pertension, however, in ours and other people’s experience is outweighed by the advantage of operative closure of the defect at a time optimal for the surgeon. Data available on endocardial cushion defeet are scanty indeed and profiles of natural history are not available. Of the entire group, it would seem that the defect is partial (ostium pnimum atnial septal defect with or without a cleft i...

Analysis of velocity acceleration proximal to a regurgitant valve has been proposed as a method to quantify the regurgitant flow rate (Q.). Previous work has assumed inviscid flow through an infinitesimal orifice, predicting hemispheric isovelocity shells, with calculated flow rate given by QC=2rrN2vN, where VN is user-selected velocity of interest and rN is the distance from that velocity to t...

Malformations of the Penis Hypospadias is the most common malformation (1 in 250 live male births). It refers to the abnormal location of the distal urethral orifice along the ventral aspect of the penis. The urethral orifice is sometimes constricted, resulting in urinary tract obstruction. Epispadias: the urethral orifice is situated on the dorsal aspect of the penis. Like hypospadias, epispad...

This paper analyses the damping in pressure compensated closed centre mobile working hydraulic systems. Both rotational and linear loads are covered and the analysis applies to any type of pump controller. Only the outlet orifice in the directional valve will provide damping to a pressure compensated system. Design rules are proposed for how the system should be dimensioned in order to obtain a...

To cite: Naalla R, Prabhu R, Shenoy R, et al. BMJ Case Rep Published online: [please include Day Month Year] doi:10.1136/bcr-2014204822 DESCRIPTION A 35-year-old man presented with complete rectal prolapse which was irreducible for 2 days. He was diagnosed to have a rectal prolapse 6 years ago when he noticed a mass protruding through the anus. Initially, the mass protruded from the anus only a...

The flow field development through a simplified shock absorber orifice geometry is investigated using single phase Large Eddy Simulation. Hydraulic oil used as the working fluid with constant inlet velocity and an open top boundary to allow study focus on free shear layer in vicinity of main orifice. validated standard mixing dynamics. impact shape discussed regards initial growth, potential ap...

OBJECTIVES Proper valve selection is critical to ensure appropriate valve replacement for patients, because implantation of a small valve might place the patient at risk for persistent gradients. Labeled valve size is not the same as millimeter measure of prosthetic valve diameters or the annulus into which it will fit. Studies that use the labeled valve size in lieu of actual measured diameter...