Are you a nurse thinking about pursuing your critical care certification? Check out our CCRN Review Course and QBank for more concepts like this one - try it FREE for a limited time at https://nurses.archerreview.com/ccrn ! Ever wonder why SpO₂ isn't the full story? Let's break down the oxyhemoglobin dissociation curve - how your body loads and unloads oxygen and why it really matters at the bedside. ⬅️ Left shift = holds on tight ("L" for love!) ➡️ Right shift = releases - lets it go ("R" for r