NR 507 Week 5 Discussion; Choose Your Own Pathophysiology Adventure Part 2 of 3 - Sickle Cell Disease

2021). In those regions, malaria has historically been one of the most devastating diseases a person could face. Carrying one copy of the sickle cell gene turns out to offer a degree of natural protection against it. So even though inheriting two copies causes serious disease, one copy kept people alive in environments where malaria was killing others. That survival advantage is why the mutation spread and held on across generations in those populations, and it is also why sickle cell disease continues to affect people from those backgrounds at much higher rates today (Kato et al., 2021). Signs and Symptoms (Manwani & Frenette, 2022) • Chronic fatigue and pallor due to persistent hemolytic anemia. • Episodic pain crises, which are the defining symptom of the disease, resulting from vascular occlusion inside bones, chest, abdomen, or joints. • Jaundice and yellowing of the eyes from destruction of red cells. • Hands and feet swelling, especially in infants. • Children grow slower and enter puberty later. • Frequent infections due to functional asplenia. • Shortness of breath and poor exercise tolerance. Complications. • Acute chest syndrome: vaso-occlusion in the pulmonary vasculature resulting in chest pain, fever, and respiratory distress; a common cause of death. • Stroke: when sickled cells build up in cerebral vessels, in particular children are susceptible. become serious and potentially life threatening in someone with sickle cell disease (Pecker & Lanzkron, 2021). How the condition is diagnosed, what are any relevant assessment findings, labs and imaging studies? Sickle cell disease is most often caught at birth through newborn screening, but the diagnosis can be confirmed at any age using hemoglobin electrophoresis, which remains the gold standard test by identifying HbS and confirming that normal HbA is absent (Pecker & Lanzkron, 2021). The lab findings tell a consistent story: chronic normocytic anemia, elevated reticulocytes showing the bone marrow working hard to keep up, high bilirubin and LDH from ongoing red cell breakdown, haptoglobin that is completely undetectable, and sickled cells visible on a peripheral smear. A metabolic panel, liver function tests, and urinalysis round out the baseline picture by giving a snapshot of how other organ systems are holding up (Kato et al., 2021). On physical exam, the earliest signs tend to be pallor, jaundice, scleral icterus, dactylitis in infants, and splenomegaly in young children. When neurological deficits, leg ulcers, or flow murmurs show up, they point toward disease that has been active and progressing for a longer period of time (Manwani & Frenette, 2022). Imaging serves a purpose beyond just confirming what is already suspected. It functions as an ongoing surveillance tool across the lifespan. Transcranial Doppler is used routinely in children to catch elevated cerebral blood flow velocity before a stroke actually happens. MRI picks up silent cerebral infarcts that would never surface on their own. Echocardiogram screens for pulmonary hypertension, bone and joint imaging identifies avascular necrosis before it becomes severely disabling, and abdominal ultrasound keeps tabs on the spleen and screens for pigment gallstones that