Deep Venous ThrombosisNCT00178789
Sonography Outcomes Assessment Program for Lower Extremity Deep Venous Thrombosis
An observational study of Deep Venous Thrombosis, run by The University of Texas Health Science Center, Houston at 1 site in United States.
Trial summary
Currently, most emergency physicians have limited access to obtaining formal radiology ultrasound studies, particularly overnight. Many are forced to adopt risky and expensive strategies in managing their patients with suspected deep venous thrombosis (DVT) who present during off-hours: for low risk patients… Read more about this study
- Who is it for?
- Ages 18 years and older
- Conditions the study is for
- Deep Venous Thrombosis
- How many people
- 51 participants
- Where
- 1 siteUnited States
- Study dates
- Sep 2005to May 2007
- Phase
- Observational
- Are there results?
- None posted in the registry
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 18 years and older
- All sexes
- No healthy volunteers
- Adult, Older adult
Who may be able to join
- Presenting signs and symptoms sufficiently suspicious for lower extremity DVT to warrant a formal radiology study in the opinion of the treating physician AND EITHER 2a. Moderate or high pre-test clinical probability of DVT (Wells Criteria) OR 2b. Low pre-test clinical probability of DVT with a positive D-dimer
Who cannot join
- Documented lower extremity DVT within the past 60 days
- Anatomic abnormality that, in the judgment of the investigator, would preclude imaging of both femoral and popliteal veins on the affected leg (i.e. above-knee amputation or severe scarring from intravenous drug abuse in the inguinal area)
- Patient below the age of 18 years.
Trial locations and contacts
1 site in 1 country.
United States1 site
Memorial Hermann Hospital Emergency Department
Houston, Texas, 77030
About this study
Official title: Prospective Observational Trial of Point-of-Care, Limited Ultrasonography (PLUS) for Lower Extremity Deep Venous Thrombosis in the Emergency Department: The Sonography Outcomes Assessment Program (SOAP-4 Trial)
Currently, most emergency physicians have limited access to obtaining formal radiology ultrasound studies, particularly overnight. Many are forced to adopt risky and expensive strategies in managing their patients with suspected deep venous thrombosis (DVT) who present during off-hours: for low risk patients, discharging without anticoagulation and arranging for outpatient studies; for moderate to high risk patients, empirically anticoagulating and admitting to the hospital to await definitive testing. If emergency physicians could reliably perform an accurate ultrasound exam for DVT, such risks could be obviated.
This is a prospective, observational cohort study assessing the accuracy of emergency physician diagnosis of proximal DVT using compact ultrasound equipment and a simplified compression technique. The value of color flow doppler and augmentation will also be assessed. Outcomes (sensitivity, specificity, positive likelihood ratio and negative likelihood ratio) will be assessed at 30 days.
Prior to enrolling patients in the study, emergency physicians will undertake a 2 hour training course on the performance of the simplified compression technique for the diagnosis of lower extremity DVT. Emergency physicians will perform the DVT ultrasound exam on study subjects with suspected DVT. Clinical management of the study subjects will not be altered; all subjects will proceed to receive a formal DVT ultrasound study by the radiology department which will serve as the criterion reference for the study.
- Conditions
- Deep Venous Thrombosis
- Keywords
- Deep Venous Thrombosis, Blood Clot, Lower Extremity, Sonography
- Medical subject headings
- Venous Thrombosis, Thrombosis
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted15 Sep 2005 (estimated)
- Study startSep 2005
- Study completionMay 2007
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for Deep Venous ThrombosisStudies of the same condition, open and under way.
- More trials run by The University of Texas Health Science Center, HoustonThe sponsor's other registered studies.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Observational
- Time perspective
- Other
- Enrolment
- 51 participants (estimated)
Sponsor and investigators
- Sponsor type
- University, hospital or other
- Investigators
- Gregory M Press, MD, Principal investigator, The University of Texas Health Science Center, Houston
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT00178789
- Sponsor's protocol ID
- HSC-MS-05-0011
- Status last verified
- May 2007
- First submitted
- 13 Sep 2005
- Last updated
- 23 May 2007
- Results posted
- No
Study at a glance
From the registry record, last updated by the sponsor on 23 May 2007. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Prospective Observational Trial of Point-of-Care, Limited Ultrasonography (PLUS) for Lower Extremity Deep Venous Thrombosis in the Emergency Department: The Sonography Outcomes Assessment Program (SOAP-4 Trial)
- ClinicalTrials.gov ID
- NCT00178789
- Acronym / sponsor ID
- HSC-MS-05-0011
- Conditions
- Deep Venous Thrombosis
- Keywords
- Deep Venous Thrombosis, Blood Clot, Lower Extremity, Sonography
- Study type
- Observational
- Recruitment status
- Completed
- Enrolment
- 51 participants (estimated)
- Lead sponsor
- The University of Texas Health Science Center, HoustonUniversity, hospital or other
- Study start
- Sep 2005
- Study completion
- May 2007 (actual)
- First posted
- 15 Sep 2005 (estimated)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
Currently, most emergency physicians have limited access to obtaining formal radiology ultrasound studies, particularly overnight. Many are forced to adopt risky and expensive strategies in managing their patients with suspected deep venous thrombosis (DVT) who present during off-hours: for low risk patients, discharging without anticoagulation and arranging for outpatient studies; for moderate to high risk patients, empirically anticoagulating and admitting to the hospital to await definitive testing. If emergency physicians could reliably perform an accurate ultrasound exam for DVT, such risks could be obviated.
This is a prospective, observational cohort study assessing the accuracy of emergency physician diagnosis of proximal DVT using compact ultrasound equipment and a simplified compression technique. The value of color flow doppler and augmentation will also be assessed. Outcomes (sensitivity, specificity, positive likelihood ratio and negative likelihood ratio) will be assessed at 30 days.
Prior to enrolling patients in the study, emergency physicians will undertake a 2 hour training course on the performance of the simplified compression technique for the diagnosis of lower extremity DVT. Emergency physicians will perform the DVT ultrasound exam on study subjects with suspected DVT. Clinical management of the study subjects will not be altered; all subjects will proceed to receive a formal DVT ultrasound study by the radiology department which will serve as the criterion reference for the study.
Study design
- Time perspective
- Other
Who may qualify
- Ages
- 18 years and older
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Adult, Older adult
Key inclusion criteria (1 listed)
Key exclusion criteria (3 listed)
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Primary outcome
Not reported in the source record.
Results and safety
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 23 May 2007.
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
Gregory M Press, MD principal investigator
The University of Texas Health Science Center, Houston
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
An observational study of Deep Venous Thrombosis, run by The University of Texas Health Science Center, Houston at 1 site in United States.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 1 inclusion and 3 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: finished, as of the sponsor's last update on 23 May 2007. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in United States. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
Are results available for this study?
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 23 May 2007.