The objective of this study is to further demonstrate safety and characterize effectiveness of the Neurapheresis™ System (extracorporeal system and catheter) to remove red blood cells (RBCs) and lysed blood by-products from hemorrhagic cerebrospinal fluid (CSF) following aneurysmal subarachnoid hemorrhage (aSAH).



Eligible Ages
Between 18 Years and 70 Years
Eligible Genders
Accepts Healthy Volunteers

Inclusion Criteria

  • Modified Fisher Grade 2, 3 or 4
  • Hunt & Hess I-IV
  • First aneurysmal SAH
  • Patient is ≤ 48 hours post bleeding event
  • World Federation of Neurosurgeons (WFNS) Grades I-IV

Exclusion Criteria

  • Pregnancy
  • Patients with a SAH due to mycotic aneurysm or AV malformation
  • Patients who present with an acute MI or unstable angina
  • Imaging demonstrates supratentorial mass lesions greater than 50 cc
  • Imaging demonstrates more than 5 mm of mid-line-shift associated with infarction and or edema
  • Effacement of the basilar cisterns
  • Vasospasm on admission as defined by angiographic evidence
  • Patients with a coagulopathy that cannot be reversed
  • Thrombocytopenia def. platelet count < 100,000
  • Patients on low molecular weight heparin such as Lovenox
  • Non-communicating Obstructive hydrocephalus
  • Existing hardware that prevents accurate CT imaging
  • Pre-existing Lumbar Drain
  • Local skin infections or eruptions over the puncture site
  • Signs of CNS systemic infection, sepsis or pneumonia

Study Design

Study Type
Intervention Model
Single Group Assignment
Primary Purpose
None (Open Label)

Arm Groups

ArmDescriptionAssigned Intervention
Neurapheresis System
CSF filtration
  • Device: Neurapheresis System
    CSF filtration system and lumbar catheter

Recruiting Locations

Memorial Hermann
Houston, Texas 77001
Julie Messer

More Details


Study Contact

Julie Messer

Detailed Description

The PILLAR-XT study is designed to further confirm safety and characterize efficacy of Neurapheresis therapy. The study works in tandem with the current SOC treatments for SAH and does not detract from the established care pathways, or deny enrolled subjects proven therapies. The PILLAR-XT study utilizes the established skill sets of chosen Investigators who are already trained in the treatment and care of SAH patients and insertion/management of lumbar drains.


Study information shown on this site is derived from ClinicalTrials.gov (a public registry operated by the National Institutes of Health). The listing of studies provided is not certain to be all studies for which you might be eligible. Furthermore, study eligibility requirements can be difficult to understand and may change over time, so it is wise to speak with your medical care provider and individual research study teams when making decisions related to participation.