lower gi bleeding
TRANSCRIPT
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LOWER GI BLEEDING
Clinical Consideration
Ali Salah AlkhudairSupervision by Dr. Atef Khan
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OBJECTIVES By the end of this presentation,we are able
to: Defention of Lower GI Hemorrhage . Classification Deferential Diagnosis Workup and investigation Interventions and Treatments Case Senario
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LOWER GI HEMORRHAGEDefined as an abnormal intraluminal
blood loss from a source distal to the Treitz ligamentum.
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CLASSIFICATION
- Massive- Moderate - Mild
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MASSIVE LOWER GI BLEEDING
Passage of a large volume of red or maroon blood through the rectum
Hemodynamic instability and shock (Systolic blood pressure of less than 90 mm Hg )
Initial decrease in hematocrit level of 6 g/dL or less
Transfusion of at least 2 units of packed red blood cells
Bleeding that continues for 3 days Significant rebleeding in 1 week
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DEFERENTIAL DIAGNOSIS
DIAGNOSIS OF ANAL CONDITIONS WHICH PRESENT WITH:
PAIN AND BLEEDING: Fissures PAIN, LUMP AND BLEEDING: Prolapsed haemorrhoids Carcinoma of the anal canal Prolapsed rectal polyp or carcinoma Prolapsed rectum
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DEFERENTIAL DIAGNOSIS
DIAGNOSIS OF CONDITIONS PRESENTING WITH RECTAL BLEEDING BUT NO PAIN: Blood mixed with stool colon carcinoma Blood streak on stool rectal carcinoma Blood after defaecation haemorrhoids Blood and mucus colitis Blood alone diverticular disease Melaena peptic ulcer
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DEFERENTIAL DIAGNOSIS IN ADULT
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DEFERENTIAL DIAGNOSIS IN CHILDREN
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HEMORRHOIDS (PILES)
* it is one of the commonest cause of rectal bleeding
Causes: carcinoma of the rectum pregnancy: Chronic constipation Also, heart failure, excessive use of laxatives
and portal HTN are causes.
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HEMORRHOIDS (PILES) TYPES INTERNAL HAEMORRHOIDS: -develops above the dentate line. -covered by anal mucosa. -lacks sensory innervation (painless) -bright red or purple in color. EXTERNAL HAEMORRHOIDS: -arise below the dentate line. -covered by St. sq. epith. -innervated by the inferior rectal nerve. Internal H. drains into sup. Rectal veins portal
system External H. drains into inf. Rectal veins I.V.C.
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HEMORRHOIDS (PILES) GRADING FOR INTERNAL TYPE Internal H. are classified by the degree of tissue
prolapse into the anal canal. GRADE 1: they are confined to the anal canal with
minimal bleeding or maybe asymptomatic but do not prolapse.
GRADE 2: they prolapse on defecating or straining
then reduce spontaneously. GRADE 3: prolapse with or without straining and
require manual reduction. GRADE 4: chronically prolapsed and if reducible fall
out again. Others fall out of the anus and are irreducible (strangulated) surgical emergency.
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HEMORRHOIDS (PILES) SYMPTOMS Grade 1 usually are asymptomatic or with minimal
bright red bleeding on defecation. 1-bleeding: -the main and earliest symptom -starts as bright red bleeding on the surface of the stool or on the
toilet paper. 2-prolapse: -a much later symptom -starts transiently on defecation, but occurs with increasing frequency until 3rd degree H. develop. 3-discharge: -a mucous discharge accompanies a prolapsed pile. 4-pruritis 5-pain
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HEMORRHOIDS (PILES) SIGNS
the pt. should be in the left lateral position. INSPECTION: -1st degree H. show no outward abnormality -2nd degree H. may show the skin covered components
when the buttocks are separated or piles may prolapse when the pt. strains.
-3rd degree H. shows the red anal mucosa in their position (3,7,11)
DIGITAL EXAMINATION: internal H. can’t be felt unless
they are thrombosed or in the long standing thickened piles. And should not apply PR
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HEMORRHOIDS (PILES)
INVESTIGATION
1-sigmoidscopy: essential to exclude co-exclude rectal pathology as carcinoma or polyps.
2-barium enema: indicated when sigmoidscopy
and protoscopy can’t explain the symptoms.
3-CBC: anemia, rarely happen in longstanding piles.
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HEMORRHOIDS (PILES)
D.D .
Anal or rectal cancer. Redunculated polyps. Rectal prolapse. Anal fissures or fistula or
hematoma – if painful-
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HEMORRHOIDS (PILES)
COMPLICATION Anemia Strangulation: when a prolapsing pile become
gripped by the external anal sphincter. Thrombosis Ulceration: superficial ulceration of the exposed
mucous membrane. Gangrene Suppuration: uncommon Fibrosis
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HEMORRHOIDS (PILES)
TREATMENT 1-first degree H.: bulk laxatives and high dietary fibers maybe enough to decrease the
constipation2-injection therapy (sclerotherapy): -for the 1st degree and early 2nd degree H. 3- 5 ml of 5% phenol in almond oil is injected through a special syring to the base of the pile or
just above the anorectal ring.4- Rubber band ligation: -effective with 1st and 2nd degree H. -a small o-ring rubber band applied to constrict the mucosa at the base. This will lead to strangulation
of the pile and subsequent sloughing of the pile over a period of 10 days or so. 5-infra-red photocoagulation. 6-cryotherapy: a cryoprope is applied to the overlying mucosa. 7-stretching of the anal sphincter: it improves venous drainage and decrease the need for
straining. Overstretching may lead to anal incontinence. 8-haemorrhoidectomy: Necessary for the 3rd degree H. or in prolapsed thrombosis. Complications of the procedure: Anal stenosis, acute urinary
retention, post-operative haemorrhage.
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CARCINOMA OF THE RECTUM 75% occur in the lower part of the rectal ampulla
papilliferous or a simple ulcer with everted edges. 25% in the upper part of the rectum annular in shape. 90% or rectal cancers can be felt with a finger during
PR.
MACROSCOPIC APPEARANCE: It may be as follows: papilliferous ulcerating commonest stenosing at rectosigmoid colloid
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CARCINOMA OF THE RECTUM
MICROSCOPIC APPEARANCE: *90% are adenocarcinoma *9% are colloid – adenocarcinoma with mucous
production- *1% highly anaplastic carcinoma simplex *at the anus, sq. cc occur but, a malignant tumour
protruding through the anal canal is more likely to be an adenocarcinoma of the rectum invading the anal skin.
Rectal ca is common in middle and old age (50-70 yrs) but can occur in young adults.
It is equally common in both sexes.
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Rectal bleeding: small dark red streak on the stool. If a lot of blood accumulates it can pass as such but this is uncommon.
The surface of the tumour produces mucous which is expressed in a more liquid motion – diarrhea like- but if it pools it can be passed as liquid faeces.
There may be change in bowel habit usually towards constipation.
High annular cancers at the rectosigmoid junction may cause partial obstruction presenting as alternating constipation and diarrhoea.
Tenesmus tumour in the lower part of the rectum is large to fool the sensory mechanisims into thinking it is faeces.
Wight loss: this is common even if there isn’t any metastasis. Small primary lesions maybe symptom less but associated with
multiple metastasis especially to the liver. Here the pt. has upper abdominal pain, malaise and a palpable mass.
Pain is an uncommon symptom.
CARCINOMA OF THE RECTUM Symptoms
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on Rectal Examination: More commonly, only the lower edge of a malignant ulcer can be felt. It
feels hard and bulges into the lumen of the rectum, the edges are everted and the base is irregular and friable.
Upon withdrawal of the finger, you will have blood and mucous on the gloved finger.
If the tumour is in the upper part of the rectum, only the lower edge is felt. This position of the lesion makes it hard to decide if the tumour is
in the rectum or out of it sigmoidscopy is the answer. PR is not reliable in fat people. On general examination: the liver is the most common site for
metastasis. Other sites for metastasis are: supraclavicular lymph glands, the
lungs and the skin. Lung metastasis is uncommon, a chest x-ray is mandatory. The inguinal LN are involved only if the tumour is below the Hiltons line to
involve the skin. If the pt. has palpable inguinal LN, the tumour is most likely to be sq. cc. of
the anal skin.
CARCINOMA OF THE RECTUM SIGNS ON EXAMINATION
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1-Sigmoidscopy: to inspect and take a biopsy. 2-Barium Enema: the indications for this procedure
are: * The growth isn’t visualized by sigmoidscopy *if a second tumour is suspected *ulcerative colitis *familial polyposis3-ultrasound of the abdomen to check liver
metastasis and ascites.
CARCINOMA OF THE RECTUM SPECIAL INVESTIGATIONS
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Benign growth Carcinoma of the sigmoid prolapsing into the pouch of
Douglas. Ovarian or uterine tumours Extension of a carcinoma in the prostate or cervix Diverticular disease Endometriosis Lymphogranuloma inguinale Faeces – known by indentation on examination-
CARCINOMA OF THE RECTUM DDx OF RECTAL TUMOUR
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Curative: Surgery depends on the distance of the tumour from the
anal verge. Upper third tumours resection with anastomosis
between the sigmoid and lower rectum (anterior resection) Lower third tumours less than 5 cm from the anal verge
are ttt by abdominoperineal excision of the rectum + terminal colostomy + adjunctive radiotherapy to reduce recurrence.
Mid third tumours anterior resection if distal clearance can be obtained. This easier in women due to the wide pelvic
CARCINOMA OF THE RECTUM TREATMENT
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Palliative procedure: Even if secondary tumours are present, palliation is
best achieved when the primary is resected. Colostomy is necessary for intestinal obstruction. But
this doesn’t relieve the bleeding, discharge and sacral pain.
In inoperable cases, deep x-ray therapy, diathermy, or laser of the tumour may give temporary relief as may cytotoxic drugs.
CARCINOMA OF THE RECTUM TREATMENT
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This disease may present in one of the following manners: 1-chronic left sided abdominal pain + change in bowel
habits 2-acute abdominal symptoms 3- Rectal bleeding: acute, massive and fresh blood
Elderly pt. with this disease present with a little faint, lower abdominal pain, and a desire to defecate that when emptied pass large volume of fresh blood and clots.
The patients are rarely shocked and don’t require transfusion.
It is diagnosed via barium enema or colonscopy
DIVERTICULAR DISEASE
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Causes of bleeding are: Eroded artery in the mouth of the diverticulum The disease is incidental and the bleeding is due to
angiodysplasia of the chronic mucosa
Surgery is very rarely needed
DIVERTICULAR DISEASE
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It is not a true hematoma but a thrombosis of a vein in the subcutaneous plexus.
SYMPTOMS: 1-Pain: usually due to the tension *it begins gradually increasing in severity over a few
hours and subsiding gradually over few days *it is continuous. *made worse by sitting, moving and defecating *localized to the lump2-Swelling: *appears at the same time as the lump*First it is small and spherical * Then it may enlarge and become more painful
PERI-ANAL HEMATOMA
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SYMPTOMS: 3-Bleeding: this happens only if: *the lump bursts *the skin over the lump ulcerates 4- The skin around the lump is itchy and moist
due to the leakage of the mucous because the lump doesn’t allow the anus to close properly.
PERI-ANAL HEMATOMA
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SIGNS ON EXAMINATION: *Colour: if it is close to the overlying skin which is not
edematous, it is deep red-purple. But if the skin is edematous then its colour can’t be seen.
*The lump is tender especially if it ulcerates. *Shape and size: initially the lump is spherical and up
to 1cm in diameter. If the skin is lax or edematous then the lump is polypoid.
*Surface: covered by skin and the surface beneath it is smooth
*Composition: solid, hard hemispherical mass*Relations: the lump is superficial to the external
sphincter. Not fixed to the skin or other structures. Cannot be reduced to the anal canal.
PERI-ANAL HEMATOMA
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TREATMENT: The symptoms may subside spontaneously after 2-
3 days during which analgesia is given. If it is in the acute phase and the patient doesn’t want to wait, incision under local anaesthesia is the way to go.
PERI-ANAL HEMATOMA
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Anal fissure is a longitudinal split in the skin of the anal canal
Acute fissures are common in children who pass bulky stool quickly
Chronic fissures are most common in the age group 20 and 40 years.
Chronic fissures are common in women after childbirth.
Anal fissures are more common in men than in women.
Multiple fissures may complicate Crohn’s disease.
FISSURE-IN-ANO
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SYMPTOMS: 1-Pain: fissures are the commonest cause of pain in the anal verge both acute and chronic fissures are very painful it begins at defecation and is described as tearing it persists for minutes to hours after defecation it is throbbing or aching in nature 2- Bleeding: acute fissures may streak the stool with blood and stain the toilet
paper Chronic fissures bleed less and may produce little blood stain of
the toilet paper if any. 3-a small skin tag called sentinel tag or sentinel pile may
form at the lower end of a chronic fissure. This tag may be felt by the pt.
FISSURE-IN-ANO
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4- Because of the pain, the pt. is usually constipated.
5-the fibrosis around the chronic fissure prevents a good seal around the anus leading to small amounts of mucous leak on the peri-anal skin pruritus –could be the presenting symptom of a chronic fissure-
6-the symptoms are slow to develop and become long standing, there may be periods of remission
DDx: Crohn’s disease, Trauma (abuse of children), Carcinoma, TB, Syphilis and Psoriasis.
FISSURE-IN-ANO
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TREATMENT: Acute fissures: *if early and small may heal spontaneously. *local anaesthetic ointment + lubricant laxative relief *application of GTN cream relaxes the anal sphincter healing
of the epithelium. *more intractable cases respond to dividing the internal
sphincter submucosally under general anaesthetic. *chemical sphincterotomy using an injection of botox into the
internal sphincter *advantages of the chemical method are: 1-sphincter paralysis is short lived 2-gives a more sustained effect than GTN cream Chronic fissures: require excision
FISSURE-IN-ANO
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TREATMENT: Acute fissures: *if early and small may heal spontaneously. *local anaesthetic ointment + lubricant laxative relief *application of GTN cream relaxes the anal sphincter healing
of the epithelium. *more intractable cases respond to dividing the internal
sphincter submucosally under general anaesthetic. *chemical sphincterotomy using an injection of botox into the
internal sphincter *advantages of the chemical method are: 1-sphincter paralysis is short lived 2-gives a more sustained effect than GTN cream Chronic fissures: require excision
FISSURE-IN-ANO
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DEFENITION:
A fistula is a track lined with epith. Or granulation tissue, connecting two epithelial surfaces. It may connect two body cavities or one cavity and the body’s external surface.
A fistula-in-ano connects the lumen of the rectum or anal canal with the external surface. It is usually lined by granulation tissue.
FISTULA-IN-ANO
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LOW LEVEL FISTULAS: The internal opening is below the anorectal ring. They could be of the following: 1-trans sphincteric 2-inter sphinteric 3-subcutaneous or submucous HIGH LEVEL FISTULAS: The internal opening is above the anorectal ring. They could be of the following: 1-extra sphincteric (pelvirectal supralevator)2-trans sphincteric 3-inter sphincteric
FISTULA-IN-ANO
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SYMPTOMS: Watery or purulent discharge from the external
opening of the fistula Pain is episodic as the fistula fills with pus. If the pus
doesn’t discharge pain is more intense and throbbing
The discharge causes pruritus ani. There may be minor bleeding from the external
opening The symptoms in general are episodic but the
condition hardly ever cures itself
FISTULA-IN-ANO
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GOODSALL’S RULE: The internal opening of an anterior fistula lies along
a radial line drawn from the external opening to the anus, whereas the internal opening of a posterior fistula lies in the mid line posteriorly.
FISTULA-IN-ANO
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ON PR EXAMINATION: The external opening is visible anywhere around the anus usually
close to the anal margin but sometimes a few centimetres away. The opening is not tender but the thickened tissue around it may be. The serous or purulent discharge may be visible. Rectal examination is not painful. The internal opening may be felt. 2/3 are posterior, 1/3 are anterior. Sigmoidscopy and protoscopy are essential to exclude underlying
disease as chron’s or carcinoma or TB. The inguinal LN are not enlarged except if there is inflammation or
secondary infiltration by carcinoma. Don’t forget general examination if there is a suspected systemic
underlying cause.
FISTULA-IN-ANO
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INVESTIGATIONS: fistulogram, endoanal ultrasound, MRI
DDx: pilonidal sinus, hidradenitis, suppurative,
incontinence, chron’s, trauma.
FISTULA-IN-ANO
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TRAETMENT: Superficial and low level fistulas are laid open and allowed
to heal by granulation. There is no loss of continence This is only done if the fistula lies below the anorectal ring High fistulas (suprasphincteric, trans-sphincteric) only the
lower part of the fistula is laid open a non-absorbable ligature (eg.: nylon) termed a seton is passed through the upper part of the fistula left for 2-3 weeks the sphincter is fixed by scar tissue subsequent division of the upper part of the track either by a second operation or by tightening of the ligature.
Lying open the whole track will completely divide the sphincter incontinence
FISTULA-IN-ANO
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Symptoms Pain
Ulcerative Colitis Lower abdominal cramps Relieved with Bowel Movement
Crohn's Disease Constant pain often in right lower quadrant Not relieved with Bowel Movement
Stool Blood Grossly bloody stool in Ulcerative Colitis
Inflammatory Bowel Disease
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Signs Abdominal Mass
Ulcerative Colitis: No abdominal mass Crohn's Disease: Mass often at Right lower quadrant
Gastrointestinal Tract Affected Ulcerative Colitis
Affects only colon Continuous from rectum
Crohn's Disease Mouth to anus potentially affected Discontinuous, "Skip" lesions
Bowel Tissue affected Ulcerative Colitis: Mucosal disease (no granuloma) Crohn's Disease: Transmural disease (granulomas)
Inflammatory Bowel Disease
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LAB INVESTIGATION Appropriate blood tests include : CBC count Serum electrolytes Blood urea nitrogen, creatinine blood grouping and cross matching Coagulation profile including:- (aPTT) - (PT)- platelet count- bleeding time
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INVESTIGATIONFECAL OCCULT BLOOD TESTING • Normally lose 0.5-1.5mL blood/day from GIT• Three types of test– Guaiac-based (Haemoccult II, Haemoccult II Sensa) • Good for detecting large, more distal lesions • Inconsistent – Need >10mL daily blood loss for +ve test 50% of the time – Can detect as little as 1mL of blood in stool • Affected by dietary factors – Foods which darken stool make it harder to read – False positives from dietary iron
– Immunochemical• Do not detect bleeding from upper GIT - localizes to the colon• Can detect as little as 0.3mL of blood in stool• Lab processing required
– Heme-porphyrin test• Very sensitive• High false positive rate• Lab processing required
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INVESTIGATIONFECAL OCCULT BLOOD TESTING
• Sensitivity 60-80%
• False positive rate 5-13%
• If test is positive patients require a colonoscopy or double-contrast Barium Enema + sigmoidoscopy
• If test is positive and the colon has been “cleared”
unless iron deficiency is present no further Ix isnecessary
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INVESTIGATION BARIUM ENEMA
• No role in diagnosis of active lower GIT bleeding
• If used will obscure any subsequent attempts tovisualize by arteriography or colonoscopy• Double contrast enema has 70% sensitivity inelective detection of nonbleeding colonic lesions
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INVESTIGATION COLONOSCOPY • Diagnostic and therapeutic capabilities• Can be used even with ongoing massive bleeding• Characteristic endoscopic findings of recent upper
GITh’age are the same as for lower GIT h’age – Active bleeding - focal adherent clots – Nonbleeding visible vessels• Timing ideally 6-24 hours post presentation – Patient must be in stable condition – Allows bowel prep – This is the time when recurrent bleeding
usually occurs
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INVESTIGATION COLONOSCOPY • Increased risk of bowel perforation – Should not be attempted with ischaemia or severe
mucosal inflammation
• Endoscopic coagulation tx of choice for bleeding AVMs – 2% risk of perforation
• Diverticular bleeding usually not able to be endoscopically coagulated (technically challenging)
• CT Colonoscopy (Virtual colonoscopy) – May have a role in assessment of pts with +ve FOB
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BLEEDING DIVERTICULUM
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INVESTIGATION NUCLEAR SCINTIGRAPHY • Detects bleeding ≥0.05-0.1mL/minute13• Two methods– Technetium 99m (99mTc) sulfur-colloid • Requires no preparation → inject immediately • Short half life • Enhances liver and spleen → can obscure bleeding
sites • Able to detect slower rates of bleeding– 99mTc-labeled red blood cells • Preferred method • Good for intermittent bleeds • Able to visualize bleeds near liver/spleen• 73-98% sensitive
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INVESTIGATION NUCLEAR SCINTIGRAPHY False localization rate ~20%1 (3-59%)– Blood does not remain stationary within bowel lumen • Reflux into small bowel • Rapid transit through bowel with pooling in other areas• Institution dependent– Not available in all hospitals– Variability in quality• ?plan surgery on results• Useful as a prelude to angiography to confirm activehaemorrhage +/- localization– Increased diagnostic accuracy of angiograms in patients with
+ve scans• Not recommended for massive haemorrhage (delays
treatment)
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ACTIVE BLEEDING FROM ASCENDING COLON
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INVESTIGATION ANGIOGRAPHY • Selective mesenteric angiography – Femoral artery punctured – Evaluates SMA then IMA then coeliac axis – Positive test if extravasation of contrast into
bowel lumen• Can detect haemorrhage rates ≥0.5mL/min14• Diagnostic and potentially therapeutic – Adrenaline infusion – Embolization
• Sensitivity 40-86%• Complication rate ~ 2%
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NORMAL SELECTIVE IMA ANGIOGRAM
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INVESTIGATION CT ANGIOGRAPHY • New and evolving technology• Requires modern CT scanner• Fast - < 15mins• Non-invasive• Identifies large and small bowel haemorrhage• Sensitivity and specificity 72-80%17• ? Ix of choice in the future
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INVESTIGATION CAPSULE ENDOSCOPY (CE)
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OBSCURE GIT BLEEDING
• ~5% of patients have bleeding which remains
unlocalized despite extensive Ix• Investigative options – “Push” enteroscopy / Sonde enteroscopy – Capsule enteroscopy – Small bowel follow-through – Meckel’s Scan – Diagnostic laparoscopy – Exploratory laparotomy +/- enteroscopy
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INVESTIGATION ENTEROSCOPY• Requires special instruments – “push” Enteroscope • 2.7m long thin scope – Sonde Enteroscope • scope with balloon attached to peristalses
through the bowel – Paediatric colonoscope use has been reported
• Permits inspection of SB – to proximal jejunum with push enteroscopy – entire SB with Sonde scope
• ~25% diagnostic yield in reported series15
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INVESTIGATION MECKEL’S SCAN• Meckel’s diverticulum = remnant of vitellointestinalduct• Disease of 2’s• only picks up Meckel’s containing gastric mucosa 50%• 99m-Tc-pertechnetate radioisotope used – concentrated mainly by the mucous secretory
cells of the stomach
•85% sensitive• 95% specific• Useful in Ix of young patients with GIT bleeding
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CASE SENARIO A 67 year-old man presented to the emargency department
with a 6 –hour history of bleeding per rectum . The patient’s symptoms began after he developed an urge to
defecate that was followed by several voluminous bowel movements containing maroon-colored stool mixed with blood clots.
The patient complains of feeling light headed just prior to arriving at the hospital but denies any abdmoinal pain his past medical history is significant for borderline hypertension managed with diet control.His surgical history is significant for a right inguinal hernia repair 2 years ago.
His blood pressure is 100/80, pulse rate 100/min , and respiratory rate 20/min.
The results of an examination of his abdomen are unremrkable. The rectal exmination revealed no masses and a large amount of maroon colored stool in rectal vault
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Q
What should be our next step ? What is the most likely Diagnosis ? How would we confirm this Diagnosis?
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REFERENCE BROWSE’S book Last Chapter Churchill’s pocket book of surgery pp 299-
314. Vernava A. Lower Gastrointestinal bleeding.
Dis Colon Rectum 1997;40:846-858 Emedicene
http://emedicine.medscape.com/article/195246-overview
Lecture about Investigation of Lower GI Bleeding by Dr.Dean Trotter
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