Ms. Emily Budziszewski Profile

Emily Budziszewski

SPIE Involvement:

Author

Publications (1)

This will count as one of your downloads.

You will have access to both the presentation and article (if available).

DOWNLOAD NOW

This content is available for download via your institution's subscription. To access this item, please sign in to your personal account.

Email or Username Forgot your username?

Password Forgot your password?

Show

Keep me signed in

No SPIE account? Create an account

Proceedings Article | 19 February 2020 Presentation + Paper

Dye diffusion proximal to in situ forming implants is increased by ultrasound stimulation

Elizabeth S. Berndl, Emily Budziszewski, Selva Jeganathan, Agata Exner, Michael Kolios

Proceedings Volume 11219, 112190L (2020) https://doi.org/10.1117/12.2547061

KEYWORDS: Diffusion, Ultrasonography, Polymerization, Calibration, Transducers, Tumors, Molecules, Biomedical engineering

Read Abstract +

Chemotherapeutics are generally delivered systemically, causing damage to rapidly dividing cells and leading to a compromised immune system, nausea, fatigue, and hair loss. In situ forming implants (ISFIs) are biocompatible drug delivery vehicles which are injected as a liquid, undergo phase inversion during drug delivery, and ultimately breakdown, thereby allowing for localized release of drugs, potentially reducing side effects of chemotherapeutics.

Previous experiments in our lab have shown that applying one-time ultrasound to ISFIs loaded with chemotherapeutics, shortly after injection, the 8-day release of doxorubicin can increase from 60% to 95% in vivo. To separate the effects of sonication on the effective drug diffusion rate from those related to how the US exposure may change the phase inversion kinetics and drug release, ISFIs and reservoirs of Janus Green B dye, located approximately 6 mm apart, were embedded in a polyacrylamide phantom. ISFIs were stimulated with a 1 MHz focused transducer with either no, mild (10 min, 10% duty), or intense (5 min, 33% duty) sonication, and phantoms were imaged to determine diffusion rates.

The relative diffusion area and dye diffusion rate were analysed as a function of time, regions enclosed by a thresholding contour line and sonication type. Compared to the no sonication control, the effects of mild sonication were variable, with relative area increasing in low concentration contours and decreasing at high concentration contours (p = 0.0002). Intense sonication, compared to no sonication, had increased dye diffusion rate (p= 0.014), and a decrease in the relative area at early time points, and an increase at later time points (p = 0.041).

The results suggest that high intensity ultrasound exposure on a nearby object can cause changes to the diffusion of molecules located in the proximity of the object.

My Library

You currently do not have any folders to save your paper to! Create a new folder below.

Folder Name

Folder Description

View contact details

UPDATE YOUR PROFILE

Is this your profile? Update it now.

Sign into your SPIE.org account

Don’t have a profile and want one?

Create an account on SPIE.org

Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks. You are receiving this notice because your organization may not have SPIE eBooks access.*

*Shibboleth/Open Athens users─please sign in to access your institution's subscriptions.

To obtain this item, you may purchase the complete book in print or electronic format on SPIE.org.

ORGANIZATIONAL
Sign in with credentials provided by your organization.

Organizational Username

Organizational Password

Show/Hide Password

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members:

Non-members: ADD TO CART

Keywords/Phrases

Search In:

Publication Years