Lumenate Observational Vasospasm Interventional Trial (LOVIT)

Inclusion Criteria: 1. Age ≥ 18 2. Subject has the necessary mental capacity to participate and is willing and able to comply with protocol requirements 3. Patient has suffered SAH from a ruptured intracranial aneurysm 4. Has mWFNS ≤3 upon admission to the treating hospital or mWFNS ≤3 after insertion of an endoventricular drain (EVD) for acute hydrocephalus secondary to SAH. 5. Subject has provided written informed consent using the IRB/Ethics committee-approved consent form and are willing to comply with the study protocol and planned follow-ups. 6. Patients that develop symptoms of cerebral vasospasm, as determined by the physician, and/or have diagnostic (e.g. TCD) or radiological evidence of moderate/severe vasospasm. Exclusion Criteria: 1. Patients that have angiographically confirmed (CTA/MRA) vasospasm at admission to the treating hospital 2. Subjects who require surgical treatment of culprit aneurysm. 3. Endovascular treatment of culprit aneurysm resulting in severe procedural complication (e.g., vessel rupture, embolization or other complication). 4. Placement of intraluminal stent or flow diverter is used to treat culprit aneurysm. 5. Intraluminal stent or flow diverter placed in the 6 months prior to culprit aneurysm rupture. 6. Treated with Intra Arterial vasodilators prior to Lumenate procedure 7. Receiving Anti-coagulant with half-life longer than 24 hours, or Dual antiplatelet therapy (DAPT) including P2Y12 inhibition 8. Woman of child-bearing potential who cannot provide a negative pregnancy test. 9. Patients with vasculitis or connective tissue disorders that put them at risk for vasculitis. 10. Known use of cocaine or methamphetamine within the last month. 11. Any comorbid disease or medical condition with a life expectancy ≤3 months. 12. Known allergy or contraindication to aspirin, heparin, local or general anesthesia 13. Known history of life threatening allergy to contrast dye 14. Serum creatinine ≥2.5 mg/dL 15. Enrollment in another trial involving an investigational product 16. Physician discretion that the patient may not benefit from treatment with Lumenate - reason for exclusion should be documented.