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Clinical Trial Summary

Tumors with low oxygen levels are associated with poor prognosis and resistance to standard radiotherapy or systemic therapies. The ability to make repeated oxygen measurements in tumors could be used to help select the most effective treatment or the best timing to start therapies. The purpose of this study is to ascertain the safety and feasibility of using an implantable oxygen sensor, known as the OxyChip, to make oxygen measurements in tumors using EPR oximetry, a technique related to magnetic resonance imaging (MRI).


Clinical Trial Description

This is an early feasibility Phase I clinical trial for safety. The total enrollment for this study is 60 patients (30 per phase). The study is split in a phase IA (short duration of implantation with no other cancer therapy planned prior to excision) and a phase IB (duration of implantation for up to 52 weeks while receiving neoadjuvant radiation therapy or systemic therapy prior to surgical excision), as described below. The initial 6 patients will have the OxyChip placed for a short duration (up to 4 weeks) after which the OxyChip will be removed when the tumor mass is resected, prior to delivery of any further therapies. After the successful implantation, removal, and evaluation of the OxyChip in the first 6 Phase IA patients, enrollment will be opened to an additional 24 Phase IA patients and to 6 Phase IB patients who will either receive neoadjuvant radiotherapy or systemic therapy (chemotherapy, biologic therapy, or endocrine therapy) while the OxyChip is in place. After the successful implantation, removal, and evaluation of the OxyChip in the first 3 Phase IB patients receiving radiation therapy or systemic therapy, enrollment will be opened to an additional 24 Phase IB patients. Up to five oxygen measurements per week will be made during the course of radiation or systemic therapy. The OxyChips will be removed at surgery. Patients receiving radiation or systemic therapy will be evaluated at least weekly for assessment with respect to any adverse events for the primary objective and oximetry measurements will be taken periodically at least one day after implantation and up to its removal at the planned tumor excision to assess the secondary objective. Following resection, the tissue surrounding the OxyChip will be examined for any adverse events for the primary objective. For the exploratory objectives, the tissue will also be examined for biomarkers associated with hypoxia or growth. ;


Study Design


Related Conditions & MeSH terms


NCT number NCT02706197
Study type Interventional
Source Dartmouth-Hitchcock Medical Center
Contact
Status Terminated
Phase N/A
Start date December 31, 2015
Completion date June 30, 2022

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