Critical CareNCT04744701
A Comparison of Laboratory Versus Point of Care (Bedside) APTT Testing
An observational study of Critical Care and Child, run by University of Leeds at 1 site in United Kingdom.
Trial summary
The overall aim of the study is to determine whether point-of-care (bedside) Activated Partial Thromboplastin Time (APTT) testing would be better than laboratory APTT testing in the PICU population (restricted to children under 16 years of age). Read more about this study
- Who is it for?
- Ages Up to 15 years
- Conditions the study is for
- Critical Care, Child
- What is being tested?
- Hemochron Signature Elite Whole Blood Microcoagulation System
- How many people
- 48 participants
- Where
- 1 siteUnited Kingdom
- Study dates
- 10 Feb 2020to 1 Apr 2020
- 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 Up to 15 years
- All sexes
- Child
Study population: Patients admitted to Paediatric Intensive Care Unit under the age of 16 years
Who may be able to join
- Patients admitted to Paediatric Intensive Care Unit under the age of 16 years
Who cannot join
- -
Trial locations and contacts
1 site in 1 country.
United Kingdom1 site
Leeds Children's Hospital
Leeds, West Yorkshire, LS1 3EX
About this study
Official title: A Comparison of Laboratory APTT Testing Versus Point of Care (Bedside) Activated Partial Thromboplastin Time (APTT) Testing in the Paediatric Intensive Care Population: An Assessment of Accuracy, Time Efficiency, and Cost-effectiveness
The overall aim of the study is to determine whether point-of-care (bedside) Activated Partial Thromboplastin Time (APTT) testing would be better than laboratory APTT testing in the PICU population (restricted to children under 16 years of age).
Read the detailed description
The overall aim of the study is to determine whether point-of-care (bedside) Activated Partial Thromboplastin Time (APTT) testing would be better than laboratory APTT testing in the PICU population (restricted to children under 16 years of age). To do this the investigators need to compare both forms of testing in the following areas:
- Accuracy - using laboratory results as our control the investigators want to ascertain how reliable Point-of-care (bedside) testing with the Hemochron Signature Elite is by comparing paired samples. The Hemochron Signature Elite Whole Blood Microcoagulation System is a battery-operated, hand-held instrument that performs individual point-of-care coagulation tests, including APTT, on fresh or citrated whole blood. The Hemochron Signature Elite instrument is CE marked and complies with multiple safety standard requirements and directives. The investigators know that the Hemochron Signature Elite is not 100% accurate compared to the laboratory but the degree of inaccuracy, particularly in the paediatric population is not clear, if within acceptable \& predictable limits the investigators would still be able to use this in clinical practice.
- Time efficiency - in view of the fact the Hemochron Signature Elite is on PICU, results from this will be almost immediately available. The investigators then want to measure exactly how long it takes from the moment the laboratory sample is taken for the results to be available.
- Cost-effectiveness - the investigators want to compare the costs of these two types of testing in detail, including costs for the Hemochron Signature Elite machine, Hemochron Signature Elite cuvettes, laboratory Clotting Screen bottles, laboratory Clotting Screen analysis, and maintaining the two different types of equipment. The investigators will also take into account any other regular costs (e.g. porters to take samples to the laboratory when the pod system is down). The investigators plan on seeking assistance from senior paediatric colleagues with more experience of health economics in doing a costs minimisation analysis
- Conditions
- Critical Care, Child
- Being tested
- Hemochron Signature Elite Whole Blood Microcoagulation System
- Keywords
- Thromboplastin
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
Hemochron Signature Elite Whole Blood Microcoagulation SystemDiagnostic test
Bedside test of Activated Partial Thromboplastin Time
What is being measured
The primary outcome is the main question the study is designed to answer.
Accuracy of APTT result (measured in seconds) provided by Hemochron Signature Elite compared to standard laboratory APTT value as gold standard (measured in seconds) on paired samples, using Pearson Correlation
APTT measured on fresh whole blood using Hemochron Signature Elite, the device converts this to a plasma equivalent value for clinical use, reported in seconds. The gold standard laboratory assay in our Trust uses ACL Top 750 Analyser, with APTT reported in seconds. Pearson Correlation Co-efficient will be used to determine level of agreement.
Measured: 6 hours
Secondary outcomes (2)
Mean time efficiency of Hemochron Signature Elite to provide APTT result (measured in minutes till APTT result being available), compared to the mean time taken (in minutes) for the standard laboratory measure of APTT result to become available.
Investigators will calculate the mean time difference between results being obtained using Hemochron Signature Elite point of care (bedside) testing using the time recorded on the data collection sheet and comparing this with the mean time the results were released by the standard hospital laboratory which is stated on the hospital results server. The laboratory staff will be blinded to ensure the timings are a genuine reflection of standard care within the hospital. Time taken for each method of APTT measurement will be measured from the moment the samples are obtained from participants until the result becomes available. Mean time taken by each method across all participants will be compared.
Measured: 6 hours
Cost effectiveness (in £ GBP) of Hemochron Signature Elite point of care APTT testing compared to standard laboratory measurement of APTT. This will be reported as overall mean cost (in £ GBP) to provide 1 APTT result using each system, for comparison.
Costs will be determined by combining the fixed costs such as the costs of analyzers, quality control testing, cuvettes and sampling equipment with the variable costs such as utilisation of porters to transport samples when the air-tube system is not working. Costs related to the Hemochron Signature Elite will be as per the manufacturer's price list. The cost of routine laboratory testing will be obtained from the Hospital pathology services management team
Measured: 1 day
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted9 Feb 2021
- Study start10 Feb 2020
- Primary completion1 Apr 2020
- Study completion1 Apr 2020
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for Critical CareStudies 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
- 48 participants (actual)
Sponsor and investigators
- Lead sponsor
- University of Leeds
- Sponsor type
- University, hospital or other
- Responsible party
- Principal investigator, Dr Tim Lee, University of Leeds
- Investigators
- Tim Lee, MD, PhD, Principal investigator, University of Leeds
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT04744701
- Sponsor's protocol ID
- 239600
- Status last verified
- Feb 2021
- First submitted
- 28 Jan 2021
- Last updated
- 9 Feb 2021
- 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 9 Feb 2021. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- A Comparison of Laboratory APTT Testing Versus Point of Care (Bedside) Activated Partial Thromboplastin Time (APTT) Testing in the Paediatric Intensive Care Population: An Assessment of Accuracy, Time Efficiency, and Cost-effectiveness
- ClinicalTrials.gov ID
- NCT04744701
- Acronym / sponsor ID
- 239600
- Conditions
- Critical Care, Child
- Keywords
- Thromboplastin
- Study type
- Observational
- Recruitment status
- Completed
- Enrolment
- 48 participants (actual)
- Lead sponsor
- University of LeedsUniversity, hospital or other
- Study start
- 10 Feb 2020 (actual)
- Primary completion
- 1 Apr 2020 (actual)
- Study completion
- 1 Apr 2020 (actual)
- First posted
- 9 Feb 2021 (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.
The overall aim of the study is to determine whether point-of-care (bedside) Activated Partial Thromboplastin Time (APTT) testing would be better than laboratory APTT testing in the PICU population (restricted to children under 16 years of age).
Detailed description
The overall aim of the study is to determine whether point-of-care (bedside) Activated Partial Thromboplastin Time (APTT) testing would be better than laboratory APTT testing in the PICU population (restricted to children under 16 years of age). To do this the investigators need to compare both forms of testing in the following areas:
- Accuracy - using laboratory results as our control the investigators want to ascertain how reliable Point-of-care (bedside) testing with the Hemochron Signature Elite is by comparing paired samples. The Hemochron Signature Elite Whole Blood Microcoagulation System is a battery-operated, hand-held instrument that performs individual point-of-care coagulation tests, including APTT, on fresh or citrated whole blood. The Hemochron Signature Elite instrument is CE marked and complies with multiple safety standard requirements and directives. The investigators know that the Hemochron Signature Elite is not 100% accurate compared to the laboratory but the degree of inaccuracy, particularly in the paediatric population is not clear, if within acceptable \& predictable limits the investigators would still be able to use this in clinical practice.
- Time efficiency - in view of the fact the Hemochron Signature Elite is on PICU, results from this will be almost immediately available. The investigators then want to measure exactly how long it takes from the moment the laboratory sample is taken for the results to be available.
- Cost-effectiveness - the investigators want to compare the costs of these two types of testing in detail, including costs for the Hemochron Signature Elite machine, Hemochron Signature Elite cuvettes, laboratory Clotting Screen bottles, laboratory Clotting Screen analysis, and maintaining the two different types of equipment. The investigators will also take into account any other regular costs (e.g. porters to take samples to the laboratory when the pod system is down). The investigators plan on seeking assistance from senior paediatric colleagues with more experience of health economics in doing a costs minimisation analysis
Study design
- Observational model
- Cohort
- Time perspective
- Prospective
Who may qualify
- Ages
- Up to 15 years
- Sex
- All
- Age groups
- Child
- Study population
- Patients admitted to Paediatric Intensive Care Unit under the age of 16 years
Key inclusion criteria (1 listed)
- Patients admitted to Paediatric Intensive Care Unit under the age of 16 years
Key exclusion criteria (1 listed)
- -
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 |
|---|---|---|
| Hemochron Signature Elite Whole Blood Microcoagulation SystemBedside test of Activated Partial Thromboplastin Time | Diagnostic test | – |
Primary outcome
Accuracy of APTT result (measured in seconds) provided by Hemochron Signature Elite compared to standard laboratory APTT value as gold standard (measured in seconds) on paired samples, using Pearson Correlation
Time frame: 6 hours
APTT measured on fresh whole blood using Hemochron Signature Elite, the device converts this to a plasma equivalent value for clinical use, reported in seconds. The gold standard laboratory assay in our Trust uses ACL Top 750 Analyser, with APTT reported in seconds. Pearson Correlation Co-efficient will be used to determine level of agreement.
2 secondary outcomes
Mean time efficiency of Hemochron Signature Elite to provide APTT result (measured in minutes till APTT result being available), compared to the mean time taken (in minutes) for the standard laboratory measure of APTT result to become available.
Time frame: 6 hours
Cost effectiveness (in £ GBP) of Hemochron Signature Elite point of care APTT testing compared to standard laboratory measurement of APTT. This will be reported as overall mean cost (in £ GBP) to provide 1 APTT result using each system, for comparison.
Time frame: 1 day
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 9 Feb 2021.
- 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.
Tim Lee, MD, PhD principal investigator
University of Leeds
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 Critical Care and Child, run by University of Leeds at 1 site in United Kingdom.
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 1 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 9 Feb 2021. 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 Kingdom. 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?
Accuracy of APTT result (measured in seconds) provided by Hemochron Signature Elite compared to standard laboratory APTT value as gold standard (measured in seconds) on paired samples, using Pearson Correlation (time frame: 6 hours). 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 9 Feb 2021.