References: Laxative
Gut. 1994 Jun;35(6):798-802.
Discriminant value of psychological distress, symptom profiles, and segmental colonic dysfunction in outpatients with severe idiopathic constipation.
Grotz RL, Pemberton JH, Talley NJ, Rath DM, Zinsmeister AR.
Department of Health Sciences Research, Mayo Clinic, Rochester.
Severe idiopathic constipation can be categorised based on physiological testing into subgroups including slow transit constipation and pelvic floor dysfunction. This study aimed to determine if colonic and psychological symptoms, or rectosigmoid transit times, could discriminate among these subgroups. Patients, categorised according to total colonic transit times and pelvic floor function testing, completed a self report questionnaire that recorded symptoms and psychological distress. Patients with normal transit constipation (n = 60) had significantly increased depression scores compared with those who had slow transit constipation (n = 70) or pelvic floor dysfunction (n = 30). The general severity index (GSI, a measure of overall psychological distress) negatively but weakly correlated with total colonic transit (r = -0.26, p < 0.01). A feeling of anal blockage was the only symptom that was associated with pelvic floor dysfunction (v normal transit constipation). Only a more regular defecation pattern, utilisation of different postures to defecate, and a feeling of incomplete evacuation were associated with slow v normal transit constipation. Psychological or colonic symptoms were not, however, significant discriminators in a multivariate analysis. Rectosigmoid transit times at 80% sensitivity had very poor specificity for discriminating pelvic floor dysfunction from other subgroups. It is concluded that clinical symptoms, psychological distress, and rectosigmoid transit times cannot be used to identify subgroups of patients with intractable constipation.
Laxative online source: www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=8020809&dopt=Abstract constipation laxative colon cleansing
Dig Dis Sci. 1994 Jul;39(7):1558-64.
Anorectal manometric abnormalities and colonic propulsive impairment in patients with severe chronic idiopathic constipation.
Bassotti G, Chiarioni G, Vantini I, Betti C, Fusaro C, Pelli MA, Morelli A.
Dipartimento di Medicina Clinica, Universita di Perugia, Italy.
Idiopathic chronic constipation is a frequent and disabling symptom, but its pathophysiological grounds are still poorly understood. In particular, there is little knowledge about the relationships between distal (anorectal area) and proximal (colonic area) motor abnormalities in this condition, especially concerning high-amplitude propagated colonic activity. For this purpose, we studied 25 patients complaining of severe idiopathic constipation and categorized them as normal- or slow-transit constipation according to colonic transit time. Twenty-five age-matched controls were also studied. Investigations included standard anorectal motility testing and prolonged (24-hr) colonic motility studies. Analysis of results showed that both groups of constipated patients displayed significantly different (P < 0.05) minimum relaxation volumes of the internal anal sphincter, defecatory sensation thresholds, and maximum rectal tolerable volumes with respect to controls. Patients with normal-transit constipation also showed lower internal anal sphincter pressure with respect to slow-transit constipation and controls (P < 0.001 and P < 0.02, respectively). The daily number of high-amplitude propagated contractions (mass movements) as well as their amplitude and duration, was significantly reduced in both subgroups of constipated patients (P < 0.02 vs controls). We conclude that (1) in normal-transit constipation, motor abnormalities are not limited to the anorectal area; (2) patients with slow-transit constipation probably have a severe neuropathic rectal defect; (3) prolonged colonic motility studies may highlight further the functional abnormalities in constipated subjects; and (4) an appr
J Am Geriatr Soc. 1994 Sep;42(9):947-52.
Constipation: assessment and management in an institutionalized elderly population.
Harari D, Gurwitz JH, Avorn J, Choodnovskiy I, Minaker KL.
Division on Aging, Harvard Medical School.
OBJECTIVES: To examine prescribing and utilization patterns of laxatives, stool softeners, and enemas in a large, long-term care facility, to compare self-reports of constipation with specific, bowel-related symptoms in residents of this facility, and to examine concordance between bowel symptoms reported by residents and the assessments of the nursing staff. DESIGN: Cross-sectional study. SETTING AND SUBJECTS: All individuals residing in an academically oriented long-term care facility in the United States for at least 1 month (n = 694). MEASUREMENTS: Clinical, functional, and medication data were abstracted from the medical and nursing records. Individual interviews regarding bowel-related symptoms were conducted with all able participants (n = 456 (66%)) and their respective primary nurses, and concordance was determined. The study definition of symptom-specific constipation was no more than 2 bowel movements per week and/or straining on more than 1 in 4 bowel movements. RESULTS: Fifty percent (n = 367) of all residents used at least 1 daily laxative, stool softener or enema during a 1-month study period. Over half of all laxative users (n = 200) took more than 60 doses per month. Stool softeners were most commonly prescribed, followed by saline laxatives, stimulant laxatives, hyperosmolar laxatives, and bulk laxatives. Forty-seven percent (n = 213) of the 456 interview responders reported constipation ("self-reporters"), but only 62% of self-reporters met the study criteria for symptom-specific constipation. Concordance between resident's and nurse's report regarding specific bowel symptoms was only fair to slight (kappa 0.12-0.38). Self-reporters of constipation took almost twice as many laxatives, stool softeners, and enemas as residents who did not rep
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