New Method for Evaluating the Visibility of Coronary Stents

Dobránszky, János; Ring, György; Bognár, Eszter; Kovács, Róbert; Bitay, Enikő

doi:10.12700/aph.11.05.2014.05.5

Cited by 2 publications

(2 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Many studies have focused to enhance their mechanical performance, regulate degradation rate, and improve bioactivities by using reinforced particles and/or surface modifications 12 . On the other hand, limited works were carried out to improve X‐ray visibility, where researchers mainly focused on blending/coating/attaching the permanent markers (PM) like Pt, Au, Ta, or their alloy/oxides on the BPS 13‐15 . As a consequence, during In‐vivo degradation, the PM may leach/break/flake out from the BPS, causing toxicity or blockage of arteries 5,16,17 …”

Section: Introductionmentioning

confidence: 99%

“…12 On the other hand, limited works were carried out to improve X-ray visibility, where researchers mainly focused on blending/coating/attaching the permanent markers (PM) like Pt, Au, Ta, or their alloy/oxides on the BPS. [13][14][15] As a consequence, during In-vivo degradation, the PM may leach/break/flake out from the BPS, causing toxicity or blockage of arteries. 5,16,17 Thus, to overcome the abovementioned limitation, the author's previous work was focused on developing a novel BRM that enhances the radiopacity and mechanical performance of the bioresorbable polymer.…”

mentioning

confidence: 99%

See 1 more Smart Citation

Fabrication and characterization of PLLA/PCL/Mg‐Zn‐Y alloy composite stent

Srivastava,

Singh,

Agrawal

et al. 2023

Polymer Engineering & Sci

View full text Add to dashboard Cite

Bioresorbable polymeric stents (BPS) can become a promising alternative over permanent stents, as it reduce in‐stent thrombosis, endothelial dysfunction, and thrombogenicity. Although, a few limitations like uncontrolled degradation, inadequate strength, and lack of radiopacity restrict its application. Thus, a novel bioresorbable radiopaque Mg‐Zn‐Y Alloy (BRM) of high effective atomic number (Zeff) was developed to reinforce and attenuate X‐rays in the polymers. After that, the optimized BRM microparticles were blended with radiolucent poly (L‐lactide)/poly (ε‐caprolactone) (PLLA/PCL) polymer and extruded into biaxially expanded (BAE) tubes. Further, in this work, BAE tubes of PLLA/PCL/BRM and PLLA/PCL were cut using the optimized Femtosecond laser machine (FSLM) parameters for fabricating cardiovascular stents. These stent materials were assessed to sustain the angioplasty procedure, such as radial strength, crimping, recoil, expansion process, and performance under cycling loading.Highlights A novel biodegradable radiopaque Mg‐Zn‐Y alloy was developed. Adding Mg alloy (5% wt.) in PLLA/PCL imparts X‐ray visibility. Composite stents show better compressive radial strength and flexibility. It also reveals low crimping recoil, expansion recoil, and foreshortening. Composite stents can withstand arterial vasomotion better than PLLA/PCL.

show abstract

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

Fabrication and characterization of PLLA/PCL/Mg‐Zn‐Y alloy composite stent

Srivastava,

Singh,

Agrawal

et al. 2023

Polymer Engineering & Sci

View full text Add to dashboard Cite

show abstract

Radiopacity assessment of neurovascular implants

Hoffmann

Gugel

Beuing

et al. 2016

Current Directions in Biomedical Engineering

View full text Add to dashboard Cite

An experimental method for radiopacity evaluation of neurovascular implants is presented. State of the art methods are described for cardiovasular implants. To extend the methods to neurovascular devices, imaging parameters were determined from clinical radiography data sets and protocols. To reduce background noise, a thresholding method is introduced. This method is evaluated on a setup with four different laser cut and braided stents. The results are compared to current evaluation methods without filtering. It is shown that unfiltered methods underestimate the radiopacity by 0.89 mm ± 0.21 mm (aluminum equivalent). The introduced method is highly repeatable and uses modern clinical imaging technology. Thus an image evaluation under realisitc conditions is possible. Slightly visible vascular devices and implants can be compared with high accuracy.

show abstract

New Method for Evaluating the Visibility of Coronary Stents

Abstract: In invasive radiology, X-ray imaging is used in both tracking

Cited by 2 publications

References 38 publications

Fabrication and characterization of PLLA/PCL/Mg‐Zn‐Y alloy composite stent

Fabrication and characterization of PLLA/PCL/Mg‐Zn‐Y alloy composite stent

Radiopacity assessment of neurovascular implants

Contact Info

Product

Resources

About