The optothermoacoustic focusing element was suggested in [1]. This element can create a great local stress in a special shaped area inside the matter. Is it possible to use this technique for surgical operation upon internals without cutting the upper body tissues? In principle, this method gives the possibility to reproduce action of the scalpel or the other surgical armaments.
1.https://www.researchgate.net/publication/323265610_Method_for_internal_cracks_inhibition_in_constructions_Russian_Patent_N_1749250?_sg=jv6ZIu8PyGP0bJcJdAgpiMZ6nSVPMuFTlHA-jWMTXiepATYTEeo_81Y2dm8StltP2pRV4oIQ0d9cQPenEJ6ZTO5nNn72ZpSooQHRF1Zq.zo7ErjLgA5TC4VceGECugMf0URWm0twC6gQfWcDlNPmigbeSQHgbycGqrXVLQJq40WqWpGtfYARnJ6622Pn7BQ
Dear Anatoly, I
completely agree with you. Please my new article in GR is attached Sad news. Anry Amrosivich Ruchadze died one day ago. The parting procedure will take place on Monday in 11-00 in General Physics Institute in Moscow. Sincerely, Alexander.
Dear Alexander,
I know that G. A. Askar'yan had plans to use the optothermoacoustic focusing element in medicine for destroing
gall-stones. Were these plans realized?
Yours Anatoly
G.A. Askar'yan with collaborators pablished the experimental results (1,2), in which a power ultrasonic pulse is generated at the spherical surface and focused into a focal point. Contrary to this in our patent (3) a power ultrasonic pulse is generated at the complicated shaped surface. So, it can be focused into the area of any shape. Here the use of achromatic optical element (4) is fundamentally because the use of diffractive optical element for a single-cycle ultrasonic pulse is impossible.
1. Askar'yan, G. A., & Klebanov, L. D. (1988). Focusing and cumulation of optothermoacoustic shock pulses by a concave surface heated by a laser pulse. Soviet Journal of Quantum Electronics, 18(11), 1359.
2.https://www.researchgate.net/publication/257327167_Generation_of_intense_ultrasonic_pulses_by_planar_or_concave_focusing_surface_exploded_by_a_current_or_by_a_laser_beam
3.https://www.researchgate.net/publication/323265610_Method_for_internal_cracks_inhibition_in_constructions_Russian_Patent_N_1749250
4.https://www.researchgate.net/publication/6726807_Achromatic_optical_elements
Two options can be used for simulating of the scalpel or the other surgical armaments movement inside the body. In the first one the optothermoacoustic focusing element is moving along the patient’s body. The element should be connected with the body through some immersion. In the second option the optothermoacoustic focusing element is elongated along the way of the scalpel movement and the laser beam is moving along the element.
I suppose that this technics can be used for simulation of a bandage to stop a wound for internal hemorrhage.
I3 degrees Celsiusf you already have such a setup running for technical purposes, you might do some simple experiments with a ballistic gell filled tissue phantom to see whether you indeed can cut at a certain depth, without damaging the "tisThesue" in between. According to the international standard IEC 60601-1 the heating of the skin surfcae should not exceed 4
Dear Fokko, I do not understand what means "I3 degrees Celsiusf".
Dear Fokko, Before, the experimental setup was in the laboratory of G.A. Askar’yan. Now it is not exist as Askar'yn passed away and his collaborators Alexander Yurkin and Leonid Klebanov now are working in other field. I hope that anybody will be interested to develop this direction. Your comment seems to be very useful, specially your remark concerning the skin heating. I am far from medicine and appreciate such information.
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