Blood Supply of the Upper Limb quiz

Subclavian artery The subclavian artery begins at different origins on each side - the right from brachiocephalic trunk and left directly from aortic arch

First rib This transition point at the lateral border of the first rib is a crucial surgical landmark and helps define the axillary region

Pectoralis minor This creates three parts: 1st part above, 2nd part behind, and 3rd part below pectoralis minor - each with distinct branches

Cubital fossa This bifurcation occurs at the level of the neck of the radius, making it vulnerable during elbow injuries

Radial pulse The radial pulse at the anatomical snuffbox is particularly useful as radial nerve injury often affects this region

Superficial palmar arch This arch, formed mainly by the ulnar artery, provides collateral circulation when the radial artery is occluded

Lateral thoracic This artery also supplies the breast and is particularly important in breast reconstruction surgery

Dual blood supply to the hand This test evaluates the patency of both radial and ulnar arteries and their ability to supply the palmar arches

Deep branch of radial artery The deep palmar arch lies approximately 1 cm proximal to the superficial arch and is more complete and consistent in its anatomy

Thoracic outlet syndrome This can present with pain, numbness, and reduced blood flow to the arm, especially when raised above the head

Radial artery The radial artery is preferred due to its size match with coronary vessels and the presence of adequate collateral circulation via the ulnar artery

Brachial artery bifurcation This location is particularly vulnerable due to the sudden decrease in vessel diameter and change in direction

Brachial artery The brachial artery provides muscular branches that are vital for biceps function and are at risk during anterior approach to the humerus

Circumflex humeral arteries The anterior and posterior circumflex humeral arteries form an anastomotic ring that is crucial for rotator cuff healing

Superficial palmar arch The superficial palmar arch can have variable anatomy and may be abnormally superficial, making it vulnerable during surgery

Compartment syndrome This condition results from decreased blood flow to forearm muscles, often following supracondylar fractures affecting the brachial artery

Radial artery The radial artery passes through the anatomical snuffbox before entering the palm, making it palpable and vulnerable during wrist trauma

20% This anatomical variation is clinically significant when considering radial artery harvesting for coronary bypass

Princeps pollicis artery This branch from the radial artery is crucial for thumb viability and is a key consideration in thumb reconstruction

High bifurcation of brachial artery Present in about 15% of people, this variation can affect surgical planning and the length of available graft