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Zheng B, Zhang P, Lv Q, Wu T, Liu Y, Tang J, Ma Y, Cheng L, Xu L, Wang Y, Xue Y, Liu J, Ren J. Development and preclinical evaluation of multifunctional hydrogel for precise thermal protection during thermal ablation. Bioact Mater 2024; 31:119-135. [PMID: 37637083 PMCID: PMC10448243 DOI: 10.1016/j.bioactmat.2023.08.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2023] [Revised: 08/07/2023] [Accepted: 08/08/2023] [Indexed: 08/29/2023] Open
Abstract
Image-guided thermal ablation (TA), which is less invasive, has been widely applied for treating various kinds of tumors. However, TA still poses the potential risk of thermal damage to sensitive tissue nearby. Therefore, an adjunctive thermoprotective hydrodissection technique with constant injection of 5% glucose (5% Glu) has currently been adopted for clinical application, but this may be hazardous to humans. In this study, a multifunctional hyaluronic acid-based hydrogel (HA-Dc) was developed for hydrodissection. Compared with 5% Glu (the most clinically used solution) and the previously reported F127 hydrogel, the HA-Dc hydrogel was studied in vitro in a porcine liver model and in vivo in a rabbit model and showed good injectability and better tissue retention, stability, and thermoprotective properties throughout the TA procedure. Furthermore, in the preclinical evaluation in a Macaca fascicularis (M. fascicularis) model, HA-Dc showed excellent performance in terms of stricter neuroprotection compared with 5% Glu. In addition, the HA-Dc hydrogel with good biocompatibility and controllable degradation behavior in vivo could be a promising platform for thermal protection during clinical TA procedures.
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Affiliation(s)
- Bowen Zheng
- Department of Medical Ultrasonics, The Third Affiliated Hospital of Sun Yat-sen University, Guangdong Province Key Laboratory of Hepatology Research, Multiple Disciplinary Team Center of Thyroid Diseases, No. 600, Tianhe Road, Guangzhou, Guangdong, 510630, PR China
| | - Peng Zhang
- School of Biomedical Engineering, Shenzhen Campus of Sun Yat-sen University, No.66, Gongchang Road, Shenzhen, Guangdong, 518107, PR China
| | - Qijun Lv
- Department of Medical Ultrasonics, The Third Affiliated Hospital of Sun Yat-sen University, Guangdong Province Key Laboratory of Hepatology Research, Multiple Disciplinary Team Center of Thyroid Diseases, No. 600, Tianhe Road, Guangzhou, Guangdong, 510630, PR China
| | - Tao Wu
- Department of Medical Ultrasonics, The Third Affiliated Hospital of Sun Yat-sen University, Guangdong Province Key Laboratory of Hepatology Research, Multiple Disciplinary Team Center of Thyroid Diseases, No. 600, Tianhe Road, Guangzhou, Guangdong, 510630, PR China
| | - Yadong Liu
- School of Biomedical Engineering, Shenzhen Campus of Sun Yat-sen University, No.66, Gongchang Road, Shenzhen, Guangdong, 518107, PR China
| | - Junjie Tang
- School of Biomedical Engineering, Shenzhen Campus of Sun Yat-sen University, No.66, Gongchang Road, Shenzhen, Guangdong, 518107, PR China
| | - Yanping Ma
- Department of Medical Ultrasonics, The Third Affiliated Hospital of Sun Yat-sen University, Guangdong Province Key Laboratory of Hepatology Research, Multiple Disciplinary Team Center of Thyroid Diseases, No. 600, Tianhe Road, Guangzhou, Guangdong, 510630, PR China
| | - Lili Cheng
- School of Biomedical Engineering, Shenzhen Campus of Sun Yat-sen University, No.66, Gongchang Road, Shenzhen, Guangdong, 518107, PR China
| | - Langtao Xu
- School of Biomedical Engineering, Shenzhen Campus of Sun Yat-sen University, No.66, Gongchang Road, Shenzhen, Guangdong, 518107, PR China
| | - Yizhen Wang
- Department of Medical Ultrasonics, The Third Affiliated Hospital of Sun Yat-sen University, Guangdong Province Key Laboratory of Hepatology Research, Multiple Disciplinary Team Center of Thyroid Diseases, No. 600, Tianhe Road, Guangzhou, Guangdong, 510630, PR China
| | - Yifan Xue
- School of Biomedical Engineering, Shenzhen Campus of Sun Yat-sen University, No.66, Gongchang Road, Shenzhen, Guangdong, 518107, PR China
| | - Jie Liu
- School of Biomedical Engineering, Shenzhen Campus of Sun Yat-sen University, No.66, Gongchang Road, Shenzhen, Guangdong, 518107, PR China
| | - Jie Ren
- Department of Medical Ultrasonics, The Third Affiliated Hospital of Sun Yat-sen University, Guangdong Province Key Laboratory of Hepatology Research, Multiple Disciplinary Team Center of Thyroid Diseases, No. 600, Tianhe Road, Guangzhou, Guangdong, 510630, PR China
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Dhiman M, Kumawat AK, Ramjee Repaka. Directional ablation in radiofrequency ablation using a multi-tine electrode functioning in multipolar mode: An in-silico study using a finite set of states. Comput Biol Med 2020; 126:104007. [PMID: 32987201 DOI: 10.1016/j.compbiomed.2020.104007] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2020] [Revised: 09/04/2020] [Accepted: 09/06/2020] [Indexed: 01/26/2023]
Abstract
PURPOSE To analyse the feasibility of directional ablation using a multi-tine electrode. METHODS A multi-tine electrode capable of operating in multipolar mode has been used to study the directional ablation. In addition to the basic design, similar to commercially available FDA approved multi-tine electrode, tines have been insulated from each other inside the probe base and tip using a thin insulating material of thickness 0.25 mm. A cylindrical single-compartment model of size 6 cm × 6 cm has been used to model normal liver tissue. The temperature-controlled radiofrequency ablation has been employed to maintain the tine-tips at different temperatures. Electro-thermal simulations have been performed by using a commercial multi-physics software package based on finite element methods. To make this study feasible a new approach to predict the ablations have been proposed and used in this study. RESULTS Asymmetric ablation zone with up to 5 mm difference in ablation boundary between the intended and non-intended direction has been observed along the transverse direction. Reduction in ablation up to 5 mm along the axial direction in comparison to the monopolar mode has also been observed. CONCLUSION Multi-tine electrode modified to operate in multipolar mode can create directional ablations of different shapes and can be used to target position and shape specific tumours.
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Affiliation(s)
- Manoj Dhiman
- Department of Mechanical Engineering, Indian Institute of Technology Ropar, Rupnagar, Punjab, India
| | - Aakash Kumar Kumawat
- Department of Mechanical Engineering, Indian Institute of Technology Ropar, Rupnagar, Punjab, India
| | - Ramjee Repaka
- Department of Mechanical Engineering, Indian Institute of Technology Ropar, Rupnagar, Punjab, India.
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Meloni MF, Chiang J, Laeseke PF, Dietrich CF, Sannino A, Solbiati M, Nocerino E, Brace CL, Lee FT. Microwave ablation in primary and secondary liver tumours: technical and clinical approaches. Int J Hyperthermia 2016; 33:15-24. [PMID: 27416729 DOI: 10.1080/02656736.2016.1209694] [Citation(s) in RCA: 70] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Thermal ablation is increasingly being utilised in the treatment of primary and metastatic liver tumours, both as curative therapy and as a bridge to transplantation. Recent advances in high-powered microwave ablation systems have allowed physicians to realise the theoretical heating advantages of microwave energy compared to other ablation modalities. As a result there is a growing body of literature detailing the effects of microwave energy on tissue heating, as well as its effect on clinical outcomes. This article will discuss the relevant physics, review current clinical outcomes and then describe the current techniques used to optimise patient care when using microwave ablation systems.
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Affiliation(s)
- Maria Franca Meloni
- a Department of Radiology , Interventional Ultrasound, Institute of Care IGEA , Milan , Italy
| | - Jason Chiang
- b Department of Radiology , University of Wisconsin , Madison , Wisconsin , USA
| | - Paul F Laeseke
- b Department of Radiology , University of Wisconsin , Madison , Wisconsin , USA
| | - Christoph F Dietrich
- c Department of Internal Medicine , Caritas Krankenhas Bad Mergentheim , Bad Mergentheim , Germany
| | - Angela Sannino
- d Department of Clinical Medicine and Surgery , University of Naples Federico II , Naples , Italy
| | - Marco Solbiati
- e Department of Electronics, Information and Bioengineering , Politecnico Milano , Milan , Italy
| | - Elisabetta Nocerino
- f Department of Radiology , San Paolo Hospital, University of Milan , Milan , Italy
| | - Christopher L Brace
- b Department of Radiology , University of Wisconsin , Madison , Wisconsin , USA
| | - Fred T Lee
- b Department of Radiology , University of Wisconsin , Madison , Wisconsin , USA
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