You can download clinical courses and protocols from academic repositories like ResearchGate , which analyze the performance of medical imaging (ultrasound vs. CT scans) in identifying causes.

Most medical PDFs on this topic follow a standardized clinical pathway:

Guideline for the diagnostic pathway in patients with acute ... - PubMed

If you are looking for a medical guide or PDF on (acute non-traumatic abdominal pain), several authoritative medical protocols and diagnostic summaries are available online. These documents are designed to help healthcare professionals navigate the diagnostic challenges of abdominal pain, which represents 5% to 10% of emergency consultations. Recommended PDF Resources

The Société Française de Médecine d’Urgence (SFMU) provides a comprehensive document detailing the diagnostic pitfalls and etiologies (digestive, urological, or vascular) of acute abdominal pain.