Polycrystalline IR Fibers For Laser Scalpels

Alimpiev, S. S.; Artjushenko, V. G.; Butvina, Leonid N.; Vartapetov, S. K.; Dianov, E. M.; Kolesnikov, Yu. G.; Konov, V. I.; Nabatov, A. O.; Никифоров, С. М.; Mirakjan, M. M.

doi:10.1117/12.945275

Cited by 7 publications

(2 citation statements)

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“…Using the CO2 laser coupled to the laparoscope, one has to consider enormous losses of power transmission, defeating any attempts to obtain power and power density needed for precise and efficient cutting.3 In contrast, the currently available flexible optical systems do not completely satisfy the criteria for endoscopie surgical use because they are toxic, brittle, and hygroscopic, and they show either a low damage threshold or high transmission losses. [4][5][6][7] Recently, specially silvered coated plastic hollow waveguides made of Teflon® have been proposed as a delivery system for CO2 radiation.8-1 ! With their flexibility, nontoxicity, and ease of use, these waveguides could represent a valid alternative for transmitting the laser beam in operative laparoscopy.…”

Section: Introductionmentioning

confidence: 99%

Hollow Waveguides for CO₂ Laser Radiation in Operative Laparoscopy: An In Vitro Study

Cossmann¹,

Altermatt²,

Dreher³

et al. 1998

Journal of Gynecologic Surgery

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The purpose of this study was to compare the transmission and incision properties of two different CO2 laser radiation delivery systems: the Hopkins\s=r\CO2 laser laparoscope and the hollow waveguide, respectively, in view of a practical use of the latter in laparoscopic surgery. Using a CO2 gas flow rate of 4 L/min, the waveguide delivers CO2 laser power between 10 and 50 watts (W) to tissue with significantly less intensity loss than the laparoscope (9\p=n-\15% and 33\p=n-\40%, respectively). The laparoscope emits radiant energy with the most fundamental TEM00 mode. In contrast, because of loss of coherence and collimation, the output beam profiles of the waveguide is characterized by a quasi-top-hat function with sharp edges and hot spots randomly distributed over the beam. Histologie tissue analysis on fresh uterine tissue of the pig revealed significantly greater incision depths for lesions created with the waveguide, and no enlargement of tissue spot-size at higher power settings. The extent of thermal damage adjacent to the laser incision did not differ between the two delivery systems tested. In comparison to the Hopkins\s=r\laparoscope, the hollow waveguide delivers CO2 laser radiation with less absorption and without a "blooming" effect by the CO2 insufflation gas. These advantageous transmission properties render possible higher power and power density at tissue level, and thus a more precise and efficient cutting in the power range needed for most laparoscopic surgical applications. (

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Section: Introductionmentioning

confidence: 99%

Hollow Waveguides for CO₂ Laser Radiation in Operative Laparoscopy: An In Vitro Study

Cossmann¹,

Altermatt²,

Dreher³

et al. 1998

Journal of Gynecologic Surgery

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“…KRS-5 fibers, made of thallium bromoiodide, are also very toxic and easily damaged when brought into contact with tisme [4]. Other polycristalline fibers such as AgCl/ AgBr fibers [8,9] must be protected from exposure b UV-light. Further systems coming into consideration are polycrystalline alkali halide fibers made of KC1, NaCl, and KBr [lo]; these crystalline salts are hygroscopic and show a low damage threshold at 10.6 pm radiation.…”

Section: Introductionmentioning

confidence: 99%

Plastic hollow waveguides: Properties and possibilities as a flexible radiation delivery system for CO₂‐laser radiation

Cossmann¹,

Romano²,

Spörri³

et al. 1995

Lasers Surg Med

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Transmyocardial Laser Revascularisation: Are New Approaches with New Lasers Possible?

Ivanenko¹,

Hering²,

Klein³

et al. 1998

TMLR Management of Coronary Artery Diseases

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Polycrystalline IR Fibers For Laser Scalpels

Cited by 7 publications

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Hollow Waveguides for CO₂ Laser Radiation in Operative Laparoscopy: An In Vitro Study

Hollow Waveguides for CO₂ Laser Radiation in Operative Laparoscopy: An In Vitro Study

Plastic hollow waveguides: Properties and possibilities as a flexible radiation delivery system for CO₂‐laser radiation

Transmyocardial Laser Revascularisation: Are New Approaches with New Lasers Possible?

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Polycrystalline IR Fibers For Laser Scalpels

Cited by 7 publications

References 0 publications

Hollow Waveguides for CO2 Laser Radiation in Operative Laparoscopy: An In Vitro Study

Hollow Waveguides for CO2 Laser Radiation in Operative Laparoscopy: An In Vitro Study

Plastic hollow waveguides: Properties and possibilities as a flexible radiation delivery system for CO2‐laser radiation

Transmyocardial Laser Revascularisation: Are New Approaches with New Lasers Possible?

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Product

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Hollow Waveguides for CO₂ Laser Radiation in Operative Laparoscopy: An In Vitro Study

Hollow Waveguides for CO₂ Laser Radiation in Operative Laparoscopy: An In Vitro Study

Plastic hollow waveguides: Properties and possibilities as a flexible radiation delivery system for CO₂‐laser radiation