gastrointestinal tract begashaw m (md). gastrointestinal bleeding has high mortality & morbidity...
TRANSCRIPT
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GASTROINTESTINAL TRACT
Begashaw M (MD)
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Gastrointestinal bleeding
has high mortality & morbidity persistent bleeding and/or recurrence carries
worse outcomes without immediate intervention
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DEFINITION
UGIB blood loss proximal to ligament of Treitz
LGIB blood loss distal to ligament of TreitzHematemesis vomiting of bloodMelena passage of black tar stool Hematochezia passage of blood per rectum
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UPPER GASTROINTESTINAL BLEEDING
Etiology
- PUD –commonest ,DU 4x
- Varices-cirrhosis, portal hypertension
- Gastritis-NSAID
- Gastric ca- Stress ulcer -trauma, shock, sepsis, burn- Mallory-Weiss tear-prolonged violent vomiting
- Esophagitis
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WORK-UP & MANAGEMENT
- Immediate intervention- Having a clinical suspicion of the possible site History- Collapse
- Sweating
- Anxiety, restlessness
- Large amount of bloody vomitus
- Hematochezia/melena
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History
• Scoiodemographic -Age
• PUD hx - past or present
• Drugs
• Liver disease
• Co-morbid diseases
• Symptoms of bleeding diathesis
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Examination
- Rising PR & RR
- Decreasing BP & pulse pressure
- Restlessness
- Increasing pallor
- Cold nose and extremities
- Sweating
- Decreased urine output
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Management
Insert large bore intravenous cannula Rapid crystalloid infusion Blood transfusion Monitor-VS , urine output Anxiety & pain - diazepam, analgesic NG tube - monitor rate of bleeding,saline
lavage
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Stabilized -laboratory data ,further treatmentBlood transfusion Ixns
-Esophago-gastro-duodenoscopy
- Medical therapy
- Endoscopic therapy
- Surgical (operative) - to control the bleeding
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LOWER GI BLEEDING
DDX
- Small intestinal bleeding
- Colorectal bleeding
- Anorectal bleeding
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Small intestinal bleeding
Is uncommon rarely massive difficult to diagnose Usually a diagnosis of exclusion
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Colonic bleeding
Acute & massive chronic occult blood positive stool &
anemia Causes :
-Neoplasms /polyps
-Diverticulosis/ diverticulitis
-Vascular malformations
-Inflammatory causes
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Anorectal bleeding
Causes
- Hemorrhoids
- Anal fissure
- Tumors /polyps
- Proctitis
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Clinical evaluation
Hemodynamic status Hx
-Hematocheziamassive UGIB/bleeding from right colon
-Chronic bleeding
Unexplained anemia
Orthostatic hypotension
Fatigue/weight loss
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Visible bleeding in assosiation with:
- Pain
- Change in bowel habits- Stool frequency
- Stool consistency- Excessive mucus discharge per rectum - Sense of incomplete defecation- Tenesmus
- Pruritus - ani
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Physical examination
Vital sign indices of tissue perfusion signs of chronic blood loss Complete abdominal Exm-DRE pelvic examination-Female
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Treatment
Resuscitation
-first priority
- NG tube lavage to exclude UGIB
- CBC -WBC, HCT/Hb, platelet count
- Esophago-gastro-duodenoscopy (EGD)
- Blood chemistry
- Coagulation profile
- Stool examination
- Lower GI Endoscopy Procto-sigmoidoscopy
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COLORECTAL TUMOUR
Colorectal carcinoma-common causes of death
Symptoms are largely nonspecificMortality & morbidity-GI bleeding & acute
abdomenHigh index of suspicion-Very important
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COLORECTAL CARCINOMA
common second commonest cause of death Usually over 50 years of ageF>MSigmoid/rectummost frequent site
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Pathology
Macroscopic
-Polypoid
-Malignant ulcer
-Annular
-Tubular Microscopically
-Adenocarcinoma
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Predisposing factors
-pre-existing polyps
-Familial adenomatous polyposis
-Ulcerative colitis
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Spread
Local spreadSlow growth Lymphatic spreadRegional LNs Blood streamliver /lungs/skin/bone Trans-coelomicmalignant deposits
peritoneal cavity & to non-adjacent organs
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Clinical features
Right colon
- Anemia
- Loss of appetite/weight loss/ generalized body weakness
- Palpable lump
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Left colon
- Change in bowel habit
- Passage of mucus
- Tenesmus /sense of incomplete defecation
- Rectal bleeding
- Intestinal obstruction
- Pain-> late
- urinary: due to pressure /invasion
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Investigations
S/E - Parasites, WBC, occult blood, culture Sigmoidoscopy colonoscopy Barium enema Biopsy under endoscopic guide
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Staging investigations
Ultrasonography Chest x-ray Liver function test
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Management
depends on
- mode of presentation
- stage of the disease- site of the primary lesion
- presence or absence of multiple lesions
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Modalities
Surgery
- Emergency laparotomy - bleeding , acute abdomen
- Elective surgery
After pre-operative colon preparation
Resection for resectable tumors (curative)
- Palliative: palliative surgery, Cytotoxic chemo therapy, Radiotherapy
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ANORECTAL ABSCESSES
In association with underlying systemic or local diseases
- AIDS, Diabetes mellitus, rectal tumors, inflammatory bowel disease
Complications- fistula in ano
- sepsis perianal sepsis
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Pathogenesis
Caused by mixed micro organismsInfection of anal gland spreads along
tissue planesRisks -Perianal hematoma
-Perianal injurie
-extension from cutaneous boils
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Classification
Perianal-subcutaneous abscess
-commonest type Ischiorectal abscess
-also common
-located in ischiorectal fossa
Sub mucous abscess
-located under the mucous membrane
Pelvirectal abscess
-located above levator ani
-follows spread from pelvic abscess
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Anorectal Abscess
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Clinical features
Pain -severe, fever Constitutional –sweating/anorexiaConstipationLump visible/tender /brownish indurationRectal tender mass
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Management
Drainage Irrigation Packing with saline soaked gauze Sitz bath twice dailyAntibiotics if systemic manifestations
in immunocompromised Analgesics /mild laxatives
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Perianal abscess drainage
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PERIANAL FISTULAS (FISTULA IN ANO)
is a track, lined by granulation tissue, which connects the anal canal or rectum internally with the skin around the anus externally
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Risk factors
Untreated /inadequately treated anorectal abscess
Granulomatous infections IBD -multiple external openings
Tuberculous proctitis
Crohn’s disease
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Classification
Low internal opening below anorectal ring
High internal opening at/above anorectal ring
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Fistula in ano
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Classification
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Goodsall's Rule
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Clinical features
- Seropurulent discharge - perianal irritation
- External opening small elevated opening with a granulation
- Internal openingfelt as a nodule on DRE
- Signs of underlying/associated dss
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Management
- Emergency treatment for abscesses
- Treatment of underlying cause
- Surgery for fistula in ano
- Preceded by
Preoperative bowel cleansing (enema)
Examination under anesthesia
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Surgery
Low level fistula
-fistulotomy/fistulectomy
-Wound care High level fistula
-Protective colostomy to prevent infection and facilitate healing
-Staged operation
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ANAL FISSURE (FISSURE IN ANO)
Elongated tear in the lower anal canalUpper end stops at dentate lineLocated commonly in the posterior midlineOccasionally along the anterior midline
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Etiology
is not completely understoodPassage of hard fecal mass precipitates &
aggravates the condition
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Classification
Acute fissure: deep skin tear at the anal margin extending in to the anal canal with edges showing little inflammatory indurations /edema
- is accompanied with spasm of the anal sphincter muscle
Chronic fissure:Inflamed and indurated margins as a result of inflammatory fibrosis and contracture of the internal sphincter
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Clinical features
- Pain - commonest
- sharp, severe pain starting during defecation and lasting an hour
- Constipation
- Bleeding-bright streaks on the stool surface/toilet paper
- Discharge
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Examination
- Tightly closed anus - sphincter spasm
- skin tag -visible at anal verge
- Lower end of fissure on gentle parting of buttocks
DRE
- local anesthetic gel
- Vertical crack in the anal canal
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Management
Conservative management small acute/ superficial fissure
- high fiber diet
- high fluid intake
- mild laxative-liquid paraffin
- Local anesthetic ointment/suppository
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Surgery
Lateral anal sphincterotomy Fissurectomy /sphincterotomy
used for cases with a chronic fissure
_ complications- hematoma formation
- incontinence
-mucosal prolapse POP care: bowel care, daily bath and softening
the stool till wound healing
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HEMORRHOIDS (PILES)
are dilated sub mucosal veins in the anus Classification
_Internal -Internal to the anal orifice
_External -External to the anal orifice
_Interoexternal- Prolapsing internal hemorrhoids
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INTERNAL HEMORRHOIDS
dilatation of the sub mucosal internal venous plexus and draining superior hemorrhoidal veins
develop within areas of enlarged anal lining (anal cushions’)
In lithotomy position- three groups _3, 7 & 11 o’clockcorresponds to distribution of superior hemorrhoidal vessels (2 on the right,1 on the left)
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Etiology
idiopathicunderlying causes
- Straining accompanying constipation
- Straining at micturition
- Recto Sigmoid mass
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Clinical features
usually asymptomaticRectal bleeding-earliest, bright red painlessProlapse of varicose massesmucoid dischargePruritus aniPainAnemia
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Grading
First degreedo not prolapse out sideSecond degree prolapse on defecation but
reduce spontaneouslyThird degreereplaced manually/stay
reducedFourth degreeremain permanently
prolapsed outside anal margin
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Examination
Abdominal/pelvic examination - underlying causes aggravating factors
Rectal examination
_prolapsing hemorrhoids (piles)
_redundant skin folds/skin tags
_prolapsing /thrombosed
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Investigations
Proctoscopy- to visualize internal hemorrhoids & exclude other lesions
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Complications
Hematochezia Strangulation-acute painThrombosis- swollen, dark, tense & feel
solid / tenderUlceration Gangrene - infection/sepsis Abscess formation
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Management
Conservative measure
- High fiber-diet
- Hydrophilic creams /suppositories
- Local application of analgesic ointment /suppository
- pregnancy and post partum hemorrhoids
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Operative treatment
Hemorrhoidectomy
- Third degree hemorrhoids
- Failure of conservative Mx
- Fibrosed hemorrhoids
- Intero external hemorrhoids
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Treatment of CXN
Strangulation/thrombosis /gangrene
-Immediate surgery
-antibiotic coverage
-pain relief
-bed rest, frequent hot sitz bath
-warm saline compress
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EXTERNAL HEMORRHOIDS
Thrombosed external hemorrhoid - is usually associated with pain
appear inflamed tense tender & easily visible TreatmentAnalgesics Avoid constipationSurgical evacuation of clot
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Surgical drainage of thrombosed hemmoroid