Physical Barrier Insertion

Physical barrier insertion is the placement of a material or structure between biological compartments to control contact, movement, or exchange, making it useful for separating tissues, cells, or experimental environments. Its effects depend on the barrier’s position, thickness, and permeability: an impermeable barrier blocks direct passage, whereas a selectively permeable material can restrict cell migration while allowing limited diffusion of fluids or molecules. In biology, this approach supports compartmentalized cell culture, tissue engineering, wound-healing studies, and investigations of transport across tissue interfaces. By controlling the local physical environment, researchers can isolate interactions, model biological boundaries, and evaluate how cells respond to spatial constraints.

Physical Barrier Insertion - Related Videos

Education

JoVE Science Education - Clinical Skills

Peripheral Intravenous Catheter Insertion

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2023

Source: Madeline Lassche, MSNEd, RN and Katie Baraki, MSN, RN, College of Nursing, University of Utah, UT The purpose of peripheral intravenous catheter (PIV) insertion is to infuse medications, perform intravenous (IV) fluid therapy, or inject radioactive tracers for special examination procedures. Placing a PIV is an invasive procedure and requires the use of an aseptic, no-touch technique. Common IV venipuncture sites are the arms and hands in adults and the feet in children. According to...

Central Venous Catheter Insertion: Subclavian Vein

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2023

Source: James W Bonz, MD, Emergency Medicine, Yale School of Medicine, New Haven, Connecticut, USA Central venous access is necessary in a multitude of clinical situations for hemodynamic monitoring, medication delivery, and blood sampling. There are three veins in the body that are accessed for central venous cannulation: the internal jugular, the subclavian, and the femoral vein. Central venous access via the subclavian vein has several advantages over other possible locations. The subclavian...

Research

JoVE Journal - Bioengineering

Sensing of Barrier Tissue Disruption with an Organic Electrochemical Transistor

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Cited by 5 •

2014

The Organic Electrochemical Transistor is integrated with live cells and used to monitor ion flux across the gastrointestinal epithelial barrier. In this study, an increase in ion flux, related to disruption of tight junctions, induced by the presence of the calcium chelator EGTA (ethylene glycol-bis(beta-aminoethyl ether)-N,N,N',N'-tetra acetic acid), is measured.

General Approach to the Physical Exam

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2023

Source: Jaideep S. Talwalkar, MD, Internal Medicine and Pediatrics, Yale School of Medicine, New Haven, CT The examination of the body is fundamental to the practice of medicine. Since the Roman Empire, physicians have described the connection between alterations in function of specific parts of the body and specific disease states and have sought to further scientific understanding to improve bedside diagnosis. However, in this modern age of increasing technology within medical diagnostics, it...

Blood-Brain Tumor Barrier or BBTB Model: An Adaption of the Blood-Brain Barrier or BBB Model to Evaluate Delivery of Therapeutics to the Tumor

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2023

In this video, we describe a comprehensive protocol to establish an in vitro model mimicking the blood-brain tumor barrier. The model holds promise to understand the delivery of therapeutic agents for the treatment of brain tumors.

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