Blood Therapy 2 Flashcards
A single unit can be isolated from every units of donated blood by centrifuging the blood within the closed collection ystem to separate plts from rbc
Platelet concentrates
As the plt number is inadequate Four to six units are pooled together called
Whole blood derived or random donor pooled plts
Advantage of plts conc
Lower cost
Ease of collection
Processing
Disadvantage of plt concentrate
Recipients exposure to multiple donor in a single transfusion and logistic issues related to bacterial testing
Plts are collected in how many hours in apheresis procedure
2-3hrs
In apheresis what are removed and what returned to donor
Plts and wbc removed, rbc and plasma returned
A typical apheresis platelet unit
3 - 6 x10^11
Advantage if single donor apheresis plts
Exposure of the recipient to a single donor rather than multiple donor
Ability to match donor and recipients characteristics such as HLA, Cmv, and blood type certain recipients
Which contain less than 5x10^6 leukocytes
Plts, pooled, buffy coat deried, leucocyte depleted pool pf plts, derived from buffy coat
A single donor plt component containing less than 5x10^6 leucocytes
Plts, apheresis, leucocyte depleted
This component indicated for pt with reaction to plasma containing components
Pksts, suspended in additive, keukocyes depleted, plts concentrate,
Volume of pc
150-450ml
Ph of pc
Bet 6.4-7.4
Leuko ct in pc
Less than 5x10^6
Shelf life of pc
5 days
Practical shelf life of pc
2.3-3days
Pkts ar stored in
Room temp
Cold induces
Clustering of vwf receptor kn tge plt surface and morphological changes of plts
Leading to enhanced
By hepatic macrophages and reduced plts survival in the recipients
Plts are stored at a core temp of
22deg +/- 2 deg with agitation for 5 days in closed system
Plts are stored in room temp to engabce
Bacterial growth and third leading cause of HTR
For any pt who develop a fever within 6 hrs after receiving plts
Sepsis from plts considered
One plt concentrate is usually given to most
Adukt pt
In small childern dec 20kgs and 10-15ml
One plt conc used
In older children
An adukt dose of plts should be used
One plt comc ususlly produces and increase of approx how many plts and how many kg in pt
7000-10000mm3 at 1 hr to 70kg