Denna sida har översatts automatiskt och översättningens korrekthet kan inte garanteras. Vänligen se engelsk version för en källtext.

Feasibility of ExAblate MRI Guided High Intensity Focused Ultrasound Tx of Soft Tissue Tumors

28 april 2018 uppdaterad av: Pejman Ghanouni

A Feasibility Study to Evaluate the Safety and Effectiveness of ExAblate Magnetic Resonance Imaging Guided High Intensity Focused Ultrasound Treatment of Soft Tissue Tumors of the Extremities

The goal of this project is to evaluate the safety and preliminary efficacy of ExAblate magnetic resonance-guided high-intensity focused ultrasound (MRgHIFU) surgery in the treatment of soft tissue tumors of the extremities.

Studieöversikt

Status

Avslutad

Betingelser

Intervention / Behandling

Detaljerad beskrivning

Given that the incidence of cancer increases with age, the number of elderly patients diagnosed and treated for soft tissue sarcomas (STS) will increase. The dilemma is that surgeons and medical oncologists may be hesitant to treat elderly patients in a comparably intensive manner as is used in the treatment of younger patients; factors such as decreased performance status, significant comorbidities, and disease natural history may erode enthusiasm for aggressive STS resection. To this end, a less invasive way of treating soft tissue tumors would be helpful in younger patients to minimize morbidity and in the elderly to provide less aggressive treatment options. The InSightec ExAblate 2000 magnetic resonance-guided high-intensity focused ultrasound (MRgHIFU) system is a non-invasive thermal ablation device fully integrated with an MR imaging system and used for the ablation of soft tissue (5-10). The ExAblate combines a focused ultrasound surgery (FUS) delivery system and a conventional diagnostic 1.5 T or 3 T MRI scanner. It provides a real-time therapy planning algorithm, thermal dosimetry, and closed-loop therapy control.

Studietyp

Interventionell

Inskrivning (Faktisk)

5

Fas

  • Inte tillämpbar

Kontakter och platser

Det här avsnittet innehåller kontaktuppgifter för dem som genomför studien och information om var denna studie genomförs.

Studieorter

  • Förenta staterna
    • California
      • Stanford, California, Förenta staterna, 94305
        • Stanford University School of Medicine

Deltagandekriterier

Forskare letar efter personer som passar en viss beskrivning, så kallade behörighetskriterier. Några exempel på dessa kriterier är en persons allmänna hälsotillstånd eller tidigare behandlingar.

Urvalskriterier

Åldrar som är berättigade till studier

10 år och äldre (Barn, Vuxen, Äldre vuxen)

Tar emot friska volontärer

Nej

Kön som är behöriga för studier

Allt

Beskrivning

INCLUSION CRITERIA

  • ≥ 10 years of age.
  • Benign or malignant soft tissue tumors of the extremities, flanks, pelvis, or shoulders requiring surgical intervention.
  • Tumor must not have been treated previously with radiation.
  • Targeted tumor(s) are accessible to the ExAblate device
  • Targeted volume within the tumor is located deeper than 1 cm from the skin
  • Targeted tumor is clearly visible by non-contrast magnetic resonance imaging (MRI)
  • Karnofsky Performance Status > 60
  • Normal platelet count and coagulation profile
  • Glomerular filtration rate > 60 mL/min
  • Able to safely undergo MRI exam and receive mild sedation for the treatment.
  • Able to tolerate being in the MRI scanner for the duration of the study.
  • Able and willing to give consent (or consent + assent where applicable), and able to attend all study visits.

EXCLUSION CRITERIA

  • Previous radiation treatment to the tumor.
  • Currently receiving dialysis.
  • Acute medical condition (eg, pneumonia, sepsis) expected to hinder completion of the study

  • Unstable cardiac status including:

    • Unstable angina pectoris on medication
    • Patients with documented myocardial infarction within six months of protocol entry
    • Congestive heart failure requiring medication (other than diuretic)
    • Patients on anti-arrhythmic drugs
  • Severe hypertension (diastolic BP > 100 on medication)
  • Contraindication for MR imaging such as implanted metallic devices that are not MRI-safe, size limitations, etc
  • Severe hematologic, neurologic, or other uncontrolled disease
  • Known intolerance or allergy to medications used for sedation (midazolam), analgesia (fentanyl), and local and regional anesthesia (lidocaine, bupivacaine, and ropivacaine)
  • Known intolerance or allergy to MR contrast agent (gadolinium chelates) including advanced kidney disease
  • Pregnant and nursing
  • Karnofsky Performance Score < 60
  • Severe cerebrovascular disease [cardiovascular accident (CVA) within 6 months]
  • Not able or not willing to tolerate the required prolonged stationary position during treatment (up to 5 hrs of total table time)
  • Target volume in tumor is less than 1 cm from neurovascular bundles, major blood vessels, bowel, or bladder.

  • Targeted tumors:

    • NOT visible by non-contrast MRI, OR
    • NOT accessible to ExAblate device
  • Not a candidate for either regional anesthesia or mild sedation
  • Not be participating in another trial testing other investigational agents or devices

Studieplan

Det här avsnittet ger detaljer om studieplanen, inklusive hur studien är utformad och vad studien mäter.

Hur är studien utformad?

Designdetaljer

  • Primärt syfte: Behandling
  • Tilldelning: N/A
  • Interventionsmodell: Enskild gruppuppgift
  • Maskning: Ingen (Open Label)

Vapen och interventioner

Deltagargrupp / Arm
Intervention / Behandling
Experimentell: MRgHIFU
The InSightec ExAblate 2000 magnetic resonance-guided high-intensity focused ultrasound (MRgHIFU) system is a non-invasive device that is fully integrated with an MR imaging system and used for the ablation of soft tissue. The treatment process begins with the physician acquiring a set of MR images, identifying 1+ target volume(s) of fibroid tissue to be ablated, and drawing the treatment contours. The therapy planning software computes the type and number of sonications required to treat the defined volume while minimizing total treatment time. MR images taken during the sonication provide a diagnostic quality image of the target tissue and a quantitative, real-time temperature map overlay to confirm the therapeutic effect of the treatment. The transducer is then automatically moved to the succeeding treatment point and the process is repeated until the entire volume has been treated. About 100 individual sonications can be delivered over a 3-hour period to complete a treatment.
Enhet: MRgHIFU
The InSightec ExAblate 2000 magnetic resonance-guided high-intensity focused ultrasound (MRgHIFU) system is a non-invasive thermal ablation device fully integrated with an MR imaging system and used for the ablation of soft tissue
Andra namn:
  • ExAblate Magnetic Resonance Imaging Guided High Intensity Focused Ultrasound
Läkemedel: Aspirin
325 mg PO for deep venous thrombosis (DVT) prophylaxis initiated 2 hours prior to magnetic resonance-guided high-intensity focused ultrasound (MRgHIFU) treatment
Andra namn:
  • Ecotrin
Läkemedel: Enoxaparin
40 mg by subcutaneous (SC) administration, for deep venous thrombosis (DVT) prophylaxis initiated 2 hours prior to magnetic resonance-guided high-intensity focused ultrasound (MRgHIFU) treatment
Andra namn:
  • Lovenox

Vad mäter studien?

Primära resultatmått

Resultatmått
Åtgärdsbeskrivning
Tidsram
Overall Safety - Incidence of Any Device-related Adverse Events
Tidsram: 1 week
Safety determined by evaluating for the incidence of any device-related adverse events. Patients will be assessed for pain and limb function, and by clinical examination before and after treatment to collect adverse events related to the treatment. Safety is reported as the total incidence of device-related adverse events.
1 week

Sekundära resultatmått

Resultatmått
Åtgärdsbeskrivning
Tidsram
Adverse Event Severity
Tidsram: 6 months

Safety is further assessed by an evaluation of severity for the treatment-related adverse events, reported as the number of adverse events for each of the Common Terminology Criteria for Adverse Events (CTCAE) v4.0 grades.

CTCAE Severity:

  1. mild
  2. moderate
  3. severe
  4. life-threatening
  5. fatal
6 months
Percent Successful Tumor Ablation
Tidsram: Up to 1 week
In the resected tumor specimen, the volume of the ablated area will be determined by obtaining a digital photograph of each pathology slice. The region of interest corresponding to the ablated area will be traced, and the ablated area will be calculated for each slice and summed. Accuracy is assessed as the percent ablated volume relative to pre-treatment tumor volume.
Up to 1 week

Samarbetspartners och utredare

Det är här du hittar personer och organisationer som är involverade i denna studie.

Sponsor

Pejman Ghanouni

Utredare

  • Huvudutredare: Pejman Ghanouni, MD, PhD, Stanford University
  • Huvudutredare: Raffi Avedian, MD, Stanford University

Studieavstämningsdatum

Dessa datum spårar framstegen för inlämningar av studieposter och sammanfattande resultat till ClinicalTrials.gov. Studieposter och rapporterade resultat granskas av National Library of Medicine (NLM) för att säkerställa att de uppfyller specifika kvalitetskontrollstandarder innan de publiceras på den offentliga webbplatsen.

Studera stora datum

Studiestart

1 maj 2014

Primärt slutförande (Faktisk)

24 mars 2015

Avslutad studie (Faktisk)

24 mars 2015

Studieregistreringsdatum

Först inskickad

15 oktober 2013

Först inskickad som uppfyllde QC-kriterierna

15 oktober 2013

Första postat (Uppskatta)

17 oktober 2013

Uppdateringar av studier

Senaste uppdatering publicerad (Faktisk)

23 maj 2018

Senaste inskickade uppdateringen som uppfyllde QC-kriterierna

28 april 2018

Senast verifierad

1 april 2018

Mer information

Termer relaterade till denna studie

Ytterligare relevanta MeSH-villkor

Andra studie-ID-nummer

  • IRB-26667
  • VAR0095 (Annan identifierare: OnCore)

Plan för individuella deltagardata (IPD)

Planerar du att dela individuella deltagardata (IPD)?

NEJ

Läkemedels- och apparatinformation, studiedokument

Studerar en amerikansk FDA-reglerad produktprodukt

Ja

Denna information hämtades direkt från webbplatsen clinicaltrials.gov utan några ändringar. Om du har några önskemål om att ändra, ta bort eller uppdatera dina studieuppgifter, vänligen kontakta register@clinicaltrials.gov. Så snart en ändring har implementerats på clinicaltrials.gov, kommer denna att uppdateras automatiskt även på vår webbplats .

Prenumerera