Diagnostics
Assessing the Positive Predictive Value of International Classification of Diseases Code K55.0 for Identifying Acute Mesenteric Ischaemia
By Meis Jawad, Yasmin Soltanzadeh-Naderi, Talha Butt and 1 others.
Abstract
Background
Acute mesenteric ischaemia (AMI) includes acute superior mesenteric artery (SMA) thrombosis and embolism, venous AMI, and non-occlusive mesenteric ischaemia (NOMI). Patients with AMI are identified using the International Classification of Diseases (tenth revision (ICD-10)) code K55.0 (acute vascular disorders of the intestine). Reporting of outcomes depends on reliable case identification.
Methods
A retrospective review of all patients assigned with ICD-10 code K55.0 at a tertiary university hospital between 1st January 2023 and 31st December 2025 was performed. Medical records and imaging findings were scrutinized to validate the diagnosis.
Results
Among 218 patients assigned ICD-10 code K55.0, 117 (53.7%) had confirmed AMI and 198 (90.8%) had acute gastrointestinal ischaemia. Patients with NOMI (n = 30, 53.3%) had a higher bowel resection rate than patients with embolic SMA occlusion (n = 21, 23.8%; p = 0.039) or venous AMI (n = 15, 6.7%; p = 0.012). The in-hospital mortality rate was lower in patients with venous AMI (6.7%) than in patients with NOMI (66.7%; p < 0.003) or thromboembolic SMA occlusion (42.9%; p = 0.015).