New Fabric Attenuation Device in Endovascular Interventional Radiology (PREFER) (PREFER)

Prospective Randomized Evaluation of a New Fabric Attenuation Device in Endovascular Interventional Radiology (PREFER)

The PREFER Trial primary objective of the trial is to show how much radiation attenuation is provided by XPF in absolute and relative terms.

Study Overview

• Status: Completed
• Conditions: Exposure

Detailed Description

The PREFER Trial has three main objectives. The primary objective of the trial is to show how much radiation attenuation is provided by XPF in absolute and relative terms. The secondary objective of the study is to measure and compare the amount of radiation that interventional radiologists are exposed to per case in an interventional suite setting using FDA approved XPF thyroid collars or standard 0.5 mm Pb equivalent thyroid collars. The third objective is to assess the operator comfort wearing the XPF protection devices. In order to achieve these objectives, measurements will be performed in 60 consecutive endovascular procedures requiring C-arm fluoroscopy performed at BCVI. Participants will be asked to wear an XPF cap (weighing approximately 100 grams) in every study procedure. Furthermore, a prospective randomization will be performed, assigning participants to wear their own standard 0.5 mm Pb equivalent thyroid collar or to wear the FDA approved XPF thyroid collar. Radiation exposure will be monitored with 4 radiation detectors (TLDs, 2 attached to the cap, 2 attached to the collar) which the participant is required to wear. After each procedure the participant will be asked to rate the comfort of wearing the devices on a scale from 1 to 100.

• Study Type: Observational
• Enrollment (Actual): 60

Contacts and Locations

Study Locations

• United States
  • Florida
    • Miami, Florida, United States, 33176
      • Baptist Hospital of Miami, Miami Cardiac and Vascular Institute

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 18 years and older (Adult, Older Adult)
• Accepts Healthy Volunteers: Yes
• Genders Eligible for Study: All

• Sampling Method: Non-Probability Sample

Study Population

All operators are Interventional Radiologists and Co-Investigators. Prior to start of the study, all operators are asked to provide written informed consent to participate in the study.

Description

Inclusion Criteria:

• Interventional Radiologists practicing in Baptist Cardiac & Vascular Institute
• consecutive endovascular procedure requiring C-arm fluoroscopy

Exclusion Criteria:

• Interventional Neuroradiologists and Interventional Cardiologists will not be included in this study.

Study Plan

How is the study designed?

Number of groups / cohorts

1

Cohorts and Interventions

Group / Cohort
Interventional Radiologists; All operators are Interventional Radiologists and co-investigators. Prior to start of the study, all operators are asked to provide written informed consent to participate in the study.

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Radiation attenuation in percentage (%) and in absolute terms (μSv/min)	The null hypothesis is that the XPF thyroid collar is inferior to the standard 0.5mm Pb lead equivalent thyroid collar with regard to radiation attenuation/transmission. The alternative hypothesis is that the XPF thyroid collar is non-inferior to the standard thyroid collar. If there is truly no difference between standard and XPF thyroid collars, then 60 patients are required to be 95% sure that the lower limit of a one-sided 95% confidence interval (or equivalently a 90% two-sided confidence interval) will be above the non-inferiority limit of -0.7% transmission rate and -0.013 μSv/min.	The attenuation is assessed directly after each procedure (day 1)

Secondary Outcome Measures

Outcome Measure	Time Frame
Wearing comfort of the XPF cap and collar on a scale from 0-100.	(day 1) Operators are asked directly after each procedure to rate the wearing comfort

Collaborators and Investigators

• Sponsor: Baptist Health South Florida
• Investigators: Principal Investigator: Barry T. Katzen, MD, Baptist Hospital of Miami and its Miami Cardiac and Vascular Institute; Principal Investigator: Heiko Uthoff, MD, Baptist Hospital of Miami and its Miami Cardiac and Vascular Institute

Study record dates

Study Major Dates

• Study Start: September 1, 2011
• Primary Completion (Actual): November 1, 2011
• Study Completion (Actual): December 1, 2011

Study Registration Dates

• First Submitted: September 28, 2011
• First Submitted That Met QC Criteria: October 12, 2011
• First Posted (Estimate): October 13, 2011

Study Record Updates

• Last Update Posted (Estimate): September 25, 2014
• Last Update Submitted That Met QC Criteria: September 23, 2014
• Last Verified: September 1, 2014

More Information

Terms related to this study

• Keywords: Radiation protection; Operator Comfort Assessment; Measurement of Radiation Exposure; Endovascular Interventional Radiology
• Other Study ID Numbers: 11-052