A biopsy needle surrounded by a peel away sheath chemically impregnated with a blood detection composition enabling a user (e.g., a surgeon) to accurately and timely determine the existence of a blood pooling or hematoma when passing an implantable (e.g., deep brain stimulation probes) or non-implantable (e.g., biopsy needle) device into a region of the subject's body (e.g., a brain) to gather tissue for further analysis. A biopsy needle may be provided wherein the needle is tightly surrounded by a peel-away sheath that is chemically impregnated with a blood detection composition. The surgeon may insert the biopsy needle into the subject and peel away the chemically impregnated sheath in order to assess whether or not a blood pooling or hematoma exists, and act immediately to address the blood pooling or hematoma.