Fig. 14From: Uroperitoneum in cattle: Ultrasonographic findings, diagnosis and treatmentSerum urea concentration after surgical treatment of ruptured urachus. Serum urea concentration after surgical treatment of ruptured persistent urachus in a 4-year-old Braunvieh x Brown Swiss cow. The yellow bar represents the reference interval for urea (2.7 to 5.7Â mmol/l)Back to article page