constipation and change in bowel habit

Description

medical
newawa
Mind Map by newawa, updated more than 1 year ago
newawa
Created by newawa about 11 years ago
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Resource summary

constipation and change in bowel habit
  1. common
    1. causes: depression,immobility, idiopathic, Functional, inadequate dietary fibre
    2. rare
      1. 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
      2. clinical features
        1. 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
        2. E & I
          1. 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
          2. Managements
            1. 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
            2. IN OLDER PATIENTS
              1. Features suggestive of underlying pathlogy
                1. 1)Anorexia and/weight loss 2)Nocturnal Diarrhoea /pain disturbing sleep 3)rectal bleeding
                2. Examination

                  Annotations:

                  • often unrewarding
                  1. full physical examination mandatory, - lymphadenopathy, abdominal masses, organomegaly , rectal examination
                  2. Management
                    1. 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
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