NCT04138615

Analgesics in the Pre-hospital Setting: Implications on Hemorrhage Tolerance - Morphine

• Status: Completed
• Phase: Phase 1 / Phase 2
• Study type: Interventional
• Enrollment: 44 (actual)
• Sponsor: University of Texas Southwestern Medical Center · Academic / Other
• Sex: All
• Age: 18 Years – 45 Years
• Healthy volunteers: Accepted

Summary

We are examining how morphine (a commonly used pain medication) will alter responses to simulated blood loss in humans. To simulate blood loss in our research laboratory, participants will complete a test with their lower body in a custom-designed vacuum chamber for a brief period of time.

Detailed description

Pain management on the battlefield is critical for the wellbeing of the soldier. Given that a hemorrhagic injury on the battlefield is virtually always associated with pain, it is paramount that the selected pain medication does not disrupt appropriate physiological mechanisms that are beneficial towards the maintenance of blood pressure and vital organ blood flow during that hemorrhagic insult. Current guidelines for the selection of pain medications of a hemorrhaging soldier are based upon limited scientific evidence, with the vast majority of supporting studies being conducted on anesthetized animals. Thus, the interaction between hemorrhagic shock and pain medications commonly employed on the battlefield is yet to be determined in the conscious humans. With this background, we will test the hypothesis that morphine will impair the capacity for a conscious human to tolerate a hemorrhagic insult. The obtained data will provide the necessary scientific evidence in humans to support the Committee on Tactical Combat Casualty Care (CoTCCC) guidelines on the analgesic of choice for moderate to severe injuries where the casualty is in hemorrhagic shock. Notably, such data will identify the analgesic that least compromises a human's ability to tolerate a hemorrhagic insult, ultimately providing critical information to the combat medic on which analgesic should be employed for such an injury.

Conditions

• Healthy

Interventions

Type	Name	Description
DRUG	Morphine	Subjects will receive Morphine while the effects of this drug on tolerance to a hemorrhagic insult will be assessed.
OTHER	Placebo	Subjects will receive saline while the effects of this drug on tolerance to a hemorrhagic insult will be assessed.

Timeline

• Start date: 2019-11-12
• Primary completion: 2022-01-04
• Completion: 2022-01-04
• First posted: 2019-10-24
• Last updated: 2023-01-12
• Results posted: 2023-01-12

Locations

1 site across 1 country: United States

Regulatory

• FDA-regulated drug study