There are two ways to issue Blood, first you can issue blood from Blood Bank Status page and other is go to Blood Bank > Blood Issue Details > Issue Blood.

To issue blood click on Issue Blood button, here enter Patient from Select Patient (search for available patient) or create new patient from + New Patient Button or add patient by entering Case ID (you can find Case Id from OPD or IPD detail of Patient) now enter Issue Date, Hospital Doctor, Reference Name, Technician, Blood Group, Bag, Charge Category, Charge Name, Standard Charge, Note, Discount, Tax, Payment Mode and Payment Amount (Payment Amount will automatically calculate) then click on Save & Print or Save button. 

You can check this added record at Blood Issues Details list Page.

To check Blood Issue bill details click on show icon and to delete bill details click on delete icon present at Action column at Blood Issues Details list Page.

To add payment click on Add Payment button icon present at Action column.