Ultrasonographic diagnosis of small-intestinal intussusception in three foals.

The research focused on the use of ultrasonography for diagnosing small-intestinal intussusception in three foals, observing that this technique provides clear, non-invasive insights that can enhance detection and treatment of colic in foals.

Ultrasonographic Diagnoses of Intussusception

• The study examined three foals afflicted with small-intestinal intussusception—a condition where a portion of the intestine telescopes into an adjacent segment. The researchers sought to diagnose this condition using ultrasonography.
• The ultrasound results revealed a target-like pattern characterized by a thick hypoechoic rim. This pattern was found on cross-sectional ultrasonography through the apex of the intussusceptum (the part of the intestine that is pulled inside the outer segment).
• The thick hypoechoic rim observed on the scanning images was due to severe edema (swelling caused by excess fluid) in the entering and returning walls of the intussusceptum.

Sonographic Interpretation of Intestinal Edema

• On parts of the intestines where the edema or swelling was less severe, the ultrasound images displayed two concentric rings accompanied by an inner circular area. Here, the outer ring and the inner circular area were hypoechoic and depicted the returning and the entering wall of the intussusceptum, respectively.
• Another cross-sectional pattern described in the study was double concentric rings with the intestinal lumen represented by a central, echogenic core.
• Longitudinal scanning of the involved intestinal section gave a different view of the same anatomical situation, showing two hyperechoic areas separated by three stripes of hypoechoic intestine.

Importance of Ultrasonography in Clinical Practice

• The study found that abdominal ultrasonography in foals provides a quick, non-invasive tool for clinicians to use to potentially aid in the differential diagnosis of colic—a severe, often fluctuating pain in the abdomen.
• The study concluded that ultrasonography can enhance the diagnosis of intussusception by improving the recognition of surgical lesions, thus potentially increasing the success rates of treatments for this condition.