Paris (IPNP), INSERM U1266, "NeurImag Platform", 75014, Paris, France
| | - Chloé Habermacher
- Université Paris Cité, Institute of Psychiatry and Neuroscience of Paris (IPNP), INSERM U1266, "Team: Interactions Between Neurons and Oligodendroglia in Myelination and Myelin Repair", 75014, Paris, France
- SynapCell, Bâtiment Synergy Zac Isiparc, 38330, Saint Ismier, France
| | - Corinne Poilbout
- Université Paris Cité, Institute of Psychiatry and Neuroscience of Paris (IPNP), INSERM U1266, "Team: Interactions Between Neurons and Oligodendroglia in Myelination and Myelin Repair", 75014, Paris, France
| | - Filippo Rusconi
- IDEEV, GQE, Université Paris-Saclay, CNRS, INRAE, AgroParisTech, 12, Route 128, 91272, Gif-sur-Yvette, France
- Centre de Recherche des Cordeliers, Sorbonne Université, INSERM, Université Paris Cité, 75006, Paris, France
| | - Maria Cecilia Angulo
- Université Paris Cité, Institute of Psychiatry and Neuroscience of Paris (IPNP), INSERM U1266, "Team: Interactions Between Neurons and Oligodendroglia in Myelination and Myelin Repair", 75014, Paris, France.
- GHU PARIS Psychiatrie and Neurosciences, 75014, Paris, France.
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Liu M, Lu J, Zhi Y, Ruan Y, Cao G, Xu X, An X, Gao J, Li F. Microendoscopy in vivo for the pathological diagnosis of cervical precancerous lesions and early cervical cancer. Infect Agent Cancer 2023; 18:26. [PMID: 37101242 PMCID: PMC10134531 DOI: 10.1186/s13027-023-00498-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2022] [Accepted: 03/16/2023] [Indexed: 04/28/2023] Open
Abstract
BACKGROUND Cervical cancer is an important public health problem. Conventional colposcopy is inefficient in the diagnosis of cervical lesions and massive biopsies result in trauma. There is an urgent need for a new clinical strategy to triage women with abnormal cervical screening results immediately and effectively. In this study, the high-resolution microendoscopy combined with methylene blue cell staining technology was used to perform real-time in vivo imaging of the cervix for the first time. METHODS A total of 41 patients were enrolled in the study. All patients underwent routine colposcopy and cervical biopsy, and high-resolution images of methylene blue-stained cervical lesions were obtained in vivo using microendoscopy. The cell morphological features of benign and neoplastic cervical lesions stained with methylene blue under microendoscopy were analyzed and summarized. The microendoscopy and histopathology findings of the high-grade squamous intraepithelial lesion (HSIL) and more severe lesions were compared. RESULTS The overall consistency of microendoscopy diagnosis with pathological diagnosis was 95.12% (39/41). Diagnostic cell morphological features of cervicitis, low-grade squamous intraepithelial lesion (LSIL), HSIL, adenocarcinoma in situ, and invasive cancer were clearly demonstrated in methylene blue stained microendoscopic images. In HSIL and more severe lesions, microendoscopic methylene blue cell staining technology can show the microscopic diagnostic features consistent with histopathology. CONCLUSIONS This study was an initial exercise in the application of the microendoscopy imaging system combined with methylene blue cell staining technology to cervical precancerous lesions and cervical cancer screening. The results provided the basis for a novel clinical strategy for triage of women with abnormal cervical screening results using in vivo non-invasive optical diagnosis technology.
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Affiliation(s)
- Min Liu
- Department of Obstetrics and Gynecology, Shanghai East Hospital, School of Medicine, Tongji University, 150 Jimo Road, Shanghai, 200120, China
| | - Jianqiao Lu
- Department of Obstetrics and Gynecology, Shanghai East Hospital, School of Medicine, Tongji University, 150 Jimo Road, Shanghai, 200120, China
| | - Yong Zhi
- Department of Obstetrics and Gynecology, Shanghai East Hospital, School of Medicine, Tongji University, 150 Jimo Road, Shanghai, 200120, China
| | - Yetian Ruan
- Department of Obstetrics and Gynecology, Shanghai East Hospital, School of Medicine, Tongji University, 150 Jimo Road, Shanghai, 200120, China
| | - Guangxu Cao
- Department of Obstetrics and Gynecology, Shanghai East Hospital, School of Medicine, Tongji University, 150 Jimo Road, Shanghai, 200120, China
| | - Xinxin Xu
- Department of Obstetrics and Gynecology, Shanghai East Hospital, School of Medicine, Tongji University, 150 Jimo Road, Shanghai, 200120, China
| | - Xin An
- OptoMedic Technologies Inc., Foshan, 528200, China
| | - Jinli Gao
- Department of Pathology, Shanghai East Hospital, School of Medicine, Tongji University, Shanghai, 200120, China
| | - Fang Li
- Department of Obstetrics and Gynecology, Shanghai East Hospital, School of Medicine, Tongji University, 150 Jimo Road, Shanghai, 200120, China.
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Simpson AK, Lightsey HM, Xiong GX, Crawford AM, Minamide A, Schoenfeld AJ. Spinal endoscopy: evidence, techniques, global trends, and future projections. Spine J 2022; 22:64-74. [PMID: 34271213 DOI: 10.1016/j.spinee.2021.07.004] [Citation(s) in RCA: 27] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/09/2021] [Revised: 06/13/2021] [Accepted: 07/06/2021] [Indexed: 02/03/2023]
Abstract
The utilization of indirect visualization during procedures has been increasingly replacing traditional forms of direct visualization across many different surgical specialties. The adoption of arthroscopy, using small cameras placed inside joints, has transformed musculoskeletal care over the last several decades, allowing surgeons to provide the same anatomic solutions with less tissue dissection, resulting in lower requirements for inpatient care, reduced costs, and expedited recovery. For a variety of reasons, spine surgery has lagged behind other specialties in the adoption of indirect visualization. Nonetheless, patient demand for less invasive spine procedures and surgeon drive to provide these solutions and improve care quality has driven global adoption of spinal endoscopy. There are numerous endoscopic platforms and techniques currently utilized, and these systems are rapidly evolving. Additionally, the variance in technology and health system incentives across the globe has generated tremendous regional heterogeneity in the utilization of spinal endoscopic procedures. We present a consolidated review, including the background, evidence, techniques, and trends in spinal endoscopy, so that clinicians can gain a deeper understanding of this rapidly evolving domain of spinal healthcare.
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Affiliation(s)
- Andrew K Simpson
- Department of Orthopaedic Surgery, Brigham and Women's Hospital, Harvard Medical School, 75 Francis St, Boston, MA 02115; Microendoscopic Spine Institute, 75 Francis St, Boston, MA 02115.
| | - Harry M Lightsey
- Harvard Combined Orthopaedic Residency Program, Harvard Medical School, 55 Fruit St., Boston, MA, 02114
| | - Grace X Xiong
- Harvard Combined Orthopaedic Residency Program, Harvard Medical School, 55 Fruit St., Boston, MA, 02114
| | - Alexander M Crawford
- Harvard Combined Orthopaedic Residency Program, Harvard Medical School, 55 Fruit St., Boston, MA, 02114
| | - Akihito Minamide
- Spine Center, Department of Orthopaedic Surgery, Dokkyo Medical University Nikko Medical Center, 632 Takatoku, Nikko City, Tochigi, Japan
| | - Andrew J Schoenfeld
- Department of Orthopaedic Surgery, Brigham and Women's Hospital, Harvard Medical School, 75 Francis St, Boston, MA 02115
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Abstract
The utilization of indirect visualization during procedures has been increasingly replacing traditional forms of direct visualization across many different surgical specialties. The adoption of arthroscopy, using small cameras placed inside joints, has transformed musculoskeletal care over the last several decades, allowing surgeons to provide the same anatomic solutions with less tissue dissection, resulting in lower requirements for inpatient care, reduced costs, and expedited recovery. For a variety of reasons, spine surgery has lagged behind other specialties in the adoption of indirect visualization. Nonetheless, patient demand for less invasive spine procedures and surgeon drive to provide these solutions and improve care quality has driven global adoption of spinal endoscopy. There are numerous endoscopic platforms and techniques currently utilized, and these systems are rapidly evolving. Additionally, the variance in technology and health system incentives across the globe has generated tremendous regional heterogeneity in the utilization of spinal endoscopic procedures. We present a consolidated review, including the background, evidence, techniques, and trends in spinal endoscopy, so that clinicians can gain a deeper understanding of this rapidly evolving domain of spinal healthcare.
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Affiliation(s)
- Andrew K Simpson
- Department of Orthopaedic Surgery, Brigham and Women's Hospital, Harvard Medical School, 75 Francis St, Boston, MA 02115; Microendoscopic Spine Institute, 75 Francis St, Boston, MA 02115.
| | - Harry M Lightsey
- Harvard Combined Orthopaedic Residency Program, Harvard Medical School, 55 Fruit St., Boston, MA, 02114
| | - Grace X Xiong
- Harvard Combined Orthopaedic Residency Program, Harvard Medical School, 55 Fruit St., Boston, MA, 02114
| | - Alexander M Crawford
- Harvard Combined Orthopaedic Residency Program, Harvard Medical School, 55 Fruit St., Boston, MA, 02114
| | - Akihito Minamide
- Spine Center, Department of Orthopaedic Surgery, Dokkyo Medical University Nikko Medical Center, 632 Takatoku, Nikko City, Tochigi, Japan
| | - Andrew J Schoenfeld
- Department of Orthopaedic Surgery, Brigham and Women's Hospital, Harvard Medical School, 75 Francis St, Boston, MA 02115
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Laing BT, Siemian JN, Sarsfield S, Aponte Y. Fluorescence microendoscopy for in vivo deep-brain imaging of neuronal circuits. J Neurosci Methods 2021; 348:109015. [PMID: 33259847 PMCID: PMC8745022 DOI: 10.1016/j.jneumeth.2020.109015] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2020] [Revised: 11/24/2020] [Accepted: 11/26/2020] [Indexed: 11/16/2022]
Abstract
Imaging neuronal activity in awake, behaving animals has become a groundbreaking method in neuroscience that has rapidly enhanced our understanding of how the brain works. In vivo microendoscopic imaging has enabled researchers to see inside the brains of experimental animals and thus has emerged as a technology fit to answer many experimental questions. By combining microendoscopy with cutting edge targeting strategies and sophisticated analysis tools, neuronal activity patterns that underlie changes in behavior and physiology can be identified. However, new users may find it challenging to understand the techniques and to leverage this technology to best suit their needs. Here we present a background and overview of the necessary components for performing in vivo optical calcium imaging and offer some detailed guidance for current recommended approaches.
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Affiliation(s)
- Brenton T Laing
- Neuronal Circuits and Behavior Unit, National Institute on Drug Abuse Intramural Research Program, National Institutes of Health, Baltimore, MD, 21224-6823, USA
| | - Justin N Siemian
- Neuronal Circuits and Behavior Unit, National Institute on Drug Abuse Intramural Research Program, National Institutes of Health, Baltimore, MD, 21224-6823, USA
| | - Sarah Sarsfield
- Neuronal Circuits and Behavior Unit, National Institute on Drug Abuse Intramural Research Program, National Institutes of Health, Baltimore, MD, 21224-6823, USA
| | - Yeka Aponte
- Neuronal Circuits and Behavior Unit, National Institute on Drug Abuse Intramural Research Program, National Institutes of Health, Baltimore, MD, 21224-6823, USA; The Solomon H. Snyder Department of Neuroscience, Johns Hopkins University School of Medicine, Baltimore, MD, 21205, USA.
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Guo J, Fu L, Zhao J, Lei L, Zhan Q, Liu M, Ruan Y, Li H, Xu J, Li N, Wang H, Zhu H, Han Z, Li F. The value of microendoscopy in the diagnosis of cervical precancerous lesions and cervical microinvasive carcinoma. Arch Gynecol Obstet 2020; 302:455-62. [PMID: 32504196 DOI: 10.1007/s00404-020-05565-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2020] [Accepted: 04/25/2020] [Indexed: 12/24/2022]
Abstract
PURPOSE Cervical cancer is still one of the main causes of death in females. Conventional diagnostic tools such as colposcopy are still unsatisfactory, so accurate diagnostic tools for cervical diseases are needed. Therefore, the purpose of this study was to perform a clinical study to evaluate the value of microendoscopic imaging systems in the diagnosis of cervical precancerous lesions and cervical microinvasive carcinoma (MIC). METHODS Totally 106 patients ranging in age from 23 to 67 years were recruited. All patients had abnormal thin-layer cytology (TCT) results (≥ low-grade squamous intraepithelial lesions) and high-risk human papillomavirus (HPV) positivity. Each patient was first subjected to ordinary colposcopy, followed by microendoscopy and biopsy. All results of the colposcopy and microendoscopy images were compared to the histopathological diagnosis. RESULTS Characteristics of pathological blood vessels were easily distinguished by microendoscopy compared with ordinary colposcopy. The diagnostic agreement rate of microendoscopy with the pathological diagnosis was higher (95.3%) than that of ordinary colposcopy (37.7%) (weighted kappa = 0.863, P < .01). When diagnosing HSIL and more advanced disease, the sensitivity, specificity, positive predictive value (PPV), negative predictive value (NPV), and accuracy of the microendoscopic diagnosis were significantly higher than those of ordinary colposcopy (97.6 and 38.1%), (95.5 and 63.6%), (98.8 and 80.0%), (91.3 and 21.2%) and (97.7 and 43.4%), respectively. CONCLUSION This study shows that microendoscopy has important value in the diagnosis of cervical lesions which can provide real-time diagnosis in vivo without staining, particularly for lesions that are not sensitive to acetic acid staining.
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Merter A, Karaeminogullari O, Shibayama M. Comparison of Radiation Exposure Among 3 Different Endoscopic Diskectomy Techniques for Lumbar Disk Herniation. World Neurosurg 2020; 139:e572-e579. [PMID: 32330613 DOI: 10.1016/j.wneu.2020.04.079] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2020] [Revised: 04/08/2020] [Accepted: 04/09/2020] [Indexed: 02/07/2023]
Abstract
BACKGROUND Lumbar disk herniation can be successfully treated by lumbar endoscopic spinal procedures. However, one of the most important disadvantages of the endoscopic methods used is radiation exposure. There are multiple endoscopic spinal procedures and this study aims to compare unilateral biportal endoscopic diskectomy (UBED), percutaneous endoscopic lumbar diskectomy (PELD), and microendoscopic diskectomy (MED) methods in terms of radiation exposure. METHODS A total of 75 people were included in this prospective and multicenter study. The demographic characteristics, operating times (minutes), levels of surgery, lumbar disk herniation types, radiation exposures (dose area product [DAP]), and fluoroscopy times (seconds) of the groups were compared. RESULTS Mean DAP values were 1.39 Gy·cm2 in the UBED group, 2.46 Gy·cm2 in the PELD group, and 1.01 Gy·cm2 in the MED group. The UBED group had no statistically significant difference with the MED and PELD groups in terms of DAP (P = 0.281 and P = 0.058, respectively), whereas the PELD group had statistically significantly higher DAP values than the MED group (P = 0.016). The maximum mean duration of fluoroscopy usage time was 34.9 seconds in the PELD group, 19.3 seconds in the UBED group, and 4.6 seconds in the MED group. The differences between the groups were significant (P ≤ 0.001). CONCLUSIONS The more the level of invasiveness is reduced in spinal surgery, the greater the exposure to radiation. In this study, the groups are listed as PELD > UBED > MED according to the duration and level of radiation exposure.
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Affiliation(s)
- Abdullah Merter
- Department of Orthopedics, Spine Section, School of Medicine, Ibn-i Sina Hospital, Ankara University, Ankara, Turkey.
| | - Oguz Karaeminogullari
- Department of Orthopedics, Spine Section, Bayindir Sogutozu Hospital, Ankara, Turkey
| | - Motohide Shibayama
- Department of Orthopedics, Spine Section, Aichi Spine Hospital, Aichi Prefecture, Japan
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Ajlan RS, Desai AA, Mainster MA. Endoscopic vitreoretinal surgery: principles, applications and new directions. Int J Retina Vitreous 2019; 5:15. [PMID: 31236288 PMCID: PMC6580629 DOI: 10.1186/s40942-019-0165-z] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2018] [Accepted: 04/30/2019] [Indexed: 12/30/2022] Open
Abstract
Purpose To analyze endoscopic vitreoretinal surgery principles, applications, challenges and potential technological advances. Background Microendoscopic imaging permits vitreoretinal surgery for tissues that are not visible using operating microscopy ophthalmoscopy. Evolving instrumentation may overcome some limitations of current endoscopic technology. Analysis Transfer of the fine detail in endoscopic vitreoretinal images to extraocular video cameras is constrained currently by the caliber limitations of intraocular probes in ophthalmic surgery. Gradient index and Hopkins rod lenses provide high resolution ophthalmoscopy but restrict surgical manipulation. Fiberoptic coherent image guides offer surgical maneuverability but reduce imaging resolution. Coaxial endoscopic illumination can highlight delicate vitreoretinal structures difficult to image in chandelier or endoilluminator diffuse, side-scattered lighting. Microendoscopy’s ultra-high magnification video monitor images can reveal microscopic tissue details blurred partly by ocular media aberrations in contemporary surgical microscope ophthalmoscopy, thereby providing a lower resolution, invasive alternative to confocal fundus imaging. Endoscopic surgery is particularly useful when ocular media opacities or small pupils restrict or prevent transpupillary ophthalmoscopy. It has a growing spectrum of surgical uses that include the management of proliferative vitreoretinopathy and epiretinal membranes as well as the implantation of posterior chamber intraocular lenses and electrode arrays for intraretinal stimulation in retinitis pigmentosa. Microendoscopy’s range of applications will continue to grow with technological developments that include video microchip sensors, stereoscopic visualization, chromovitrectomy, digital image enhancement and operating room heads-up displays. Conclusion Microendoscopy is a robust platform for vitreoretinal surgery. Continuing clinical and technological innovation will help integrate it into the modern ophthalmic operating room of interconnected surgical microscopy, microendoscopy, vitrectomy machine and heads-up display instrumentation.
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Affiliation(s)
- Radwan S Ajlan
- 1Department of Ophthalmology, University of Kansas School of Medicine, 7400 State Line Road, Prairie Village, KS 66208-3444 USA
| | - Aarsh A Desai
- 2School of Medicine, University of Missouri-Kansas City, Kansas City, MO USA
| | - Martin A Mainster
- 1Department of Ophthalmology, University of Kansas School of Medicine, 7400 State Line Road, Prairie Village, KS 66208-3444 USA
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Dhandapani S, Karthigeyan M. "Microendoscopic" versus "pure endoscopic" surgery for spinal intradural mass lesions: a comparative study and review. Spine J 2018; 18:1592-602. [PMID: 29452284 DOI: 10.1016/j.spinee.2018.02.002] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/09/2017] [Accepted: 02/05/2018] [Indexed: 02/07/2023]
Abstract
BACKGROUND CONTEXT Endoscopy is increasingly being used for minimal invasiveness and panoramic visualization, with unclear efficacy and safety among spinal intradural mass. OBJECTIVE The present study aims to compare microendoscopic and pure endoscopic surgery for spinal intradural lesions. MATERIALS AND METHODS Spinal intradural lesions operated using endoscopic or access ports were categorized into "microendoscopic" (predominant microscope use) or "pure endoscopic" (stand-alone endoscopy) surgery, and were studied with respect to clinico-radiological features, techniques, perioperative course, histopathology, clinical, and radiological outcome at minimum of 3 months. RESULTS Among 34 patients studied, the initial 15 had "microendoscopic" surgery, 16 had "pure-endoscopic" surgery, and 3 had "mixed" use. There were 18 nerve sheath tumors, 6 meningiomas, 6 cysts, 2 ependymomas, ranging in size from 1.5 to as large as 6.8 cm (21%≥4 cm), including 4 in craniovertebral junction (CVJ). Intermuscular or paraspinous approach was utilized, followed by small bony fenestration or interlaminar corridor. Even larger tumors could be excised using expandable ports or "sliding delivery" technique. Although visualization of sides and angles was better with endoscope, hemostasis and dural closure had steep learning curve, necessitating the use of microscope in the initial cases. Clinical improvement and radiological resolution could be achieved in all. There was no significant difference between the groups. The change in Nurick grade had significant correlation with only the dimension of lesion (p=.03) and preoperative grade (p=.05). CONCLUSIONS This is probably the first report of spinal endoscopy for intradural tumors in CVJ or as big as 7 cm. Endoscopy is effective and safe for even large tumors with better visualization of sides and angles, albeit with hemostasis and dural closure having initial learning curve. Wide heterogeneity of surgical terminologies in the literature on these procedures warrants consensus for uniform reporting.
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Hayashi K, Toyoda H, Terai H, Hoshino M, Suzuki A, Takahashi S, Tamai K, Ohyama S, Hori Y, Yabu A, Nakamura H. Comparison of minimally invasive decompression and combined minimally invasive decompression and fusion in patients with degenerative spondylolisthesis with instability. J Clin Neurosci 2018; 57:79-85. [PMID: 30154001 DOI: 10.1016/j.jocn.2018.08.032] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2018] [Accepted: 08/13/2018] [Indexed: 01/12/2023]
Abstract
Posterior lumbar interbody fusion with cortical bone trajectory (CBT-PLIF) is a form of minimally invasive decompression and fusion, whereas microendoscopic laminotomy (MEL) is a form of minimally invasive decompression surgery. No study has compared the clinical outcomes of the two methods for patients who have degenerative spondylolisthesis (DS) with instability. In this study, CBT-PLIF and MEL were both offered to 64 patients who met the inclusion criteria. Each patient then selected his or her preferred treatment. Twenty patients received CBT-PLIF. They were matched to 30 of the 44 patients receiving MEL based on age, sex, disease duration, and surgical levels. The 20 patients with CBT-PLIF formed the CBT group and the 30 matched patients with MEL formed the MEL group. At 2 years of follow-up, Japanese Orthopaedic Association scores improved to 72.6% and 70.5% in the CBT and MEL groups, respectively. The difference in scores was not statistically significant. Further, improvements in visual analogue scale scores for back and leg symptom did not differ significantly between the two groups. Regarding complications, 1 CBT-group patient (5%) had adjacent-segment degeneration and 7 MEL-group patients (23%) had same-segment degeneration. Three CBT-group patients (15%) and 5 MEL-group patients (16%) required reoperation within the follow-up period. In summary, among patients who had DS with instability, MEL and CBT-PLIF offered comparable clinical outcomes at 2 years of follow-up. Although the rate of segmental degeneration was relatively high in the MEL group, both groups had similar reoperation rates.
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Affiliation(s)
- Kazunori Hayashi
- Department of Orthopaedic Surgery, Osaka City University Graduate School of Medicine, Osaka, Japan
| | - Hiromitsu Toyoda
- Department of Orthopaedic Surgery, Osaka City University Graduate School of Medicine, Osaka, Japan.
| | - Hidetomi Terai
- Department of Orthopaedic Surgery, Osaka City University Graduate School of Medicine, Osaka, Japan
| | - Masatoshi Hoshino
- Department of Orthopaedic Surgery, Osaka City University Graduate School of Medicine, Osaka, Japan
| | - Akinobu Suzuki
- Department of Orthopaedic Surgery, Osaka City University Graduate School of Medicine, Osaka, Japan
| | - Shinji Takahashi
- Department of Orthopaedic Surgery, Osaka City University Graduate School of Medicine, Osaka, Japan
| | - Koji Tamai
- Department of Orthopaedic Surgery, Osaka City University Graduate School of Medicine, Osaka, Japan
| | - Shoichiro Ohyama
- Department of Orthopaedic Surgery, Osaka City University Graduate School of Medicine, Osaka, Japan
| | - Yusuke Hori
- Department of Orthopaedic Surgery, Osaka City University Graduate School of Medicine, Osaka, Japan
| | - Akito Yabu
- Department of Orthopaedic Surgery, Osaka City University Graduate School of Medicine, Osaka, Japan
| | - Hiroaki Nakamura
- Department of Orthopaedic Surgery, Osaka City University Graduate School of Medicine, Osaka, Japan
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Chen X, Sanchez GN, Schnitzer MJ, Delp SL. Changes in sarcomere lengths of the human vastus lateralis muscle with knee flexion measured using in vivo microendoscopy. J Biomech 2016; 49:2989-2994. [PMID: 27481293 DOI: 10.1016/j.jbiomech.2016.07.013] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2015] [Revised: 06/05/2016] [Accepted: 07/16/2016] [Indexed: 11/30/2022]
Abstract
Sarcomeres are the basic contractile units of muscle, and their lengths influence muscle force-generating capacity. Despite their importance, in vivo sarcomere lengths remain unknown for many human muscles. Second harmonic generation (SHG) microendoscopy is a minimally invasive technique for imaging sarcomeres in vivo and measuring their lengths. In this study, we used SHG microendoscopy to visualize sarcomeres of the human vastus lateralis, a large knee extensor muscle important for mobility, to examine how sarcomere lengths change with knee flexion and thus affect the muscle׳s force-generating capacity. We acquired in vivo sarcomere images of several muscle fibers of the resting vastus lateralis in six healthy individuals. Mean sarcomere lengths increased (p=0.031) from 2.84±0.16μm at 50° of knee flexion to 3.17±0.13μm at 110° of knee flexion. The standard deviation of sarcomere lengths among different fibers within a muscle was 0.21±0.09μm. Our results suggest that the sarcomeres of the resting vastus lateralis at 50° of knee flexion are near optimal length. At a knee flexion angle of 110° the resting sarcomeres of vastus lateralis are longer than optimal length. These results show a smaller sarcomere length change and greater conservation of force-generating capacity with knee flexion than estimated in previous studies.
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Affiliation(s)
- Xuefeng Chen
- Department of Mechanical Engineering, Stanford University, United States
| | - Gabriel N Sanchez
- Department of Mechanical Engineering, Stanford University, United States; Department of Bioengineering, Stanford University, United States
| | - Mark J Schnitzer
- Department of Biology, Stanford University, United States; Department of Applied Physics, Stanford University, United States; Howard Hughes Medical Institute, United States
| | - Scott L Delp
- Department of Mechanical Engineering, Stanford University, United States; Department of Bioengineering, Stanford University, United States.
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Louie JS, Richards-Kortum R, Anandasabapathy S. Applications and advancements in the use of high-resolution microendoscopy for detection of gastrointestinal neoplasia. Clin Gastroenterol Hepatol 2014; 12:1789-92. [PMID: 25108219 PMCID: PMC4250374 DOI: 10.1016/j.cgh.2014.08.004] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/04/2014] [Accepted: 08/04/2014] [Indexed: 02/07/2023]
Abstract
The high-resolution microendoscope (HRME) is a novel imaging modality that allows real-time epithelial imaging at subcellular resolution. Used in concert with any standard endoscope, this portable, low cost, "optical biopsy" technology has the ability to provide images of cellular morphology during a procedure. This technology has been the subject of a number of studies investigating its use in screening and surveillance of a range of gastrointestinal neoplasias, including esophageal adenocarcinoma, esophageal squamous cell cancer, colorectal neoplasia, and anal neoplasia. These studies have shown that HRME is a modality that consistently provides high specificity, negative predictive value, and accuracy across different diseases. In addition, they have illustrated that HRME users can be relatively easily trained in a short period of time, and that users have demonstrated solid inter-rater reliability. These features make HRME a potential complement to high-definition white-light imaging, narrow-band imaging, and other red flag technologies in facilitating real-time clinical diagnosis, endoscopic therapy, and margin determination. Further clinical validation is needed to determine whether this translates to reduced procedure times, pathology costs, and follow-up procedures. Finally, the HRME has a relatively simple design compared with other similar technologies, making it portable, simple to maintain, and low cost. This may allow the HRME device to function in both advanced care settings as well as in places with less resources and specialized support systems. As a whole, the HRME device has shown good performance along with low cost and portable construction, and its application in different conditions and settings has been promising.
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Shukla R, Abidi WM, Richards-Kortum R, Anandasabapathy S. Endoscopic imaging: How far are we from real-time histology? World J Gastrointest Endosc 2011; 3:183-94. [PMID: 22013499 PMCID: PMC3196726 DOI: 10.4253/wjge.v3.i10.183] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/28/2010] [Revised: 07/15/2011] [Accepted: 08/30/2011] [Indexed: 02/05/2023] Open
Abstract
Currently, in gastrointestinal endoscopy there is increasing interest in high resolution endoscopic technologies that can complement high-definition white light endoscopy by providing real-time subcellular imaging of the epithelial surface. These ‘optical biopsy’ technologies offer the potential to improve diagnostic accuracy and yield, while facilitating real-time decision-making. Although many endoscopic techniques have preliminarily shown high accuracy rates, these technologies are still evolving. This review will provide an overview of the most promising high-resolution imaging technologies, including high resolution microendoscopy, optical coherence tomography, endocytoscopy and confocal laser endoscopy. This review will also discuss the application and current limitations of these technologies for the early detection of neoplasia in Barrett’s esophagus, ulcerative colitis and colorectal cancer.
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Affiliation(s)
- Richa Shukla
- Richa Shukla, Wasif M Abidi, Sharmila Anandasabapathy, Department of Medicine, Mount Sinai School of Medicine, New York, NY 10029, United States
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