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Casualties Unknown Internal Bleeding Guide: Relieving Chest Pressure, Saline Infusions, and Recovery

Diagnose hidden thoracic trauma, relieve pleural cavity pressure with chest drains, restore blood volume using IV saline, and bandage wounds before sleeping to survive in Casualties: Unknown.
Diagnose hidden thoracic trauma, relieve pleural cavity pressure with chest drains, restore blood volume using IV saline, and bandage wounds before sleeping to survive in Casualties: Unknown.

Internal hemorrhaging in Casualties: Unknown is among the most lethal medical crises an explorer can face. Unlike surface cuts, hidden thoracic hemorrhages elevate pressure within chest cavities, forcing the heart into erratic flutter and collapsing pulmonary chambers. Mastering chest decompression, fabricating IV fluid kits, and dressing external bleeds are vital survival skills for surviving trauma.

Recognizing Internal Trauma and Thoracic Hemorrhage

Severe blunt trauma against the ribcage often inflicts internal hemorrhage that remains invisible on external limbs — predator attacks detailed in our enemies guide can trigger sudden thoracic damage. Blood collects within the pleural cavity surrounding the lungs, steadily escalating internal pressure. This thoracic accumulation destabilizes heart rhythms and causes pulmonary collapse if ignored. Watching for sudden irregular heartbeats after blunt impacts alerts players to dangerous internal bleeding before cardiac failure occurs.

Health panel showing bleeding teardrop status icons over damaged limbs
Health panel showing bleeding teardrop status icons over damaged limbs

Decompressing Pleural Cavities With Chest Drains

A chest drain inserted into the pressurized cavity vents pooled fluids and immediately reduces intrathoracic tension. Players can acquire chest drains by trading with underground merchants. Applying a drain releases pressurized fluids, allowing collapsed lungs to re-expand and stabilizing erratic heart palpitations.

Health screen showing IV bag saline and blood injection options
Health screen showing IV bag saline and blood injection options

Crafting IV Bags for Saline and Blood Infusions

Extensive hemorrhaging severely reduces blood volume, threatening character survival. Crafting an IV bag using flexible plastic harvested from drop pods and scrap tubing provides a lightweight medical container. Players can administer saline or transfuse collected blood through the health interface. While saline infusions cannot fully replace red blood cells, they restore critical vascular pressure to stave off circulatory collapse.

Wound treatment screen displaying dressings applied across body parts
Wound treatment screen displaying dressings applied across body parts

Bandaging External Bleeds and Sleeping Safely

Before attempting to sleep off internal injuries — our food and sleep guide covers campfire rest and skin shield health — players must secure all external lacerations. Teardrop icons on limbs indicate active blood loss, which rapidly drains surviving reserves during rest cycles. Applying torn or full fabric dressings — the injuries and medical guide explains crafting canvas wraps — seals open lacerations. Once active bleeding stops and blood pressure stabilizes, resting allows the body to steadily regenerate tissue and recover from internal trauma.

Sources

Sources & References: Official developer updates and community gameplay (Primary Source).