TAPSE, pulsed or tissue Doppler derived RV MPI, peak systolic tricuspid annular velocity
, fractional area change and RV dP/dt have been recently proposed as tools for assessment of RV systolic function (3).
m] = ratio of early transmitral to early mitral annular velocity
Tissue Doppler parameters were measured: early diastolic mitral annular velocity
(Em) and late diastolic mitral velocity (Am).
The effectiveness of mud in removing the cuttings from the hole depends on several factors such as fluid viscoelastic properties, annular velocity
, angle of inclination, drilled cuttings size and their shape.
The volume includes equations for problems such as mud weight, hydrostatic pressure, pressure gradients, annular velocity
, control drilling, and circulating hydraulic horsepower.
While standard oil field drilling uses annular velocity
(speed the fluid travels outside the drill pipe and inside the well bore) to help lift the solids, the HDD drilling crews have to substantially increase the viscosity over that in the oil field to achieve the same carrying capacity due to the larger diameter holes being drilled horizontally.
If it shows that the ratio of peak early mitral inflow velocity to peak late diastolic mitral annular velocity
is shortened and deceleration time in the left ventricle is less than 150 milliseconds, then we know that the patient has the increased left ventricular stiffness and very high filling pressures that are indicative of diastolic dysfunction.
All formulas and calculations are presented in easy-to-use, step-by-step order, virtually all the mathematics required out on the drilling rig is here in one convenient source, including formulas for pressure gradient, specific gravity, pump output, annular velocity
, buoyancy factor, volume and stroke, slug weight, drill string design, cementing, depth of washout, bulk density of cuttings, and stuck pipe.
With this modality, the values recorded were the early (Em) and late (Am) diastolic mitral annular velocity
, and the ratio of Em/Am (28).
ae] around the drill collars and around the drillpipe Average effective annular velocity
is the mud velocity which produces the viscous drag component of surge or swab pressure and its frame of references is the wellbore wall.
A mean systolic annular velocity
below 9 cm/sec at four sites measured from the apex had an 87% sensitivity and 97% specificity for pathologic hypertrophy.
The only way to ensure that this happens is with the proper mix of drilling fluids delivered with the annular velocity
to force cuttings out of the bore hole.