Lactated Ringer's differs from normal saline in composition and usage. Which statement is accurate?

• A. LR contains lactate, potassium, and calcium; NS contains sodium chloride only; Use LR for general crystalloids when not contraindicated; avoid LR with hypercalcemia or when calcium-containing meds are given in the same line.
• B. LR contains lactate, but NS contains calcium.
• C. NS contains lactate.
• D. LR is only for pediatric use.

Answer: (A)

Lactated Ringer's is a balanced crystalloid that includes lactate, potassium, and calcium, whereas normal saline is just sodium chloride. This matters because the lactate in LR can be converted by the body into bicarbonate, giving a mild alkali load that can help with acidosis, and the extra electrolytes (potassium and calcium) make LR useful for general fluid replacement when there are no contraindications. The calcium content means LR should be avoided if the patient has hypercalcemia or if calcium-containing meds are being given through the same IV line, to prevent interactions or precipitation. Normal saline, by contrast, lacks lactate and calcium, containing only sodium chloride, which is why it does not provide the same alkali/electrolyte benefits and can contribute to chloride-heavy acidosis with large volumes. So the statement accurately captures the composition and appropriate use: LR has lactate, potassium, and calcium; NS has sodium chloride only; use LR when not contraindicated, and avoid it if calcium in the line or hypercalcemia is a concern.