Update on the management of refractory variceal bleeding

Received: August 10, 2020; Accepted: August 24, 2020; Published: August 31, 2020 Acute variceal bleeding (AVB) is seen in 50-70% of patients with cirrhosis & portal hypertension (PHT) [1]. Over the passage of time the severity of the variceal bleeding and complications related to it have significantly reduced. This reduction in complications is due to improvement in the clinical management, universal availability of vasopressor drugs, improved endoscopic therapies as well as due to availability of definitive treatment options such as trans jugular intra hepatic porto systemic shunt (TIPS) and liver transplantation. About 10-20% patients presenting with AVB do not respond to the initial management (defined as failure to control bleeding within 48 hrs) and develop re bleeding within 5 days of starting the therapy (after initial control of bleeding), these patients can be defined to have refractory variceal bleeding (Figure 2).

Acute variceal bleeding (AVB) is seen in 50-70% of patients with cirrhosis & portal hypertension (PHT) [1]. Over the passage of time the severity of the variceal bleeding and complications related to it have significantly reduced. This reduction in complications is due to improvement in the clinical management, universal availability of vasopressor drugs, improved endoscopic therapies as well as due to availability of definitive treatment options such as trans jugular intra hepatic porto systemic shunt (TIPS) and liver transplantation. About 10-20% patients presenting with AVB do not respond to the initial management (defined as failure to control bleeding -within 48 hrs) and develop re bleeding within 5 days of starting the therapy (after initial control of bleeding), these patients can be defined to have refractory variceal bleeding ( Figure 2 or RCS (red color signs -red wale signs, cherry red spots) [2][3][4].
In case of treatment failure in an acute bleeding episode, if bleeding is mild and the patient is hemodynamically stable, a second endoscopic therapy should be attempted. If this fails, or if bleeding is severe, it is usually controlled temporarily with balloon tamponade until a definitive derivative treatment is applied. Despite all treatment, a significant proportion of patients do not respond to the therapy. Failure to control bleeding leads to poorer outcomes due to: 1. worsening liver failure 2. development of organ dysfunction due to progressive shock, organ failure 3. systemic sepsis and increased gut translocation of bacteria.
The management in this group of patients depends upon the general condition of the patient and the underlying liver disease status. There was a recent study which showed that endoscopic appearance of  post banding ulcers can determine the patient outcomes in addition and independent to MELD-Na score [4]. It is a combined team effort involving a hepatology, diagnostic radiology, intervention radiology and a liver transplant team.
The goals of the treatment in refractory variceal bleeding is: 1. maintain hemodynamic stability & tissue oxygenation.

Generalized treatment for stabilization of the patient
A. Blood Transfusion: In addition to fluid resuscitation, blood component replacement is an important part of resuscitation in AVB. This includes blood transfusion (packed red blood cell) to maintain a hemoglobin level of 7-8 gram/dl. The restrictive vs liberal treatment regimen of blood transfusion has shown that the restrictive strategy is better in terms of re bleeding and mortality in AVB [5].
B. Coagulopathy correction: The patients with coagulopathy can be treated either with blood products based on lab parameters (INR, platelet count, aPTT) or blood products based on TEG (thromboelastography). The conventional approach in coagulopathy with variceal bleeding is to administer blood components based on abnormalities detected during routine blood tests, but the data on this regimen does not support use of nonspecific blood products in AVB due to its associated side effects and complications.
A recent RCT was done in cirrhotic with GI bleeding and coagulopathy, in this study the patients presented with non-variceal GI bleeding and were managed with TEG guided correction in comparison to standard INR guided correction for coagulopathy. The study concluded that TEG based correction of coagulopathy showed significant reduction in number of blood products being transfused and it was not associated with increased complications, mortality, and bleeding [6,7].
C. Antibiotics: The use of antibiotics is recommended for 5-7 days in the management of variceal bleeding. Broad spectrum antibiotics is recommended in advanced liver disease and third generation cephalosporins are recommended in the compensated liver disease patients. Early administration of antibiotics after AVB has been associated with decreased incidence of rebleeding and overall morbidity [8].
D. Vasopressors: Systemic vasopressors have to be used in the initial management of AVB and a RCT suggested that there was no difference on the type of vasopressor used (terlipressin, octreotide or somatostatin). The vasopressors should be started as early as possible depending upon the availability of the drug. The APASL guidelines for variceal bleeding has advised to target a door to needle (arrival in hospital to the injection of vasopressors) time akin to strategy being used in the management of acute coronary syndromes [2,3,9] (Figure 1).

Control of bleeding i.e. local or systemic A. Local treatment:
i) Tamponade: The tamponade is an effective method to achieve short term homeostasis, these therapies include balloon tamponade, using either a triple lumen (Sengstaken Blakemore tube), a four lumen (Minnesota) or a Linton Nicholas tube (single 600 ml gastric balloon) for control of AVB, these measures are useful in the cases when there is failure to control bleeding at the initial endoscopy or in situations where emergency endoscopy is not available. A retrospective study showed that there was improvement of short-term survival (1 month) as well as long term (1 year) after application of local tamponade in AVB [10].
ii) Endoscopic treatment: This should be instituted as early as possible with a goal to perform endoscopy within 12 hours of AVB.
Local endoscopic therapies include injection of glue, sclerosants and reapplication of bands over the bleeding ulcer. These are used if the deployment of a band is difficult, such as in: a. very small varices, not amenable for banding b. a very large ulcer on which a band cannot be deployed c. excessive bleeding in which there is failure to localize the bleeding spot. In these conditions, injection therapies can be considered with refractory bleeding. (11) The short-term complications of the injection therapies are mediastinitis, bacteremia, ulcer formation and rebleeding.
iii) Hemospray application: In a recent RCT the patients with acute variceal bleeding (AVB) were randomized to standard of care (SOC) vs addition of hemospray to SOC, the study showed that the group in which hemospray was used in addition to SOC showed better outcomes and significantly reduced mortality as compared to SOC alone. However, it is worthy to note that the selection of cases was in first bleeding episode and no cases with refractory bleeding was included in the study. Hence the hemospray can be used as one of the local methods to control variceall bleeding [12]. iv) Placement of SEMS (self-expanding metal stents): There are ample studies available which demonstrate that by using SEMS specially designed for refractory variceal bleeding, the bleeding can be significantly controlled, and the outcomes improved in this patient group. Most of these studies have shown that the SEMS helps in the control of bleeding locally by tamponade over the bleeding varices, however placement of the SEMS has to followed by a definitive treatment procedure such TIPS for reduction of the portal pressure or a liver transplant as definitive treatment since the SEMS has to be removed within 1-2 weeks of deployment. A recent meta analysis showed the technical success to be 97% with control of bleeding in 96% [13][14][15][16].

B. Systemic treatment:
i) TIPS is a treatment for patients who present with refractory bleeding with early liver disease (MELD < 18). There is enough data now to suggest that TIPS is a SOC in refractory variceal bleeding. But in cases with hemodynamic instability, poor liver function (MELD-Na > 18) or previous episodes of hepatic encephalopathy, doing TIPS is a relative contraindication [17,18].
ii) Surgical options including liver transplantation: in patients who have refractory bleeding and are not candidates for TIPS due to advanced liver disease (MELD > 18), ACLF or prior history of recurrent hepatic encephalopathy. These patients can be taken for a liver transplantation as a definitive treatment [17][18][19][20].
In conclusion, refractory variceal bleeding is noted in 10-20% of AVB episodes. Failure to control bleeding leads to further complications and increased morbidity-mortality. Treatment in such patients should be individualized and depends upon the local set up and availability of options at the treating facility.