Nurse Practitioner Chronicles

  Syphilis Screening: Traditional vs. Reverse Algorithms, False Positives, and the SLE Connection Two tests, two algorithms, one disease that's surging back—and the autoimmune pitfall that keeps tripping everyone up. Syphilis is back. Rates in the US have been climbing steadily, congenital syphilis cases have skyrocketed, and the CDC has made this a public health priority. For NPs in primary care, prenatal care, and urgent care, understanding the screening algorithms isn't optional anymore—it's essential. And the fact that your lab may be using a different algorithm than the one you learned in school makes it even more critical to know what you're looking at. The Two Categories of Tests Before we get to algorithms, you need to understand the two fundamentally different types of syphilis tests: Nontreponemal Tests (RPR, VDRL) Detect antibodies to  cardiolipin-cholesterol-lecithin antigens  released from damaged host cells and from  T. pallidum  itself NOT specifi...

  The Antiphospholipid Antibody Panel: What Every NP Needs to Know (and the Pitfalls That'll Bite You) Unexplained clots, pregnancy losses, and a lab panel that's trickier than it looks. Antiphospholipid syndrome (APS) is one of those diagnoses that's simultaneously under-recognized and over-tested. In primary care, we see the patients who present with the red flags—unexplained DVT in a 30-year-old, recurrent pregnancy losses, a stroke in someone who "shouldn't" be having one. But the lab panel itself is full of pitfalls that can lead to misdiagnosis in both directions. Let's walk through this one together. What Is APS, in Plain English? APS is an autoimmune disorder where the body produces antibodies against phospholipid-binding proteins. Despite the name "antiphospholipid" (which sounds like it should cause bleeding), these antibodies paradoxically cause  clotting —both venous and arterial—plus pregnancy complications. APS can occur alone (prim...