triangle of Petit


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Related to triangle of Petit: Grynfeltt triangle, triangle of auscultation

triangle of Petit

The space above the hip bone between the exterior oblique muscle, the latissimus dorsi, and the interior oblique muscle.
See also: triangle
Medical Dictionary, © 2009 Farlex and Partners
References in periodicals archive ?
The video described her technique, beginning with identifying the triangle of Petit. Once the triangle is identified, a beveled needle is advanced slowly, "as to appreciate the 'double pop sensation' of the needle as it passes the fascia of the external and internal oblique muscles.
TAP block can be performed through the lumbar triangle of Petit formed by external oblique muscle anteriorly, latissimus dorsi muscle posteriorly, iliac crest inferiorly and is usually identified as a defect 1 cm above the iliac crest in the midaxillary line.
The major difference in needle insertion technique is that the needle is inserted perpendicular to the skin over the triangle of Petit for the blind technique; whereas the needle insertion point is more anterior and the needle direction is parallel to the TAP when using ultrasound, so that the needle is imaged in the plane of the beam.
The triangle of petit was identified by palpating the highest point of iliac crest and lower border of thoracic cage anterior to latismus dorsi and posterior to external oblique muscle.

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