Central and regional hemodynamics during uncontrolled bleeding using hypertonic saline dextran for resuscitation

Area of Science:

• Trauma Surgery
• Resuscitation Medicine
• Surgical Hemodynamics

Background:

• Uncontrolled intra-abdominal bleeding poses significant challenges in trauma care.
• Hypertonic saline/dextran (HSD) is a fluid resuscitation agent with potential benefits in hemorrhagic shock.
• The impact of HSD on rebleeding following vascular injury requires further investigation.

Purpose of the Study:

• To evaluate the effects of HSD on central and regional hemodynamics during uncontrolled intra-abdominal bleeding.
• To assess the incidence and extent of rebleeding after HSD administration in a porcine model.

Main Methods:

• 16 anesthetized pigs underwent induced aortic injury to simulate intra-abdominal bleeding.
• Ultrasonic flow probes monitored blood flow in the aorta and major vascular regions.
• HSD was administered at two different doses (4 mL/kg and 2.65 mL/kg) 10 minutes post-injury.

Main Results:

• Initial bleeding significantly reduced blood flow and cardiac output.
• HSD administration led to a prompt increase in blood flow but triggered rebleeding in 81% of subjects within 2 minutes.
• Rebleeding averaged 62% of initial blood loss; HSD did not improve oxygen consumption or survival rates.

Conclusions:

• HSD, even at reduced doses, promotes rebleeding following low-energy intra-abdominal aortic injury.
• HSD demonstrated no beneficial effect on uncontrolled hemorrhage in this experimental model.
• Further research is needed to determine optimal resuscitation strategies for severe intra-abdominal bleeding.