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U.G.I. BLEED (VARICEAL
BLEEDING)
Dr. Balvir Singh
Professor
P. G. Deptt. Of medicine
S.N. Medical College ,Agra
• Portal hypertension is directly responsible for the two major
complications of cirrhosis:
- variceal hemorrhage
- ascites.
• Portal hypertension is defined as an increase in hepatic sinusoidal
pressure to 6 mm Hg or greater.
• The development of gastroesophageal varices requires a portal
pressure gradient of at least 10 mm Hg.
• A portal pressure gradient of at least 12 mm Hg is thought to be
required for varices to bleed.
• Portosystemic collaterals decompress the hypertensive hepatic
sinusoids and give rise to varices at different sites.
•
• Variceal hemorrhage is an immediate life-threatening with a 20–
30% mortality rate associated with each episode of bleeding
(Watanabe K, Kimura K, Matsutani S, et al Gastroenterology 1988; 95:434-40)
Sleisenger and Fordtran's Gastrointestinal and Liver Disease Ninth Edition
Pathophysiology of variceal formation
• Portal hypertension results from:
- Increase in portal resistance
- Increase in portal inflow.
• Dilated Collateral vessels forms new vascular sprouts that
connects the high-pressure portal venous system with
lower-pressure systemic veins.
• This process of angiogenesis and collateralization is
insufficient for normalizing portal pressure and leading to
portal hypertension and esophageal
varices.(I.wakiri Y, Grisham M, Shah V Hepatology 2008; 47:1754-63)
• SPLANCHNIC CIRCULATION:
-Vasodilatation, particularly in the splanchnic bed, permits an
increase in inflow of systemic blood into the portal circulation.
(Sikuler E, Groszmann RJ: ion Hepatology 1986; 6:414-18.)
-Splanchnic vascular endothelial cells are primarily responsible for
- mediating splanchnic vasodilatation and
- enhanced portal venous inflow through excess generation
of NO.(Atucha N, Shah V, Garcia-Cardena G, et al
Gastroenterology 1996; 111:1627-32)
• HEPATIC CIRCULATION
The changes in portal flow and resistance also can be viewed as
originating from mechanical and vascular factors.
- Mechanical factors include the fibrosis and nodularity of the
cirrhotic liver.
- Vascular factors include intrahepatic vasoconstriction.
(Rockey DC, Weisiger RA: Gastroenterology 1998; 114:344-51)
pathophysiology of portal hypertension in
cirrhosis.
Causes of portal hypertension
The sites of the portal-systemic
collateral circulation in cirrhosis of the liver
Variceal pressure
• Measurement of the difference between intravariceal pressure and
pressure within the esophageal lumen (the transmural pressure gradient
across the varices) is potentially a more important indicator of bleeding
risk than measurement of hepatic vein pressure gradient(HVPG).
(Nevens F, Bustami R, Schley SI, et al: Hepatology 1998; 27:15-19)
• A miniature pneumatic pressure sensitivity gauge attached to the tip of an
endoscope allows noninvasive measurement of variceal pressure.( Ruiz del
Arbul L, Martin de Argila C, Vasquez M:Hepatology 1992; 16:147)
• A variceal pressure > 18 mm Hg during a bleeding episode is associated
with failure to control bleeding and predicts early
rebleeding.(Gertsch P, Fischer G, Kleber G:Gastroenterology 1993; 105:1159-66)
• Patients on pharmacologic therapy who show a decrease in variceal
pressure of > 20% from baseline have a low probability of bleeding.
DETECTION OF VARICES
Detection of varices can be done by the following techniques:
• A-Upper Gastrointestinal endoscopy
• B-Ultrasound
• C-CT
• D-MRI
• E-Endoscopic ultrasound
• A)-Upper gastrointestinal endoscopy is the most commonly used method to
detect varices.
• The current consensus is that all patients with cirrhosis of the liver should be
screened for esophageal varices by endoscopy.
• In patients in whom no varices are detected on initial endoscopy, endoscopy to
look for varices should be repeated in 2 to 3 years.
• If small varices are detected on the initial endoscopy, endoscopy should be
repeated in 1 to 2 years.[93],[94]
Reporting of esophageal varices
• Various criteria have been used to try to standardize the reporting of esophageal
varices.
• The best known of these criteria are those compiled by the Japanese Research
Society for Portal Hypertension.
The descriptors include :
a) Red color signs (OMINOUS SIGNS) include
- red “wale” markings, which are longitudinal whip-like marks on the varix;
- cherry-red spots, which usually are 2 to 3 mm or less in diameter;
- hematocystic spots, which are blood-filled blisters 4 mm in diameter.
b) Color of the varix can be white or blue.
c) Form(size) of the varix at endoscopy is described most commonly.
Grade I - Esophageal varices may be small and straight;
Grade II - Tortuous and occupying less than one third of the esophageal lumen;
Grade III - Large and occupying more than one third of the esophageal lumen.
d) Location- Varices can be in the lower third, middle third, or upper third of
the esophagus.
• Of all of the aforementioned descriptors:
The size of the varices in the lower third of the esophagus is the most
important.
• Highest risk of variceal bleeding within 1 year is in patients with:
- large esophageal varices,
- Child (or Child-Pugh) class C cirrhosis and
- red color signs on varices.
• B)-Ultrasound examination of the liver with Doppler study of the vessels has been
used widely to assess patients with portal hypertension.
• Features suggestive of portal hypertension on ultrasonography include
- splenomegaly,
- portosystemic collateral vessels, and
- reversal of the direction of flow in the portal vein (hepatofugal flow).
• Some studies have demonstrated that:
- a portal vein diameter greater than 13 mm and
- the absence of respiratory variations in the splenic and mesenteric veins
are sensitive but nonspecific markers of portal hypertension.
These criteria are not used routinely in clinical practice in most centers.
• Transient elastography may be useful in detecting portal hypertension but is not
sufficiently sensitive to recommend as a modality to monitor decreases in portal
pressure in patients on pharmacotherapy.
(The North Italian Endoscopic Club (NIEC) for the Study and Treatment of Esophageal Varices: A
prospective multicenter study. N Engl J Med 1988; 319:983-9)
E)- Endoscopic ultrasound examination (endosonography) is done using
* radial or linear array echo-endoscopes
or
* endoscopic ultrasound mini-probes passed through the working
channel of a diagnostic endoscope
• Endoscopic ultrasonography has been used to study several aspects of esophageal
varices including:
* the cross-sectional area of varices to identify patients at increased
risk of bleeding.(Escorsell A, Gines A, Llach J, et al:Hepatology 2002; 36:936-4o)
* size of and flow in the left gastric vein, azygous vein, and paraesophageal
collaterals;
*changes after endoscopic therapy; and
*recurrence of esophageal varices following variceal ligation.
• Endosonography can be combined with endoscopic measurement of transmural
variceal pressure to allow estimation of variceal wall tension, which is a predictor of
variceal bleeding.(Leung VK, Sung JJ, Ahuja AT, et al:Gastroenterology 1997; 112:1811-6)
• C)- Computed tomography (CT) is :
 useful for demonstrating many features of portal hypertension,
including abnormal configuration of the liver, ascites, splenomegaly, and
collateral vessels.
 helpful in distinguishing submucosal from perigastric fundal varices
 less invasive alternative to conventional angiographic portography.
 is not a recommended screening method for detecting large esophageal
varices.(Kumar S, Sarr MG, Kamath PS:N Engl J Med 2001; 345:1683-8)
• Detection of varices may be an emerging indication for CT.
• Diagnosis of fundal varices by multidetector row CT (MDCT) is at least as
accurate as endoscopic ultrasonography.
• D)- Gadolinium-enhanced magnetic resonance imaging (MRI) is becoming
recognized as a potentially useful method of detecting esophageal
varices.(Matsuo M, Kanematsu M, Kim T, et al:Am J Roentgenol 2003; 180:461-6)
• MRI :
 can be used to measure portal and azygous blood flow
 provides excellent detail of the vascular structures of the liver
 can detect portal venous thrombosis and spleen stiffness
 can accurately assess the stiffness of even fatty livers.
(Talwalkar JA, Yin M, Fidler JL, et al: Hepatology 2008; 47:332-42)
• The role of MRI in the assessment of portal hypertension requires further study.
Management of UGIB
GENERAL MEDICAL
MANAGEMENT
TYPE OF BLEEDING
VARICEAL BLEEDING
NON VARICEAL
BLEEDING
MEDICAL ENDOTHERAPY
SURGICAL
INERVENTION
PRESSURE
TECHNIQUES
A. Medical Therapy
The pharmacologic agents used in the treatment of portal hypertension are
divided into two groups:
(a) Those that decrease splanchnic blood flow
eg. Vasopressin & their analogs , somatostatin & their analogs , β-adrenergic
blocking agents(propranolol)
(b) Those that decrease intrahepatic vascular resistance.
eg. α-adrenergic blocking agents(prazosin), angiotensin receptor blocking
agents and nitrates
(but only nitrates are now considered for clinical use).
* Diuretics, by decreasing plasma volume, may reduce portal pressure but are not
recommended as sole agents for the treatment of portal hypertension.
* Metoclopramide and other gastric prokinetic agents may decrease intravariceal
pressure by contracting the lower esophageal sphincter, but these agents have not
been evaluated in clinical trials and are not recommended.
• Vasopressin and Its Analogs
• Vasopressin(0.1 0.5 units/minute for 4 to 12hrs(up to 48hrs) is an endogenous
peptide hormone that causes splanchnic vasoconstriction, reduces portal venous
inflow, and reduces portal pressure.
It is associated with serious systemic side effects:
* vasopressin may result in necrosis of the bowel.
* It has direct negative inotropic and chronotropic effects on the
myocardium that lead to reduced cardiac output and bradycardia,
respectively.
* antidiuresis can result in hyponatremia.
• Terlipressin(2mg bolus followed by 1mg every 4-6 hrly for 3- 5 days) is a
semisynthetic analog of vasopressin that is cleaved by endothelial peptidases to
release lysine vasopressin.
*Compared with vasopressin, terlipressin results in lower circulatory levels of
the vasopressin analog and a lower rate of systemic side effects.
• Terlipressin is the first choice in many countries because it is the only drug that
has been associated with improved survival.(Levacher S, Letoumelin P, Pateron D, et al
Lancet 1995; 346:865-8)
• Somatostatin and Its Analogs
 Somatostatin is a 14-amino-acid peptide.
Half-life: Following intravenous injection,it has a half-life of 1 to 3
minutes; therefore, longer-acting analogs of somatostatin have been
synthesized.
Analogs: octreotide(t1/2 80-120 min), lanreotide, and vapreotide.
Action: It decreases portal pressure and collateral blood flow by
inhibiting release of glucagon.
• Dose: Following a infusion 250mg followed by an infusion of
6mg/24h for 120 h .(Avgerinos A, Nevens F, Raptis S et al. Lancet 1997; 350: 1495)
• Mostly treatment with somatostatin or octreotide is combined with
endoscopic management of variceal bleeding.
β-Adrenergic Blocking Agents
• Nonselective β-adrenergic blocking agents have been used extensively in
preventing variceal rebleeding.(Lebrec D, Poynard T, Hillon P, et al: N Engl J Med 1981; 305:1371-4. )
• Nonselective beta blockers such as propranolol or nadolol are preferred.
• The usual method of monitoring the efficacy of beta blockers is to observe a
decrease in the heart rate .
• The dose of propranolol or nadolol can be increased gradually every three to five
days until the target heart rate of 25% below baseline or 55 to 60 beats per minute
or the maximum tolerated dose is reached, provided that the systolic blood
pressure remains above 90 mm Hg.
• The usual starting dose of long-acting propranolol is 40 mg once daily and that of
nadolol is 20 mg once daily.
• Because the risk of bleeding is greatest at night, the beta blocker should probably
be administered in the evening.(Sugan OS, Yamamoto K, Sasao K, et al: Hepatol 2001; 34:26-31)
• The side effects of beta-blocker treatment are probably
overemphasized because only approximately 15% of patients need to
discontinue the drug.(Escorsell A, Ferayomi L, Bosch J, et alGastroenterology 1997; 112:2012-16)
• Pts on ß- blocker, in whom the HVPG has decreased to less than
12 mm Hg, the risk of bleeding is virtually eliminated.
• only 30% to 40% of patients respond to a beta blocker, those with better liver
function show the best response.(Escorsell A, Ferayomi L, Bosch J, et al: Gastroenterology 1997; 112:2012-
16)
• In patients who are intolerant of or who have contraindications to beta blockers,
isosorbide mononitrate has been tried but is not better than placebo in preventing
variceal bleeding.(Garcia-Pagan JC, Villanueve C, Vila MC, et al: Gastroenterology 2001; 121:908-14)
• patients who do not achieve a decrease in the HVPG to less than 12 mm Hg, or
greater than 20%, on beta blocker may not respond well to endoscopic variceal
ligation either. (Bureau C, Peron JM, Alric L, et al Hepatology 2002; 36:1361-6)
• Nitrates are no longer recommended, either alone or in combination with a beta
blocker, for primary prophylaxis to prevent first variceal bleeds.
• For secondary prophylaxis (to prevent variceal rebleeding), isosorbide
mononitrate may be added to a beta blocker.
(Garci Pagan JC, Villanueve C, Vila MC, et al: Gastroenterology 2001; 121:908-14)
• The ideal agent for treatment of portal hypertension would be a drug that decreases
intrahepatic vascular resistance.
• A desirable drug would be one that selectively decreases intrahepatic vascular resistance
without worsening systemic vasodilatation.
• long-term administration of prazosin causes worsening of the systemic hyperdynamic
circulation associated with portal hypertension and consequent sodium retention and
ascites.(Albillos A, Lledo JL, Rossi I, et al:Gastroenterology 1995; 109:1257-65)
• In randomized, controlled trials of losartan or another angiotensin II receptor antagonist,
irbesartan, portal pressure was not reduced significantly.
(Schepke M, Werner E, Biecker E, et al:Gastroenterology 2001; 121:389-95.
• Renal function has worsened in patients given losartan or irbesartan.
(Gonzalez-Abraldes J, Albillos A, Banares R, et alGastroenterology 2001; 121:382-8. )
• ET-receptor blockers and liver-selective NO donors are promising investigational agents
for therapies that target intrahepatic vascular resistance.(Failli P, DeFranco R, Caligiuri A, et
al:Gastroenterology 2000; 119:479-92)
• Studies suggest that simvastatin may decrease intrahepatic resistance and maintain
hepatic blood flow while decreasing portal pressure. This effect probably results from
simvastatin-mediated NO release.(Zafra C, Abraldes JG, Turnes J, et
al:Gastroenterology 2004; 126:749-55)
B.Pressure techniques
• Esophageal balloon
• Sengstaken blakemore tube,
• Minnesota tube
• Linton Nicholas tube(only gastric
balloon with gastric aspiration)
• Balloon should be inflated for less than 24 hrs.
75% rebleeding rate after balloon deflation.
• Most reports suggest that balloon tamponade provides
initial control of bleeding in 85% to 98% of cases.
Sleisenger and Fordtran's Gastrointestinal and Liver Disease Ninth Edition
• variceal rebleeding recurs soon after the balloon is deflated in
21% to 60% of patients.
• The major problem with tamponade balloons is a 30% rate of
serious complications, such as aspiration pneumonia,
esophageal rupture, and airway obstruction.
• Clinical studies have not shown a significant difference in
efficacy between vasopressin administration and balloon
tamponade.(Pitcher JL: Safety and effectiveness of the modified Sengstaken-Blakemore tube: A
prospective study. Gastroenterology 1971 Sep;61(3):291–298 )
Sleisenger and Fordtran's Gastrointestinal and Liver Disease Ninth Edition
ENDOSCOPIC THERAPY
Esophageal varices Gastric varices Ectopic varices
A. Sclerotherapy
B. Band Ligation
-Sclerotherapy-
( Cyanoacrylate
injection )
Duodenal Stomal Colonic
A.Endoscopic
glue injection
B. Band ligation
A. Hemostatic clips
B. Band Ligation
Embolization of
varices
Esophageal varices
(a) Sclerotherapy
 * Endoscopic sclerotherapy has largely been supplanted by endoscopic band
ligation, except when poor visualization precludes effective band ligation of
bleeding varices.
 Available evidence does not support emergency sclerotherapy as first-line
treatment of variceal bleeding.
(D’Amico G, Pietras G, Tarantino I, Pagliaro L:Gastroenterology 2003; 124:1277-91).
* The technique involves injection of a sclerosant into (intravariceal) or adjacent to
(paravariceal) a varix.
* The sclerosants used :
• sodium tetradecyl sulfate, (Sotradecol).
• sodium morrhuate,( Scleromate)
• ethanolamine oleate( Ethamolin)
• Polidocanol(3%) {lauromacrogol}
• absolute alcohol
• the choice of a sclerosant is based on availability, rather than on superior efficacy
of one agent over another.
• (b)Endoscopic variceal ligation
* is the preferred endoscopic modality
* the utility of band ligation in the treatment of gastric varices is
limited.
* Variceal ligation is simpler to perform than injection sclerotherapy.
* Endoscopic variceal ligation is associated with fewer complications
than sclerotherapy.
-Varices at the gastroesophageal junction are banded initially, and then more
proximal varices are banded in a spiral manner at intervals of approximately 2 cm;
the endoscope is then withdrawn.
-The procedure involves suctioning of the varix into the channel of an endoscope
and deploying a band around the varix.
-The band strangulates the varix, thereby causing thrombosis.
-Multi-band devices can be used to apply several bands without requiring
withdrawal and reinsertion of the endoscope.
-.
Algorithm for primary prophylaxis of
esophageal variceal hemorrhage
Algorithm for the prevention of
recurrent variceal bleeding (secondary
prophylaxis).
Gastric varices
• 25% of patients with portal hypertension have gastric varices,
• Preferred endoscopic therapy for fundal gastric variceal bleeding is
injection of polymers of cyanoacrylate( N-butyl-2-cyanoacrylate).
(Lo G, Lai K, Cheng J, et al Hepatology 2001; 33:1060-4)
Sarin classificatiion
Type 1 gastroesophageal varices (GOV1)-2 to 5 cm below the
gastroesophageal junction and are in continuity with esophageal varices.
• Type 2 gastroesophageal varices (GOV2) -in the cardia and fundus of the
stomach and in continuity with esophageal varices.
• Type 1 (IGV1)-varices that occur in the fundus of the stomach in the
absence of esophageal varices are called isolated gastric varices.
• Type 2 (IGV2)- varices that occur in the gastric body, antrum, or pylorus
are called isolated gastric varices.
Sarin SK, Lahoti D, Saxena SP Hepatology 1992; 16:1343-9., et al
Gastric varices
Algorithm for the management of
bleeding gastric varices
ectopic varices
• Varices that occur at a site other than the gastroesophageal junction are
termed ectopic varices
• less than 5% of all varix-related bleeding episodes.
• Ectopic varices most commonly manifest with melena or hematemesis.
• The duodenum is a most common site of ectopic varices.
• in patients with inflammatory bowel disease and primary sclerosing
cholangitis who have undergone a proctocolectomy with creation of an
ileostomy varices may develop at junction & termed as stomal varices.
.
• Anorectal varices are reported in 10% to 40% of cirrhotic pts.
Duodenal Varix
Colonic varix
Rectal varix
Algorithm for the management of
bleeding from ectopic varices
SURGICAL THERAPY
• Surgical treatment of portal hypertension falls
into three groups:
1.Non-shunt procedures:
- Esophageal Transection
-Devascularization Procedure
2.Portosystemic shunt procedures:
- Selective Shunts.
- Partial Portosystemic Shunts.
- Portacaval Shunts.
3. liver transplantation
TRANSJUGULAR INTRAHEPATIC
PORTOSYSTEMIC SHUNT(TIPS)
• TIPS reduces elevated portal pressure by creating a communication
between the hepatic vein and an intrahepatic branch of the portal vein.
TIPS is used to treat complications of portal hypertension, mainly
* mainly refactory variceal bleeding and refractory ascites,
* as well as Budd-Chiari syndrome,
* hepatic hydrothorax, and
* hepatorenal syndrome.
• Procedure, the hepatic vein is cannulated through a transjugular
approach, and by using a Rosch needle, the portal vein is cannulated,then
a guidewire is passed to connect the hepatic vein and a branch of the
portal vein. Dilate the tract and a metallic stent is placed.
• Dilate the tract at the confluence of the hepatic vein if required to reduce
the portacaval pressure gradient (the pressure difference between the
portal vein and the inferior vena cava) to below 12 mm Hg
Child-Turcotte-Pugh Scoring System
and Classification
PARAMETER NUMERICAL SCORE
1 2 3
Ascites None Slight Moderate/severe
Encephalopathy none Slight/Mod Mod/severe
Bilirubin(mg/dl) <2 2-3 >3
Albumin(g/dl) >3.5 2.8-3.5 <2.8
Prothrombin time(sec
increased)
1-3 4-6 >6
Total numerical score Child class
5-6 A
7-9 B
10-15 C
MELD score
• The MELD score was created originally to predict survival in patients with cirrhosis and
portal hypertension undergoing placement of a transjugular intrahepatic portosystemic
shunt (TIPS).(Kamath PS, Kim WR: Hepatology 2007; 45:797-805)
• The MELD score incorporates three objective variables into a mathematical formula:
9.57 loge(creatinine) + 3.78 loge(total bilirubin) + 11.2 loge(INR) + 6.43.
• The working range is 6 to 40.
• MELD is used most often for prioritizing the allocation of donor organs for liver
transplantation.
• Before 2002, organs were allocated by the United Network for Organ Sharing (UNOS) on the
basis of the CTP score and time on the wait list.
• In this system were raised in light of subjective variables in the CTP score (specifically, the
amount of ascites and grade of encephalopathy)
• The MELD score eliminating wait time as a criterion for organ allocation.
• Since implementation of the MELD score for prioritizing organ allocation, the number of
deaths among patients on the wait list has decreased
• In interpreting the MELD Score in hospitalized patients, the 3 month mortality is:
40 or more — 71.3% mortality
30–39 — 52.6% mortality
20–29 — 19.6% mortality
10–19 — 6.0% mortality
<9 — 1.9% mortality (Wiesner et al.. Gastroenterology (2003) vol. 124 (1).
Selection of patients-TIPS
• TIPS may worsen liver function & increase the risk of hepatic
encephalopathy.
• Factors associated with a poor prognosis include a
* Emergency TIPS
* Serum alanine aminotransferase (ALT) level
greater than 100 U/L,
* Serum bilirubin level greater than 3 mg/dL
* Pre-TIPS hepatic encephalopathy unrelated to
bleeding.
* Patients with a high CTP(class B & C) or MELD
score.
(Chalasani N, Clark WS, Martin LG, et al:Gastroenterology 2000; 118:138-44).
Complications of TIPS
TIMING OF COMPLICATION COMPLICATION
Procedure –related(life threatening) Cardiopulmonary failure , sepsis
Carotid artery puncture
Intraperitoneal hemorrhage
Early post procedure(1-30 days) Cardiac arrythmias , fever
Hemolytic anemia
Hepatic encephalopathy
Pain , progressive hepatic failure
Pulmonary artery hypertension
Late post-procedure (>30 days) Hepatic encephalopathy
Liver failure
Portal vein thrombosis
Progressive hepatic failure
Shunt stenosis
LIVER TRANSPLANTATION
Proportion of liver transplants
performed for specific indications
O'Leary JG, Lepe R, Davis Gastroenterology 2008; 134:1764-76,
THANK YOU

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variceal bleeding.pdf

  • 1. U.G.I. BLEED (VARICEAL BLEEDING) Dr. Balvir Singh Professor P. G. Deptt. Of medicine S.N. Medical College ,Agra
  • 2. • Portal hypertension is directly responsible for the two major complications of cirrhosis: - variceal hemorrhage - ascites. • Portal hypertension is defined as an increase in hepatic sinusoidal pressure to 6 mm Hg or greater. • The development of gastroesophageal varices requires a portal pressure gradient of at least 10 mm Hg. • A portal pressure gradient of at least 12 mm Hg is thought to be required for varices to bleed. • Portosystemic collaterals decompress the hypertensive hepatic sinusoids and give rise to varices at different sites. • • Variceal hemorrhage is an immediate life-threatening with a 20– 30% mortality rate associated with each episode of bleeding (Watanabe K, Kimura K, Matsutani S, et al Gastroenterology 1988; 95:434-40) Sleisenger and Fordtran's Gastrointestinal and Liver Disease Ninth Edition
  • 3. Pathophysiology of variceal formation • Portal hypertension results from: - Increase in portal resistance - Increase in portal inflow. • Dilated Collateral vessels forms new vascular sprouts that connects the high-pressure portal venous system with lower-pressure systemic veins. • This process of angiogenesis and collateralization is insufficient for normalizing portal pressure and leading to portal hypertension and esophageal varices.(I.wakiri Y, Grisham M, Shah V Hepatology 2008; 47:1754-63)
  • 4. • SPLANCHNIC CIRCULATION: -Vasodilatation, particularly in the splanchnic bed, permits an increase in inflow of systemic blood into the portal circulation. (Sikuler E, Groszmann RJ: ion Hepatology 1986; 6:414-18.) -Splanchnic vascular endothelial cells are primarily responsible for - mediating splanchnic vasodilatation and - enhanced portal venous inflow through excess generation of NO.(Atucha N, Shah V, Garcia-Cardena G, et al Gastroenterology 1996; 111:1627-32) • HEPATIC CIRCULATION The changes in portal flow and resistance also can be viewed as originating from mechanical and vascular factors. - Mechanical factors include the fibrosis and nodularity of the cirrhotic liver. - Vascular factors include intrahepatic vasoconstriction. (Rockey DC, Weisiger RA: Gastroenterology 1998; 114:344-51)
  • 5. pathophysiology of portal hypertension in cirrhosis.
  • 6. Causes of portal hypertension
  • 7. The sites of the portal-systemic collateral circulation in cirrhosis of the liver
  • 8. Variceal pressure • Measurement of the difference between intravariceal pressure and pressure within the esophageal lumen (the transmural pressure gradient across the varices) is potentially a more important indicator of bleeding risk than measurement of hepatic vein pressure gradient(HVPG). (Nevens F, Bustami R, Schley SI, et al: Hepatology 1998; 27:15-19) • A miniature pneumatic pressure sensitivity gauge attached to the tip of an endoscope allows noninvasive measurement of variceal pressure.( Ruiz del Arbul L, Martin de Argila C, Vasquez M:Hepatology 1992; 16:147) • A variceal pressure > 18 mm Hg during a bleeding episode is associated with failure to control bleeding and predicts early rebleeding.(Gertsch P, Fischer G, Kleber G:Gastroenterology 1993; 105:1159-66) • Patients on pharmacologic therapy who show a decrease in variceal pressure of > 20% from baseline have a low probability of bleeding.
  • 9. DETECTION OF VARICES Detection of varices can be done by the following techniques: • A-Upper Gastrointestinal endoscopy • B-Ultrasound • C-CT • D-MRI • E-Endoscopic ultrasound • A)-Upper gastrointestinal endoscopy is the most commonly used method to detect varices. • The current consensus is that all patients with cirrhosis of the liver should be screened for esophageal varices by endoscopy. • In patients in whom no varices are detected on initial endoscopy, endoscopy to look for varices should be repeated in 2 to 3 years. • If small varices are detected on the initial endoscopy, endoscopy should be repeated in 1 to 2 years.[93],[94]
  • 10. Reporting of esophageal varices • Various criteria have been used to try to standardize the reporting of esophageal varices. • The best known of these criteria are those compiled by the Japanese Research Society for Portal Hypertension. The descriptors include : a) Red color signs (OMINOUS SIGNS) include - red “wale” markings, which are longitudinal whip-like marks on the varix; - cherry-red spots, which usually are 2 to 3 mm or less in diameter; - hematocystic spots, which are blood-filled blisters 4 mm in diameter. b) Color of the varix can be white or blue. c) Form(size) of the varix at endoscopy is described most commonly. Grade I - Esophageal varices may be small and straight; Grade II - Tortuous and occupying less than one third of the esophageal lumen; Grade III - Large and occupying more than one third of the esophageal lumen.
  • 11. d) Location- Varices can be in the lower third, middle third, or upper third of the esophagus. • Of all of the aforementioned descriptors: The size of the varices in the lower third of the esophagus is the most important. • Highest risk of variceal bleeding within 1 year is in patients with: - large esophageal varices, - Child (or Child-Pugh) class C cirrhosis and - red color signs on varices.
  • 12. • B)-Ultrasound examination of the liver with Doppler study of the vessels has been used widely to assess patients with portal hypertension. • Features suggestive of portal hypertension on ultrasonography include - splenomegaly, - portosystemic collateral vessels, and - reversal of the direction of flow in the portal vein (hepatofugal flow). • Some studies have demonstrated that: - a portal vein diameter greater than 13 mm and - the absence of respiratory variations in the splenic and mesenteric veins are sensitive but nonspecific markers of portal hypertension. These criteria are not used routinely in clinical practice in most centers. • Transient elastography may be useful in detecting portal hypertension but is not sufficiently sensitive to recommend as a modality to monitor decreases in portal pressure in patients on pharmacotherapy. (The North Italian Endoscopic Club (NIEC) for the Study and Treatment of Esophageal Varices: A prospective multicenter study. N Engl J Med 1988; 319:983-9)
  • 13. E)- Endoscopic ultrasound examination (endosonography) is done using * radial or linear array echo-endoscopes or * endoscopic ultrasound mini-probes passed through the working channel of a diagnostic endoscope • Endoscopic ultrasonography has been used to study several aspects of esophageal varices including: * the cross-sectional area of varices to identify patients at increased risk of bleeding.(Escorsell A, Gines A, Llach J, et al:Hepatology 2002; 36:936-4o) * size of and flow in the left gastric vein, azygous vein, and paraesophageal collaterals; *changes after endoscopic therapy; and *recurrence of esophageal varices following variceal ligation. • Endosonography can be combined with endoscopic measurement of transmural variceal pressure to allow estimation of variceal wall tension, which is a predictor of variceal bleeding.(Leung VK, Sung JJ, Ahuja AT, et al:Gastroenterology 1997; 112:1811-6)
  • 14. • C)- Computed tomography (CT) is :  useful for demonstrating many features of portal hypertension, including abnormal configuration of the liver, ascites, splenomegaly, and collateral vessels.  helpful in distinguishing submucosal from perigastric fundal varices  less invasive alternative to conventional angiographic portography.  is not a recommended screening method for detecting large esophageal varices.(Kumar S, Sarr MG, Kamath PS:N Engl J Med 2001; 345:1683-8) • Detection of varices may be an emerging indication for CT. • Diagnosis of fundal varices by multidetector row CT (MDCT) is at least as accurate as endoscopic ultrasonography.
  • 15. • D)- Gadolinium-enhanced magnetic resonance imaging (MRI) is becoming recognized as a potentially useful method of detecting esophageal varices.(Matsuo M, Kanematsu M, Kim T, et al:Am J Roentgenol 2003; 180:461-6) • MRI :  can be used to measure portal and azygous blood flow  provides excellent detail of the vascular structures of the liver  can detect portal venous thrombosis and spleen stiffness  can accurately assess the stiffness of even fatty livers. (Talwalkar JA, Yin M, Fidler JL, et al: Hepatology 2008; 47:332-42) • The role of MRI in the assessment of portal hypertension requires further study.
  • 16. Management of UGIB GENERAL MEDICAL MANAGEMENT TYPE OF BLEEDING VARICEAL BLEEDING NON VARICEAL BLEEDING MEDICAL ENDOTHERAPY SURGICAL INERVENTION PRESSURE TECHNIQUES
  • 17. A. Medical Therapy The pharmacologic agents used in the treatment of portal hypertension are divided into two groups: (a) Those that decrease splanchnic blood flow eg. Vasopressin & their analogs , somatostatin & their analogs , β-adrenergic blocking agents(propranolol) (b) Those that decrease intrahepatic vascular resistance. eg. α-adrenergic blocking agents(prazosin), angiotensin receptor blocking agents and nitrates (but only nitrates are now considered for clinical use). * Diuretics, by decreasing plasma volume, may reduce portal pressure but are not recommended as sole agents for the treatment of portal hypertension. * Metoclopramide and other gastric prokinetic agents may decrease intravariceal pressure by contracting the lower esophageal sphincter, but these agents have not been evaluated in clinical trials and are not recommended.
  • 18. • Vasopressin and Its Analogs • Vasopressin(0.1 0.5 units/minute for 4 to 12hrs(up to 48hrs) is an endogenous peptide hormone that causes splanchnic vasoconstriction, reduces portal venous inflow, and reduces portal pressure. It is associated with serious systemic side effects: * vasopressin may result in necrosis of the bowel. * It has direct negative inotropic and chronotropic effects on the myocardium that lead to reduced cardiac output and bradycardia, respectively. * antidiuresis can result in hyponatremia. • Terlipressin(2mg bolus followed by 1mg every 4-6 hrly for 3- 5 days) is a semisynthetic analog of vasopressin that is cleaved by endothelial peptidases to release lysine vasopressin. *Compared with vasopressin, terlipressin results in lower circulatory levels of the vasopressin analog and a lower rate of systemic side effects. • Terlipressin is the first choice in many countries because it is the only drug that has been associated with improved survival.(Levacher S, Letoumelin P, Pateron D, et al Lancet 1995; 346:865-8)
  • 19. • Somatostatin and Its Analogs  Somatostatin is a 14-amino-acid peptide. Half-life: Following intravenous injection,it has a half-life of 1 to 3 minutes; therefore, longer-acting analogs of somatostatin have been synthesized. Analogs: octreotide(t1/2 80-120 min), lanreotide, and vapreotide. Action: It decreases portal pressure and collateral blood flow by inhibiting release of glucagon. • Dose: Following a infusion 250mg followed by an infusion of 6mg/24h for 120 h .(Avgerinos A, Nevens F, Raptis S et al. Lancet 1997; 350: 1495) • Mostly treatment with somatostatin or octreotide is combined with endoscopic management of variceal bleeding.
  • 20. β-Adrenergic Blocking Agents • Nonselective β-adrenergic blocking agents have been used extensively in preventing variceal rebleeding.(Lebrec D, Poynard T, Hillon P, et al: N Engl J Med 1981; 305:1371-4. ) • Nonselective beta blockers such as propranolol or nadolol are preferred. • The usual method of monitoring the efficacy of beta blockers is to observe a decrease in the heart rate . • The dose of propranolol or nadolol can be increased gradually every three to five days until the target heart rate of 25% below baseline or 55 to 60 beats per minute or the maximum tolerated dose is reached, provided that the systolic blood pressure remains above 90 mm Hg. • The usual starting dose of long-acting propranolol is 40 mg once daily and that of nadolol is 20 mg once daily. • Because the risk of bleeding is greatest at night, the beta blocker should probably be administered in the evening.(Sugan OS, Yamamoto K, Sasao K, et al: Hepatol 2001; 34:26-31)
  • 21. • The side effects of beta-blocker treatment are probably overemphasized because only approximately 15% of patients need to discontinue the drug.(Escorsell A, Ferayomi L, Bosch J, et alGastroenterology 1997; 112:2012-16) • Pts on ß- blocker, in whom the HVPG has decreased to less than 12 mm Hg, the risk of bleeding is virtually eliminated. • only 30% to 40% of patients respond to a beta blocker, those with better liver function show the best response.(Escorsell A, Ferayomi L, Bosch J, et al: Gastroenterology 1997; 112:2012- 16) • In patients who are intolerant of or who have contraindications to beta blockers, isosorbide mononitrate has been tried but is not better than placebo in preventing variceal bleeding.(Garcia-Pagan JC, Villanueve C, Vila MC, et al: Gastroenterology 2001; 121:908-14) • patients who do not achieve a decrease in the HVPG to less than 12 mm Hg, or greater than 20%, on beta blocker may not respond well to endoscopic variceal ligation either. (Bureau C, Peron JM, Alric L, et al Hepatology 2002; 36:1361-6) • Nitrates are no longer recommended, either alone or in combination with a beta blocker, for primary prophylaxis to prevent first variceal bleeds. • For secondary prophylaxis (to prevent variceal rebleeding), isosorbide mononitrate may be added to a beta blocker. (Garci Pagan JC, Villanueve C, Vila MC, et al: Gastroenterology 2001; 121:908-14)
  • 22. • The ideal agent for treatment of portal hypertension would be a drug that decreases intrahepatic vascular resistance. • A desirable drug would be one that selectively decreases intrahepatic vascular resistance without worsening systemic vasodilatation. • long-term administration of prazosin causes worsening of the systemic hyperdynamic circulation associated with portal hypertension and consequent sodium retention and ascites.(Albillos A, Lledo JL, Rossi I, et al:Gastroenterology 1995; 109:1257-65) • In randomized, controlled trials of losartan or another angiotensin II receptor antagonist, irbesartan, portal pressure was not reduced significantly. (Schepke M, Werner E, Biecker E, et al:Gastroenterology 2001; 121:389-95. • Renal function has worsened in patients given losartan or irbesartan. (Gonzalez-Abraldes J, Albillos A, Banares R, et alGastroenterology 2001; 121:382-8. ) • ET-receptor blockers and liver-selective NO donors are promising investigational agents for therapies that target intrahepatic vascular resistance.(Failli P, DeFranco R, Caligiuri A, et al:Gastroenterology 2000; 119:479-92) • Studies suggest that simvastatin may decrease intrahepatic resistance and maintain hepatic blood flow while decreasing portal pressure. This effect probably results from simvastatin-mediated NO release.(Zafra C, Abraldes JG, Turnes J, et al:Gastroenterology 2004; 126:749-55)
  • 23. B.Pressure techniques • Esophageal balloon • Sengstaken blakemore tube, • Minnesota tube • Linton Nicholas tube(only gastric balloon with gastric aspiration) • Balloon should be inflated for less than 24 hrs. 75% rebleeding rate after balloon deflation. • Most reports suggest that balloon tamponade provides initial control of bleeding in 85% to 98% of cases. Sleisenger and Fordtran's Gastrointestinal and Liver Disease Ninth Edition
  • 24. • variceal rebleeding recurs soon after the balloon is deflated in 21% to 60% of patients. • The major problem with tamponade balloons is a 30% rate of serious complications, such as aspiration pneumonia, esophageal rupture, and airway obstruction. • Clinical studies have not shown a significant difference in efficacy between vasopressin administration and balloon tamponade.(Pitcher JL: Safety and effectiveness of the modified Sengstaken-Blakemore tube: A prospective study. Gastroenterology 1971 Sep;61(3):291–298 ) Sleisenger and Fordtran's Gastrointestinal and Liver Disease Ninth Edition
  • 25. ENDOSCOPIC THERAPY Esophageal varices Gastric varices Ectopic varices A. Sclerotherapy B. Band Ligation -Sclerotherapy- ( Cyanoacrylate injection ) Duodenal Stomal Colonic A.Endoscopic glue injection B. Band ligation A. Hemostatic clips B. Band Ligation Embolization of varices
  • 26. Esophageal varices (a) Sclerotherapy  * Endoscopic sclerotherapy has largely been supplanted by endoscopic band ligation, except when poor visualization precludes effective band ligation of bleeding varices.  Available evidence does not support emergency sclerotherapy as first-line treatment of variceal bleeding. (D’Amico G, Pietras G, Tarantino I, Pagliaro L:Gastroenterology 2003; 124:1277-91). * The technique involves injection of a sclerosant into (intravariceal) or adjacent to (paravariceal) a varix. * The sclerosants used : • sodium tetradecyl sulfate, (Sotradecol). • sodium morrhuate,( Scleromate) • ethanolamine oleate( Ethamolin) • Polidocanol(3%) {lauromacrogol} • absolute alcohol • the choice of a sclerosant is based on availability, rather than on superior efficacy of one agent over another.
  • 27. • (b)Endoscopic variceal ligation * is the preferred endoscopic modality * the utility of band ligation in the treatment of gastric varices is limited. * Variceal ligation is simpler to perform than injection sclerotherapy. * Endoscopic variceal ligation is associated with fewer complications than sclerotherapy. -Varices at the gastroesophageal junction are banded initially, and then more proximal varices are banded in a spiral manner at intervals of approximately 2 cm; the endoscope is then withdrawn. -The procedure involves suctioning of the varix into the channel of an endoscope and deploying a band around the varix. -The band strangulates the varix, thereby causing thrombosis. -Multi-band devices can be used to apply several bands without requiring withdrawal and reinsertion of the endoscope. -.
  • 28. Algorithm for primary prophylaxis of esophageal variceal hemorrhage
  • 29.
  • 30. Algorithm for the prevention of recurrent variceal bleeding (secondary prophylaxis).
  • 31. Gastric varices • 25% of patients with portal hypertension have gastric varices, • Preferred endoscopic therapy for fundal gastric variceal bleeding is injection of polymers of cyanoacrylate( N-butyl-2-cyanoacrylate). (Lo G, Lai K, Cheng J, et al Hepatology 2001; 33:1060-4) Sarin classificatiion Type 1 gastroesophageal varices (GOV1)-2 to 5 cm below the gastroesophageal junction and are in continuity with esophageal varices. • Type 2 gastroesophageal varices (GOV2) -in the cardia and fundus of the stomach and in continuity with esophageal varices. • Type 1 (IGV1)-varices that occur in the fundus of the stomach in the absence of esophageal varices are called isolated gastric varices. • Type 2 (IGV2)- varices that occur in the gastric body, antrum, or pylorus are called isolated gastric varices. Sarin SK, Lahoti D, Saxena SP Hepatology 1992; 16:1343-9., et al
  • 33. Algorithm for the management of bleeding gastric varices
  • 34. ectopic varices • Varices that occur at a site other than the gastroesophageal junction are termed ectopic varices • less than 5% of all varix-related bleeding episodes. • Ectopic varices most commonly manifest with melena or hematemesis. • The duodenum is a most common site of ectopic varices. • in patients with inflammatory bowel disease and primary sclerosing cholangitis who have undergone a proctocolectomy with creation of an ileostomy varices may develop at junction & termed as stomal varices. . • Anorectal varices are reported in 10% to 40% of cirrhotic pts.
  • 36. Algorithm for the management of bleeding from ectopic varices
  • 37. SURGICAL THERAPY • Surgical treatment of portal hypertension falls into three groups: 1.Non-shunt procedures: - Esophageal Transection -Devascularization Procedure 2.Portosystemic shunt procedures: - Selective Shunts. - Partial Portosystemic Shunts. - Portacaval Shunts. 3. liver transplantation
  • 38. TRANSJUGULAR INTRAHEPATIC PORTOSYSTEMIC SHUNT(TIPS) • TIPS reduces elevated portal pressure by creating a communication between the hepatic vein and an intrahepatic branch of the portal vein. TIPS is used to treat complications of portal hypertension, mainly * mainly refactory variceal bleeding and refractory ascites, * as well as Budd-Chiari syndrome, * hepatic hydrothorax, and * hepatorenal syndrome. • Procedure, the hepatic vein is cannulated through a transjugular approach, and by using a Rosch needle, the portal vein is cannulated,then a guidewire is passed to connect the hepatic vein and a branch of the portal vein. Dilate the tract and a metallic stent is placed. • Dilate the tract at the confluence of the hepatic vein if required to reduce the portacaval pressure gradient (the pressure difference between the portal vein and the inferior vena cava) to below 12 mm Hg
  • 39. Child-Turcotte-Pugh Scoring System and Classification PARAMETER NUMERICAL SCORE 1 2 3 Ascites None Slight Moderate/severe Encephalopathy none Slight/Mod Mod/severe Bilirubin(mg/dl) <2 2-3 >3 Albumin(g/dl) >3.5 2.8-3.5 <2.8 Prothrombin time(sec increased) 1-3 4-6 >6 Total numerical score Child class 5-6 A 7-9 B 10-15 C
  • 40. MELD score • The MELD score was created originally to predict survival in patients with cirrhosis and portal hypertension undergoing placement of a transjugular intrahepatic portosystemic shunt (TIPS).(Kamath PS, Kim WR: Hepatology 2007; 45:797-805) • The MELD score incorporates three objective variables into a mathematical formula: 9.57 loge(creatinine) + 3.78 loge(total bilirubin) + 11.2 loge(INR) + 6.43. • The working range is 6 to 40. • MELD is used most often for prioritizing the allocation of donor organs for liver transplantation. • Before 2002, organs were allocated by the United Network for Organ Sharing (UNOS) on the basis of the CTP score and time on the wait list. • In this system were raised in light of subjective variables in the CTP score (specifically, the amount of ascites and grade of encephalopathy) • The MELD score eliminating wait time as a criterion for organ allocation. • Since implementation of the MELD score for prioritizing organ allocation, the number of deaths among patients on the wait list has decreased • In interpreting the MELD Score in hospitalized patients, the 3 month mortality is: 40 or more — 71.3% mortality 30–39 — 52.6% mortality 20–29 — 19.6% mortality 10–19 — 6.0% mortality <9 — 1.9% mortality (Wiesner et al.. Gastroenterology (2003) vol. 124 (1).
  • 41. Selection of patients-TIPS • TIPS may worsen liver function & increase the risk of hepatic encephalopathy. • Factors associated with a poor prognosis include a * Emergency TIPS * Serum alanine aminotransferase (ALT) level greater than 100 U/L, * Serum bilirubin level greater than 3 mg/dL * Pre-TIPS hepatic encephalopathy unrelated to bleeding. * Patients with a high CTP(class B & C) or MELD score. (Chalasani N, Clark WS, Martin LG, et al:Gastroenterology 2000; 118:138-44).
  • 42. Complications of TIPS TIMING OF COMPLICATION COMPLICATION Procedure –related(life threatening) Cardiopulmonary failure , sepsis Carotid artery puncture Intraperitoneal hemorrhage Early post procedure(1-30 days) Cardiac arrythmias , fever Hemolytic anemia Hepatic encephalopathy Pain , progressive hepatic failure Pulmonary artery hypertension Late post-procedure (>30 days) Hepatic encephalopathy Liver failure Portal vein thrombosis Progressive hepatic failure Shunt stenosis
  • 44. Proportion of liver transplants performed for specific indications O'Leary JG, Lepe R, Davis Gastroenterology 2008; 134:1764-76,