Intraoperative Angiography
Intraoperative Angiography - Related Videos
18:50
Microsurgical Clip Obliteration of Middle Cerebral Aneurysm Using Intraoperative Flow Assessment
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Cited by 3 •
2009
Description of the surgical obliteration of a cerebral aneurysm utilizing an ultrasonic flow probe to assess arterial flow prior to and after aneurysm clip placement.
10:31
Intraoperative Gastroscopy for Tumor Localization in Laparoscopic Surgery for Gastric Adenocarcinoma
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Cited by 12 •
2016
In early gastric cancer, the aim of surgery is to precisely remove the distal stomach including the primary tumor. To do this, accurate localization of the tumor is crucial, especially in totally laparoscopic surgery. This protocol describes a procedure for intraoperative gastroscopy in totally laparoscopic subtotal gastrectomy.
01:17
Time-of-Flight Magnetic Resonance Angiography to Visualize Blood Vasculature
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2025
Position the patient's head inside the radiofrequency, or RF, coil of a magnetic resonance imaging, or MRI, machine.Initiate the time-of-flight magnetic resonance angiography or TOF MRA, a non-invasive technique for visualizing blood vessels.Select a tissue slice for imaging to visualize arteries and veins.Apply an RF pulse to excite the protons within the selected imaging slice. These protons release energy, which is detected as an MR signal.Repeated application of RF pulses saturates the MR...
01:22
Detection of Internal Carotid Artery Narrowing Using Digital Subtraction Angiography
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2025
Position a human patient with internal carotid stenosis, a condition characterized by narrowing of the internal carotid artery, on the imaging table for digital subtraction angiography (DSA). Insert an angiocatheter into the common carotid artery at the fourth cervical vertebra level. Capture a pre-contrast X-ray image to record background structures like bones and soft tissues using X-ray irradiation. Administer an iodine-based contrast medium into the carotid artery. The contrast medium...
05:53
Intraoperative Ultrasound in Spinal Surgery
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2022
Here, we present a protocol on the use of intraoperative ultrasound in spinal surgery, particularly in cases of intradural lesions and lesions in the ventral spinal canal when using a posterior approach.
FAQs
The contrast agent makes the circulating blood column visible against surrounding tissues, allowing images to show vessel anatomy and blood flow. This enables assessment of whether vessels remain open, whether circulation follows the expected pathway, and whether an abnormal area still fills with contrast. These findings provide direct information about the vascular result of the operation.
Neurosurgical systems may use digital subtraction angiography or indocyanine green fluorescence to visualize vascular structures during an operation. Both support evaluation of vessel preservation and treatment results, but the overview does not specify that they provide identical image characteristics or require the same equipment. Their shared role is to supply vascular information before surgical closure.
Residual filling indicates that an abnormal vascular target may not be completely excluded from circulation. Detecting this finding while the operation is still underway gives the surgical team an opportunity to reassess the treatment rather than discovering the issue after closure. This is particularly relevant when evaluating cerebral aneurysms, arteriovenous malformations, or related cerebrovascular disorders.
The workflow begins by introducing a contrast agent into the circulation during surgery. The imaging system then acquires vascular images, which are examined for blood flow, vessel anatomy, patency, and abnormal residual filling. Clinicians use these findings to confirm the treatment result and guide decisions before completing and closing the operation.
Its main neuroscience applications include surgery for cerebral aneurysms, arteriovenous malformations, and other cerebrovascular disorders. In these settings, the technique helps clinicians determine whether the intended vascular lesion has been adequately treated while confirming that important surrounding vessels remain preserved. The information can therefore influence management during the same surgical procedure.
Clinicians can evaluate whether vessels remain patent, whether expected blood flow is present, and whether an aneurysm, arteriovenous malformation, or other abnormal vascular region continues to fill. This immediate assessment helps identify undetected vascular complications before closure, when findings can still guide surgical decisions and improve confidence in the completed treatment.