Pilot Study of an Implantable Microdevice for In Situ Evaluation of Drug Response in Patients With Colorectal Liver Metastasis

"Patients with diagnosed liver metastasis from a colorectal primary deemed resectable. The study intervention will be limited to the percutaneous placement of up to 2 IMDs per lesion with a maximum of 4 devices total, with the subsequent en bloc resection of the tumor plus IMD within 3 (+2) days after placement. The microdevices will remain in the tumor for a minimum of a 2-day incubation period, although ideally for 3 days.~The IMD is a small cylindrical device approximately 750 um in diameter and 5 mm in length (Figure 2), housing up to 21 reservoirs. It is made of PEEK, biocompatible material used in other implantable constructs, including joint replacements. 11-13 Drugs are solubilized with poly-ethylene glycol (PEG) and loaded into the individual reservoirs. The drug diffusion has been mapped extensively to ensure that the weight of PEG is selected such that drug diffusion is limited and will not mix or interfere with another drug."