Shoffara-Rive Zone

Shoffara - Rive zone

The Choffard-Rivet zone is a triangle with an apex in the center of the lung, formed by three straight lines drawn from the apex of the left lung to the corresponding angle of the right lung and to the base of the left clavicle, i.e. to the II-V intercostal spaces on the left. When the left lung is removed, the base of the triangle lies on the 4th-8th ribs on the left. Of the above three lines, the straight line running from the posterior pole of the right lung to the corresponding point of the II-IV ribs on the left is usually the longest and is located on the side opposite the position of the heart and diaphragm, and can be easily outlined from the conditions existing during normal breathing. The right lung pushes the corresponding part of the lower lobe of the left lung downwards, and the upper lobe of the right lung stands inward in relation to the underlying part of the upper lobe of the right and left lungs. This can be seen upon comparative examination of the left and right contours of the subcap areas. Here, due to the pressure of the lower dilated heart, the lower lobe of the left lung goes down almost to the anterior midline, from here it is easy to measure the upper lobe of the right lung perpendicular to the supracollar connecting line and obtain the corresponding length of the right side of the triangle. If you compare the right contours of the subcap area by comparing the subcap spaces on the left and right, then you can quite accurately determine the height of the triangle.

Meanwhile, the base of the upper pole of the lung is clearly defined at the angle of the esophagus. Therefore, it remains to find the direction of a straight line drawn from the top of the left side of the triangle to the base of the right collarbone: move your gaze from one side to the other, then clearly determine the place from which you need to draw this line. The formation of a triangle results in the smallest possible shape known as a triangle. The upper side of this triangle is limited by a line running parallel to the left axillary line (extended to the level of the axillary folds) in the direction of the upper border of the pancreas. This line crosses the diaphragm approximately 4-5 cm above the 9th rib. The middle side of the triangle is defined as a continuation of the upper border of the posterior part of the right half of the subclavian fossa (first thoracic rib) and intersects the right wall of the left pleural cavity under the second intercostal space. The lower side of the triangle is adjacent to the right pleura, starting from the 4th intercostal space in the region of the second rib near the edge of the sternum, here the triangle ends at the point of the estimated limit of expansion of the lower pulmonary edge. The larger diameter of the triangle usually lies in the range of 7-12 cm, but with significant expansion it can reach a length of 15-20 cm. Sometimes these wide triangles contain almost all the bases in the right half. In such cases, the top side of the triangular figure may form an irregular triangle, shaped like an equilateral or unequal triangle. The base of the triangle passes through the IV-VIII costal arch on the left and parallel to the XI rib on the right.

The Chauffard-Rivet zone or shoffarid (chauffard triangle - literally: “Chauffard triangle”) is a topographic point with coordinates 53° R (the third and fourth letters of the Latin alphabet R are better replaced here with R or RR, so as not to fall into the more famous Rivet zone ), ΔΔΠ (the first and second letters π can be abbreviated to ΔΠ). This is one of the types of puncture of the ilium, the so-called Chauffard puncture or Rives Chauffard. The point is named after the French surgeon Jean Baptiste Joseph Chauffard, who, according to the Brockhaus and Efron encyclopedia, performed Chauffard operations with associated local anatomical studies. On the other hand, other points with coordinates ΔΔΔΔ are also possible