Episode Details

1. Testosterone for the Management of Traumatic Hemorrhage: A Systematic Review (Paul)

• The review followed PRISMA and was registered in PROSPERO. It asked whether giving testosterone during acute traumatic hemorrhage improves outcomes.
• It found 215 studies, and none met the inclusion criteria, so there is no human evidence yet.
• Animal and lab data showed no clear clotting benefit. Some showed more inflammation, and estrogen looked possibly more protective.
• The hosts called it hypothesis-generating rather than practice-changing. They suggested a more useful question is how casualties already on testosterone respond.
• A limitation is that the review only included English-language studies.

2. Over-Penetration Risk of TASER 10 Conducted Electrical Weapon Darts in Humans (Sydney)

• The TASER 10 fires single darts from a 10-cartridge magazine at about 205 ft/s, up from about 175 ft/s in older models.
• In 20 volunteers (40 dart impacts), none over-penetrated, even at 273 ft/s. Testing stopped when the darts themselves began to fail.
• The faster darts still carry more energy, so sensitive areas like the eyes remain a risk.
• Limitations were a small sample, bare-skin testing only, and manufacturer funding.

3. Clinical and Operational Considerations of IV and IO Access in High-Acuity Environments (Matt)

• Shock, vasoconstriction, hypothermia and venous collapse make IV access hard in combat. Even in civilian settings, 24–35% of adults meet criteria for difficult IV access.
• TCCC favors IO access when IV fails, but IO is not automatically equivalent to IV for drug delivery. The adenosine example illustrates this.
• Ultrasound-guided IV access helps but is bulky in the field. The authors frame access as a decision that depends on context.
• All three hosts said they would prioritize IO proficiency for every medic. IO works well for whole blood and a TXA flush, while analgesics often work better IV.