Hemocue America Hemocue Hemoccult® Sensa® Single Slide (Test Cards). Detects abnormal occult bleeding associated with gastrointestinal disorders more reliably than standard fecal occult blood tests (FOBTs). Includes an enhancer which makes the test more sensitive and more readable than standard Hemoccult® and other FOBTs. With enhanced blood detection and improved readability, the use results in significantly improved detection of adenomas and colorectal cancer. CLIA Waived.