most if not all of the following thresholds are based on weak recommendations with low quality evidence
<50K if planned lumbar puncture or neurosurgical procedure
<20K if planned for central venous catheter placement (preference toward compressible site), or febrile patient
<10K in asymptomatic patients (unless due to ITP, TTP, or HIT)
There are no firm recommendations for<unk>  thresholds in acute traumatic bleeding but many providers will opt for a goal of 100K, especially if there is evidence of ICH
Platelet transfusion
Cryoprecipitate transfusion
Exchange transfusion
Prothrombin complex concentrates
Massive transfusion 
Massive transfusion
Fresh frozen plasma
Packed red blood cells