Heparinized Needles
Heparinized Needles - Related Videos
02:21
Purification of Viral Integrase Using Heparin Affinity Chromatography
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2026
Source: Lopez Jr., M. et al. Detection and Removal of Nuclease Contamination During Purification of Recombinant Prototype Foamy Virus Integrase. J. Vis. Exp. (2017)This video demonstrates the procedure for purifying viral integrase from bacterial nuclease contamination using heparin Sepharose column chromatography followed by SDS-PAGE analysis to confirm protein purity.
10:41
Using a GFP-tagged TMEM184A Construct for Confirmation of Heparin Receptor Identity
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Cited by 2 •
2017
A construct encoding TMEM184A with a GFP tag at the carboxy-terminus designed for eukaryotic expression, was employed in assays designed to confirm the identification of TMEM184A as a heparin receptor in vascular cells.
12:27
Polyelectrolyte Complex for Heparin Binding Domain Osteogenic Growth Factor Delivery
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Cited by 2 •
2016
Self-assembled polyelectrolyte complexes (PEC) fabricated from heparin and protamine were deposited on alginate beads to entrap and regulate the release of osteogenic growth factors. This delivery strategy enables a 20-fold reduction of BMP-2 dose in spinal fusion applications. This article illustrates the benefits and fabrication of PECs.
09:51
Intraosseous Needle Placement
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2023
Source: Julianna Jung, MD, FACEP, Associate Professor of Emergency Medicine, The Johns Hopkins University School of Medicine, Maryland, USA For unstable patients requiring urgent administration of medications, fluids, or blood products, establishing vascular access quickly is essential. However, there are many factors that can complicate placement of a peripheral intravenous cannula (PIV), and it is extremely common for PIV attempts to fail. PIV placement may be technically challenging in small...
01:30
Anticoagulant Drugs: Low-Molecular-Weight Heparins
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2024
Hemostasis is a crucial process that prevents excessive blood loss from damaged blood vessels. It involves various mechanisms such as vasoconstriction, platelet adhesion and activation, and fibrin formation. The importance of each mechanism depends on the type of vessel injury. In contrast, thrombosis is the abnormal formation of a blood clot within the blood vessels, leading to potential complications if the clot obstructs blood flow. Thrombosis can be caused by increased coagulability of the...
FAQs
Heparin enhances the activity of antithrombin, a natural inhibitor of clotting enzymes. This reduces the function of thrombin and factor Xa, which are important for the progression of coagulation and fibrin formation. By limiting these activities during collection, the sample remains available as unclotted whole blood for subsequent biological measurements and cell-based analysis.
The amount of heparin must be controlled because too much can dilute the blood sample and interfere with certain assays. These effects may alter the sample’s composition or complicate interpretation of test results. Using an appropriate concentration helps preserve the intended biological characteristics while maintaining anticoagulant activity sufficient to inhibit fibrin formation.
Maintaining blood in an unclotted state keeps the collected material accessible for analyses that require whole blood rather than a separated or clotted sample. This is especially relevant to blood-gas measurements, hematology, and cell analysis. The approach supports testing in which the cellular and liquid components need to remain available together for examination.
Controlled mixing helps distribute heparin through the collected blood so its anticoagulant effect can act throughout the sample. Inadequate mixing may reduce consistency, while excessive or poorly controlled heparin exposure can contribute to dilution or assay interference. Therefore, concentration and mixing are paired controls for preserving sample quality and producing reliable results.
These needles support collection when an unclotted whole-blood sample is needed for blood-gas measurements, hematology, or cell analysis. They can also be useful in other biological procedures that depend on access to whole blood without fibrin formation. The appropriate application depends on whether clot prevention is compatible with the intended assay or measurement.
Reliability depends on matching heparin use to the analytical purpose and controlling both its concentration and distribution in the sample. Excess anticoagulant may dilute blood or interfere with assays, whereas insufficient control can compromise the unclotted specimen. Careful handling therefore helps preserve samples for consistent biological analysis in research and clinical laboratories.