Table 1.

Summary of the clinical data

No.	Age	Gender	Preoperative HH	Site	Arterial blood flow after the internal carotid artery was pressed*	Clipping method	Intraoperative rupture and hemorrhage	Intraoperative stenosis of the parent artery	Intraoperative arterial ultrasonography**	Postoperative DSA or CTA of the parent artery	Prognosis
1	46	Female	II	Dorsal side of the supraclinoid segment	Reduced by 30%	A Single curved clip	No	No	Adequate blood flow	No vascular stenosis	Good
2	51	Female	II	Internal and inferior side of the supraclinoid segment	Reduced by 20%	A single cross-vascular clip	No	No	Adequate blood flow	No vascular stenosis	Good
3	31	Male	II	Internal and inferior side of the supraclinoid segment	Reduced by 30%	A single cross-vascular clip	No	Yes	Adequate blood flow	30% stenosis	Good
4	45	Female	II	Internal side of the supraclinoid segment	Reduced by 30%	A single straight clip	No	Yes	Adequate blood flow	20% stenosis	Good
5	48	Female	III	Dorsal side of the supraclinoid segment	Reduced by 40%	A single curved clip	Yes	No	Adequate blood flow	No vascular stenosis	Good
6	52	Female	II	Dorsal side of the supraclinoid segment	Reduced by 20%	A single straight clip	No	No	Adequate blood flow	No vascular stenosis	Good
7	50	Female	III	Dorsal side of the supraclinoid segment	Reduced by 30%	Two curved clips	Yes	Yes	Adequate blood flow	No vascular stenosis	Good
8	57	Female	II	Internal side of the supraclinoid segment	Reduced by 20%	Two curved clips	Yes	No	Adequate blood flow	No vascular stenosis	Good
9	41	Female	III	Dorsal and internal side of the supraclinoid segment	Reduced by 30%	A single curved clip	No	Yes	Adequate blood flow	50% stenosis	Good

HH: Hunt-Hess classification;

^*The BBA side of the internal carotid artery was pressed to examine the decrease in blood flow at the BBA side of the middle cerebral artery;

^**Intraoperative arterial ultrasonography: the blood flow in the parent artery, middle cerebral artery and anterior cerebral artery was examined.