Use of Rotational Thromboelastometry (ROTEM) to Characterize Coagulation Abnormalities in Burn Patients: A Prospective Pilot Study

Use of Rotational Thromboelastometry (ROTEM) to Characterize Coagulation Abnormalities in Burn Patients

Sponsors

Lead sponsor: Weill Medical College of Cornell University

Source Weill Medical College of Cornell University
Brief Summary

This is an interventional pilot study of 40 burn inpatients. Specific aims of the proposed pilot study are to use bedside blood analysis with rotational thromboelastometry (ROTEM) in severe burn patients to provide preliminary information on the nature of coagulation abnormalities and compare subject ROTEM coagulation profiles within 24 hours of burn injury (day 1) and on days 2, 3, 5, 7, 14 and 21 after burn injury.

Detailed Description

Specific aims of this pilot study are to use bedside blood analysis with ROTEM in severe burn patients to provide preliminary information on the nature of coagulation abnormalities and to compare subject ROTEM coagulation profiles within 24 hours of burn injury (day 1) and on days 2, 3, 5, 7, 14 and 21 after burn injury. Investigators hypothesize that ROTEM analysis will detect a pattern of impaired coagulation in severely burned patients.

ROTEM analysis:

A blood sample and reagents are placed into a small cup. A pin suspended from a wire is immersed into the sample. The pin rotates back and forth at a fixed angle. The movement of the pin is optically monitored and converted into a real time measurement that is represented graphically. Prior to clot formation, pin rotation is unhindered and is graphically represented as a straight line. As the subject's blood sample starts to clot, strands of clot form between the pin and the cup wall, restricting the movement of the pin depending on the strength of the clot. Graphically, this is represented as a symmetrical widening of the curve. Blood will be obtained for ROTEM/ fibrinogen levels from each subject seven times during their hospital admission: once within 24 hours of burn injury (day 1), and on days 2, 3, 5, 7, 14 and 21. For each sample, 5.4 mL of whole blood will be collected into 2 citrated tubes (2.7 mL in each tube). For all subjects, both pediatric and adult, blood will be collected via an indwelling catheter (arterial or central line). One 2.7 ml tube will be used for ROTEM analysis. The amount of blood is in accordance with the acceptable limit of ROTEM analysis. ROTEM testing will be performed according to the manufacturer's instructions using test kit reagents. Members of the clinical research team who have been trained and certified to use the ROTEM device will perform the appropriate ROTEM tests. The second 2.7 mL citrated tube will be used to measure fibrinogen level, using the automated central laboratory device in hospital.

In this interventional study, the ROTEM data will be blinded to the treating Burn ICU physicians and will have no effect on standard perioperative and ICU treatment. The ROTEM machine will be located in a designated spot outside of the ICU, out of view of the treating clinicians. Thus, volume replacement, thrombosis prophylaxis, and other management (including blood product transfusions) will be performed according to existing protocols.

Demographic information will be de-identified, but will include demographics (age, sex) and each subject's medical and surgical history, burn injury type (thermal, chemical, electrical, inhalational, plus/minus additional injury - i.e. Trauma/TBI, etc) and percent Total Body Surface Area (TBSA) as diagrammed by the Burn ICU on admission, medications (specifically, form of venous thromboembolism prophylaxis as prescribed by ICU physicians during the study period), weight, vital signs, dates of surgical intervention (bedside escharotomies and OR procedures), dates and types of blood product administration, fluid balance per day, number of days intubated, number of ICU days, hospital LOS, mortality, and ISS. Laboratory values: (on days 1, 2, 3, 5, 7, 14, and 21) will include fibrinogen, PT, INR, aPTT, and CBC when available as standard of care.

Overall Status Terminated
Start Date January 2015
Completion Date June 2016
Primary Completion Date June 2016
Phase N/A
Study Type Interventional
Primary Outcome
Measure Time Frame
Coagulation Parameters 21 days
Secondary Outcome
Measure Time Frame
Predictive Value of ROTEM Data 21 days
Enrollment 2
Condition
Intervention

Intervention type: Device

Intervention name: ROTEM

Description: A blood sample and reagents are placed into a small cup. A pin suspended from a wire is immersed into the sample. The pin rotates back and forth at a fixed angle. The movement of the pin is optically monitored and converted into a real time measurement that is represented graphically. Prior to clot formation, pin rotation is unhindered and is graphically represented as a straight line. As the subject's blood sample starts to clot, strands of clot form between the pin and the cup wall, restricting the movement of the pin depending on the strength of the clot. Graphically, this is represented as a symmetrical widening of the curve.

Arm group label: ROTEM

Other name: ROTEM delta

Eligibility

Criteria:

Inclusion Criteria:

1. Consecutive patients admitted to NYPH with 15% TBSA burn or greater.

2. Patients with vascular access catheters (arterial or central line) placed within 24 hours of burn injury

3. Males and females

4. Ages >3 years or >15 kg

5. Informed verbal consent obtained from the patient or the patient's designated health care proxy (DHCP). In the case of minors, assent and informed verbal consent obtained from at least one parent or guardian.

Exclusion Criteria:

1. Known pre-existing hemostatic abnormalities

2. Ages < 3 years or weight < 15 kg

3. Intake of anticoagulants or antiplatelet aggregation inhibitors prior to burn

4. Pregnant patients

5. Patients with delayed presentation (greater than 24 hours after burn injury)

6. Inclusion in another clinical research study

7. Refusal or inability of patient or patient's DHCP to consent in English.

Gender: All

Minimum age: 3 Years

Maximum age: 100 Years

Healthy volunteers: No

Overall Official
Last Name Role Affiliation
Christine Lennon, MD Principal Investigator Weill Cornell Medicine
Location
facility Weill Cornell Medical College
Location Countries

United States

Verification Date

June 2018

Responsible Party

Responsible party type: Sponsor

Keywords
Has Expanded Access No
Condition Browse
Number Of Arms 1
Arm Group

Arm group label: ROTEM

Arm group type: Experimental

Description: Clinical burn ICU Inpatients receiving blood draws for ROTEM analysis and fibrinogen levels.

Patient Data No
Study Design Info

Allocation: N/A

Intervention model: Single Group Assignment

Primary purpose: Other

Masking: None (Open Label)

Source: ClinicalTrials.gov