Measurement of Hemodynamic Responses to Lower Body Negative Pressure

NCT ID: NCT03582501

Last Updated: 2019-06-12

Basic Information

• Recruitment Status: COMPLETED
• Clinical Phase: NA
• Total Enrollment: 24 participants
• Study Classification: INTERVENTIONAL
• Study Start Date: 2019-01-08
• Study Completion Date: 2019-05-23

Brief Summary

This study will be collecting data on participants undergoing lower body negative pressure (LBNP) to simulate progressive blood loss. The goal of the study is to collect data to allow for development of an algorithm with machine learning to predict blood pressure responses to hypovolemia by analyzing the arterial waveforms collected during LBNP.

Detailed Description

Death from exsanguination continues to be a major problem in combat casualty care and the care of civilians subjected to trauma. The ability to detect significant blood loss using traditional vital signs (heart rate, blood pressure) is marginal due to a variety of compensatory mechanisms that maintain blood pressure in the face of marked reductions in circulating blood volume. Along these lines, it is critical to develop monitoring devices and algorithms to non-invasively assess central blood volume in humans for the purposes of facilitating more timely interventions. The standard way to simulate hemorrhage in humans is to use Lower Body Negative Pressure (LBNP). In this technique, the lower body of a supine volunteer is enclosed in an airtight container while suction is applied to cause venous pooling in the legs and reduce central blood volume. This technique generates many physiological adaptations that are similar to that observed during blood loss studies in animals and human volunteers. Thus, the purpose of this study is to obtain data for use in developing monitoring technology to detect hemorrhage and other surrogate markers of central blood volume in humans.

Conditions

Hypotension and Shock

Study Design

• Allocation Method: NA
• Intervention Model: SINGLE_GROUP
• Primary Study Purpose: BASIC_SCIENCE
• Blinding Strategy: NONE

Study Groups

Healthy volunteers

All volunteers will be studied at rest and during experimental condition (lower body negative pressure)

Group Type: EXPERIMENTAL

Lower body negative pressure

Intervention Type: OTHER

Simulated hypovolemia by applied suction to lower extremities to cause venous pooling.

Interventions

Lower body negative pressure

Simulated hypovolemia by applied suction to lower extremities to cause venous pooling.

Intervention Type: OTHER

Eligibility Criteria

Inclusion Criteria

18-55 year of age Non-smoker No history of hypertension No history of diabetes No history of coronary artery disease No history of neurologic disease

• Minimum Eligible Age: 18 Years
• Maximum Eligible Age: 55 Years
• Eligible Sex: ALL
• Accepts Healthy Volunteers: Yes

Sponsors

Mayo Clinic

OTHER

Sponsor Role: lead

Responsible Party

Timothy B. Curry

Vice Chair, Dept of Anesthesiology and Perioperative Medicine, Primary Investigator

Responsibility Role: PRINCIPAL_INVESTIGATOR

Principal Investigators

Timothy B Curry

Role: PRINCIPAL_INVESTIGATOR

Mayo Clinic

Locations

Mayo Clinic in Arizona

Scottsdale, Arizona, United States

Mayo Clinic in Florida

Jacksonville, Florida, United States

Mayo Clinic in Rochester

Rochester, Minnesota, United States

Countries

United States

Other Identifiers

18-002695

Identifier Type: -

Identifier Source: org_study_id