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Simple blood test may predict Post-Surgery clot risk

NCT ID NCT00901160

Knowledge-focused Sponsor: McMaster University Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed
The trial has finished. Results may not be published yet.
Stopped early This study
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jun 27, 2026 · Last updated Jun 27, 2026

Summary

This pilot study aimed to see if a blood test called thromboelastography (TEG) and platelet mapping could predict clotting or bleeding complications after non-cardiac surgery. The study included 200 patients who were taking aspirin or clopidogrel for at least 10 days before elective surgery. The goal was to understand if the test results could identify patients at higher risk for complications like heart attack, stroke, or bleeding.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Participants

200 people

The number who actually took part.

Started

Jan 2008

Finished

Jun 2011

Lead sponsor

Other sponsor

The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Who is studied

Patients who are having non-ambulatory, non-cardiac, elective surgery

Ages

40 to 85 years

Sex

Anyone

Healthy volunteers

Not accepted

This study is not open to healthy volunteers. The entry requirements below say who it is open to.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: * patients on aspirin and/or clopidogrel for at least 10 days, having non-ambulatory, non-cardiac, elective surgery Exclusion Criteria: * anemia (Hb \< 100) or thrombocytopenia (platelet count \< 80), having any known clotting abnormalities * family history of clotting abnormalities * concurrently on NSAIDs, warfarin therapy or other treatments affecting platelet function * renal impairment (Cr \> 110 mg for females or Cr \> 125 mg) or INR \> 1.2

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Conditions

The condition(s) this trial relates to.

blood coagulation disease thrombotic disease

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Blood clotting

Contacts and locations

Locations

  • Hamilton Health Sciences

    Hamilton, Ontario, L8L 2X2, Canada

  • University Health Network

    Toronto, Ontario, M5G 2C4, Canada