The main arterial supply to the pectoralis muscle is the thoracoacromial
artery which is a branch of the second portion of the axillary artery.
In case of surrounding muscles near the clavicle, the presence of neurovascular structures like a transverse cervical artery, the internal or external jugular veins, and thoracoacromial
trunk significantly limits the choice of potential needle site.
Although the thoracoacromial
artery may be present at the interfascial plane, it is easily visualized by ultrasonography.
The arterial supply to the breast is derived from branches of the internal mammary artery, lateral thoracic artery, intercostal artery and pectoral branch of the thoracoacromial
axis (see Figure 6).
Blood supply for the muscle pedicle is from thoracoacromial
artery and vein (Thorne et.
(12) Blood supply to PM muscle is derived primarily from the pectoral branch of the thoracoacromial
artery and to a lesser degree the internal mammary and lateral thoracic arteries.
The expanded supraclavicular flap, prefabricated with thoracoacromial
vessels, for reconstruction of postburn anterior cervical contractures.Plast Reconstr Surg 2007; 119(7): 2072-7.
The PHCA can further anastomose with the deltoid branch of thoracoacromial
artery (ramus deltoideus arteriae thoracoacromialis) and the acromial branches of suprascapular artery (rami acromiales arteriae suprascapularis).
Cautery would divide the intercostals perforating vessels leaving the muscle flaps nourishment mainly by their thoracoacromial
Colour flow Doppler was used to identify the axillary artery and also its thoracoacromial
branch in this area.
The axillary artery normally branches off the superior thoracic artery in the first part, the lateral thoracic and thoracoacromial
arteries in the second part, and the subscapular, anterior circumflex humeral, and posterior circumflex humeral arteries in the third part (Drake et al, 2015).
Hemostasis should be achieved because the acromial branch of the thoracoacromial
artery travels in proximity to the CA ligament.