Laser-heated needle for biopsy tract ablation: In vivo study of rabbit liver biopsy |
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| Institution: | 1. School of Biosciences, Faculty of Health and Medical Sciences, Taylor’s University, 47500 Subang Jaya, Selangor, Malaysia;2. Department of Biomedical Science, Faculty of Medicine, University of Malaya, 50603 Kuala Lumpur, Malaysia;3. School of Medicine, Faculty of Health and Medical Sciences, Taylor’s University, 47500 Subang Jaya, Selangor, Malaysia;4. Photonics Research Centre, University of Malaya, 50603 Kuala Lumpur, Malaysia;5. Department of Biomedical Imaging, University of Malaya Medical Centre, 50603 Kuala Lumpur, Malaysia;6. Animal Experimental Unit, Faculty of Medicine, University of Malaya, 50603 Kuala Lumpur, Malaysia;1. Biomedical Engineering, University of Cincinnati, Cincinnati, Ohio, USA;2. Guided Therapy Systems/Ardent Sound, Mesa, Arizona, USA;3. Gift of Life Michigan, Ann Arbor, Michigan, USA;4. Surgery, University of Cincinnati, Cincinnati, Ohio, USA;6. Environmental Health, University of Cincinnati, Cincinnati, Ohio, USA;1. Photonics Research Centre, University of Malaya, 50603 Kuala Lumpur, Malaysia;2. Department of Physics, Northwest University, Xi’an, Shaanxi 710069, China;3. Department of Electrical and Electronic Engineering, The University of Nottingham Malaysia Campus, 43500, Malaysia;1. Photonics Research Centre, University of Malaya, 50603 Kuala Lumpur, Malaysia;2. School of Physics, Northwest University, Xi’an, Shaanxi 710069, China |
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| Abstract: | PurposeTo investigate the efficacy of a newly-developed laser-heated core biopsy needle in the thermal ablation of biopsy tract to reduce hemorrhage after biopsy using in vivo rabbit’s liver model.Materials and methodsFive male New Zealand White rabbits weighed between 1.5 and 4.0 kg were anesthetized and their livers were exposed. 18 liver biopsies were performed under control group (without tract ablation, n = 9) and study group (with tract ablation, n = 9) settings. The needle insertion depth (~3 cm) and rate of retraction (~3 mm/s) were fixed in all the experiments. For tract ablation, three different needle temperatures (100, 120 and 150 °C) were compared. The blood loss at each biopsy site was measured by weighing the gauze pads before and after blood absorption. The rabbits were euthanized immediately and the liver specimens were stained with hematoxylin-eosin (H&E) for further histopathological examination (HPE).ResultsThe average blood loss in the study group was reduced significantly (p < 0.05) compared to the control group. The highest percentage of bleeding reduction was observed at the needle temperature of 150 °C (93.8%), followed by 120 °C (85.8%) and 100 °C (84.2%). The HPE results show that the laser-heated core biopsy needle was able to cause lateral coagulative necrosis up to 14 mm diameter along the ablation tract.ConclusionThe laser-heated core biopsy needle reduced hemorrhage up to 93.8% and induced homogenous coagulative necrosis along the ablation tract in the rabbits’ livers. This could potentially reduce the risk of tumor seeding in clinical settings. |
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| Keywords: | Biopsy Tract ablation Fiber laser Hemorrhage Coagulative necrosis Rabbits |
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