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Obstructed defecation: current status of pathophysiology and management
1Colorectal Unit, St George Hospital, Sydney, New South Wales, Australia.
The Australian and New Zealand Journal of Surgery
|February 1, 1995
Summary
Obstructed defecation, or anismus, may be more complex than a simple pelvic floor disorder. Identifying specific pathophysiological causes is crucial for effective treatment and patient selection.
Area of Science:
- Gastroenterology
- Colorectal Surgery
- Pelvic Floor Disorders
Background:
- Obstructed defecation is a challenging clinical issue with often undetermined pathophysiology.
- Current diagnostic and treatment approaches focus on pelvic floor musculature, lacking objective data.
- Concepts like 'puborectalis paradox' and 'spastic pelvic floor' are widely accepted but lack empirical support.
Purpose of the Study:
- To explore the complex pathophysiology of obstructed defecation beyond simple pelvic floor dysfunction.
- To highlight the need for identifying specific underlying disorders for effective treatment.
- To emphasize careful patient selection based on pathophysiological diagnosis.
Main Methods:
- Review of current understanding and emerging evidence on defecation mechanisms.
- Analysis of potential pathophysiological causes of obstructed defecation.
- Emphasis on diagnostic approaches for patient stratification.
Main Results:
- Defecation is an integrated process of colonic and rectal emptying.
- Anismus may involve more complex mechanisms than previously thought.
- Simple causes like internal sphincter hypertonia or rectocele exist and are surgically correctable.
Conclusions:
- Obstructed defecation requires a broader understanding of pathophysiology.
- Accurate diagnosis of underlying disorders is essential for successful treatment.
- Targeted interventions based on specific pathophysiological findings improve patient outcomes.