In the renal sinus, there are 7 to 8 funnel-shaped calyces that encircle the renal papillae, 2 to 3 calyces that form a large calyx, and 2 to 3 large calyces that converge to form a flattened, funnel-shaped renal pelvis. Blunted renal calyces refer to the blunted anterior and posterior flattened, funnel-shaped shape of the renal calyces due to some organic condition. So, what foods are not suitable for patients with blunt renal calyces? Avoid eating foods: 1. Avoid eating foods with high salt content; 2. Avoid eating foods containing purines and high nitrogen; 3. Avoid eating foods with high potassium.