Deep Venous System
Deep Venous System - Related Videos
06:45
Point-Of-Care Ultrasound Screening for Proximal Lower Extremity Deep Venous Thrombosis
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Cited by 4 •
2023
Traditionally, lower extremity deep venous thrombosis (DVT) is diagnosed by radiology-performed venous duplex ultrasound. Providers appropriately trained in focused point-of-care ultrasound (POCUS) can perform a rapid bedside examination with high sensitivity and specificity in critically ill patients. We describe the scanning technique for focused POCUS DVT lower extremity examination.
08:14
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...
11:39
Central Venous Catheter Insertion: Internal Jugular
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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, including vascular access, vasopressor and caustic medication delivery, central venous pressure monitoring, intravascular device delivery (pacing wires, Swann-Ganz catheters), volume resuscitation, total parental nutrition, hemodialysis, and frequent phlebotomy. Safe reliable placement of a central venous catheter (CVC) in...
10:45
Central Venous Catheter Insertion: Femoral Vein
0 Views •
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, including vascular access, vasopressor and caustic medication delivery, central venous pressure monitoring, volume resuscitation, total parental nutrition, hemodialysis, and frequent phlebotomy. There are three veins in the body that are accessed for central venous cannulation: the internal jugular, the subclavian, and the...
06:03
Electrolytic Inferior Vena Cava Model (EIM) of Venous Thrombosis
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Cited by 39 •
2011
The electrolytic induction of endothelial activation to the internal surface of the Inferior Vena Cava results in venous type thrombus formation due to endothelial activation and partial blood stasis, two components of Virchow's triad.
FAQs
Forward movement depends on several coordinated mechanisms rather than a single force. One-way valves limit backward flow, while contractions of surrounding skeletal muscles compress deep veins and push blood onward. Respiratory pressure changes provide an additional pressure gradient that supports movement toward the heart, particularly when venous blood must travel against gravity from the limbs.
The close association between deep veins and arteries is an important anatomical feature of venous circulation. It places the returning vessels within the same deep tissue pathways as major arterial vessels, while surrounding muscles can assist venous compression. Recognizing these paired pathways helps students trace blood movement through the limbs and relate vessel arrangement to circulation.
Perforating veins connect the deep and superficial venous systems, allowing venous blood to move between these two networks. Their connections help distribute flow and support efficient drainage from the limbs. Studying these vessels adds an important layer to venous anatomy because circulation is not organized as two completely separate systems.
Blood returning from the limbs must travel toward the heart despite gravitational force, so passive flow alone is insufficient. One-way valves help prevent reversal, and skeletal muscle contraction adds a pumping action around the veins. Respiratory pressure changes further support the upward movement, making coordinated mechanical assistance essential for effective return.
A useful approach is to trace the system from deep tissues toward the heart, identify veins that accompany arteries, and follow the connections formed by perforating veins. Students can then relate valves, respiratory pressure changes, and skeletal muscle contractions to the direction of flow. This integrates anatomy with the broader principles of circulation and tissue drainage.
Its role becomes especially clear when a clot obstructs venous flow within a deep vessel. The obstruction interferes with the normal return of deoxygenated blood from tissues and provides a concrete example of how vessel blockage can disrupt circulation. Linking the anatomy to this condition helps explain why deep venous pathways are medically and biologically significant.