NURS 215 Week 3 Discussion Board Forum 2 Example

Discussion Board Forum 2: The Inflammatory Response Gone Wrong

NURS 215 Post-licensure Pathophysiology, Discussion Board Forum 2

Thread by [Student Name]

The patient and classmates are composites; the textbook and the sources cited are real.

At the start of a night shift, I took report on a woman in her seventies who had come in the day before with a bladder infection; she was alert and chatting. By 3 a.m., she was confused, her skin was warm and flushed, her heart rate was 124 and her blood pressure had fallen to 84/46. Her lactate came back at 4.1 mmol/L. She was in septic shock. What changed in those six hours is a lesson in this week's chapters on inflammation and immunity.

Under the 2016 consensus, sepsis means organs failing because the body's reaction to an infection has run out of control, and septic shock is the subset in which, even after adequate fluid, vasopressors are needed to hold the mean pressure at 65 or above and lactate stays over 2 mmol/L (Singer et al., 2016). The definition moved away from inflammation alone because inflammation is the normal, protective response; the danger begins when the response becomes dysregulated and damages the body's own organs.

Grossman and Porth (2014) describe how inflammatory mediators, released to fight infection, dilate blood vessels and increase capillary permeability so that white cells and plasma proteins can reach the infected tissue. In a local infection, that is useful. In sepsis, the same mediators act throughout the body. Widespread vasodilation lowers systemic vascular resistance, which is why my patient's skin was warm and her pressure fell. Capillary leak moves fluid out of the vessels and into the tissues, so the circulating volume falls even though no blood has been lost. Microvascular clotting and endothelial damage disrupt flow at the capillary level, and cells that do receive oxygen may not use it well. Tissues shift to anaerobic metabolism, and lactate rises. The brain, kidneys and lungs show the failure first, which explains her confusion and, later that night, her falling urine output.

For nursing, the mechanism tells me what to watch. A rising respiratory rate, new confusion, a falling pressure or low urine output are not separate problems; they are signs of the same failing perfusion. In sepsis, the body's defense does the damage, and the nurse's job is to notice the moment it stops protecting and starts harming.

Reply to Jessica

Jessica, you mentioned that your unit screens with qSOFA, which scores fast breathing, a change in mental status and a low systolic pressure. The consensus group (Singer et al., 2016) introduced qSOFA to identify patients outside the ICU at risk of poor outcomes, but Evans et al. (2021), in the Surviving Sepsis Campaign guidelines, recommend against using qSOFA alone as a single screening tool, compared with SIRS, NEWS or MEWS, because it can miss patients early in sepsis. My patient would not have met qSOFA until her confusion began, hours after her heart rate and temperature had changed. It might be worth asking your educator whether your screening tool combines several measures. Does your unit use an early warning score in the electronic record?

Reply to Derek

Derek, you asked why the guidelines call for fluids before vasopressors. The mechanism answers it: in sepsis, much of the low blood pressure comes from fluid leaking out of the vessels and from vasodilation, so the tank is both larger and emptier. The 2021 guidelines suggest giving a crystalloid bolus of at least 30 mL for each kilogram of body weight during the opening three hours when sepsis has caused hypoperfusion or shock (Evans et al., 2021), and starting norepinephrine as the first-line vasopressor when pressure stays low. Grossman and Porth (2014) explain that vasoconstrictors squeezing an underfilled circulation can worsen perfusion to the gut and kidneys, which is why volume is restored first. Nurses then watch for signs of fluid overload, such as crackles, because the same leaky capillaries can let fluid into the lungs. Has your unit started using ultrasound to guide fluids?

References

Evans, L., Rhodes, A., Alhazzani, W., Antonelli, M., Coopersmith, C. M., French, C., Machado, F. R., Mcintyre, L., Ostermann, M., Prescott, H. C., Schorr, C., Simpson, S., Wiersinga, W. J., Alshamsi, F., Angus, D. C., Arabi, Y., Azevedo, L., Beale, R., Beilman, G., . . . Levy, M. (2021). Surviving Sepsis Campaign: International guidelines for management of sepsis and septic shock 2021. Critical Care Medicine, 49(11), e1063-e1143. https://doi.org/10.1097/CCM.0000000000005337

Grossman, S. C., & Porth, C. M. (2014). Porth's pathophysiology: Concepts of altered health states (9th ed.). Wolters Kluwer Health/Lippincott Williams & Wilkins.

Singer, M., Deutschman, C. S., Seymour, C. W., Shankar-Hari, M., Annane, D., Bauer, M., Bellomo, R., Bernard, G. R., Chiche, J. D., Coopersmith, C. M., Hotchkiss, R. S., Levy, M. M., Marshall, J. C., Martin, G. S., Opal, S. M., Rubenfeld, G. D., van der Poll, T., Vincent, J. L., & Angus, D. C. (2016). The third international consensus definitions for sepsis and septic shock (Sepsis-3). JAMA, 315(8), 801-810. https://doi.org/10.1001/jama.2016.0287