Key result
Carotid endarterectomy significantly increased internal carotid artery flow by 54% (P<0.01) and decreased resistance by 58% (P=0.01) compared to preoperative values.
Why the study?
Does carotid endarterectomy improve carotid artery blood flow and resistance as measured by a Doppler ultrasonographic flowmeter in patients with symptomatic ICA stenosis?
Observational (n=47)
Does carotid endarterectomy improve carotid artery blood flow and resistance as measured by a Doppler ultrasonographic flowmeter in patients with symptomatic ICA stenosis?
Doppler ultrasonographic flow measurement demonstrates immediate significant increases in ICA flow and decreases in resistance following carotid endarterectomy, providing a simple method for intraoperative quality control.
May support intraoperative Doppler for CEA quality control; leaves open links to clinical outcomes.
A study was performed to evaluate immediate changes in carotid artery blood flow after carotid endarterectomy using a Doppler ultrasonographic flowmeter. Forty-seven consecutive patients aged 49-78 (median 64) years with symptomatic internal carotid artery (ICA) stenosis underwent carotid endarterectomy. Volume flow, resistance and pulsatility index were measured in the common carotid artery (CCA) and ICA both before and after operation. ICA flow increased by 54 per cent (P < 0.01) and resistance decreased by 58 per cent (P = 0.01). CCA flow rose by 17 per cent (P = 0.1) and resistance fell by 21 per cent (P = 0.02). The pulsatility index did not change significantly. The Doppler ultrasonographic flowmeter offers a simple, non-invasive and convenient means of improving understanding of the immediate haemodynamic effects of carotid endarterectomy. It is useful in everyday practice to confirm the adequacy of endarterectomy, particularly in the absence of other methods of quality control. Duplex ultrasonography might still be necessary after surgery if the flowmeter does not demonstrate an increase in flow compared with the preoperative value.
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Whyman et al. (1994) conducted an observational in Symptomatic internal carotid artery (ICA) stenosis (n=47). Carotid endarterectomy vs. Preoperative baseline was evaluated on Immediate changes in internal carotid artery (ICA) blood flow (54% increase, p=< 0.01). Carotid endarterectomy significantly increased internal carotid artery flow by 54% (P<0.01) and decreased resistance by 58% (P=0.01) compared to preoperative values.
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