Removal of the connector on the laryngeal mask airway provides a useful alternative to the intubating laryngeal mask
摘要:
Purpose: We describe two cases in which fiberoptic intubation through the standard laryngeal mask airway (LMA) was successful with large-bore tracheal tubes (TTs) when an intubating LMA (ILMA) could not be used.Clinical features: Patient #, with obstructive sleep apnea, underwent elective surgical repair. His mouth opening was just under 25 mm, but difficult intubation was not anticipated. We induced general anesthesia, easily ventilated the patient by mask, and established neuromuscular blockade. Direct laryngoscopy and attempts to insert either a #5 or a #4 ILMA into the mouth failed. A standard #4 LMA, with the connector removed, was inserted, through which a 7.0 mm nasal RAE (TM) TT; fiberoptically guided, passed into the trachea at the first attempt. Patient #2, with a loosened implant after left hip arthroplasty, underwent revision prosthesis. Her neck movement was limited. We thus planned awake securing of the airway, but the patient refused. We induced anesthesia and established bag-mask-valve ventilation. The limited neck movement prevented direct laryngoscopy. Visualizing the laryngeal inlet with the fiberoptic bronchoscope (FOB) proved impossible as bloody secretions obscured the FOB's tip. Ventilation by mask was easy. As an ILMA was not available, we removed a #5 LMA's connector and passed an 8.0 mm nasal RAE (TM) TT through the LMA. fiberoptic-guided intubation was easy, In both cases, the remainder of the intraoperative course was uneventful.Conclusion: A standard LMA whose connector has been removed to allow passage of TTs of >6.0 mm internal diameter may be substituted for the ILMA when necessary.
使用 N , N'-二 丁基 -N , N , N ', N' - N'- 四甲基-乙二胺四氢硼酸酯( BTMETB )或 轻度和非水条件, 可以轻松地从相应的烷基卤化物和酰基卤化物以高收率制备各种对称的二烷基二酰基和二酰基二硫化物。 N , N'- 二苄基 -N , N , N ', N'- 四甲基 硼酸四氢硼酸铵( BZTMETB )和元素硫。通过在室温下用硼氢化钠的碱性溶液处理相应的氯化季铵或溴化季铵,可以轻松制备季铵化硼氢化物。
Aroyl disulfides as promoter-modifiers for copolymerization of butadiene and styrene
作者:Robert L. Frank、James R. Blegen、Archie Deutschman
DOI:10.1002/pol.1948.120030108
日期:1948.2
veratroyl, p-bromobenzoyl, p-phenylbenzoyl, p-benzoylbenzoyl, p-methylsulfonylbenzoyl, p(N,N-dimethylsulfonamido)-benzoyl and -naphthoyl disulfides are promoters of the emulsion copolymerization of butadiene and styrene, but exhibit little effect on the polymer properties. Furoyl, phenyl, p-chlorophenyl and p-bromophenyl disulfides are neither promoters nor modifiers.
Diacyl Disulfide: A Reagent for Chemoselective Acylation of Phenols Enabled by 4-(<i>N</i>,<i>N</i>-Dimethylamino)pyridine Catalysis
作者:Hong-Xin Liu、Ya-Qian Dang、Yun-Fei Yuan、Zhi-Fang Xu、Sheng-Xiang Qiu、Hai-Bo Tan
DOI:10.1021/acs.orglett.6b02818
日期:2016.11.4
A general and excellent acylation reagent, diacyl disulfide, was uncovered for efficient ester formation enabled by DMAP (4-(N,N-dimethylamino)pyridine) catalysis. This protocol offered a promising synthetic platform on site-selective acylation of phenolic and primary aliphatic hydroxyl groups, which greatly expanded the realm of protecting group chemistry. The importance of the reagent was also reflected
PROCESS FOR PRODUCING POLYMER TERMINATED WITH OPTIONALLY PROTECTED FUNCTIONAL GROUP
申请人:KURARAY Co. LTD.
公开号:EP0704460A1
公开(公告)日:1996-04-03
A process for producing polymers having terminal functional group which may be protected, comprises polymerizing a radical-polymerizable monomer with a polymerization initiator comprising at least one member selected from the group (A) consisting of thio-S-carboxylic acids represented by the following general formula (1) and dithiocarboxylic acids represented by the following general formula (2) and at least one member selected from the group (B) consisting of polysulfides represented by the following general formula (3), polysulfides represented by the following general formula (4) and sulfoxides:
wherein R¹ represents a hydrocarbon group which may have a substituent including functional group;
wherein R² represents a hydrocarbon group which may have a substituent including functional group;
wherein R³ and R⁴ each represents a hydrocarbon group which may have a substituent including functional group and n is an integer of 2 or more; and
R⁵- (S)m- R⁶ (4)
wherein R⁵ and R⁶ each represents a hydrocarbon group having a functional group and m is an integer of 2 or more. This process can produce polymers with which functional groups have been introduced into one end or both ends thereof, irrespective of the rate of polymerization or the degree of polymerization of the polymer that forms.
COMPOSITION AND METHOD FOR TEMPORARILY FIXING SOLID
申请人:JSR Corporation
公开号:EP1522567A1
公开(公告)日:2005-04-13
The present invention relates to a method of temporarily and firmly fixing two solids to each other and to a composition used in the method, which is a method of temporarily fixing, comprising temporarily fixing the two solids to each other with a liquid crystal compound or a composition comprising the liquid crystal compound. This method is used for a method of temporarily fixing a pad for chemical mechanical polishing, for example, to polish a wafer for a semiconductor device fixed on a surface of a base plate, when one solid is a pad for chemical mechanical polishing of a wafer for a semiconductor device and the other is a base plate to fix the pad.
Composition and method for temporarily fixing solid
申请人:——
公开号:US20040185187A1
公开(公告)日:2004-09-23
The present invention relates to a method of temporarily and firmly fixing two solids to each other and to a composition used in the method, which is a method of temporarily fixing, comprising temporarily fixing the two solids to each other with a liquid crystal compound or a composition comprising the liquid crystal compound. This method is used for a method of temporarily fixing a pad for chemical mechanical polishing, for example, to polish a wafer for a semiconductor device fixed on a surface of a base plate, when one solid is a pad for chemical mechanical polishing of a wafer for a semiconductor device and the other is a base plate to fix the pad.