Management of acute upper GI bleeding Flashcards
Key points
- Initial priorities are resuscitation, risk assessment,
and early endoscopic treatment as described in
National Institute for Health and Care Excellence
Guidance 141 - Non-variceal re-bleeds require interventional
radiological embolization, or surgery. Repeat
oesophagogastroduodenoscopy may allow decisions to be made at this point
Variceal bleeds not responding to endoscopic
therapy need management in a specialist centre,
benefit from balloon tamponade if unstable and
should be considered for transjugular intrahepatic
portosystemic shunt.
- Upper gastrointestinal bleeding due to stress
ulceration in the ICU will occur in up to 15% of
patients not on prophylactic treatment. Current
National Institute for Health and Care Excellence
guidance recommends either H2-receptor antagonists or proton pump inhibitors for primary
prophylaxis
Incidence
acute upper gastrointestinal bleeding (UGIB) in the United Kingdom
varies over the range 84–172/ 100 000 year
Mortality due to upper GI bleeding was found
to be 7% among new admissions, rising to 30% in those who
bled as inpatients
PC
UGIB refers to bleeding from any point proximal to the duodenojejunal flexure. It presents clinically with haematemesis
and/or melaena. Fresh bleeding per rectum is usually indicative
of lower GI bleeding, however massive UGIB can present with
passing of red blood clots rectally
90% of cases, melaena
results from any upper GI bleeding
CAuses
In developing countries with endemic viral hepatitis, variceal bleeding is the commonest category. In Western communities, peptic ulcer disease (PUD) is the commonest cause
e UK, the commonest causes of UGIB are PUD,
oesophagogastric varices with or without portal hypertensive gastropathy
and oesophagitis
Ulcerative Portal hypertension Tumours
Initial assessment
assessment of
severity, general supportive measures and identification of the
cause, should occur in parallel with direct, specific therapies
It is imperative to clarify if the patient has previously presented with UGIB. Sixty per cent of patients who re-bleed, do so from the same source
Drug history is equally important. For example, nonsteroidal anti-inflammatory drugs (NSAIDS) may be identified as a precipitant for bleeding.
Anticoagulant therapies such as
warfarin and new oral anticoagulants (NOACs; direct inhibitors
of thrombin or activated factor Xa) increase the likelihood of
severe bleeding and require specific treatment.
Co-morbid illness may point to a cause for bleeding, such as
chronic liver disease and variceal bleeding. It also identifies
patients at higher risk of developing complications, so requiring
Initial assessment exam
Further establish a potential cause for bleeding and determine severity, so aiding appropriate triage of patients. Signs of chronic liver disease such as
jaundice and spider naevi point to variceal bleeding. Significant
upper abdominal tenderness and rigidity may suggest a complication such as perforation
determines the changes in vital signs,
with some caveats. Initial signs of mild blood loss would
include resting tachycardia. Fifteen per cent loss of blood volume is associated with postural hypotension indicated by a
drop in systolic blood pressure greater than 20 mm Hg or with
an increase in heart rate greater than 20 beats mi
Initial laboratory tests
should include full blood count, liver
enzymes, bilirubin, serum albumin, urea and electrolytes, coagulation screen, and samples for cross matching of blood. Other
specific tests may be required as appropriate, such as screening
for viral hepatitis.
General supportive measures
Patients may require supplemental oxygen to increase oxygen
delivery, particularly with co-morbid lung or heart disease.
Early elective tracheal intubation should be considered in those
with ongoing haematemesis and altered mental or respiratory
status to minimize the risk of aspiration, whilst aiding endoscopy.
Significant co-morbidities lead to a much higher risk of
complications. For those patients and others with signs of
refractory shock
lactate > 4 mmol litre1
, pH < 7.3 after
resuscitation
Invasive arterial monitoring allows closer monitoring of haemodynamic status and facilitates frequent blood
gas and laboratory samples to be taken. Central venous line
insertion, provided coagulation is not deranged, gives secure i.v.
access and allows central venous pressure measurements to be
taken. Flow guided methods of monitoring such as LidCO or
oesophageal pressure monitoring give a more accurate guide to
volume status.
Circulation support
In all patients, two wide-bore cannulas (16G at least) should
be established. Patients should not be given anything by mouth.
Fluid resuscitation starts with rapid infusion of isotonic crystalloid solution, such as Hartmann’s. In patients non-responsive
to crystalloids, resuscitation is continued using blood and fresh
frozen plasma (FFPs). In many centres, a major haemorrhage
protocol can be activated. In extreme circumstances, O negative
blood may be required initially. The authors do not advocate
the use of colloids in resuscitation, given concerns over kidney
injury, worsened coagulopathy, risk of anaphylaxis, and a lack
of benefit over crystalloids.
Blood transfusion
should usually be targeted at patients with haemoglobin (Hb)
level below 70 g litre3 . 4 Evidence comes from a randomized
controlled trial which compared mortality rates at 45 days
between patients randomised to either a restrictive transfusion
strategy (if Hb <70 g litre1 ) or liberal transfusion strategy (if Hb
<90 g litre
The
TRIGGER (Transfusion in Gastrointestinal Bleeding strictive strategies are generally preferred with the exception of patients with
ischaemic heart disease and possibly those with ongoing
haemorrhage
The NICE CG 141 also recommends giving FFP to bleeding
patients with a prothrombin time (or INR) or activated partial
thromboplastin time greater than 1.5 times normal, which are
generally accepted times in other scenarios with major haemorrhage
Cryoprecipitate should be given for fibrinogen levels
below 1.5 g litre1 despite FFP administration. Platelet transfusion should be given to patients with platelet count <50 109
litre1 and considered in those actively bleeding while established on anti-platelet therapy such as clopidogrel. Patients
actively bleeding while taking warfarin therapy should receive
Prothrombin complex concentrate (PCC)
Bleeding and anticoagulants
In bleeding, the activation of a major haemorrhage protocol
and early involvement of senior clinicians, including haematologists is vital.
This is particularly important for those taking NOAC drugs,
the effects of which are not easily reversed.
The European Heart Rhythm Association produced practical guidance on their use.
Recommendations include the use of PCC
alongside general resuscitation in life threatening bleeding.
Dabigatran is the only NOAC drug which may be fully
reversed using an antidote. Idarucizumab has been shown in a
pilot trial to achieve haemostasis in serious bleeding from
dabigatran.7 This monoclonal antibody drug is currently pending approval for use in the UK.
Pharmacotherapy
- PPI
- Terlipressin
PPI
Proton pump inhibitors (PPIs) increase gastric pH to above 6.0.
This optimizes platelet function, inhibits fibrinolysis and
reduces peptic activity, so increasing clot stabilization over
bleeding ulcers. PPI use prior to endoscopy in UGIB was evaluated in a Cochrane systematic review of RCTs comparing PPI
vs control [placebo, or H2-receptor antagonists (H2RAs) or no
treatment].8 It found that PPI significantly reduced the need for
endoscopic therapy and reduced the stigmata of recent haemorrhage during index endoscopy, but there was no evidence
of improved clinically important outcomes, namely mortality,
re-bleeding or need for surgery. NICE therefore advises against
the use of PPI prior to endoscopy.3 PPIs should be prescribed
postendoscopy for those with non-variceal UGIB and stigmata
of recent haemorrhage
Terlipressin
Terlipressin is a synthetic analogue of Vasopressin, with a
slow, sustained release allowing administration via intermittent injections. It reduces portal blood flow, hence variceal bleeding. It is the only vasoactive drug proven to reduce
mortality
uring resuscitation measures and prior to endoscopic confirmation. Terlipressin can be stopped once definitive
haemostasis is achieved and in any case after 5 days.
octreotide
In a recent RCT, somatostatin and its
metabolite octreotide have proven to be as effective as
terlipressin.10 In 2015 the British Society of Gastroenterology
(BSG) published guidance on managing variceal haemorrhage.11
This suggests using terlipressin or somatostatin and if unavailable using octreotide off license
TIPS
Transjugular intrahepatic portosystemic shunt (TIPS)
acute liver failure, hepatic encephalopathy, hemorrhage, biliary injury, injury to surrounding organs, TIPS thrombosis, TIPS dysfunction, and TIPS migration
