The interventional radiologist must have thorough anatomical knowledge of the inferior petrosal venous drainage and its anatomical variations and should be able to identify hypoplastic sinus or multiple small channels instead of a single inferior petrosal vein. (medscape.com)
Below is roadmap image of sigmoid sinus injection (left images), followed by venous phase of ICA injection (right images). (neuroangio.org)
Notice contrast in the venous pouch / channel below the coil mass - had the left jugular outflow been preserved we would have tried to save the sinus by superselective transvenous embo. (neuroangio.org)
Digital2
PHA was demonstrated and basilar artery occlusion was confirmed using digital subtraction angiography. (bvsalud.org)
Digital subtraction angiography revealed four aneurysms and anastomoses between the left AMA and inferolateral trunk (ILT). (nagoya-u.ac.jp)
Method1
Bilateral and simultaneous petrosal sinus sampling is the gold standard method and is performed when the triad of initial tests is inconclusive, doubtful or conflicting. (scielo.br)
Blood3
Before each sample is drawn, the catheters are aspirated, saline-diluted blood discarded, and the position of the catheters confirmed. (medscape.com)
Blood samples are immediately placed in specially labeled EDTA-containing tubes and placed on ice. (medscape.com)
A 52-year-old woman with nonspecific symptoms was diagnosed with multiple cerebral aneurysms and abnormal blood vessels observed on magnetic resonance angiography. (nagoya-u.ac.jp)
Inferior petro2
Individual centers have their own protocols and preferences for catheters and guidewires for performing inferior petrosal sinus sampling (IPSS). (medscape.com)
IPSS was introduced in 1977 by Corrigan et al, who reported the use of unilateral selective catheterization and venous sampling to localize ACTH secretion in a patient with a perplexing clinical and laboratory picture compatible with either ectopic ACTH secretion or pituitary-dependent Cushing syndrome. (medscape.com)
Doppman et al (1984) suggested simultaneous sampling from both inferior petrosal sinuses (IPSs) to avoid false-negative results in the presence of a pituitary corticotroph adenoma. (medscape.com)
Procedure1
The procedure may have to be abandoned in rare cases if the inferior petrosal vein drains into the condylar vein and has no communication with the internal jugular. (medscape.com)
Carotid2
Our team treats conditions such as cerebral aneurysm, arteriovenous malformations (AVMs), carotid stenosis, intracranial stenosis, acute ischemic stroke, spinal arteriovenous malformations, arteriovenous fistulae, moyamoya disease and cavernous malformation among other neurovascular diseases. (cooperhealth.org)
Although vision loss may be rare since the orbital nerve is located externally to cavernous sinus , it can develop through other pathophysiological mechanisms such as internal carotid artery occlusion (ICA), ophthalmic (central) retinal arteries obstructions, orbital congestion and arteritis [7]. (symptoma.com)
ACTH4
Samples are drawn simultaneously from the IPS and the peripheral veins for plasma ACTH 5 minutes and 1 minute before administration of oCRH. (medscape.com)
One µg/kg to a maximum of 100 µg of oCRH is given intravenously in a peripheral vein, and samples for plasma ACTH are collected at 2, 5, and 10 minutes after administration. (medscape.com)
A peripheral sample for plasma cortisol is also taken along with each sample of ACTH. (medscape.com)
Centrifugation and plasma decantation of the sample should be performed within one hour and samples analyzed immediately or frozen until ACTH assay. (medscape.com)
Clinical1
Cavernous sinus thrombosis (CST) is an uncommon clinical condition caused by blood clot formation that obstructs the cavernous cavity . (symptoma.com)