scholarly journals Cranial arterial patterns of the alpaca (Camelidae: Vicugna pacos )

2017 ◽  
Vol 4 (3) ◽  
pp. 160967 ◽  
Author(s):  
Haley D. O'Brien
Keyword(s):  
Carotid Artery ◽  
New World ◽  
Internal Carotid ◽  
Developmental Stages ◽  
Arterial System ◽  
Brain Cooling ◽  
Selective Brain Cooling ◽  
Vicugna Pacos ◽  
Cranial Arteries ◽  
Carotid Arterial

Artiodactyl cranial arterial patterns deviate significantly from the standard mammalian pattern, most notably in the possession of a structure called the carotid rete (CR)—a subdural arterial meshwork that is housed within the cavernous venous sinus, replacing the internal carotid artery (ICA). This relationship between the CR and the cavernous sinus facilitates a suite of unique physiologies, including selective brain cooling. The CR has been studied in a number of artiodactyls; however, to my knowledge, only a single study to date documents a subset of the cranial arteries of New World camelids (llamas, alpacas, vicugñas and guanacoes). This study is the first complete description of the cranial arteries of a New World camelid species, the alpaca ( Vicugna pacos ), and the first description of near-parturition cranial arterial morphology within New World camelids. This study finds that the carotid arterial system is conserved between developmental stages in the alpaca, and differs significantly from the pattern emphasized in other long-necked ruminant artiodactyls in that a patent, homologous ICA persists through the animal's life.

Surgical Palatomaxilloschisis: An Avenue to the Pterygomaxillary Space

1981 ◽  
Vol 89 (1) ◽  
pp. 59-61
Author(s):  
Louis T. Tenta ◽  
David D. Caldarelli ◽  
Geoffrey R. Keyes
Keyword(s):  
Carotid Artery ◽  
Internal Carotid ◽  
Surgical Intervention ◽  
Posterior Wall ◽  
Arterial System ◽  
Operative Field ◽  
Pterygoid Process ◽  
Potential Reservoir ◽  
Carotid Arterial ◽  
Greater Wing

The pterygomaxillary space (PMS) is a potential reservoir for expansion of the neoplasms originating in the epipharynx. Palatotomic and mandibulotomic approaches to this secluded site have been reported. The advantages of surgical palatomaxilloschisis are twofold. First, the exposure of the operative field is panoramic. Second, the carotid arterial system is identifiable prior to surgical intervention. The triangular pterygomaxillary recess is bounded superiorly by the greater wing of the sphenoid, posteriorly by the pterygoid process and anteriorly by the dorsal convexity of the posterior wall of the maxilla. Ascending laterally to the PMS in its route to penetrate the temporal bone is the internal carotid artery. In Particular, juvenile angiofibromas which originate in the epipharynx may in their growth encroach upon the bounds of the PMS. The surgical objective is not only to extirpate the neoplasm but also to safeguard the carotid arterial system which may be displaced by the new growth and thereby become a surgical hazard. A clinical experience illustrates the applicability of this approach.

scholarly journals Variations, relations and clinical significance of carotid arterial system in anterior neck: a cadaveric study

2019 ◽  
Vol 7 (4) ◽  
pp. 1127
Author(s):  
Anasuya Ghosh ◽  
Subhramoy Chaudhury ◽  
Atin Datta
Keyword(s):  
Carotid Artery ◽  
Carotid Arteries ◽  
Internal Carotid ◽  
Hypoglossal Nerve ◽  
Carotid Bifurcation ◽  
External Carotid Artery ◽  
Arterial System ◽  
External Carotid ◽  
The Common ◽  
Carotid Arterial

Background: The common carotid, internal and external carotid arteries and their branches serve as major source of blood supply in head-neck region of human and are often encountered during numerous surgical and clinical interventions of neck.Methods: We dissected and examined both sides of neck in 49 well embalmed cadavers (98 sides). We recorded the following anatomical parameters of carotid arterial system-level of bifurcation, the relation between internal and external carotid arteries, branching pattern of anterior branches of external carotid artery, tortuosity in carotid arterial system, and relation of hypoglossal nerve with the carotid arteries.Results: In 56.16 % cases, the common carotid arterial bifurcation took place at the upper border of thyroid cartilage though high bifurcation was quite common (43.88%). The external carotid artery was located antero-medial to internal carotid artery in most cases (93.87%). Abnormal tortuosity of carotid arterial system was detected in 2.04% cases only. In 86.73% cases, the hypoglossal nerve crossed the internal and external carotid artery superior to carotid bifurcation above the level of hyoid bone while in 1 case it crossed immediately inferior to carotid bifurcation. In branching pattern, following variations were observed- linguo-facial trunk in 15.3% cases, thyro-lingual trunk in 5.1% cases, origin of superior thyroid artery from common carotid in 10.02% cases and origin of superior thyroid from internal carotid in one case (1.02%).Conclusions: The carotid arterial system has complex and variable anatomy in neck and this information should be kept in mind to avoid unwanted damage during surgical procedures of neck.

scholarly journals A comparison of postnatal arterial patterns in a growth series of giraffe (Artiodactyla:Giraffa camelopardalis)

PeerJ ◽  
2016 ◽  
Vol 4 ◽  
pp. e1696 ◽  
Author(s):  
Haley D. O’Brien ◽  
Paul M. Gignac ◽  
Tobin L. Hieronymus ◽  
Lawrence M. Witmer
Keyword(s):  
Carotid Artery ◽  
Internal Carotid Artery ◽  
Internal Carotid ◽  
Developmental Stages ◽  
High Surface ◽  
High Surface Area ◽  
Arterial System ◽  
Maxillary Artery ◽  
Growth Series ◽  
Arterial Development

Nearly all living artiodactyls (even-toed ungulates) possess a derived cranial arterial pattern that is highly distinctive from most other mammals. Foremost among a suite of atypical arterial configurations is the functional and anatomical replacement of the internal carotid artery with an extensive, subdural arterial meshwork called the carotid rete. This interdigitating network branches from the maxillary artery and is housed within the cavernous venous sinus. As the cavernous sinus receives cooled blood draining from the nasal mucosa, heat rapidly dissipates across the high surface area of the rete to be carried away from the brain by the venous system. This combination yields one of the most effective mechanisms of selective brain cooling. Although arterial development begins from the same embryonic scaffolding typical of mammals, possession of a rete is typically accompanied by obliteration of the internal carotid artery. Among taxa with available ontogenetic data, the point at which the internal carotid obliterates is variable throughout development. In small-bodied artiodactyls, the internal carotid typically obliterates prior to parturition, but in larger species, the vessel may remain patent for several years. In this study, we use digital anatomical data collection methods to describe the cranial arterial patterns for a growth series of giraffe (Giraffa camelopardalis), from parturition to senescence. Giraffes, in particular, have unique cardiovascular demands and adaptations owing to their exceptional body form and may not adhere to previously documented stages of cranial arterial development. We find the carotid arterial system to be conserved between developmental stages and that obliteration of the giraffe internal carotid artery occurs prior to parturition.

scholarly journals Supraclinoid Internal Carotid Arterial Aneurysm Presenting as a Suprasellar Mass-Like Lesion in a Child

2001 ◽  
Vol 7 (4) ◽  
pp. 357-361 ◽  
Author(s):  
D. Chul Suh ◽  
H. Alvarez ◽  
C. Sainte Rose ◽  
P. Lasjaunias
Keyword(s):  
Differential Diagnosis ◽  
Carotid Artery ◽  
Internal Carotid Artery ◽  
Visual Loss ◽  
Internal Carotid ◽  
Giant Aneurysm ◽  
Arterial Aneurysm ◽  
Endovascular Technique ◽  
Patient Will ◽  
Carotid Arterial

We present the case of a two-year and seven-month-old boy with a partially-thrombosed giant lobulated aneurysm in the supraclinoid portion of the internal carotid artery. He presented with several months of symptoms of progressive frontal headache and visual loss. CT revealed a large lobulated suprasellar mass lesion mimicking a craniopharyngioma. After the aneurysm was successfully obliterated by an endovascular procedure, regression of the giant aneurysm was confirmed on followed-up MRI. The differential diagnosis, possible etiologies, and the endovascular technique for pediatric patient will be discussed.

Re-Evaluation of Arteriovenous Cooling of the Blood Supply to Human Brains

1999 ◽  
Author(s):  
Liang Zhu
Keyword(s):  
Heat Conduction ◽  
Heat Exchange ◽  
Carotid Artery ◽  
Body Core Temperature ◽  
Brain Cooling ◽  
Selective Brain Cooling ◽  
Arterial Blood ◽  
Radial Heat ◽  
Body Core ◽  
Vascular Geometry

Abstract The purpose of this work is to evaluate the capacity of the heat loss from the carotid artery in human brain and thus, to provide indirect evidence of the existence of selective brain cooling (SBC) in humans during hyperthermia. A theoretical model is developed to describe the effects of local blood perfusion and vascular geometry on the thermal equilibration in the carotid artery based on the blood flow measurements and the anatomical vascular geometry in the human neck. A theoretical approach is used to estimate the potential for cooling of blood in the carotid artery on its way to the brain by heat exchange with its countercurrent jugular vein and by the radial heat conduction loss to the cool neck surface. It is shown that the cooling of the arterial blood can be as much as 1.3 °C lower than the body core temperature, which is in agreement with previous experimental measurements of the temperature difference between the tympanic and body core temperatures. The model also evaluates the relative contributions of countercurrent heat exchange and radial heat conduction to selective brain cooling. It is found that these mechanisms are comparable with each other. Results of the present study will help provide a better understanding of the thermoregulation during hyperthermia. They can be used to guide the design of future experimental investigations of the mechanism of SBC.

Surgical Treatment of Carotid Artery Disease

2020 ◽  
Author(s):  
Wesley S. Moore
Keyword(s):  
Ischemic Stroke ◽  
Carotid Artery ◽  
Internal Carotid Artery ◽  
Carotid Endarterectomy ◽  
Internal Carotid ◽  
Carotid Artery Disease ◽  
Carotid Bifurcation ◽  
Eversion Endarterectomy ◽  
Artery Disease ◽  
Carotid Arterial

The rationale for operating on patients with carotid artery disease is to prevent stroke. It has been estimated that in 50 to 80% of patients who experience an ischemic stroke, the underlying cause is a lesion in the distribution of the carotid artery, usually in the vicinity of the carotid bifurcation. Appropriate identification and intervention could significantly reduce the incidence of ischemic stroke. Carotid endarterectomy for both symptomatic and asymptomatic carotid artery stenosis has been extensively evaluated in prospective, randomized trials. Surgical reconstruction of the carotid artery yields the greatest benefits when done by surgeons who can keep complication rates to an absolute minimum. The majority of complications associated with carotid arterial procedures are either technical or judgmental; accordingly, this review emphasizes the procedural aspects of planning and operation considered to be particularly important for deriving the best short- and long-term results from surgical intervention. Specifically, this review covers preoperative evaluation, operative planning, operative technique, postoperative care, follow-up, and alternatives to direct carotid reconstruction. Figures show carotid arterial procedures including recommended patient positioning, the commonly used vertical incision, the alternative transverse incision, mobilization of the sternocleidomastoid muscle to identify the jugular vein, palpation of the internal carotid artery, division of the structures between the internal and external carotid arteries to allow the carotid bifurcation to drop down, division of the posterior belly of the digastric muscle to yield additional exposure of the internal carotid artery, a graphic representation of the measurement of internal carotid artery back-pressure, a central infarct zone surrounded by an ischemic zone, shunt placement, open endarterectomy, eversion endarterectomy, repair of fibromuscular dysplasia, and repair of coiling or kinking of the internal carotid artery. This review contains 17 figures, and 25 references Key words: Carotid artery disease; Carotid endarterectomy; Carotid angioplasty with stenting; Eversion endarterectomy; Open endarterectomy; Carotid plaque; TCAR  

scholarly journals Anomalous External Carotid Artery-Internal Carotid Artery Anastomosis in Two Patients with Proximal Internal Carotid Arterial Remnants

2015 ◽  
Vol 16 (4) ◽  
pp. 914 ◽  
Author(s):  
Chang Hun Kim ◽  
Young Dae Cho ◽  
Hyun-Seung Kang ◽  
Jeong Eun Kim ◽  
Seung Chai Jung ◽  
...  
Keyword(s):  
Carotid Artery ◽  
Internal Carotid Artery ◽  
Internal Carotid ◽  
External Carotid Artery ◽  
External Carotid ◽  
Carotid Arterial

scholarly journals Systematization and Description of Arterial Vascularization of the Paleopallia Area on the Brain Surface of Chinchilla (Chinchilla lanigera)

2020 ◽  
Vol 48 ◽  
Author(s):  
Ana Cristina Pacheco de Araújo ◽  
Rui Campos
Keyword(s):  
Carotid Artery ◽  
Internal Carotid Artery ◽  
Basilar Artery ◽  
Internal Carotid ◽  
Cerebral Arteries ◽  
Arterial System ◽  
Caudal Portion ◽  
Spinal Cord Segment ◽  
Arterial Vascularization ◽  
The Brain

Background: Chinchilla (Chinchilla lanigera) is a small rodent that in recent years has been increasingly used as a laboratory animal by different researchers. Brain irrigation is the object of study by several authors, being chinchilla classified as a vertebrobasillary animal, that is, it does not depend on the internal carotid artery to originate its cerebral arterial vascularization. Thus, the objective of this study was to systematize and describe the branches of the rostral, middle and caudal cerebral arteries that vascularized the paleopallia area of the chinchilla. Materials, Methods & Results: Thirty Chinchilla lanigera brains were used in this study, 17 females and 13 adult males from farms in the municipalities of Viamão and Santa Maria in the state of Rio Grande do Sul, Brazil. The animals were heparinized, with 5000 IU / animal, and after 30 min were sacrificed with 8 mL / 2.5% sodium thiopental animal, both intraperitoneally. The thoracic cavity was opened, the cardiac apex sectioned and the aortic arch was cannulated through the left ventricle. The arterial system was flushed with 0.9% cooled saline, 100mL / animal and then filled with 603 latex stained red with specific dye. The skin was recessed and a bone window opened in the cranial vault. Thus the pieces were fixed in 20% formaldehyde for seven days and after this period, the brain with a cervical spinal cord segment was removed and ventral schematic drawings of all preparations were prepared. The Veterinary Anatomical Nomina (2017) was used to name the cerebral arteries and their branches and for the statistical analysis of the results, the percentage calculation was applied. Brain irrigation in the chinchilla was supplied by the basilar artery, which was formed by anastomosis of the terminal branches of the right and left vertebral arteries, in the most caudal portion of the oblong medulla. The paleopallia areas corresponded to the olfactory trine, lateral brain fossa, piriform lobe, bulb and olfactory peduncle, and the medial and lateral olfactory tracts. Irrigation of the chinchilla paleopallia area was supplied by central branches from the caudal, middle and rostral cerebral arteries, and by the central branches originating from the terminal branches of the basilar artery.Discussion: Justifying the discussion about the systematization and description of arterial vascularization of the paleopallia area of the chinchilla brain, it was compared to other species such as wild boar, nutria, rabbit and greasy of the field, because only in these animals were found references on the subject. . The central branches of the cerebral arteries were mainly responsible for the irrigation of the paleopallia areas of the chinchilla brain, as well as in the species already mentioned. Due to the variation of the types of arterial vascularization in each of these species, small differences were observed, and these central vessels may also be emitted from the rostral branch of the internal carotid artery, such as in the rabbit and fatty grapefruit, or from the brain carotid artery as in wildboar. Similarities between chinchilla and nutria were also observed, and these central branches may originate from the terminal branches of the basilar artery in both species.

Surgical Treatment of Carotid Artery Disease

2020 ◽  
Author(s):  
Wesley S. Moore
Keyword(s):  
Ischemic Stroke ◽  
Carotid Artery ◽  
Internal Carotid Artery ◽  
Carotid Endarterectomy ◽  
Internal Carotid ◽  
Carotid Artery Disease ◽  
Carotid Bifurcation ◽  
Eversion Endarterectomy ◽  
Artery Disease ◽  
Carotid Arterial

The rationale for operating on patients with carotid artery disease is to prevent stroke. It has been estimated that in 50 to 80% of patients who experience an ischemic stroke, the underlying cause is a lesion in the distribution of the carotid artery, usually in the vicinity of the carotid bifurcation. Appropriate identification and intervention could significantly reduce the incidence of ischemic stroke. Carotid endarterectomy for both symptomatic and asymptomatic carotid artery stenosis has been extensively evaluated in prospective, randomized trials. Surgical reconstruction of the carotid artery yields the greatest benefits when done by surgeons who can keep complication rates to an absolute minimum. The majority of complications associated with carotid arterial procedures are either technical or judgmental; accordingly, this review emphasizes the procedural aspects of planning and operation considered to be particularly important for deriving the best short- and long-term results from surgical intervention. Specifically, this review covers preoperative evaluation, operative planning, operative technique, postoperative care, follow-up, and alternatives to direct carotid reconstruction. Figures show carotid arterial procedures including recommended patient positioning, the commonly used vertical incision, the alternative transverse incision, mobilization of the sternocleidomastoid muscle to identify the jugular vein, palpation of the internal carotid artery, division of the structures between the internal and external carotid arteries to allow the carotid bifurcation to drop down, division of the posterior belly of the digastric muscle to yield additional exposure of the internal carotid artery, a graphic representation of the measurement of internal carotid artery back-pressure, a central infarct zone surrounded by an ischemic zone, shunt placement, open endarterectomy, eversion endarterectomy, repair of fibromuscular dysplasia, and repair of coiling or kinking of the internal carotid artery. This review contains 17 figures, and 25 references Key words: Carotid artery disease; Carotid endarterectomy; Carotid angioplasty with stenting; Eversion endarterectomy; Open endarterectomy; Carotid plaque; TCAR  

Sign in / Sign up

Export Citation Format

Share Document