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214            PART 3  ■  Hematology Laboratory Assessments





                                                 H  m                   (   /   L  )                                       Reticulocytes

                MCHC =                                                                               =    /   LL
                                                                                          (
                                      k                  m          m           L/ L)                                      A                                         ,                            m    m
                                                                                                                           m                                                         . A

                    Example: I                   ’      m                       /  L                                                  ,       mm                            (                  )    m

                   m                  %       .     L/L,       MCHC             q     :                                                   m                                                                           -

                                                                                                                                          . D                                             m                     -
                                                                /   L
                                         MCHC =                           =       /   L                                                                                        ,        mm
                                                           .   L/ L                                                                                   reticulocyte.

                                                                                                                                A                                               k                   ,
                    R                         (        )      MCHC        .  %         .  %                                                           ,             m                  ,               x

                    Clinical Conditions:                                                                                      m                     m   .  T         m                                m

                    F                                                                                                                                                                       m                  ;

                  m                                MCHC. T    m  k                                                                     ,         RNA               ,                       m            -

                     m         mm                                                                                                             . D                             m              ,       RNA

               MCHC. O               m                                                  MCHC                                           z   ,                      m                      . T                    -

                             /  L                                        m    (        m                                      m           m                  ,                            m             z

                    m          )                                                   .                    -                                 , m   k                           m

                               .                                                                                                 m                                           .

                    Sources o  Error:                                                                                           U             m                    ,       q

                    T                             MCHC         m                                                                                 m                q

                                           m          m                    H                      m                                                             .      m

                                                             m                          m                                                                    ,                m                               m-

                                             m             k            .                                                                                                                                        .

                    I                                                      m    m                                          B                       m                                      m                    ,

                                              ,       MCV                                                                   /                             m                                                      ,

                     RBC                                                 .                        -                                     q          m

                         m          m                                            MCHC.                                                    .

                                                     ,                    m    m                                                I ,                                                                   m         RNA

                   m             °C              m          m                                                                                                         ,                       m

                    O                                                            MCHC                                                                      m                              m                m   -

                                                    m                                             -                                                                                                     ,                 -

                  m        m          m                        m   . H  m                                                                                                                               . T

                             MCHC.                                                                                                                                                              mm              k  -

                    W             x                                                                  m                                                                                                            .

                              m  z              k               m             C            ,

               MCHC                          x                /  L. T

                                                       m            . F                             H                      Reticulocyte Count

               m                              z        .                                                                   P                m                m                                 W

                                                                                                                           m         m                                              m                      . T
               Red Cell Distribution Width                                                                                 m                                                             ,


               T                                           (RDW)                    m          -                               m                    C             ,                         polychromato-

               m             q                                    m                                    -                   philia     polychromasia.

                                                        z                    m     .                                            S                                m                 reticulocyte

                    RDW                                                                             -                                                               m

                                m                   m             m                                                              RNA    m                           . I                            ,

                                      m                                            m       ,       -                             m                     ,           ,                                      m

                                                                    m                                                      RNA                              m            -       , m       k             k.

                    RDW                                                     z      m                                       S                                                 z               W       -

                   m   ,                                                          m                                                  m                                z

                                       m    (        RDW,      m               MCV)                                        m                  m                                                            ,

                      m                       z                     m    (     m    RDW,                                   m                    . W                                                    ,

               MCV),                                                     q                      m                                                 x           m                  m       k             k.

                                    .  RDW                                                                                      T                                                          q                    m

                     m             ,                                                                                                                                                                                    -

                                                                                                                                                       . U        ,                      x                        -

                                                                                                                                                                    .
                  NOTE: This is a good time to complete Review Questions                                                        T        m                                   .  %       .  %              . I

                  related to the preceding content.
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