-
The Laryngoscope Apr 2015Our retrospective study aims to assess the ability of computed tomography arteriography and venography (CT A/V) to detect various findings that suggest a potential cause...
OBJECTIVES/HYPOTHESIS
Our retrospective study aims to assess the ability of computed tomography arteriography and venography (CT A/V) to detect various findings that suggest a potential cause of pulsatile tinnitus and to examine the association between these findings and the side of pulsatile tinnitus.
STUDY DESIGN
A retrospective review of CT arteriography and venography of 32 patients with established pulsatile tinnitus and normal otoscopic examination was performed. The scans were performed using a 64-slice multidetector scanner and were reviewed to look for findings that are known to cause pulsatile tinnitus.
RESULTS
One or more findings that are known to cause pulsatile tinnitus were detected on the symptomatic side in 30 patients; on the asymptomatic side in 3 patients, one patient with bilateral pulsatile tinnitus showed a potential cause of symptoms only on one side, and in one patient no potential cause could be identified. There is a significant association seen between the side of pulsatile tinnitus and various potential causes of pulsatile tinnitus detected (P < 0.001), between the side of pulsatile tinnitus and various potential venous cause detected (P < 0.001), and between the side of pulsatile tinnitus and the side of dominant venous system (P = 0.02).
CONCLUSION
CT arteriography and venography is a useful tool in detecting many described potential causes of pulsatile tinnitus. Significant association is demonstrated between the side of pulsatile tinnitus and the potential causes of pulsatile tinnitus detected by CT arteriography and venography when the otoscopic examination is normal.
Topics: Adolescent; Adult; Aged; Angiography; Cohort Studies; Female; Humans; Male; Middle Aged; Multidetector Computed Tomography; Otoscopy; Phlebography; Reference Values; Retrospective Studies; Sensitivity and Specificity; Severity of Illness Index; Tinnitus; Young Adult
PubMed: 25379666
DOI: 10.1002/lary.25010 -
Anatomia, Histologia, Embryologia Nov 2020The aim of this study was to compare the arterial vascularization of the pelvic limb between southern caracara (Caracara plancus) and great egret (Ardea alba) by... (Comparative Study)
Comparative Study
The aim of this study was to compare the arterial vascularization of the pelvic limb between southern caracara (Caracara plancus) and great egret (Ardea alba) by dissection and radiographic examinations. Five specimens of caracaras (three males and two females), and seven great egrets (five males and two females) were used. Barium sulphate and latex suspension were injected into the left ventricle of the birds. The radiographs were taken with the pelvic limbs in the ventrodorsal, dorsoplantar, mediolateral and lateromedial recumbency. Thereafter, the material was fixed in a 10% solution of formaldehyde and dissected. The pelvic limb received its arterial supply from two main vessels, the ischiatic and external iliac arteries. The ischiatic artery presented to be the principal artery of pelvic limb in the caracara and great egret. Several branches arised from the ischiatic and external iliac arteries were described. No gender differences were observed in both species. The caracara and great egret showed arteries similar to those reported for the ostrich and domestic fowl. According to the results of this study, it is suggested that the caracara has a pelvic limb with more arterial branches and larger arterial diameter than the great egret, which is probably related to the specific behaviour of these birds, since the caracara is a bird that exercise more their pelvic limbs to capture its prey when compared with the great egret.
Topics: Angiography; Animals; Arteries; Birds; Brazil; Falconiformes; Feeding Behavior; Female; Hindlimb; Iliac Artery; Male; Popliteal Artery; Tibial Arteries
PubMed: 32537833
DOI: 10.1111/ahe.12585 -
The Laryngoscope Dec 2023Described herein is an innovative, minimally-invasive technique to harvest temporoparietal fascia flap used in implant-based ear reconstruction for children with...
Described herein is an innovative, minimally-invasive technique to harvest temporoparietal fascia flap used in implant-based ear reconstruction for children with microtia. This technique utilizes a never previously described application of intra-operative Indocyanine Green Angiography to optimize flap viability and minimizing the risk of facial nerve injury. Laryngoscope, 133:3615-3618, 2023.
Topics: Child; Humans; Indocyanine Green; Congenital Microtia; Plastic Surgery Procedures; Surgical Flaps; Angiography
PubMed: 37218680
DOI: 10.1002/lary.30759 -
Vascular Jun 2022Research in the field of lower extremity vascular disease has increased in popularity over the years. To adequately characterize and validate the effectiveness of...
OBJECTIVES
Research in the field of lower extremity vascular disease has increased in popularity over the years. To adequately characterize and validate the effectiveness of vascular interventions, in vivo experimentation in large animals is required. Thus, it is necessary to find a method to detect the shape and density of blood vessels in the lower extremities that can evaluate and verify the treatment measures' effectiveness and have high accuracy and repeatability. This study characterized factors that determined both the accuracy and overall value of digital subtraction angiography in lower limb arteriography using a canine animal model.
METHODS
Six beagle dogs were anesthetized and immobilized on the motorized table. The femoral artery was accessed using an indwelling needle. A bolus of contrast agent was injected into the access site, and digital subtraction angiography with bolus chase technology was used to collect contrast images for analysis. At the end of the procedure, the anesthetized dogs were euthanized using an overdose of potassium chloride. After confirming the euthanasia of the dogs, the cadavers were taken to the experimental animal center of Xinjiang Medical University and processed by qualified institutional personnel.
RESULTS
The final arteriographic images of the hind limbs from all six dogs were precise, and the branches of small vessels could be distinguished without any visible artifacts.
CONCLUSIONS
These results suggested that arteriography using digital subtraction angiography could reveal the shape and density of blood vessels in canine animal models. This method has great potential to significantly improve research related to limb ischemia due to its simple and reproducible results.
Topics: Angiography, Digital Subtraction; Animals; Dogs; Femoral Artery; Hindlimb; Humans; Ischemia; Lower Extremity
PubMed: 34080448
DOI: 10.1177/17085381211020927 -
Minimally Invasive Therapy & Allied... 2015To evaluate hemodynamics by arteriographic examinations with and without CT in the stomach wall and liver after preoperative embolization to redistribute blood flow to...
OBJECTIVE
To evaluate hemodynamics by arteriographic examinations with and without CT in the stomach wall and liver after preoperative embolization to redistribute blood flow to the stomach and liver, which is unified to be supplied from the superior mesenteric artery, before distal pancreatectomy with en bloc celiac axis resection (DP-CAR).
MATERIAL AND METHODS
In six patients with locally advanced cancer of the pancreatic body in whom DP-CAR was planned, the left gastric artery and common hepatic artery were embolized with coils. Celiac arteriography and superior mesenteric arteriography with and without CT were performed after embolization.
RESULTS
In all six patients, intrahepatic arteries and the left gastric artery were not visualized on celiac arteriography. On both superior mesenteric arteriography and CT obtained while contrast medium was infused via the superior mesenteric artery and which was performed immediately after embolization procedures, the right gastric artery, gastroepiploic artery, gastroduodenal artery, and all hepatic arterial branches were clearly detected. Also the distal part of the left gastric artery close to the embolized point was detected with at least one of the imaging modalities.
CONCLUSION
It was clarified radiologically that preoperative embolization results in increased blood supply to the stomach wall and liver through the pancreatic arcade.
Topics: Aged; Angiography; Celiac Artery; Contrast Media; Embolization, Therapeutic; Female; Hepatic Artery; Humans; Liver; Male; Mesenteric Artery, Superior; Pancreatectomy; Pancreatic Neoplasms; Retrospective Studies; Stomach; Tomography, X-Ray Computed
PubMed: 25854119
DOI: 10.3109/13645706.2015.1034729 -
RoFo : Fortschritte Auf Dem Gebiete Der... Feb 2020Peripheral vascular anomalies represent a rare disease with an underlying congenital mesenchymal and angiogenetic disorder. Vascular anomalies are subdivided into...
BACKGROUND
Peripheral vascular anomalies represent a rare disease with an underlying congenital mesenchymal and angiogenetic disorder. Vascular anomalies are subdivided into vascular tumors and vascular malformations. Both entities include characteristic features and flow dynamics. Symptoms can occur in infancy and adulthood. Vascular anomalies may be accompanied by characteristic clinical findings which facilitate disease classification. The role of periinterventional imaging is to confirm the clinically suspected diagnosis, taking into account the extent and location of the vascular anomaly for the purpose of treatment planning.
METHOD
In accordance with the International Society for the Study of Vascular Anomalies (ISSVA), vascular anomalies are mainly categorized as slow-flow and fast-flow lesions. Based on the diagnosis and flow dynamics of the vascular anomaly, the recommended periinterventional imaging is described, ranging from ultrasonography and plain radiography to dedicated ultrafast CT and MRI protocols, percutaneous phlebography and transcatheter angiography. Each vascular anomaly requires dedicated imaging. Differentiation between slow-flow and fast-flow vascular anomalies facilitates selection of the appropriate imaging modality or a combination of diagnostic tools.
RESULTS
Slow-flow congenital vascular anomalies mainly include venous and lymphatic or combined malformations. Ultrasound and MRI and especially MR-venography are essential for periinterventional imaging. Arteriovenous malformations are fast-flow vascular anomalies. They should be imaged with dedicated MR protocols, especially when extensive. CT with 4D perfusion imaging as well as time-resolved 3D MR-A allow multiplanar perfusion-based assessment of the multiple arterial inflow and venous drainage vessels of arterio-venous malformations. These imaging tools should be subject to intervention planning, as they can reduce procedure time significantly. Fast-flow vascular tumors like hemangiomas should be worked up with ultrasound, including color-coded duplex sonography, MRI and transcatheter angiography in case of a therapeutic approach. In combined malformation syndromes, radiological imaging has to be adapted according to the dominant underlying vessels and their flow dynamics.
CONCLUSION
Guide to evaluation of flow dynamics in peripheral vascular anomalies, involving vascular malformations and vascular tumors with the intention to facilitate selection of periinterventional imaging modalities and diagnostic and therapeutic approach to vascular anomalies.
KEY POINTS
· Peripheral vascular anomalies include vascular malformations and vascular tumors. Both entities represent a rare disease with an underlying congenital mesenchymal or angiogenetic disorder. · The role of periinterventional imaging is confirmation of the diagnosis by assessing the flow dynamics of the vascular anomaly. · Slow-flow congenital vascular anomalies include venous, lymphatic and venolymphatic malformations. Arteriovenous malformations are fast-flow vascular anomalies, whereas hemangiomas are fast-flow vascular tumors that are frequently associated with fast-flow arteriovenous shunts. The periinterventional imaging modalities of choice include dedicated MR protocols and CT with 4D perfusion imaging as well as invasive transcatheter angiography..
CITATION FORMAT
· Sadick M, Overhoff D, Baessler B et al. Peripheral Vascular Anomalies - Essentials in Periinterventional Imaging. Fortschr Röntgenstr 2020; 192: 150 - 162.
Topics: Angiography; Computed Tomography Angiography; Four-Dimensional Computed Tomography; Hemodynamics; Humans; Magnetic Resonance Angiography; Perfusion Imaging; Phlebography; Tomography, X-Ray Computed; Ultrasonography; Vascular Malformations
PubMed: 31622988
DOI: 10.1055/a-0998-4300 -
Neurology Jan 2017
Topics: Cerebral Angiography; Cerebrovascular Disorders; Headache Disorders, Primary; Humans; Magnetic Resonance Angiography; Steroids; Vasoconstriction; Vasospasm, Intracranial
PubMed: 27940649
DOI: 10.1212/WNL.0000000000003521 -
Vestnik Oftalmologii 2022This review of literature presents an assessment of circulatory disorders of the optic nerve and the retina in patients with optic neuropathy of different origin by... (Review)
Review
This review of literature presents an assessment of circulatory disorders of the optic nerve and the retina in patients with optic neuropathy of different origin by ultrasound and OCTA methods, outlines basic principles of analyzing the state of blood flow in the ocular vessels, and analyzes the results of Russian and foreign research on this topic.
Topics: Angiography; Fluorescein Angiography; Humans; Optic Disk; Optic Nerve Diseases; Tomography, Optical Coherence; Ultrasonography, Doppler
PubMed: 35801892
DOI: 10.17116/oftalma2022138031132 -
Catheterization and Cardiovascular... Dec 2017The benefits of nitroglycerin are numerous, from ensuring accurate interpretation of diagnostic angiograms to treatment of coronary spasm and support of PCIs in simple...
The benefits of nitroglycerin are numerous, from ensuring accurate interpretation of diagnostic angiograms to treatment of coronary spasm and support of PCIs in simple or complex lesion types. The founders of the field were convinced that no coronary arteriography should be considered complete unless a vasodilator is used at some point during the study. This recommendation is valid. The guidelines should change to include administration of intracoronary nitroglycerin.
Topics: Coronary Angiography; Coronary Vasospasm; Coronary Vessels; Humans; Nitroglycerin; Percutaneous Coronary Intervention; Spasm; Vasodilator Agents
PubMed: 29226572
DOI: 10.1002/ccd.27424 -
Investigative Radiology Jul 2019Our aim was to investigate the feasibility of digital variance angiography (DVA) in lower extremity CO2 angiography and to compare the quantitative and qualitative... (Observational Study)
Observational Study
OBJECTIVES
Our aim was to investigate the feasibility of digital variance angiography (DVA) in lower extremity CO2 angiography and to compare the quantitative and qualitative performance of the new image processing technique with that of the current reference standard digital subtraction angiography (DSA).
MATERIALS AND METHODS
This prospective study enrolled 24 patients (mean age ± SD, 65.5 ± 9.2 years; 14 males, 65.1 ± 7.5 years; 10 females, 66.1 ± 11.6 years) undergoing lower-limb CO2 angiography between December 2017 and April 2018 at 2 clinical centers: The Heart and Vascular Center (HVC) of Semmelweis University, Budapest (7 patients), and the Bács-Kiskun County Hospital (BKCH) in Kecskemét (17 patients). The interventional protocol was similar at both sites, but the image acquisition instruments and protocols were different, which allowed us to investigate DVA in different settings. For comparison, the signal-to-noise ratio (SNR) of DSA and DVA images were calculated. The visual quality of DSA and DVA images were compared by independent clinical specialists using an online questionnaire. Interrater agreement was characterized by percent agreement and Fleiss kappa. The specialists also evaluated in a random and blinded manner the individual DSA and DVA images on a 5-grade scale ranging from poor (1) to outstanding (5) image quality, and the mean ± standard error of mean (SEM) was calculated.
RESULTS
A total of 4912 regions of interest were carefully selected in 110 image pairs to determine the SNRs. The ratio of SNRDVA/SNRDSA was calculated. At HVC, it ranged between 2.58 and 4.16 in the anatomical regions (abdominal, iliac, femoral, popliteal, crural, talar), and the overall median value was 3.53, whereas at BKCH the range was 2.71 to 4.92 and the overall median value was 4.52. During the visual evaluation, 120 DSA and DVA image pairs were compared. At HVC in 78%, although at BKCH in 90% of comparisons, it was judged that DVA provided higher quality images. The interrater agreement was 88% (P < 0.001) and 90% (P < 0.01), respectively. DVA images received consistently higher individual rating than DSA images, regardless of the research site and anatomical region. At HVC, the overall DSA and DVA scores (mean ± SEM) were 2.75 ± 0.12 and 3.23 ± 0.16, respectively (P < 0.05), whereas at BKCH these values were 2.49 ± 0.10 and 3.03 ± 0.09, respectively (P < 0.001).
CONCLUSIONS
These data show that lower-limb CO2 angiography DVA, regardless of the image acquisition instruments and protocols, produces higher SNR and significantly better image quality than DSA; therefore this new image processing technique might help the widespread use of CO2 as a safer contrast agent in clinical practice.
Topics: Aged; Angiography; Angiography, Digital Subtraction; Carbon Dioxide; Contrast Media; Female; Humans; Image Processing, Computer-Assisted; Male; Prospective Studies; Signal-To-Noise Ratio
PubMed: 30829769
DOI: 10.1097/RLI.0000000000000555