Overflow around an impaction
After 6 days without a formed bowel movement while taking daily morphine, the most likely problem is fecal impaction: a mass of hard, dry stool that she cannot pass. Bacteria and secretions liquefy stool above the mass, and that liquid seeps around the hard stool and leaks out in small amounts. This paradoxical diarrhea (overflow) is easily mistaken for true diarrhea. Small, frequent leaks of liquid stool after days without a formed stool point to impaction, not infection. The diagnosis is confirmed by digital rectal examination.
Why she is confused
In older adults, fecal impaction often presents atypically. Abdominal discomfort, restlessness, urinary retention, and new confusion (delirium) may be the main signs. Her age, opioid use, and reduced mobility in long-term care all raise the risk. The confusion should prompt the nurse to look for a reversible cause, and constipation with impaction is a common one.
Why the other explanations do not fit
Infectious diarrhea, such as Clostridioides difficile infection, is unlikely because she is afebrile at 36.8 °C, has had no antibiotics in the past 3 months, and has not had a formed stool for days, which is the opposite of an infectious pattern. Opioid withdrawal can cause loose stools, but she takes morphine daily and nothing suggests missed doses. Fecal incontinence from a weak anal sphincter would not explain the 6-day absence of formed stool or the abdominal discomfort. Watch out! Giving an antidiarrheal to a client with overflow would worsen the impaction.
| Feature | Fecal impaction with overflow | Infectious diarrhea |
|---|
| Preceding pattern | Days without formed stool | Usually normal stools before |
| Stool | Small, frequent liquid leaks | Large-volume watery stools |
| Fever | Usually absent | Often present |
| Risk factors | Opioids, immobility, older age | Antibiotics, exposure to infection |
| Confirming step | Digital rectal examination | Stool testing |
Exam takeaway
When liquid stool appears after several days without a formed stool, especially in an older adult on opioids, think impaction first and confirm by rectal examination before any antidiarrheal is considered. Key point! New confusion in an older adult can be the presenting sign of fecal impaction.