Hemodynamic Pump
Hemodynamic Pump - Related Videos
01:30
ATP Driven Pumps III: V-type Pumps
0 Views •
2023
V-type pumps are ATP-driven pumps found in the vacuolar membranes of plants, yeast, endosomal and lysosomal membranes of animal cells, plasma membranes of a few specialized eukaryotic cells, and some prokaryotes. They are also known as the V1Vo-ATPase, that couple ATP hydrolysis to transport protons against a concentration gradient. The peripheral or cytosolic V1 domain with eight subunits is involved in ATP hydrolysis. The integral or transmembrane V0 domain containing at least five subunits...
01:34
ATP Driven Pumps II: P-type Pumps
0 Views •
2023
The P-type pumps are a large family of integral membrane transporter ATPases. They are divided into five major types based on substrate specificity, from I to V. A typical P-type pump has three cytosolic domains: nucleotide-binding (N), phosphorylation (P), and activator (A) domains. These domains are connected to the membrane-spanning helices by short amino acid segments. ATP hydrolysis and covalent phosphoenzyme intermediate formation are crucial parts of the catalytic cycle. At the highly...
08:09
A Novel Ex Ovo Banding Technique to Alter Intracardiac Hemodynamics in an Embryonic Chicken System
0 Views •
Cited by 2 •
2016
For the first time we present here a reproducible banding procedure to alter hemodynamics in the developing heart ex ovo. This is achieved by partially constricting the outflow tract (OFT).
06:38
Early Detection of Drug-Induced Renal Hemodynamic Dysfunction Using Sonographic Technology in Rats
0 Views •
Cited by 14 •
2016
Early stage hemodynamic dysfunction is critical to the development of kidney disease. Yet, detection methodologies are limited. Recent advances in sonography provide a noninvasive, accurate option for early detection of kidney injury. This study outlines a step-by-step, sonographic methodology for detecting kidney dysfunction using a drug-induced nephrotoxicity rat model.
01:13
Pumped Concrete
0 Views •
2024
Concrete in large quantities can be pumped across long distances for placing in inaccessible sites. This system comprises a hopper that receives concrete from a mixer, a pump to propel the concrete, and pipelines that facilitate its delivery. For direct-acting pumps, the concrete enters the pump via the inlet valve under the action of gravity and suction created by the movement of the piston. This concrete is then forced into the pipeline and out through the outlet valve by the forward movement...
FAQs
Mechanical energy drives rotating or reciprocating components, which transfer energy to blood and produce fluid motion. Adjusting the pump’s operation changes the resulting flow rate and pressure, allowing circulation to be regulated rather than merely generated. This pressure-gradient mechanism is central to maintaining adequate perfusion when the heart or vascular system cannot do so independently.
Rotating and reciprocating components provide different mechanical approaches for converting energy into blood motion. The selected configuration influences how the device generates flow and pressure, as well as how designers evaluate performance and blood compatibility. Comparing these mechanisms helps bioengineers match pump behavior to applications requiring temporary or longer-term circulatory support.
Flow rate, pressure control, and shear stress are key design variables. Flow rate and pressure determine whether the device can provide the intended circulatory support, while shear stress is important because the blood is exposed to mechanical forces within the pump. Balancing these factors helps bioengineers improve performance while addressing blood compatibility.
Shear stress describes a mechanical condition produced as blood moves through the device and interacts with its components. It must be considered alongside flow rate and pressure control because these factors jointly influence blood compatibility and overall performance. Evaluating shear stress therefore helps guide designs intended to support circulation more safely and effectively.
In ventricular assist devices, the pump provides circulatory support when the heart cannot maintain adequate perfusion. Its ability to regulate blood flow and pressure makes it relevant to systems designed for temporary or long-term assistance. Bioengineering development focuses on improving this support while preserving blood compatibility and achieving performance appropriate for the intended duration.
These pumps support blood movement outside the body in cardiopulmonary bypass and other extracorporeal circulation applications. Their mechanical energy conversion maintains controlled flow and pressure while circulation is managed by an external system. Design priorities include regulating the desired hemodynamic conditions and limiting compatibility concerns associated with exposing blood to pump components.
Laboratory models use these devices to reproduce controlled blood-flow and pressure conditions for studying cardiovascular behavior and device performance. Because engineers can regulate the pump-generated flow and pressure, the models provide a setting for examining how design factors affect circulation. This supports evaluation and refinement before applying concepts to circulatory-support systems.
Bioengineering connects mechanical design with physiological requirements by evaluating pressure generation, flow regulation, shear stress, and blood compatibility together. This approach supports the development of devices for both temporary and long-term circulatory assistance. It also helps improve how pumps respond to the demands of ventricular support, extracorporeal circulation, and cardiovascular laboratory models.