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The MAR Method Versus the Visual Estimation Method in Predicting External Blood Loss

NCT06855472 · Status: COMPLETED · Phase: NA · Type: INTERVENTIONAL · Enrollment: 237

Last updated 2025-03-06

No results posted yet for this study

Summary

The goal of this educational clinical trial is to determine whether the MAR method is more effective than the Visual Estimation method for estimating blood loss. It also aims to assess whether factors such as gender, weight, and height influence blood loss estimates when using the MAR method.

The main research questions it aims to answer are:

* Does the MAR method provide more accurate blood loss estimates than the Visual Estimation method on flat, non-absorbent surfaces?
* Does the MAR method take longer to estimate blood loss compared to the Visual Estimation method?
* Do demographic factors such as gender, height, and weight affect blood loss estimates using the MAR method?
* Do these demographic factors also influence the time required for estimation using the MAR method? Researchers will compare the MAR method with the Visual Estimation method to determine whether the MAR method is a useful tool for accurately estimating external blood loss in clinical skill training.

Participants will:

* Sign an Informed Consent Form at the start of the study
* Receive a 10-minute orientation session
* Receive a 2-minute MAR method training (for the intervention group-)
* Use either the MAR method or the Visual Estimation method for up to 60 seconds at each of the three stations
* Receive a 2-minute MAR method training (for the control group)
* Use the MAR method for up to 60 seconds at each of the three stations (for the control group)

Conditions

  • Blood Loss

Interventions

OTHER

The MAR method

The study was conducted in three isolated stations. Two faculty researchers designed the scenarios, while three others supervised training. Medical student investigators recorded blood loss estimates and estimation times. Before the study, investigators received 20-minute training. Participants and investigators were blinded to actual blood volumes. Group 1 and Group 2 attended a 10-minute briefing, including consent and study introduction. The study had two phases. In Phase 1, Group 1 used the Visual Estimation (VE) method, while Group 2 received a 2-minute MAR method training before making estimations. In Phase 2, Group 1 was trained in the MAR method and repeated estimations.A data form recorded demographics, blood loss estimates, and estimation times. Group 1's VE data and Group 2's MAR data were compared between groups, while Group 1's VE and MAR data were analyzed within the group. Combined MAR data from both groups were used to assess the impact of gender, height, and weight.

Sponsors & Collaborators

  • Baskent University

    collaborator OTHER

  • Betül Akbuğa Özel

    lead OTHER

Principal Investigators

  • Betul Akbuga Ozel, Asst.Prof. · Ankara Yıldırım Beyazıt University, Faculty of Medicine, Ankara Bilkent City Hospital, Department of Emergency Medicine

Study Design

Allocation
RANDOMIZED
Purpose
OTHER
Masking
DOUBLE
Model
PARALLEL

Eligibility

Sex
ALL
Healthy Volunteers
Yes

Timeline & Regulatory

Start
2017-05-07
Primary Completion
2017-05-07
Completion
2017-05-10

Countries

  • Turkey (Türkiye)

Study Locations

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Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT06855472 on ClinicalTrials.gov