The carotid sinus is located at the beginning of the common and internal carotid arteries. The body position is in the middle of the lateral neck, opposite the level of the superior border of the thyroid cartilage, where the carotid fluctuations are most pronounced.
The carotid sinus is the dilated part of the common carotid artery at its branches and at the beginning of the internal carotid artery, opposite the level of the superior border of the thyroid cartilage, one on each side of the neck, the size of a soybean. The carotid arteries can be found in the supine position, below the angle of the lower jaw, and a soybean-sized bulge can be felt, which is the location of the carotid sinus.
Carotid sinus is a pressure receptor, mainly feel the blood pressure changes, can play a role in regulating blood pressure and heart rate. When blood pressure rises, the carotid sinus can be stimulated, will have the effect of lowering blood pressure and slowing the heart rate. When the blood pressure drops, it will reflexively cause the heart rate to increase and the blood pressure to rise. Strong external stimulation will cause carotid sinus syndrome, nausea, fatigue, vomiting, dizziness, tinnitus and other symptoms, serious cases can lead to fainting or cardiac arrest and other consequences.
Need to pay attention to: massage to avoid the carotid sinus, at the same time can not be bilateral pressure, and should not be too strong, otherwise there will be a risk of asphyxiation.