Thoracoscopic Segmentectomy for Right Upper Lobe with Unique Anatomic Variation

2021 ◽  
Author(s):  
Jianbin Zhang ◽  
Hongwei Li ◽  
Caihua Yu ◽  
Yilv Zhu
Keyword(s):  
Anatomic Variation

Assessment of the Radial Artery and Hand Circulation by Computed Tomography Angiography: A Pilot Study

2005 ◽  
Vol 8 (1) ◽  
pp. 28 ◽  
Author(s):  
Omer Faruk Dogan ◽  
Musturay Karcaaltincaba ◽  
Umit Duman ◽  
Deniz Akata ◽  
Aytekin Besim ◽  
...  
Keyword(s):  
Diabetes Mellitus ◽  
Coronary Artery ◽  
Coronary Artery Bypass ◽  
Radial Artery ◽  
Anatomic Variation ◽  
Artery Bypass ◽  
Bypass Graft ◽  
Preoperative Imaging ◽  
Median Artery ◽  
Test Result

Objectives: The radial artery (RA) is increasingly being used as a coronary bypass graft. Results of a previous study using Doppler ultrasound and histopathologic examinations indicated that the RA has a higher incidence of preexisting intimal hyperplasia, medial calcification, and atherosclerosis than the internal thoracic artery. The aims of this study were to evaluate the use of computed tomographic angiography (CTA) to display hand collateral circulation, to define the criteria for an abnormal CTA test result, and to demonstrate usefulness of CTA as an alternative to conventional angiography for evaluation of the radial artery. Materials and Methods: Sixteen patients scheduled for coronary artery bypass grafting entered this study. We performed 32 examinations of forearm and hand arterial anatomy in these patients. CTA was performed in patients with a normal Allen test result, except 1 patient who had a persistent median artery. Soft tissue density forehand roentgenography was performed in all patients before the CTA evaluation. There was no selection of patients in relation to patient characteristics. As a risk factor for radial artery calcification, 6 of the patients had diabetes mellitus, 6 had aortofemoral occlusive disease, and 4 had a history of smoking. Results: Bilateral forearm arteries were visualized in all patients. Severe RA calcification was found in 1 patient, and distal occlusion was found in another patient. Focal RA calcification was noted in 2 patients. In the remaining patients no radial artery calcification or occlusion was noted. Anatomic variation of the upper limb arteries was shown in 2 patients; these variations were persistent median artery with absence of the radial and ulnar arteries and high bifurcation of the radial artery from the brachial artery. Conclusion: CTA is useful and safe for detection of radial artery calcific disease and assessment of the forehand circulation and its anatomic variations. Preoperative imaging of the RA is a means to avoid unnecessary forearm exploration or inadvertent use of a diseased conduit in coronary artery bypass candidates with multiple risk factors such as diabetes mellitus.

scholarly journals Normative distribution of posterior circulation tissue time-to-maximum: Effects of anatomic variation, tracer kinetics, and implications for patient selection in posterior circulation ischemic stroke

2021 ◽  
pp. 0271678X2098239
Author(s):  
Adam E Goldman-Yassen ◽  
Matus Straka ◽  
Michael Uhouse ◽  
Seena Dehkharghani
Keyword(s):  
Ischemic Stroke ◽  
Selection Criteria ◽  
Arterial Input Function ◽  
Anatomic Variation ◽  
Input Function ◽  
Posterior Circulation ◽  
Anterior Circulation ◽  
Vessel Occlusion ◽  
Perfusion Time

The generalization of perfusion-based, anterior circulation large vessel occlusion selection criteria to posterior circulation stroke is not straightforward due to physiologic delay, which we posit produces physiologic prolongation of the posterior circulation perfusion time-to-maximum (Tmax). To assess normative Tmax distributions, patients undergoing CTA/CTP for suspected ischemic stroke between 1/2018-3/2019 were retrospectively identified. Subjects with any cerebrovascular stenoses, or with follow-up MRI or final clinical diagnosis of stroke were excluded. Posterior circulation anatomic variations were identified. CTP were processed in RAPID and segmented in a custom pipeline permitting manually-enforced arterial input function (AIF) and perfusion estimations constrained to pre-specified vascular territories. Seventy-one subjects (mean 64 ± 19 years) met inclusion. Median Tmax was significantly greater in the cerebellar hemispheres (right: 3.0 s, left: 2.9 s) and PCA territories (right: 2.9 s; left: 3.3 s) than in the anterior circulation (right: 2.4 s; left: 2.3 s, p < 0.001). Fetal PCA disposition eliminated ipsilateral PCA Tmax delays (p = 0.012). Median territorial Tmax was significantly lower with basilar versus any anterior circulation AIF for all vascular territories (p < 0.001). Significant baseline delays in posterior circulation Tmax are observed even without steno-occlusive disease and vary with anatomic variation and AIF selection. The potential for overestimation of at-risk volumes in the posterior circulation merits caution in future trials.

scholarly journals A novel anatomic variation of the intrahepatic biliary tree in live liver donor surgery: A case report

2021 ◽  
Vol 79 ◽  
pp. 231-233
Author(s):  
Masato Shizuku ◽  
Nobuhiko Kurata ◽  
Kanta Jobara ◽  
Atsushi Yoshizawa ◽  
Yasuhiro Ogura
Keyword(s):  
Case Report ◽  
Anatomic Variation ◽  
Biliary Tree ◽  
Liver Donor ◽  
Live Liver Donor

Levator claviculae muscle: Anatomic variation found during neck dissection

2018 ◽  
Vol 129 (3) ◽  
pp. 634-636 ◽  
Author(s):  
Fabio Ferreli ◽  
Giuseppe Mercante ◽  
Giuseppe Spriano
Keyword(s):  
Neck Dissection ◽  
Anatomic Variation

scholarly journals A Morphometric Analysis of Intra-articular Disc of Temporomandibular Joints in Cadavers

2021 ◽  
Author(s):  
Pratik Ashokkumar Agrawal ◽  
Navin S Shah ◽  
Ramnarayan A Gandotra ◽  
Karan Vasantray Panchal ◽  
Rishabh Navin Shah
Keyword(s):  
Temporomandibular Joint ◽  
Anatomic Variation ◽  
Maxillofacial Surgery ◽  
Temporomandibular Joint Disorders ◽  
Research Centre ◽  
Oral And Maxillofacial Surgery ◽  
Articular Disc ◽  
Chi Square ◽  
Temporomandibular Joints ◽  
Human Cadavers

Introduction: Temporomandibular Joint (TMJ) has been a controversial topic in Oral and Maxillofacial Surgery speciality especially regarding temporomandibular joint disorders and internal derangement of articular disc. The aetiology behind it has been related to the anatomic variations of the disc and its impact on the functioning of the articular disc. To understand such anatomic variation, the study has been conducted that will help future maxillofacial surgeon’s in designing accurate prosthetic articular disc that will improve the overall mechanics of the functioning of the prosthetic disc. Aim: To analyse the morphometric variations of the intra-articular disc in terms of circumference of the disc, perforations and their thickness within the disc in cadavers. Materials and Methods: The present observational study was carried out on cadavers in the Department of Anatomy. SBKS Medical College and Research Centre, Sumandeep Vidyapeeth University, Gujarat, India. The study was done from January 2017 to October 2018. Temporomandibular joints were dissected bilaterally from 10 human cadavers, i.e., 20 articular discs. The disc was removed and was measured with the help of thread, vernier callipers and standardised metallic scale and the circumference and thickness in the disc were evaluated. Descriptive statistical test was used and Chi-square test was applied. Results: Mean thickness of disc, both in males as well as females ranged from 1.4-2.0 mm in the Posterio-Medial (PM) and Posterio- Lateral (PL) region, while in Anterio-Medial (AM) and Anterio- Lateral (AL) region it ranged from 1.6-1.8 mm. Maximum length of disc ranged from 12-13 mm in anterio-posterio dimension while in Medio-Lateral (ML) it was 22-23 mm. Conclusion: The study gives an indepth knowledge about the various morphometric variations of articular disc and also shows its impact on the functioning of the disc. The study also directs maxillofacial surgeons to design prosthetic articular disc with greater accuracy and anatomical knowledge so that the procedures like surgical replacement of the disc can be carried out with greater potency and efficacy for the betterment of the patient.

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