Functional constipation
| Functional constipation | |
|---|---|
| Other names | Chronic idiopathic constipation |
Functional constipation, also known as chronic idiopathic constipation (CIC), is defined by less than three bowel movements per week, hard stools, severe straining, the sensation of anorectal blockage, the feeling of incomplete evacuation, and the need for manual maneuvers during feces, without organic abnormalities. Many illnesses, including endocrine, metabolic, neurological, mental, and gastrointestinal obstructions, can cause constipation as a secondary symptom. When there is no such cause, functional constipation is diagnosed.[1]
Symptoms and diagnosis
Chronic idiopathic constipation is similar to constipation-predominant irritable bowel syndrome (IBS-C); however, people with CIC do not have other symptoms of IBS, such as abdominal pain.[2] Diagnosing CIC can be difficult as other syndromes must be ruled out as there is no physiological cause for CIC. Doctors will typically look for other symptoms, such as blood in stool, weight loss, low blood count, or other symptoms.
Causes
To be considered functional constipation, symptoms must be present at least a fourth of the time.[2] Possible causes are:
- Anismus
- Descending perineum syndrome
- Other inability or unwillingness to control the external anal sphincter, which normally is under voluntary control
- A poor diet
- An unwillingness to defecate
- Nervous reactions, including prolonged and/or chronic stress and anxiety, that close the internal anal sphincter, a muscle that is not under voluntary control
- Deeper psychosomatic disorders which sometimes affect digestion and the absorption of water in the colon
There is also possibility of presentation with other comorbid symptoms such as headache, especially in children.[3]
Treatment
Treatment options appear similar and include prucalopride, lubiprostone, linaclotide, tegaserod, velusetrag, elobixibat, bisacodyl, sodium picosulphate,[4] and most recently, plecanatide. In children and adolescents with functional constipation, the first line treatment is polyethylene glycol; while other treatments such as increasing fiber or water intake above daily recommended levels or probiotics have not been found to be helpful.[5]
Research
A 2014 meta-analysis of three small trials evaluating probiotics showed a slight improvement in management of chronic idiopathic constipation, but well-designed studies are necessary to know the true efficacy of probiotics in treating this condition.[6]
Children with functional constipation often claim to lack the sensation of the urge to defecate, and may be conditioned to avoid doing so due to a previous painful experience.[7] One retrospective study showed that these children did indeed have the urge to defecate using colonic manometry, and suggested behavioral modification as a treatment for functional constipation.[8]
See also
References
- ^ Shin, Jeong Eun (2022). "Functional Constipation". Sex/Gender-Specific Medicine in the Gastrointestinal Diseases. Singapore: Springer Nature Singapore. p. 259–272. doi:10.1007/978-981-19-0120-1_17. ISBN 978-981-19-0119-5.
- ^ a b "Americal College of Gastroenterology: Fuinctional Bowel Disorders" (PDF). Archived from the original (PDF) on 2011-09-27. Retrieved 2010-06-26.
- ^ Inaloo S, Dehghani SM, Hashemi SM, Heydari M, Heydari ST (2014). "Comorbidity of headache and functional constipation in children: a cross-sectional survey". Turk J Gastroenterol. 25 (5): 508–11. doi:10.5152/tjg.2014.6183. PMID 25417610.
- ^ Nelson, AD; Camilleri, M; Chirapongsathorn, S; Vijayvargiya, P; Valentin, N; Shin, A; Erwin, PJ; Wang, Z; Murad, MH (September 2017). "Comparison of efficacy of pharmacological treatments for chronic idiopathic constipation: a systematic review and network meta-analysis". Gut. 66 (9): 1611–1622. doi:10.1136/gutjnl-2016-311835. hdl:1805/12164. PMID 27287486. S2CID 206964065.
- ^ Mulhem, E; Khondoker, F; Kandiah, S (1 May 2022). "Constipation in Children and Adolescents: Evaluation and Treatment". American Family Physician. 105 (5): 469–478. PMID 35559625.
- ^ Ford, Alexander C; Quigley, Eamonn M M; Lacy, Brian E; Lembo, Anthony J; Saito, Yuri A; Schiller, Lawrence R; Soffer, Edy E; Spiegel, Brennan M R; Moayyedi, Paul (2014). "Efficacy of Prebiotics, Probiotics, and Synbiotics in Irritable Bowel Syndrome and Chronic Idiopathic Constipation: Systematic Review and Meta-analysis". The American Journal of Gastroenterology. 109 (10): 1547–1561. doi:10.1038/ajg.2014.202. ISSN 0002-9270. PMID 25070051. S2CID 205100508.
- ^ Fleisher, DR (November 1976). "Diagnosis and treatment of disorders of defecation in children". Pediatric Annals. 5 (11): 71–101. doi:10.3928/0090-4481-19761101-07. hdl:10355/5155. PMID 980548.
- ^ Firestone Baum, C; John A; Srinivasan K; Harrison P; Kolomensky A; Monagas J; Cocjin J; Hyman PE (January 2013). "Colon manometry proves that perception of the urge to defecate is present in children with functional constipation who deny sensation". Journal of Pediatric Gastroenterology and Nutrition. 56 (1): 19–22. doi:10.1097/MPG.0b013e31826f2740. PMID 22922371. S2CID 46075633.