Bowel Dysfunction in the Elderly

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Bowel Dysfunction in the Elderly –
Constipation
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Dr Rachel Bradley
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Consultant Geriatrician University Hospitals Bristol NHS Trust
& St Martins Continence Promotion Unit, Bath
10th October 2012
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Prevalence and impact
Presentation concentrates on Functional/Primary causes
Normal and abnormal bowel function
Assessment & working diagnosis
Practical management advice
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Presentation
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Declaration of interest: member of constipation in the
elderly advisory board for Shire
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Introduction
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• Bowel dysfunction in the elderly is common (C & FI)
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• Significant impact on QOL of an individual
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• depression & social isolation
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– Financial
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• Carer stress
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cost of pads, healthcare time & drug costs
placement decisions
laxatives £46 million per year England
½ per week of district nurse time
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– Physical
– Psychosocial
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O’Keefe EA, et al.Bowel disorders impair functional status and quality of life in the elderly: a population-based study. Journals of Gerontology Series A-Biological Sciences & Medical Sciences.
Jul 1995. 50;4:M184-9
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Stenzelius K et al. Bowel function among people 75+ reporting faecal incontinence in relation to help seeking, dependency and quality of life. Journal of Clinical Nursing. Mar 2007 16;3:458-68
Health Technology Assessment (HTA). Systemic review of the effectiveness of laxatives in the elderly. 1997;vol1:No13
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Prevalence of Bowel Dysfunction
in the Elderly
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– 20% community dwelling elderly
– Up to 50% hospitals
– 2/3rds nursing home residence
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• Constipation
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• Faecal Incontinence
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– Estimated 1% community adults, 3-5% >65yr olds
– 10% Residential homes
– 30% Nursing home, up 60% EMI
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• Irritable Bowel Syndrome
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– Prevalence 14-24% women & 5-19% men
– 2% GP visits per year
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Donald IP et al. A study of constipation in the elderly living at home. Gerontology. 1985. 31/2(112-8)
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Bowel Care in Older People: Research into practice. Clinical Effectiveness & Evaluation Unit. Royal College of Physicians. 2002
Stenzelius K et al. Bowel function among people 75+ reporting faecal incontinence in relation to help seeking, dependency and quality of life. Journal of Clinical Nursing. Mar 2007 16;3:458-68
Tobin GW, Brocklehurst JC. Faecal incontinence in residential homes for the elderly: prevalence, aetiology and management. Age and Ageing. 1986. 15:41-46
NHS. Faecal incontinence. NICE clinical guidance 49. June 2007
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Consequences of Constipation
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• Feeling of incomplete evacuation
• Faecal loading/ impaction in rectum or colon
• REMEMBER this can occur with soft stool!
• Abdominal pain / low back pain
• Flatulence / abdominal distension
• Nausea / vomiting / headache
• Bladder dysfunction
• Confusion/Agitation
• Poor appetite
• Malaise
• Prolapse – rectal / vaginal
• Haemorrhoids
• Is not proven to cause toxaemia
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Classification of Constipation – Primary
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 Functional constipation
 Normal colonic transit (most common) - Normal stool frequency but
symptoms suggestive of constipation, but different to IBS
 Slow colonic transit (common in frail elderly) - May develop megacolon
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 Irritable Bowel Syndrome IBS (C)
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 Defaecation/ Pelvic Floor Disorders
 Pelvic floor dyssynergia (or anismus, outlet obstruction) – poor
coordination
 Rectal dyschezia – reduced rectal sensation & tone leading to impaction
 Rectocele & Enterocoele
 Rectal Prolapse
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 Dilated colon
 Idiopathic Megacolon/ Rectum
 Hirshsprung’s disease (rare)
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Classification of Constipation – Secondary
Metabolic & Endocrine
 Diabetes Mellitus
(diabetic autonomic enteropathy)
 Coeliac
 Chronic kidney disease
 Hypothyroidism
 Hyperparathyroidism
 Addison’s disease
 Amyloid
 Scleroderma
 Connective tissue disorders
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Intrinsic
 Colorectal Cancer
 Diverticulosis
 Inflammatory Bowel Disease
 Anorectal disorders such as Anal
Fissures & Haemorrhoids
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Post surgical abnormalities
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Neurological Conditions
 Spinal Cord Injury
 Multiple Sclerosis
 Parkinsons disease
 Stroke & cerebrovascular disease
 Dementia & frontal lobe injury
Electrolyte disturbances
 Hypercalcaemia
 Hypokalaemia
 Hypermagnesaemia
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Classification of Constipation – Secondary
Dietary factors
 Such as irregular meals
 Fibre content
 Fluids
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Psychological
 Depression & Anxiety
 Anorexia nervosa
 Bulimia
 Affective disorders
 Abuse
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Functional disability
 Due to age related co-morbidities
 Environment (common)
e.g. hospital admission
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Behavioural
 Lack of privacy and dignity
 Ignoring the ‘call to stool’
 Learning disabilities
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Immobility & Frailty
 Causing weak abdominal & pelvic
muscles
Secondary causes increasingly
important with age
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Polypharmacy & Drug Side Effects
 Laxative abuse
 Anticholinergic agents:
 Tricyclic antidepressants
 Antipsychotics
 Oxybutinin
 Diuretics:
 Furosemide
 Analgesics:
 Opiates, Tramadol, Codeine phosphate
 NSAIDS
 Iron & calcium supplements
 Calcium-channel blockers:
 Verapamil
 Aluminium-containing antacids
 Anti-parkinson’s drugs
 Anti-histamines
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Classification of Constipation – Secondary
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The Function of the Colon
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Hepatic flexure
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Caecum
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Sigmoid colon
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4. Stool arrives in
solid form in the
rectum
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Splenic flexure
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2. Stool passes
along the colon
by peristalsis
1. Stool in liquid
form as passes
through Ileocaecal valve
3. Colon absorbs
water (&salts)
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Transverse colon
Appendix
Anal canal
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Peristalsis
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• Muscular contractions of the gut, secretion of acids
and enzymes are under autonomic control
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• Enteric autonomic nervous system forms
ganglionated plexuses with complex
interconnections to smooth muscle, mucosa & blood
vessels
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• The ganglia receive extrinsic excitatory fibres from
the vagus nerve (parasympathetic) & inhibitory
fibres from the sympathetic fibres (ACh). There are
also reflex circuits that react to stimuli
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• Other transmitters in include 5-hydroxytryptamine
(5HT), adenosine triphsphate (ATP), nitric oxide &
neuropeptide-Y
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Bowel Control
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• Normal average transit time 3days,
(variance x3/d to x3/wk)
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• Requires intact cerebral & spinal reflexes
• Enteric autonomic nervous system &
proprioceptive sensation
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• Two sphincters (internal & external)
in the anus supplied by
– Pudendal nerve & Hypogastric (autonomic)
nerves formed from 2nd, 3rd & 4th Sacral nerves
• Functioning pelvic floor muscles
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The ‘Call to Stool’
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• Stool distends into the rectum activating the sacral nerve reflex arc
• Sensation ‘Call to Stool’. Sensory discrimination between liquid, gas or solid
• The Pubo-rectalis muscle creates an angle of 60-105 degrees between the anal
canal and the rectum by pulling forwards, this relaxes and the stool passes
through to the external sphincter
• External sphincter relaxes creating funnel shape
• Strong waves of peristalsis from internal sphincter and lower bowel occur
• Assisted by raised intra-abdominal pressure
• Voluntary contraction of the external sphincter can also prevent leakage of
flatus & stool and stop a stool from passing
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The Ageing Bowel
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• Age-related reduction in mesenteric neurones, but
stool frequency unchanged in healthy ageing
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• But more bowel evacuation
difficulties, straining
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• Multiple co-morbidities
• Functional disabilities
• Medication
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• Women > men
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Assessment
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Previous bowel habit
Associated symptoms
‘Bothersome factor’ & impact on QOL
Urinary symptoms
• Identify ‘Red Flag’ Symptoms
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• History of presenting complaint
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– Rectal bleeding, Wt loss, Nocturnal pain or
diarrhoea, anaemia & fever
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• Relevant Past Medical Hitory, Obstetric,
Surgical & Cognition
• Detailed drug history including OTC
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– Response to previous laxatives
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• Diet & Fluid intake
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– Response to dietary changes
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• Toileting Regimes
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Don’t forget to ask patients about
their over the counter remedies!
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Take a Detailed Bowel History
• What is meant by ‘Constipation’?
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– Variation in good health (x3/day to x3/week)
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‘Call to Stool’ or urge frequency
Stool frequency
Stool type
Straining
Feeling of incomplete evacuation
Abdominal pain
Bloating
Rectal/ Vaginal digitation
Remember the commonest cause of FI is Constipation
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• What are the most bothersome symptoms?
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• Keep a Stool diary
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• Objective evidence is useful
– Bristol Stool Form Scale
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• Diet & Fluid diary
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– 1-2 weeks
– Review fibre content
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Assessment
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Consent
Chaparone
RCN competency
Assess for masses, stool consistency & colour,
anal tone, puborectalis movement, & prolapse
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Nutritional status
Neurological (S3/4 sensation)
Abdominal Examination
Digital Rectal Examination (DRE)
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Examination
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DRE - What you are looking for?
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Form a Working Diagnosis based on history
and supported by examination
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• Remember that Constipation is a symptom not a
diagnosis look at predominant symptom profile.
For example:
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• IBS (C) – variability, abdominal pain
• Slow gut transit – very infrequent urge,
infrequent hard stools, straining, life long
• Rectocoele – straining, incomplete
evacuation, digitation
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However, in elderly often other confounding factors
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Is there such a thing as the Goldilocks
Stool?
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Stools of people aged 40–69 years
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Stool type
Women (n=613)
%
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3.8
13.4
8.5
16.9
Normal
*
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23.2
38.6
20.5
36.1
Loose
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9.2
11.9
Not reported
10.1
8.0
Not reported
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Men (n=510)
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Lumpy
Normal* stools account for 57–62% of all stools
*Those least likely to evoke symptoms (types 3 and 4)
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•Agree individual realistic ‘Goals of Treatment’ based
on symptom relief, not just stool type
•Trial of treatment & reassess
Heaton et al. Gut 1992;33(6):818-824
O’Donnell et al. Br Med J. 1990;300(6722):439-40
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Investigations
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Very few investigations are required for Functional Constipation.
Only use if diagnostic uncertainty, refractory to treatment or if
Musculus sphincter
surgery is being considered
ani internus
Blood tests
AXR & Colonic Transit Studies
Proctoscopy & Sigmoidoscopy
Barium studies
Colonoscopy & CT Colonogram
Defaecating Proctograms
Neurophysiology: EMG &
anorectal manometry
• Endoanal Ultrasound
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Musculus levator
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Musculus sphincter
ani externus
Bearing down
Rectum
Anal
sphincter
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Electromyograp
hy
(EMG)
Abnormal increase in anal pressure
with no relaxation on bearing down
Occuring in dyssinergic defaecation
Rao et al. Neurogastroenterology and Motility. 2011;23,8-23. Evaluation of Gastrointestinal Transit in Clinical Practice;
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Typical radiopaque markers1
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Investigations
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Number of markers remaining
Slow transit constipation is characterized by prolonged
delay in the transit of stool through the colon2
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Possible transit time study outcomes
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Normal Transit Time Slow transit Time
Majority of markers Markers scattered
passed by Day 5
throughout colon
Pelvic floor disorder
Most markers in rectum
or rectosigmoid*
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*Note: this represents a possible scenario, but pelvic floor
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disorders are not always visible via transit study
Chatoor & Emmanuel. Best Pract Res Clin Gastroenterol. 2009;23(4):517-30
Evans et al. Int J Colorect Dis. 1992;7:15-17; Image developed for programme
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2.
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10
8
6
4
2
0
0
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48
72
96
120
144
168
Time after ingestion of markers (h)
Normal transit
Mean
±2 standard deviations
Slow transit
Remaining cubes
Remaining cylinders
Remaining rings
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Management Principles
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• Exclude an organic and secondary causes
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Influence ‘what goes in’ (diet)
Bowel motility/ transit time
Consistency of what comes out (stool)
Evacuation problems
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• Primary Constipation Management
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• Despite the prevalence of functional bowel problems in the
elderly there remains a lack of good evidence based
research on this subject. Many studies have been small, ill
defined, relied on self-reporting of symptoms and have had
unclear outcome measures
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• Diet & Fluids
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regular meals or snacks
improve fibre (insoluble v soluble)
12-25g/day F, 30-38g/day M
adequate fluid intake
Dietician review for specialist/exclusion diets
• e.g gluten free, lactose intolerance
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Dietary Advice
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– other natural foods
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• e.g. Aloe vera, prunes, kiwi, linseeds
• ORTIS fruit cubes
Johanson. MedGenMed. 2007;9(2):25
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Establish a regular bowel routine &
re-educate the bowel
• Privacy & allow enough time
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‘Behind closed doors campaign 2006’
Especially important in Hospital
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• Utilise gastro-colic reflex
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• Improve toileting access & labelling
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– Especially for Dementia
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• Toilet seat height & position
• ‘Brace and bulge’ technique
1. Markwell S, Sapford R. 1995. Physiotherapy management of obstructed defaecation. Australian Journal of Physiotherapy.
41:29-83
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Lifestyle Advice
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Gut Motility in Healthy vs. Slow
Transit Constipation
Dinning et al. World J. Gastroenterol 2010;16(41):5162-5172.
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Can suppression of Defaecation affect Colonic
Motility?
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• This study was done in 12 young males and showed that voluntary
suppression of the urge to defaecate can affect bowel transit time
over a 2 week period
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•Ask patients about toilet avoiding habits, response to urge
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•What effect does toilet avoidance behaviour have in Dementia?
Klauser et al. Dig Dis Sci. 1990.35(10)1271-5
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Physiotherapy
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Beneficial in both FI & C
Restores sensation and better evacuation
Gives better ‘control’
Useful in dyssinergia
Less likely to be effective with neuro abnormality or 3rd
degree tear
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• Pelvic floor exercises (PFE) & Sphincter Exercises
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• Biofeedback techniques
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• Need more long-term follow up studies
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• Post-partum education
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Digital Stimulation & Digital Removal
of Faeces (DRF)
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• Digital stimulation be required in patients with
chronic neurological conditions or a Rectocoele
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Local damage
Autonomic dysreflexia
May require sedation or GA
RCN & ACA guidelines
Exceptions some chronic neurological diseases
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• DRF should NO longer be part of routine clinical
practice as recognised complications
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Drug Treatment for Constipation
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• Consider when lifestyle factors don’t work
• Treatment tailored to the individual
• Several drugs or dose adjustments may be
required
• Monitor effect using Bristol Stool Form Scale &
individual symptoms
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Bulk laxatives
Stimulant laxatives
Osmotic/Softener laxatives
Suppositories & enemas
Petticrew M. HTA 1997; Vol 1:No13. Systemic review of the effectiveness of laxatives in the elderly
Bosshard W, Dreher R, Schnegg JF, Bula CJ. The treatment of chronic constipation in elderly people – An update. Drugs Aging. 2004. 21:911-930
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Drug Treatment for Constipation
Bulk Laxatives
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• Bran, Ispaghula (Fybogel, Regulan), methylcellulose
(Celevac) & sterculia (Normacol)
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• Action increase faecal mass which stimulates peristalsis via
stretch receptors in the mucosa
• Useful 1st line small, hard stools, diverticular disease & IBS
• Take several days to work
• Must be taken with plenty of water
• Well tolerated
• Except avoid in megacolon as can make slow gut transit worse
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• Several small RCTs comparing Bulk laxitives in
elderly with placebo or normal diet.
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Cheskin et al. JAGS. 1995; 43(6)666-9
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• In this study 10 community dwelling elderly patients
• Reduced gut transit time, increased stool frequency
• However, no effect on pelvic floor dysinergesia
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Drug Treatment for Constipation
Stimulant Laxatives
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• Anthraquinones (Senna, Manevac, Dantron/Co-danthramer)
and diphenylmethane cathartics (Bisacodyl, Sodium Docusate)
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• Stimulate colonic nerves (myenteric plexus)
• SEs abdominal cramps, diarrhoea, hypoK & urine discolouration
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• Action 6-12hrs
• Useful short term/acute constipation
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– Danthron
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• Palliative care only (potentially carcinogenic)
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– Sodium docusate
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• Acts as a softener & stimulant
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– Castor oil & cascara are no longer used
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• unpredictable & dramatic results
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Kamm MA, Mueller-Lissner S, Wald A, et al. Oral bisacodyl is effective and well-tolerated in patients with chronic constipation. Clin
Gastroenterol and Hepatol 2011;9:577–583.
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• Improved quality of life among patients given bisacodyl
for constipation, compared with those given placebo
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• Combination of softener and stimulant institutionalised
elderly beneficial
Kinnunen wt al. Pharmacology. 1993. Oct;47 Suppl 1:253-5
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Drug Treatment for Constipation
Osmotic/Softener laxatives
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• Sugars (Lactulose, Sorbitol), purgatives (Magnesium hydroxide,
Epsom salts) and macragols/ polyethylene glycols (Movicol)
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• Draw water into stool, increase bulk & stimulate colonic motility.
Require plenty of water
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– Lactulose
• Dissachardide, not absorbed, low faecal pH discourages growth of
ammonia-organisms, therefore useful in liver patients
• Not very effective & takes 2-3days to work
• SEs flatulence & cramps
– Movicol PEG+E
• Contain electrolytes, more balanced solution, less dehydrating
• Useful for more resistant cases
• ONLY oral lax recommended for faecal impaction
– Magnesium Hydroxide
• useful short term/rapid use only
1.5
0.9
1.0
1.2
anMedian daily score for
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1.3
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1.5
Less straining with PEG vs lactulose
after 1 month1
1.0
0.5
0.5
0.5
0.0
0.0
PEG (n=50)
Lactulose (n=49)
PEG (n=50)
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Lactulose (n=49)
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Mean stool frequency
per day
Higher stool frequency with PEG vs
lactulose after 1 month1
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• PEG trials in elderly showed increased stool frequency and
less straining versus lactulose
• Studied in community dwelling elderly, institutions
• Study in Parkinson’s Disease showed benefit
• Useful for slow gut transit
• Licenced orally for faecal impaction
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Attar et al. 1999. Gut. Comparison of a low dose polyethylene glycol electrolyte solution with lactulose for treatment of chronic constipation
Gruss et al. 2004. Eur J Ger. 6 (3): 143-150
Culbert et al. 1998. Clin Drug Invest. 16 (5): 355-360
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Rectal Enemas & Suppositories
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• Enemas & Suppositories are absorbed well by rectal mucosa
• Administration can take time and requires dexterity
• Local & systemic SE
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• Stool softeners
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Mendoza. 2007. Alim Pharm & Ther. 26, 9-20
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– Microlax enema (sodium citrate)
– Phosphate enemas
• AVOID in elderly/CKD as these cause electrolyte disturbances
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• Stimulants
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– Arachis oil (groundnut, peanut oil) enema
• CAUTION in patients with nut allergy
• Needs to be warmed to body temperature
– Liquid Paraffin lubricant
• to be avoided because of SE (incl seepage, irritant, granulomatous reactions
& lipoid pneumonia, impair absorption of fat soluble Vits)
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– Glycerol suppositories – rectal stimulation by mildly irritant action
– Picolax - bowel cleansing prep, stimulates nerves, act within 3hrs
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Other Therapies
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Prokinetic drugs
• Procalopride
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– Selective affinity for 5HT4 receptor agonists
– NICE approved 3rd line agent in women. However,
experienced prescriber and 4weeks follow up required
– SEs Headache & GI
– Caution if history of IHD & arrythmias
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• ?Cholinomimetic drugs (e.g. carbachol, neostigmine)
which increase motility
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• Traditionally used by spinal patients
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Rectal Irrigation Systems
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• Rectal irrigation systems increasingly popular as an
alternative to surgery for other patient groups
-B
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– Cardiomed
– Peristeen £70 + £122 accessory unit
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• Requires dexterity & cognitive function
• CI IBD, obstruction
• Risk of perforation estimated 0.002% per irrigation
Christensen P et al. Gastroenterology 2006; 131:738-747. A RCT of transanal irrigation versus conservative bowel management in spinal cord patients
Christensen P etal. Dis Colon Rectum 2009; 52:286-292. Long-term safety of transanal irrigation for constipation and faecal incontinence
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Sacral Nerve Stimulation
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• Useful for UI, FI & C
• Minimally invasive technique
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NICE approval FI, all ages
A few small trials in Constipation
But expensive ££
Specialist centres only
Careful selection
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• Mechanism: Afferent nerve stimulation. Down regulates
efferent nerves to pelvic floor, bladder & bowel via negative
feedback sacral loop
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Cochrane Review 2008 SNS for FI & C ,
Kamm et al. 2010. Neurogastroenterology. 59:333-340. Sacral Nerve stimulation for Intractable Constipation
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Surgery
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• Only considered after conservative measures have
been tried – e.g. sphincter repair
• Failure rate up to 50%
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– Careful selection & counselling required
– Trials in elderly lacking
– Co-morbidities affect outcomes
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– rectoplexy
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• Management of rectal prolapse remains a challenge
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• Rectocoele newer surgical techniques
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– Laparoscopic Rectoplexy, ?STARR
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• Total colectomy & stoma formation last resort only
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– Good childhood toilet training
– Post-partum Pelvic Floor Exercises
– Healthy ageing
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• Promote healthy & active lifestyle
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How to Avoid Bowel Dysfunction in Old
Age - Prevention is Better than Cure
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Care Homes
Immobility
Hospitalised patients – diet, mobility & illness
Simultaneous prescribing of laxs with opiates
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• Identify, assess & treat at risk groups early
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A Multidisciplinary Approach
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• Causes of bowel dysfunction in the elderly are often
multi-factorial
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• Patients present to many different health/social care
professionals
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• A multidisciplinary approach is vital with fully
integrated services & clear referral pathway
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– ? via the continence service
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Key Points for Clinical Practice
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• Constipation is a symptom not a diagnosis
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• Use your clinical skills to obtain a working diagnosis
• The Bristol Stool Chart is useful
• Set realistic ‘Goals of Treatment’ based on symptoms
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• Address life-style factors
• Physiotherapy & biofeedback may be helpful
• Tailor medication to the individual
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• Establishing a bowel management
program can improve or cure the
majority of patients
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Thank you
for listening
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