Blood Loss MassiveNCT06255496
QStat Cartridge in Obstetric Patients
An observational study of Blood Loss Massive and Post Partum Hemorrhage, run by HemoSonics LLC at 6 sites in United States.
Trial summary
This study will assess the performance of the Quantra System with the QStat Cartridge versus standard of care coagulation testing in pregnant women at risk of bleeding at delivery. Read more about this study
- Who is it for?
- Ages 18 to 50 years, women only
- Conditions the study is for
- Blood Loss Massive, Post Partum Hemorrhage
- What is being tested?
- Quantra Hemostasis Analyzer with the QStat Cartridge
- How many people
- 296 participants
- Where
- 6 sitesUnited States
- Study dates
- 9 May 2024to 30 Oct 2025
- 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 to 50 years
- Women only
- No healthy volunteers
- Adult
Study population: Parturients 18 years or older who are at risk of experiencing an obstetric hemorrhage around the time of delivery.
Who may be able to join
- Subject is greater than18 years.
- Subject is pregnant or at least 24 h postpartum
- Conventional coagulation tests and/or viscoelastic testing are ordered for concern of possible coagulopathy based on one or more clinical scenarios including hemorrhage, suspected or confirmed placental abruption, amniotic fluid embolism, or placenta accreta spectrum
- Subject or subject's LAR is willing to provide informed consent, either prospectively or by deferred consent.
Who cannot join
- Subject is younger than 18 years old.
- Subject or subject's LAR is unwilling or unable to provide informed consent, either prospectively or by deferred consent.
- Subject is incarcerated at the time of the study.
- Subject is currently enrolled in a distinct study that might confound the results of the proposed study
- Subject is affected by a condition that, in the opinion of the clinical team, may pose additional risks
Trial locations and contacts
6 sites in 1 country.
6 sites in 1 country
United States6 sites
Ohio State University Wexner Medical Center
Columbus, Ohio, 43210
Parkland Health
Dallas, Texas, 75235
University of Oklahoma Medical Center
Oklahoma City, Oklahoma, 73104
Magee Womens Hospital
Pittsburgh, Pennsylvania, 15213
University of Rochester Medical Center
Rochester, New York, 14642
University of Utah
Salt Lake City, Utah, 84112
About this study
Official title: Evaluation of the Clinical Performance of the Quantra® System With the QStat® Cartridge in Obstetric Patients
This study will assess the performance of the Quantra System with the QStat Cartridge versus standard of care coagulation testing in pregnant women at risk of bleeding at delivery.
Read the detailed description
The Quantra System is a fully integrated and automated in vitro diagnostic device which uses SEER Sonorheometry, an ultrasound-based technology, to characterize the viscoelastic properties of a whole blood sample during coagulation. The QStat Cartridge was developed to monitor hemostasis in patients that may experience a range of coagulopathies of various etiologies including fibrinolytic defects. These patients include the tobstetric hemorrhage population. The cartridge consists of four independent channels each containing different sets of reagents, which provide four measurements performed in parallel yielding five parameters that depict the functional status of a patient's coagulation system.
This multicenter, prospective, observational pilot study will evaluate the performance of the Quantra System with the QStat Cartridge as compared to standard of care coagulation testing in pregnant women at risk of bleeding at delivery.
- Conditions
- Blood Loss Massive, Post Partum Hemorrhage
- Being tested
- Quantra Hemostasis Analyzer with the QStat Cartridge
- Keywords
- Quantra, Viscoelastic testing, Coagulation
- Medical subject headings
- Postpartum Hemorrhage, Thrombosis
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
Quantra Hemostasis Analyzer with the QStat CartridgeDiagnostic test
Also called Quantra System, QStat Cartridge
Diagnostic device to monitor coagulation properties of a whole blood sample at the point-of-care.
| Study group | Role | What they receive |
|---|---|---|
| Obstetric Patients | Obstetric patient population at risk of experiencing excessive bleeding around the time of delivery Receives: Diagnostic Test: Quantra Hemostasis Analyzer with the QStat Cartridge |
What is being measured
The primary outcome is the main question the study is designed to answer.
Comparison of Quantra Clot Time to laboratory aPTT test results
Coagulation function assessed by Quantra Clot Time (CT, sec) and activated partial thromboplastin (aPTT, sec) test
Measured: At the time hemorrhage is suspected, anticipated within 24 hours after birth
Comparison of Quantra Fibrinogen Contribution to Clot Stiffness to laboratory coagulation fibrinogen test results
Coagulation function assessed by Quantra Fibrinogen Contribution to Clot Stiffness (FCS, hPa) and Clauss fibrinogen (mg/dL) test
Measured: At the time hemorrhage is suspected, anticipated within 24 hours after birth
Comparison of Quantra Clot Time to ROTEM delta INTEM CT test results
Coagulation function assessed by Quantra Clot Time (CT, sec) and ROTEM INTEM CT (sec) test
Measured: At the time hemorrhage is suspected, anticipated within 24 hours after birth
Comparison of Quantra Fibrinogen Contribution to Clot Stiffness to ROTEM delta FIBTEM test results
Coagulation function assessed by Quantra Fibrinogen Contribution to Clot Stiffness (FCS, hPa) and ROTEM FIBTEM (mm) test
Measured: At the time hemorrhage is suspected, anticipated within 24 hours after birth
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted13 Feb 2024
- Study start9 May 2024
- Primary completion15 Aug 2025
- Study completion30 Oct 2025
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for Blood Loss MassiveStudies of the same condition, open and under way.
- 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
- Observational model
- Cohort
- Time perspective
- Prospective
- Enrolment
- 296 participants (actual)
Sponsor and investigators
- Lead sponsor
- HemoSonics LLC
- Sponsor type
- Industry (pharma, biotech, devices)
- Responsible party
- Sponsor
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT06255496
- Sponsor's protocol ID
- HEMCS-048
- Status last verified
- Nov 2025
- First submitted
- 4 Feb 2024
- Last updated
- 14 Nov 2025
- Results posted
- No
- Data monitoring committee
- No
- FDA-regulated drug
- No
- FDA-regulated device
- Yes
- Individual data sharing
- No
Study at a glance
From the registry record, last updated by the sponsor on 14 Nov 2025. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Evaluation of the Clinical Performance of the Quantra® System With the QStat® Cartridge in Obstetric Patients
- ClinicalTrials.gov ID
- NCT06255496
- Acronym / sponsor ID
- HEMCS-048
- Conditions
- Blood Loss Massive, Post Partum Hemorrhage
- Keywords
- Quantra, Viscoelastic testing, Coagulation
- Study type
- Observational
- Recruitment status
- Completed
- Enrolment
- 296 participants (actual)
- Lead sponsor
- HemoSonics LLCIndustry (pharma, biotech, devices)
- Study start
- 9 May 2024 (actual)
- Primary completion
- 15 Aug 2025 (actual)
- Study completion
- 30 Oct 2025 (actual)
- First posted
- 13 Feb 2024 (actual)
- 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.
This study will assess the performance of the Quantra System with the QStat Cartridge versus standard of care coagulation testing in pregnant women at risk of bleeding at delivery.
Detailed description
The Quantra System is a fully integrated and automated in vitro diagnostic device which uses SEER Sonorheometry, an ultrasound-based technology, to characterize the viscoelastic properties of a whole blood sample during coagulation. The QStat Cartridge was developed to monitor hemostasis in patients that may experience a range of coagulopathies of various etiologies including fibrinolytic defects. These patients include the tobstetric hemorrhage population. The cartridge consists of four independent channels each containing different sets of reagents, which provide four measurements performed in parallel yielding five parameters that depict the functional status of a patient's coagulation system.
This multicenter, prospective, observational pilot study will evaluate the performance of the Quantra System with the QStat Cartridge as compared to standard of care coagulation testing in pregnant women at risk of bleeding at delivery.
Study design
- Observational model
- Cohort
- Time perspective
- Prospective
- Number of arms
- 1
| Arm | Type | Receives |
|---|---|---|
| Obstetric Patients | – | Diagnostic Test: Quantra Hemostasis Analyzer with the QStat CartridgeObstetric patient population at risk of experiencing excessive bleeding around the time of delivery |
Who may qualify
- Ages
- 18 to 50 years
- Sex
- Female only
- Healthy volunteers
- Not accepted
- Age groups
- Adult
- Study population
- Parturients 18 years or older who are at risk of experiencing an obstetric hemorrhage around the time of delivery.
Key inclusion criteria (4 listed)
- Subject is greater than18 years.
- Subject is pregnant or at least 24 h postpartum
- Conventional coagulation tests and/or viscoelastic testing are ordered for concern of possible coagulopathy based on one or more clinical scenarios including hemorrhage, suspected or confirmed placental abruption, amniotic fluid embolism, or placenta accreta spectrum
- Subject or subject's LAR is willing to provide informed consent, either prospectively or by deferred consent.
Key exclusion criteria (5 listed)
- Subject is younger than 18 years old.
- Subject or subject's LAR is unwilling or unable to provide informed consent, either prospectively or by deferred consent.
- Subject is incarcerated at the time of the study.
- Subject is currently enrolled in a distinct study that might confound the results of the proposed study
- Subject is affected by a condition that, in the opinion of the clinical team, may pose additional risks
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| Quantra Hemostasis Analyzer with the QStat CartridgeAlso: Quantra System, QStat CartridgeDiagnostic device to monitor coagulation properties of a whole blood sample at the point-of-care. | Diagnostic test | Obstetric Patients |
Primary outcome
Comparison of Quantra Clot Time to laboratory aPTT test results
Time frame: At the time hemorrhage is suspected, anticipated within 24 hours after birth
Coagulation function assessed by Quantra Clot Time (CT, sec) and activated partial thromboplastin (aPTT, sec) test
Comparison of Quantra Fibrinogen Contribution to Clot Stiffness to laboratory coagulation fibrinogen test results
Time frame: At the time hemorrhage is suspected, anticipated within 24 hours after birth
Coagulation function assessed by Quantra Fibrinogen Contribution to Clot Stiffness (FCS, hPa) and Clauss fibrinogen (mg/dL) test
Comparison of Quantra Clot Time to ROTEM delta INTEM CT test results
Time frame: At the time hemorrhage is suspected, anticipated within 24 hours after birth
Coagulation function assessed by Quantra Clot Time (CT, sec) and ROTEM INTEM CT (sec) test
Comparison of Quantra Fibrinogen Contribution to Clot Stiffness to ROTEM delta FIBTEM test results
Time frame: At the time hemorrhage is suspected, anticipated within 24 hours after birth
Coagulation function assessed by Quantra Fibrinogen Contribution to Clot Stiffness (FCS, hPa) and ROTEM FIBTEM (mm) test
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 14 Nov 2025.
- Individual participant dataSharing planned: No
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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.
The record lists no contact. Use the official record to reach the sponsor.
6 sites in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
An observational study of Blood Loss Massive and Post Partum Hemorrhage, run by HemoSonics LLC at 6 sites 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 4 inclusion and 5 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 14 Nov 2025. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 6 sites 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.
What does the primary outcome measure?
Comparison of Quantra Clot Time to laboratory aPTT test results (time frame: At the time hemorrhage is suspected, anticipated within 24 hours after birth). The study lists 4 primary outcomes in all. It is what the study was designed to measure, not a finding.
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 14 Nov 2025.