Trial Outcomes & Findings for Compare Technegas Ventilation-Perfusion SPECT and Xenon Ventilation-Perfusion Planar Imaging for Pulmonary Embolism (NCT NCT01458639)
NCT ID: NCT01458639
Last Updated: 2015-11-10
Results Overview
Compared to the sensitivity of Xenon V/Q Planar imaging. "Truth" based on blinded reader's assessments of V/Q SPECT images compared with subject's final diagnosis resulting from clinical information at 30 days follow-up.
TERMINATED
PHASE3
18 participants
Prospective, 30 days follow-up
2015-11-10
Participant Flow
The recruitment period was November 14, 2012 to June 11, 2014. Subjects were recruited from US medical centers that performed Xenon-133 ventilation scans to evaluate patients for pulmonary embolism (PE).
Subjects suspected of PE to have Xe-133 ventilation/Tc-99m macroaggregated albumin (MAA) perfusion (VQ) scan. Must have at least one within 72 hours before imaging: D-dimer, Doppler ultrasound for deep vein thrombosis (DVT) or computed tomography angiography (CTA) for PE. Not have therapeutic dose blood thinner for \> than 72 hrs prior to imaging.
Participant milestones
| Measure |
Overall Study
Xenon-133 Ventilation Planar imaging, followed by Technegas Ventilation SPECT imaging with Technetium-99m (Tc-99m) labeled carbon particles, followed by Technetium 99m (Tc-99m) MAA Perfusion imaging for the diagnosis of pulmonary embolism. Xe-133 V / Tc-99m MAA Q results compared to Technegas V / Tc-99m MAA Q results.
|
|---|---|
|
Overall Study
STARTED
|
18
|
|
Overall Study
COMPLETED
|
12
|
|
Overall Study
NOT COMPLETED
|
6
|
Reasons for withdrawal
| Measure |
Overall Study
Xenon-133 Ventilation Planar imaging, followed by Technegas Ventilation SPECT imaging with Technetium-99m (Tc-99m) labeled carbon particles, followed by Technetium 99m (Tc-99m) MAA Perfusion imaging for the diagnosis of pulmonary embolism. Xe-133 V / Tc-99m MAA Q results compared to Technegas V / Tc-99m MAA Q results.
|
|---|---|
|
Overall Study
Physician Decision
|
4
|
|
Overall Study
Equipment issue
|
1
|
|
Overall Study
Inability to obtain subject blood sample
|
1
|
Baseline Characteristics
Compare Technegas Ventilation-Perfusion SPECT and Xenon Ventilation-Perfusion Planar Imaging for Pulmonary Embolism
Baseline characteristics by cohort
| Measure |
Overall Study
n=18 Participants
Xenon-133 Ventilation Planar imaging, followed by Technegas Ventilation SPECT imaging with Technetium-99m (Tc-99m) labeled carbon particles, followed by Technetium 99m (Tc-99m) MAA Perfusion imaging for the diagnosis of pulmonary embolism. Xe-133 V / Tc-99m MAA Q results compared to Technegas V / Tc-99m MAA Q results.
|
|---|---|
|
Age, Categorical
<=18 years
|
0 Participants
n=5 Participants
|
|
Age, Categorical
Between 18 and 65 years
|
12 Participants
n=5 Participants
|
|
Age, Categorical
>=65 years
|
6 Participants
n=5 Participants
|
|
Age, Continuous
|
59.5 years
n=5 Participants
|
|
Sex: Female, Male
Female
|
7 Participants
n=5 Participants
|
|
Sex: Female, Male
Male
|
11 Participants
n=5 Participants
|
|
Ethnicity (NIH/OMB)
Hispanic or Latino
|
8 Participants
n=5 Participants
|
|
Ethnicity (NIH/OMB)
Not Hispanic or Latino
|
10 Participants
n=5 Participants
|
|
Ethnicity (NIH/OMB)
Unknown or Not Reported
|
0 Participants
n=5 Participants
|
|
Race (NIH/OMB)
American Indian or Alaska Native
|
0 Participants
n=5 Participants
|
|
Race (NIH/OMB)
Asian
|
0 Participants
n=5 Participants
|
|
Race (NIH/OMB)
Native Hawaiian or Other Pacific Islander
|
0 Participants
n=5 Participants
|
|
Race (NIH/OMB)
Black or African American
|
8 Participants
n=5 Participants
|
|
Race (NIH/OMB)
White
|
10 Participants
n=5 Participants
|
|
Race (NIH/OMB)
More than one race
|
0 Participants
n=5 Participants
|
|
Race (NIH/OMB)
Unknown or Not Reported
|
0 Participants
n=5 Participants
|
|
Region of Enrollment
United States
|
18 participants
n=5 Participants
|
PRIMARY outcome
Timeframe: Prospective, 30 days follow-upPopulation: Pulmonary embolism adjudication was to be determined by an Independent Adjudication Committee for primary and secondary outcome data and blinded readings of Xe-133 and Technegas Ventilation and Tc-99m MAA Perfusion images were required for primary outcome data. Due to trial termination PE adjudication and blinded readings of images were not done.
Compared to the sensitivity of Xenon V/Q Planar imaging. "Truth" based on blinded reader's assessments of V/Q SPECT images compared with subject's final diagnosis resulting from clinical information at 30 days follow-up.
Outcome measures
Outcome data not reported
PRIMARY outcome
Timeframe: Prospective, 30 days follow-upPopulation: Pulmonary embolism adjudication was to be determined by an Independent Adjudication Committee for primary and secondary outcome data and blinded readings of Xe-133 and Technegas Ventilation and Tc-99m MAA Perfusion images were required for primary outcome data. Due to trial termination PE adjudication and blinded readings of images were not done.
Compared to the specificity of Xenon V/Q Planar imaging. "Truth" based on blinded reader's assessments of V/Q SPECT images compared with subject's final diagnosis resulting from clinical information at 30 days follow-up.
Outcome measures
Outcome data not reported
SECONDARY outcome
Timeframe: prospective, 30 days follow-up.Population: PE adjudication for final clinical diagnosis was to be determined by an Independent Adjudication Committee and blinded readings of Xe-133 and Technegas Ventilation and Tc-99m MAA Perfusion images were required for primary and secondary outcome data. Due to trial termination PE adjudication and blinded readings of images were not done.
Accuracy of V/Q imaging for diagnosis of PE is determined by the results of blind-read assessment of images compared with truth using a subject's final clinical diagnosis following 30-day follow-up of occurence of PE or death, whichever occurs first.
Outcome measures
Outcome data not reported
SECONDARY outcome
Timeframe: Prospective, 30 days follow-upPopulation: PE adjudication for final clinical diagnosis was to be determined by an Independent Adjudication Committee and blinded readings of Xe-133 and Technegas Ventilation and Tc-99m MAA Perfusion images were required for primary and secondary outcome data. Due to trial termination PE adjudication and blinded readings of images were not done.
PPV of V/Q imaging for diagnosis of PE is determined by the results of blind-read assessment of images compared with truth using a subject's final clinical diagnosis following 30-day follow-up of occurence of PE or death, whichever occurs first.
Outcome measures
Outcome data not reported
SECONDARY outcome
Timeframe: Prospective, 30 days follow-upPopulation: PE adjudication for final clinical diagnosis was to be determined by an Independent Adjudication Committee and blinded readings of Xe-133 and Technegas Ventilation and Tc-99m MAA Perfusion images were required for primary and secondary outcome data. Due to trial termination PE adjudication and blinded readings of images were not done.
NPV of V/Q imaging for diagnosis of PE is determined by the results of blind-read assessment of images compared with truth using a subject's final clinical diagnosis following 30-day follow-up of occurence of PE or death, whichever occurs first.
Outcome measures
Outcome data not reported
SECONDARY outcome
Timeframe: Prospective, 30 days follow-upPopulation: PE adjudication for final clinical diagnosis was to be determined by an Independent Adjudication Committee and blinded readings of Xe-133 and Technegas Ventilation and Tc-99m MAA Perfusion images were required for primary and secondary outcome data. Due to trial termination PE adjudication and blinded readings of images were not done.
Likelihood ratios of V/Q imaging for diagnosis of PE is determined by the results of blind-read assessment of images compared with truth using a subject's final clinical diagnosis following 30-day follow-up of occurence of PE or death, whichever occurs first.
Outcome measures
Outcome data not reported
SECONDARY outcome
Timeframe: Prospective, from enrollment through 30 days follow-upPopulation: All subjects who received Technegas and completed safety follow-up procedures.
Safety will be assessed by the incidence of treatment emergence adverse events and changes in clinical laboratory measurements, blood pressure, oxygen saturation, physical examination and pulmonary examination before and after treatment.
Outcome measures
| Measure |
Overall Study
n=12 Participants
Xenon-133 Ventilation Planar imaging, followed by Technegas Ventilation SPECT imaging with Technetium-99m (Tc-99m) labeled carbon particles, followed by Technetium 99m (Tc-99m) MAA Perfusion imaging for the diagnosis of pulmonary embolism. Xe-133 V / Tc-99m MAA Q results compared to Technegas V / Tc-99m MAA Q results.
|
|---|---|
|
Safety of Technegas in Patients With Possible PE
Serious adverse events
|
0 participants
|
|
Safety of Technegas in Patients With Possible PE
Other (not including serious) adverse events
|
1 participants
|
Adverse Events
Overall Study
Serious adverse events
Adverse event data not reported
Other adverse events
| Measure |
Overall Study
n=12 participants at risk
Xenon-133 Ventilation Planar imaging, followed by Technegas Ventilation SPECT imaging with Technetium-99m (Tc-99m) labeled carbon particles, followed by Technetium 99m (Tc-99m) MAA Perfusion imaging for the diagnosis of pulmonary embolism. Xe-133 V / Tc-99m MAA Q results compared to Technegas V / Tc-99m MAA Q results.
|
|---|---|
|
Investigations
Systolic blood pressure increase
|
8.3%
1/12 • Number of events 1 • 24 (+/- 4) hours post Technegas ventilation/perfusion (V/Q) scan.
Safety assessment was performed from the start of the Xe-133 ventilation scan, followed by the Technegas ventilation scan, followed by the Tc-99m MAA scan until 24 (+/- 4) hours after the Technegas ventilation scan.
|
Additional Information
Gary Somerville, Quality and Regulatory Manager
Cyclomedica Australia Pty Ltd
Results disclosure agreements
- Principal investigator is a sponsor employee
- Publication restrictions are in place