scholarly journals Ophthalmic Artery Flow Pattern-related Stump Pressure and Ischemic Tolerance during Balloon Test Occlusion of the Internal Carotid Artery

2021 ◽  
Author(s):  
Nobuyuki IZUTSU ◽  
Takeo NISHIDA ◽  
Masatoshi TAKAGAKI ◽  
Tomohiko OZAKI ◽  
Tomofumi TAKENAKA ◽  
...  
Keyword(s):  
Carotid Artery ◽  
Internal Carotid Artery ◽  
Flow Pattern ◽  
Ophthalmic Artery ◽  
Internal Carotid ◽  
Ischemic Tolerance ◽  
Balloon Test Occlusion ◽  
Stump Pressure ◽  
Artery Flow

Effect of Carotid Endarterectomy on Chronic Ocular Ischemic Syndrome Due to Internal Carotid Artery Stenosis

Neurosurgery ◽  
2001 ◽  
Vol 48 (2) ◽  
pp. 328-333 ◽  
Author(s):  
Shoichiro Kawaguchi ◽  
Shuzo Okuno ◽  
Toshisuke Sakaki ◽  
Norikiyo Nishikawa
Keyword(s):  
Carotid Artery ◽  
Internal Carotid Artery ◽  
Carotid Endarterectomy ◽  
Carotid Artery Stenosis ◽  
Ophthalmic Artery ◽  
Internal Carotid ◽  
Color Doppler ◽  
Internal Carotid Artery Stenosis ◽  
Artery Stenosis ◽  
Artery Flow

Abstract OBJECTIVE We evaluated the effect of carotid endarterectomy on chronic ocular ischemic syndrome due to internal carotid artery stenosis by use of data obtained from ophthalmic artery color Doppler flow imaging. METHODS We examined 11 patients with ocular ischemic syndrome due to internal carotid artery stenosis (>70% stenosis) who were being treated by carotid endarterectomy. Ophthalmic artery color Doppler flow imaging indicated ophthalmic artery flow direction and peak systolic flow velocity and was performed before and at 1 week, 1 month, and 3 months after surgery. RESULTS We assessed the ophthalmic arteries of 11 patients via color Doppler flow imaging. Before undergoing carotid endarterectomy, five patients showed reversed ophthalmic artery flow. In the other six patients who experienced antegrade ophthalmic artery flow, the average peak systolic flow velocity was 0.09 ± 0.05 m/s (mean ± standard deviation). Preoperative reversed flow resolved in each patient 1 week after undergoing surgery. All patients showed antegrade ophthalmic artery flow. The average peak systolic flow velocity in the patients who had preoperative antegrade flow rose significantly, to 0.21 ± 0.14 m/s (P < 0.05). There was no significant change as compared with findings at 1 week after surgery. During the follow-up period (mean, 32.4 mo), no patients complained of recurrent visual symptoms. At the end of the study period, visual acuity had improved in five patients and had not worsened in the other six patients. CONCLUSION Carotid endarterectomy was effective for improving or preventing the progress of chronic ocular ischemia caused by internal carotid artery stenosis.

scholarly journals Fetal internal carotid artery flow velocity time waveforms in twin pregnancies

1988 ◽  
Vol 16 (5-6) ◽  
pp. 405-409 ◽  
Author(s):  
Shimon Degani ◽  
Joav Paltiely ◽  
Reuven Lewinsky ◽  
Israel Shapiro ◽  
Mordechai Sharf
Keyword(s):  
Carotid Artery ◽  
Internal Carotid Artery ◽  
Flow Velocity ◽  
Internal Carotid ◽  
Artery Flow ◽  
Twin Pregnancies

scholarly journals Carotid angioplasty with internal carotid artery flow reversal is well tolerated in the awake patient

2004 ◽  
Vol 40 (1) ◽  
pp. 92-97 ◽  
Author(s):  
Enrique Criado ◽  
Manuel Doblas ◽  
Juan Fontcuberta ◽  
Antonio Orgaz ◽  
Angel Flores ◽  
...  
Keyword(s):  
Carotid Artery ◽  
Internal Carotid Artery ◽  
Internal Carotid ◽  
Flow Reversal ◽  
Carotid Angioplasty ◽  
Awake Patient ◽  
Artery Flow

Orbital Vascular And Lymphatic Systems

2012 ◽  
Author(s):  
David Jordan ◽  
Louise Mawn ◽  
Richard L. Anderson
Keyword(s):  
Carotid Artery ◽  
Internal Carotid Artery ◽  
Cavernous Sinus ◽  
Ophthalmic Artery ◽  
Internal Carotid ◽  
External Carotid Artery ◽  
External Carotid ◽  
Sympathetic Nerve Fibers ◽  
Carotid Canal ◽  
Cervical Ganglion

The anatomy of the orbital vascular bed is complex, with tremendous individual variation. The main arterial supply to the orbit is from the ophthalmic artery, a branch of the internal carotid artery. The external carotid artery normally contributes only to a small extent. However, there are a number of orbital branches of the ophthalmic artery that anastomose with adjacent branches from the external carotid artery, creating important anastomotic communications between the internal and external carotid arterial systems. The venous drainage of the orbit occurs mainly via two ophthalmic veins (superior and inferior) that extend to the cavernous sinus, but there are also connections with the pterygoid plexus of veins, as well as some more anteriorly through the angular vein and the infraorbital vein to the facial vein. A working knowledge of the orbital vasculature and lymphatic systems is important during orbital, extraocular, or ocular surgery. Knowing the anatomy of the blood supply helps one avoid injury to the arteries and veins during operative procedures within the orbit or the eyelid. Inadvertent injury to the vasculature not only distorts the anatomy and disrupts a landmark but also prolongs the surgery and might compromise blood flow to an important orbital or ocular structure. Upon entering the cranium, the internal carotid artery passes through the petrous portion of the temporal bone in the carotid canal and enters the cavernous sinus and middle cranial fossa through the superior part of the forame lacerum . It proceeds forward in the cavernous sinus with the abducens nerve along its side. There it is surrounded by sympathetic nerve fibers (the carotid plexus ) derived from the superior cervical ganglion. It then makes an upward S-shaped turn to form the carotid siphon , passing just medial to the oculomotor, trochlear, and ophthalmic nerves (V1). After turning superiorly in the anterior cavernous sinus, the carotid artery perforates the dura at the medial aspect of the anterior clinoid process and turns posteriorly, inferior to the optic nerve.

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