WordNet

a three-sided polygon (同)trigon, trilateral
something approximating the shape of a triangle; "the coastline of Chile and Argentina and Brazil forms two legs of a triangle"
a percussion instrument consisting of a metal bar bent in the shape of an open triangle
any of various triangular drafting instruments used to draw straight lines at specified angles

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三角形 / 三角形の物 / 《米》三角定規 / (楽器の)トライアングル / 三つ組,三人組;(男女の)三角関係

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出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2015/10/21 08:49:31」(JST)

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The clavipectoral triangle (also known as the deltopectoral triangle) is an anatomical region found in humans and other animals. It is bordered by the following structures:

Pectoralis major muscle
Deltoid muscle
Clavicle

It contains the cephalic vein,^[1] and deltopectoral fascia, which is a layer of deep fascia that invests the three structures that make up the border of the triangle, and also the cephalic vein in the triangle.

The subclavian vein and the subclavian artery may be accessed via this triangle, as they are deep to it.

References

^ shoulder/surface/surface1 at the Dartmouth Medical School's Department of Anatomy

External links

Anatomy photo:04:03-0101 at the SUNY Downstate Medical Center - "Pectoral Region: Deltopectoral Triangle"

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English Journal

Ultrasound guided cephalic vein cannulation (in the deltopectoral triangle) in severe hypoxemic non-invasive ventilated patient.

Bertini P, Frediani M, Roncucci P.
Minerva anestesiologica.Minerva Anestesiol.2012 Nov;78(11):1311-2. Epub 2012 Apr 4.
PMID 22475808

The clinical anatomy of the cephalic vein in the deltopectoral triangle.

Loukas M1, Myers CS, Wartmann ChT, Tubbs RS, Judge T, Curry B, Jordan R.Author information 1Department of Anatomical Sciences, St. George's University, School of Medicine, Grenada, West Indies. edsg2000@yahoo.comAbstractIdentification and recognition of the cephalic vein in the deltopectoral triangle is of critical importance when considering emergency catheterization procedures. The aim of our study was to conduct a cadaveric study to access data regarding the topography and the distribution patterns of the cephalic vein as it relates to the deltopectoral triangle. One hundred formalin fixed cadavers were examined. The cephalic vein was found in 95% (190 right and left) specimens, while in the remaining 5% (10) the cephalic vein was absent. In 80% (152) of cases the cephalic vein was found emerging superficially in the lateral portion of the deltopectoral triangle. In 30% (52) of these 152 cases the cephalic vein received one tributary within the deltopectoral triangle, while in 70% (100) of the specimens it received two. In the remaining 20% (38) of cases the cephalic vein was located deep to the deltopectoral fascia and fat and did not emerge through the deltopectoral triangle but was identified medially to the coracobrachialis and inferior to the medial border of the deltoid. In addition, in 4 (0.2%) of the specimens the cephalic vein, after crossing the deltopectoral triangle, ascended anterior and superior to the clavicle to drain into the subclavian vein. In these specimens a collateral branch was observed to communicate between the cephalic and external jugular veins. In 65.2% (124) of the cases the cephalic vein traveled with the deltoid branch of the thoracoacromial trunk. The length of the cephalic vein within the deltopectoral triangle ranged from 3.5 cm to 8.2 cm with a mean of 4.8+/-0.7 cm. The morphometric analysis revealed a mean cephalic vein diameter of 0.8+/-0.1 cm with a range of 0.1 cm to 1.2 cm. The cephalic vein is relatively large and constant, usually allowing for easy cannulation.
Folia morphologica.Folia Morphol (Warsz).2008 Feb;67(1):72-7.
Identification and recognition of the cephalic vein in the deltopectoral triangle is of critical importance when considering emergency catheterization procedures. The aim of our study was to conduct a cadaveric study to access data regarding the topography and the distribution patterns of the cephal
PMID 18335417

Axillary nerve repair by triceps motor branch transfer through an axillary access: anatomical basis and clinical results.

Bertelli JA1, Kechele PR, Santos MA, Duarte H, Ghizoni MF.Author information 1Department of Orthopedic Surgery, Governador Celso Ramos Hospital, Florianópolis, Brazil. bertelli@matrix.com.brAbstractOBJECT: Grafting or nerve transfers to the axillary nerve have been performed using a deltopectoral approach and/or a posterior arm approach. In this report, the surgical anatomy of the axillary nerve was studied with the goal of repairing the nerve through an axillary access.
Journal of neurosurgery.J Neurosurg.2007 Aug;107(2):370-7.
OBJECT: Grafting or nerve transfers to the axillary nerve have been performed using a deltopectoral approach and/or a posterior arm approach. In this report, the surgical anatomy of the axillary nerve was studied with the goal of repairing the nerve through an axillary access.METHODS: The axillary n
PMID 17695392

「三角筋胸筋三角」

Clavipectoral triangle
	Superficial muscles of the chest and front of the arm.
	Superficial veins of the upper limb.
Details
Latin	trigonum clavipectorale
Dorlands; /Elsevier	t_19/12823394
	Anatomical terminology