A 30 year old male was given blood transfusion in the O.T. following which he develops tachycardia, hypotension BP-70/40 mm of Hg and hematuria within 10 minutes of staing the transfusion. The most probable cause is?
**Core Concept**
The clinical scenario describes a severe hemolytic transfusion reaction, which is a life-threatening complication that can occur during blood transfusion. This condition is characterized by the breakdown of red blood cells, leading to the release of hemoglobin and other cellular components into the bloodstream.
**Why the Correct Answer is Right**
The patient's symptoms, including tachycardia, hypotension, and hematuria, are indicative of a severe hemolytic transfusion reaction. This is likely due to an acute hemolytic transfusion reaction, which occurs when there is an ABO incompatibility between the donor blood and the recipient's blood. The reaction triggers the activation of the complement system, leading to the formation of membrane attack complexes (MACs) that cause red blood cell lysis. The resulting release of hemoglobin and other cellular components can cause hypotension, tachycardia, and hematuria.
**Why Each Wrong Option is Incorrect**
**Option A:** Although anaphylaxis is a severe allergic reaction that can cause hypotension and tachycardia, it is not typically associated with hematuria or hemolytic anemia.
**Option B:** Transfusion-related acute lung injury (TRALI) is a condition that can cause hypotension and tachycardia, but it is not typically associated with hematuria or hemolytic anemia.
**Option C:** Transfusion-associated circulatory overload (TACO) is a condition that can cause hypotension and tachycardia, but it is not typically associated with hematuria or hemolytic anemia.
**Clinical Pearl / High-Yield Fact**
The most common cause of hemolytic transfusion reactions is ABO incompatibility, which can be prevented by careful blood typing and cross-matching before transfusion.
**Correct Answer: C. Transfusion-related acute lung injury (TRALI) is a condition that can cause hypotension and tachycardia, but it is not typically associated with hematuria or hemolytic anemia.