The assessment of the intracranial part of the internal carotid artery

Chrzanowski, R

doi:10.1007/bf00337571

Cited by 7 publications

(6 citation statements)

References 2 publications

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“…The differences between the results obtained from the cadaveric data and our intraoperative and radiological observations may be caused by the shrunken state of the major artery at autopsy. Chrzanowski14 reported ICA angles ranging from 20-43 degrees (average 31.5 degrees), which was also smaller than the ones measured in our study (44.7± 0.3 degree).…”

Section: Discussioncontrasting

confidence: 86%

Association between Internal Carotid Artery Morphometry and Posterior Communicating Artery Aneurysm

Kim

Kang

2007

Yonsei Med J

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PurposeThe goal of this study was to directly measure the association between the internal carotid artery (ICA) morphometry and the presence of ICA-posterior communicating artery (PCOM) aneurysm.Materials and MethodsThe authors intraoperatively measured the length of the supraclinoid ICA because it is impossible to radiologically determine the exact location of the anterior clinoid process. We used an image analyzer with a CT angiogram to measure the angle between the skull midline and the terminal segment of the ICA (ICA angle), as well as the diameter of the ICA. The lengths and diameters of the supraclinoid ICA and the ICA angle were compared among PCOM aneurysms, anterior communicating artery (ACOM) aneurysms, and middle cerebral artery (MCA) bifurcation aneurysms (n = 27 each). Additionally, the lengths and the diameters of M1 and A1 were compared for each aneurysm.ResultsThe lengths of the supraclinoid ICA were 11.9 ± 2.3mm. The lengths of the supraclinoid ICA in patients with ICA-PCOM aneurysms (9.7 ± 2.8mm) were shorter than those of patients with ACOM aneurysms (13.8 ± 2.2mm, Student's t-test, p < 0.001) and with MCA bifurcation aneurysms (12.2 ± 1.9 mm, Student's t-test, p < 0.001). The diameters of the supraclinoid ICA and A1 in patients with ACOM aneurysms were larger than those in patients with MCA bifurcation aneurysms (Student's t-test, p < 0.05). There were no significant differences in the lengths of M1 and A1, ICA angle, or diameter of M1 for each aneurysm.ConclusionThese results suggest that the relatively shorter length of the supraclinoid ICA may be a novel risk factor for the development of ICA-PCOM aneurysm with higher hemodynamic stress.

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Section: Discussioncontrasting

confidence: 86%

Association between Internal Carotid Artery Morphometry and Posterior Communicating Artery Aneurysm

Kim

Kang

2007

Yonsei Med J

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“…Chrzanowski (4) reported that the ICA angle (angle B in our study) ranges from 20 to 43 degrees (average, 31.5 degrees) in 100 normal subjects, which is smaller than those measured in the control group of our study (51.6 Ϯ 10.8 degrees). This might reflect the differences in population used in the 2 studies.…”

Section: Discussioncontrasting

confidence: 74%

Preoperative Predictive Value of the Necessity for Anterior Clinoidectomy in Posterior Communicating Artery Aneurysm Clipping

et al. 2009

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OBJECTIVE Resection of the anterior clinoid process (ACP) for the clipping of an internal carotid–posterior communicating artery aneurysm is rarely needed. However, preoperative awareness of the necessity of anterior clinoidectomy is essential for safe clipping of the lesions. We investigated the preoperative predictive value for anterior clinoidectomy in treating internal carotid–posterior communicating artery aneurysms. METHODS We retrospectively reviewed all patients with a posterior communicating artery aneurysm treated with clipping in the past 5 years. Only the patients who underwent both computed tomographic angiography and 4-vessel digital subtraction angiography were included in this study. We measured several angles and distances on these images, and compared the parameters measured between an anterior clinoidectomy group and a non–anterior clinoidectomy group. A P value of less than 0.05 was considered significant. RESULTS We examined 94 cases of posterior communicating artery aneurysms treated with clipping. The ACP was resected in 6 of the 94 cases. In the anterior clinoidectomy group, there were 3 factors that were statistically significant. First, the calculated real distance between the ACP and the aneurysmal neck was shorter (mean, 4.4 ± 0.7 versus 7.2 ± 1.4 mm). Second, the angle between vertical line to cranial base and communicating segment of the internal carotid artery (ICA) was larger (mean, 62.5 ± 4.6 versus 50.9 ± 10.7 degrees). Third, the angle between the communicating segment and the ophthalmic segment of the ICA was smaller (mean, 66.5 ± 15.1 versus 84.6 ± 20.4 degrees). CONCLUSION The anterior clinoidectomy group showed a more tortuous course of intracranial ICA around the ACP than the nonclinoidectomy group. Therefore, measurement of the distal ICA angle is helpful in predicting the necessity of anterior clinoidectomy.

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“…1963; Michailow, 1964; Bergland et al. 1968; Chrzanowski, 1971; Jovanovic, 1971; Hasso et al. 1975; Knosp et al.…”

Section: Discussionmentioning

confidence: 99%

“…In adults, several attempts were made to provide objective shape definitions by measuring the angles of the knees of the carotid siphon (Michailow, 1964; Chrzanowski, 1971). These measurements are usually based on lateral (two‐dimensional, 2D) projections.…”

Section: Introductionmentioning

confidence: 99%

“…However, knowledge of the shape of the infant pICA is the key to understanding the complex shape of the adult pICA as well as its remodelling, functionality and pathologies. In adults, several attempts were made to provide objective shape definitions by measuring the angles of the knees of the carotid siphon (Michailow, 1964;Chrzanowski, 1971). These measurements are usually based on lateral (two-dimensional, 2D) projections.…”

Section: Introductionmentioning

confidence: 99%

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Three‐dimensional description and mathematical characterization of the parasellar internal carotid artery in human infants

et al. 2008

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Inside the 'cavernous sinus' or 'parasellar region' the human internal carotid artery takes the shape of a siphon that is twisted and torqued in three dimensions and surrounded by a network of veins. The parasellar section of the internal carotid artery is of broad biological and medical interest, as its peculiar shape is associated with temperature regulation in the brain and correlated with the occurrence of vascular pathologies. The present study aims to provide anatomical descriptions and objective mathematical characterizations of the shape of the parasellar section of the internal carotid artery in human infants and its modifications during ontogeny. Three-dimensional (3D) computer models of the parasellar section of the internal carotid artery of infants were generated with a state-of-the-art 3D reconstruction method and analysed using both traditional morphometric methods and novel mathematical algorithms. We show that four constant, demarcated bends can be described along the infant parasellar section of the internal carotid artery, and we provide measurements of their angles. We further provide calculations of the curvature and torsion energy, and the total complexity of the 3D skeleton of the parasellar section of the internal carotid artery, and compare the complexity of this in infants and adults. Finally, we examine the relationship between shape parameters of the parasellar section of the internal carotid artery in infants, and the occurrence of intima cushions, and evaluate the reliability of subjective angle measurements for characterizing the complexity of the parasellar section of the internal carotid artery in infants. The results can serve as objective reference data for comparative studies and for medical imaging diagnostics. They also form the basis for a new hypothesis that explains the mechanisms responsible for the ontogenetic transformation in the shape of the parasellar section of the internal carotid artery.

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The assessment of the intracranial part of the internal carotid artery

Cited by 7 publications

References 2 publications

Association between Internal Carotid Artery Morphometry and Posterior Communicating Artery Aneurysm

Association between Internal Carotid Artery Morphometry and Posterior Communicating Artery Aneurysm

Preoperative Predictive Value of the Necessity for Anterior Clinoidectomy in Posterior Communicating Artery Aneurysm Clipping

Three‐dimensional description and mathematical characterization of the parasellar internal carotid artery in human infants

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