Buckling analysis of a microbeam embedded in an elastic medium with deformable boundary conditions

Micro & nano letters

article

Mustafa Özgür Yayli¹ 

[1] Faculty of Engineering, Department of Civil Engineering, Uludag University

关键词: buckling;    micromechanics;    beams (structures);    elastic deformation;    elasticity;    compressibility;    Fourier series;    buckling analysis;    elastically restrained embedded microbeam;    elastic medium;    deformable boundary conditions;    axial compression load;    winkler elastic foundation approach;    Fourier sine series;    microbeam deflections;    coefficient matrix;    Stokes transformation;   

DOI  :  10.1049/mnl.2016.0257

学科分类：计算机科学（综合）

来源: Wiley

【 摘 要 】

Citation: Singh R, Sharma R, Jain A, Sinha S, Samra T. Prevention of air embolism during hysteroscopy (Correspondence). Anaesth Pain & Intensive Care 2014;18(4):469-70 Air embolism is a potentially catastrophic complication of operative hysteroscopy. Its incidence varies from 10-50% depending on the detection method used but prevalence of subclinical embolism may be as high as 100%.1,2 We recently witnessed this complication in two patients and we briefly describe the preventive and therapeutic measures needed in such cases. Twenty eight year old, ASA PS 1 female was scheduled for hysteroscopic guided Copper–T (Cu-T) removal. She underwent the same procedure previously, which was unsuccessful as only one limb of the Cu-T could be removed. Routine monitors were attached and anaesthesia was induced with IV propofol and fentanyl followed by insertion of No. 3 Proseal™ laryngeal mask airway. Anaesthesia was maintained with spontaneous breathing of oxygen (O2), nitrous oxide (N2O) and sevoflurane. The patient was placed in lithotomy position with 20⁰ Trendelenburg position. Hysteroscopy was performed using normal saline pressurized by pressure infuser on 3 lit non-collapsible bottle. Cu-T was firmly embedded in the myometrium and removed after vigorous extraction following which the patient developed pulseless electrical activity (PEA), with no recordable EtCO2 and blood pressure. No heart sounds were heard but ECG showed sinus rhythm with heart rate of 90 bpm. Patient was immediately turned supine and administered 100% O2 after trachea was intubated. Cardiopulmonary resuscitation was done for 45 min but patient could not be revived.

【 授权许可】

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