Different urinalysis appearances in children with simple and perforated appendicitis

Area of Science:

• Pediatric Emergency Medicine
• Clinical Diagnostics
• Urology

Background:

• Acute appendicitis is a common surgical emergency in children.
• Distinguishing between simple and perforated appendicitis is crucial for appropriate management.
• Current diagnostic methods may not always be definitive.

Purpose of the Study:

• To evaluate the utility of routine urinalysis in differentiating simple appendicitis from perforated appendicitis in pediatric patients.
• To identify specific urinalysis parameters that can predict appendiceal perforation.

Main Methods:

• Prospective collection of 357 children with suspected acute appendicitis.
• Performance of routine urinalysis (chemical and microscopic examinations) prior to surgery.
• Analysis using receiver operating characteristic (ROC) curves for urine white blood cell (WBC) and red blood cell (RBC) counts.

Main Results:

• Urine ketone bodies, leukocyte esterase, specific gravity, pH, WBC, and RBC counts were significant in differentiating appendicitis severity (P < .05).
• Positive urine ketone bodies and nitrate levels significantly predicted perforated appendicitis (P = .002 and P = .008).
• ROC curve analysis suggested cutoff values of 2.0/hpf for urine RBC and 4.0/hpf for urine WBC for predicting perforation.

Conclusions:

• Routine urinalysis can assist in distinguishing between simple and perforated appendicitis in children.
• Specific urine parameters, including ketone bodies and nitrates, are valuable predictors of appendiceal perforation.
• These findings can support emergency physicians in clinical decision-making for suspected appendicitis.