Which of the following is NOT a typical sample type used in POCT?

In the context of Point-of-Care Testing (POCT), the typical sample types include blood, urine, and saliva, as these materials are easily accessible and provide rapid results for a variety of tests. Blood is commonly used for a wide range of tests, including glucose monitoring, infectious disease testing, and electrolyte levels. Urine is also a prevalent sample type for tests such as drug screening and kidney function assessments. Saliva is becoming increasingly popular for hormone level testing and drug screening because it is non-invasive and easy to collect.

Bone marrow, however, is not a standard sample used in POCT. The collection of bone marrow is an invasive procedure that requires specialized skills and equipment, typically conducted in a clinical setting rather than at the point of care. This makes it less practical for rapid testing scenarios that POCT aims to provide, where quick and simple sample collection is crucial for timely patient care. Therefore, bone marrow is the correct answer as it does not align with the typical sample types utilized in POCT.