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Kalyan Roy: LTOWB as a Practical Approach to Rapid Transfusion in Major Bleeding
Kalyan Roy/ LinkedIn
Mar 21, 2026, 16:56

Kalyan Roy: LTOWB as a Practical Approach to Rapid Transfusion in Major Bleeding

Kalyan Roy, Transfusion Medicine Specialist at Square Hospitals LTD, shared a post on LinkedIn:

“When seconds decide survival, one unit can change everything : Low-Titer Group O Whole Blood (LTOWB)

LTOWB is gaining momentum as a practical approach to rapid transfusion in major bleeding. By delivering red cells, plasma, and platelets in a single unit, it helps clinicians act faster and streamline resuscitation during critical moments.

What it means:
Group O blood means Red blood cells have no A or B antigens, so they can be given to almost anyone (universal donor for RBCs).

Whole blood means it contains all components:

  • Red blood cells (oxygen transport)
  • Plasma (with clotting factors)
  • Platelets (help stop bleeding)

Low titre means the donor’s plasma has low levels of anti-A and anti-B antibodies.

Why ‘low titre’ is important:
Normally, group O blood plasma contains anti-A and anti-B antibodies, which can attack a recipient’s red cells if they are not group O.

In LTOWB:
These antibodies are present in very low amounts
This reduces the risk of hemolytic reactions when transfused into non-O patients

Why it’s used:

LTOWB is commonly used in:

  • Severe trauma (e.g., accidents, war injuries)
  • Massive bleeding (hemorrhage)
  • Emergency settings where blood typing isn’t immediately available

Advantages:

  • Faster and simpler than giving separate components
  • Provides balanced resuscitation (RBCs with plasma and platelets together)
  • May improve survival in critical bleeding

Why it stands out:

  • Faster response with fewer components to manage
  • Supports early balanced resuscitation
  • Increasing adoption in both hospital and prehospital settings

What matters for safe implementation:

  • Clearly validated ‘low-titer’ testing and thresholds
  • Strict adherence to production and storage standards
  • A defined Rh strategy (who receives O-negative vs O-positive)

Getting started:

  • Select appropriate donors and set eligibility criteria
  • Establish clear clinical triggers for use
  • Track outcomes through hemovigilance and regular audits

Simple summary:
LTOWB is Whole blood from group O donors with low antibody levels, safe for emergency transfusion across different blood types.”

Kalyan Roy

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