Minimally Invasive Surgery and rtPA for Intracerebral Hemorrhage Evacuation (MISTIE)

Daniel Hanley

Status and phase: Completed; Phase 2

Conditions: Intracerebral Hemorrhage

Treatments: Drug: MIS+Cathflo Activase (drug); Procedure: Intraoperative stereotactic CT-Guided Endoscopic Surgery

Study type: Interventional

Funder types: Other; Industry; NIH

Identifiers

NCT00224770

R01NS046309 (U.S. NIH Grant/Contract)

ICH01

Details and patient eligibility

About

The purpose of this trial is to determine the safety of using a combination of minimally invasive surgery and clot lysis with rt-PA to remove intracerebral hemorrhage (ICH). The ICES arm of the trial will determine the safety of endoscopic surgery to remove ICH. All MISTIE intention to treat subjects represent the hypothesized test group. The ICES cohort is to be analyzed separately.

Full description

The purpose of this trial is to determine the safety of using a combination of minimally invasive surgery and clot lysis with rt-PA to remove intracerebral hemorrhage (ICH). The procedure is to use image-based surgery (MRI or CT) to provide catheter access to ICH for the intervention, which is a one-time clot aspiration followed by instillation of rt-PA over 72 hours.

The Intraoperative stereotactic CT-guided Endoscopic Surgery (ICES) arm of the trial will determine the safety, feasibility and effectiveness of endoscopic surgery to remove ICH. This tests the first step of the MISTIE surgical procedure with an endoscope, not a rigid cannula.

We propose to test if these interventions facilitate more rapid and complete recovery of function and decreased mortality from this condition compared to conventional medical management without subjecting the patient to craniotomy. The specific objective of this trial is to test the safety of these interventions and assess their ability to remove blood clot from brain tissue.

Enrollment: 141 patients

Sex: All

Ages: 18 to 80 years old

Volunteers: No Healthy Volunteers

Inclusion criteria

• Age 18-80
• GCS < 14 or a NIHSS > or equal to 6
• Spontaneous supratentorial ICH > or equal to 20cc
• Symptoms less than 12 hours prior to diagnostic CT scan (an unknown time of symptom onset is exclusionary)
• Intention to initiate surgery within 48 hours after diagnostic CT
• First dose can be given within 54 hours after diagnostic CT (delays for post surgical stabilization of catheter bleeding or because of unanticipated surgical delay are acceptable with approved waiver from the coordinating center) (Does not apply to ICES Tier)
• Six-hour clot size equal to the most previous clot size + 5 cc (as determined by an additional CT scan at least 6 hours after the initial stability scan (A*B*C)/2 method)
• SBP < 200 mmHg sustained for 6 hours recorded closest to time of randomization
• Historical Rankin score of 0 or 1
• Negative pregnancy test

Exclusion criteria

• Infratentorial hemorrhage (any involvement of the midbrain or lower brainstem as demonstrated by radiograph or complete third nerve palsy)
• Patients with platelet count < 100,000, INR > 1.4, or an elevated PT or APTT (reversal of coumadin is permitted but the patient must not require coumadin during the acute hospitalization). Irreversible coagulopathy either due to medical condition or prior to randomization
• Clotting disorders
• Any concurrent serious illness that would interfere with the safety assessments including hepatic, renal, gastroenterologic, respiratory, cardiovascular, endocrinologic, immunologic, and hematologic disease
• Patients with a mechanical valve
• Patients with unstable mass or evolving intracranial compartment syndrome
• Ruptured aneurysm, AVM, vascular anomaly
• Greater than 80 years (higher incidence of amyloid)
• Under 18 years of ag e (high incidence of occult vascular malformation)
• Pregnant (positive pregnancy test) or lactating females (likelihood of altered coagulation function associated with the high estrogen/progesterone state)
• Irreversibly impaired brainstem function (bilateral fixed, dilated pupils and extensor motor posturing), GCS less than or equal to 4
• Historical Rankin score greater than or equal to 2
• Intraventricular hemorrhage requiring external ventricular drainage
• Internal bleeding, involving retroperitoneal sites, or the gastrointestinal, genitourinary, or respiratory tracts (Does not apply to ICES Tier)
• Superficial or surface bleeding, observed mainly at vascular puncture and access sites (e.g., venous cutdowns, arterial punctures) or site of recent surgical intervention (Does not apply to ICES Tier)
• Known risk for embolization, including history of left heart thrombus, mitral stenosis with atrial fibrillation, acute pericarditis, and subacute bacterial endocarditis (Does not apply to ICES Tier)
• In the investigator's opinion, the patient is unstable and would benefit from a specific intervention rather than supportive care plus or minus MIS+rtPA
• Prior enrollment in the study
• Any other condition that the investigator believes would pose a significant hazard to the subject if the investigational therapy were initiated
• Participation in another simultaneous trial of ICH treatment.

Trial design

Primary purpose: Treatment

Allocation: Randomized

Interventional model: Parallel Assignment

Masking: None (Open label)

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141 participants in 3 patient groups

Medical Management

No Intervention group

Description:

Standard of care medical management as per American Heart Association (AHA) guidelines.

MISTIE Surgical Management

Active Comparator group

Description:

Minimally invasive surgery (MIS) with clot lysis with recombinant tissue plasminogen activator (rt-PA). MIS+Cathflo Activase (drug): The intervention is a comparison of the safety and preliminary effectiveness of investigational minimally invasive surgery to place a catheter into an intracerebral hemorrhage blood clot and subsequent administration in sequential tiers of 0.3 or 1.0mg of rt-PA, CathFlo®) through the catheter once every eight hours for up to 72 hours, in addition to best medical care. This includes 54 intent-to-treat patients, and excludes 27 pilots.

Treatment:

Drug: MIS+Cathflo Activase (drug)

ICES Surgical Management

Active Comparator group

Description:

Intraoperative stereotactic CT-Guided Endoscopic Surgery Mechanical intracerebral hemorrhage removal via an endoscope utilizing the same operative-targeting arm as MISTIE arm. Best medical care was provided, but no rt-PA was administered. This includes 14 intent-to-treat patients, and excludes 4 pilots.

Treatment:

Procedure: Intraoperative stereotactic CT-Guided Endoscopic Surgery