What does one plus sign for Rh positive mean?
Apr 07, 2023
Source: Cainiu Health
Dr. Zhang Heyang
Introduction
A single plus sign indicating Rh-positive usually refers to the result of ABO-RhD blood typing, meaning the blood type test shows Rh-positive. In addition, among Chinese people, 99.6% are Rh-positive, while only 0.4% are Rh-negative. The D antigen is a mandatory item in routine testing, and during blood transfusion, it is essential to use the same blood type.
RH positive with a single plus sign usually refers to the result from ABO-RHD blood group testing, typically indicating that the blood type test result is RH positive.
The RH positive with a single plus sign generally means the RH blood type is positive. The most common blood group system is the ABO system; if there is a mismatch during transfusion, severe hemolytic reactions may occur. RH refers to a blood group substance present on the surface of red blood cells and is commonly categorized into RH positive and RH negative. Therefore, a test result showing one plus sign for RH usually indicates the presence of RH positive antigen.
Most people are typically RH positive, while a small portion lack the RH antigen and are referred to as RH negative individuals. For these individuals, obtaining blood products when ill or in need of transfusion is often difficult, because RH negative individuals are rare, resulting in a limited number of potential blood donors.
In addition, among Chinese people, 99.6% are RH positive, while only 0.4% are RH negative. The D antigen is a mandatory item in routine blood screening, and during blood transfusion, it is essential to use compatible (same) blood types.
