dilation


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Related to dilation: Cervical dilation

dilation

[də′lā·shən]
(mathematics)
A transformation which changes the size, and only the size, of a geometric figure.
An operation that provides a relatively flexible boundary to a fuzzy set; for a fuzzy set A with membership function mA, a dilation of A is a fuzzy set whose membership function has the value [mA (x)]βfor every element x, where β is a fixed number that is greater than 0 and less than 1.
(science and technology)
The act or process of stretching or expanding.
References in periodicals archive ?
Based on Product, Balloon Sinus Dilation Devices segment accounted for considerable market share during the forecast period due to rising occurrence of chronic sinusitis and adoption of balloon sinuplasty procedures.
Some mums-to-be sniffed that the only chart they had time for during labour was one laying down a rule they must be rewarded with ever-larger chocolate eggs at each stage of dilation.
A newly published article in Lancet Gastroenterology & Hepatology entitled "Optimal dilation time for combined small endoscopic sphincterotomy and balloon dilation for common bile duct stones: a multicentre, single-blinded, randomised controlled trial" assessed the optimal duration of dilation for combined EST and EPBD for the removal of common bile duct stones (7).
60% with dilation alone and 100% with dilation combined with intralesional corticosteroid injection.
Throughout the hearing the three judges asked questions around how to best interpret a Eleventh Circuit Court of Appeals ruling that blocked Alabama's dilation and evacuation ban from going into effect; how the injections work; and who are the women likely to need these services.
Balloon catheter dilation has been described as an excellent tool in the treatment of chronic rhinosinusitis.
Compared to mechanical dilation or surgical intervention, these cause a gradual softening and dilation of the cervix, with a reduced risk of stretch injuries or perforation, thus providing the advantage of slowly increasing the cervical diameter.
This prospective study started on January 2015 and was meant to include 10 consecutive patients with PES refractory to endoscopic dilation. The protocol was approved by the research ethics committee of the Cancer Institute of the University of Sao Paulo (ICESP).
In the residual stress stage, shear stress tends to be gentle, indicating that shear dilation is caused by the broken pieces and resulting friction among them.
The tricuspid valve was normal without significant annular dilation. No stenosis or abnormal displacement of the tricuspid valve leaflets was detected.
In the PVS group and the PAS group, there was no statistical difference among age at dilation, postoperative interval, balloon/stenosis ratio, or pressure gradient predilation between the successful and the unsuccessful subgroups.