Joseph K. Eibl
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View article: The feasibility of monitoring trauma patients with a wireless, wearable Doppler ultrasound
The feasibility of monitoring trauma patients with a wireless, wearable Doppler ultrasound Open
Background Early detection of reduced stroke volume (SV) or cardiac output (CO) may expedite resuscitative interventions during traumatic hemorrhage; corrected carotid artery flow time (ccFT) has been proposed as a surrogate for SV during …
View article: Defining the physiological bounds of left ventricular ejection time with a wireless, wearable ultrasound: An analysis of over 137,000 cardiac cycles
Defining the physiological bounds of left ventricular ejection time with a wireless, wearable ultrasound: An analysis of over 137,000 cardiac cycles Open
Background Flow time (FT) or the left ventricular ejection time (LVET) is the duration of mechanical systole, when the aortic valve is open and ejecting blood. LVET can be measured in the common carotid artery from the time of the systolic…
View article: A Wireless, Wearable Ultrasound for Assessing Left Ventricular Assist Device Hemodynamics: A Case Series
A Wireless, Wearable Ultrasound for Assessing Left Ventricular Assist Device Hemodynamics: A Case Series Open
Optimizing left ventricular assist device (LVAD)–patient interaction is important. This is typically accomplished via an outpatient ramp test, monitored by echocardiography and/or invasive measures. We have developed a wireless, wearable D…
View article: Hemodynamic Insights From Simultaneous Common Carotid and Internal Jugular Doppler Ultrasonography in a Patient With Hypoxemia and Multiple Organ Dysfunction
Hemodynamic Insights From Simultaneous Common Carotid and Internal Jugular Doppler Ultrasonography in a Patient With Hypoxemia and Multiple Organ Dysfunction Open
A 68-year-old man was admitted to the ICU for shock, acute kidney injury that required continuous venovenous hemofiltration (CVVH), and hypoxemia after right-sided chest tube placement for unilateral hydrothorax. His medical history was no…
View article: The correlation between carotid artery doppler and stroke volume during central blood volume loss and resuscitation
The correlation between carotid artery doppler and stroke volume during central blood volume loss and resuscitation Open
Background: Using peripheral arteries to infer central hemodynamics is common among hemodynamic monitors. Doppler ultrasound of the common carotid artery has been used in this manner with conflicting results. The aim of this study was to i…
View article: Simultaneous Venous-Arterial Doppler Ultrasound During Early Fluid Resuscitation to Characterize a Novel Doppler Starling Curve: A Prospective Observational Pilot Study
Simultaneous Venous-Arterial Doppler Ultrasound During Early Fluid Resuscitation to Characterize a Novel Doppler Starling Curve: A Prospective Observational Pilot Study Open
Background: The likelihood of a patient being preload responsive—a state where the cardiac output or stroke volume (SV) increases significantly in response to preload—depends on both cardiac filling and function. This relationship is descr…
View article: Inferior Vena Caval Measures Do Not Correlate with Carotid Artery Corrected Flow Time Change Measured Using a Wireless Doppler Patch in Healthy Volunteers
Inferior Vena Caval Measures Do Not Correlate with Carotid Artery Corrected Flow Time Change Measured Using a Wireless Doppler Patch in Healthy Volunteers Open
(1) Background: The inspiratory collapse of the inferior vena cava (IVC), a non-invasive surrogate for right atrial pressure, is often used to predict whether a patient will augment stroke volume (SV) in response to a preload challenge. Th…
View article: The Correlation between Carotid Artery Corrected Flow Time and Velocity Time Integral during Central Blood Volume Loss and Resuscitation
The Correlation between Carotid Artery Corrected Flow Time and Velocity Time Integral during Central Blood Volume Loss and Resuscitation Open
Background: Doppler ultrasound of the common carotid artery is used to infer central hemodynamics. For example, change in the common carotid artery corrected flow time (ccFT) and velocity time integral (VTI) are proposed surrogates of chan…
View article: Simultaneous venous–arterial Doppler during preload augmentation: illustrating the Doppler Starling curve
Simultaneous venous–arterial Doppler during preload augmentation: illustrating the Doppler Starling curve Open
Providing intravenous (IV) fluids to a patient with signs or symptoms of hypoperfusion is common. However, evaluating the IV fluid ‘dose–response’ curve of the heart is elusive. Two patients were studied in the emergency department with a …
View article: Building an inpatient addiction medicine consult service in Sudbury, Canada: preliminary data and lessons learned in the era of COVID-19
Building an inpatient addiction medicine consult service in Sudbury, Canada: preliminary data and lessons learned in the era of COVID-19 Open
Objective The goal of this study was to (1) Describe the patient population of a newly implemented addiction medicine consult service (AMCS); (2) Evaluate referrals to community-based addiction support services and acute health service use…
View article: Carotid Artery Corrected Flow Time Measured by Wearable Doppler Ultrasound Accurately Detects Changing Stroke Volume During the Passive Leg Raise in Ambulatory Volunteers
Carotid Artery Corrected Flow Time Measured by Wearable Doppler Ultrasound Accurately Detects Changing Stroke Volume During the Passive Leg Raise in Ambulatory Volunteers Open
Background: The change in the corrected flow time of the common carotid artery (ccFTΔ) has been used as a surrogate of changing stroke volume (SVΔ) in the critically-ill. Thus, this relatively easy-to-obtain Doppler measure may help clinic…
View article: Detecting the Change in Total Circulatory Flow with a Wireless, Wearable Doppler Ultrasound Patch: A Pilot Study
Detecting the Change in Total Circulatory Flow with a Wireless, Wearable Doppler Ultrasound Patch: A Pilot Study Open
OBJECTIVE: Measuring fluid responsiveness is important in the management of critically ill patients, with a 10–15% change in cardiac output typically being used to indicate “fluid responsiveness.” Ideally, these changes would be measured n…
View article: A Novel Spectral Index for Tracking Preload Change from a Wireless, Wearable Doppler Ultrasound
A Novel Spectral Index for Tracking Preload Change from a Wireless, Wearable Doppler Ultrasound Open
A wireless, wearable Doppler ultrasound offers a new paradigm for linking physiology to resuscitation medicine. To this end, the image analysis of simultaneously-acquired venous and arterial Doppler spectrograms attained by wearable ultras…
View article: Building an inpatient addiction medicine consult service in Sudbury, Canada: preliminary data and lessons learned in the era of COVID-19
Building an inpatient addiction medicine consult service in Sudbury, Canada: preliminary data and lessons learned in the era of COVID-19 Open
Objective: The goal of this study was to 1) Describe the patient population of a newly implemented addiction medicine consult service (AMCS); 2) Evaluate referrals to community-based addiction support services and acute health service use,…
View article: Continuous Venous-Arterial Doppler Ultrasound During a Preload Challenge
Continuous Venous-Arterial Doppler Ultrasound During a Preload Challenge Open
A preload challenge (PC) is a clinical maneuver that, first, increases the cardiac filling (i.e., preload) and, second, calculates the change in cardiac output. Fundamentally, a PC is a bedside approach for testing the Frank-Starling-Sarno…
View article: Additional file 1 of Building an inpatient addiction medicine consult service in Sudbury, Canada: preliminary data and lessons learned in the era of COVID-19
Additional file 1 of Building an inpatient addiction medicine consult service in Sudbury, Canada: preliminary data and lessons learned in the era of COVID-19 Open
Supplementary Material 1
View article: Implementation and evaluation of a two-eyed seeing approach using traditional healing and seeking safety in an indigenous residential treatment program in Northern Ontario
Implementation and evaluation of a two-eyed seeing approach using traditional healing and seeking safety in an indigenous residential treatment program in Northern Ontario Open
Indigenous clients in need of residential care for substance use disorders (SUD) often present with the diagnosis of substance use disorder (SUD) combined with intergenerational trauma (IGT) or both. SUD is exceedingly prevalent amongst In…
View article: Evaluating Patient Satisfaction and Qualitative Outcomes during an Abstinence-Based Indigenous Residential Treatment Program in Northern Ontario
Evaluating Patient Satisfaction and Qualitative Outcomes during an Abstinence-Based Indigenous Residential Treatment Program in Northern Ontario Open
Background: Indigenous peoples with substance use disorders (SUD) and intergenerational trauma (IGT) have a variety of needs across the range of symptom severity and the challenging dual disorder (1). To address these needs, a continuum of…
View article: A wireless ultrasound patch detects mild-to-moderate central hypovolemia during lower body negative pressure
A wireless ultrasound patch detects mild-to-moderate central hypovolemia during lower body negative pressure Open
BACKGROUND We have developed a wireless, wearable Doppler ultrasound system that continuously measures the common carotid artery Doppler pulse. A novel measure from this device, the Doppler shock index, accurately detected moderate-to-seve…
View article: Temporal concordance between pulse contour analysis, bioreactance and carotid doppler during rapid preload changes
Temporal concordance between pulse contour analysis, bioreactance and carotid doppler during rapid preload changes Open
Purpose We describe the temporal concordance of 3 hemodynamic monitors. Materials and methods Healthy volunteers performed preload changes while simultaneously wearing a non-invasive, pulse-contour stroke volume (SV) monitor, a bioreactanc…
View article: Carotid artery velocity time integral and corrected flow time measured by a wearable Doppler ultrasound detect stroke volume rise from simulated hemorrhage to transfusion
Carotid artery velocity time integral and corrected flow time measured by a wearable Doppler ultrasound detect stroke volume rise from simulated hemorrhage to transfusion Open
Objective Doppler ultrasonography of the common carotid artery is used to infer stroke volume change and a wearable Doppler ultrasound has been designed to improve this workflow. Previously, in a human model of hemorrhage and resuscitation…
View article: A Wireless Wearable Doppler Ultrasound Detects Changing Stroke Volume: Proof-of-Principle Comparison with Trans-Esophageal Echocardiography during Coronary Bypass Surgery
A Wireless Wearable Doppler Ultrasound Detects Changing Stroke Volume: Proof-of-Principle Comparison with Trans-Esophageal Echocardiography during Coronary Bypass Surgery Open
Background: A novel, wireless, ultrasound biosensor that adheres to the neck and measures real-time Doppler of the carotid artery may be a useful functional hemodynamic monitor. A unique experimental set-up during elective coronary artery …
View article: The Doppler shock index measured by a wearable ultrasound patch accurately detects moderate‐to‐severe central hypovolemia during lower body negative pressure
The Doppler shock index measured by a wearable ultrasound patch accurately detects moderate‐to‐severe central hypovolemia during lower body negative pressure Open
In a human model of hemorrhage and resuscitation, measures from a wearable Doppler ultrasound patch correlated strongly with SV and identified moderate-to-severe central hypovolemia with excellent diagnostic accuracy.
View article: Carotid Doppler Measurement Variability in Functional Hemodynamic Monitoring: An Analysis of 17,822 Cardiac Cycles
Carotid Doppler Measurement Variability in Functional Hemodynamic Monitoring: An Analysis of 17,822 Cardiac Cycles Open
OBJECTIVES: Carotid Doppler ultrasound is used as a measure of fluid responsiveness, however, assessing change with statistical confidence requires an adequate beat sample size. The coefficient of variation helps quantify the number of car…