Category: V

The point in the medulla oblongata close to the floor of the fourth ventricle, the puncture of which causes instant death owing to destruction of the respiratory center.  

In patients receiving mechanical ventilation, a new and persistent infiltrate seen on chest x-ray associated with fever, elevated or depressed white blood cell counts, and sputum that is either purulent or full of disease-causing bacteria.  

A closed tube for maintaining patency of the vagina following operation for fistula.  

The flat portion of the record of intraventricular pressure during the end of the ejection phase of ventricular systole.  

Any body plane perpendicular to a horizontal plane.  

A placenta in which the chorion forms villi.  

A placenta with the umbilical cord attached to the membrane a short distance from the placenta, the vessels entering the placenta at its margin.  

A light-absorbing compound in the photoreceptor cells of the retina that converts light energy into a nerve impulse that is passed from the receptor cells to the optic nerve.  

Paralysis of the vasomotor centers, resulting in lack of tone and dilation of the blood vessels.  

Papilloma with thin, long excrescences present in the urinary bladder, breast, intestinal tract, or choroid plexus of the cerebral ventricles.