44. Tracheotomy for Croup. Impossibility of Removing the Tube even after Sixteen Months

Using Pericardium Allograft in Closing Tracheal Fistula after Removing Tracheotomy Tube

Using Pericardium Allograft in Closing Tracheal Fistula after Removing Tracheotomy Tube

Tracheotomy is used to keep and control airways open and protect them in head and neck operations.1-3 Tracheotomy is opening a direct airway through an incision in the trachea observed as a stoma in the lower throat and it is usually performed in serious head and neck traumas, tumors, bleedings and cases that intubation with endotracheal tube is not possible. This method has several advantages ...

using pericardium allograft in closing tracheal fistula after removing tracheotomy tube

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Removing even crossings

An edge in a drawing of a graph is called even if it intersects every other edge of the graph an even number of times. Pach and Tóth proved that a graph can always be redrawn such that its even edges are not involved in any intersections. We give a new, and significantly simpler, proof of a slightly stronger statement. We show two applications of this strengthened result: an easy proof of a the...

Removing Independently Even Crossings

We show that cr(G) ≤ (2 iocr(G) 2 ) settling an open problem of Pach and Tóth [5,1]. Moreover, iocr(G) = cr(G) if iocr(G) ≤ 2.