In general, parabolic resistors may be thought to represent pressure losses that arise from obstructions occurring in upper airways and the larger airways of the lung, where pressure losses are also inertial in nature, whereas linear resistors are representative of the smaller, peripheral airways, in which flow is sufficiently slow that viscous pressure losses dominate.
There are several hypotheses for the origination of these tumors, such as abnormal congenital development of the lymphatic system, arising from lymphatic obstructions (such as from infection or surgery), or as a result of local degeneration of lymphatic tissue [11].
Obstruction may arise from blockage by a hard mass of fecal matter (a fecal stone), by infection with parasites, or by the presence of a foreign object.
With informed consent prostatic tissue was obtained from male subjects undergoing trans-urethral resection for bladder outflow obstruction arising from castrate-resistant CaP or BPH.
With informed consent prostatic tissue was obtained from male subjects undergoing trans-urethral resection for bladder outflow obstruction arising from CaP or benign prostatic hyperplasia (BPH).
Secondly, RFs have to negotiate obstructions arising from proteins tightly bound to the DNA template, DNA secondary structures, ongoing transcription in their path, and buildup of torsional stress in the DNA (Aguilera and Gómez-González 2008).
Complications arising from Meckel's diverticulum include gastrointestinal bleeding, intussusception, intestinal obstruction, abdominal pain, and incarcerated hernia [3].
Clinically mucosal melanomas arising from the nasal cavity and paranasal sinuses present with nasal obstruction, epistaxis and anosmia [19].
Ultrasound imaging revealed bilateral hydronephrosis possibly as a result of bladder outlet obstruction from a large heterogeneously hyperechoic mass arising from the uterus; color Doppler imaging showed tumor vascularity (Fig. 1).
Traditionally considered as a post-inflammatory or post-traumatic sequela of glandular obstruction, a ranula is a mucous retention cyst arising from the sublingual or minor salivary glands [12].
