PMC4976515_01
PMC4976515_02
PMC4976515_03
Changes in creatinine (Cr) levels according to period of exposure to organic solvents and lapse of time; Dots on the line indicate time points when Cr levels were measured. The first and second measurements of Cr levels were made in February 1997 and May 1999, when the patient was 38 and 40 years old, respectively. Cr levels were measured every 6-12 months after 1999, every 2 months starting in 2007 (when the patient was 48 years old), and every month starting in 2008 (when the patient was 49 years old)
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Fig1
As a result, we found that his serum Cr level rapidly increased from the period when he was exposed to dichloromethane for 4 years and 4 months (March 2005 to June 2009) (Fig. 1).
The Standard Test Method of Soil Contamination on TPH pretreatment by the Ministry of Environment of Korea (Ultrasound-Assisted Extraction method)
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Fig2
TPH analysis of soil that the patient performed was conducted according to the ultrasound-assisted extraction method of TPH in item number 18 of the Standard Test Method of Soil Contamination by the Ministry of Environment of Korea, and its schematic process is presented in Fig. 2. The patient reported 4-8 h of daily exposure and described symptoms of dizziness, headaches, and nausea during the pretreatment process.
Site of exposure reenactment (Two ultrasound-assisted extractors are located inside separate hood chamber). Measurement position a. In front of Extractor 1. Measurement position b. In front of Extractor 2. Measurement position c. Above the two Extractors
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Fig3
The work space of 'Room A', where the work was actually carried out at that time, was accurately restored and the process of ultrasound-assisted extraction using dichloromethane was reenacted repeatedly for about 2 h following the same method that the patient had actually performed (Fig. 3).