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Clinical Trial Details — Status: Not yet recruiting

Administrative data

NCT number NCT04623294
Other study ID # NIRS for brain death and coma
Secondary ID
Status Not yet recruiting
Phase
First received
Last updated
Start date November 10, 2020
Est. completion date December 31, 2022

Study information

Verified date November 2020
Source Chinese Academy of Medical Sciences
Contact n/a
Is FDA regulated No
Health authority
Study type Observational [Patient Registry]

Clinical Trial Summary

This study aims to assess brain death and deep coma with the self-made near infrared spectroscopy (NIRS) instrument. The investigators used the noninvasive method to monitor the Δ[HbO2] (the concentration changes in oxy-hemoglobin) and Δ[Hb] (the concentration changes in deoxy-hemoglobin) in the region around the forehead of medically evaluated participating patients and healthy subjects. A multiple-phase protocol at varied fraction of inspired O2 were utilized during the assessment.


Description:

Brain death is an irreversible loss of all brain functions, while deep coma is a profound state of unconsciousness associated with depressed cerebral activity. Timely distinguishing the two states is crucial for saving patients. The noninvasive, sensitive, universally available, and timely ancillary method to assess brain death and deep coma has not been established. This study aims to explore a noninvasive and straightforward way in brain death and deep coma online assessment. The changes of hemodynamic parameters including oxyhemoglobin (HbO2) and deoxyhemoglobin (Hb) were detected by near infrared spectroscopy instrument attached on the forehead of participators. A multiple-phase protocol at varied fraction of inspired O2(FIO2) were utilized during the assessment. Then the investigators compared the multiple physiological parameters changes among different groups at different FIO2.


Recruitment information / eligibility

Status Not yet recruiting
Enrollment 75
Est. completion date December 31, 2022
Est. primary completion date March 31, 2021
Accepts healthy volunteers Accepts Healthy Volunteers
Gender All
Age group 20 Years to 80 Years
Eligibility Inclusion Criteria: - Patients who have had brain death or serious brain trauma. - Patients who have deep coma with autonomous respiration according to GCS coma Scale - Healthy people who are interested in optical assessment of hemodynamic parameters Exclusion Criteria: - Patients who are in pregnancy or have plan to conception. - Patients who have vertebra surgery or have plan of surgery. - Patients who are inappropriate to join this trial judged by the radiologists or specialists. - AIDS, Active Hepatitis, Tuberculosis, Syphilis - Patients who regularly take anticoagulants, antiplatelet drugs

Study Design


Related Conditions & MeSH terms


Intervention

Procedure:
Oxygen supply of high-low-high procedure
The protocol consisted of 1-hour resting, 3-minute baseline measurement, half-hour measurement at 60% FIO2(phase I, high oxygen), half-hour measurement at 40% FIO2 (phase II, low oxygen) and half-hour measurement at 60% FIO2 (phase III, high oxygen). Device: Optical monitor for hemodynamic parameter. Near infrared spectroscopy instrument was attached on the subjects' forehead to detect the changes of hemodynamic parameters.
Oxygen supply of low-high-low procedure
The protocol consisted of 1- hour resting, 3-minute baseline measurement, half-hour measurement at 40% FIO2 (phase I, low oxygen), half-hour measurement at 60% FIO2 (phase II, high oxygen) and half-hour measurement at 40% FIO2 (phase III, low oxygen). Device: Optical monitor for hemodynamic parameter. Near infrared spectroscopy instrument was attached on the subjects' forehead to detect the changes of hemodynamic parameters.

Locations

Country Name City State
China NIRS assessment for brain death Tianjin Tianjin

Sponsors (1)

Lead Sponsor Collaborator
Chinese Academy of Medical Sciences

Country where clinical trial is conducted

China, 

References & Publications (1)

Pan B, Huang C, Fang X, Huang X, Li T. Noninvasive and sensitive optical assessment of brain death. J Biophotonics. 2019 Mar;12(3):e201800240. doi: 10.1002/jbio.201800240. Epub 2018 Dec 13. — View Citation

Outcome

Type Measure Description Time frame Safety issue
Primary ?[HbO2] The changes of oxyhemoglobin concentrations in prefrontal cortex. 1 day during the whole experiment
Primary ?[Hb] The changes of deoxyhemoglobin concentrations in prefrontal cortex. 1 day during the whole experiment
Secondary Heart rate Heart rate of patient recorded by bed-side physiological monitor. 1 day during the whole experiment
Secondary Blood pressure Blood pressure of patient recorded by bed-side physiological monitor. 1 day during the whole experiment
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