Infrared Spectroscopy on Smoke Produced by Cauterization of Animal Tissue

Gianella, Michele; Sigrist, Markus W.

doi:10.3390/s100402694

Cited by 17 publications

(12 citation statements)

References 23 publications

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“…The spectra of surgical smoke samples measured with the MIR DFG spectrometer were similar in composition to smoke samples produced in the laboratory on animal tissue in an earlier study [56], where water vapor, methane, ethane and ethylene were the only detected compounds. Methane, ethane and ethylene are relatively harmless, with recommended exposure limits (REL) of 1% [57].…”

Section: Discussionsupporting

confidence: 62%

Chemical analysis of surgical smoke by infrared laser spectroscopy

Gianella

Sigrist

2012

Appl. Phys. B

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The chemical composition of surgical smoke, a gaseous by-product of some surgical devices-lasers, drills, vessel sealing devices-is of great interest due to the many toxic components that have been found to date. For the first time, surgical smoke samples collected during routine keyhole surgery were analyzed with infrared laser spectroscopy. Traces (ppm range) of methane, ethane, ethylene, carbon monoxide and sevoflurane were detected in the samples which consisted mostly of carbon dioxide and water vapor. Except for the anaesthetic sevoflurane, none of the compounds were present at dangerous concentrations. Negative effects on the health of operation room personnel can be excluded for many toxic compounds found in earlier studies, since their concentrations are below recommended exposure limits.

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Section: Discussionsupporting

confidence: 62%

Chemical analysis of surgical smoke by infrared laser spectroscopy

Gianella

Sigrist

2012

Appl. Phys. B

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“…A model that explains the method is given below. According to the Lambert-Beer law [26]:

I = I_{0} exp (- K C^{n} L)

where I and I O , correspond to the light at the response channel and reference channel, respectively; K and L are constants denoting the scale factor and gas incident process, respectively; and n is a correction constant.…”

Section: Principlesmentioning

confidence: 99%

Development of an Optical Gas Leak Sensor for Detecting Ethylene, Dimethyl Ether and Methane

Tan

Pei

Zhu³

et al. 2013

Sensors

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In this paper, we present an approach to develop an optical gas leak sensor that can be used to measure ethylene, dimethyl ether, and methane. The sensor is designed based on the principles of IR absorption spectrum detection, and comprises two crossed elliptical surfaces with a folded reflection-type optical path. We first analyze the optical path and the use of this structure to design a miniature gas sensor. The proposed sensor includes two detectors (one to acquire the reference signal and the other for the response signal), the light source, and the filter, all of which are integrated in a miniature gold-plated chamber. We also designed a signal detection device to extract the sensor signal and a microprocessor to calculate and control the entire process. The produced sensor prototype had an accuracy of ±0.05%. Experiments which simulate the transportation of hazardous chemicals demonstrated that the developed sensor exhibited a good dynamic response and adequately met technical requirements.

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“…Several important advances are made in this area beginning in the 1930s, and the research into a wide range of applications continues to the present days [1][2][3][4][5][6]. Investigations show that MPCs have been widely used in varies areas, including environmental monitoring [4][5][6], combustion processes [7], medical diagnostics [8], and fundamental atomic and molecular physics [9,10].…”

Section: Introductionmentioning

confidence: 99%

Direct high-precision measurement of the effective optical path length of multi-pass cell with optical frequency domain reflectometer

Gao

Cao

2016

Opt. Express

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Multi-pass cells (MPCs) are commonly used in trace-gas detection and weak spectrum measurement. It is essential to accomplish a high-precision measurement of MPCs' effective optical path length (EOPL). A direct high-precision measuring method of MPCs' EOPL with optical frequency domain reflectometer (OFDR) was reported and demonstrated in this paper. Several important parameters of a MPC, such as EOPL and base length, were derived with high-precision by identifying the complicated signal of OFDR. The MPC's EOPL was also verified with the prevailing absorbance method. The results showed that the MPC's EOPL measured by each of these two methods is highly consistent. However, the relative uncertainty with the OFDR dramatically decreased 2 orders of magnitude (about 0.0085%) than that with the absorbance method. It demonstrated that the OFDR method with fewer measurement links is more conducive to a direct measurement. The performances of beam spread and stray light in the White-cell were also evaluated with the method.

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Infrared Spectroscopy on Smoke Produced by Cauterization of Animal Tissue

Cited by 17 publications

References 23 publications

Chemical analysis of surgical smoke by infrared laser spectroscopy

Chemical analysis of surgical smoke by infrared laser spectroscopy

Development of an Optical Gas Leak Sensor for Detecting Ethylene, Dimethyl Ether and Methane

Direct high-precision measurement of the effective optical path length of multi-pass cell with optical frequency domain reflectometer

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