AI Article Synopsis
Article Abstract
Background: The paradigm for donation after cardiac death subjects donor organs to ischemic injury. A dual-chamber organ perfusion stent would maintain organ perfusion without affecting natural cardiac death. A center lumen allows uninterrupted cardiac blood flow, while an external chamber delivers oxygenated blood to the visceral vessels.
Methods: A prototype organ perfusion stent was constructed from commercial stents. In a porcine model, the organ perfusion stent was deployed, followed by a simulated agonal period. Oxygenated blood perfused the external stent chamber. Organ perfusion was compared between controls (n = 3) and organ perfusion stent (n = 6). Finally, a custom, nitinol, dual chamber organ perfusion stent was fabricated using a retrievable "petal and stem" design.
Results: Endovascular organ perfusion stent deployment achieved visceral isolation without adverse impact on cardiac parameters. Visceral oxygen delivery was 4.8-fold greater compared with controls. During the agonal period, organs in organ perfusion stent-treated animals appeared well perfused in contrast with the malperfused controls. A custom nitinol and polyurethane organ perfusion stent was recaptured easily with simple sheath advancement.
Conclusion: An organ perfusion stent maintained organ perfusion during the agonal phase in a porcine model of donation after cardiac death organ donation without adversely affecting cardiac function. Ultimately, the custom retrievable design of this study may help resolve the critical shortage of donor organs for transplant.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5021586 | PMC |
| http://dx.doi.org/10.1016/j.surg.2016.06.039 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
A preclinical study of allogeneic CD19 chimeric antigen receptor double-negative T cells as an off-the-shelf immunotherapy drug against B-cell malignancies.
Clin Transl Immunology
December 2024
Wyze Biotech Co. Ltd Zhongshan Guangdong China.
Objectives: To evaluate the manufacturability, efficacy and safety of allogeneic CD19 chimeric antigen receptor double-negative T cells (CD19-CAR-DNTs) as an off-the-shelf therapeutic cell product.
Methods: A membrane proteome array was used to assess the off-target binding of CD19-CAR. DNTs derived from healthy donors were transduced with lentiviral vectors encoding the CD19-CAR.
Donor-derived carbapenem-resistant Klebsiella Pneumoniae infections leading to retroperitoneal abscesses in kidney transplant recipients: a report of two cases.
BMC Infect Dis
December 2024
Department of Urology, 900th Hospital of Joint Logistics Support Force, Fuzong Clinical Medical College of Fujian Medical University, Fuzhou, 350025, China.
Background: Retroperitoneal abscesses caused by donor-derived Carbapenem-Resistant Klebsiella Pneumoniae (CRKP) infections are rare and often challenging to diagnose early due to a lack of specific symptoms.
Case Presentation: In case one, a 64-year-old male presented with unexplained fever and emaciation three months after undergoing a kidney transplant for end-stage renal disease. Metagenomic Next-Generation Sequencing identified CRKP in peripheral blood samples, and CT scans confirmed a retroperitoneal abscess.
SARS-CoV-2 Spike S1 subunit triggers pericyte and microvascular dysfunction in human pancreatic islets.
Diabetes
December 2024
Division of Endocrinology, Diabetes and Metabolism, Department of Medicine, University of Miami Miller School of Medicine.
The COVID-19 pandemic has profoundly affected human health, yet the mechanisms underlying its impact on metabolic and vascular systems remain incompletely understood. Clinical evidence suggests that SARS-CoV-2 directly disrupts vascular homeostasis, with perfusion abnormalities observed in various tissues. The pancreatic islet, a key endocrine mini-organ reliant on its microvasculature for optimal function, may be particularly vulnerable.
View Article and Find Full Text PDFConsidering future qualification for regulatory science in the early development of microphysiological systems: a case study of microthrombosis in a Vessel-on-Chip.
Front Toxicol
December 2024
Bioengineering Technologies, University of Twente, Enschede, Netherlands.
Microphysiological systems (MPS) and Organs-on-Chips (OoCs) hold significant potential for replicating complex human biological processes . However, their widespread adoption by industry and regulatory bodies depends on effective qualification to demonstrate that these models are fit for purpose. Many models developed in academia are not initially designed with qualification in mind, which limits their future implementation in end-user settings.
View Article and Find Full Text PDFAdaptable Manufacturing and Biofabrication of Milliscale Organ Chips With Perfusable Vascular Beds.
Biotechnol J
December 2024
Department of Biomedical Engineering, Tulane University, New Orleans, USA.
Microphysiological systems (MPS) containing perfusable vascular beds unlock the ability to model tissue-scale elements of vascular physiology and disease in vitro. Access to inexpensive stereolithography (SLA) 3D printers now enables benchtop fabrication of polydimethylsiloxane (PDMS) organ chips, eliminating the need for cleanroom access and microfabrication expertise, and can facilitate broader adoption of MPS approaches in preclinical research. Rapid prototyping of organ chip mold designs accelerates the processes of design, testing, and iteration, but geometric distortion and surface roughness of SLA resin prints can impede the development of standardizable manufacturing workflows.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!