Question 1

Can GBS be used in patients already on aspirin or NSAIDs?

Accepted Answer

Yes — GBS was validated in unselected UGIB populations including patients on antiplatelet therapy. However, the BUN component may be lower in patients with mild bleeding, so the score may underestimate risk in this setting. Always use clinical judgment for patients on antithrombotic therapy.

Question 2

What about patients with chronic kidney disease — does BUN lose its predictive value?

Accepted Answer

Elevated BUN from CKD may produce a falsely high GBS. However, BUN elevation in CKD still correlates with bleeding severity because upper GI bleeding further raises BUN above the patient's baseline. If the baseline BUN is known, consider the rise from baseline rather than the absolute value.

Question 3

Is GBS 0 safe enough to discharge a patient without endoscopy?

Accepted Answer

Yes — multiple large validation studies have shown that GBS 0 has a sensitivity of > 98% for identifying patients who will need intervention. ESGE guidelines recommend that low-risk patients with GBS ≤ 1 may be considered for early discharge without inpatient endoscopy, provided appropriate outpatient follow-up can be arranged.

Question 4

How is cardiac failure defined for GBS scoring?

Accepted Answer

Cardiac failure refers to a documented history of heart failure (requiring treatment). The original study used physician-diagnosed cardiac failure; do not score it based on isolated clinical signs without a confirmed diagnosis.