4 research outputs found
Broad subcutaneous emphysema with airway obstruction during robotâassisted partial nephrectomy: A case report and literature review
Introduction Subcutaneous emphysema is a relatively common complication in laparoscopic surgery. However, airway obstruction secondary to subcutaneous emphysema is rare. Case presentation A 63âyearâold woman with a 56âmm left renal tumor underwent a robotâassisted partial nephrectomy. The operative time was 155âmin, the insufflation time was 108âmin, and the estimated blood loss was 70âmL. The pneumoperitoneum pressure was maintained at 12âmmHg, except at 15âmmHg for 19âmin during tumor resection. The endâtidal CO2 was <47âmmHg throughout the procedure. Postoperatively, broad subcutaneous emphysema from the thigh to the eyelid was observed. Computed tomography revealed airway obstruction, and extubation was aborted. On postoperative day 1, emphysema around the trachea and neck improved and the intubation tube was successfully removed. Conclusion Both laryngeal emphysema and physical compression secondary to emphysema can cause airway obstruction. To reduce gasârelated complications, the risk of developing subcutaneous emphysema should be properly assessed during robotâassisted laparoscopic surgery
Emission Sources and their Contribution to Indoor Air Pollution by Carbonyl Compounds in a School and a Residential Building in Shizuoka, Japan
Identification of Novel Phosphorus-Based Flame Retardants in Curtains Purchased in Japan Using Orbitrap Mass Spectrometry
An
analytical method was developed for screening and identifying
novel flame retardants in curtains purchased in Japan in 2014 by use
of a liquid chromatograph interfaced with a hybrid quadrupole Orbitrap
mass spectrometer (LCâOrbitrap-MS; Q Exactive Plus). To enable
complete extraction of flame retardants in curtains, we used an extraction
method developed earlier, in which a solvent mixture of 1,1,1,3,3,3-hexafluoro-2-propanol/chloroform
(1:4, v/v) was used to completely dissolve the curtain matrix. An
initial gas chromatographyâMS scan analysis confirmed the presence
of several unidentified flame retardants in curtains. We then determined
the precise masses of the detected compounds by use of a LCâOrbitrap-MS
and used that information to construct chemical formula of the detected
compounds. The MAGMa online spectral data annotation was then used
to generate a list of candidate compounds. For the determination and
confirmation of the chemical structures of the candidate compounds,
we reviewed the literature and acquired standards and compared mass
fragment patterns of the most probable candidate compounds with those
of standards. We unequivocally identified the compounds in curtain
samples as (5-ethyl-2-methyl-2-oxido-1,3,2-dioxaphosphorinan-5-yl)Âmethyl-methyl-methylphosphonate
(PMMMP), naphthalen-2-yl diphenyl phosphate (NDPhP), and 6-benzyl
benzoÂ[<i>c</i>]Â[2,1]Âbenzoxaphosphinine 6-oxide (BzlDOPO).
This study elucidates the occurrence of three novel phosphorus-based
flame retardants in curtains, and the technique we proposed here can
be applied for the detection of environmental chemicals in other products