Search PubMed⌕ Search

Biomedical subjects

S Kan

Publications and source records attributed to S Kan.

130 records · Page 8Linked to original sources
PubMedDate not supplied

Two different calibrated-leak balloons: experimental work and application in humans.

Two different types of latex calibrated-leak balloon catheters have been developed. One consists of a Teflon catheter with a detachable latex balloon and is used to embolize branches of the external carotid artery. The other consists of a Silastic catheter with a nondetachable latex balloon and is used to embolize brain arteriovenous malformations. An experimental model and animal experiments have determined the best conditions for safe and reproducible embolization with isobutyl-2 cyanoacrylate (IBC-2). Selective catheterization of branches of external carotid, middle cerebral, anterior cerebral, and posterior cerebral arteries in humans is facilitated, and embolization with IBC-2 has been achieved with these balloon catheters.

Adolescent↗
PubMedDate not supplied

Delayed CT metrizamide enhancement of syringomyelia secondary to tumor.

Six cases of syringomyelia associated with intramedullary tumor were examined by metrizamide myelography and delayed computed tomography. All cases showed opacification of syringomyelic cavities 7-24 hr after myelography. This finding suggests that metrizamide can pass through the cord substance from the subarachnoid space into a syrinx cavity in noncommunicating types of syringomyelia. It supports the theory of transneural passage of fluid as part of the origin of such cavities. These cases also support the thesis that, in patients with cord cavities, tumor can be excluded only if the cavity is demonstrated within all areas of cord enlargement.

Adult↗
PubMedDate not supplied

Spontaneous carotid cavernous fistula presenting only with cranial nerve palsies.

PURPOSE: To discuss the differences in angiographic findings between cases of spontaneous carotid cavernous fistula with and without the classical triad of symptoms (pulsating exophthalmos, bruit, and conjunctival chemosis). METHODS: With CT, MR, and angiography, we examined 12 cases of spontaneous carotid cavernous fistula, five of whom presented only with cranial nerve palsies. RESULTS: In the seven cases with the triad, the main venous drainage from the cavernous sinus was the superior ophthalmic vein. Only one or two veins drained the cavernous sinus, and cortical venous drainage was not present in any case. In contrast, all but one case with only cranial nerve palsies had at least three venous drainage routes from the cavernous sinus, including cortical venous drainage. CONCLUSION: For the diagnoses of spontaneous carotid cavernous fistula, it is important to know that some patients do not show the classical triad of symptoms. In such patients, early diagnosis and treatment are particularly important because cortical venous drainage and a consequent risk of hemorrhage are frequently present.

Adult↗