Application of cavitation on a laser heating element in surgery

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The article discusses the phenomenon of laser cavitation initiated at the tip of an optical fiber immersed in a liquid under the action of continuous laser radiation. The properties of flooded cumulative jets arising from the collapse of cavitation bubbles are investigated. It is shown that in free space, jets transfer heat through a liquid, and in the case of cavitation inside a tube filled with liquid, they lead to an inversion motion of the liquid. The practical use of the identified effects in medicine allows for effective surgical treatment of vascular diseases, cysts, acute and chronic infected wounds.

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Sobre autores

Mikhail Guzev

Institute for Applied Mathematics of the Far Eastern Branch of the Russian Academy of Sciences

Autor responsável pela correspondência
Email: guzev@iam.dvo.ru

академик РАН, директор

Rússia, Vladivostok

Vladimir Chudnovsk

Ilyichev Pacific Oceanological Institute of the Far Eastern Branch of the Russian Academy of Sciences

Email: vm53@mail.ru

доктор биологических наук, ведущий научный сотрудник

Rússia, Vladivostok

Ivan Abushkin

South Ural State Medical University

Email: ivanabushkin@mail.ru

доктор медицинских наук, профессор кафедры общей и детской хирургии

Rússia, Chelyabinsk

Bibliografia

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2. Fig. 1. Flooded jet of heated liquid propagating from the end of an optical fibre with a quartz diameter of 0.6 mm, on which a carbon layer absorbing laser radiation with a wavelength of 0.97 µm has been applied (illumination by green radiation from a pilot laser)

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3. Fig. 2. Shadow photo of flooded hot liquid jets inside the cuvette at laser powers of 7, 5, 3, and 1.5 W (top) and the position of the hot jet at different time points at 3 W (bottom)

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4. Fig. 3. Images of growth and collapse of a vapour bubble in the vicinity of the tip of an optical fibre placed in a glass tube

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5. Fig. 4. Dynamics of the vapour phase of the cavitation bubble and liquid flows

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6. Fig. 5. External view of venous malformation of the right foot of a 16-year-old patient

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7. Fig. 6. Echogram of the initial venous malformation of the right foot (top) and during intrathecal laser thermotherapy (bottom)

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8. Fig. 7. External appearance of the foot after intrathecal laser photocoagulation and fragment of the echogram of the pathological area

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9. Fig. 8. Radiographs of a 10-year-old child with an aneurysmal cyst of the proximal part of the left fibula

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10. Fig. 9. Bone radiograph of the left tibia (a) and its appearance two years after laser thermotherapy (b)

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11. Fig. 10. Necrosis of the skin flap on the anterior surface of the right tibia of a 12-year-old child after excision of an extensive melanocytic nevus (a) and the wound on the 6th day after necrotomy (b)

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12. Fig. 11. Wound 14 days after necratomy (a), after 9 sessions of laser cavitation on the day of plasty with a free dermatome perforated skin flap (b) and on the 6th day after skin plasty (c)

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13. Fig. 12. Ulcer of the left tibia of a 77-year-old patient at the time of admission (a), 20 days later and after 14 sessions of laser cavitation (b), with applied dermatome flaps on the day of skin grafting (c) and 5 months after discharge from hospital (d)

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14. Fig. 13. Purification of a purulent wound using laser cavitation in a tube placed in a cavity filled with physiological solution. 1 - medical laser; 2 - optical fibre; 3 - tube with inserted optical fibre

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