Exsanguination: How to Avoid Bleeding Out — GMP #271

Published on February 21, 2025
Duration: 41:55

This discussion with Dr. Will Dabbs MD focuses on understanding exsanguination, the leading cause of death from gunshots and other severe injuries. It details the anatomy and physiology of blood loss, emphasizing that significant bleeding can occur internally with minimal external signs. The conversation covers practical techniques for hemorrhage control, prioritizing direct pressure and then discussing the application and types of tactical tourniquets, including improvised methods, as a critical intervention for life-threatening limb wounds.

Quick Summary

Exsanguination, or bleeding out, is the primary cause of death from gunshots. An adult has about 5 liters of blood; losing 40% (2 liters) is often lethal. The first step in managing severe limb bleeding is direct pressure. If ineffective, apply a tourniquet proximal to the wound, tightening until bleeding stops. Commercial (CAT, RATS) and improvised tourniquets are discussed, with a two-hour time limit recommended before risking limb loss.

Chapters

  1. 00:04Introduction to Exsanguination
  2. 00:43Guest Introduction: Dr. Will Dabbs MD
  3. 01:39The Dangers of Bleeding Out
  4. 04:43Anatomy and Physiology of Blood Loss
  5. 05:30Blood Volume and Lethality
  6. 06:51Circulatory System Overview
  7. 09:33Real-World Bleeding Scenarios
  8. 11:20Internal Bleeding Examples
  9. 14:00Urgent Care Bleeding Incident
  10. 19:46First Responder Training & Tourniquets
  11. 20:34Tourniquet Types: RATS vs. CAT
  12. 22:19Tourniquet Application Time Limits
  13. 23:08Choosing the Best Tourniquet
  14. 24:22Tourniquet Pressure and Tissue Damage
  15. 26:33SWAT Tourniquet and Improvisation
  16. 28:06Training and Gear Bias
  17. 30:01Maintaining Composure Under Pressure
  18. 32:15Medical Training and Desensitization
  19. 33:58Direct Pressure as First Step
  20. 34:53Coping Mechanisms in High-Stress Jobs
  21. 39:07Leaving Work at Work
  22. 40:09Podcast Housekeeping & Sponsors

Frequently Asked Questions

What is exsanguination and why is it a leading cause of death from gunshots?

Exsanguination is the medical term for bleeding out. It's the primary cause of death from gunshots because severe injuries can disrupt major blood vessels, leading to rapid and significant blood loss that the body cannot compensate for, resulting in hypovolemic shock.

How much blood loss is considered lethal for an adult?

An adult human typically has about 5 liters of blood. Losing approximately 20% (about 1 liter) can cause loss of consciousness. Losing around 40% (about 2 liters) is often lethal, leading to cardiac failure because the heart has insufficient volume to pump effectively.

What is the first step in managing severe bleeding from a limb wound?

The first and most critical step in managing severe bleeding from a limb wound is to apply firm, direct pressure using a clean cloth, gauze, or t-shirt. If direct pressure alone is insufficient to control life-threatening hemorrhage, a tourniquet may be considered.

What are the main types of tactical tourniquets discussed?

The discussion highlights two popular commercial tourniquets: the Combat Application Tourniquet (CAT), which uses a windlass, and the Rapid Access Tourniquet System (RATS), a bungee-like device. Improvised tourniquets using materials like bootlaces and sticks are also mentioned as viable options in emergencies.

What is the recommended time limit for tourniquet application?

The published time frame for tourniquet application before risking limb loss is approximately two hours. Prolonged application can lead to complications like compartment syndrome and the release of harmful inflammatory substances when blood flow is restored.

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