Lymphatic Drainage of Upper Limb | Lymph Vessels & Lymph Nodes
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- čas přidán 27. 08. 2020
- EDIT:At 1:20 I've said the superficial and deep lymph vessels drain into axillary veins, but they drain into "Axillary group of lymph nodes "
At 3:50 the infraclavicular lymph nodes are nothing but the apical group of axillary lymph nodes( don't get confused by the arrow as I marked it to the lateral group of axillary lymph nodes)
The lymphatic system functions to drain tissue fluid, plasma proteins and other cellular debris back into the blood stream, and is also involved in immune defence.
Once this collection of substances enters the lymphatic vessels it is known as lymph. It is subsequently filtered by lymph nodes, from which it returns to the circulation via venous system.
Lymphatic Vessels
Superficial Lymphatic Vessels
The superficial lymphatic vessels of the upper limb initially arise from lymphatic plexuses in the skin of the hand (networks of lymphatic capillaries beginning in the extracellular spaces). These vessels then travel up the arm in close proximity to the major superficial veins:
The vessels shadowing the basilic vein go on to enter the cubital lymph nodes. These are found medially to the vein, and proximally to the medial epicondyle of the humerus. Vessels carrying on from these nodes then continue up the arm, terminating in the lateral axillary lymph nodes.
The vessels shadowing the cephalic vein generally cross the proximal part of the arm and shoulder to enter the apical axillary lymph nodes, though some exceptions instead enter the more superficial deltopectoral lymph nodes.
Deep Lymphatic Vessels
The deep lymphatic vessels of the upper limb follow the major deep veins (i.e. radial, ulnar and brachial veins), terminating in the humeral axillary lymph nodes. They function to drain lymph from joint capsules, periosteum, tendons and muscles. Some additional lymph nodes may be found along the ascending path of the deep vessels.
Lymph Nodes
The majority of the upper extremity lymph nodes are located in the axilla. They can be divided anatomically into 5 groups:
Pectoral (anterior) - 3-5 nodes, located in the medial wall of the axilla. They receive lymph primarily from the anterior thoracic wall, including most of the breast.
Subscapular (posterior) - 6-7 nodes, located along the posterior axillary fold and subscapular blood vessels. They receive lymph from the posterior thoracic wall and scapular region.
Humeral (lateral) - 4-6 nodes, located in the lateral wall of the axilla, posterior to the axillary vein. They receive the majority of lymph drained from the upper limb.
Central - 3-4 large nodes, located near the base of the axilla (deep to pectoralis minor, close to the 2nd part of the axillary artery). They receive lymph via efferent vessels from the pectoral, subscapular and humeral axillary lymph node groups.
Apical - Located in the apex of the axilla, close to the axillary vein and 1st part of the axillary artery. They receive lymph from efferent vessels of the central axillary lymph nodes, therefore from all axillary lymph node groups. The apical axillary nodes also receive lymph from those lymphatic vessels accompanying the cephalic vein.
Efferent vessels from the apical axillary nodes travel through the cervico-axillary canal, before converging to form the subclavian lymphatic trunk. The right subclavian trunk continues to form the right lymphatic duct, and enters the right venous angle (junction of internal jugular and subclavian veins) directly. The left subclavian trunk drains directly into the thoracic duct.
Clinical Relevance
Axillary Lymphadenopathy
Axillary lymphadenopathy refers to enlargement of the axillary lymph nodes. Common causes include:
Infection of the upper limb, resulting in lymphangitis (inflammation of lymphatic vessels, with tender, enlarged lymph nodes).
The humeral group of lymph nodes is usually affected first, and red, warm and tender streaks are visible in the skin of the upper limb.
Infections of the pectoral region and breast.
Metastasis of breast cancers.
Axillary Lymph Node Dissection
Removal and analysis of the axillary lymph nodes is often a vital tool for the staging of breast cancers. Interruption of lymphatic drainage from the upper limb can however result in lymphoedema, a condition whereby accumulated lymph in the subcutaneous tissue leads to painful swelling of the upper limb.
During this procedure there is also a risk of damage to either of the long thoracic nerve (potentially causing a winged scapula deformity), or the thoracodorsal nerve.
Edit: At 9:18 in this video the Axillary group of lymph nodes are said as 4 groups, but there are 5 groups of axillary group of lymph nodes
and for a video of clear in-depth explanation of Axillary group of lymph nodes you can check on this link below:
• AXILLARY LYMPH NODES |...
Thankyou n luvu ,its simply presented
You're welcome 😊, thank you
Thankyou sister... your explanation is so understandable 👍
Very simple,thank you 👌
You're welcome 😊
Easily understand 💕
thank you soo much
You're welcome 😊
Great video, thank you!
Are the infraclavicular lymph nodes in the superficial category then? Does that mean they are easy to examine, or does it require imaging like ultrasound? (especially if swollen)
i am a great fan of yr sketching.
Please keep doing these videos
Sure , keep watching❤️
You said lymph from medial side of forearm and medial three digits enter axillary lymph node but supratrochlear lymph node also collect lymph from medial side so which one is correct?
Great information, why there is a swollen node at the left shoulder/upper limb if there is no limb node there? is this the swollen of the lymph vessel? it is a small and painful node, what is the likely cause of this swollen node? This problem is from a elderly man. Thank you for the video
Why there is no lymphatic vessel in bone and cartilage ? Reason please
Thank u nice job create total anatomy mam
At 3:50 u said the deltopectoral L.N. drains into the apical grp of L.N. we all know that apical grp is ntng but the infraclavicular grp itself right; but the arrow u have drawn in the video is going towards the lateral grp instead of apical/infraclavicular grp
Plz correct it 😊
Thank you.. And sorry, will mention it in the description below
Aoa, Sister i have one request from you ; at the end of your every lecture do try show the whole explained lecture in one picture! By this we could easily take screenshot and revise in quick minute later on! hope you got/understood my point. Moreover keep up the good work, gonna subscribe/share your channel right away ;-)
I'm glad you liked it, I'll make those changes
Thank-you so much ❤😊,
@@Dr.KareemaTabassum One more thing to ask. As i'm 2nd year medical student i'm also planning to make a good youtube channel so that i could help others with my knowledge. So kindly tell me which video editor do you use for your editing?
Please check 1.26 part as you told superficial and deep lymph vessel drains into axillary veins
Yes, as a reference from Vishram shingh, text book of upper limb and thorax pg no-86😊
@@Dr.KareemaTabassum Ok 👍
But would it be axillary lymph nodes instead of axillary veins, like how will lymph drain into vein 😅
Yeah I said veins, sorry and thank you I'll mention it in the description below
@@Dr.KareemaTabassum Yes
Thank you 😊
Aweaome
Also,
At 1:38 u told us that superficial vessels are much less in no. as compared to deep one
But at 5:22 u told deep vessels are much less as compared to superficial one
So...which one is true??
Heya, I said superficial lymph vessels are much more than the deep lymph vessels at 1:37 and the deep lymph vessels are much less in number as compared to superficial lymph vessels at 5:21
@@Dr.KareemaTabassum
Ohkk ok
Ur accent sounded like *small* in no. Rather than *more* in no.😅
Thank you for correcting,no worries 😊 keep supporting
00:13 00:50 whot😃 3:50 🫠 5:20
7:05
👍
At 9:20 u wrote axillary lymph nodes r divided into 4 sets
But in ur video on axillary lymph nodes u taught that it includes 5 sets
The Edit is in Description below!
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