Air leak seal for lung dissection plane with diode laser irradiation: an ex vivo study

Gotoh, Maya; Tokunaga, H.; Kaneko, Kenji; Arai, Tsunenori

doi:10.1117/12.701476

Cited by 2 publications

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“…We propose a novel laser treatment, which was used with diode laser (wavelength: 810nm) irradiation and Indocyanine green (ICG, absorption peak wavelength: 805nm) vital staining. We have previously reported that this laser sealing method demonstrated successful lung sealing [3]. Achieving stable vital staining is complicated and made more difficult by moisture content and bleeding on the lung surface.…”

Section: Introductionmentioning

confidence: 98%

Absorption Characteristics Evaluation from Pulsed Photo-thermal Radiometry in the Determination of Lung Air-leak Integrity by Vital Staining

Tokunaga

Gotoh

Oka

et al. 2007

2007 29th Annual International Conference of the IEEE Engineering in Medicine and Biology Society

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We evaluated the absorption characteristics of the lung surface with vital staining non-invasively by means of pulsed photo thermal radiometry (PPTR) to improve the success rate of laser air leak sealing from the lung. To seal the air leak after lung resection, we investigated laser treatment using diode laser irradiation (wavelength: 810nm) and vital staining with Indocyanine green (ICG, absorption peak wavelength: 805nm). We used mu a square root alpha and defined as A(mu a: the absorption coefficient, alpha: the thermal diffusivity) in the approximate PPTR theory to analyze the PPTR signal as it was assumed the thermal diffusivity coefficient would be a constant when the lung collapsed during surgery. The accuracy of the constructed PPTR system with this assumption was A= +/-0.15s -1/2. In ex vivo studies, the measured A variation due to vital staining was 3.7s -1/2. This range was sufficiently large measured against the accuracy. We monitored the condition of the lung surface during continuous diode laser irradiation with our PPTR system. We successfully measured the absorption characteristic changes during laser irradiation. We believe this constructed PPTR system might be useful in improving the success rate of laser sealing with vital staining while arranging the laser energy by the value of A.

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Section: Introductionmentioning

confidence: 98%

Absorption Characteristics Evaluation from Pulsed Photo-thermal Radiometry in the Determination of Lung Air-leak Integrity by Vital Staining

Tokunaga

Gotoh

Oka

et al. 2007

2007 29th Annual International Conference of the IEEE Engineering in Medicine and Biology Society

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“…[1] . The lasers commonly used in these fields are CO 2 laser [2,3] , He-Ne laser, argon ion laser [4] , excimer laser [5] , ruby laser, Nd:YAG laser [4] , Ho:YAG laser, Er:YAG laser, KTP laser, Q-switched Nd:YAG laser [6,7] , diode laser [2] , etc.…”

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confidence: 99%

Light intensity distribution of a new type of contact laser scalpel

et al. 2008

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The emergent light distribution of a new type of contact laser scalpel is measured in three different states using a light sensor. The relationship between the angle and the light intensity is analyzed. The results show that the strongest light is emitted from two sides and the front of the scalpel. The light from the front mainly plays a role of cutting. The light from two sides contributes to stanch the wound so as to remain a clear visual field during the surgery. It also helps to increase the cutting efficiency.

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Air leak seal for lung dissection plane with diode laser irradiation: an ex vivo study

Cited by 2 publications

References 0 publications

Absorption Characteristics Evaluation from Pulsed Photo-thermal Radiometry in the Determination of Lung Air-leak Integrity by Vital Staining

Absorption Characteristics Evaluation from Pulsed Photo-thermal Radiometry in the Determination of Lung Air-leak Integrity by Vital Staining

Light intensity distribution of a new type of contact laser scalpel

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