arterial tonometry
DESCRIPTION
Arterial Tonometry. Preston Broderick, MA University of Pennsylvania. Arterial Tonometry. Non-invasive device used to obtain Pulse Wave Analysis (PWA), Pulse Wave Velocity (PWV) To be performed immediately after the MRI ~30 minute procedure Participant must be laying down - PowerPoint PPT PresentationTRANSCRIPT
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Arterial Tonometry
Preston Broderick, MA
University of Pennsylvania
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Arterial Tonometry Non-invasive device used to obtain Pulse
Wave Analysis (PWA), Pulse Wave Velocity (PWV)
To be performed immediately after the MRI ~30 minute procedure Participant must be laying down Do not include PHI in the database
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Arterial TonometryAdding a subject to the database
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Arterial Tonometry Information that must be entered
ID First Initial Last Initial Year of Birth Sex
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Arterial Tonometry
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Arterial Tonometry Pulse Wave Analysis
Obtain BP measurements using an Omron HEM-907 device
Use that data to calculate the mean arterial pressure with the following equation:
• MAP = DBP + 0.4 (SBP-DBP)
Type the sbp in the notes section as “SBP: x” Indicate which side the radial tonometry is being
performed in the notes section Enter data into PWA subject screen as follows
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Arterial TonometryPulse Wave Analysis (Radial)
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Data acquisition Relax your arms and hands Maintain a constant pressure Acquire 12 seconds of data Complete acquisition by pressing the space bar Goal is to achieve good consistency and height in the
waveforms Shoot for as high an operating index as possible
• Ideal target: >90 for radial
• Ideal target: >80 for carotid
Arterial Tonometry
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Arterial Tonometry
12 Seconds of consistent data acquisition
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Arterial TonometryFavorable Result: 94 Operator Index
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Arterial TonometryUnfavorable Result: 0 Operator Index
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Arterial TonometryPulse Wave Analysis (Carotid)
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Arterial TonometryPulse Wave Analysis (Carotid)
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Arterial Tonometry
12 Seconds of consistent data acquisition
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Arterial TonometryFavorable Result: 95 Operator Index
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Arterial TonometryUnfavorable Result: 5 Operator Index
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Arterial Tonometry Pulse Wave Velocity
Measure distance (mm) between carotid artery and sternal notch
Measure distance (mm) between femoral artery and sternal notch
Shoot for lowest standard deviation possible• Ideal target <10% SD
Place ECG electrodes on subject prior to acquisition
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Arterial TonometryPulse Wave Velocity
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Arterial TonometryPulse Wave Velocity (Carotid)
12 Seconds of consistent data acquisition
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Arterial TonometryPulse Wave Velocity
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Arterial TonometryPulse Wave Velocity (Femoral)
12 Seconds of consistent data acquisition
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Arterial TonometryFavorable Result: 7% SD
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Arterial TonometryUnfavorable Result: 13% SD
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Arterial Tonometry Exporting data from software
This is the data that will be used for analysis Export text file after each study visit Three exports for each visit
• PWA Radial• PWA Carotid• PWV
Choose result with highest operator index to export Keep organized by subject ID, visit number, and result
• 001_B_PWAR• 001_B_PWAC• 001_F_PWV
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Data Export
Arterial Tonometry
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Arterial TonometryData Export
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Arterial TonometryData Export
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Arterial TonometryData Export
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Arterial Tonometry Backing up the database
Imperative in case of data loss Backup text files as well as database file Database file located in following location:
C:\Program Files\AtCor\SphygmoCor CvMS\data Filename: scor.xyz
Simply copy/paste file into a location other than C:\ drive Backup database as frequently as possible Rename database file to date it was backed up
Example: scor4008_5-23-2013.xyz