Haemorrhage is the escape of blood from the vascular system due to vessel damage. It can occur following trauma, surgical procedures, or underlying medical pathologies such as clotting disorders or ruptured aneurysms. The severity of a haemorrhage depends heavily on the volume of blood lost, the rate of the bleeding, and the specific site of the vascular injury. Rapid loss of even a small percentage of total blood volume can trigger circulatory collapse, whereas a slower bleed over a longer duration allows physiological compensatory mechanisms to adjust, masking early signs of clinical deterioration.
Hypovolemic shock develops when the circulating blood volume drops below the level required to adequately perfuse vital organs.
A systematic nursing assessment is vital for detecting early deterioration in patients at risk for haemorrhage. Tachycardia is often the earliest vital sign abnormality, appearing before a drop in systemic blood pressure manifests. Nurses must monitor for subtle behavioral shifts such as restlessness, confusion, or anxiety, which indicate cerebral hypoperfusion. Skin changes, delayed capillary refill, and decreasing urine output below 0.5 mL/kg/h serve as reliable indicators of failing peripheral and renal perfusion.
Immediate control of external bleeding prevents rapid exsanguination. Direct pressure applied firmly over the wound using a clean dressing remains the primary intervention. If bleeding persists through the first dressing, additional layers are applied without removing the original pad to avoid disrupting fragile clot formation. When direct pressure fails on a limb, a tourniquet is placed proximal to the bleeding site. Hemostatic dressings containing specialized clotting agents can also be packed directly into deep junctional wounds where tourniquets cannot be applied.
Internal bleeding occurs within closed body cavities such as the abdomen, thorax, or retroperitoneal space. Common signs include abdominal rigidity, distension, bruising over the flanks, and absent bowel sounds. Patients may cough up bright red blood from the lungs or pass black, tarry stools from the gastrointestinal tract. Management requires rapid surgical intervention or interventional radiology to stop the source of bleeding, alongside aggressive resuscitation to stabilize hemodynamics.
Managing a bleeding patient requires coordinated nursing actions to restore tissue perfusion. Nurses must secure large-bore peripheral intravenous lines to facilitate rapid fluid administration. Isotonic crystalloids are infused initially, but modern protocols emphasize early administration of blood products to prevent the lethal triad of hypothermia, acidosis, and coagulopathy. Continuous monitoring of vital signs, oxygen saturation, and urine output helps evaluate the effectiveness of the resuscitation strategy.
Uncontrolled blood loss frequently leads to cascade complications that threaten patient survival. The lethal triad of trauma—hypothermia, metabolic acidosis, and coagulopathy—creates a destructive feedback loop where clotting fails entirely. Cold intravenous fluids and exposure lower body temperature, which impairs enzyme reactions required for clot formation. Tissue hypoperfusion generates lactic acid, lowering blood pH and further inhibiting coagulation enzymes, ultimately driving the patient toward multi-organ failure.