a) metabolic: 1) Hypothyroidism, 2)Hypercalcaemia
b)Drugs: 1)opiates, 2)Antidepressants, 3)Verapamil
and other ca2+ blockers c)Neoplasia: 1)colon
cancaer 2) Rectal cancer
clinical
features
1) period of constipation , 2)Has the
nature of the problem change 3)
history 4)rectal bleeding 5)Dietary
history 6) Drug history
Annotations:
History
obstetric in women, pelvic trauma during protracted labour,assisted delivery
Drug history- opioids,calcium antagonist, anticholinergics, iron supplements, calcium containing antacids
E & I
a)blood test: 1)FBC, 2)ESR 3)thyroid function and
calcium b) Barium Enema or CT colonography,
c)Transit studies d)Anorectal physiology and
defecating proctography
Managements
a) for reassurance b)Diet and hydration
c)Laxatives= 1)stimulant laxative
2)bulk-forming laxative 3)osmotic
laxative*
Annotations:
Stimulant laxative eg. SENNA , use for short term constipation due to dependant on drugs (especially during hospitalisation)
~bulk forming laxatives eg. FYBOGEL,ISOGEL. may exacerbate symptomatic bloating
~osmotic laxative (e.g MOVICOL, MgSo4) well tolerated, first line treatment over country tablets such as milk of magnesia, epsom salt, lactulose (may cause inconvenient colic and wind
IN OLDER PATIENTS
Features suggestive of underlying pathlogy
1)Anorexia and/weight loss
2)Nocturnal Diarrhoea /pain disturbing
sleep 3)rectal bleeding
Serious disease is sought from FBC, ESR iron
indices, LFTs, Thyroid function, serum calcium.
TO eliminate suspicion of colorectal cancer :
colonoscopy, barium enema, ct colonography