MedTach
Bringing Innovations to Canadian Clinicians and Researchers
  • Home
    • Updates
  • Products
    • Finapres Continuous Blood Pressure >
      • Hypertension Information
      • Finapres Nova - Products
      • Finapres Nova - Hardware >
        • Finapres Nova - Basic
        • Finapres Nova - ECG + RESP
        • Finapres Nova - Full Option
      • Finapres Nova - Software >
        • Guided Autonomic Testing (GAT)
        • Advanced Hemodynamics
        • Autonomic Testing
      • Finapres Nova - Application Fields >
        • Autonomic Failure Diagnosis >
          • Autonomic Failure Diagnosis
        • Hemodynamic Evaluation
        • Education with Finapres
        • Other Finapres Applications
      • Technologies - Finapres >
        • Volume-Clamp: Continuous BP Method
        • Nano Core Technology - Finapres
        • Height Correction Unit - Finapres
        • Physiocal Signal Quality Indicator - Finapres
        • Compare all Finapres Products
    • Delica Transcranial Doppler
    • Caretaker Wireless ICU Grade Vital Signs >
      • VitalStream
      • Caretaker News
      • Virtual Hospital Monitoring
      • Caretaker How To Use
    • TempTraq Real-Time Fever Detection Patch
    • Bittium Faros ECG Cardiac Holter >
      • Faros Waterproof ECG
      • Cardiac Navigator Holter Analysis
      • HolterPlus Remote Cardiac Monitoring
      • Cardioscope Autonomic Testing
    • Schiller ABPM and Cardiac Holter >
      • Schiller BR-102 plus PWA
      • Schiller BR-102 plus
      • Schiller medilogAR ECG Holter
      • Schiller Cardiovit FT1
    • RespiraSense Continuous Respiratory Rate Monitor
    • Kinesis Mobility & Fall Probability >
      • QTUG
      • Gait
      • Balance
    • Carrot C-Com Wireless Headset >
      • C-Com Wireless Headset
      • C-Suite
    • FIAB Transesophageal Cardiac Pacing >
      • FIAB Eso Temp Monitor
      • FIAB Eso Leads
  • Support
    • Telemedicine
    • Finapres FAQ
    • Bittium Support
    • Kinesis Setup & FAQ
  • Contact Us
    • Who We Are
To All MedTach Solutions
Back to All TCD Solutions
Contact Us About Delica TCDs
Picture
Picture
Picture
HITS Monitoring
PFO Application
Stroke Evaluation
Intraoperative Application
Critical Care Monitoring
Cerebral Autoregulation Application
Syncope
Intraoperative Application
Intraoperative microvascular Doppler ultrasonography in cerebral aneurysm surgery​
Objectives—Outcome of surgical treatment of cerebral aneurysms may be severely compromised by local cerebral ischaemia or infarction resulting from the inadvertent occlusion of an adjacent vessel by the aneurysm clip, or by incomplete aneurysm closure. It is therefore mandatory to optimise clip placement in situ to reduce the complication rate. The present study was performed to investigate the reliability of intraoperative microvascular Doppler ultrasonography (MDU) in cerebral aneurysm surgery, and to assess the impact of this method on the surgical procedure itself
Methods—Seventy five patients (19 men, 56 women, mean age 54.8 years, range 22-84 years) with 90 saccular cerebral aneurysms were evaluated. Blood flow velocities in the aneurysmal sac and in the adjacent vessels were determined by MDU before and after aneurysm clipping. The findings of MDU were analysed and compared with those of visual inspection of the surgical site and of postoperative angiography. Analysis was also made of the cases in which the clip was repositioned due to MDU findings. Results—A relevant stenosis of an adjacent vessel induced by clip positioning that had escaped detection by visual inspection was identified by Doppler ultrasonography in 17 out of 90 (18.9%) aneurysms. In addition, Doppler ultrasound demonstrated a primarily unoccluded aneurysm in 11 out of 90 (12.2%) patients. The aneurysm clip was repositioned on the basis of the MDU findings in 26 out of 90 (28.8%) cases. In middle cerebral artery (MCA) aneurysms, the MDU results were relevant to the surgical procedure in 17 out of 44 (38.6%) cases. Whereas with aneurysms of the anterior cerebral artery significant findings occurred in only five of 32cases (15.6%; p<0.05). The clip was repositioned on the basis of the MDU results in 18 out of 50 (36%) aneurysms in patients with subarachnoid haemorrhage (SAH) grade I-V compared with only eight out of 40 (20%) aneurysms in patients without SAH (p<0.05).
Conclusions—MDU should be used routinely in cerebral aneurysm surgery, especially in cases of MCA aneurysms and after SAH. Present data show that a postoperative angiography becomes superfluous whenever there is good visualisation of the “working site” and MDU findings are clear.
Global Reference Sites Using Delica TCDs
Contact us
MedTach Inc.
Head Office
​4145 North Service Rd., Suite 200
Burlington, Ontario, Canada L7L 6A3
1-289-644-4985 |
[email protected]


Copyright © 2025 MedTach. ​All Rights Reserved.
Contact Us