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Pressure wave focusing effects following laser medical procedures in human eyes
Horvat, Darja (Author), Požar, Tomaž (Author), Starman, Bojan (Author), Halilovič, Miroslav (Author), Petkovšek, Rok (Author)

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Abstract
Comparative analysis of pressure wave propagation, following laser-induced ablation of the human cornea, was performed. Evolution of the pressure field as well as temporal and spatial dependencies of the transient pressure amplitudes created at various input laser parameters, corresponding to different typical procedures of laser eye surgery, is presented comprehensively. The computations were performed with the next generation of the acoustic eye model, previously validated against existing measurements. The analysis allows the assessment of potentially problematic regions within the eye where the resultant positive and/or negative pressure may exceed values which are considered safe for the patient.

Language:English
Keywords:shock waves, photoablation, laser ultrasonics, cavitation, acoustic focusing, negative pressure
Work type:Article (dk_c)
Tipology:1.01 - Original Scientific Article
Organization:FS - Faculty of Mechanical Engineering
Year:2020
Number of pages:str. 1-9
Numbering:Vol. 126, iss. 6
UDC:519.6:615.849.7(045)
ISSN on article:0947-8396
DOI:10.1007/s00339-020-03539-w Link is opened in a new window
COBISS.SI-ID:15652611 Link is opened in a new window
Views:268
Downloads:235
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Record is a part of a journal

Title:Applied physics
Shortened title:Appl. phys., A, Mater. sci. process.
Publisher:Springer
ISSN:0947-8396
COBISS.SI-ID:14196007 This link opens in a new window

Document is financed by a project

Funder:ARRS - Agencija za raziskovalno dejavnost Republike Slovenije (ARRS)
Project no.:P2-0270
Name:Proizvodni sistemi, laserske tehnologije in spajanje materialov

Funder:ARRS - Agencija za raziskovalno dejavnost Republike Slovenije (ARRS)
Project no.:P2-0392
Name:Optodinamika

Funder:ARRS - Agencija za raziskovalno dejavnost Republike Slovenije (ARRS)
Project no.:P2-0263
Name:Mehanika v tehniki

Funder:ARRS - Agencija za raziskovalno dejavnost Republike Slovenije (ARRS)
Project no.:L2-9254
Name:Prostorsko in časovno oblikovanje laserske svetlobe za minimalno invazivne oftalmološke posege

Secondary language

Language:Slovenian
Title:Učinki fokusiranja tlačnega vala po laserskih medicinskih postopkih v človeških očeh
Abstract:
Izvedena je bila primerjalna analiza širjenja tlačnega vala po laserski ablaciji človeške roženice. Izčrpno je predstavljeno širjenje tlačnega polja ter časovne in prostorske odvisnosti amplitud tlaka, ustvarjenih z različnimi vhodnimi laserskimi parametrih, ki ustrezajo različnim značilnim postopkom laserskih operacij oči. Izračuni so bili izvedeni z naslednjo generacijo akustičnega modela očesa, predhodno potrjenim z naslombo na obstoječe meritve. Analiza omogoča oceno potencialno problematičnih področij v očesu, kjer lahko pozitivni in/ali negativni tlak preseže vrednosti, ki veljajo za varne za pacienta.

Keywords:udarni valovi, fotoablacija, laserski ultrazvok, kavitacija, akustično fokusiranje, negativni tlak

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