Table 1

Indications	Contraindications*	Absolute vs relative contraindication
Large and/or deep aneurysms in narrow corridors where temporary clip ligation is difficult or not possible	Severe reactive airway disease	Absolute
In synergy with temporary clipping, especially during intraoperative aneurysmal rupture	Severe coronary artery disease	Absolute
Instances in which temporary clipping fails	Pre-existing cardiac conduction abnormalities	Relative
To improve visualisation of adjacent perforating arteries	Allergy	Relative
	Dipyridamole, methylxanthines and nimodipine inhibit adenosine breakdown and uptake and can increase levels	Relative
	Calcified or fibrotic aneurysmal wall/dome	Relative