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Chang NW, Liu CA, Hong JA, Shen SH. Effect of iodized oil embolization on temperature change during cryoablation for renal cell carcinoma. MINIM INVASIV THER 2024:1-8. [PMID: 38491916 DOI: 10.1080/13645706.2024.2326019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2022] [Accepted: 02/06/2024] [Indexed: 03/18/2024]
Abstract
INTRODUCTION We aimed to evaluate the effect of transcatheter arterial embolization (TAE) with iodized oil (Lipiodol) on temperature change during cryoablation (CA) for renal cell carcinoma (RCC). MATERIAL AND METHODS We retrospectively reviewed patients receiving CA for RCC from February 2020 to July 2021, including those who received Lipiodol TAE prior to CA (TAE group) and those who underwent only CA with comparable clinical and tumor characteristics (non-TAE group). Clinical data and tumor characteristics of both groups were recorded. The temperature readings of each cryoprobe at every 15 s and 'time to -100 °C' were compared between the groups. RESULTS A total of 17 patients with 18 RCCs were recruited (seven in the TAE group and 11 in the non-TAE group). The 'time to -100 °C' was significantly longer in the TAE group than in the non-TAE group (64.5 ± 24.3 s vs. 48.8 ± 9.7 s, p = 0.018). Positive correlation between 'time to -100 °C' and tumor maximal diameter, RENAL nephrometry and PADUA score were observed in the non-TAE group, while no corresponding correlation was found in the TAE group. CONCLUSIONS Pre-embolization with iodized oil influences the temporal temperature changes during cryoablation by disrupting the positive correlation between the time to reach the target temperature and tumor characteristics.
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Affiliation(s)
- Nai-Wen Chang
- Department of Radiology, Taipei Veterans General Hospital, Taipei, Taiwan
- School of Medicine, National Yang Ming Chiao Tung University, Taipei, Taiwan
| | - Chien-An Liu
- Department of Radiology, Taipei Veterans General Hospital, Taipei, Taiwan
- School of Medicine, National Yang Ming Chiao Tung University, Taipei, Taiwan
| | - Jia-An Hong
- Department of Radiology, Taipei Veterans General Hospital, Taipei, Taiwan
- School of Medicine, National Yang Ming Chiao Tung University, Taipei, Taiwan
| | - Shu-Huei Shen
- Department of Radiology, Taipei Veterans General Hospital, Taipei, Taiwan
- School of Medicine, National Yang Ming Chiao Tung University, Taipei, Taiwan
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Pushkarev AV, Ryabikin SS, Saakyan NY, Tsiganov DI, Burkov IA, Vasilev AO. A study of prostate multiprobe cryoablation near urethra for precision treatment planning. Cryobiology 2022; 109:10-19. [PMID: 36283423 DOI: 10.1016/j.cryobiol.2022.10.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2022] [Revised: 10/14/2022] [Accepted: 10/15/2022] [Indexed: 02/06/2023]
Abstract
The simplified preoperative planning of multiprobe prostate cryoablation limits its efficiency. In order to improve it, the thermal history prediction software is being developed. However, the problem of high risks at the prostate-urethra boundary has not been solved yet. The urethral warming system is used to protect the urethral canal from freezing. On the one hand it is used to reduce the risk of damage to the urethra; on the other hand it increases the risk of insufficient ablation of the tumor. This paper presents a step towards the possibility of carrying out the precision prostate cryoablation in this region. For the experimental part, three cases of arrangement of one and two argon cryoprobes and a heating catheter have been considered. Freezing zone shape and dimensions, and temperature at control points depending on time have been obtained. Experimental results have clearly shown the effect of the heating catheter, the second cryoprobe, and the initial temperature of the biotissue phantom on the freezing zone. After, the thermal aspects of treatment simulation have been developed and verified. A series of calculations have been carried out with the goal to get the information about optimizing the prostate cryoablation on the prostate-urethra boundary. The arrangement of cryoprobes has been proposed for three different variants for prostate cryoablation (sectors of 90, 180° and 360°). The area of prostate tissues near the urethra that cannot be cooled below the necrosis temperature is shown. This information is expected to be useful for improving the quality of cryosurgery planning algorithms (e.g. for tumor treatment).
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Affiliation(s)
- A V Pushkarev
- Bauman Moscow State Technical University, Moscow, Russia; Russian Medical Academy of Continuous Professional Education, Moscow, Russia.
| | - S S Ryabikin
- Bauman Moscow State Technical University, Moscow, Russia
| | - N Yu Saakyan
- Bauman Moscow State Technical University, Moscow, Russia
| | - D I Tsiganov
- Bauman Moscow State Technical University, Moscow, Russia; Russian Medical Academy of Continuous Professional Education, Moscow, Russia
| | - I A Burkov
- Bauman Moscow State Technical University, Moscow, Russia
| | - A O Vasilev
- Bauman Moscow State Technical University, Moscow, Russia; Department of Urology, Moscow State University of Medicine and Dentistry n.a. A.I. Evdokimov, Moscow, Russia
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Yamashita M, Miura H, Ohara Y, Yoshikawa T, Hirota T, Fukunaga T, Takamatsu H, Yamagami T, Yamada K. Evaluation of Temperature Distribution Around the Probe in Cryoablation of Lipiodol-Mixed-Tissue Phantom. Cardiovasc Intervent Radiol 2020; 44:489-495. [PMID: 33210153 DOI: 10.1007/s00270-020-02710-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/07/2020] [Accepted: 11/03/2020] [Indexed: 01/15/2023]
Abstract
PURPOSE To determine whether lipiodol, which has low thermal conductivity, influences ice ball formation during cryoablation of a lipiodol-mixed-tissue phantom. MATERIALS AND METHODS Lipiodol-mixed-tissue phantoms were created by injecting lipiodol (4-6 ml) into the renal arteries of ex vivo porcine kidneys (lipiodol group). A cryoprobe (CryoHit™ Needle S) with a holder that was set with thermocouples at various positions around the cryoprobe was inserted. After freezing for 300 s, the followings were evaluated: ice ball size on CT, temperature distribution around the cryoprobe, and calculated distances at 0 °C and - 20 °C. Each variable was compared between lipiodol group (n = 6) those obtained in a control group without lipiodol injection (n = 6). RESULTS Mean ice ball diameter (width/length) on CT was 22.1 ± 2.3/22.9 ± 2.3 mm in the lipiodol group and 21.6 ± 0.7/22.2 ± 1.3 mm in the control group. Mean cryoprobe temperature was - 118 ± 3.0 °C in the lipiodol group and - 117 ± 2.6 °C in the control group. In both groups, temperature at the 3 mm thermocouple reached approximately - 50 °C and was < 0 °C within ~ 10 mm of the cryoprobe. Temperature of 0/- 20 °C occurred at a mean distance from the cryoprobe of 11.1 ± 0.5/6.9 ± 0.4 mm in the lipiodol group and 11.0 ± 0.2/6.9 ± 0.2 mm in the control group. There was no significant difference in any variable between the groups. CONCLUSION The inclusion of lipiodol in a tissue phantom had no negative effects on ice ball formation that were related to thermal conductivity.
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Affiliation(s)
- Masanori Yamashita
- Department of Radiology, Kyoto Prefectural University of Medicine, 465, Kajii-cho, Kamigyo-ku, Kyoto, 602-8566, Japan.
| | - Hiroshi Miura
- Department of Radiology, Kyoto Prefectural University of Medicine, 465, Kajii-cho, Kamigyo-ku, Kyoto, 602-8566, Japan
| | - Yu Ohara
- Department of Radiology, Kyoto Prefectural University of Medicine, 465, Kajii-cho, Kamigyo-ku, Kyoto, 602-8566, Japan
| | - Tatsuya Yoshikawa
- Department of Radiology, Kyoto Prefectural University of Medicine, 465, Kajii-cho, Kamigyo-ku, Kyoto, 602-8566, Japan
| | - Tatsuya Hirota
- Department of Radiology, Kyoto Prefectural University of Medicine, 465, Kajii-cho, Kamigyo-ku, Kyoto, 602-8566, Japan
| | - Takanobu Fukunaga
- Department of Mechanical Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka, 819-0395, Japan
| | - Hiroshi Takamatsu
- Department of Mechanical Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka, 819-0395, Japan
| | - Takuji Yamagami
- Department of Radiology, Kochi Medical School University, 185-1 Kohasu, Oko-cho, , Nankoku-shi, Kochi, 783-8505, Japan
| | - Kei Yamada
- Department of Radiology, Kyoto Prefectural University of Medicine, 465, Kajii-cho, Kamigyo-ku, Kyoto, 602-8566, Japan
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