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Chemical composition of surgical smoke formed in the abdominal cavity during laparoscopic cholecystectomy – Assessment of the risk to the patient

100%

Dobrogowski M. , Wesołowski W. , Kucharska M. , Sapota A. , Pomorski L.

nr 2

314-325

Objectives: The aim of this study was to assess the exposure of patients to organic substances produced and identified in surgical smoke formed in the abdominal cavity during laparoscopic cholecystectomy. Material and Methods: Identification of these substances in surgical smoke was performed by the use of gas chromatography-mass spectrometry (GC-MS) with selective ion monitoring (SIM). The selected biomarkers of exposure to surgical smoke included benzene, toluene, ethylbenzene and xylene. Their concentrations in the urine samples collected from each patient before and after the surgery were determined by SPME-GC/MS. Results: Qualitative analysis of the smoke produced during laparoscopic procedures revealed the presence of a wide variety of potentially toxic chemicals such as benzene, toluene, xylene, dioxins and other substances. The average concentrations of benzene and toluene in the urine of the patients who underwent laparoscopic cholecystectomy, in contrast to the other determined compounds, were significantly higher after the surgery than before it, which indicates that they were absorbed. Conclusions: The source of the compounds produced in the abdominal cavity during the surgery is tissue pyrolysis in the presence of carbon dioxide atmosphere. All patients undergoing laparoscopic procedures are at risk of absorbing and excreting smoke by-products. Exposure of the patient to emerging chemical compounds is usually a one-time and short-term incident, yet concentrations of benzene and toluene found in the urine were significantly higher after the surgery than before it.

Validation and quality assurance of arsenic determination in urine by GFAAS after toluene extraction

84%

Borosova D. , Mocak J. , Beinrohr E. , Miskovic P.

2002

tom 11

nr 6

This paper concerns quality assurance of arsenic determination in urine using the graphite furnace AAS method after toluene extraction. Obtained analytical results are used for validation and quality assurance purposes. The investigated urine samples were acquired from the workers of a large coal-fired Slovak power plant. In the proposed analytical method the following metrological characteristics were calculated: trueness, precision, recovery, the limit of detection and the limit of quantification. The method was satisfactorily used in the intercomparison test. The proposed method is suggested for utilisation in the assessment of occupational or environmental exposure to inorganic arsenic.

Chromatografia gazowa w analizie moczu i śliny na zawartość tiolaktonu homocysteiny

67%

Wieczorek M. , Piechocka J. , Głowacki R.

Analityka : nauka i praktyka

2021

tom nr 1

16--22

Najnowsze badania dostarczają przekonujących dowodów, że podczas oznaczania HTL w próbkach biologicznych technika GC MS może stanowić przydatne i precyzyjne narzędzie, konkurencyjne w stosunku do tych opartych na technikach separacji w fazie ciekłej.