scholarly journals Investigation Concerning Use of Near-infrared Spectroscopy-based Device to Evaluate Hyperperfusion Phenomenon after Carotid Artery Stenting

2017 ◽  
Vol 45 (1) ◽  
pp. 1-6
Author(s):  
Yohei SATO ◽  
Osamu TONE ◽  
Mutsuya HARA ◽  
Jun KARAKAMA ◽  
Hideko HASHIMOTO ◽  
...  
Keyword(s):  
Infrared Spectroscopy ◽  
Carotid Artery ◽  
Near Infrared Spectroscopy ◽  
Carotid Artery Stenting ◽  
Near Infrared

Near-infrared spectroscopy carotid plaque characteristics and cerebral embolism in carotid artery stenting

2021 ◽  
Vol 17 (7) ◽  
pp. 599-606
Author(s):  
Ichiro Nakagawa ◽  
Masashi Kotsugi ◽  
Hun Soo Park ◽  
Takanori Furuta ◽  
Fumiya Sato ◽  
...  
Keyword(s):  
Infrared Spectroscopy ◽  
Carotid Artery ◽  
Near Infrared Spectroscopy ◽  
Carotid Artery Stenting ◽  
Carotid Plaque ◽  
Near Infrared ◽  
Cerebral Embolism

scholarly journals First-in-man near-infrared spectroscopy proof of lipid-core embolization during carotid artery stenting

2016 ◽  
Vol 4 ◽  
pp. 915-918 ◽  
Author(s):  
Martin Horvath ◽  
Petr Hajek ◽  
James E. Muller ◽  
Jakub Honek ◽  
Cyril Stechovsky ◽  
...  
Keyword(s):  
Infrared Spectroscopy ◽  
Carotid Artery ◽  
Near Infrared Spectroscopy ◽  
Carotid Artery Stenting ◽  
Near Infrared ◽  
Lipid Core

Effectiveness of Near-Infrared Spectroscopy (NIRO-200NX, Pulse Mode) for Risk Management in Carotid Artery Stenting

2019 ◽  
Vol 131 ◽  
pp. e425-e432 ◽  
Author(s):  
Toshitsugu Terakado ◽  
Aiki Marushima ◽  
Yasuaki Koyama ◽  
Wataro Tsuruta ◽  
Tomoji Takigawa ◽  
...  
Keyword(s):  
Risk Management ◽  
Infrared Spectroscopy ◽  
Carotid Artery ◽  
Near Infrared Spectroscopy ◽  
Carotid Artery Stenting ◽  
Near Infrared ◽  
Pulse Mode

scholarly journals Limitation of Near Infrared Spectroscopy Cerebral Oximetry in Predicting Neurologic Intolerance during Carotid Artery Stenting with Proximal Protection

2019 ◽  
Author(s):  
Kanchan Bilgi ◽  
Rajeeb Kumar Mishra ◽  
Aravinda HR ◽  
Keyword(s):  
Blood Flow ◽  
Infrared Spectroscopy ◽  
Cerebral Ischemia ◽  
Carotid Artery ◽  
Near Infrared Spectroscopy ◽  
Carotid Artery Stenting ◽  
Near Infrared ◽  
Cerebral Oximetry ◽  
External Carotid ◽  
Bilateral Carotid

AbstractProximal balloon occlusion prior to carotid artery stenting is considered a relatively safe practice during endovascular treatment of carotid artery stenosis. Transient neurological deterioration affecting the ipsilateral hemisphere is seen soon after balloon inflation, when placed proximal to the stenotic segment. This occurs in cases of bilateral carotid disease due to insufficient collateral blood flow from the contralateral side. Near infrared spectroscopy cerebral oximetry (NIRS) is a valuable tool in detecting hypoperfusion- induced cerebral tissue desaturation (rSO2) during these procedures. This helps the interventional radiologist to deflate the balloon at the earliest to re-establish the cerebral blood flow. The non-invasive nature and continuous real-time interpretation make NIRS an attractive adjunct in the neuroanesthesiolgist's armamentarium for monitoring cerebral ischemia. However, significant contribution from chromophores in the extra-cerebral tissues and external carotid artery circulation can limit its sensitivity during occlusion of the internal carotid artery. In our case, it did not reflect brain ischemia during hypotension and when the neurologic symptoms were obvious. Commonly available cerebral oximetry sensors placed over the frontal region do not cover the parietal lobe where ischemia is likely to occur during occlusion of the carotid artery. In such scenarios, it has been shown that multi-channel NIRS has a better sensitivity in detecting cerebral ischemia. This case report highlights the importance of frequent neurological examination during carotid stenting as rSO2 values might not always suggest cerebral ischemia.

Defining thresholds for critical ischemia by using near-infrared spectroscopy in the adult brain

1998 ◽  
Vol 89 (3) ◽  
pp. 389-394 ◽  
Author(s):  
Peter J. Kirkpatrick ◽  
Joseph Lam ◽  
Pippa Al-Rawi ◽  
Piotr Smielewski ◽  
Marek Czosnyka
Keyword(s):  
Infrared Spectroscopy ◽  
Cerebral Ischemia ◽  
Carotid Artery ◽  
Carotid Endarterectomy ◽  
Near Infrared Spectroscopy ◽  
Near Infrared ◽  
Adult Brain ◽  
Content Type ◽  
Signal Changes ◽  
Fine Print

Object. Signal changes in adult extracranial tissues may have a profound effect on cerebral near-infrared spectroscopy (NIRS) measurements. During carotid surgery NIRS signals provide the opportunity to determine the relative contributions from the intra- and extracranial vascular territories, allowing for a more accurate quantification. In this study the authors applied multimodal monitoring methods to patients undergoing carotid endarterectomy and explored the hypothesis that NIRS can define thresholds for cerebral ischemia, provided extracranial NIRS signal changes are identified and removed. Relative criteria for intraoperative severe cerebral ischemia (SCI) were applied to 103 patients undergoing carotid endarterectomy. Methods. One hundred three patients underwent carotid endarterectomy. An intraoperative fall in transcranial Doppler—detected middle cerebral artery flow velocity (%ΔFV) of greater than 60% accompanied by a sustained fall in cortical electrical activity were adopted as criteria for SCI. Ipsilateral frontal NIRS recorded the total difference in concentrations of oxyhemoglobin and deoxyhemoglobin (Total ΔHbdiff). Interrupted time series analysis following clamping of the external carotid artery (ECA) and the internal carotid artery (ICA) allowed the different vascular components of Total ΔHbdiff (ECA ΔHbdiff and ICA ΔHbdiff) to be identified. Data obtained in 76 patients were deemed suitable. A good correlation between %ΔFV and ICA ΔHbdiff (r = 0.73, p < 0.0001) was evident. Sixteen patients (21%) fulfilled the criteria for SCI. All patients who demonstrated an ICA ΔHbdiff of greater than 6.8 µmol/L showed SCI, and in two patients within this group nondisabling watershed infarction developed, as seen on postoperative computerized tomography scans. No patient with an ICA ΔHbdiff less than 5 µmol/L exhibited SCI or suffered a stroke. Within the resolution of the criteria used an ICA ΔHbdiff threshold of 6.8 µmol/L provided 100% specificity for SCI, whereas an ICA ΔHbdiff less than 5 µmol/L was 100% sensitive for excluding SCI. When Total ΔHbdiff was used without removing the ECA component, no thresholds for SCI were apparent. Conclusions. Carotid endarterectomy provides a stable environment for exploring NIRS-quantified thresholds for SCI in the adult head.

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