If chilled saline is available, what is the recommended volume for initial IV/IO administration in adult heat stroke?

If chilled saline is available, what is the recommended volume for initial IV/IO administration in adult heat stroke?

• A. Mist the patient with cold water and use fan or manual fan (Convection)
• B. Chilled Normal Saline (if available): 1L IV/IO
• C. Administer Oral Hydration
• D. Normal Saline: 0.5L IV/IO

Answer: (B)

The key idea is using internal cooling paired with rapid fluid replacement. In adult heat stroke, starting aggressive cooling and rehydration early is crucial, and chilled IV fluids help with both. Giving a liter of chilled normal saline via IV or IO begins to lower core temperature as the cold fluid circulates, while also addressing dehydration from heat exposure. This single, substantial initial bolus provides a rapid, practical way to kick off treatment while other cooling measures are implemented. External cooling methods (like misting with cold water and fans) help but don’t address fluid deficit directly. Oral hydration isn’t suitable when heat‑stroke patients may have altered consciousness or gag/swallowing difficulties. A smaller initial volume, such as 0.5 L, is less effective at jump-starting cooling and rehydration.

The key idea is using internal cooling paired with rapid fluid replacement. In adult heat stroke, starting aggressive cooling and rehydration early is crucial, and chilled IV fluids help with both. Giving a liter of chilled normal saline via IV or IO begins to lower core temperature as the cold fluid circulates, while also addressing dehydration from heat exposure. This single, substantial initial bolus provides a rapid, practical way to kick off treatment while other cooling measures are implemented.

External cooling methods (like misting with cold water and fans) help but don’t address fluid deficit directly. Oral hydration isn’t suitable when heat‑stroke patients may have altered consciousness or gag/swallowing difficulties. A smaller initial volume, such as 0.5 L, is less effective at jump-starting cooling and rehydration.