The purpose of surgical treatment is radical (more than 60% of initial size of a scoliotic arch) correction of tortuosity
and spine stabilization; rising of functional reserves of respiratory system; elimination of implications of a functional spine inefficiency and outer defect of proportions of a body at the expense of increase of a trunk length, change of the thorax form; attaining of a trunk balance over sacrum.
The effective diffusion coefficient depends upon the properties of the porous medium, such as porosity and tortuosity
. In this case, the referred coefficient for porous medium is given by Eq.
In six patients, vessel tortuosity
prevented deployment of a Wingspan stent and so he used an Enterprise stent (Codman).
Out of many geometric features used by various authors in the literature[4,7], it is observed that there are five geometric features, namely, circularity, compactness, eccentricity, tortuosity
and length-width ratio, which provide better classification results.
The buddy wire technique is known to be useful for delivering stents when difficulties are encountered due to vessel tortuosity
or calcification during percutaneous coronary intervention (PCI) .
Thin fibrils are used to create more tortuosity
and surface area in a membrane, impacting the filtration efficiency.
Threshold ROP was defined according to the criteria of the U.S.-based Multicenter Trial of Cryotherapy for Retinopathy of Prematurity (CRYO-ROP) (13) (five or more contiguous or eight cumulative clock hours (30-degree sectors) of stage 3 in either zone I or II with plus disease (dilation and tortuosity
of the posterior retinal blood vessels)).
Aerobically active subjects exhibited more small-diameter vessels with less tortuosity
, or twisting, than the less active group, exhibiting a vessel pattern similar to younger adults.
Coating with XP8000 pigment show better pigment particle alignment, thus high tortuosity
. These results are supported by the air permeability and WVTR results.
The new formulation allows to study the effects of petrographic properties like porosity, tortuosity
, dispersivity on the dispersion phenomenon in general.
The term [L.sub.e]/L is the tortuosity
, while [([L.sub.e]/L).sup.2] is the tortuosity
factor that is used in making corrections for tortuosity
in problems involving both flow and diffusion in packed beds (Epstein, 1989).
Patients aged 70 and older have a higher rate of contraindicated anatomy for CAS, including problems in their aortic arch, lesion tortuosity
, and calcification, Dr.