CT for Pulmonary Thromboembolic Disease (CT for PE)

Individually Optimized Uniform Contrast Enhancement in CT Angiography for the Diagnosis of Pulmonary Thromboembolic Disease

Examine the feasibility and efficacy of individually optimized uniform contrast enhancement in CT pulmonary angiography (CTPA) for the diagnosis of pulmonary thromboembolic disease.

Study Overview

• Status: Terminated
• Conditions: Pulmonary Embolism

Detailed Description

Patient characteristics, qualitative image quality scores, and quantitative contrast enhancement and CNR will be described using mean values and standard deviations for continuous variables, and frequencies and percent for categorical variables. Difference between the two patient groups will be compared using Wilcoxon signed rank tests and chi-square statistics for continuous and categorical variables, respectively. All statistical tests will be performed at a significance level of 0.05.

• Study Type: Observational
• Enrollment (Actual): 2

Contacts and Locations

Study Locations

• United States
  • Maryland
    • Baltimore, Maryland, United States, 21201
      • University of Maryland Medical Center

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 18 years and older (Adult, Older Adult)
• Accepts Healthy Volunteers: No
• Genders Eligible for Study: All

• Sampling Method: Non-Probability Sample

Study Population

Obese patients for a diagnosis of PE

Description

Inclusion Criteria:

• Patients 18 years old or older
• Patients who have been recommended for CTPA scan for the diagnosis of pulmonary; thromboembolic disease (PE) in the Department of Diagnostic Radiology and Nuclear Medicine at the University of Maryland-Patients whose body mass index (BMI) is greater than 30 kg/m2.
• Patients whose body mass index (BMI) is greater than 30 kg/m2
• Patients who signed the University of Maryland Medical Center Consent for Intravenous Contrast Administration

Exclusion Criteria:

• Pregnant or breast-feeding women; Female participants of childbearing age (10 - 60 years) will be screened for their pregnancy status prior to study registration, by following the Department of Diagnostic Radiology and Nuclear Medicine CLINICAL STANDARD Procedure DI-AOP-003 "Pregnancy Screening Documentation"; - Patients with decreased renal function34-36. This is evaluated by blood work checked within 30 days prior to the CTPA scan with contrast. Patients cannot receive contrast if their BUN index is not within [7-20] or creatinine is not within [0.5 - 1.4] mg/dL
• Patients with decreased renal function34-36. This is evaluated by blood work checked within current admission for inpatients or within 30 days for outpatients prior to the CTPA scan with contrast. Patients cannot receive contrast if their serum creatinine level exceeds 2.0 mg/dL
• Patients with known moderate or severe allergic reactions to contrast, including but not limited to: shortness of breath, a change in baseline vital signs, such as a change in blood pressure, tachycardia, increased respirations that can progress to major respiratory distress, laryngeal edema, bronchospasm, arrhythmias, convulsions, and cardiopulmonary arrest.

Study Plan

How is the study designed?

Number of groups / cohorts

2

Cohorts and Interventions

Group / Cohort
Prospective; Twenty patients will be enrolled and scanned with the RESEARCH procedures
Retrospective; Patients with matching age and BMI will be selected from existing patients with a CLINICAL STANDARD of Care CTPA scan.

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Feasibility of patients with individually optimized bi-phasic contrast injection for CTPA scan	The primary endpoint is to study the feasibility( bi-phasic vs. singular pahse contrast injection (by comparison analysis)) of individually optimized bi-phasic contrast injection for CTPA scan.	1 year
Efficacy of PE diagnosis with CTPA imaging	To quantify the efficacy (by comparison analysis) of PE diagnosis of this new contrast injection protocol in terms of reduced frequency of non-diagnostic CTPA image vs. standard of care procedures.	1 year

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
# of patients who receive contrast enhancement and CNR of CTPA scans	A secondary endpoint is to quantitatively evaluate (by comparison analysis) the contrast enhancement and CNR of CTPA scans. Twenty patients (20) will be enrolled and scanned with the RESEARCH procedures. Another twenty retrospective patients (20) with matching age and BMI will be selected from existing patients with a CLINICAL STANDARD of Care CTPA scan and enrolled on retrospective protocol: HP-00056512 "Individually optimized uniform contrast enhancement in CT angiography for the diagnosis of pulmonarythromboembolic disease - A simulation study".	1 year

Collaborators and Investigators

• Sponsor: University of Maryland, Baltimore
• Investigators: Principal Investigator: Wei Lu, PhD, Univerysity of Maryland Baltimore

Study record dates

Study Major Dates

• Study Start: February 1, 2016
• Primary Completion (Actual): May 1, 2016
• Study Completion (Actual): May 1, 2016

Study Registration Dates

• First Submitted: August 29, 2014
• First Submitted That Met QC Criteria: September 12, 2014
• First Posted (Estimate): September 16, 2014

Study Record Updates

• Last Update Posted (Actual): March 18, 2020
• Last Update Submitted That Met QC Criteria: March 16, 2020
• Last Verified: March 1, 2020

More Information

Terms related to this study

• Keywords: Lung; Pulmonary; Thromboembolic
• Additional Relevant MeSH Terms: Cardiovascular Diseases; Vascular Diseases; Respiratory Tract Diseases; Lung Diseases; Embolism and Thrombosis; Embolism; Thromboembolism; Pulmonary Embolism
• Other Study ID Numbers: HP-00063432

Plan for Individual participant data (IPD)

• Plan to Share Individual Participant Data (IPD)?: NO