Upper Extremity Veins Study Guide

Vocabulary flashcards generated from upper extremity venous pathology lecture notes covering superficial thrombophlebitis, Paget-Schroetter syndrome, SVC syndrome, Virchow's triad, catheter types, and duplex examination techniques.

Thrombus Organization and Fibrosis

Over time, thrombus organizes and fibroses, firmly attached, while the vessel wall thickens and collaterals form to reroute flow around it.

Superficial Thrombophlebitis Mechanical Triggers

Repeated venipuncture and IV placement cause direct mechanical damage to the endothelium.

Superficial Thrombophlebitis Chemical Triggers

Chemical irritation added by medications including antibiotics, chemotherapy, and hypertonic solutions.

Superficial Thrombophlebitis Clinical Presentation

Pain, redness (erythema), warmth, palpable cord-like vein along its course, and tenderness that is usually superficial and visible.

Superficial Thrombophlebitis Ultrasound Findings

Non-compressible superficial vein, echogenic thrombus within the lumen, thickened vein wall, and hypoechoic surrounding tissue from local inflammation.

Paget-Schroetter Syndrome (Effort Thrombosis)

An acute, effort-induced DVT of the axillary and/or subclavian vein, caused by repetitive arm motion combined with venous compression at the thoracic outlet.

Paget-Schroetter Patient Profile

Young, otherwise healthy patients, especially athletes doing repetitive overhead activity such as weightlifters, swimmers, and baseball/tennis players.

Paget-Schroetter Compression Mechanism

Repetitive arm motion mechanically compresses the subclavian vein between the clavicle and first rib, which is worse with abduction/shoulder movement.

Paget-Schroetter Virchow's Triad Trigger

Causes endothelial injury and stasis playing out through a purely mechanical, repetitive-motion trigger.

Paget-Schroetter Clinical Presentation

Sudden arm swelling (often the dominant arm), pain/heaviness, cyanosis, and prominent superficial veins appearing rapidly after exercise.

Classic Exam Tip for Paget-Schroetter

Young + active + sudden arm swelling = think Paget-Schroetter.

Superior Vena Cava (SVC) Syndrome

Impaired venous return through the SVC, causing venous congestion of the head, neck, and upper extremities.

Malignant Etiologies of SVC Syndrome

The most common causes overall, including lung cancer, lymphoma, and mediastinal tumors.

Non-Malignant Etiologies of SVC Syndrome

Central lines / PICC lines, pacemaker wires, thrombosis, fibrosis, or stenosis.

Hallmark Sign of SVC Syndrome

Facial swelling.

SVC Syndrome Clinical Presentation

Facial swelling, neck vein distention, bilateral upper extremity swelling, chest wall collateral veins, shortness of breath, headache, fullness in the head, and cyanosis.

SVC Syndrome Doppler Findings

Continuous waveform bilaterally, loss of phasicity, and loss of cardiac pulsatility.

SVC Syndrome Key Diagnostic Clue

Symmetric abnormal waveforms on both sides, since a one-sided problem has no way to affect the other arm's waveform.

Central Locations Inaccessible to Compression Duplex

Subclavian, proximal internal jugular, innominate, and part of the axillary veins.

Subclavian Vein Compression Maneuver

Having the patient take a deep breath through pursed lips (or sniff) to collapse the subclavian vein when compression is hindered by the overlying clavicle.

Alternative Evaluation for Non-Compressible Central Veins

Relying on color and spectral Doppler instead of direct mechanical compression.

Access Limitations in Upper Extremity Venous Duplex

Dressings or existing IV catheters that limit physical access to veins, requiring examiner reliance on color and spectral Doppler.

Upper Extremity Anatomical Variation

Greater anatomical variation in the upper extremity than the lower extremity, which can make vessel identification less straightforward.

Upper Extremity Venous Augmentation Characteristics

Naturally less dramatic in the arm due to less total blood volume, which does not mean the test is unreliable.

Virchow's Triad Components

Venous stasis, endothelial injury, and hypercoagulability.

Dominant Virchow's Triad Component in Upper Extremity DVT

Endothelial injury carries the most weight because arm veins are accessed constantly for IVs, blood draws, PICC lines, and central lines.

Primary Driver Contrast: Leg DVT vs. Arm DVT

Leg DVT is usually stasis-driven; arm DVT is usually injury-driven.

Catheter-Induced Venous Stasis Mechanism

A catheter partially obstructing flow slows blood movement and raises clot risk.

Hypercoagulability Risk Groups in Upper Extremity DVT

Cancer patients, critically ill patients, and post-surgical patients.

PICC Line Insertion Site

Peripheral arm vein: basilic (most common), cephalic, or brachial.

Most Common PICC Line Peripheral Insertion Vein

The basilic vein.

PICC Line Path to Tip

Advanced through axillary $\rightarrow$ subclavian $\rightarrow$ brachiocephalic $\rightarrow$ SVC.

PICC Line Key Distinction

Peripheral-then-advanced path.

Central Venous Catheter Insertion Sites

Directly into a large central vein: internal jugular (most common), subclavian, or common femoral.

Most Common Central Venous Catheter Insertion Vein

The internal jugular vein.

Central Venous Catheter Path to Tip

Inserted directly with tip in the SVC or near the right atrium.

Central Venous Catheter Key Distinction

Direct-central insertion.

PICC Line Anatomic Pathway Trajectory

Rides along the normal venous return pathway from a peripheral arm vein to the SVC.

Sonographic Appearance of a Catheter

Bright, echogenic, linear structures within the lumen, typically running parallel to the vessel walls.

Catheter Distinction from Surrounding Thrombus

The parallel course of the bright echogenic linear structure within the lumen distinguishes the catheter itself from any surrounding thrombus.

Catheter-Related Thrombosis Gray Scale Findings

Echogenic material surrounding the catheter, possibly with wall thickening.

Catheter-Related Thrombosis Color Doppler Findings

Incomplete filling or absent flow around the catheter.

Catheter-Related Thrombosis Spectral Doppler Findings

Dampened or continuous waveforms if obstruction is significant.

Form of Venous Thoracic Outlet Syndrome with Thrombosis

Paget-Schroetter syndrome (effort thrombosis).

Palpable Cord-Like Vein Significance

A physical exam sign indicative of superficial thrombophlebitis along the affected superficial vein.

Hypoechoic Surrounding Tissue Significance

An ultrasound finding in superficial thrombophlebitis caused by local tissue inflammation.

Obstacle to Subclavian Vein Compression

The overlying clavicle.

Upper Extremity vs. Lower Extremity Inspiration Contrast

Upper extremity and lower extremity veins respond oppositely to inspiration.

Superior Vena Cava Primary Drainage Basin

Receives venous drainage from the head, neck, and upper extremities.

Axillary and Subclavian DVT Mechanism in Athletes

Repetitive overhead arm motion combined with mechanical compression at the thoracic outlet.