1
|
von Doernberg MC, von Rechenberg B, Richter H. Retrospective evaluation of radiofrequency volumetric tissue reduction for hypertrophic turbinates in dogs with brachycephalic obstructive airway syndrome. PLoS One 2024; 19:e0306391. [PMID: 38950052 PMCID: PMC11216595 DOI: 10.1371/journal.pone.0306391] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2022] [Accepted: 06/14/2024] [Indexed: 07/03/2024] Open
Abstract
OBJECTIVE The objective of this study was to retrospectively assess the effect of Radiofrequency Volumetric Tissue Reduction (RFVTR) on hypertrophic turbinates and clinical outcome in brachycephalic dogs when included in multi-level surgery (MLS). STUDY DESIGN Clinical retrospective multicenter study. ANIMALS 132 client-owned brachycephalic dogs. METHODS 132 brachycephalic dogs with high-grade Brachycephalic Obstructive Airway Ayndrome (BOAS) and hypertrophic turbinates were treated with RFVTR as part of MLS of the upper airways. Intranasal obstruction was evaluated by computer tomography (CT) and antero-/retrograde rhinoscopy before and 6 months after RFVTR. The clinical records, the CT images and the rhinoscopy videos were reviewed and clinical evolution was evaluated using a standardized questionnaire. The data was scored semi-quantitatively. RESULTS In this study, 132 patients were included for a follow-up period of 120 weeks. RFVTR resulted in minor complications, including serous nasal discharge within the first postoperative week in all dogs, and intermittent nasal congestion between 3-8 weeks after treatment in 24.3% of the patients. Rhinoscopy and CT follow-ups were available for 33 patients. Six months after treatment intranasal airspace was increased (p = 0.002) and the presence and overall amount of mucosal contact points was reduced (p = 0.039). CONCLUSION MLS with RFVTR led to a significant reduction in turbinate volume at the 6-month follow-up examination and significant clinical improvement over a long-term period of 120 weeks. This suggests the viability of RFVTR as a turbinate-preserving treatment for intranasal obstruction in dogs with BOAS. CLINICAL SIGNIFICANCE RFVTR is a minimally invasive turbinoplasty technique for intranasal obstruction in dogs with BOAS and can be included in MLS without increasing complication rates.
Collapse
Affiliation(s)
| | - Brigitte von Rechenberg
- Center for Applied Biotechnology and Molecular Medicine (CABMM), University of Zurich, Zurich, Switzerland
| | - Henning Richter
- Center for Applied Biotechnology and Molecular Medicine (CABMM), University of Zurich, Zurich, Switzerland
- Diagnostic Imaging Research Unit (DIRU), Clinic for Diagnostic Imaging, Vetsuisse Faculty, University of Zurich, Zurich, Switzerland
| |
Collapse
|
2
|
Li Z, Shao W, Lv X, Wang B, Han L, Gong S, Wang P, Feng Y. Advances in experimental models of osteonecrosis of the femoral head. J Orthop Translat 2023; 39:88-99. [PMID: 36819298 PMCID: PMC9931935 DOI: 10.1016/j.jot.2023.01.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/14/2022] [Revised: 01/02/2023] [Accepted: 01/08/2023] [Indexed: 02/05/2023] Open
Abstract
Background Osteonecrosis of the femoral head (ONFH) is a devastating disease affecting young adults, resulting in significant pain, articular surface collapse, and disabling dysfunction. ONFH can be divided into two broad categories: traumatic and non-traumatic. It has been established that ONFH results from an inadequate blood supply that causes the death of osteocytes and bone marrow cells. Nonetheless, the precise mechanism of ONFH remains to be elucidated. In this regard, preclinical animal and cell models to study ONFH have been established to assess the efficacy of various modalities for preventing and treating ONFH. Nevertheless, it should be borne in mind that many models do not share the same physiologic and metabolic characteristics as humans. Therefore, it is necessary to establish a reproducible model that better mimics human disease. Methods We systematically reviewed the literatures in regard to ONFH experimental models over the past 30 years. The search was performed in PubMed and Web of Science. Original animal, cell studies with available full-text were included. This review summarizes different methods for developing animal and cell experimental models of ONFH. The advantages, disadvantages and success rates of ONFH models are also discussed. Finally, we provide experimental ONFH model schemes as a reference. Results According to the recent literatures, animal models of ONFH include traumatic, non-traumatic and traumatic combined with non-traumatic models. Most researchers prefer to use small animals to establish non-traumatic ONFH models. Indeed, small animal-based non-traumatic ONFH modeling can more easily meet ethical requirements with large samples. Otherwise, gradient concentration or a particular concentration of steroids to induce MSCs or EPCs, through which researchers can develop cell models to study ONFH. Conclusions Glucocorticoids in combination with LPS to induce ONFH animal models, which can guarantee a success rate of more than 60% in large samples. Traumatic vascular deprivation combines with non-traumatic steroids to induce ONFH, obtaining success rates ranging from 80% to 100%. However, animals that undergo vascular deprivation surgery may not survive the glucocorticoid induction process. As for cell models, 10-6mol/L Dexamethasone (Dex) to treat bone marrow stem cells, which is optimal for establishing cell models to study ONFH. The translational potential of this article This review aims to summarize recent development in experimental models of ONFH and recommended the modeling schemes to verify new models, mechanisms, drugs, surgeries, and biomaterials of ONFH to contribute to the prevention and treatment of ONFH.
Collapse
Affiliation(s)
- Zilin Li
- Department of Orthopedics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Wenkai Shao
- Department of Orthopedics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Xiao Lv
- Department of Orthopedics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Bo Wang
- Department of Rehabilitation, Wuhan No. 1 Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Lizhi Han
- Department of Orthopedics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Song Gong
- Department of Orthopedics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Ping Wang
- Department of Orthopedics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Yong Feng
- Department of Orthopedics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China,Corresponding author.
| |
Collapse
|
3
|
Bullone M, Garberoglio R, Pregel P, Cannizzo FT, Gagliardo A, Martano M, Bollo E, Scaglione FE. Characterization of the ablation zones produced by three commercially available systems from a single vendor for radiofrequency thermoablation in an ex vivo swine liver model. Vet Med Sci 2020; 6:1041-1048. [PMID: 32613738 PMCID: PMC7738736 DOI: 10.1002/vms3.319] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2019] [Revised: 05/24/2020] [Accepted: 06/11/2020] [Indexed: 12/25/2022] Open
Abstract
Background Radiofrequency Ablation (RFA) is rarely performed in veterinary medicine. A rationale exists for its use in selected cases of canine liver tumours. RFA induces ablation zones of variable size and geometry depending on the technique used and on the impedance of the targeted organ. Objectives (a) to describe the geometry and reproducibility of the ablation zones produced by three commercially available systems from a single company, using isolated swine liver parenchyma as a model for future veterinary applications in vivo; (b) to study the effects of local saline perfusion into the ablated parenchyma through the electrode tip and of single versus double passage of the electrode on size, geometry and reproducibility of the ablation zones produced. Methods Size, and geometry of ablation zones reproduced in six livers with one cooled and perfused (saline) and two cooled and non‐perfused systems, after single or double passage (n = 6/condition), were assessed macroscopically on digitalized images by a blinded operator. Longitudinal and transverse diameters, equivalent diameter, estimated volume and roundness index were measured. Reproducibility was assessed as coefficient of variation. Results and Conclusions Ablation zone reproducibility was higher when expressed in terms of ablation zone diameters than estimated volume. Local saline perfusion of the parenchyma through the electrode tip during RFA increased the ablation zone longitudinal diameter. Ablation zone estimated volume increased with saline perfusion only when double passage was performed. These data may provide useful information for those clinicians who intend to include RFA as an additive tool in veterinary interventional radiology.
Collapse
Affiliation(s)
- Michela Bullone
- Department of Veterinary Sciences, University of Turin, Grugliasco, Italy
| | - Roberto Garberoglio
- Division of endocrinology, diabetology and metabolism - Department of Medical Sciences, University of Turin, Torino, Italy
| | - Paola Pregel
- Department of Veterinary Sciences, University of Turin, Grugliasco, Italy
| | | | - Arianna Gagliardo
- Department of Veterinary Sciences, University of Turin, Grugliasco, Italy
| | - Marina Martano
- Department of Veterinary Sciences, University of Turin, Grugliasco, Italy
| | - Enrico Bollo
- Department of Veterinary Sciences, University of Turin, Grugliasco, Italy
| | - Frine E Scaglione
- Department of Veterinary Sciences, University of Turin, Grugliasco, Italy
| |
Collapse
|
4
|
Chaudhry MBH, Salam B, Khandwala K, Sayani R, Muhammad A, Haq TU. Image-guided Percutaneous Radiofrequency Ablation for Osteoid Osteoma: Experience from a Developing Nation. Cureus 2019; 11:e5633. [PMID: 31700736 PMCID: PMC6822922 DOI: 10.7759/cureus.5633] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023] Open
Abstract
Objective The purpose of this study is to report our experience in using image-guided percutaneous radiofrequency ablation (RFA) for the treatment of osteoid osteoma (OO) and the subsequent duration of pain relief over a period of about six years (May 2013-March 2019; 70 months) at a tertiary-care hospital in a developing nation. Methods A retrospective study was performed at the radiology department of Aga Khan University, Karachi, Pakistan. All patients who had undergone image-guided percutaneous RFA for OO between May 2013-March 2019 were included. All cases had been performed with CT-guidance under general anesthesia, with an additional local anesthesia injection also administered to the patients. A soloist needle had been used for RFA. The primary success rates, complications, symptom-free intervals, and follow-ups were evaluated. Results In total, 15 patients (11 males, 4 females) of a mean age of 13.93 years (range: 5-25 years; median age: 14.5 years) with OO underwent image-guided percutaneous RFA during a period of 70 months. Eleven lesions were located in the femur, three in the tibia, and one in the humerus. The mean nidus size was 8.1 x 5.73 mm [range: (4.9-11.5) x (3.8-9.1) mm]. All patients were successfully treated and experienced resolution of pain in 2.36 months (range: 1-4 months). During the follow-up period (range: 3-40 months; mean: 13.85 months; median: nine months), none of the patients experienced any relapse or persistent symptoms. No major complications were reported. Conclusion Image-guided percutaneous RFA is a minimally invasive and safe treatment option with high efficiency and a high rate of technical success for the treatment of OO. The risk of recurrence is remote with all patients achieving independent recovery.
Collapse
Affiliation(s)
| | - Basit Salam
- Radiology, Aga Khan University Hospital, Karachi, PAK
| | | | - Raza Sayani
- Radiology, Aga Khan University Hospital, Karachi, PAK
| | | | - Tanveer U Haq
- Radiology, Aga Khan University Hospital, Karachi, PAK
| |
Collapse
|
5
|
Doyle AJ, Graydon AJ, Hanlon MM, French JG. Radiofrequency ablation of osteoid osteoma: Aiming for excellent outcomes in an Australasian context. J Med Imaging Radiat Oncol 2018; 62:789-793. [PMID: 30407729 DOI: 10.1111/1754-9485.12827] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2018] [Accepted: 09/19/2018] [Indexed: 11/27/2022]
Abstract
INTRODUCTION To report a series of patients with osteoid osteoma treated by radiofrequency ablation in whom no complications or recurrences occurred. METHODS Over a 13-year period, 32 consecutive patients with osteoid osteoma were treated by radiofrequency ablation in an Australasian teaching centre. RESULTS All patients had resolution of symptoms with no complication or recurrence. CONCLUSIONS This series is further evidence for the use of radiofrequency ablation as the primary treatment for osteoid osteoma.
Collapse
Affiliation(s)
- Anthony James Doyle
- Radiology, Auckland City Hospital, Auckland, New Zealand.,Anatomy and Medical Imaging, University of Auckland, Auckland, New Zealand
| | - Andrew John Graydon
- Auckland District Health Board, Paediatric Orthopaedics, Starship Childrens Hospital, Auckland, New Zealand
| | - Michael Murray Hanlon
- Auckland District Health Board, Paediatric Orthopaedics, Starship Childrens Hospital, Auckland, New Zealand
| | | |
Collapse
|
6
|
Esteban Cuesta H, Martel Villagran J, Bueno Horcajadas A, Kassarjian A, Rodriguez Caravaca G. Percutaneous radiofrequency ablation in osteoid osteoma: Tips and tricks in special scenarios. Eur J Radiol 2018; 102:169-175. [PMID: 29685532 DOI: 10.1016/j.ejrad.2018.03.008] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2017] [Revised: 02/06/2018] [Accepted: 03/01/2018] [Indexed: 11/29/2022]
Abstract
OBJECTIVES To define specific characteristics of osteoid osteomas treated with radiofrequency ablation, that may benefit from special technical recommendations. METHODS Retrospective analysis of all radiofrequency ablations performed by our group from January 2001 to March 2015. A descriptive study was conducted. We compared our results with the available literature to determine the most frequent special scenarios. RESULTS 207 radiofrequency ablations were performed in 200 patients. We defined the following scenarios: osteoid osteomas located in the spine, close to neurovacular structures, osteoid osteomas in small bones (hands and feet), intra-articular, deeply located or superficial and lesions with extensive periosteal reaction. CONCLUSIONS The scenarios defined required special considerations and technical variations. Implementing the different tips and tricks shown in the article, the most complex osteoid osteomas could be successfully ablated.
Collapse
Affiliation(s)
- Helena Esteban Cuesta
- Hospital Clínico Universitario Lozano Blesa, San Juan Bosco, 15, 50009, Zaragoza, Spain.
| | - José Martel Villagran
- Hospital Universitario Fundación de Alcorcón, Calle Budapest, 1, 28922, Alcorcón, Madrid, Spain.
| | | | - Ara Kassarjian
- Corades, LLC, Brookline, 4 Massachusetts Park St Unit 3, 02446-6244, MA, USA; Medical Service, Madrid Open Tennis, Madrid, Spain.
| | | |
Collapse
|
7
|
Zhao W, Chen JZ, Hu JH, Huang JQ, Jiang YN, Luo G, Yi GF, Peng ZH, Wang H, Shen J, Gao BL. In vivo effects of radiofrequency ablation on long bones and the repair process in swine models. Jpn J Radiol 2016; 35:31-39. [PMID: 27822778 DOI: 10.1007/s11604-016-0596-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2016] [Accepted: 10/21/2016] [Indexed: 12/20/2022]
Abstract
PURPOSE To investigate in vivo effect of radiofrequency ablation (RFA) on swine long bones and the repair process. MATERIALS AND METHODS RFA was performed in six swine at the end and middle part of the tibia or femur. After RFA, radiological examinations were performed, and the swine were killed immediately and at different time points post-RFA for histopathological examination. RESULTS All swine had successful RFA. The RFA-induced elliptical necrotic area ranged from 3.81-5.24 cm2 (mean 4.08 ± 0.73 cm2) at the bone end but 5.60-8.98 cm2 (mean 7.58 ± 1.41) at the middle part immediately after RFA until 10 days, with the necrosis area significantly smaller (P = 0.000) at the end than at the middle. RFA only damaged the cortical bone slightly (0.01 cm thick) with no damage to the soft tissues outside the compact bone at both the end and middle. Surrounding the elliptic pale zone of coagulative necrosis was a narrow brown band of hemorrhage and inflammatory exudate. From day 10 until week 12, tissue proliferation and repair became increasingly apparent, with proliferated granulation, fibrous tissue, and fresh and mature bone trabecula. CONCLUSION RFA can quickly and effectively destroy the cancellous bone tissue without affecting the cortical bone and activate bone remodeling.
Collapse
Affiliation(s)
- Wei Zhao
- Department of Medical Imaging, The First Affiliated Hospital, Kunming Medical University, 295 Xichang Road, Kunming, Yunnan, 650032, People's Republic of China
| | - Jin-Zhou Chen
- Department of Medical Imaging, The First Affiliated Hospital, Kunming Medical University, 295 Xichang Road, Kunming, Yunnan, 650032, People's Republic of China
| | - Ji-Hong Hu
- Department of Medical Imaging, The First Affiliated Hospital, Kunming Medical University, 295 Xichang Road, Kunming, Yunnan, 650032, People's Republic of China
| | - Jian-Qiang Huang
- Department of Medical Imaging, The First Affiliated Hospital, Kunming Medical University, 295 Xichang Road, Kunming, Yunnan, 650032, People's Republic of China
| | - Yong-Neng Jiang
- Department of Medical Imaging, The First Affiliated Hospital, Kunming Medical University, 295 Xichang Road, Kunming, Yunnan, 650032, People's Republic of China
| | - Gang Luo
- Department of Medical Imaging, The First Affiliated Hospital, Kunming Medical University, 295 Xichang Road, Kunming, Yunnan, 650032, People's Republic of China
| | - Gen-Fa Yi
- Department of Medical Imaging, The First Affiliated Hospital, Kunming Medical University, 295 Xichang Road, Kunming, Yunnan, 650032, People's Republic of China
| | - Zhao-Hong Peng
- Department of Medical Imaging, The First Affiliated Hospital, Kunming Medical University, 295 Xichang Road, Kunming, Yunnan, 650032, People's Republic of China
| | - Hui Wang
- Department of Medical Imaging, The First Affiliated Hospital, Kunming Medical University, 295 Xichang Road, Kunming, Yunnan, 650032, People's Republic of China
| | - Jin Shen
- Department of Medical Imaging, The First Affiliated Hospital, Kunming Medical University, 295 Xichang Road, Kunming, Yunnan, 650032, People's Republic of China
| | - Bu-Lang Gao
- Department of Medical Imaging, The First Affiliated Hospital, Kunming Medical University, 295 Xichang Road, Kunming, Yunnan, 650032, People's Republic of China.
| |
Collapse
|
8
|
Irastorza RM, Trujillo M, Martel Villagrán J, Berjano E. Computer modelling of RF ablation in cortical osteoid osteoma: Assessment of the insulating effect of the reactive zone. Int J Hyperthermia 2016; 32:221-30. [DOI: 10.3109/02656736.2015.1135998] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
|
9
|
Ouakrim R, Ouchrif Y, El Ouakili I, Kharmaz M, Elamrani MO, Elouadghiri M, Mahfoud M, Elbardouni A, Lahlou A, Berrada MS. [Elbow pain in a young athlete revealing osteoid osteoma of the coronoid process: report of a case]. Pan Afr Med J 2015; 22:45. [PMID: 26664546 PMCID: PMC4662519 DOI: 10.11604/pamj.2015.22.45.7161] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2015] [Accepted: 09/12/2015] [Indexed: 11/23/2022] Open
Abstract
L'ostéome ostéoïde de l'apophyse coronoïde est exceptionnel, pose des problèmes diagnostiques et thérapeutiques. La douleur représente le maître symptôme. La perte d'extension complète est classique, cependant celle de la pronation et supination est très rare. Le scanner constitue l'examen radiologique de référence à condition de réaliser des coupes fines. La résection monobloc à foyer ouvert constitue le traitement de référence. Les traitements percutanés sont aussi efficaces mais au coude la proximité des éléments vasculo-nerveux et du cartilage articulaire rendent leurs indications plus limitées.
Collapse
Affiliation(s)
- Redouane Ouakrim
- Service de Chirurgie Orthopédique et Traumatologique, CHU de Rabat, Rabat, Maroc
| | - Younes Ouchrif
- Service de Chirurgie Orthopédique et Traumatologique, CHU de Rabat, Rabat, Maroc
| | - Issam El Ouakili
- Service de Chirurgie Orthopédique et Traumatologique, CHU de Rabat, Rabat, Maroc
| | - Mohammed Kharmaz
- Service de Chirurgie Orthopédique et Traumatologique, CHU de Rabat, Rabat, Maroc
| | - Moulay Omar Elamrani
- Service de Chirurgie Orthopédique et Traumatologique, CHU de Rabat, Rabat, Maroc
| | - Mohammed Elouadghiri
- Service de Chirurgie Orthopédique et Traumatologique, CHU de Rabat, Rabat, Maroc
| | - Mustapha Mahfoud
- Service de Chirurgie Orthopédique et Traumatologique, CHU de Rabat, Rabat, Maroc
| | - Ahmed Elbardouni
- Service de Chirurgie Orthopédique et Traumatologique, CHU de Rabat, Rabat, Maroc
| | - Abdou Lahlou
- Service de Chirurgie Orthopédique et Traumatologique, CHU de Rabat, Rabat, Maroc
| | | |
Collapse
|
10
|
Pezeshki PS, Davidson SR, Akens MK, Murphy K, McCann C, Sherar M, Whyne CM, Yee AJM. Helical coil electrode radiofrequency ablation designed for application in osteolytic vertebral tumors--initial evaluation in a porcine model. Spine J 2015; 15:1832-40. [PMID: 25819585 DOI: 10.1016/j.spinee.2015.03.028] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/23/2014] [Revised: 03/02/2015] [Accepted: 03/17/2015] [Indexed: 02/03/2023]
Abstract
BACKGROUND CONTEXT Radiofrequency ablation (RFA) is emerging as a complementary treatment for vertebral metastases. Traditional RFA induces frictional heating leading to local tissue necrosis but often yields small, incomplete, and inhomogeneous zones of ablation in bone. We have developed a new bone-specific RFA electrode that uses a nontraditional frequency (27.12 MHz) and geometry (helical), exploiting a magnetic field and an electric field to generate larger and more comprehensive treatment zones. PURPOSE The purpose of the study was to evaluate the feasibility and safety of the Bone Coil RFA electrode in the spine. STUDY DESIGN This is a preclinical in vivo study based on basic science. METHODS Under institutional approval, six healthy Yorkshire pigs received a sham and an RF treatment in two adjacent cervical vertebrae. To deploy the Bone Coil RFA device in dense porcine vertebrae, a surgical approach was required; an irrigated coring drill bit created a cylindrical path in the vertebral bodies through which the RFA electrodes were placed. The electronic circuit was completed by four grounding pads. Treatment was delivered for 10 minutes at 20 W (n=1), 25 W (n=1), and 30 W (n=4). To monitor the thermal rise and for safety, fiber-optic probes recorded temperatures in the center of each coil and near the spinal foramen. After the procedure, animals were monitored for 2 weeks. Magnetic resonance imaging (MRI) was completed immediately after treatment and at 14 days. Magnetic resonance image segmentation and histology were used to evaluate the ablation volume. RESULTS Comprehensive treatment of the porcine vertebrae was demonstrated by temperature monitoring, MRI, and histology. Large zones of RF ablation were obtained (RF: 3.72±0.73 cm3 vs. sham: 1.98±0.16 cm3, p<.05), confined within the vertebral body. Internal temperatures were elevated with RF (66.1 °C-102.9 °C), without temperature rise outside of the vertebrae (38.2 °C ± 1.5 °C). Mobility, neurological responses, and behavior were normal, consistent with preprocedural examination. Magnetic resonance imaging best visualized ablation at Day 14. Histology revealed comprehensive homogeneous coagulative necrosis with little peripheral sign of repair. CONCLUSIONS The Bone Coil RFA device created large intravertebral ablation volumes with no neurologic sequelae. Radiofrequency thermal ablation (clearly distinguished from the much smaller effects arising from core drilling) corresponded to the homogeneous necrosis visible on histology.
Collapse
Affiliation(s)
- Padina S Pezeshki
- Institute of Biomaterials & Biomedical Engineering (IBBME), University of Toronto, Rosebrugh Building, RM 407 164 College St, Toronto, ON M5S 3G9, Canada; Sunnybrook Health Sciences Centre 2075 Bayview Ave, Room MG 371B Toronto, ON M4N 3M5, Canada
| | - Sean R Davidson
- Techna Institute, University Health Network, 124-100 College St, Toronto, Ontario M5G 1P5, Canada
| | - Margarete K Akens
- Institute of Biomaterials & Biomedical Engineering (IBBME), University of Toronto, Rosebrugh Building, RM 407 164 College St, Toronto, ON M5S 3G9, Canada; Techna Institute, University Health Network, 124-100 College St, Toronto, Ontario M5G 1P5, Canada
| | - Kieran Murphy
- Institute of Biomaterials & Biomedical Engineering (IBBME), University of Toronto, Rosebrugh Building, RM 407 164 College St, Toronto, ON M5S 3G9, Canada; Techna Institute, University Health Network, 124-100 College St, Toronto, Ontario M5G 1P5, Canada
| | - Claire McCann
- Sunnybrook Health Sciences Centre 2075 Bayview Ave, Room MG 371B Toronto, ON M4N 3M5, Canada
| | - Michael Sherar
- Institute of Biomaterials & Biomedical Engineering (IBBME), University of Toronto, Rosebrugh Building, RM 407 164 College St, Toronto, ON M5S 3G9, Canada; Techna Institute, University Health Network, 124-100 College St, Toronto, Ontario M5G 1P5, Canada
| | - Cari M Whyne
- Institute of Biomaterials & Biomedical Engineering (IBBME), University of Toronto, Rosebrugh Building, RM 407 164 College St, Toronto, ON M5S 3G9, Canada; Sunnybrook Health Sciences Centre 2075 Bayview Ave, Room MG 371B Toronto, ON M4N 3M5, Canada
| | - Albert J M Yee
- Institute of Biomaterials & Biomedical Engineering (IBBME), University of Toronto, Rosebrugh Building, RM 407 164 College St, Toronto, ON M5S 3G9, Canada; Sunnybrook Health Sciences Centre 2075 Bayview Ave, Room MG 371B Toronto, ON M4N 3M5, Canada.
| |
Collapse
|
11
|
Bathaie SZ, Faridi N, Nasimian A, Heidarzadeh H, Tamanoi F. How Phytochemicals Prevent Chemical Carcinogens and/or Suppress Tumor Growth? Enzymes 2015; 37:1-42. [PMID: 26298454 DOI: 10.1016/bs.enz.2015.06.003] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Phytochemicals are a powerful group of chemicals that are derived from natural resource, especially with plants origin. They have shown to exhibit chemoprevention and chemotherapeutic effects not only in cell lines and in animal models of cancer but also some of them are in the clinical trial phase I and II. Despite numerous reports of these phytochemical effects on cancer, an overview of the mechanisms of their action and their effects on various cellular and molecular functions important in the inhibition of cancer progression has been lacking. In this review, we attempt to catalogue various studies to examine the effect of phytochemicals in cancer initiation, promotion, signaling, and epigenetic changes. Because of the numerous studies in these topics, we only pointed out to some examples in each section.
Collapse
Affiliation(s)
- S Zahra Bathaie
- Department of Clinical Biochemistry, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran; Department of Microbiology, Immunology and Molecular Genetics, University of California, Los Angeles, California, USA.
| | - Nasim Faridi
- Department of Clinical Biochemistry, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran
| | - Ahmad Nasimian
- Department of Clinical Biochemistry, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran
| | - Hamid Heidarzadeh
- Department of Clinical Biochemistry, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran
| | - Fuyuhiko Tamanoi
- Department of Microbiology, Immunology and Molecular Genetics, University of California, Los Angeles, California, USA
| |
Collapse
|
12
|
Shiguetomi-Medina JM, Rahbek O, Abood AAH, Stødkilde-Jørgensen H, Møller-Madsen B. Thermal epiphysiodesis performed with radio frequency in a porcine model. Acta Orthop 2014; 85:538-42. [PMID: 25036720 PMCID: PMC4164874 DOI: 10.3109/17453674.2014.939014] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023] Open
Abstract
BACKGROUND AND PURPOSE Current techniques for epiphysiodesis involve opening of cortical windows; use of staples, screws, and tension devices; and fusion with curettes or drills. Complications may have serious consequences. There is a need for a more reliable, precise, and less traumatic procedure that overcomes the known complications from existing techniques. We analyzed a new epiphysiodesis technique using radio-frequency ablation (RFA) in a porcine model. METHODS Six 35-kg and two 25-kg immature pigs were used. 1 hind leg of each animal was randomly selected and the proximal tibia growth plate was ablated laterally and medially. The contralateral leg was used as a control. MR images were obtained immediately after the ablation and 12 weeks later for 6 animals, and 24 weeks later for the other 2 animals. CT was done for the 2 animals that were followed for 24 weeks for proof of bone bridges. RESULTS Both tibias were equal in length initially. At the 12-week follow-up, there was an average leg length discrepancy of 3.9 mm (95% CI: 3.0-4.8), and at 24 weeks the difference was 8.4 mm and 7.5 mm. No damage to the adjacent tissue was found. Bone bridges and physeal closure were found after 24 weeks. The pigs showed no discomfort after the intervention. INTERPRETATION We found RFA to be feasible for epiphysiodesis in a pig model. The method is minimally invasive and recovery may be quick compared to conventional methods. We recommend that the method should be tested in larger-scale safety studies before clinical application.
Collapse
Affiliation(s)
| | - Ole Rahbek
- Aarhus University, Orthopaedic Research Laboratory,Department of Children’s Orthopaedics, Aarhus University Hospital
| | | | | | - Bjarne Møller-Madsen
- Aarhus University, Orthopaedic Research Laboratory,Department of Children’s Orthopaedics, Aarhus University Hospital
| |
Collapse
|
13
|
Thermal influence of radiofrequency ablation for bone: an experimental study in normal rabbit bone. Skeletal Radiol 2014; 43:459-65. [PMID: 24435712 DOI: 10.1007/s00256-013-1807-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/07/2013] [Revised: 10/20/2013] [Accepted: 12/15/2013] [Indexed: 02/02/2023]
Abstract
OBJECTIVE To evaluate the heat effects of radiofrequency ablation (RFA) on normal bone by mechanical testing, MRI, and histology. MATERIALS AND METHODS The institutional animal care and use committee approved the animal study. Thirty-two adult Japanese white rabbits were included in our study. Bone biopsy needles were inserted from the distal end of the right (RFA side) and the left (control side) femurs using a fluoroscopic guide. A 17-gauge internally cooled RFA electrode with a 2-cm active tip was inserted through the needle to the right femur, and RFA was performed for 12 min using a 200-W generator. Animals were divided into four groups and 8 animals from each group were euthanized on day 1, day 7, day 30, and day 60 after RFA. MRI was performed prior to euthanasia. Three-point bending test was performed to measure flexural strength. Student's t test was used to evaluate for significant differences between RFA and control side for each group. Femurs underwent histological examination by hematoxylin and eosin staining after the bending test. RESULTS MRI showed a high-intensity rim around the bone on T2WI. Three-point bending test showed no statistically significant differences (P < 0.05) between the RFA and the control side in any of the groups. Histologically, osteocytes of cortical bone showed cell death, but the lamellar structure was preserved in all groups and bone remodeling was observed. CONCLUSION Heat by RFA did not change normal bone strength within 2 months, despite the heat effects in the cortical bone and cell death.
Collapse
|
14
|
CT-guided radiofrequency ablation of osteoid osteoma and osteoblastoma: Clinical success and long-term follow up in 77 patients. Eur J Radiol 2012; 81:3426-34. [DOI: 10.1016/j.ejrad.2012.04.037] [Citation(s) in RCA: 87] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2011] [Revised: 04/08/2012] [Accepted: 04/13/2012] [Indexed: 11/19/2022]
|
15
|
Palussière J, Pellerin-Guignard A, Descat E, Cornélis F, Dixmérias F. Radiofrequency ablation of bone tumours. Diagn Interv Imaging 2012; 93:660-4. [DOI: 10.1016/j.diii.2012.06.008] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
16
|
Asayama Y, Nishie A, Ishigami K, Kakihara D, Ushijima Y, Takayama Y, Fujita N, Tajima T, Yoshimitsu K, Matsuda S, Iwamoto Y, Honda H. CT-guided radiofrequency ablation of osteoid osteoma in the long bones of the lower extremity. World J Radiol 2012; 4:278-82. [PMID: 22778881 PMCID: PMC3391674 DOI: 10.4329/wjr.v4.i6.278] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/22/2012] [Revised: 04/16/2012] [Accepted: 04/23/2012] [Indexed: 02/06/2023] Open
Abstract
AIM: To present our initial experience with computed tomography guided radiofrequency ablation (RFA) of osteoid osteoma (OO) in our institution.
METHODS: RFA was performed on eight patients (5 males and 3 females) with clinically and radiologically diagnosed OO (femoral neck, n = 4; femoral diaphysis, n = 2; tibial diaphysis, n = 1; fibular diaphysis, n = 1). Ablation was performed using an electrode with a 10-mm exposed tip for a total of 4-6 min at a targeted temperature of 90 degrees Celsius. No cooling system was used. The intervention was accepted as technically successful if the tip of the electrode could be placed within the center of the nidus. We defined clinical success as a disappearance within 2 wk after treatment of symptoms that had manifested at presentation.
RESULTS: All procedures were technically successful. No major or immediate complications were observed. Clinical success was achieved in six of eight patients in the first procedure. A second procedure was performed for two patients who had recurrent or continued pain, and one of these cases was successfully treated. The overall rate of success was 87.5% (7/8). No complication was observed.
CONCLUSION: Our preliminary results indicate a favorable success rate and no complications and are compatible with the previous reports of RFA of OO.
Collapse
|
17
|
Fan M, Peng J, Wang A, Zhang L, Liu B, Ren Z, Xu W, Sun J, Xu L, Xiao D, Qin L, Lu S, Wang Y, Guo QY. Emu model of full-range femoral head osteonecrosis induced focally by an alternating freezing and heating insult. J Int Med Res 2011; 39:187-98. [PMID: 21672321 DOI: 10.1177/147323001103900120] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
The emu, a large bipedal bird with hip joint biomechanics similar to humans, was used to establish an experimental model of femoral head osteonecrosis and subsequent femoral head collapse. Focal lesions were induced in 20 adult male emus using an alternating liquid nitrogen freezing and radiofrequency heating insult. At 2, 4, 8, 12 and 16 weeks post-surgery, hip magnetic resonance imaging (MRI) was performed. Before the emus were sacrificed, barium sulphate was infused to the lower extremity to study blood vessel distribution patterns. Femoral samples were scanned by micro-computed tomography (micro-CT) and evaluated histologically. Hip MRI showed changes from broad oedema to femoral head collapse. Emus developed a crippled gait from post-operative week 6. Micro-CT scans and histology showed human-like osteonecrotic changes with an impaired local blood supply. The protocol resulted in consistent full-range osteonecrosis of the femoral head that may serve as a model for testing potential treatments.
Collapse
Affiliation(s)
- M Fan
- Orthopaedic Research Institute, General Hospital of Chinese People's Liberation Army, Beijing, China
| | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
18
|
Experimental animal models of osteonecrosis. Rheumatol Int 2011; 31:983-94. [PMID: 21340568 DOI: 10.1007/s00296-011-1819-9] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2010] [Accepted: 01/30/2011] [Indexed: 02/07/2023]
Abstract
Osteonecrosis (ON) or avascular necrosis (AVN) is a common bone metabolic disorder, mostly affecting femoral head. Although many biological, biophysical, and surgical methods have been tested to preserve the femoral head with ON, none has been proven fully satisfactory. It lacks consensus on an optimal approach for treatment. This is due, at least in part, to the lack of ability to systematically compare treatment efficacy using an ideal animal model that mimics full-range osteonecrosis of femoral head (ONFH) in humans with high incidence of joint collapse accompanied by reparative reaction adjacent to the necrotic bone in a reproducible and accessible way. A number of preclinical animal ON models have been established for testing potential efficacy of various modalities developed for prevention and treatment of ON before introduction into clinics for potential applications. This paper describes a number of different methods for creating animal experimental ON models. Advantages and disadvantages of such models are also discussed as reference for future research in battle against this important medical condition.
Collapse
|
19
|
Foulner D. Radiofrequency ablation of a spinal osteoid osteoma: low heat-load technique. J Vasc Interv Radiol 2011; 21:1596-8. [PMID: 20801684 DOI: 10.1016/j.jvir.2010.05.023] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2009] [Revised: 12/04/2009] [Accepted: 05/21/2010] [Indexed: 10/19/2022] Open
Abstract
The present report describes successful radiofrequency ablation of a small osteoid osteoma in the second lumbar (L2) pedicle of a 10-year-old boy who had been experiencing several months of back pain. The lesion had no cortical bone separation from the spinal canal contents and was positioned immediately adjacent to a synovial facet joint. Treatment involved a low heat-load technique to avoid damage to nearby sensitive structures. The adjacent epidural space was monitored for temperature increase.
Collapse
Affiliation(s)
- Deryck Foulner
- Department of Radiology, Sir Charles Gairdner Hospital, Verdun St, Nedlands, Perth, WA 6009, Australia.
| |
Collapse
|
20
|
Le Corroller T, Parratte S, Amous Z, Flecher X, Argenson JN, Champsaur P. Focal Articular Cartilage Defect Treated by Percutaneous Radiofrequency Ablation. J Vasc Interv Radiol 2010; 21:1599-602. [DOI: 10.1016/j.jvir.2010.06.011] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2009] [Revised: 04/09/2010] [Accepted: 06/12/2010] [Indexed: 10/19/2022] Open
|
21
|
Abstract
Musculoskeletal tumors, both primary neoplasms and metastatic lesions, present a therapeutic challenge for the physician who wishes to provide palliative pain relief using the least invasive approach. The increasing sophistication of imaging modalities such as CT in precisely localizing neoplasm, coupled with the widespread use of radiofrequency ablation (RFA) for treatment of other types of tumor, has generated interest in using RFA to treat musculoskeletal tumors. Primary bone tumors (eg, osteoid osteoma) and metastatic bone tumors have been successfully treated with RFA. Success rates with RFA are equal to those with standard surgical curettage, but RFA has the advantage of decreased surgical morbidity. The procedure is relatively safe, is well-tolerated by the patient, and typically can be performed on an outpatient basis. The most common serious complication reported is localized skin necrosis, which occurs rarely. RFA appears to be a viable minimally invasive approach for palliative treatment of selected bone tumors.
Collapse
|
22
|
Martel Villagrán J, Bueno Horcajadas A, Ortiz Cruz E. Tratamiento mediante radiofrecuencia percutánea de los tumores óseos benignos: osteoma osteoide, osteoblastoma y condroblastoma. RADIOLOGIA 2009; 51:549-58. [DOI: 10.1016/j.rx.2009.08.001] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2009] [Revised: 08/04/2009] [Accepted: 08/17/2009] [Indexed: 01/14/2023]
|
23
|
Mnif H, Kammoun MH, Zrig M, Koubaa M, Abid A. Osteoid osteoma of the coronoid process tip. J Shoulder Elbow Surg 2009; 18:e9-12. [PMID: 19328016 DOI: 10.1016/j.jse.2008.12.010] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/07/2008] [Revised: 11/13/2008] [Accepted: 12/30/2008] [Indexed: 02/01/2023]
Affiliation(s)
- Hichem Mnif
- Department of Orthopaedic Surgery, Monastir, Tunisia.
| | | | | | | | | |
Collapse
|
24
|
Radiofrequency ablation of chondroblastoma: procedure technique, clinical and MR imaging follow up of four cases. Skeletal Radiol 2008; 37:1011-7. [PMID: 18641981 DOI: 10.1007/s00256-008-0526-4] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/21/2008] [Revised: 05/15/2008] [Accepted: 05/16/2008] [Indexed: 02/02/2023]
Abstract
PURPOSE The aim of this study is to describe the procedure technique, clinical and imaging outcomes of patients treated with radiofrequency ablation for chondroblastoma. MATERIALS AND METHODS Four patients (female/male, 3:1; mean age, 13 years; age range; 9-16 years) underwent the procedure. All had pre-operative magnetic resonance imaging (MRI) and symptomatic, biopsy-proven chondroblastomas (two proximal femur, two proximal tibia). The lesion size ranged from 1.5 to 2.5 cm in maximal dimension (mean size, 1.8 cm). Bone access was gained with a Bonopty biopsy needle system (mean number of radiofrequency needle placements, 5; mean ablation time, 31 min). RESULTS Clinical and MRI follow-up was available in all cases (mean, 12.25 months; range, 5-18 months). All patients reported resolution of symptoms at 2-6 weeks post ablation. At their most recent clinical follow-up, three patients remained completely asymptomatic with full return to normal activities and one patient had minor local discomfort (different pain pattern) that was not limiting activity. All four patients' follow-up MRI studies demonstrated resolution of the oedema pattern around the lesion and temporal evolution of the internal signal characteristics with fatty replacement. CONCLUSION Radiofrequency ablation for chondroblastoma provides an alternative to surgical curettage, and we have demonstrated both a clinical improvement in symptoms and the follow-up MRI appearances.
Collapse
|