Published Studies Related to Definity (Perflutren)
A pilot randomized clinical safety study of sonothrombolysis augmentation with ultrasound-activated perflutren-lipid microspheres for acute ischemic stroke. [2008.05]
BACKGROUND AND PURPOSE: Ultrasound transiently expands perflutren-lipid microspheres (muS), transmitting energy momentum to surrounding fluids. We report a pilot safety/feasibility study of ultrasound-activated muS with systemic tissue plasminogen activator (tPA)... CONCLUSIONS: Perflutren microS reached and permeated beyond intracranial occlusions with no increase in sICH after systemic thrombolysis suggesting feasibility of further microS dose-escalation studies and development of drug delivery to tissues with compromised perfusion.
Sudden death after intravenous administration of a perflutren contrast agent: a case of pseudocomplication? [2009.06]
Perflutren cardiac ultrasound agents improve diagnostic accuracy in patients whose imaging is technically difficult. This report describes a case of sudden death approximately 5 minutes after the intravenous administration of 0.5 mL of perflutren contrast agent (Definity) during transthoracic echocardiography with suboptimal baseline images performed 10 days after coronary artery bypass graft surgery because of hypotension and tachycardia in a 73-year-old patient with severe left ventricular systolic dysfunction.
Acoustic and kinetic behaviour of definity in mice exposed to high frequency ultrasound. [2009.02]
Microbubble contrast agents have shown clinical potential for characterising blood flow using 1 to 10 MHz ultrasound; however, scaling their use for similar applications in the mouse with high frequency ultrasound (20 to 60 MHz) has not been addressed... These results suggest that quantitative contrast flow studies in the mouse using high frequency ultrasound are possible for doses between 10 and 60 microL kg(-1).
The safety of deFinity and Optison for ultrasound image enhancement: a retrospective analysis of 78,383 administered contrast doses. [2008.11]
BACKGROUND: The purpose of this retrospective analysis was to define the incidence of severe adverse events after exposure to ultrasound contrast agents... CONCLUSION: This multicenter, retrospective analysis includes the largest number of doses of ultrasound contrast agents ever published and a large number of patients evaluated in a wide variety of settings, including the critically ill. It shows that these agents have a good safety profile in both cardiac and abdominal ultrasound applications. The incidence of severe adverse reactions to ultrasound contrast agents is no greater, and may be lower, than that reported for contrast agents commonly used in other cardiac imaging tests.
Ultrasound-enhanced thrombolysis using Definity as a cavitation nucleation agent. [2008.09]
Ultrasound has been shown previously to act synergistically with a thrombolytic agent, such as recombinant tissue plasminogen activator (rt-PA) to accelerate thrombolysis. In this in vitro study, a commercial contrast agent, Definity, was used to promote and sustain the nucleation of cavitation during pulsed ultrasound exposure at 120 kHz...
Clinical Trials Related to Definity (Perflutren)
Evaluation of Intra-operative Ultrasound Contrast Enhancement in the Evaluation of Liver Tumors [Recruiting]
The primary purpose of this study is to demonstrate the safety and effectiveness of using an
intra-operative ultrasound contrast agent(Definity«) for the identification of known liver
A Study of Commercial DEFINITY« to Monitor the Effects of the Heart's Pulmonary Artery Pressure [Recruiting]
The purpose of this clinical research is to learn if DEFINITY« 416 will cause any adverse
effects during Right Heart Catheterization. This research was requested by the FDA.
Utilization of Diagnostic Ultrasound in the Detection and Therapy of Acute Coronary Syndromes [Not yet recruiting]
The study will see if mechanical impulses delivered by an echocardiographic probe during a
continuous infusion of Definity are capable of improving blood flow in smaller heart vessels
in patients with acute coronary syndromes.
Breast VCEUS to Evaluate Early Response to Neoadjuvant Chemotherapy [Recruiting]
1. Evaluate quantitative VCEUS imaging for determining early breast cancer response to
neoadjuvant chemotherapy and compare results to co-temporal volume change on grayscale
ultrasound and post-treatment mammography findings utilizing final surgical pathology
and clinical outcome.
2. Assess incremental benefit of quantitative VCEUS to planar CEUS tumor perfusion
measurements and enhancement patterns in predicting tumor response to adjuvant
treatment in clinical studies.
The contrast agent Definity┬« is FDA approved for use as a contrast agent during ultrasound
(echocardiography) of the heart. Definity┬« will be used "off-label" (during ultrasound of
the breast) in this study. The administration of Definity┬« during this study will follow
total dose guidelines approved by the FDA.
Definity for Ultrasound of Intraocular Tumors [Recruiting]
The hypothesis is that microbubbles may be used as a contrast agent to help image tumors in
the eye. In this study, patients with eye melanoma who are going to have their eye removed,
will have their eye imaged by ultrasound (sound waves) before and after intravenous
injection of microbubbles. The pathology characteristics of the tumor in the removed eye
will be compared with the images.
Reports of Suspected Definity (Perflutren) Side Effects
Back Pain (6),
Atrial Fibrillation (4),
Unresponsive TO Stimuli (3),
Ejection Fraction Decreased (3),
Viith Nerve Paralysis (2),
Fatigue (2), more >>