Effects of Laser Sources (Argon, Nd:YAG, CO<sub>2</sub>) on the Elastic Resistance of the Vessel Wall: Histological and Physical Study

Va, Fasano; Ponzio, R. M.; Benech, Franco; Sicuro, M.

doi:10.1002/lsm.1900030108

Cited by 16 publications

(4 citation statements)

References 3 publications

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“…Fasano, et al, 6 have found that all three lasers have almost identical effects on vessel elastance. which corroborates that of Dew, 5 using argon, C02, and Nd:YAG microsurgical lasers to perform microvascular anastomoses, reveals no significant qualitative difference in the tissue welds produced by these lasers.…”

Section: Lasers In Neurological Surgerymentioning

confidence: 95%

Lasers in Neurological Surgery

1984

Journal of Neurosurgery

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Section: Lasers In Neurological Surgerymentioning

confidence: 95%

Lasers in Neurological Surgery

1984

Journal of Neurosurgery

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“…filled with fibrin plugs. The tunica media and adventitia show extensive coagulation necrosis, the extent and depth of the necrotic zone being influenced by the type of laser used [7], For example, using a low-output CO2 laser, Oishi [8] was able to obtain a sufficient laserwelded anastomosis by coagulating only the tunica me dia and adventitia without damaging the intima. The vessel size does not seem to be a limiting factor: vascular structures of 4-5 mm in diameter can be laser-bonded without an apparent increase in complications [9].…”

Section: Discussionmentioning

confidence: 99%

Bursting Strength of the Rat Aorta: Comparison of Suture and Laser Anastomoses

Burger¹,

Gerharz²,

Seitzmayer³

et al. 1991

Urol Int

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The bursting strength of sutured and laser-welded vascular anastomoses were assessed in a rat aorta model. Postoperative investigations included postmortems, light and scanning electron microscopy and measurements of bursting strength at set intervals (30 min, 3, 14 and 28 days postoperatively, p.o.). Laser-bonded anastomoses consistently demonstrated lower bursting strengths than suture controls, with statistically significant differences at 30 min and 3 days p.o. (p < 0.01). Laser anastomosis was easier and faster to perform, the foreign body reaction was markedly lower than in sutured controls. Formation of aneurysms was not observed.

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“…It is known that protein denaturation causes changes in stiffness of the HIFU lesion compared to the surrounding soft tissue (Fasano et al 1983, Consigny et al 1989, Sapin-de Brosses et al 2010). Therefore, axial strain elastography was proposed as a possible technique to visualize HIFU lesion (Stafford et al 1998).…”

Section: Introductionmentioning

confidence: 99%

Visualization of HIFU-Induced Lesion Boundaries by Axial-Shear Strain Elastography: A Feasibility Study

Thittai¹,

Galaz²,

Ophir³

2011

Ultrasound in Medicine & Biology

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In this paper, we report on a study that investigated the feasibility of reliably visualizing highintensity focused ultrasound (HIFU) lesion boundaries using axial-shear strain elastograms (ASSE). The HIFU-induced lesion cases used in the present work were selected from data acquired in a previous study. The samples consisted of excised canine livers with thermal lesions produced by an MR-compatible HIFU system (GE Medical System, Milwaukee, WI) and were cast in a gelatin block for elastographic experiment. Both single and multiple HIFU-lesion samples were investigated. For each of the single lesion sample, the lesion boundaries were determined independently from the axial strain elastogram (ASE) and ASSE at various isointensity contour thresholds (from −2dB to −6dB), and the area of the enclosed lesion was computed. For samples with multiple lesions, the corresponding ASSE was analyzed for identifying any unique axial-shear strain zones of interest. We further performed Finite Element Modeling (FEM) of simple two inclusion cases to verify if the in-vitro ASSE obtained were reasonable. The results show that the estimation of the lesion area using ASSE is less sensitive to iso-intensity threshold selection-making this method more robust compared to ASE-based method. For multiple lesion case, it was shown that ASSE enables high-contrast visualization of a 'thin' untreated region in between multiple fully-treated HIFU-lesions. This contrast visualization was also noticed in the FEM predictions. In summary, the results demonstrate that it is feasible to reliably visualize HIFU lesion boundaries using ASSE.

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Effects of Laser Sources (Argon, Nd:YAG, CO₂) on the Elastic Resistance of the Vessel Wall: Histological and Physical Study

Cited by 16 publications

References 3 publications

Lasers in Neurological Surgery

Lasers in Neurological Surgery

Bursting Strength of the Rat Aorta: Comparison of Suture and Laser Anastomoses

Visualization of HIFU-Induced Lesion Boundaries by Axial-Shear Strain Elastography: A Feasibility Study

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Effects of Laser Sources (Argon, Nd:YAG, CO2) on the Elastic Resistance of the Vessel Wall: Histological and Physical Study

Cited by 16 publications

References 3 publications

Lasers in Neurological Surgery

Lasers in Neurological Surgery

Bursting Strength of the Rat Aorta: Comparison of Suture and Laser Anastomoses

Visualization of HIFU-Induced Lesion Boundaries by Axial-Shear Strain Elastography: A Feasibility Study

Contact Info

Product

Resources

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Effects of Laser Sources (Argon, Nd:YAG, CO₂) on the Elastic Resistance of the Vessel Wall: Histological and Physical Study